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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 3810. Отображено 100.
16-02-2012 дата публикации

Piston for an internal combustion engine and method for its production

Номер: US20120037113A1
Автор: Matthias Seifried, Rainer Scharp
Принадлежит: MAHLE International GmbH

A method for the production of a piston has the following method steps: (a) providing a blank of a piston base body, having an outer joining surface, an inner joining surface and a circumferential lower cooling channel part that runs between the two joining surfaces, (b) providing a blank of a piston ring element, having an outer joining surface, an inner joining surface and a circumferential upper cooling channel part that runs between the two joining surfaces, (c) forming a circumferential widened region on at least one joining surface, the widened region extending toward the related cooling channel part, (d) connecting the blank of the piston base body with the blank of the piston ring element by way of their joining surfaces, by friction welding, to produce a piston blank, and (e) machining the piston blank further and/or finish-machining it to produce a piston.

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Номер записи: 1
12-07-2012 дата публикации

Method of manufacturing gear

Номер: US20120177457A1
Автор: Eiri Nagata
Принадлежит: Aisin Seiki Co Ltd

A method of manufacturing a gear by a skiving process, the skiving process utilizing a cutter including a rotational axis inclined to a rotational axis of a work to be processed into the gear, the skiving process feeding the cutter in a tooth trace direction of a tooth to be formed at the work in a state where the cutter rotates in synchronization with the work, the method includes a surface hardening process for hardening a work surface of the work before the skiving process is performed.

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Номер записи: 2
03-01-2013 дата публикации

Method for producing a piston for an internal combustion engine and piston that can be produced by means of said method

Номер: US20130000590A1
Автор: Klaus Keller
Принадлежит: MAHLE International GmbH

The present invention relates to a method for producing a piston ( 10 ) from an upper piston part ( 11, 111, 211 ) and a lower piston part ( 15 ). A strip- or plate-shaped semifinished product ( 22 ) made of a metal material is provided, from which an annular upper piston part ( 11, 111, 211 ) or an annular blank ( 25 ) is stamped out, which blank is finished to form an upper piston part ( 11, 111, 211 ), wherein the upper piston part ( 11, 111, 211 ) is connected to a lower piston part ( 15 ) to form a piston ( 10 ).

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Номер записи: 3
21-03-2013 дата публикации

Piston, Method of Construction, and Piston Body Portions Thereof

Номер: US20130068094A1
Автор: Carmo Ribeiro
Принадлежит: Federal Mogul LLC

A method of constructing a piston, piston formed thereby, and piston body portions are provided. The method includes providing an upper crown portion at least one annular upper rib depending from the upper combustion wall to a free end having a tapered peak. The method further includes providing a lower crown portion having at least one annular lower rib extending to a free end having a tapered peak. Then, moving the upper crown portion and the lower crown portion toward one another and initiating contact between the upper crown portion and the lower crown portion at their respective tapered peaks. Then, continuing moving the upper crown and the lower crown further toward one another after making initial contact at their respective tapered peaks and forming a friction weld joint between the free ends of the at least one upper rib and the at least one lower rib free end.

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Номер записи: 4
18-04-2013 дата публикации

METHOD FOR SIMULTANEOUSLY PRODUCING FIRST AND SECOND PISTON PARTS

Номер: US20130092024A1
Автор: Keller Klaus, Scharp Rainer
Принадлежит:

A method and apparatus for simultaneously producing a first piston part and a second piston part via a forging device may include an upper die, at least one intermediate die, and a lower die. A first billet may be placed between the upper die and the intermediate die, and a second billet may be placed between the intermediate die and the lower die. The upper die and the lower die may be configured to be moved toward each other, whereby the first piston part is forged from the first billet and the second piston part is forged at the same time from the second billet. The upper die and the lower die may then be configured to be moved apart, and the piston parts may be removed. 19-. (canceled)10. A method for simultaneously producing a first piston part and a second piston part via a forging device , comprising: an upper die , at least one intermediate die and a lower die , andplacing a first billet between the upper die and the intermediate die, and placing a second billet between the intermediate die and the lower die,moving the upper die and the lower die toward each other, whereby the first piston part is forged from the first billet and the second piston part is forged at the same time from the second billet,moving the upper die and the lower die apart, andremoving the piston parts.11. The method according to claim 10 , wherein the first piston part is formed as at least one of a piston upper part and a piston lower part claim 10 , and wherein the second piston part is formed as at least one of a piston upper part and a piston lower part.12. The method according to claim 11 , wherein the intermediate die is held in position during forging by a spring device.13. The method according to claim 12 , wherein only one of the upper die and the lower die is moved.15. The method according to claim 13 , wherein the forged piston parts are subsequently subjected to at least one of a turning claim 13 , milling and grinding operation.16. The method according to claim 10 , ...

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Номер записи: 5
18-04-2013 дата публикации

CONNECTING ROD LUBRICATION RECESS

Номер: US20130092119A1
Автор: Dinu Dan H., Krause Roger A., Lapp Michael T., McEwan Alan Stephen
Принадлежит: MAHLE International GmbH

Exemplary connecting rods and methods of making a connecting rod are disclosed. A method of making a connecting rod may include the step of providing a connecting rod blank, where the connecting rod blank includes a crankshaft end and a piston pin end. The method may further include forming a crankshaft pin recess in the crankshaft end of the connecting rod blank and a piston pin recess in the piston pin end, and forming at least one lubrication recess in the piston pin end of the connecting rod blank. The lubrication recess and the piston pin recess may both formed concurrently. 1. A method of manufacturing a connecting rod , comprising:providing a connecting rod blank, where the connecting rod blank includes a crankshaft end and a piston pin end; andforming a crankshaft pin recess in the crankshaft end of the connecting rod blank, a piston pin recess in the piston pin end, and at least one lubrication recess in the piston pin end of the connecting rod blank; andwherein the lubrication recess and the piston pin recess are both formed concurrently.2. The method as recited in claim 1 , the at least one lubrication recess including an outer profile having a final predetermined configuration claim 1 , and substantially defining the predetermined final configuration of the outer profile of the at least one lubrication recess by the forming of the piston pin recess step.3. The method as recited in claim 1 , further comprising a generally circular depression within the piston pin recess claim 1 , the depression defining one of the at least one lubrication recesses and forming at least a portion of the outer profile of the lubrication recess.4. The method as recited in claim 1 , further comprising:removing a piston pin material flash and a crankpin material flash from the piston pin recess and the crankpin recess, thereby creating a piston pin bore and a crankpin bore.5. The method as recited in claim 4 , wherein removing the piston pin flash and the crankshaft pin flash ...

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Номер записи: 6
16-05-2013 дата публикации

ASYMMETRIC TOOTHING

Номер: US20130118283A1
Автор: Tumback Stefan
Принадлежит: ROBERT BOSCH GMBH

The invention relates to a toothing, in particular between a starting pinion () and a ring gear () of an internal combustion engine. The toothing is designed as straight or oblique toothing and comprises a number of individual teeth () that mesh with one another. The thicknesses of the individual teeth () are asymmetrical, in particular in reduced or widened form on one or both sides. 12225202210212202. A toothing between a starter pinion () and a ring gear () of an internal combustion engine , wherein the toothing comprises individual teeth () meshing together , characterized in that tooth thicknesses ( , ) of the individual teeth () are configured to be asymmetrical , reduced on one or both sides or widened.22102282302225212236240. The toothing as claimed in claim 1 , characterized in that a tooth thickness () in a flank region () on one front face () of the starter pinion () or the ring gear () is configured with reduced tooth thicknesses ( claim 1 , ) or a widened tooth thickness ().3212236208230202. The toothing as claimed in claim 2 , characterized in that the reduced tooth thicknesses ( claim 2 , ) are configured along a reduced tooth width () starting from the front face () of the individual tooth ().422821223620803. The toothing as claimed in claim 3 , characterized in that a torsional flank clearance in the flank region () which is configured in the reduced tooth thickness ( claim 3 , ) along the reduced tooth width () is greater than . MM.5228. The toothing as claimed in claim 4 , characterized in that the torsional flank clearance outside the flank region () is minimized.6204212208226212236210. The toothing as claimed in claim 3 , characterized in that the tooth flank () on which the reduced tooth thickness () is configured along the reduced tooth width () claim 3 , comprises a transition flank region () within which the reduced tooth thicknesses ( claim 3 , ) merge uniformly and continuously with the tooth thickness ().7234236202. The toothing as ...

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Номер записи: 7
30-05-2013 дата публикации

Method for producing a cooling channel system for internal combustion engines and piston produced in this way

Номер: US20130133610A1
Автор: Volker Gniesmer
Принадлежит: KS KOLBENSCHMIDT GMBH

A method for producing a cooling channel system for an internal combustion engine, which has a cooling channel in the piston crown. The piston crown is adjoined by a lower piston part having a piston boss, pin bores and piston skirts. Firstly, a piston blank having a peripheral collar projecting radially in the region of the piston crown is produced, wherein the collar, forming a subsequent ring zone wall is then reshaped and, in a transition area between the piston crown and the lower piston part, a contact area for the collar is formed, and the collar is reshaped in such a way until the outer radially peripheral edge comes very close to or completely into contact with the contact area in order to form a closed cooling channel. Following the reshaping, the end region of the ring zone wall forms a defined gap (X) with respect to the upper edge of the piston skirt.

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Номер записи: 8
06-06-2013 дата публикации

PLANETARY ROLLER GEAR DRIVE

Номер: US20130143712A1
Автор: Meisborn Marco, Osterlanger Jurgen
Принадлежит: SCHAEFFLER TECHNOLOGIES AG & CO. KG

Planetary roller gear drive with a spindle nut () that is arranged on a threaded spindle () and is divided into nut parts () that can be adjusted relative to each other in the axial direction, and with a plurality of planets () that are arranged distributed around a periphery and are in roller engagement with the spindle nut () and the threaded spindle (). An adjustment part () set in the axial direction against the one nut part () that can be adjusted in the axial direction is provided and the one nut part () that can be adjusted in the axial direction is arranged between this adjustment part and the other nut part (). 1. A planetary roller gear drive comprising: a spindle nut arranged on a threaded spindle , the spindle nut is divided into first and second nut parts that can be adjusted relative to each other in an axial direction , a plurality of planets that are arranged distributed around a periphery and are in rolling engagement with the spindle nut and the threaded spindle , an adjustment part is set against the first nut part and is adjustable in the axial direction and the first nut part is adjustable in the axial direction and is arranged between the adjustment part and the second nut part.2. The planetary roller gear drive according to claim 1 , wherein the adjustment part is fixed in a receptacle part of the spindle nut.3. The planetary roller gear drive according to claim 2 , wherein the receptacle part and the adjustment part have support profiles that engage in one another with a positive fit for support of the adjustment part with a positive fit in the axial direction.4. The planetary roller gear drive according to claim 3 , wherein one of the support profiles is formed by plastic shaping of material in the other support profile.5. The planetary roller gear drive according to claim 3 , wherein the adjustment part is constructed as an adjustment ring that is arranged on the threaded spindle and has an outer lateral surface on which the support profile ...

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Номер записи: 9
13-06-2013 дата публикации

One-Piece Piston With Improved Combustion Bowl Rim Region and Method of Manufacture

Номер: US20130146017A1
Автор: Muscas Florin, Weinenger Michael
Принадлежит: FEDERAL-MOGUL CORPORATION

A piston for an internal combustion engine and method of construction thereof is provided. The piston includes a piston body having an upper combustion surface with a combustion bowl depending from the upper combustion surface. The piston body has a ring belt region configured for receipt of at least one piston ring adjacent the upper combustion surface. A cooling gallery is configured in radial alignment with the ring belt region. An annular combustion bowl rim region extends between the upper combustion surface and the combustion bowl, and a bonded seam extends from the combustion bowl rim region radially outwardly to the cooling gallery. The bonded seam has material properties exhibiting an enhanced ability to withstand the extreme temperature, pressure, stress and highly corrosive and erosive effects of the combustion gases relative to the surrounding material of the piston body. 1. A piston for an internal combustion engine , comprising:a piston body having an upper combustion surface with a combustion bowl depending from the upper combustion surface;a ring belt region configured for receipt of at least one piston ring adjacent said upper combustion surface;a cooling gallery configured in radial alignment with the ring belt region;an annular combustion bowl rim region extending between said upper combustion surface and said combustion bowl; anda bonded seam extending from said combustion bowl rim region radially outwardly to said cooling gallery, said bonded seam having material properties with an enhanced ability to withstand the extreme temperature, pressure, stress and highly corrosive and erosive affects of the combustion gases relative to the surrounding material of said piston body.2. The piston of wherein said bonded seam extends along a first portion and a second portion claim 1 , said first portion being inclined relative to said second portion.3. The piston of wherein said first portion is frustroconical and said second portion is planar.4. The piston ...

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Номер записи: 10
04-07-2013 дата публикации

PROCESS FOR MANUFACTURING A FORMED METALLIC WORK PIECE WITH ARMORING

Номер: US20130167799A1
Автор: KOLBE Peter, Körner Thomas, SCHMITZ Ernst-Peter
Принадлежит: GESENKSCHMIEDE SCHNEIDER GMBH

A process for near-net-shape manufacturing of a formed metallic work piece with armoring, with the armoring having different properties than the basic work piece material, including the steps of providing an armoring blank; providing a basic work piece blank; arranging the armoring blank on the basic work piece blank; welding together a surface section of the work piece blank and the armoring blank, thereby creating a blank with an armored surface section; and forming the resulting blank with an armored surface section, thus producing a near-net-shape work piece contour by means of a process which is selected from the group comprising: forging, upsetting, electro upsetting, and extrusion, at a temperature in one of a cold, half-warm and warm temperature range, thereby producing a near-net-shaped formed armored work piece. 1. Process for near-net-shape manufacturing of a formed metallic work piece with armoring , with the armoring having different properties than the basic work piece material , including the steps of:providing an armoring blank;providing a basic work piece blank;arranging the armoring blank on the basic work piece blank;welding together a surface section of the work piece blank and the armoring blank, thereby creating a blank with an armored surface section; andforming the resulting blank with an armored surface section, thus producing a near-net-shape work piece contour by means of a process which is selected from the group comprising: forging, upsetting, electro upsetting, and extrusion, at a temperature in one of a cold, half-warm and warm temperature range, thereby producing a near-net-shaped formed armored work piece.2. Process according to claim 1 , wherein the armoring blank comprises a metal which can withstand a higher mechanical load than the basic work piece blank.3. Process according to claim 1 , wherein the armoring blank is formed of a metal that is more chemically resistant than the basic work piece blank.4. Process according to claim ...

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Номер записи: 11
18-07-2013 дата публикации

PISTON WITH ANTI-CARBON DEPOSIT COATING AND METHOD OF CONSTRUCTION THEREOF

Номер: US20130180494A1
Автор: Aharonov Robert R., Matsuo Eduardo
Принадлежит: FEDERAL-MOGUL CORPORATION

A piston and method of construction are provided. The piston includes a piston body having an upper combustion surface configured for direct exposure to combustion gases within a cylinder bore with an undercrown surface located beneath the upper combustion surface. The piston body also includes a ring belt region configured for receipt of at least one piston ring adjacent the upper combustion surface with a cooling gallery configured radially inwardly and in substantial radial alignment with the ring belt region. The piston further includes a non-stick material contained in or bonded to at least one of the undercrown surface and at least a portion of the cooling gallery, wherein the non-stick material inhibits the build-up of carbon deposits thereon. 1. A piston for an internal combustion engine , comprising:a piston body having an upper combustion surface configured for direct exposure to combustion gases within a cylinder bore with an undercrown surface beneath said upper combustion surface and having a ring belt region configured for receipt of at least one piston ring adjacent said upper combustion surface with a cooling gallery configured radially inwardly from said ring belt region and in substantial radial alignment with said ring belt region; anda non-stick material contained in or bonded to the material forming said at least one of said undercrown surface and at least a portion of said cooling gallery, said non-stick material including cobalt.2. The piston of wherein said non-stick material is bonded to said undercrown surface and at least a portion of said cooling gallery.3. The piston of wherein said piston body is constructed as a monolithic piece of material.4. The piston of wherein said cooling gallery is a closed gallery.5. The piston of wherein said non-stick material is selected from the group consisting of: pure cobalt claim 1 , WC—17Co claim 1 , Co—18Cr—30Mo claim 1 , and Co-containing alloys.6. The piston of wherein said piston body includes an ...

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Номер записи: 12
15-08-2013 дата публикации

Method of Producing Piston of Internal Combustion Engine

Номер: US20130205991A1
Автор: Sasaki Masato
Принадлежит: Hitachi Automotive Systems, Ltd.

A method of producing a piston includes a step of producing a naked piston having the skirt portion; a step of forming the skirt portion with streaks; a step of applying a skirt portion of the s naked piston with a first film forming paint which is provided for producing the inner solid lubricant film; a step of heating the first film forming paint on the skirt portion at a temperature of 60° C. to 160° C. for a time less than 800 seconds to dry the same; a step of applying an outer surface of the dried first film forming paint with a second film forming paint which is provided for producing the outer solid lubricant film; and a step of heating the first and second film forming paints on the skirt portion at a temperature of 160° C. to 240° C. for a time of 15 minutes to 180 minutes. 1. A method of producing a piston of an internal combustion engine , the piston having a skirt portion on which inner and outer solid lubricant films are formed as a double layer solid lubricant film , the outer solid lubricant film having a wear resistance lower than that of the inner solid lubricant film , the method comprising:producing a naked piston having the skirt portion;forming the skirt portion with streaks;applying the skirt portion of the naked piston with a first film forming paint which is provided for producing the inner solid lubricant film;heating the first film forming paint on the skirt portion at a temperature of 60° C. to 160° C. for a time less than 800 seconds to dry the same;applying an outer surface of the dried first film forming paint with a second film forming paint which is provided for producing the outer solid lubricant film; andheating the first and second film forming paints on the skirt portion at a temperature of 160° C. to 240° C. for a time of 15 minutes to 180 minutes.2. A method of producing a piston of an internal combustion engine , the piston having a double layer solid lubricant film formed on a skirt portion thereof , the method comprising: ...

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Номер записи: 13
22-08-2013 дата публикации

Hollow gear ring and method for its manufacturing

Номер: US20130213167A1
Автор: Baozhu Liang, Patrik Dahlman
Принадлежит: SKF AB

A welded hollow gear ring ( 160, 260, 360, 460, 560 ) with an outer ( 140, 240, 340 ) and an inner ( 155, 255, 355 ) periphery, which exhibits a gear structure ( 131 - 138, 231 - 238, 331 - 338, 331′ - 338′ ) on at least one periphery, as well as exhibiting at least one welding joint ( 151, 251, 351, 451, 551 ) which has been formed by flash butt welding. The gear structure is formed by rolling, machining, or by a combination of machining and rolling. The gear structure can comprise cogs or helical gears.

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Номер записи: 14
22-08-2013 дата публикации

COOLING DUCT PISTON AND METHOD FOR PRODUCING THE SAME

Номер: US20130213218A1
Автор: Kaiser Timotheus, Pfeifer Hermann, Rehm Wolfgang, Weisskopf Karl
Принадлежит: DAIMLER AG

A cooling duct piston () for combustion engines. The cooling duct piston has a piston basic body () that is connected to a lining part (), which is facing an assigned combustion chamber. Here, the lining part () completely forms the piston surface () of the cooling duct piston () that faces the combustion chamber. An encircling depression () is provided in the surface of the piston basic body () facing the combustion chamber. The lining part () provides a permanent connection at least with the surface of the piston basic body () facing the combustion chamber, and thus bridges the encircling depression (), such that the encircling depression (), with the lining part () that bridges it, forms a cooling duct (). 111-. (canceled)12123334152325536322. A cooling duct piston () for combustion engines , having a piston basic body () that is connected to a lining part () , which lining part () faces an assigned combustion chamber , wherein the lining part () completely forms the piston surface () of the cooling duct piston () facing the combustion chamber , wherein an encircling depression () is provided in the surface of the piston basic body () facing the combustion chamber , wherein the lining part () provides a permanent connection at least to the surface of the piston basic body () facing the combustion chamber , thereby bridging the encircling depression () , such that the circling depression () , with the lining part () that bridges it , forms a cooling duct () , and wherein the material of the lining part () has a higher level of heat conductivity than the material of the piston basic body () and is a ferritic steel , aluminium , or an aluminium alloy and the material of the piston basic body () is an austentic steel.13132. The cooling duct piston () according to claim 12 , wherein the permanent connection is a cast joint claim 12 , which is provided by at least partial moulding of the lining part () into the piston basic body () claim 12 , or a material bond or a ...

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Номер записи: 15
29-08-2013 дата публикации

Method for Producing a Functional Shaft

Номер: US20130220068A1
Автор: Christoph Gremmelspacher, Joachim Echle, Markus Schuler
Принадлежит: Neumayer Tekfor Holding GmbH

A method for producing a functional shaft is provided in which a functional element which is provided with a pocket is inserted into a retaining element, a shaft is inserted into the pocket, and a force applied to the functional element while the shaft is being inserted into the pocket is measured. A device for producing a functional shaft and to a functional shaft produced in accordance with the method is also provided.

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Номер записи: 16
10-10-2013 дата публикации

BEVELOID PLANETARY GEAR DRIVE FOR TRANSFER CASE OR TRANSMISSION

Номер: US20130263452A1
Автор: Fitzgerald Brian, Smith Burke, Wenthen David W.
Принадлежит: Magna Powertrain of America Inc.

A method of assembling a planetary gearset includes die-forming plurality of circumferentially spaced apart teeth on a sun gear, a planet gear an a ring gear. Each tooth includes a pair of tooth flanks in a final net form for engagement with mating gear teeth. The sun gear teeth have a conical shape to allow a first die to linearly move relative to a second die after the gear teeth are die-formed. The planet gears are mounted on a carrier. The sun gear and the planet gear are oriented such that the conical shapes of the respective gear teeth taper in opposite directions from one another and the planet gear teeth meshingly engage with both the ring gear teeth and the sun gear teeth. 1. A method of assembling a planetary gearset , comprising:die-forming a plurality of circumferentially spaced apart teeth on a sun gear, each tooth having a pair of tooth flanks in a final net form for engagement with mating gear teeth, the sun gear teeth having a conical shape to allow a first die to linearly move relative to a second die after the sun gear teeth are die-formed;die-forming a plurality of circumferentially spaced apart teeth on a planet gear, each planet gear tooth having a pair of tooth flanks shaped in a final net form for engagement with mating sun gear tooth flanks, the planet gear teeth having a conical shape to allow a first die to linearly move relative to a second die after the planet gear teeth are die-formed;die-forming a plurality of circumferentially spaced apart teeth on a ring gear, each ring gear tooth having a pair of tooth flanks shaped in a final net form for engagement with mating planet gear tooth flanks, the ring gear teeth having a conical shape to allow a first die to linearly move relative to a second die after the ring gear teeth are die-formed;rotatably mounting the planet gear on a carrier;orienting the sun gear and the planet gear such that the conical shapes of the respective gear teeth taper in opposite directions from one another; ...

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Номер записи: 17
26-12-2013 дата публикации

SYNCHRONIZER RING

Номер: US20130341148A1
Автор: Christoffer Ulf
Принадлежит:

A synchronizer ring () for a synchronizer of a switchable gear changing transmission, includes a ring body () having a synchronizer ring axis (), which ring body has an inner friction surface () and an outer installation surface (), wherein the inner friction surface () and the outer installation surface () bound the ring body () as jacket surfaces. The ring body has an end face () and a gear surface () opposite the end face, wherein the synchronizer ring has a width () which corresponds to the shortest distance between the end face () and the gear surface () and the jacket surfaces extend between the end face () and the gear surface (), wherein the ring body () has a toothed arrangement () which extends radially outwardly from the outer installation surface (), wherein the toothed arrangement has a crown gear () which extends from the gear surface () via a part of the width () of the ring body () in the direction of the end face (), characterized by a recess () which is arranged at the inner friction surface () of the ring body (), so that the radius () of the inner friction surface () in the region of the recess () is larger than the radius () of the inner friction surface () at the end face (), and wherein a bulge () is provided at the outer installation surface () which is arranged in the radial direction over the recess (). 1123454521381513813826598152131042144101241311510. A synchronizer ring () for a synchronizer of a switchable gear changing transmission , including a ring body () having a synchronizer ring axis () , which ring body has an inner friction surface () and an outer installation surface () , wherein the inner friction surface () and the outer installation surface () bound the ring body () as jacket surfaces , wherein the ring body has an end face () and a gear surface () opposite the end face , wherein the synchronizer ring has a width () which corresponds to the shortest distance between the end face () and the gear surface () and the jacket ...

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Номер записи: 18
23-01-2014 дата публикации

Method for manufacturing a variator disc for use in a toroidal continuously variable transmission

Номер: US20140020232A1
Автор: Renato Marchis, Stefano Richaud
Принадлежит: SKF AB

A steel disc blank provides a first face with a concave race, a second face opposite to the first face, a central through bore extending between the first and second face, and an outer peripheral edge; the disc blank is heat-treated; then the bore is turned, thus obtaining at least one cylindrical turned portion of the bore, and then the concave race is turned, holding the disc blank locked on the lathe by means of jaws engaging on the machined cylindrical portion, using this turned cylindrical portion as a reference surface for turning of the concave race.

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Номер записи: 19
13-02-2014 дата публикации

METHOD FOR DETECTING AN ERROR IN THE INSTALLATION OF A SEAL IN A MASTER CYLINDER

Номер: US20140041221A1
Автор: Auguste Antony, Charpentier Carole, Grech Daniel, Lhuillier Laurent, Quiniou Nicolas
Принадлежит:

A method is described for detecting an incorrectly installed seal in a master-cylinder having a seal. The master cylinder is subjected to a pressure comprised between approximately 0.3 and 0.6 MPa at the conclusion of master-cylinder assembly and, if there is a drop in the pressure, the seal is considered to have been installed in reverse in the groove of the master cylinder. 13.-. (canceled)4. A method for detecting an incorrect installation of a master cylinder seal in a motor vehicle brake system , the master cylinder including a body equipped with a bore hole accommodating at least one piston actuated by a driver between a rest position and a braking position and elastically returned to its rest position , wherein: the bore hole is provided with at least one supply chamber connected to a brake fluid reservoir , the piston separates the supply chamber from a pressure chamber connected to a brake circuit , the supply chamber is bordered by two grooves that respectively receive a resupply seal separates the supply chamber from the pressure chamber , and a seal separates the supply chamber from an exterior with respect to a surface of the piston , the seal is a U-shaped peripheral seal , lying flat , a branch of which is applied to a back of a first one of the two grooves , and two adjacent walls to another branch ensures the seal with the piston , the method comprising:after assembly of the master cylinder, subjecting the seal in the master cylinder to a test pressure; andif the pressure drops, considering the seal to have been installed in reverse in the master cylinder.5. The method according to claim 4 , further comprising:testing an installation of seals in the master cylinder by compressed air acting as a fluid.6. The method according to claim 4 , wherein the master cylinder and the seals are subjected to a pressure on the order of 0.3-0.6 MPa. The present invention relates to a method for detecting an error in the installation of a seal in a master cylinder ...

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Номер записи: 20
13-02-2014 дата публикации

DIFFERENTIAL CASE ASSEMBLY WITH DRIVE RING GEAR

Номер: US20140045638A1
Автор: Roscoe Charles S.
Принадлежит:

A differential case assembly, which has a case shoulder and a case outside diameter, is attached to a drive ring gear, which has a gear shoulder and a gear inside diameter. Attachment of the differential case assembly to the drive ring gear is by way of pressing the case outside diameter into intimate contact with the drive ring gear inside diameter around the circumference of the diameters, until the case shoulder comes into intimate mating contact with the gear shoulder, at a joint radius. In addition, hardened dowel pins are tightly fit into joint voids that are formed along the joint radius. The hardened dowel pins are capable of supporting an operational torsional load and the mating shoulders are capable of supporting an operational axial load. 1. A differential case assembly with attached drive ring gear , comprising:a differential case having a case shoulder and a case outside diameter;a drive ring gear having a gear shoulder and a gear inside diameter, the case shoulder in intimate mating contact with the gear shoulder and the case outside diameter in intimate contact with the gear inside diameter at a joint radius, wherein a plurality of joint voids are formed along the joint radius; anda plurality of dowel pins disposed in the plurality of joint voids and capable of supporting an operational torsional load and the intimate mating shoulders capable of supporting an operational axial load.2. The differential case assembly with attached drive ring gear of claim 1 , wherein the case has a case face and the drive ring gear has a gear face claim 1 , the two faces being radially in line with each other so as to form a common flush radially in line surface.3. The differential case assembly with attached drive ring gear of claim 1 , wherein the dowel pins are hardened and each of the joint voids have a depth to allow the dowel pins to be recessed within respective joint voids claim 1 , and the differential case claim 1 , drive ring gear claim 1 , or both have ...

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Номер записи: 21
20-03-2014 дата публикации

Steel piston with counter-bore design

Номер: US20140076264A1
Автор: Airton Martins, Eduardo Matsuo
Принадлежит: Federal Mogul LLC

A piston for an internal combustion engine is provided. The piston includes a piston body which is made of steel. The piston body has a crown portion with an upper combustion surface, a pair of skirts which depend from the crown surface, a pair of pin bosses for receiving a wrist pin and a plurality of pin boss bridges which extend from the pin bosses to the skirts. Each of the pin boss bridges extends axially to a lower end which is opposite of the crown portion and has a rib with an increased thickness at its lower end. At least one of the pin boss bridges has a generally flat counter-bore surface for providing a reference location for machining of the piston body.

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Номер записи: 22
20-03-2014 дата публикации

SMILLED SPLINE APPARATUS AND SMILLING PROCESS FOR MANUFACTURING THE SMILLED SPLINE APPARATUS

Номер: US20140079499A1
Автор: HAYWARD WILLIAM H., PHEBUS DAN E.
Принадлежит: FAIRFIELD MANUFACTURING COMPANY, INC.

By combining shaping and milling actions, or smilling, the cutting tool can move through the entire usable portion of the spline and machine a tool relief into the face of the adjacent feature such as a shoulder before retracting, reversing direction, and repeating the cycle. The smilling apparatus and manufacturing method eliminates the need for an annular spline relief and the full length of spline engagement can be utilized for strength. The effective width of the spline connection apparatus manufactured by the smilling process conserves space and increases the load carrying capability of the spline connection. 124-. (canceled)25. A process for manufacturing an external spline , comprising the steps of:determining the load to be carried by said external spline;selecting a pitch diameter of said external spline based on said determined load;selecting the number of teeth such that the circular pitch is sufficiently large and that said teeth of said external spline are sufficiently large and capable of handling said load;determining a length of said external spline based on said determined load and said selected pitch diameter of said external splines;selecting a tool inclination angle, β;selecting a part space included angle, α;determining a tool cone included angle, 2τ, based on an algorithm expressed in terms of β and α;sizing the tool based on the actual external spline dimensions required;chucking an appropriate workpiece in an endmill;milling, using said tool and an endmill, an appropriate tooth space in said workpiece.26. A process for manufacturing an external spline as claimed in wherein said step of sizing the tool includes forming a cap radius at one end of the tool and establishing a tool length such that the tool cone extends long enough out of said external spline.27. A process for manufacturing an external spline as claimed in claim 25 , wherein said inclination angle claim 25 , β claim 25 , is preferably in the range of 30-60°.28. A process for ...

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Номер записи: 23
01-01-2015 дата публикации

PRODUCTION WASHING ASSEMBLY VERIFICATION SYSTEM AND METHOD

Номер: US20150000128A1
Автор: Kenworthy Matthew
Принадлежит:

A master verification assembly includes a plurality of plunger devices. Each of the plunger devices includes a piston that is axially moveable between a raised position and a depressed position. When placed in a washing assembly, each of the plunger devices is aligned with a nozzle. The nozzles dispense a cleaning fluid under pressure. An axial force applied by the dispensed cleaning fluid depresses the pistons into the depressed position, whereupon the pistons disposed in the depressed position are axially secured in an indicator position. Upon removal of the master verification assembly from the washing assembly, depressed pistons in the indicator position indicate proper function of the nozzles, whereas pistons disposed in the raised position indicate improperly functioning nozzles. 1. A method of verifying proper functionality of a washing assembly of a part washing system for washing parts along a production line , the method comprising;positioning a master verification assembly within the washer assembly such that each of a plurality of nozzles in the washer assembly align with one of a plurality of plunger devices disposed on the master verification assembly;dispensing a cleaning fluid under pressure through each of the nozzles, whereupon each of the plunger devices includes a piston that is moveable from a raised position into a depressed position in response to an axial force having a magnitude greater than a pre-defined value applied by the dispensed cleaning fluid onto the piston;securing each of the pistons moved into the depressed position by the dispensed cleaning fluid in an indicator position;sensing a position of each of the pistons to determine if the piston is disposed in the raised position or in the indicator position, wherein each piston disposed in the indicator position indicates that the nozzle associated with that piston is properly aligned and dispensing cleaning fluid at a proper pressure, and wherein each piston disposed in the raised ...

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Номер записи: 24
01-01-2015 дата публикации

METHOD FOR MANUFACTURING PISTON OF AUTOMOBILE ENGINE

Номер: US20150000129A1
Автор: Jang Pil Sung
Принадлежит:

A method for manufacturing a piston can prevent casting defects such as oxide inclusions or shrinkage cavities on the surface of a combustion chamber over a piston head after casting. The method includes casting a head top having a bowl by pouring a first molten metallic material into a first mold with a bonding portion of the head top to be formed at an upper portion in the first mold and a first riser on the bonding portion of the head top, casting the body by pouring a second molten metallic material into a second mold, with a bonding portion of the body to be formed at an upper portion in the second mold and a second riser on the bonding portion of the body, removing the risers from the head top and the body, and integrally bonding the head top and the body to form the piston. 1. A method for manufacturing a piston of an automobile engine , the method comprising:casting a head top having a bowl by pouring a first molten metallic material into a first mold, with a bonding portion of the head top to be formed at an upper portion in the first mold and a first riser on the bonding portion of the head top;casting the body, which is a part of the piston excluding the head top, by pouring a second molten metallic material into a second mold, with a bonding portion of the body to be formed at an upper portion in the second mold and a second riser on the bonding portion of the body;removing the risers from the head top and the body; andintegrally bonding the head top and the body at the bonding portions of the head top and the body, thereby forming the piston.2. The method of claim 1 , further comprising:machining at least one of the bonding portions of the head top and the body to form a flat bonding side on the at least one of the bonding portions, wherein the machining is performed after the riser or risers are removed.3. The method of claim 2 , wherein the removing of risers and the machining of at least one of the bonding portions are performed by turning.4. The ...

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Номер записи: 25
01-01-2015 дата публикации

BLANK AND METHOD OF MANUFACTURING RACK SHAFT USING THE SAME

Номер: US20150000135A1
Автор: OUMI Hiroyuki
Принадлежит: JTEKT CORPORATION

A blank is provided with a first shaft portion, a second shaft portion, and a machining target portion. The machining target portion is formed at a position closer to a shaft end portion of the first shaft portion than a shaft end portion of the second shaft portion. A first large-volume portion is formed at the first end portion of the machining target portion close to the first shaft portion, and a second large-volume portion is formed at the second end portion of the machining target portion close to the second shaft portion, respectively. The volumes per unit length of the first and second large-volume portions are greater than the volume per unit length of the intermediate portion in the axial direction of the machining target portion. Furthermore, the volume of the second large-volume portion is greater than the overall volume of the first large-volume portion. 1. A blank that is equipped with a first shaft portion , a second shaft portion , and a machining target portion , which is provided between the first shaft portion and the second shaft portion , whereinthe blank includes a plurality of rack teeth,the rack teeth are molded on the machining target portion and aligned in an axial direction of the blank,a volume per unit length of at least one of a first end portion of the machining target portion, which is close to the first shaft portion, and a second end portion of the machining target portion, which his close to the second shaft portion, is greater than a volume per unit length of an intermediate portion in the axial direction of the machining target portion.2. The blank according to claim 1 , whereinthe machining target portion is formed at a position closer to a shaft end portion of the first shaft portion than a shaft end portion of the second shaft portion,a first large-volume portion is formed at the first end portion of the machining target portion,a second large-volume portion is formed at the second end portion of the machining target portion, ...

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Номер записи: 26
03-01-2019 дата публикации

GEAR MANUFACTURING METHOD AND GEAR MANUFACTURED THEREBY

Номер: US20190001397A1
Автор: Lee Kwang Hui
Принадлежит:

A gear manufacturing method includes a step of preparing a gear blank; a step (teeth cutting step) of cutting the gear blank to form a half-finished gear having a plurality of gear teeth; a step (heat treatment step) of heat-treating the half-finished gear having the gear teeth; and a step (form rolling step) of rolling the half-finished gear which is subjected to the heat treatment, in which the gear teeth of the half-finished gear which is subjected to the teeth cutting step is formed with protuberances on both sides in a circumferential direction, and at the form rolling step, the protuberances are pressed by a rolling die, so that the half-finished gear becomes a gear. 1. A gear manufacturing method comprising:a step of preparing a gear blank;{'b': 110', '20', '21, 'a step (teeth cutting step; ST-) of cutting the gear blank to form a half-finished gear () having a plurality of gear teeth ();'}{'b': '120', 'a step (heat treatment step; ST-) of heat-treating the half-finished gear having the gear teeth; and'}{'b': '130', 'a step (form rolling step; ST-) of rolling the half-finished gear which is subjected to the heat treatment,'}{'b': 21', '20', '28', '130', '28, 'in which the gear teeth () of the half-finished gear () which is subjected to the teeth cutting step is formed with protuberances () on both sides in a circumferential direction, and at the form rolling step (ST-), the protuberances () are pressed by a rolling die, so that the half-finished gear becomes a gear.'}228. The gear manufacturing method according to claim 1 , wherein the protuberance () has the maximum thickness at a portion corresponding to a pitch circle claim 1 , and the thickness is gradually decreased toward an addendum circle and a dedendum circle.32828. The gear manufacturing method according to claim 1 , wherein the gear is an involute gear claim 1 , the protuberance () is provided in a range of an addendum circle and a dedendum circle claim 1 , and the protuberance () has the maximum ...

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Номер записи: 27
04-01-2018 дата публикации

Method of reducing required machining on a pin type carrier

Номер: US20180003288A1
Автор: Jeremy L. Cummings, Luke A. Rippelmeyer
Принадлежит: Toyota Motor Engineering and Manufacturing North America Inc

A method of reducing the required machining on a pin type carrier, such as a planetary gear carrier, may utilize a combined drilling and milling operation to reduce the required machining. A hole in a surface may be formed during the drilling operation and the surface may be machined to a desired level during the milling operation. A tool having a leading drill feature and a trailing mill feature may be used to sequentially form the hole and mill the surface in a single operation.

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Номер записи: 28
03-01-2019 дата публикации

MONOLITHIC, GALLERYLESS PISTON AND METHOD OF CONSTRUCTION THEREOF

Номер: US20190003418A1
Автор: Riffe Jeff, Weinenger Michael
Принадлежит:

A galleryless piston for an internal combustion engine is provided. The piston has a monolithic piston body including an upper wall forming an upper combustion surface with first and second portions. The first portion extends annularly along an outer periphery of the upper wall and the second portion includes a combustion bowl. The first portion can also include valve pockets formed therein to reduce weight. The upper wall has an undercrown surface directly opposite the second portion of the upper combustion surface. To enhance cooling, a center portion of the undercrown surface is concave, such that oil is channeled during reciprocation of the piston from one side to the opposite side of the piston. The concave center portion is axially offset from the surrounding area of the undercrown surface. 1. A piston for an internal combustion engine , comprising:a piston body extending along a central longitudinal axis;said piston body having an upper wall forming an upper combustion surface with a ring belt region depending from said upper combustion surface;said upper combustion surface having first and second portions, said first portion extending along an outer periphery of said upper wall and said second portion extending radially inwardly from said first portion;said upper wall having an undercrown surface formed on an underside thereof, said undercrown surface being located opposite said second portion of said upper combustion surface;said piston body including a pair of skirt portions depending from said ring belt region;said piston body including a pair of pin bosses spaced from one another by said skirt portions, each of said pin bosses including an inner surface facing toward said central longitudinal axis and an outer surface facing away from said central longitudinal axis, and each of said pin bosses providing a pin bore extending continuously from said inner surface to said outer surface;said piston body being free of a cooling gallery along said undercrown ...

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Номер записи: 29
14-01-2016 дата публикации

SUPPORT RAIL AND SWING GEAR ASSEMBLY FOR A MINING VEHICLE

Номер: US20160010309A1
Автор: Bienfang David T., Bumraw Gurbachan S., Gilmore Carl D., Strydom Philip R., Wanasek Christopher R., Yaunke Jeanne
Принадлежит:

A support rail for a swing gear assembly having a thrust rail coupled to a swing gear includes a substantially horizontal first surface configured to be coupled to the swing gear such that the first surface engages a substantially horizontal top face of the swing gear, and a substantially vertical second surface intersecting the substantially horizontal first surface such that the second surface is substantially perpendicular to the first surface. The second surface is configured to engage a substantially vertical face of the thrust rail when the first surface is coupled to the swing gear. The first surface and the second surface are configured to inhibit a rotation of the thrust rail relative to the swing gear by engaging the top face of the swing gear and the vertical face of the thrust rail simultaneously. 1. A support rail for a swing gear assembly having a thrust rail coupled to a swing gear , the support rail comprising:a substantially horizontal first surface configured to be coupled to the swing gear such that the first surface engages a substantially horizontal top face of the swing gear; anda substantially vertical second surface intersecting the substantially horizontal first surface such that the second surface is substantially perpendicular to the first surface, wherein the second surface is configured to engage a substantially vertical face of the thrust rail when the first surface is coupled to the swing gear, and wherein the first surface and the second surface are configured to inhibit a rotation of the thrust rail relative to the swing gear by engaging the top face of the swing gear and the vertical face of the thrust rail simultaneously.2. The support rail of claim 1 , wherein the first surface and the second surface are configured to inhibit a rotation of the thrust rail about the top face of the swing gear when the support rail is coupled to the swing gear claim 1 , such that a bending moment applied to the swing gear is inhibited.3. The support ...

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Номер записи: 30
10-01-2019 дата публикации

COUNTERBALANCE GEAR WITH SHOT DAMPER

Номер: US20190011014A1
Автор: Zouani Abdelkrim
Принадлежит:

An engine system has a crankshaft gear coupled to an engine crankshaft and a balance gear coupled to a balance shaft. The balance gear is formed by a disc having first and second opposite sides and a series of teeth. A first sector of the disc has at least one aperture therethrough, and a second opposite sector of the disc defines a recess intersecting the first side. The balance gear has a damper formed by a cover plate connected to the first side to enclose the recess and contain a plurality of particles therein. A gear and a method of forming a gear is also provided, with the gear having a first sector defining at least one aperture therethrough and a second sector defining a recess intersecting the first side. A plurality of particles are positioned in the recess, and a cover plate encloses the recess to form a damper. 1. An engine system comprising:a crankshaft gear coupled to a crankshaft of an engine for rotation therewith; anda balance gear coupled to a balance shaft for rotation therewith, the balance gear and crankshaft gear in meshed engagement, the balance gear formed by a disc having first and second opposite sides extending radially outwardly to a circumferential edge defining a series of teeth, a first sector of the disc having at least one aperture therethrough, and a second opposite sector of the disc defining a recess intersecting the first side, the balance gear having a damper comprising a cover plate connected to the first side of the disc to enclose the recess and contain a plurality of particles therein.2. The engine system of wherein the balance gear is eccentrically weighted by the damper and the at least one aperture.3. The engine system of wherein the balance shaft has an eccentric weight connected thereto for rotation therewith; andwherein the damper of the balance gear is radially opposite to the eccentric weight.4. The engine system of further comprising a sealing member positioned between the cover plate and the disc to seal the recess ...

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Номер записи: 31
03-02-2022 дата публикации

METHOD FOR PRODUCING A PISTON

Номер: US20220032371A1
Автор: MANGOLD SEBASTIAN, Schmieder Benjamin
Принадлежит:

The present invention relates to a method for producing a piston () for an internal combustion engine from a piston upper part () and a piston lower part (). 1. A method for producing a piston for an internal combustion engine , the method comprising:producing a piston upper part including a piston top, at least part of a ring section, and at least part of a cooling channel;producing a piston lower part and closing the part of the cooling channel arranged in the piston upper part via an additive method; 'wherein finish-machining the piston includes producing at least one annular groove in a ring support for receiving a piston ring.', 'finish-machining the piston; and'}2. The method according to claim 1 , wherein producing the upper piston part includes at least one of forging and casting the ring support into the piston upper part claim 1 , and wherein the ring support forms the annular groove.3. The method according to claim 1 , further comprising claim 1 , prior to producing the piston lower part via the additive method claim 1 , facing the piston upper part at least on a side facing the piston lower part.4. The method according to claim 1 , wherein producing the piston lower part via the additive method includes forming a second part of the cooling channel in a region of the piston lower part claim 1 , the second part of the cooling channel having a rougher surface than the part of the cooling channel arranged in the piston upper part claim 1 , wherein the rougher surface of the second part of the cooling channel is produced via the additive method.5. The method according to claim 1 , wherein the cooling channel has a non-rotationally symmetrical shape with respect to at least one of a piston vertical axis and a piston transverse axis.6. The method according to claim 1 , wherein producing the piston lower part via the additive method includes producing claim 1 , via the additive method claim 1 , a second part of the cooling channel in a region of the piston lower ...

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Номер записи: 32
22-01-2015 дата публикации

Method for assembling a helically geared first sprocket and a second helically geared sprocket to form a transmission

Номер: US20150020387A1
Автор: Marcel Broghammer, Martin Obergfoell
Принадлежит: IMS Gear SE and Co KGaA

A method for assembling a helically geared first sprocket, particularly a worm gear and a second sprocket arranged on an axis, particularly a worm, to form a transmission, particularly a worm drive, in which the first sprocket is positioned coaxially in reference to an axis of assembly of the first sprocket, aligned at a 90° position in reference to the axis via an assembly device.

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Номер записи: 33
10-02-2022 дата публикации

PROCESSING METHOD OF CYLINDER HEAD FOR MULTI-CYLINDER ENGINE

Номер: US20220040809A1
Автор: Aoki Yuto, Enomoto Tomoaki, HAYASHI Kazuya, SHIMIZU Keita, Takahashi Hirokazu, Yamaoka Hajime
Принадлежит:

A processing method of a cylinder head for a multi-cylinder engine includes a step of fixing the cylinder head to a fixing jig of a machining apparatus in a longitudinal placement posture in which a plurality of recesses are arrayed vertically, the plurality of recesses configuring portions of combustion chambers of respective cylinders, a step of calculating inclination information of the cylinder head in the longitudinal placement posture by measuring relative positions of at least two recess reference surfaces among recess reference surfaces which are respectively formed in the plurality of recesses, a step of correcting a recess processing condition by a tool of the machining apparatus, the recess processing condition being defined in advance, based on the calculated inclination information, and a step of processing respective inner walls of the plurality of recesses by the tool of the machining apparatus based on the corrected recess processing condition. 1. A processing method of a cylinder head for a multi-cylinder engine , in which the cylinder head is processed by a machining apparatus , the cylinder head being used for a multi-cylinder engine having a plurality of cylinders and having a plurality of recesses configuring portions of combustion chambers of the respective cylinders , the processing method comprising:a step of fixing the cylinder head to a fixing jig of the machining apparatus in a longitudinal placement posture in which the plurality of recesses are arrayed in an up-down direction;a step of calculating inclination information of the cylinder head in the longitudinal placement posture by measuring relative positions of at least two recess reference surfaces among recess reference surfaces which are respectively formed in the plurality of recesses in a state where the cylinder head is fixed to the fixing jig;a step of correcting a recess processing condition by a tool of the machining apparatus, the recess processing condition being defined in ...

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Номер записи: 34
28-01-2016 дата публикации

TWO-PIECE PISTON FOR INTERNAL COMBUSTION ENGINE (DOUBLE JOINED)

Номер: US20160025034A1
Автор: Lormes Klaus
Принадлежит:

A piston in particular, a gallery cooled piston, of an internal combustion engine, includes at least one bottom part and at least one top part wherein the at least two piston parts have geometries which correspond in a connecting region in order to bring about a positively locking connection. A method for producing such a piston. 1. A piston for an internal combustion engine comprising at least one lower part and at least one upper part , characterized in that the at least two piston parts have matching geometries in a connecting area to effect a positive-locking joint.2. The piston from claim 1 , wherein:matching geometries are configured as a groove and a tongue.3. The piston from claim 2 , whereinthe tongue has the profile of a tongue matching the groove at least after the joining process.4. The piston from claim 2 , wherein:the groove in cross-section has a negative profile of a dovetail profile.5. The piston claim 2 , wherein:the tongue at least following the joining process, has a dovetail profile in cross-section.6. The piston from claim 1 , wherein:the at least one lower part and the at least one upper part are permanently and inseparably connected following completion of the positive-locking procedure.7. A method for producing a positive-locking connection between a lower part and an upper part of a piston claim 1 , for an internal combustion engine claim 1 , characterized in producing the positive-locking connection in one procedural step using a joining device.8. The method from claim 7 , wherein:heating at least one of the at least one upper part and the at least one lower part prior to joining to a higher temperature than ambient temperature.9. The method from claim 8 , wherein:forming matching geometries of the at least one upper part and the at least one lower part as a tongue and a groove, and wherein the tongue assumes the shape of the groove during the joining process.10. The method from claim 8 , wherein:creating an inseparable positive locking ...

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Номер записи: 35
24-01-2019 дата публикации

Piston Having Three Ring Grooves And A Further Groove Having A Joint

Номер: US20190022739A1
Автор: Fahr Matthias, Müller Gregor, Ottliczky Emmerich, Stier Ralf
Принадлежит:

A method for producing a cooling duct piston for an internal combustion engine having a cooling duct in its piston crown. A piston main body is produced with a collar which is circumferential and projects radially in the region of the piston crown. The collar is formed until its outer circumferential edge comes very closely or completely into contact with a bearing region of the piston lower part forming the cooling duct. At least one ring groove is introduced. A ring-free groove is further formed below the ring groove, wherein a dividing plane lies between the outer circumferential edge of the formed collar and an upper side of the piston lower part in the ring-free groove. 1. A method for producing a cooling duct piston for an internal combustion engine , which cooling duct piston has a cooling duct in a piston crown , wherein the piston crown is adjoined by a piston lower part having piston bosses , pin bores and piston skirts , wherein a piston main body is firstly produced with a collar which is circumferential and projects radially in the region of the piston crown , wherein the collar is formed in such a manner until an outer circumferential edge is positioned in one of very closely or completely into contact with a bearing region of the piston lower part , in order to form the cooling duct , and subsequently at least one ring groove is formed in the collar , characterized in that a ring-free groove is formed in the collar below the at least one ring groove , wherein a dividing plane lies in the ring-free groove between the outer circumferential edge of the formed collar and an upper side of the piston lower part.2. The method of claim 1 , wherein the outer circumferential edge is positioned very closely to the bearing region claim 1 , and wherein the collar is configured and formed in such a manner that in the region of the dividing plane between the outer circumferential edge of the formed collar and an upper side of the piston lower part a gap is created.3 ...

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Номер записи: 36
24-01-2019 дата публикации

Method of Designing and Producing High Performance Carbon Ceramic Pistons

Номер: US20190022805A1
Автор: Gill Bryan
Принадлежит:

A method is provided of designing and producing a piston using chopped carbon ceramic pre-impregnated composite material, wherein the method allows piston designers to produce a fiber/composite preform, then machine any of several different piston designs, diameters, with different ring and chamber designs or dimensions and dimensional offsets. The piston preform is shaped in a basic form, and then machined into a piston that fits a specific engine. After the specific machining is performed, the pin bosses are bored and fitted with bronze inserts; ring lands are cut, skirts are shaped, finish machining is performed on all surfaces. Pistons are preferably then plated to seal carbon ceramic based materials, and the skirts as well as regions that engage in part-to-part moving contact, are plasma coated with anti-friction material(s). The skirts may be made as a separate skirt preform which is fitted, machined or cut to fit the specific piston. The overall process is adapted to skirt regions of differing size, length or offset that are assembled into a unitary structure of improved strength/weight characteristics. The method is useful for making high-performance engine modification parts having high strength and reduced inertial mass 1. A method of designing and producing fully plated composite pistons using a carbon based composite material , comprising the steps of:Choosing one or a plurality of piston designs;Overlaying said piston designs to determine a single piston blank design;Creating a reverse mold of said piston blank design;Compression molding a piston blank using said reverse mold; andMachining said piston blank into one of said piston designs.2. The method of claim 1 , wherein said choosing said piston designs further comprises the steps of:Determining diameter, combustion surface, and ring package if necessary of said piston designs prior to overlaying said piston designs.3. The method of claim 1 , wherein compression molding said piston blank further ...

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Номер записи: 37
24-01-2019 дата публикации

PISTON FOR INTERNAL COMBUSTION ENGINES AND METHOD FOR PRODUCING PISTON FOR INTERNAL COMBUSTION ENGINES

Номер: US20190024605A1
Автор: IIZUKA Tateoki
Принадлежит:

This piston for internal combustion engines, which is capable of achieving high heat shielding properties and high durability, comprises: a base that is formed from aluminum or an aluminum alloy; a composite material part which is formed in a first region of the surface of the base, and which is formed from a composite material that is reinforced with inorganic fibers or whiskers; and an alumite coating film that is formed on the composite material part and a second region of the surface of the base, said second region being different from the first region. 1. An internal-combustion-engine piston , comprising:a base material formed from aluminum or an aluminum alloy;a composite material portion formed in a first region of a surface of the base material from a composite material reinforced by an inorganic fiber or a whisker; andan anodized aluminum coating formed on the composite material portion and in a second region of the surface of the base material, the second region being different from the first region.2. The internal-combustion-engine piston according to claim 1 , whereinthe second region includes a surface lower in a height direction than a surface of the composite material portion formed in the first region, the height direction being orthogonal to the surface of the composite material portion.3. The internal-combustion-engine piston according to claim 2 , whereina part of the anodized aluminum coating formed in the second region includes a surface at the same position in the height direction as a surface of a part of the anodized aluminum coating formed on the composite material portion.4. A method for producing an internal-combustion-engine piston claim 2 , the method comprising:forming a base material from aluminum or an aluminum alloy;forming a composite material portion in a first region of a surface of the base material from a composite material reinforced by an inorganic fiber or a whisker; andforming an anodized aluminum coating on the composite ...

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Номер записи: 38
24-01-2019 дата публикации

TRANSMISSION DEVICE FOR SPLITTING TORQUE BETWEEN TWO COAXIAL GEARS, IN PARTICULAR FOR A PLANETARY GEARING FOR AERONAUTIC APPLICATIONS, AND METHOD FOR MANUFACTURING AND ASSEMBLING SAID TRANSMISSION DEVICE

Номер: US20190024755A1
Автор: FACCHINI Marco, GRAVINA Michele
Принадлежит:

A transmission device for splitting torque between two coaxial gears, in particular for a planetary gearing for aeronautic applications, has a motion input member and two transmission members, which are coaxial and have respective shafts provided with gears at an axial end and respective external flanges, at the opposite axial end; the two flanges are axially facing and placed abutting against each other, and are fixed to the motion input member so as to split the torque transmitted from the motion input member between the two flanges; one of the two shafts is axially hollow and houses, with radial clearance, an intermediate portion of the other shaft; the latter is formed by at least two pieces which are coaxial and fixed to each other. 1. A transmission device for splitting torque between two coaxial gears , in particular for a planetary gearing for aeronautic applications , the device comprising:a motion input member;a first and a second transmission member, which are coaxial to each other and to said motion input member along a longitudinal axis and comprise:a) a first and, respectively, a second shaft having a first gear and, respectively, a second gear at an axial end;b) a first and, respectively, a second flange, which radially protrude outwards from said first and second shafts, at an axial end opposite to said first and second gears, are axially facing and placed abutting against each other, and are fixed to said motion input member so as to split the torque transmitted from said motion input member between said first and second flanges;said second shaft being axially hollow; said first shaft comprising a first intermediate portion having an outside diameter smaller than the inside diameter of said second shaft and housed in said second shaft with radial clearance;wherein that said first shaft is formed by at least two pieces which are coaxial and fixed to each other.2. The device according to claim 1 , wherein said two pieces are welded to each other.3. ...

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Номер записи: 39
29-01-2015 дата публикации

DRIVE HUB FOR PLANET PINION CARRIER FREENESS CHECK

Номер: US20150031499A1
Автор: Wischerath Wayne M.
Принадлежит: FORD GLOBAL TECHNOLOGIES, LLC

An assembly includes a sun gear that includes a external gear teeth and internal axial spline teeth, a drive hub including a first sleeve portion formed with lateral holes, and insert assemblies, each insert assembly including a sleeve located in one of the holes and secured to the first sleeve portion, a plunger located in the sleeve for displacement along the sleeve, and a spring urging the plunger laterally outward toward engagement with the spline teeth. 1. An assembly , comprising:a sun gear that includes an external gear teeth and internal axial spline teeth;a drive hub including a first sleeve portion formed with lateral holes;an insert, each insert including a sleeve located in one of the holes and secured to the first sleeve portion, a plunger located in the sleeve, and a spring urging the plunger laterally outward toward engagement with the spline teeth.2. The assembly of claim 1 , wherein:each of the holes formed with an internal screw thread; andeach of the inserts formed with an external screw thread engaged with one of the internal screw threads.3. The assembly of claim 1 , wherein the drive hub further comprises:a second sleeve portion secured to the first sleeve portion and formed with a chamfer located at an axial end of the second sleeve portion.4. The assembly of wherein the first and second sleeve portions each have the form of a right circular cylindrical sleeve.5. The assembly of claim 1 , wherein the plunger includes a convex spherical surface located at a lateral outer end.6. The assembly of claim 1 , wherein:the sun gear further includes a first chamfer located at axial end of the spline teeth; andthe drive hub includes a second chamfer located at an axial end of the first sleeve portion for piloting the drive hub axially into the spline teeth.7. An assembly claim 1 , comprising:a drive hub including a first sleeve portion formed with lateral holes;inserts, each insert including a sleeve located in one of the holes and secured to the first ...

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Номер записи: 40
01-02-2018 дата публикации

Method for repairing the teeth of a ring gear

Номер: US20180029174A1
Автор: David Kotrys, Francois BOUDOT, Olivier Vanlerenberghe
Принадлежит: Fives FCB SA

Method for repairing the teeth of a toothed ring gear, the method using a removable machining device, including a frame and a part moving with respect to the frame, supporting a cutting member, the method including: attaching the machining device to the toothed ring gear by tightening the machining device onto the ring gear in an attachment position on the ring gear with respect to the tooth to be machined; machining the tooth in an automated manner by control of the cutting organ following predetermined machining operations, in which the machining device is moved from an attachment position on the toothed ring gear corresponding to the previously machined tooth, to an attachment position of a neighboring tooth to be machined, while the toothed ring gear is stationary, the machining device being suspended and held by at least one tensioned cable connected to the frame of the rotating machine.

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Номер записи: 41
17-02-2022 дата публикации

Method of Designing and Producing Fiber-Reinforced Polymer Pistons

Номер: US20220048146A1
Автор: Gill Bryan, Guo Aaron, Lieu Brennan C.
Принадлежит: AWA Forged Composites, LLC

A method is provided for designing and producing fiber-reinforced polymer (FRP) pistons. Pistons made with FRP have a lower mass than prior art metal pistons conferring advantageous engine efficiency and stability. FRP pistons also increase the thermal efficiency of engines by having a lower thermal conductivity, with tighter piston-to-bore clearance, and/increased air-fuel ratio than pistons of metal. The technical parameters of the piston are identified, and a piston body blank is produced. The blank is then machined, a bearing surface for the pin bore is created, the piston blank is optionally coated, is optionally subjected to Heavy Metal Ion Implantation (HMII) treatment and is subjected to sodium silicate impregnation to produce the final pistons. 1. A method for manufacturing at least one fiber-reinforced polymer piston , the method comprising:determining at least one dimension of the at least one fiber-reinforced polymer piston selected from: dome area, piston ring lands, pin bore area, skirt area, for designing and producing a piston body blank comprising at least 50% fiber-reinforced polymer by volume;machining the piston body blank for integral parts of the piston to obtain a piston blank;generating a bearing surface for a pin bore in the piston blank, the bearing surface having a surface roughness of 0-32 Ra;finishing the piston blank to obtain the fiber-reinforced polymer piston; andimpregnating the piston with sodium silicate impregnation.2. The method according to claim 1 , producing the piston body blank further comprises building a one-piece claim 1 , a two-piece claim 1 , or a three-piece piston body blank.3. The method according to claim 2 , producing the piston body blank by at least one process selected from: contour compression molding; injection molding; over mold injection molding; manufacturing a standard FRP Billet Rod; and resin injection molding; or alternatively creating a standard FRP Billet Rod and machining the standard FRP Billet rod ...

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Номер записи: 42
01-02-2018 дата публикации

RACK BAR AND METHOD FOR MANUFACTURING RACK BAR

Номер: US20180031104A1
Автор: SUNAGA Norimasa, YAMAWAKI Takashi
Принадлежит: NETUREN CO., LTD.

A rack bar includes a shaft member having a toothed section. The toothed section has a plurality of rack teeth, and extends over a portion of an entire length of the shaft member along a longitudinal direction of the shaft member. The shaft member has a grinding-finished outer peripheral surface extending over the entire length of the shaft member including the toothed section. A method for manufacturing the rack bar includes forming the toothed section by plastic working and grinding the outer peripheral surface to improve shape accuracy. 1. A rack bar comprising a shaft member , wherein the shaft member comprises:a plastically formed toothed section having a plurality of rack teeth, the toothed section extending over a portion of an entire length of the shaft member along a longitudinal direction of the shaft member; anda grinding-finished outer peripheral surface extending over the entire length of the shaft member including the toothed section.2. The rack bar according to claim 1 , further comprising an extension shaft member joined to one end of the shaft member coaxially with the shaft member.3. A method for manufacturing a rack bar claim 1 , comprising:forming a toothed section having a plurality of rack teeth by a plastic working over a portion of an entire length of the shaft member along a longitudinal direction of the shaft member; andgrinding an outer peripheral surface of the shaft member over the entire length of the shaft member including the toothed section.4. The method according to claim 3 , wherein the plastic working comprises forming the toothed section to have an outer diameter that includes a grinding margin to be ground in the grinding.5. The method according to claim 3 , further comprising joining claim 3 , after the grinding claim 3 , an extension shaft member to one end of the shaft member coaxially with the shaft member.6. The method according to claim 5 , wherein the grinding comprises grinding the outer peripheral surface of the shaft ...

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Номер записи: 43
31-01-2019 дата публикации

MACHINING SYSTEM, APPARATUS AND METHOD

Номер: US20190030660A1
Автор: Wern Michael J.
Принадлежит:

A method and apparatus for processing a metallic workpiece with defined edges (e.g., a gear) comprises media blasting of the workpiece by directing a first media against exposed surfaces on the workpiece to increase the root strength of the gear, the blasting causing the defined edges to be radiused or mushroomed, ceasing the media blasting, loading the workpiece into a finishing apparatus, and subjecting the workpiece to a finishing process with a second media, the exposed surfaces on the workpiece being subjected to the finishing process to reduce the radiused edges on the workpiece created from the media blasting. The process of moving the workpiece to the spindle-finishing apparatus from the media blasting may be performed automatically by a machine. Once the workpiece has been subjected to the finishing process with the second media, it may be removed from the spindle-finishing machine, washed, and rinsed with rust inhibitor whereby wear properties of the workpiece are enhanced. 120-. (canceled)21. An apparatus for processing a workpiece having one or more defined edges , the one or more defined edges having a cross-sectional shape that includes at least one tip , the apparatus comprising:a media blasting apparatus configured to subject the workpiece to a media blasting process with a first media and forming the tip of the one or more defined edges into a radiused tip having a first width; anda finishing apparatus configured to subject the workpiece to a finishing process after the media blasting process, the finishing process comprising vibrating a second media to wear down the radiused tip such that the width of the radiused tip becomes a second width, wherein the second width is less than the first width.22. The apparatus of claim 21 , wherein the workpiece comprises one or more teeth claim 21 , and wherein the one or more defined edges are located on a tip of the one or more teeth.23. The apparatus of claim 22 , wherein the workpiece is a gear.24. The ...

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Номер записи: 44
08-02-2018 дата публикации

HOLLOW PISTON

Номер: US20180038482A1
Автор: Brunner Gary Wayne, Moser Shawn Gene, Thomson David Dee
Принадлежит:

Disclosed are hollow pistons made from a single piece of starting material and methods of manufacturing hollow pistons from the single piece of starting material. 1. A computer-implemented method for manufacturing unitary hollow pistons comprising:(a) receiving instructions to concurrently manufacture, from a single solid rod, two unitary hollow pistons linked by a connecting strip; and (i) providing a solid rod;', '(ii) cutting, one or more notches mid-span along the solid rod to produce a notched rod;', '(iii) heating the notched rod;', '(iv) pressing opposing ends of the notched rod to produce hollow cylindrical bodies;', '(v) folding an outer portion of each hollow cylindrical body inward to produce the two unitary hollow pistons linked by the connecting strip; and', '(vi) separating the hollow pistons from one another., '(b) performing, according to the instructions, the steps of2. The computer-implemented method of claim 1 , further comprising the steps of:measuring, under control of a computerized system, attributes of the pistons; andanalyzing, under control of the computerized system, measurements to determine whether the attributes comply with a specification stored in the computerized system.3. The computer-implemented method of claim 2 , further comprising the steps of:identifying, under control of the computerized system, one or more corrective actions; andinstructing manufacturing equipment to implement one or more of the corrective actions.4. The computer-implemented method of claim 1 , further comprising the steps of:centering and smoothing the hollow cylindrical bodies.5. The computer-implemented method of claim 1 , wherein at least one notch is curvilinear.6. The computer-implemented method of claim 1 , wherein at least one notch is rectangular.7. The computer-implemented method of claim 1 , wherein at least one of the notches is a groove extending around the circumference of the notched rod.8. The computer-implemented method of claim 1 , wherein ...

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Номер записи: 45
24-02-2022 дата публикации

METHOD FOR PRODUCING A GEAR WORM WHICH IS LOCATED IN PARTICULAR ON AN ARMATURE SHAFT, AND SUCH A GEAR WORM

Номер: US20220055092A1
Автор: Bao Jie, Cettier Daniel, De Graaff Bernhard, Hertweck Volker, Hertwig Otmar, Qiao Guang, Thoene Holger
Принадлежит:

The invention relates to a method for producing a gear worm () which is located in particular on an armature shaft () of an electromotive drive unit (), wherein firstly a worm gear () having screw flanks () axially opposite one another on a longitudinal axis () is formed by means of a rolling tool, and subsequently a groove structure () which is concentric about the longitudinal axis () is formed on the screw flanks () by means of an additional process step. The invention also relates to a gear worm () produced according to the method according to the invention, and to a transmission drive unit () containing such a gear worm (). 112. A method for producing a gear worm () , the method comprising{'b': ['20', '22', '18'], '#text': 'forming, with a roller burnishing tool, a worm toothing system () with worm flanks () which lie axially opposite one another on a longitudinal axis (), and'}{'b': ['22', '24', '18'], '#text': 'thereafter configuring on the worm flanks () a groove structure () which is concentric about the longitudinal axis ().'}224. The method as claimed in claim 1 , characterized in that the concentric groove structure () is produced by belt grinding.330302232. The method as claimed in claim 2 , characterized in that a flexible grinding belt () is used for the belt grinding claim 2 , which flexible grinding belt () is pressed against the worm flanks () by a profiled contact piece ().424. The method as claimed in claim 1 , characterized in that the concentric groove structure () is produced by a stationary grinding block.51230322220. The method as claimed in claim 3 , characterized in that claim 3 , during the belt grinding claim 3 , the gear worm () is set in rotation claim 3 , and the grinding belt () is pulled with the contact piece () in the process along the worm flanks () by way of the pitch of the worm toothing system ().63020122422. The method as claimed in claim 3 , characterized in that the grinding belt () is moved at a lower relative speed than ...

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Номер записи: 46
06-02-2020 дата публикации

PISTON WITH COFUSED ALFIN RING AND PROCESS TO OBTAIN IT

Номер: US20200038948A1
Автор: Anguillesi Dimitri
Принадлежит:

The present invention relates to a process for producing a piston made of hypereutectic Al—Si alloy with a cast iron Alfin ring and a piston obtained through said process. The process according to the invention allows to obtain high adhesion of the Alfin ring to the piston body, making it particularly suitable for use in high performance engines. 1. A process to produce for a piston made of a hypereutectic Al—Si alloy comprising at least one Alfin ring , comprising the steps of:(i) providing at least one cast iron ring;(ii) soaking said at least one cast iron ring in at least one aluminium plating bath comprising an Al—Si alloy comprising 8.0-12.0 wt. % of Si at the temperature of 650°-750° C.;(iii) extracting the cast iron ring from the aluminium plating bath and inserting it in a casting mold;(iv) pouring a hypereutectic Al—Si alloy comprising 16-24 wt. % of Si into the mold, at a casting temperature of 760°-900° C., thereby obtaining a piston comprising at least one Alfin ring;(v) cooling and extracting the piston from the mold.2. The process according to claim 1 , wherein the at least one cast iron ring comprises Ni-resist austenitic cast iron comprising 12.0-22.0 wt. % of Ni claim 1 , the remaining part being iron and optionally further alloying elements selected from C claim 1 , Si claim 1 , Mn claim 1 , Cr claim 1 , Cu claim 1 , unavoidable impurities and mixtures thereof.4. The process according to claim 1 , wherein the aluminium plating bath comprises an Al—Si alloy comprising 10.0-11.5 wt. % of Si.5. The process according to claim 1 ,wherein the aluminium plating bath comprises an Al—Si alloy comprising Fe and Cu as alloying elements in an overall amount 4 wt. %.7. A piston made of a hypereutectic Al—Si alloy comprising at least one Alfin ring obtained from the process according to claim 1 , wherein the hypereutectic Al—Si alloy comprises 16-24 wt. % of Si.8. The piston according to claim 7 , comprising at least one Alfin ring made of “Ni-resist” ...

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Номер записи: 47
19-02-2015 дата публикации

Method and machine tool for machining a rotationally asymmetrical region

Номер: US20150047597A1
Автор: Volker Gniesmer
Принадлежит: KS KOLBENSCHMIDT GMBH

In order to machine at least one workpiece on a lathe, where the workpiece rotates in the lathe and the at least one region to be machined of the workpiece is machined with the aid of at least one tool of the lathe, where the tool is moved at least parallel to the rotation axis of the workpiece, where the tool is moved parallel to the rotation axis of the workpiece such that the machined region of the workpiece is formed in a rotationally asymmetrical manner with respect to the rotation axis of the workpiece after machining. Furthermore, the invention disclosure relates to a cooling duct to a piston wall, and to a combustion-chamber hollow of a piston and also to a lathe.

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Номер записи: 48
18-02-2016 дата публикации

Component with internal and external teeth and method for manufacturing component

Номер: US20160047455A1
Автор: STRAUB Anton, WITTIG Axel
Принадлежит:

Method for producing a compound, rotationally symmetrical component () with internal and external teeth consisting of a blank () and a toothed body (), wherein the two parts () are designed in the form of a pot and in a first method step are inserted coaxially one inside another with interlocking, mutual support and in a second method step are interlocked together with at least one forming tool () applied against the (inner and/or outer) circumference, wherein in the second method step the circumferential surface (′) of said blank () is continuously deformed in a rolling forming process in the axial direction and in the radial direction such that the circumferential surface (′) of the blank () is deformed to interlock into the tooth bases () of the teeth () of the toothed body (). 131515172714141141411065. A method for manufacturing a compound , rotationally symmetrical component () with internal and external teeth consisting of a blank () and a toothed body () , wherein the two parts ( , ) are cup-shaped and nested coaxially in a first method step under form-fitting , mutual support and positively interconnected in a second method step with at least one forming tool ( , ) resting against the (inner or outer) periphery , comprising deforming the circumferential surface ( , ′) of the blank () continuously in the axial direction and in the radial direction with a roll forming process such that the circumferential surface ( , ′) of the blank () is deformed in a form-fitting manner into the tooth grooves () of the toothing () of the toothed body ().2141411551. The method as set forth in claim 1 , wherein the circumferential surface ( claim 1 , ) of the blank () is formed in the impact extrusion process in the circumferential surface () of the toothed body () under formation of toothing ().3419111525. The method as set forth in claim 1 , wherein the impact extrusion method for producing the toothing () of the blank () is embodied as a cold-extrusion method claim 1 , so ...

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Номер записи: 49
03-03-2016 дата публикации

PISTON WITH THERMALLY INSULATED CROWN

Номер: US20160059366A1
Автор: Flowers William
Принадлежит:

Exemplary pistons and methods are disclosed. A piston may include a piston body defining a piston axis, the body including radially inner and outer body mating surfaces, and an annular ring cooperating with the piston body to form a continuous upper combustion bowl surface having a radially inner portion defined by the piston body and a radially outer portion defined by the annular ring. The annular ring includes a radially inner ring mating surface and a radially outer ring mating surface, wherein at least one of the annular ring mating surfaces is joined with the corresponding piston body mating surface. The annular ring and piston body cooperate to define an annular gap therebetween configured to thermally insulate the piston body from the annular ring. 1. A method , comprising:providing a piston body defining a piston axis, the body including radially inner and outer body mating surfaces;assembling an annular ring with the piston body such that the piston body and crown ring cooperate to form a continuous upper combustion bowl surface having a radially inner portion defined by the piston body and a radially outer portion defined by the annular ring, the annular ring including a radially inner ring mating surface and a radially outer ring mating surface;joining the body to the annular ring along at least one of the radially inner and outer mating surfaces of the body and the annular ring;wherein the annular ring and piston body cooperate to define an annular gap therebetween configured to thermally insulate the piston body from the annular ring.2. The method of claim 1 , further comprising establishing the joining of the body to the annular ring along the at least one of the radially inner and outer mating surfaces of the body and the annular ring as including laser welding.3. The method of claim 1 , wherein the piston body includes a skirt configured to interface with an engine bore surface.4. The method of claim 1 , further comprising forming a weld spatter on ...

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Номер записи: 50
02-03-2017 дата публикации

METHOD OF MANUFACTURING MULTI-MATERIAL GEARS

Номер: US20170056961A1
Автор: Balint Daniel, Dean Trevor Anthony, Lin Jianguo, Politis Denis
Принадлежит:

A method of manufacturing a multi-material gear is disclosed. The method comprises the steps of (a) heating a first pre-form element of a first material to a temperature at which the first material can be formed; (b) heating a second pre-form element of a second material to a temperature at which the second material can be formed; and (c) forming the first and second pre-form elements in a die at least towards the shape of the gear, thereby providing bonding between the elements. 112.-. (canceled)13. A method of manufacturing a multi-material gear comprising the steps of:(a) in a first furnace, heating a first pre-form element of a first material to a first temperature at which the first material can be formed;(b) in a second furnace, heating a second pre-form element of a second material to a second temperature at which the second material can be formed; and(c) forming the first and second pre-form elements in a die at least towards the shape of the gear, thereby providing bonding between the elements.14. A method according to claim 13 , wherein the temperature at which the first material can be formed is substantially different from the temperature at which the second material can be formed.15. A method according to and comprising the step of juxtaposing the heated pre-form elements.16. A method according to and comprising applying a force to the elements to deform at least part of each element.17. A method according to claim 16 , wherein the deformation is such as to provide mechanical bonding between the elements; and/or the deformation is such as to provide diffusion bonding between the elements; and/or the deformation is such as to provide adhesion between the elements.18. A method according to claim 17 , wherein the bonding and/or adhesion is to resist relative angular movement of the elements.19. A method according to claim 16 , wherein the force is a substantially axial force to cause substantially radial deformation.20. A method according to claim 13 , ...

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Номер записи: 51
22-05-2014 дата публикации

METHOD FOR THE PRODUCTION OF A PISTON FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20140137405A1
Автор: KEMNITZ Peter, Scharp Rainer, Ullrich Michael
Принадлежит: MAHLE International GmbH

A method for producing piston for an internal combustion engine which has a piston head that has a circumferential cooling channel as well as a combustion bowl having a circumferential bowl wall that makes a transition into a piston crown by way of a bowl edge region. The combustion bowl is formed at least in part by a piston base body and the bowl wall is formed at least in part from an insert. The insert is connected with the piston base body by means of beam welding. A lower weld. seam is configured in the bowl wall, which seam encloses an acute angle with the piston center axis (M) and ends in the lower half of the cooling channel. An upper weld seam runs from the cooling channel ceiling to the piston crown and is disposed centered or radially offset toward the outside, with reference to the clear width of the cooling channel. 1. A method for the production of a piston having a piston head that has a circumferential cooling channel as well as a combustion bowl having a circumferential bowl wall that makes a transition into a piston crown by way of a bowl edge region , wherein the combustion bowl is formed at least in part by a piston base body , and the bowl wall is formed at least in part from an insert , the base body and insert having joining surfaces , comprising the following method steps:(a) pre-working the piston base body and the insert, at least in a region of the joining surfaces;(b) assembling the piston base body and insert;(c) connecting the piston base body and insert along their corresponding joining surfaces, by means of beam welding; and(d) machining the piston to finish the piston.2. The method according to claim 1 , wherein in step a) claim 1 , the joining surfaces of piston base body and insert are cleaned and smoothed.3. The method according to claim 1 , wherein in step b) claim 1 , the piston base body and the insert are assembled by means of a press fit or by tacking.4. The method according to claim 1 , wherein in step c) claim 1 , the ...

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Номер записи: 52
02-03-2017 дата публикации

PISTON WITH LOW OVERALL HEIGHT

Номер: US20170058824A1
Автор: Luz Gerhard, Müller Jochen, Ottliczky Emmerich, Weiss Eberhard
Принадлежит:

A piston for an internal combustion engine having an upper part joined by a positive material connection to a lower part, wherein the lower part includes a skirt and at least one pin bore, wherein the upper part includes a combustion bowl and a piston crown with a crown edge, wherein at least one joining point is located in the area of a ring belt and/or in an outer wall of the combustion bowl. A method for producing a piston for internal combustion engines is disclosed. 1. A piston for an internal combustion engine having an upper part joined through a positive material connection to a lower part , wherein the lower part includes a skirt and at least one piston pin bore , wherein the upper part includes a combustion chamber bowl and a piston crown with a crown edge , characterized in that at least one joining point is located in the area of a ring belt and/or in an outer wall of the combustion bowl.2. The piston from claim 1 , wherein a location of the inner joining point is provided in the outer wall of the combustion bowl above a finish-machined base of the combustion bowl.3. The piston from the claim 1 , wherein the piston has a low compression height claim 1 , wherein the ratio of compression height (h) to piston diameter (d) is between 0.48 and 0.75.4. The piston from claim 1 , wherein at least one recess is provided in the crown of the piston.5. The piston from claim 4 , wherein the at least one recess has a least one opening that at least partially passes through the edge of the piston crown.628. The piston from claim 5 , wherein the at least one opening () is shaped as a segment of a circle.7. The piston from claim 4 , wherein the at least one recess forms at least one valve pocket.8. The piston from claim 7 , wherein a distance xbetween a line claim 7 , the line between pressure side and counter-pressure side claim 7 , and a center point of the first valve pocket is greater than a distance xbetween the line and the center point of the second valve pocket.9 ...

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Номер записи: 53
20-02-2020 дата публикации

RACK BAR AND METHOD FOR MANUFACTURING RACK BAR

Номер: US20200056693A1
Автор: SUNAGA Norimasa, YAMAWAKI Takashi
Принадлежит: NETUREN CO., LTD.

A rack bar includes a shaft member having a toothed section. The toothed section has a plurality of rack teeth, and extends over a portion of an entire length of the shaft member along a longitudinal direction of the shaft member. The shaft member has a grinding-finished outer peripheral surface extending over the entire length of the shaft member including the toothed section. A method for manufacturing the rack bar includes forming the toothed section by plastic working and grinding the outer peripheral surface to improve shape accuracy. 16-. (canceled)7. A method for manufacturing a rack bar , comprising:forming a toothed section having a plurality of rack teeth by a plastic working over a portion of an entire length of the shaft member along a longitudinal direction of the shaft member; andgrinding an outer peripheral surface of the shaft member over the entire length of the shaft member including the toothed section.8. The method according to claim 7 , wherein the plastic working comprises forming the toothed section to have an outer diameter that includes a grinding margin to be ground in the grinding.9. The method according to claim 7 , further comprising joining claim 7 , after the grinding claim 7 , an extension shaft member to one end of the shaft member coaxially with the shaft member.10. The method according to claim 9 , wherein the grinding comprises grinding the outer peripheral surface of the shaft member to have a same outer diameter as the extension shaft member.11. The method according to claim 8 , further comprising joining claim 8 , after the grinding claim 8 , an extension shaft member to one end of the shaft member coaxially with the shaft member. The present invention relates to a rack bar for use in, for example, a rack-and-pinion steering device of a vehicle and to a method for manufacturing the rack bar.Rack bars for use in rack-and-pinion steering devices and the like are manufactured by forming a plurality of rack teeth on a portion of a ...

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Номер записи: 54
28-02-2019 дата публикации

PISTON AND METHOD OF MAKING A PISTON

Номер: US20190061074A1
Автор: Martins Airton, Ribeiro Carmo
Принадлежит:

A one-piece piston including a combustion bowl which is cast to its final form and includes at least one irregularity spaced from a central axis. The piston is initially fabricated of an upper crown member and a lower crown member, which are joined together. The piston is then chucked into a machine tool, such as a CNC lathe, which locates either the piston's top surface or a portion of the combustion bowl and establishes its location as a datum plane. It is this datum plane which serves as a reference location for subsequent machining operations of the piston. 1. A method of making a piston comprising the steps of:preparing a single piece upper crown member of steel having a top surface and a combustion bowl recessed in said top surface, wherein the combustion bowl has a final finish form that is produced by other than machining;preparing a lower crown member as a discrete component separate from the upper crown member;joining the upper and lower crown members together; andmachining at least a portion of said jointed upper and lower crown members other than said combustion bowl.2. The method of claim 1 , wherein the final finish form of the combustion bowl is produced by casting.3. The method of claim 1 , wherein at least a portion of the piston is produced by forging.4. The method of claim 3 , wherein at least portions of the forged piston are in the final finished form.5. The method of claim 1 , wherein the top surface has a final finish form produced by other than casting.6. The method of wherein the upper and lower crown members are joined by friction welding.7. The method of wherein the friction welded upper and lower crown members are formed with an annular oil gallery.8. The method of including forming the final finished form of the combustion bowl to have a complex shape lacking rotational symmetry.9. The method of wherein the complex shape is asymmetric in the circumferential direction of the combustion bowl.10. A method of making a piston comprising the ...

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Номер записи: 55
29-05-2014 дата публикации

METHOD FOR MANUFACTURING MULTI-STAGE GEAR, AND MULTI-STAGE GEAR

Номер: US20140144269A1
Автор: AOYAMA Hironori, INOSHITA Hirofumi, Masui Toshiaki, Shimoda Koji, SUKEDA Takuya, TOMIOKA Akinori
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

In a method for manufacturing a multi-stage gear in which no gap is formed between a small-diameter gear and a large-diameter gear, there are included a first step of forming the small-diameter gear on an outer peripheral surface of a workpiece, a second step of forming a large-diameter gear part by plastically deforming an end portion of the workpiece to increase the diameter thereof, and a third step of forming the large-diameter gear by cutting the large-diameter gear part. 1. A method for manufacturing a multi-stage gear formed with gears having different diameters on an outer peripheral surface of a hollow cylindrical workpiece , the method including:a first step of forming a small-diameter gear on the outer peripheral surface;a second step of forming a large-diameter gear part by plastically deforming an end portion of the workpiece to increase a diameter thereof; anda third step of forming a large-diameter gear by cutting the large-diameter gear part.2. The method for manufacturing a multi-stage gear according to claim 1 , wherein the plastic deformation in the second step includes widening the diameter of the end portion in a radial direction and bending the diameter-widened end portion toward the small-diameter gear.3. The method for manufacturing a multi-stage gear according to claim 2 , wherein the second step uses a flanged roller for the plastic deformation.4. The method for manufacturing a multi-stage gear according to claim 2 , wherein the second step includes hammering for the plastic deformation claim 2 , and the hammering uses a hammer having a contact area smaller than a cross sectional area of the small-diameter gear.5. The method for manufacturing a multi-stage gear according to claim 1 , wherein the second step includes heating the end portion of the workpiece by high-frequency heating.6. A multi-stage gear manufactured by the method for manufacturing a multi-stage gear according to claim 1 , wherein an end portion of the small-diameter gear ...

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Номер записи: 56
08-03-2018 дата публикации

ONE-PIECE PISTON FEATURING ADDITIVE MACHINING PRODUCED COMBUSTION BOWL RIM AND COOLING GALLERY

Номер: US20180066603A1
Автор: CROMME WOLFRAM, EVERS ROSS, KENNINGLEY SCOTT
Принадлежит:

A piston capable of withstanding high temperatures and extreme conditions of a combustion chamber of an internal combustion engine and manufactured with reduced costs is provided. The method of manufacturing the piston includes casting or forging the bulk of the piston as a single-piece with an open cooling gallery from an economical first material, such as steel, cast iron, or aluminum. The method further includes forming a portion of a combustion bowl surface, which is a small area of the piston directly exposed to the combustion chamber, from a second material by additive machining. The second material has a higher thermal conductivity and higher resistance to oxidation, erosion, and oil coking, compared to the first material. The additive machining process is efficient and creates little waste, which further reduces production costs. 1. A piston for an internal combustion engine , comprising:a crown portion and a skirt portion formed from a first material;a combustion surface disposed along the crown portion, wherein at least a portion of the combustion surface is formed from a second material by an additive machining process; anda heat affected zone defined by a first edge along the first material and a second edge along the second material, wherein the first edge has a shape following the shape of the second edge.2. The piston of claim 1 , wherein a single piece of the first material forms the crown portion and the skirt portion; and the second material has at least one of a higher thermal conductivity claim 1 , higher erosion resistance claim 1 , higher resistance to coking adhesion claim 1 , and a higher oxidation resistance than the first material.3. The piston of claim 1 , wherein an underside of the combustion surface includes surface irregularities immediately following the additive machining process and prior to any subsequent machining; and the second material of the combustion surface includes martensite and tempered martensite in a crystalline ...

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Номер записи: 57
19-03-2015 дата публикации

METHOD FOR MANUFACTURING MACHINED PART, AND MACHINED PART

Номер: US20150075003A1
Автор: Inagaki Koji, Kanazawa Takaaki, Mitsubayashi Masahiko, TAWA Hiroyoshi
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

[Task] To provide a method that makes it possible to easily, inexpensively and accurately manufacture a machined part with a simple configuration and an excellent strength. 1. A method for manufacturing a machined part by cutting and removing a predetermined region of a raw material through machining , comprising:introducing a dislocation only into the region to be cut and removed after the raw material, before carrying out the machining,depositing graphite only in the region through heating, andcutting and removing the region where the graphite is deposited.2. The method for manufacturing the machined part according to claim 1 , further comprising:pre-molding the region before introducing the dislocation.3. The method for manufacturing the machined part according to claim 1 , further comprising:carrying out quenching after cutting and removing.4. The method for manufacturing the machined part according to claim 1 , whereinintroduction of the dislocation is carried out through shot peening.5. The method for manufacturing the machined part according to claim 4 , whereina depth to which the dislocation is introduced into a surface layer of the region is controlled by changing a particle diameter of a projection material for shot peening, in introduction of the dislocation.6. The method for manufacturing the machined part according to claim 1 , further comprising:forming a geared tooth in the region through machining.7. The method for manufacturing the machined part according to claim 6 , further comprising:pre-molding a cylindrical raw material through hot forging, whereinthe region into which the dislocation is introduced is a surface layer,the region where graphite is deposited through heating is the surface layer, andthe region where the geared tooth is formed through machining is the surface layer.8. The method for manufacturing the machined part according to claim 6 , further comprising:pre-molding a cylindrical raw material into a shape of a gear through hot ...

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Номер записи: 58
19-03-2015 дата публикации

PISTON PUSH ROD ASSEMBLY, MASTER CYLINDER, AND MANUFACTURING METHOD FOR PISTON PUSH ROD ASSEMBLY

Номер: US20150075370A1
Автор: Murayama Kazuaki, NAKAMURA Motoyasu, Ohnishi Takaaki, Suzuki Jiro, Tagata Kazuhiro, TAKAMATSU Yoshiyuki
Принадлежит:

Provided is a piston push rod assembly which can prevent discomfort from being imparted during the operation of a brake pedal by a driver. A piston push rod assembly, wherein: a second piston is provided with a piston slide section which is housed in a cylinder and which slides relative to the cylinder, and a connection tube section which is connected to a push rod; the piston slide section is covered by metal plating; the connection tube section has a non-plated section; and the second piston and the push rod are connected by the caulking of the connection tube section when the push rod has been inserted inside the connection tube section. 1. A piston push-rod assembly in which a piston for a master cylinder is connected to a push rod; a piston sliding portion which is contained in a cylinder and slides relative to the cylinder, and', 'a tubular connection portion which is connected to the push rod; and, 'the piston including,'}the piston sliding portion being coated with plating, and the tubular connection portion including an unplated portion.2. The piston push-rod assembly according to claim 1 , wherein the unplated portion is arranged on an inner circumferential surface and an outer circumferential surface of the tubular connection portion.3. The piston push-rod assembly according to claim 1 , wherein the tubular connection portion has a diameter smaller than the piston sliding portion claim 1 , and the plating is arranged on an area extending from an outer circumferential surface of the piston sliding portion to a connection surface connecting the outer circumferential surface of the piston sliding portion and an outer circumferential surface of the tubular connection portion.4. The piston push-rod assembly according to claim 1 , further comprising a cover member which covers the tubular connection portion claim 1 , wherein the tubular connection portion has a diameter smaller than the piston sliding portion claim 1 , the cover member has a cylindrical shape ...

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Номер записи: 59
16-03-2017 дата публикации

PISTON AND METHOD OF MAKING A PISTON

Номер: US20170072518A1
Автор: Martins Airton, Ribeiro Carmo
Принадлежит:

A one-piece piston including a combustion bowl which is cast to its final form and includes at least one irregularity spaced from a central axis. The piston is initially fabricated of an upper crown member and a lower crown member, which are joined together. The piston is then chucked into a machine tool, such as a CNC lathe, which locates either the piston's top surface or a portion of the combustion bowl and establishes its location as a datum plane. It is this datum plane which serves as a reference location for subsequent machining operations of the piston. 1. A method of making a piston comprising the steps of:preparing a single piece upper crown member of steel having a top surface and a combustion bowl recessed in said top surface, wherein the combustion bowl has a final finish form that is produced by other than machining;preparing a lower crown member as a discrete component separate from the upper crown member;joining the upper and lower crown members together; andmachining at least a portion of said jointed upper and lower crown members other than said combustion bowl.2. The method of claim wherein the final finish form of the combustion bowl is produced by casting.3. The method of claim 1 , wherein at least a portion of the piston is produced by forging.4. The method of claim 3 , wherein at least portions of the forged piston are in the final finished form.5. The method of claim 1 , wherein the top surface has a final finish form produced by other than casting.6. The method of wherein the upper and lower crown members are joined by friction welding.7. The method of wherein the friction welded upper and lower crown members are formed with an annular oil gallery.8. The method of including forming the final finished form of the combustion bowl to have a complex shape lacking rotational symmetry.9. The method of wherein the complex shape is asymmetric in the circumferential direction of the combustion bowl. This Divisional Application claims the benefit of U ...

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Номер записи: 60
05-03-2020 дата публикации

METHOD FOR PRODUCING A PISTON

Номер: US20200070289A1
Автор: Hrdina Daniel
Принадлежит:

A method for producing a piston may include providing a blank of a piston base member with an outer peripheral joining face, an inner peripheral joining face which may be expanded in a direction of a base region of a combustion bowl, and a lower cooling channel portion which may extend between the outer and inner peripheral joining faces, wherein at least one of (i) at least one of the outer and inner peripheral joining faces and (ii) the lower cooling channel portion may be not subsequently processed. The method may then include providing a blank of a piston ring element with an outer annular joining face, an inner annular joining face, and an upper cooling channel portion which may extend between the outer and inner annular joining faces, wherein at least one of (i) at least one of the outer and inner annular joining faces and (ii) the upper cooling channel portion may be not subsequently processed. The method may then include joining the blanks via the outer and inner peripheral joining faces and the outer and inner annular joining faces to form a piston blank in such a manner that, at least in the base region of the combustion bowl, a part-region of the expanded inner peripheral joining face of the blank of the piston base member may remain free. The method may further include subsequently at least partially processing the piston blank to form the piston with the part-region of the expanded inner peripheral joining face being removed. 1. A method for producing a piston for an internal combustion engine having a piston base member and a piston ring element , wherein the piston base member has at least one piston shaft and at least one base region of a combustion bowl , wherein the piston ring element has a piston base , at least one wall region of the combustion bowl , a peripheral top land and at least one portion of a peripheral ring portion which is provided with annular grooves , and wherein the piston base member and the piston ring element form a peripheral ...

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Номер записи: 61
16-03-2017 дата публикации

METHOD FOR FORMING POWER TRANSMISSION COMPONENTS USING HEAT-ASSISTED CALIBRATION PROCESS AND POWER TRANSMISSION COMPONENTS MADE USING METHOD

Номер: US20170073790A1
Автор: SABO John R., Sulaj Sokol
Принадлежит:

A method for forming a component utilizing ultra-high strength steel and components formed by the method. The method includes the step of providing a flat blank of ultra-high strength 22MnB5 steel. The next step of the method is, cold forming the flat blank into an unfinished shape of a component while the blank is in an unhardened state. The method continues by providing an inert atmosphere. Then, heating the unfinished shape of the component in the inert atmosphere. The method proceeds by forming a finished shape of the component using a quenching die resulting in a fine-grained martensitic component material structure and enabling net shape processing to establish fmal geometric dimensions of the components. 1. A method for forming a component utilizing ultra-high strength steel including the steps of:providing a flat blank of ultra-high strength steel;forming the flat blank into an unfinished shape of a component;providing an inert atmosphere;heating the unfinished shape of the component in the inert atmosphere; andforming a finished shape of the component using a quenching die.2. The method as set forth in wherein the step of heating the unfinished shape of the component in the inert atmosphere is further defined as heating the unfinished shape of the component in the inert atmosphere at a temperature between 850 degrees Celsius and 950 degrees Celsius.3. The method as set forth in wherein the step of forming a finished shape of the component using a quenching die is further defined as forming a finished shape of the component using a quenching die while cooling the component to a temperature between 150 degrees Celsius and 250 degrees Celsius.4. The method as set forth in wherein the step of forming the flat blank into an unfinished shape of a component further includes the step of forming a plurality of spline teeth in the unfinished shape.5. The method as set forth in wherein the step of forming a finished shape of the component using a quenching die is ...

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Номер записи: 62
05-06-2014 дата публикации

High Torque Capacity Reverse Clutch

Номер: US20140155217A1
Автор: Nader Gregg, Rowell Brian
Принадлежит:

A reverse clutch and planetary gear set are provided that can be installed in an automotive transmission. In some embodiments, the reverse clutch and planetary gear set are configured and dimensioned to be installed in a Powerglide transmission case. In other embodiments, the reverse clutch can have an increased mean diameter. In some embodiments, the reverse clutch can have an increased static holding capacity. In another embodiment, the planetary gear set can have a reduced numerical first gear ratio. In other embodiments, the planetary gear set can have components with increased strength. Methods for modifying a transmission to install a reverse clutch and planetary gear set are also provided. 1. A two forward speed , one reverse speed automatic transmission , comprising:an OE Powerglide transmission case; anda compound planetary gear set disposed within said OE Powerglide transmission case and cooperating between an input shaft and an output shaft to provide a first forward gear and a second forward gear;wherein the first gear has a numerical ratio less than approximately 1.64:1.2. The transmission of claim 1 , wherein the planetary gear set comprises an input sun gear claim 1 , a long pinion claim 1 , and a reaction sun gear claim 1 , wherein the input sun gear is moveably coupled to the long pinion claim 1 , and the long pinion is moveably coupled to the input sun gear and the reaction sun gear claim 1 , such that a rotational force can be transmitted from the input sun gear claim 1 , through the long pinion claim 1 , to the reaction sun gear.3. The transmission of claim 2 , wherein the long pinion comprises an elongate member having a proximal end and a distal end and an outer surface extending therebetween claim 2 , the outer surface having a plurality of teeth claim 2 , wherein the number of teeth at the proximal end is the same as the number of teeth at the distal end.4. The transmission of claim 3 , wherein the long pinion has a substantially constant ...

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Номер записи: 63
05-03-2020 дата публикации

Piston With A Structured Design

Номер: US20200072158A1
Автор: Berninger Andreas, Fahr Matthias, Luz Gerhard, Müller Gregor, Ottliczky Emmerich
Принадлежит:

Piston () of an internal combustion engine, which piston is designed in structured construction, comprising two oppositely arranged load-bearing skirt wall portions (), wherein a connecting wall () respectively extends, starting from a pin boss (), in the direction of the side edge of the load-bearing skirt wall portions (), characterized in that in an interior of the piston () is (are) disposed at least one rib (), preferably three ribs (), and the material of the regions around the at least one rib () is reduced. 1123421567. A piston () of an internal combustion engine , which piston is designed in structured construction , comprising two oppositely arranged load-bearing skirt wall portions () , wherein a connecting wall () respectively extends , starting from a respective one of two pin bosses () , in the direction of a side edge of the load-bearing skirt wall portions () , characterized in that in an interior of the piston () is disposed at least one of a first rib () , a second rib () , or a third rib () and wherein a material thickness of a region around the at least one of the first , the second or the third rib is reduced.2152. The piston () of claim 1 , wherein the at least one rib comprises the first rib () claim 1 , disposed on an inner side of the respective load-bearing skirt wall portion ().3164. The piston () of claim 1 , wherein the at least one rib comprises the second rib () which connects the two pin bosses () to one another.417. The piston () of claim 1 , wherein the at least one rib comprises a third rib () oriented transversely to a pin bore axis.5148. The piston () of claim 1 , wherein an inward facing side of each of the two pin bosses () defines a recess () positioned around one of an upper or lower apex thereof.6152. The piston () of claim 5 , characterized in that claim 5 , around the first rib () claim 5 , the load-bearing skirt wall portion () has a reduced wall thickness (RW).714108. The piston () of claim 5 , wherein each of the two ...

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Номер записи: 64
26-03-2015 дата публикации

METHOD FOR PRODUCING AN ALUMINUM PISTON

Номер: US20150082632A1
Автор: Bing Karlheinz, Hackh Thomas, Schnaiter Frank
Принадлежит:

A method for producing an aluminum piston for an internal combustion engine may including providing a piston bowl having a bowl edge and a bowl base; subjecting an area of at least one of the bowl edge and the bowl base to a welding treatment to introduce at least one additional element into a base material of the piston bowl and to produce intermetallic phases in the base material; the welding treatment may introduce at least one of the following additional elements at the specified concentrations, 1-7 wt. percentage of Ni, 1-15 wt. percentage of Cu and 1-5 wt. percentage of Fe. 1. A method for producing an aluminium piston for an internal combustion engine , comprising: providing a piston bowl having a bowl edge and a bowl base , subjecting an area of at least one of the bowl edge and the bowl base to a welding treatment to introduce at least one additional element into a base material of the piston bowl and to produce intermetallic phases in the base material , wherein the welding treatment introduces at least one of the following additional elements at the specified concentration , 1-7 wt. percentage of Ni , 1-15 wt. percentage of Cu and 1-5 wt. percentage of Fe.2. The method according to claim 1 , wherein subjecting the area of at least one of the bowl edge and the bowl base to the welding treatment introduces at least one of the following additional elements at the specified concentration claim 1 , 1-7 wt. percentage of Ni claim 1 , 1-15 wt. percentage of Cu and 0.5-5 wt. percentage of Fe.3. The method according to claim 1 , wherein the welding treatment includes at least one of the following with the specified ratio of arc energy input per unit length/weld penetration area E/A (J/mm): (i) arc welding claim 1 , via tungsten inert gas welding with E/A=7-17 J/mm claim 1 , (ii) arc welding via plasma welding with E/A=6-16 J/mm claim 1 , (iii) laser beam welding with E/A=80-90 J/mm claim 1 , and (iv) electron beam welding with E/A=5-15 J/mm.4. The method according ...

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Номер записи: 65
23-03-2017 дата публикации

STRAIN WAVE GEARING AND METHOD FOR MANUFACTURING MULTI-LAYER HOLLOW BODY

Номер: US20170082187A1
Автор: Kiyosawa Yoshihide, KOBAYASHI Masaru
Принадлежит: Harmonic Drive Systems Inc.

A wave plug of a wave generator of a wave gear device includes: a metallic outer hollow body with an elliptical wave plug outer circumferential surface formed thereon; a metallic inner hollow body with a wave plug inner circumferential surface formed thereon; and an intermediate hollow body sandwiched between the outer hollow body and the inner hollow body. The intermediate hollow body includes CFRP layers. It is possible to implement a light wave plug in which a big hollow portion can be formed while assuring a required rigidity. Using the wave plug makes it possible to implement a light wave gear device which allows jumping to occur at a high load torque and which includes a big hollow portion. 1. A strain wave gearing Comprising:a rigid internally toothed gear;a flexible externally toothed gear; anda wave generator for causing the flexible externally toothed gear to flex into a non-circular shape and partially mesh with the rigid internally toothed gear, and causing meshing positions between the two gears to move in a circumferential direction, whereinthe wave generator has a hollow wave plug formed with a plug outer-circumferential surface in a non-circular shape, and a wave bearing mounted on the plug outer-circumferential surface;at least one of the rigid internally toothed gear and the wave plug is formed from a multi-layer hollow body;the multi-layer hollow body has an outer hollow body made of metal, an inner hollow body made of metal, and an intermediate hollow body sandwiched between the outer hollow body and the inner hollow body; andthe intermediate hollow body has:a first hollow body made of metal;a first carbon-fiber-reinforced plastic layer sandwiched between an outer-circumferential surface of the first hollow body and an inner-circumferential surface of the outer hollow body; anda second carbon-fiber-reinforced plastic layer sandwiched between an inner-circumferential surface of the first hollow body and an outer-circumferential surface of the ...

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Номер записи: 66
12-03-2020 дата публикации

FRICTION RING FOR A BRAKE DISK AND RELATED METHODS

Номер: US20200080607A1
Автор: Boden Sven, Jungbecker Johann, Linhoff Paul
Принадлежит: Continental Teves AG & Co. oHG

A brake disk with a friction ring or to a friction ring, which comprises a PMMC (particle metal matrix composite), at least in the region of its friction surface. The friction surface of the friction ring is provided with mechanically applied microgrooves, which extend in a radial direction with respect to a circumferential direction of rotation of the friction ring, non-tangentially angled thereto. 1. A friction ring for a brake disk comprising:at least one friction surface configured for interacting with a brake lining, wherein the friction ring comprises a PMMC material (particle metal matrix composite) in the region of the friction surface; andthe at least one friction surface has at least one microgroove which extends in a radially directed manner with respect to a circumferential direction of rotation of the friction ring, non-tangentially angled to the circumferential direction of rotation at least with one component.2. The friction ring as claimed in claim 1 , wherein the friction ring comprises an Al-MMC material.3. The friction ring as claimed in claim 1 , wherein the microgrooves are arranged orthogonally to the circumferential direction of rotation.4. The friction ring as claimed in claim 1 , wherein the microgrooves are introduced into the friction surface by a mechanical removing or forming method.5. The friction ring as claimed in claim 1 , wherein the microgrooves are arranged close to one another in the circumferential direction in such a way that in cross section a sawtooth-like profile with directly adjacent roughness peaks and roughness values is formed.6. A method for machining the friction surface of a friction ring claim 1 , the friction ring having at least one friction surface configured for interacting with a brake lining claim 1 , wherein the friction ring comprises a PMMC material (particle metal matrix composite) in the region of the friction surface claim 1 , the at least one friction surface has at least one microgroove which extends ...

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Номер записи: 67
19-06-2014 дата публикации

Fan Drive Gear System Assembly Guide

Номер: US20140165762A1
Автор: Coffin James B.
Принадлежит: UNITED TECHNOLOGIES CORPORATION

A gas turbine engine has a fan and a turbine section including a turbine rotor to drive the fan through a gear reduction module. An input shaft downstream of the turbine rotor includes a flexible mount driving the gear reduction. The input shaft is mounted within a bearing module. The gear reduction module has static structure mounted to an engine housing through a flexible mount. Oil is supplied into the gear reduction. An oil tube supplies oil from the gear reduction to the bearing module, and is received within openings in the static structure, and a housing for the bearing module. The oil tube extends through an assembly guide having a guide opening spaced away from an outer periphery of the oil tube. The guide opening is intermediate the openings. A method is also disclosed. 1. A gas turbine engine comprising:a fan, a turbine section including a turbine rotor to drive said fan through a gear reduction;an input shaft downstream of said turbine rotor including a flexible mount driving said gear reduction, and said input shaft being mounted within a bearing module, and said gear reduction module having static structure mounted to an engine housing through a flexible mount; andan oil supply system to supply oil into said gear reduction module, and an oil tube to supply oil from said gear reduction module to said bearing module, said oil tube being received within an opening in said static structure, and in an opening in a housing for said bearing module, and said oil tube extending through an assembly guide having a guide opening which is spaced away from an outer periphery of said oil tube, and said guide opening is intermediate said opening in said static structure, and said opening in said bearing housing.2. The gas turbine engine as set forth in claim 1 , wherein said assembly guide is mounted to said gear reduction module.3. The gas turbine engine as set forth in claim 1 , wherein said opening in said static structure claim 1 , and said opening in said bearing ...

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Номер записи: 68
31-03-2016 дата публикации

MONOLITHIC, GALLERYLESS PISTON AND METHOD OF CONSTRUCTION THEREOF

Номер: US20160090939A1
Автор: Riffe Jeff, Weinenger Michael
Принадлежит:

A galleryless piston for an internal combustion engine is provided. The piston has a monolithic piston body including an upper wall forming an upper combustion surface with first and second portions. The first portion extends annularly along an outer periphery of the upper wall and the second portion includes a combustion bowl. The first portion can also include valve pockets formed therein to reduce weight. The upper wall has an undercrown surface directly opposite the second portion of the upper combustion surface. To enhance cooling, a center portion of the undercrown surface is concave, such that oil is channeled during reciprocation of the piston from one side to the opposite side of the piston. 1. A piston for an internal combustion engine , comprising:a monolithic piston body extending along a central longitudinal axis;said piston body having an upper wall forming an upper combustion surface with an annular ring belt region depending from said upper combustion surface;said upper combustion surface having first and second portions, said first portion extending annularly along an outer periphery of said upper wall and said second portion forming a combustion bowl depending radially inwardly from said first portion;said upper wall having an undercrown surface formed on an underside thereof, said undercrown surface being located directly opposite said second portion of said upper combustion surface;said piston body including a pair of skirt portions depending from said ring belt region;said piston body including a pair of pin bosses spaced from one another by said skirt portions and providing a pair of laterally spaced pin bores;said piston body being free of a cooling gallery along said undercrown surface between said skirt portions and pin bosses; andsaid undercrown surface including a concave center portion located along said central longitudinal axis.2. The piston of claim 1 , wherein said concave center portion has a length extending longitudinally between ...

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Номер записи: 69
19-03-2020 дата публикации

MAKING NOZZLE STRUCTURES ON A STRUCTURED SURFACE

Номер: US20200086434A1
Автор: Bartow Jeffrey N., Carpenter Barry S., Huffman Alexander J., Nelson Brian K., Schnobrich Scott M.
Принадлежит:

Methods of manufacturing fuel injector nozzle structures such as, e.g., nozzle plates, valve guides, combinations of nozzle plates and valve guides, etc., as well as other articles incorporating microstructured features. The methods may employ multiphoton processes to form microstructured patterns on a three-dimensional structured surface to provide nozzle structures and other articles that include finished microstructured features such as, e.g., through-holes extending from one or more cavities, where at least a portion of the three-dimensional structured surface is used to form the cavities. Forming a microstructured pattern on a three-dimensional structured surface can reduce the time needed to form nozzle structures that include microstructured features and other nozzle structure features (e.g., cavities) by avoiding the need to form the other nozzle structure features using the multiphoton processes. 1. A method of fabricating a nozzle structure , the method comprising:forming a microstructured pattern on at least a portion of a three-dimensional structured surface by multi-photon processing a first material;replicating a negative of the microstructured pattern and at least a portion of the three dimensional structured surface using a second material, different than the first material, to form a replicated structure having a negative pattern of the microstructured pattern and a negative surface of at least a portion of the three dimensional structured surface, wherein the negative of the portion of the three-dimensional structured surface replicated in the second material forms at least part of a cavity of the nozzle structure;separating the replicated structure from the microstructured pattern and three-dimensional structured surface.2. The method of claim 1 , wherein the method further comprises removing second material from the replicated structure claim 1 , after said replicating and either before or after said separating.3. The method of claim 2 , wherein ...

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Номер записи: 70
28-03-2019 дата публикации

HOT FORMING OF COOLING GALLERIES IN STEEL PISTONS

Номер: US20190091757A1
Автор: Shivpuri Rajiv
Принадлежит:

A piston, particularly a piston for use in a diesel engine, particularly a heavy duty diesel engine, is formed from a billet of metal, such that the finished piston has a mass that is at least 50%, and, more preferably, up to about 62%, of the mass of the billet. Other than finishing steps, the piston is formed with a closed gallery, without loss of mass through machining processes. 1. A method for forming a piston having a closed gallery , comprising the steps of:providing a billet of metal;hot forging the billet, producing a first piston preform having a skirt, a piston pin boss and a crown;hot forming the first piston preform to generate a second piston preform having a flange and an undercut, separated axially by a gallery that is open in the radial direction, the gallery being opened up on the second piston preform without any loss of material;hot bending the flange over the open gallery, generating a third piston preform having a closed gallery; andmachining the third piston preform having a closed gallery, generating a finished piston.2. The method of claim 1 , wherein:in the hot forming step, the crown is selectively heated and spin-formed to generate the flange and the undercut that are separated axially by the radially-open gallery.3. The method of claim 1 , wherein:in the machining step, at least a ring belt is formed by machining the piston preform.4. The method of claim 1 , wherein:the finished piston produced has a weight that is at least 50% of the weight of the billet provided.5. The method of claim 1 , wherein:the billet provided is cylindrical.6. The method of claim 5 , wherein:the finished piston produced has a weight that is up to about 62% of the weight of the cylindrical billet provided.7. The method of claim 1 , wherein:substantially all of the difference in weight between the cylindrical billet provided and the finished piston occurs during the step of machining to obtain the finished piston.8. The method of claim 1 , wherein:the billet ...

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Номер записи: 71
16-04-2015 дата публикации

METHOD FOR THE PRODUCTION OF A PISTON FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20150101191A1
Автор: Berr Gerhard, Boczek Sascha-Oliver, Mueller Reiner, Scharp Rainer
Принадлежит: MAHLE International GmbH

A method for the production of a piston made of steel, for an internal combustion engine, in which the upper piston part is produced using the forging method, and the lower piston part is produced using the forging or casting method, and they are subsequently welded to one another. To simplify the production method and make it cheaper, the upper piston part is forged using the method of hot forming and of cold calibration, to finish it to such an extent that further processing of the combustion bowl and of the upper cooling channel regions can be eliminated. 1. A method for the production of a piston for an internal combustion engine , comprising the following steps:producing an upper piston part made of steel by forging, said upper piston part having a piston crown having a combustion bowl, a ring wall formed onto the piston crown radially on the outside, directed downward, and a ring-shaped support disposed radially within the ring wall formed onto an underside of the piston crown, wherein an upper part of a cooling channel is formed between the ring wall and the support,producing a lower piston part made of steel by forging or casting, said lower piston part having two skirt elements that lie opposite one another, which are connected with one another by way of two pin bosses that lie opposite one another, a ring-shaped contact part disposed on a top of the lower piston part and connected with the pin boss, and a circumferential ring rib disposed radially outside of the contact part and connected with the skirt elements, wherein a lower part of the cooling channel is formed between the contact part and the ring rib,welding the upper piston part to the lower piston part by way of contact surfaces of the ring wall and the ring rib, and of the support and the contact part, respectively, wherein the cooling channel formed by the upper piston part and by the lower piston part is closed, andfinishing the piston using a chip-cutting production method,wherein during the ...

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Номер записи: 72
14-04-2016 дата публикации

AIR SPRING PISTON WITH INTEGRATED SEALING

Номер: US20160102727A1
Автор: Makkar Sunny, Pielock Ralf, Pniewski Garrett Mark, Schallmeier Christian
Принадлежит:

An air spring for air suspension system comprises a piston assembly and a damper assembly where the piston assembly is spaced apart from the damper assembly to at least partially define an air chamber. A seal is molded with piston walls to form an integrated piston assembly. The seal includes at least one sealing lip extending radially inward from the piston assembly at an angle that is non-perpendicular to an axis of the damper and the at least one sealing lip contacts the damper assembly when the piston assembly and the damper assembly are assembled together to seal the air chamber. 1. An air spring for air suspension system comprising:a piston assembly and a damper assembly wherein the piston assembly is spaced apart from the damper assembly to at least partially define an air chamber;a seal molded with piston walls to form an integrated piston assembly, wherein the seal includes at least one sealing lip extending radially inward from the piston assembly at an angle that is non-perpendicular to an axis of the damper; andwherein the at least one sealing lip contacts the damper assembly when the piston assembly and the damper assembly are assembled together to seal the air chamber.2. The air spring of claim 1 , wherein the air within the air chamber forces the sealing lip further against the damper assembly.3. The air spring of claim 1 , wherein the seal and the piston walls are injection molded in a two-step process to form the integrated piston assembly.4. The air spring of claim 1 , wherein the piston walls are injection molded around the seal to form the integrated piston assembly.5. A method of manufacturing a piston assembly claim 1 , comprising:forming a seal using an injection mold form;forming piston walls at least partially surrounding the seal with the injection molding form to create an integrated piston assembly;assembling the piston around a damper assembly, such that an air chamber is at least partially defined by the piston assembly and the damper ...

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Номер записи: 73
23-04-2015 дата публикации

METHOD FOR PRODUCING A PISTON WITH A COOLING DUCT

Номер: US20150107106A1
Автор: Buschbeck Ralf, Ottliczky Emmerich
Принадлежит: KS KOLBENSCHMIDT GMBH

A method for producing a piston with a cooling duct for an internal combustion engine, wherein a piston blank is provided with a collar protruding beyond the outer diameter of the later formed piston, and is formed on the piston blank by forging, spin-bending or the like. To form the cooling duct, a radially peripheral recess is introduced into the piston blank by forging, spin-bending or the like. In a further method step, a forming operation is performed on the collar, which together with the peripheral recess forms the cooling duct. 1. A method for producing a piston with cooling duct for an internal combustion engine , having a cooling duct in a crown , wherein a piston blank is provided and a collar projecting beyond an outer diameter of a later formed piston is formed on the piston blank by one of forging , spin-bending or the like , and to create the cooling duct radially peripheral recess is introduced into the piston blank characterized in that the radially peripheral recess is introduced by one of forging , spin-bending or the like into the piston blank and the cooling duct is formed by forming the collar in conjunction with the radially peripheral recess.2. The method from claim 1 , wherein the method for introducing the recess is performed in such manner that the collar is formed as a radially peripheral collar projecting beyond the outer diameter of the piston blank.3. The method from claim 1 , wherein the forming of the collar is carried out by one of forging claim 1 , spin-bending claim 1 , calibration or the like.4. The method from wherein the collar to form the cooling duct positioned against a contact area.5. The method from claim 1 , wherein the collar to form the cooling duct is positioned against an at least partially peripheral flange to determine the position of the collar after forming.6. The method from claim 5 , wherein the collar is permanently attached at the peripheral flange after being formed.7. The method from claim 1 , wherein the ...

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Номер записи: 74
23-04-2015 дата публикации

STEEL PISTON FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR ITS PRODUCTION

Номер: US20150107544A1
Автор: Lehnert Monika, Ramm Juergen, Rose Reinhard, Widrig Beno
Принадлежит:

A steel piston for an internal combustion engine may include a piston crown and a protective layer disposed on the piston crown. The protective layer may include an adhesion layer of Cr or CrN, which is present on a surface of the piston crown. The protective layer may include a functional layer, which is present on the adhesion layer. The functional layer may have at least one of (i) at least one layer (A) of CrN and (ii) at least one layer (B) of CrOn in the form of [(A)/(B)], and a may represent 1 to 100. 1. A steel piston for an internal combustion engine , comprising: a piston crown and a protective layer disposed on the piston crown , wherein the protective layer includes:a) an adhesion layer of Cr or CrN, which is present on a surface of the piston crown, and{'sub': 'a', 'b) a functional layer, which is present on the adhesion layer, wherein the functional layer has at least one of (i) one layer (A) of CrN and (ii) one layer (B) of CrON in the form of [(A)/(B)], wherein a=1 to 100.'}2. The steel piston according to claim 1 , in which wherein a=1.3. The steel piston according to claim 2 , wherein the layer of (A) is not present.4. The steel piston according to claim 2 , wherein the layer of (B) is present as a gradient layer with increasing oxygen content in a direction of the surface which faces away from the layer (A).5. A steel piston for an internal combustion engine claim 2 , comprising: a piston crown and a protective layer disposed on the piston crown claim 2 , wherein the protective layer includes:a) an adhesion layer of Cr or CrN, which is present on a surface of the piston crown, and{'sub': 'a', 'b) a functional layer, which is present on the adhesion layer, wherein the functional layer has at least one of (i) one layer (C) of AlCrO and (ii) one layer (C′) of AlCrO′, wherein the layer (C′) of AlCrO′ is different from the layer (C) of AlCrO, in the form of [(C)/(C′)], wherein a=1 to 100.'}6. The steel piston according to claim 5 , in which wherein a=1 ...

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Номер записи: 75
21-04-2016 дата публикации

DRIVELINE COMPONENT HAVING RING GEAR INTEGRALLY FORMED WITH TUBULAR DRIVE MEMBER

Номер: US20160109013A1
Автор: LI Yongwei
Принадлежит:

The present teachings provide for a power transfer device and method of forming a power transfer device that includes a unitarily formed transfer member and a support member. The transfer member can be supported within a housing for rotation about an input member and can be coupled to the input member to receive rotational power therefrom. A ring gear defined by the transfer member can meshingly engage with a pinion gear. The support member can be disposed concentrically about the input member and be rotatable about a first axis relative to the housing. The support member can have a first end and a second end. The first end of the support member can be supported for rotation relative to the housing by a support bearing. The second end of the support member can be received within a bore defined by the transfer member and fixedly coupled thereto for common rotation. 1. A power transfer device comprising:a housing;an input member disposed within the housing and supported for rotation about a first axis;a pinion disposed within the housing and supported for rotation about a second axis that is transverse to the first axis;a unitarily formed transfer member supported within the housing for rotation about the input member and coupled to the input member to receive rotational power therefrom, the transfer member defining a bore and a ring gear, the ring gear being meshingly engaged with the pinion gear;a support bearing; anda support member that is disposed concentrically about the input member and rotatable about the first axis relative to the housing, the support member having a first end and a second end, wherein the first end of the support member is supported for rotation relative to the housing by the support bearing, and the second end of the support member is received within the bore and fixedly coupled to the transfer member for common rotation.2. The power transfer device of claim 1 , wherein the second end of the support member and the bore of the transfer ...

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Номер записи: 76
19-04-2018 дата публикации

APPARATUS AND METHOD FOR BEVEL GEAR RETRACTABILITY

Номер: US20180104754A1
Автор: Houben Rudolf
Принадлежит:

Methods and apparatuses enabling/improving retractability of a first bevel gear that with at least one second bevel gear forms a transmission, performing: 1. A method for providing retractability of a first bevel gear defining a plurality of teeth configured to form a transmission with at least one second bevel gear defining a plurality of teeth , which is configured to be installed in a housing so that a rotational movement of the first bevel gear or the at least one second bevel gear is transferrable into a rotational movement of the other of the first bevel gear and the at least one second bevel gear , the method comprising: (A) determining with a computer whether one or more of (a) during said installation, the first bevel gear is engageable with the at least one second bevel gear via an axial insertion movement or (a) the first bevel gear is separable from engagement with the second bevel gear with via an axial retraction movement; and', (i) determining with a computer a flank modification for said teeth of one or more of the first bevel gear or the at least one second bevel gear configured to prevent said collision; and', '(ii) determining modified machine data based on said flank modification; and, '(B) when the determining step predicts a collision during said engagement or during said separation between at least one tooth of the first bevel gear and at least one tooth of the at least one second bevel gear], '(I) performing a retractability analysis including(II) finish machining at least one of said teeth with a bevel gear cutting machine based on the modified machine data and, in turn, providing said flank modification thereon.2. The method according to claim 1 , further comprising claim 1 , prior to step (I) claim 1 , generating design data for one or more of the first bevel gear or the at least one second bevel gear claim 1 , and generating first machine data configured for preliminary machining of teeth of one or more of the first bevel gear or the at ...

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Номер записи: 77
20-04-2017 дата публикации

METHOD FOR PRODUCING A PISTON FOR AN INTERNAL COMBUSTION ENGINE AND PISTON PRODUCED BY MEANS OF SAID METHOD

Номер: US20170107934A1
Автор: Bing Karlheinz, Mock Daniel, Petrowitsch Mathias
Принадлежит:

A method for producing a piston may include aligning at least two piston components along corresponding joining surfaces, activating a laser designed for deep-welding, and aligning a laser beam with a starting point. The method may then include increasing a power density of the laser beam over a first defined path along the joining surfaces to produce a weld seam with an increasing weld seam depth, deep welding along the joining surfaces to produce a deep weld seam with a substantially constant weld seam depth up to a defined end point, and reducing the power density over a second defined path to produce a weld seam with a decreasing weld seam depth. The method may further include overwelding at least part of at least one of the first and second defined paths by a laser designed for heat conduction welding to produce at least one heat conduction weld seam. 1. A method for producing a piston for an internal combustion engine having at least two piston components connected to one another along corresponding joining surfaces via at least one radially or axially circumferential laser weld seam , said method comprising:aligning the at least two piston components along the corresponding joining surfaces;activating a laser designed for deep-welding to generate a laser beam;aligning the laser beam with a defined starting point in a region of the corresponding joining surfaces;increasing a power density of the laser beam proceeding from the defined starting point over a first defined path along the corresponding joining surfaces to produce a ramp-up weld seam with an increasing weld seam depth;deep welding a circumferential, full through-welding along the corresponding joining surfaces to produce a deep weld seam with a substantially constant weld seam depth up to a defined end point;reducing the power density of the laser beam over a second defined path to produce a ramp-down weld seam with a decreasing weld seam depth; andoverwelding at least part of at least one of the ...

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Номер записи: 78
10-07-2014 дата публикации

PROCESS FOR PRODUCING A PISTON FOR AN INTERNAL COMBUSTION ENGINE AND PISTON FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20140190010A1
Автор: Baberg Arnd, Dörnenburg Frank Thomas Hugo, LADES KLAUS
Принадлежит:

In a process for producing a piston for an internal combustion engine, a groove is worked into a cast piston blank proceeding from a combustion chamber cavity () in a largely radial direction and then closed to form a cooling duct. A cast piston for an internal combustion engine has a closure which is fitted after the casting and the machining between the cooling duct and a combustion chamber cavity (). 1102016. A method for producing a piston () for an internal combustion engine , in which a groove is worked into a cast piston blank , proceeding from a combustion chamber cavity () , in a largely radial direction and is subsequently closed to form a cooling channel ().2. The method according to claim 1 ,characterized in that{'b': '18', 'the groove is closed by means of a metal sheet ().'}3. The method according to claim 2 ,characterized in that{'b': '18', 'the metal sheet () is remelted at least in areas.'}4. The method according to one of the preceding claims claim 2 ,{'b': 10', '14', '12, 'characterized in that further a radial groove is incorporated, proceeding from the outer side of the piston (), and filled with material (), and an annular groove () is worked out of this.'}510162018. A cast piston () for an internal combustion engine claim 2 , which comprises between the cooling channel () and a combustion chamber cavity () a closure () attached after the casting and the processing.6. The piston according to claim 5 ,{'b': '18', 'characterized in that the closure is a metal sheet ().'}7. The piston according to claim 6 ,characterized in that{'b': '18', 'the metal sheet () is remelted at least in areas.'}8. The piston according to one of to claim 6 ,{'b': 12', '14, 'characterized in that an annular groove () is provided which is formed in a material () that is filled into a groove formed from the outer side.'} The invention relates to a method for producing a piston for an internal combustion engine and to a piston for an internal combustion engine.With engine ...

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Номер записи: 79
18-04-2019 дата публикации

Bridged bi-aromatic ligands and olefin polymerization catalysts prepared therefrom

Номер: US20190111414A1
Автор: C. Jeff Harlan, Catherine Anne FALER
Принадлежит: Univation Technologies Llc

Disclosed are novel bridged bi-aromatic phenol ligands and transition metal catalyst compounds derived therefrom. Also disclosed are methods of making the ligands and transition metal compounds, and polymerization processes utilizing the transition metal compounds for the production of olefin polymers.

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Номер записи: 80
07-05-2015 дата публикации

MONOLITHIC, GALLERYLESS PISTON AND METHOD OF CONSTRUCTION THEREOF

Номер: US20150122212A1
Автор: Riffe Jeff, Weinenger Michael
Принадлежит:

A galleryless piston for an internal combustion engine and method of construction thereof are provided. The piston has a monolithic piston body extending along a central longitudinal axis. The piston body has an upper wall forming an upper combustion surface with first and second portions, with the first portion extending annularly along an outer periphery of the upper wall and the second portion forming a combustion bowl. The upper wall has an undercrown surface on an underside of the combustion bowl directly opposite the second portion of the upper combustion surface. The undercrown surface has an openly exposed 2-dimensional surface area, as viewed looking along the central longitudinal axis, between about 35-60 percent of an area defined by a maximum outer diameter of the piston body, thereby providing an expansive area against which oil being splashed or sprayed can freely contact to cool the piston. 1. A galleryless piston for an internal combustion engine , comprising:a monolithic piston body extending along a central longitudinal axis along which said piston reciprocates in a cylinder bore of an internal combustion engine, said piston body having an upper wall forming an upper combustion surface with an annular ring belt region depending from said upper combustion surface for receipt of at least one piston ring; a pair of skirt portions depending from said ring belt region to facilitate guiding the piston within a cylinder bore and having a pair of pin bosses providing a pair of laterally spaced pin bores aligned along a pin bore axis for receipt of a wrist pin; said upper combustion surface having first and second portions, said first portion extending annularly along an outer periphery of said upper wall and said second portion forming a combustion bowl depending radially inwardly from said first portion; said upper wall having an undercrown surface formed on an underside of said combustion bowl directly opposite said second portion of said upper ...

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Номер записи: 81
05-05-2016 дата публикации

METHOD OF MANUFACTURING METAL CORE FOR RESIN GEAR

Номер: US20160121439A1
Автор: FUJIMURA Hiroto, ISHIKI Nobumoto, MORI Takanobu, Suzuki Ryosuke, Tanaka Toru
Принадлежит:

A method of manufacturing a metal core for a resin gear is provided. The metal core has a boss portion into which a shaft is press-fitted and a ring portion to which an outer peripheral resin is joined. The method includes swaging a plate material having a center hole by pressing the plate material in an axial direction to form a swaged body, and forging the swaged body by pressing the swaged body in the axial direction under a higher pressure. The swaging includes deforming a portion around the center hole in the axial direction to form an inner circumferential swaged portion, and deforming an outer circumferential portion of the plate material in the same axial direction to form an outer circumferential swaged portion. The forging includes forming the inner circumferential swaged portion into the boss portion, and forming the outer circumferential swaged portion into the ring portion. 1. A method of manufacturing a metal core for a resin gear , the metal core comprising a boss portion into which a shaft is press-fitted , a ring portion having an outer circumferential surface provided with a concave-convex structure and to which an outer peripheral resin is joined , and a connecting portion via which the boss portion and the ring portion are coaxially provided , the method comprising:swaging a plate material having a center hole by pressing the plate material in an axial direction to form a swaged body; andforging the swaged body by pressing the swaged body in the axial direction under a higher pressure than the swaging to change the thickness of the swaged body,wherein the swaging comprises deforming a portion around the center hole of the plate material toward one side in the axial direction to form an inner circumferential swaged portion, and deforming an outer circumferential portion of the plate material toward the same side in the axial direction to form an outer circumferential swaged portion, andwherein the forging comprises forming the inner ...

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Номер записи: 82
05-05-2016 дата публикации

APPARATUS AND METHOD FOR MANUFACTURING COIL SCREENS

Номер: US20160121440A1
Автор: FUNK Michael-Heinz, RUH Michael, SCHRATZ Simon
Принадлежит: KARL MAYER TEXTILMASCHINENFABRIK GMBH

Apparatus and method for manufacturing coil screens. Apparatus includes a working surface having a first edge and a second edge; a joining device, which is structured and arranged to deposit coils on the working surface, being movable over the working surface in a direction of movement from the first edge to the second edge; and a slider, which is arranged on the working surface at least in a region of the first edge, being movable perpendicularly to the direction of movement of the joining device. 1. An apparatus for manufacturing coil screens comprising:a working surface having a first edge and a second edge;a joining device, which is structured and arranged to deposit coils on the working surface, being movable over the working surface in a direction of movement from the first edge to the second edge; anda slider, which is arranged on the working surface at least in a region of the first edge, being movable perpendicularly to the direction of movement of the joining device.2. The apparatus according to claim 1 , wherein the joining device comprises a displacement spur and the slider has a movement stroke that is at least equal to a width of the displacement spur.3. The apparatus according to claim 1 , further comprising a stop that is positionable on the working surface and along which the joining device is movable claim 1 ,wherein the slider is arranged between the stop and the working surface.4. The apparatus according to claim 1 , further comprising a holding-down arm claim 1 , which is positionable in a region of the slider claim 1 , that is structured and arranged to be movable between a covering position claim 1 , in which the coils positioned on the working surface are covered claim 1 , and a release position claim 1 , in which the coils positioned on the working surface are accessible by the joining device.5. The apparatus according to claim 1 , further comprising a covering device arranged at a distance from the working surface in a region of the first ...

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Номер записи: 83
03-05-2018 дата публикации

Method for manufacturing a piston

Номер: US20180119636A1
Автор: Klaus Keller, Rainer Scharp
Принадлежит: MAHLE International GmbH

A method for manufacturing a piston of an internal combustion engine from a piston upper part and a piston lower part may include producing at least the piston lower part as a forged steel part. A partial cross section of a cooling duct may be provided in the piston lower part. A closed supply inlet funnel may be forged within the piston lower part. The closed supply inlet funnel may be bored into the piston lower part from the cooling duct. A borehole may be introduced into the piston lower part obliquely to a piston axis. The piston lower part and the piston upper part may be welded to one another.

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Номер записи: 84
14-05-2015 дата публикации

SLIDING COMPONENT FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MANUFACTURING SLIDING COMPONENT FOR INTERNAL COMBUSTION ENGINE

Номер: US20150128894A1
Автор: Hayashi Takayuki, HIEJIMA Hiroyoshi, NIIMI Takuya, Okamoto Akihiro, OKAZAKI Ryo, Sugano Keiki
Принадлежит: AISIN SEIKI KABUSHIKI KAISHA

A sliding component for an internal combustion engine includes: a sliding component main body that includes a plurality of concave portions formed in a predetermined portion thereof; and a coating layer that covers a portion of the sliding component main body, in which the plurality of concave portions are not formed. 1. A sliding component for an internal combustion engine comprising:a sliding component main body that includes a plurality of concave portions formed in a predetermined portion thereof; anda coating layer that covers a portion of the sliding component main body, in which the plurality of concave portions are not formed.2. The sliding component for an internal combustion engine according to claim 1 ,wherein the coating layer is provided in a portion of the sliding component main body, which corresponds to the plurality of concave portions, and the coating layer includes a plurality of hole portions which allow the surfaces of the plurality of concave portions to be exposed therethrough, respectively.3. The sliding component for an internal combustion engine according to claim 2 ,wherein an oil reservoir is formed by both of the hole portion of the coating layer and the concave portion of the sliding component main body.4. The sliding component for an internal combustion engine according to claim 2 ,wherein an inner circumferential surface of the hole portion of the coating layer and an opening end edge of the concave portion of the sliding component main body have respective concentric circular shapes when seen in a direction in which a center line of the hole portion extends.5. The sliding component for an internal combustion engine according to claim 2 ,wherein the inner circumferential surface of the hole portion of the coating layer has an inner diameter greater than that of the opening end edge of the concave portion of the sliding component main body.6. The sliding component for an internal combustion engine according to claim 2 ,wherein the ...

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Номер записи: 85
27-05-2021 дата публикации

NET FORGED SPIRAL BEVEL GEAR

Номер: US20210154778A1
Автор: Benedict Dale K., Kolivand Mohsen, Moehlau Curt
Принадлежит:

A process for forming a finished spiral bevel gear includes forging a blank to form a forging having near net-shaped spiral bevel teeth, machining the forging, coining the forging to form a coined spiral bevel gear with net-shaped spiral bevel gear teeth; heat treating the coined spiral bevel and finishing the heat treated, coined spiral bevel gear without machining the net-shaped spiral bevel gear teeth in a machining operation that forms chips. 1. A process for providing a spiral bevel gear and a spiral bevel pinion gear , the process comprising:providing a blank;heating the blank to a temperature in excess of a predetermined temperature threshold;forging the heated blank while the heated blank is at a temperature in excess of the predetermined temperature threshold to produce a forging, the forging having a first side and a second side, the first side comprising a plurality of near net-shaped spiral bevel gear teeth, the forging being formed of metal;machining the second side of the forging to a predetermined distance from a portion of the near net-shaped spiral bevel gear teeth to form a machined forging;without machining the near net-shaped spiral bevel gear teeth, forming a coined gear by cold working the machined forging in a coining die to induce plastic flow in the near net-shaped spiral bevel gear teeth and form net-shaped spiral bevel gear teeth that conform to a desired tooth profile with a desired degree of accuracy, wherein each of the net-shaped spiral bevel gear teeth has a pair of flanks, and wherein the desired tooth profile includes a contour of the flanks of the net-shaped spiral bevel gear teeth;heat-treating the coined gear to form a heat-treated gear;providing a spiral bevel pinion gear; andfinishing the heat-treated gear without machining the net-shaped spiral bevel gear teeth in a chip forming operation to produce a finished spiral bevel gear;wherein the teeth of the finished spiral bevel gear that have a quality level in which the finished ...

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Номер записи: 86
12-05-2016 дата публикации

Method for Producing a Piston Pump

Номер: US20160129536A1
Автор: Huckenbeck Bernard, Juretko Martin, Zimmermann Marc
Принадлежит:

A method is used to produce a piston pump having a housing and a piston subassembly. The piston subassembly is displaceably guided in the housing and has a first, rod-like piston element and a second, sleeve-like piston element. The second piston element is connected to the first piston element via a press fit. At least one transverse bore and a longitudinal bore are arranged in the second piston element. A stop edge for the housing is arranged on the second piston element. The piston subassembly also has an inlet valve, which includes a receiving element, in which an inlet valve spring and an inlet valve sealing element are arranged. The piston subassembly also has a corresponding inlet valve seat, which is arranged on the second piston element. While the second piston element is being machined, the press fit and the longitudinal bore are produced and/or finished in one step.

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Номер записи: 87
12-05-2016 дата публикации

Method for Producing a Functional Shaft

Номер: US20160131181A1
Автор: Christoph Gremmelspacher, Joachim Echle, Markus Schuler
Принадлежит: Neuymayer Tekfor Holding GmbH

A device for producing a functional shaft and a functional shaft are provided in which a functional element which is provided with a pocket is inserted into a retaining element, a shaft is inserted into the pocket, and a force applied to the functional element while the shaft is being inserted into the pocket is measured.

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Номер записи: 88
21-05-2015 дата публикации

METHOD FOR PRODUCING A PISTON FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20150135533A1
Автор: Scharp Rainer
Принадлежит: MAHLE International GmbH

The invention relates to a method for producing a piston () for an internal combustion engine, having a main piston body () and a piston ring element (), wherein the main piston member () comprises at least one piston skirt () and at least one bottom region () of a combustion recess (). The piston ring element () comprises a piston crown (), at least one wall region () of the combustion recess (), a circumferential fire land () and at least one part of a circumferential ring part () provided with annular grooves. The main piston body () and the piston ring element () form a circumferential closed cooling duct (). The method is characterised by the following method steps: (a) providing a blank (′) of the main piston body (), in which an outer circumferential joining surface () and an inner circumferential joining surface (), which is widened in the direction of the bottom region () of the combustion recess (), as well as a circumferential lower cooling duct part () between the two joining surfaces () are rough-machined, (b) providing a blank (′) of the piston ring element () in which an outer annular joining surface () and an inner annular joining surface () as well as a circumferential upper cooling duct part () between the two joining surfaces () are rough-machined, (c) joining the blank (′) to the blank (′) via the joining surfaces () thereof in order to form a piston blank (′) in such a manner that at least in the bottom region () of the combustion recess () a sub-region () of the widened joining surface () of the blank (′) remains blank, (d) post-machining and/or finishing the piston blank (′) to form a piston () whilst removing the sub-region () of the widened joining surface (). 110110111111211211111151152712721121121121911928128211212212223123111111211224124: Method for production of a piston ( , ) for an internal combustion engine , having a basic piston body ( , ) and a piston ring element ( , ) , wherein the basic piston body ( , ) has at least a piston ...

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Номер записи: 89
31-07-2014 дата публикации

Device for Moving a Piston Inside a Cartridge

Номер: US20140214000A1
Автор: Ducret Maurice, Moia Franco, Mueller Marcel
Принадлежит: ROCHE DIAGNOSTICS INTERNATIONAL AG

A device for moving a piston inside a cartridge having a cartridge body and the piston displaceable along a longitudinal axis of the cartridge body is presented. The device comprises a first portion having first coupler for coupling the cartridge body to the first portion such that in both directions of the longitudinal axis, a connection exists between the cartridge body and the first portion; and a second portion having second coupler for coupling the piston to the second portion such that in both directions of the longitudinal axis, a connection exists between the piston and the second portion. The first and second portions move relative to each other to effect at least a forward displacement of the piston coupled to the second portion inside the cartridge body coupled to the first portion along the longitudinal axis. The second coupler establishes and releases the connection with the piston. 1. A device for moving a piston inside a cartridge having a cartridge body and a piston arranged therein displaceable along a longitudinal axis of the cartridge body , the device comprising:a first portion having first coupler for releasably coupling the cartridge body of the cartridge to the first portion in such a manner that in both directions of the longitudinal axis of the cartridge body, a positive and/or frictional connection between the cartridge body and the first portion exists; anda second portion having second coupler for releasably coupling the piston of the cartridge to the second portion in such a manner that in both directions of the longitudinal axis of the cartridge body, a positive and/or frictional connection between the piston and the second portion exists;wherein the first and second portions move relative to each other in order to effect at least a forward displacement of the piston coupled to the second portion inside the cartridge body coupled to the first portion along the longitudinal axis of the cartridge body, andwherein the second coupler ...

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Номер записи: 90
18-05-2017 дата публикации

GEAR

Номер: US20170138456A1
Автор: Dorner Wilhelm, Kümmeth Andreas, Lesch Michael, Michel Frank, Schreiber Heiko, Wilhelm Thomas
Принадлежит: Wittenstein SE

Gear mechanism, in particular coaxial gear mechanism or linear gear mechanism, having a toothing system, a tooth carrier with radially oriented guides, teeth which are received in the guides for engagement with the toothing system, the teeth being mounted in the guides such that they can be displaced radially relative to the tooth carrier in the direction of their longitudinal axis, a cam disk for radially driving the teeth, the tooth carrier comprising a first tooth carrier part and a second tooth carrier part. 1. Gear mechanism , in particular coaxial gear mechanism or linear gear mechanism , havinga toothing system,a tooth carrier with radially oriented guides,teeth which are received in the guides for engagement with the toothing system, the teeth being mounted in the guides such that they can be displaced radially relative to the tooth carrier in the direction of their longitudinal axis,a cam disk for radially driving the teeth,the tooth carrier comprising a first tooth carrier part and a second tooth carrier part.2. Gear mechanism according to claim 1 , the first tooth carrier part and the second tooth carrier part being connected by way of a connecting means.3. Gear mechanism according to claim 1 , the second tooth carrier part comprising at least two circumferential rows of guides claim 1 , which rows are arranged in parallel in the axial direction.41. Gear mechanism according to claim 1 , at least one bearing with rolling bodies being arranged between a housing of the gear mechanism () and the tooth carrier claim 1 , the rolling bodies lying directly on a tooth carrier bearing face of the tooth carrier and/or a housing bearing face of the housing.5. Gear mechanism according to claim 4 , the toothing system being configured integrally with the housing.6. Gear mechanism according to claim 4 , at least one part of the group of parts consisting of the tooth carrier bearing face and the housing bearing face claim 4 , and a rotational axis of the rolling bodies ...

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Номер записи: 91
28-05-2015 дата публикации

Transmission pulley, power transmission system comprising such a pulley, and method for producing such a pulley

Номер: US20150148162A1
Автор: Charles Chambonneau, Samuel Viault
Принадлежит: SKF AB

A transmission pulley, for a power transmission system including a belt having longitudinal grooves, having at least one end cap, a stack (E) of identical crowns, as well as means of connecting the crowns and the cap, parallel to a rotational axis (X10) of the pulley and rotating about this axis. The cap defines a hollow housing wherein half of the adjacent crown is engaged on one side of a median plane of the crown.

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Номер записи: 92
09-05-2019 дата публикации

GEAR ASSEMBLY FOR A WIND TURBINE GEARBOX HAVING A FLEXIBLE PIN SHAFT AND CARRIER

Номер: US20190136945A1
Автор: Bellucci Matteo, Davis John P., Hasan Raed Zuhair, Nies Jacob Johannes, Vandevoorde Kevin M., Wertz Aaron Joseph
Принадлежит:

A carrier and at least one pin shaft of a gearbox of a wind turbine and method of manufacturing same includes forming the carrier and the pin shaft(s) as a single part or separate components. Further, the method includes forming one or more voids in the pin shaft(s) and/or the carrier via additive manufacturing. As such, the void(s) is configured to increase flexibility of the pin shaft(s)/carrier so as to improve a load distribution thereof. 1. A method for manufacturing a gear assembly of a gearbox of a wind turbine , the method comprising:forming a carrier of the gear assembly;additively molding or printing at least a portion of at least one pin shaft of the gear assembly onto the carrier to form an integral part, the at least one pin shaft having a variable cross-section; and,forming one or more voids in the gear assembly via an additive manufacturing process, the one or more voids configured to increase flexibility of the at least one pin shaft so as to improve a load distribution of the carrier.2. The method of claim 1 , wherein the additive manufacturing process comprises at least one of binder jetting claim 1 , material jetting claim 1 , laser cladding claim 1 , cold spray deposition claim 1 , directed energy deposition claim 1 , powder bed fusion claim 1 , material extrusion claim 1 , or vat photopolymerisation.3. The method of claim 1 , further comprising forming at least one additional feature into the at least one pin shaft via additive manufacturing claim 1 , wherein the at least one additional feature comprises at least one of an oil path claim 1 , one or more ribs or structural supports on and interior surface of one or more of the voids claim 1 , a cooling channel claim 1 , an inspection path claim 1 , a void removal feature claim 1 , a signal wiring path claim 1 , a sensor recess claim 1 , or a locating feature.4. The method of claim 1 , further comprising forming the carrier and the at least one pin shaft as the single part claim 1 , at least in ...

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Номер записи: 93
07-05-2020 дата публикации

METHOD FOR MANUFACTURING RACK BAR

Номер: US20200139494A1
Автор: ISHIKI Nobumoto, NOMURA Makoto, Suzuki Ryosuke, YAMAWAKI Takashi
Принадлежит: NETUREN CO., LTD.

A method for manufacturing a rack bar includes joining axial end portions of first and second bar members to each other, and forming a power transmission section on the second bar member. The first bar member has a toothed portion. When the second bar member is hollow, the method may further include thickening a wall of a portion of the second bar member along the axial direction so as to be coaxial with the first bar member. When the second bar member has a greater diameter than the first bar member, the method may further include cutting an outside diameter of a portion of the second bar member in the axial direction so as to be coaxial with the first bar member. The power transmission section is formed on the portion of the second bar member where the wall has been thickened and/or the outside diameter has been cut. 16-. (canceled)7. A method for manufacturing a rack bar , the method comprising:joining an axial end portion of the first bar member and an axial end portion of a second bar member to each other, the first bar member having a toothed portion along an axial direction, the toothed portion having a plurality of rack teeth, and the second bar member having a greater diameter than the first bar member,cutting an outside diameter of at least a portion of the second bar member, that has been joined to the first bar member, in the axial direction such that portion of the second bar member is coaxial with the first bar member, andforming a power transmission section on the portion of the second bar member where the outside diameter has been cut.8. The method according to claim 7 , further comprising performing a heat-treatment on the power transmission section formed on the second bar member.9. The method according to claim 7 , wherein the first bar member and the second bar member are joined to each other by a friction welding claim 7 , the friction welding including rotating the first bar member and the second bar member relative to each other around a ...

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Номер записи: 94
11-06-2015 дата публикации

NOZZLE PLATE, METHOD OF MANUFACTURING NOZZLE PLATE, INKJET HEAD, AND INKJET PRINTING APPARATUS

Номер: US20150158300A1
Автор: Abe Yukiko, Matsumoto Shinji, Nakamura Yuki, Saotome Ryoichi, Sone Yuji, Takada Mikiko, Ueda Naoyuki
Принадлежит:

A nozzle plate having a nozzle hole that penetrates through the nozzle plate in a thickness direction is disclosed. The nozzle plate includes a discharge outlet that is formed at the nozzle hole, and provided curvatures of four corner portions of an opening shape of the discharge outlet are denoted as R1, R2, R3, and R4, the opening shape of the discharge outlet is configured to approximate the equation R1=R2≧R3=R4≈0. 1. A nozzle plate having a nozzle hole that penetrates through the nozzle plate in a thickness direction , the nozzle plate comprising:a discharge outlet formed at the nozzle hole, wherein provided curvatures of four corner portions of an opening shape of the discharge outlet are denoted as R1, R2, R3, and R4, the opening shape of the discharge outlet is configured to approximate R1=R2≧R3=R4≈0.2. The nozzle plate as claimed in claim 1 , further comprising:a first substrate including a bonding surface on which a groove is formed;a second substrate including a surface that is bonded to the bonding surface of the first substrate; anda discharge outlet formed at the nozzle hole; whereinthe first substrate and the second substrate are bonded together and cut in a direction substantially perpendicular to a longitudinal direction of the groove formed on the bonding face of the first substrate;the discharge outlet is formed on a cut surface of the first substrate and the second substrate that are bonded together; andprovided curvatures of four corner portions of an opening shape of the discharge outlet are denoted as R1, R2, R3, and R4, the opening shape of the discharge outlet is configured to approximate R1=R2≧R3=R4≈0.3. The nozzle plate as claimed in claim 1 , whereina material of the nozzle plate includes a dielectric material with chemical durability.4. The nozzle plate as claimed claim 1 , whereinthe nozzle hole includes a nozzle flow path portion that is in communication with the discharge outlet, and the nozzle flow path portion is arranged to have a ...

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Номер записи: 95
31-05-2018 дата публикации

METHOD FOR GENERATING A TOOTH PROFILE OF A WHEEL ENGAGING WITH A ROLLER PINION

Номер: US20180149258A1
Автор: WICKER Paul
Принадлежит: SAFRAN LANDING SYSTEMS

Method for generating a tooth space profile () between two teeth () of a wheel () engaging with a roller () pinion () in a reference plane perpendicular to a central axis (X) whose intersection with the reference plane defines a centre (C), comprising the step of defining a nominal tooth space with symmetrical first and second profiles so that the space is suitable for receiving a roller which comes into contact, without clearance, with the facing active portions of the first and second profiles at the level of a primitive diameter. The method of the invention comprises the steps of deforming the bottom portion () of the first profile so that the bottom point is brought nearer to the centre by an amount equal to a given radial clearance, and moving the first profile angularly through a given angular half-clearance around the centre to shift it away from the radial axis. 1541321Defining, in the reference plane, a radial reference axis (Δ) of a tooth space passing through the centre (C);{'b': 11', '12, 'Defining a first tooth side profile comprising a trochoidal active portion () intended to come into contact with a roller and extending to a circle delimiting a crest of the teeth, and a bottom portion () extending until it intersects the radial reference axis at a bottom point (F) on a tangent perpendicular to the radial axis;'}Defining a second side profile, symmetrical to the first profile with respect to the radial axis, to delimit a nominal tooth space suitable for receiving a roller which comes into contact without clearance with the facing active portions of the first and second profiles at the level of a primitive diameter;characterized in that the method comprises the following steps, performed before the step of defining the second profile:{'b': '12', 'Deforming the bottom portion () of the first profile so that the bottom point is brought nearer to the centre by an amount equal to a given radial clearance (JR);'}Moving the first profile angularly through a ...

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Номер записи: 96
09-06-2016 дата публикации

MUD MOTOR ASSEMBLY

Номер: US20160160564A1
Автор: Skerl Damir S., Skerl Tomislav, VAIL III WILLIAM BANNING
Принадлежит: SMART DRILLING AND COMPLETION, INC.

A longer-lasting, lower cost, more powerful, all metal, mud motor than the presently available progressing cavity type mud motors for drilling boreholes into the earth. A mud motor apparatus possessing one single drive shaft that turns a rotary drill bit, which apparatus is attached to a drill pipe which provides high pressure mud to the mud motor, wherein the drive shaft receives at least a first portion of its rotational torque from any high pressure mud flowing through a first hydraulic chamber within the apparatus, and receives at least a second portion of its rotational torque from any high pressure mud flowing through a second hydraulic chamber within the apparatus. The mud motor apparatus possesses two hydraulic chambers, each having its own power stroke, and return stroke, and acting together in a controlled fashion, provide continuous power to a rotary drill bit. 1. A method to add a flared portion means to a loosely fitting piston means that forms a moving hydraulic seal within a pressurized hydraulic chamber so as to reduce any flow rate of fluids bypassing said loosely fitting piston means.2. A method to add a flared portion means to a loosely fitting piston means that forms a moving leaking seal within a pressurized hydraulic chamber so as to reduce any mud flow rate of fluids bypassing said leaking seal.3. A method to provide torque and power to a rotary drill bit rotating clockwise attached to a drive shaft of a mud motor assembly comprising at least the following steps:a. providing relatively high pressure mud from a drill pipe attached to an uphole end of said mud motor assembly;b. passing at least a first portion of said relatively high pressure mud through a first hydraulic chamber having a first piston that rotates a first crankshaft clockwise about its own rotation axis from its first relative starting position at 0 degrees through a first angle of at least 210 degrees, but less than 360 degrees during its first power stroke;c. mechanically ...

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Номер записи: 97
23-05-2019 дата публикации

Method for Processing and Manufacturing a Metal Structural Material by a Coiling, Sintering and Plastic Working of a Metal Screen Mesh

Номер: US20190151953A1
Автор: Zhaoyao Zhou
Принадлежит: South China University of Technology SCUT

Provided is a method for processing and manufacturing a metal structural material by knitting metal wires into metal screen mesh strips, tightly coiling the metal screen mesh strips to form a coiled blank body which is coated layer-by-layer and in which an outer-layer material tightly covers an inner-layer material; sintering the coiled blank body; reducing gaps within the coiled blank body material by plastic processing, to reach a porosity that fulfills requirements, and manufacturing mechanical structural parts.

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Номер записи: 98
08-06-2017 дата публикации

MACHINE FOR MACHINING GEAR TEETH AND GEAR TEETH MACHINING METHOD

Номер: US20170157690A1
Автор: BITTNER Edward H.
Принадлежит:

A machine for machining a workpiece having a first central longitudinal axis passing through a workpiece plane that is disposed orthogonally relative to the first central longitudinal axis is provided. The machine includes a chuck or fixture on which the workpiece is disposable, a grinding spindle having a body, a wheel supporting an abrasive and an insulator electrically isolating the wheel from the body, the wheel being operable to remove material from the workpiece, the grinding spindle having a second central longitudinal axis about which the grinding spindle rotates, the second central longitudinal axis of the grinding spindle passing through the workpiece in the workpiece plane so as to create a continuous gear tooth on the workpiece and an electrochemical grinding (ECG) element configured to execute ECG processing on the grinding spindle and the workpiece to soften the workpiece as the gear tooth is being created by the grinding spindle. 1. A machine for machining a workpiece having a first central longitudinal axis passing through a workpiece plane , the workpiece plane being disposed orthogonal to the first central longitudinal axis , the machine comprising:a grinding spindle having a body, a wheel supporting an abrasive and an insulator electrically isolating the wheel from the body, the wheel being operable to remove material from the workpiece, the grinding spindle having a second central longitudinal axis about which the grinding spindle rotates, the second central longitudinal axis of the grinding spindle passing through the workpiece in the workpiece plane so as to create a continuous gear tooth on the workpiece; andan electrochemical grinding (ECG) element electrically connected to the wheel and the workpiece, the ECG element being configured to execute ECG processing on the grinding spindle and the workpiece to soften the workpiece as the gear tooth is being created by the grinding spindle.2. The machine according to claim 1 , wherein the abrasive ...

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Номер записи: 99
08-06-2017 дата публикации

PISTON WITH SEALED COOLING GALLERY CONTAINING A THERMALLY CONDUCTIVE COMPOSITION

Номер: US20170159604A1
Автор: Azevedo Miguel, Lineton Warran Boyd
Принадлежит:

A heavy duty piston for an internal combustion engine comprises a thermally conductive composition filling 10 to 90 vol. % of a sealed cooling gallery. The thermally conductive composition includes bismuth and/or tin. For example, the thermally conductive composition can be a single-phase binary mixture of bismuth and tin. The thermally conductive composition has improved thermal properties, for example a melting point around 139° C., a thermal conductivity around 22 W/m·K, and a thermal diffusivity around 1.43 E-5 m/s. The thermally conductive composition is not reactive and does not include toxic or cost-prohibitive metals. During high temperature operation, as the piston reciprocates in the cylinder bore, the thermally conductive composition flows throughout the cooling gallery to dissipate heat away from the upper crown and thus improve efficiency of the engine. 1. A piston for an internal combustion engine , comprising:a body portion including an upper crown and a cooling gallery extending along least a portion of said upper crown, said cooling gallery being sealed;a thermally conductive composition disposed in said cooling gallery; andsaid thermally conductive composition including at least one of bismuth and tin.2. The piston of claim 1 , wherein said bismuth is present in an amount greater than or equal to 0 to 95 wt. % and said tin is present in an amount of 5 to 100 wt. % claim 1 , based on the total weight of said thermally conductive composition.3. The piston of claim 1 , wherein said thermally conductive composition consists only of said tin and/or said bismuth.4. The piston of claim 1 , wherein said thermally conductive composition is a binary mixture.5. The piston of claim 1 , wherein said thermally conductive composition has a melting point of 139 to 250° C. claim 1 , a thermal conductivity of 16 to 31 W/m·K claim 1 , and a thermal diffusivity of 1.13 E-5 m/s to 1.86 E-5 m/s.6. The piston of claim 1 , wherein said thermally conductive composition ...

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Номер записи: 100