Method for producing a small thin-walled tube from a magnesium alloy

The invention relates to a method for producing a small thin-walled tube for a medical application or for a medical product, in particular for a stent, wherein a blank of an in particular bioresorbable magnesium alloy is deformed to produce a small tube, after which the small tube is used for medical purposes or from which the medical product, such as a stent, can be made. In order to be able to produce the small tube in one step and with high precision, it is provided according to the invention that a male die ( 2 ) with a base body ( 3 ) and a mandrel ( 4 ) tapered relative to the base body ( 3 ) and the blank is provided with a blind hole or an opening, wherein a diameter of the blind hole or the opening of the blank is equal to or greater than an outer diameter of the mandrel ( 4 ), after which the blank with inserted mandrel ( 4 ) with the male die ( 2 ) is pressed forwards at least in part through a female die ( 5 ) with a receiving region ( 6 ) and a contouring region ( 7 ), wherein the contouring region ( 7 ) has a free diameter, which is larger than the outer diameter of the mandrel ( 4 ), but smaller than an outer diameter of the blank, in order to form the small tube.

Apparatus and method for drawing metal tube

In an apparatus for drawing a metal tube in which lubrication oil is ejected from an ejecting opening formed in a hollow rod supporting a plug to apply the lubrication oil onto an inner surface of a raw tube, the lubrication oil ejection responsiveness when a discontinuous lubrication oil supply is performed is enhanced. In the drawing apparatus in which a metal raw tube ( 2 ) is processed by passing the same between a die ( 10 ) for forming an outer surface and a plug ( 11 ) for forming an inner surface, an ejecting opening ( 21 ) from which lubrication oil (L) is ejected opens into an outer peripheral surface of a hollow rod ( 20 ) supporting the plug ( 11 ). The ejecting opening ( 21 ) is provided only in a region of the rod ( 20 ) higher than the center thereof in the up-and-down direction.

Rotary sputter target assembly

This invention utilizes a co-extrusion or co-drawing process to directly bond a tubular target to an inner backing tube. The co-extrusion or co-drawing process reduces the inner and outer diameters of the outer tubular target to cause portions of the target to protrude and at least partially fill into grooves along the inner backing tube. The filling causes the target to interlock to the backing plate.

METHOD FOR PRODUCING DOUBLE-WALL TUBE WITH BRAIDED WIRES AT ITS INTERFACE

Provided is a method for producing a double-wall tube with braided wires at its interface in which the braided wires are interposed between an outer-wall and inner-wall blank tubes and then a drawing process is applied so as for the braided wires to be brought into close contact with the inner surface of the outer-wall tube and the outer surface of the inner-wall tube, the method comprising: polishing the inner surface of the outer-wall blank tube and the outer surface of the inner-wall blank tube so that a surface roughness thereof satisfies Ra<1.0 μm, followed by interposing the braided wires between the outer-wall and inner-wall blank tubes; performing a sinking drawing process so that the difference of the outer diameter of the resulting double-wall tube relative to a die bore diameter is 0.1 mm to 0.3 mm; and subsequently performing heat treatment. The double-wall tube produced is suitable as a heat-transfer tube. 1. A method for producing a double-wall tube with braided wires at its interface in which braided wires are interposed between an outer-wall blank tube and an inner-wall blank tube , and then a drawing process is applied so as for the braided wires to be brought into close contact with the inner surface of the outer-wall tube and the outer surface of the inner-wall tube , the method comprising:polishing the inner surface of the outer-wall blank tube and the outer surface of the inner-wall blank tube so that a surface roughness thereof satisfies Ra<1.0 μm in terms of arithmetic average roughness (Ra), followed by interposing the braided wires between the outer-wall and inner-wall blank tubes;performing a sinking drawing process so that the difference of the outer diameter of the resulting double-wall tube relative to a die bore diameter is 0.1 mm to 0.3 mm; andsubsequently performing heat treatment.2. The method for producing a double-wall tube with braided wires at its interface according to claim 1 , wherein a tapered die having an included angle of ...

LINEAR DRAWING MACHINE AND METHOD FOR LINEAR DRAWING OF A WORKPIECE THROUGH A DRAWING RING

In order to allow a more targeted intervention in a drawing procedure, in particular on a linear drawing device, the invention proposes a linear drawing machine for the linear drawing of a workpiece through a drawing ring, a drawing unit, in which one or more drawing tools grasp the workpiece and draw it linearly in the drawing direction, being situated behind the drawing ring, the linear drawing device being distinguished in particular by a drawing ring which is situated fixed in relation to the drawing direction during the drawing procedure, preferably perpendicularly, and by a workpiece guide situated in front of the drawing ring in the drawing direction, which is displaceable perpendicular to the drawing direction. 1171078108251011030130810819119810881083013081082012081088108. A linear drawing machine () for the linear drawing of a workpiece (; ) through a drawing ring (; ) , a drawing unit () , in which one or more drawing tools () grasp the workpiece (; ) and draw it linearly in the drawing direction (; ) being situated behind the drawing ring (; ) , wherein a measuring unit (; ) is situated in the area of the drawing ring (; ) , in the drawing ring (; ) or in the drawing direction (; ) in front of the drawing ring (; ) , using which the mass distribution of the workpiece material ( , ) can be measured in the area of the drawing ring (; ) or in the drawing ring (; ).217107111118108111113013030130. The linear drawing machine () according to for the linear drawing of a tubular workpiece (; ) having a drawing mandrel (; ) provided at the height of the drawing ring (; ) claim 1 , wherein the drawing mandrel (; ) is mounted freely opposite to the drawing direction (; ) perpendicular to the drawing direction (; ).31810830130211218108301303930130. The linear drawing machine () according to claim 1 , further comprising a drawing ring (; ) claim 1 , which is situated fixed claim 1 , preferably perpendicularly claim 1 , during the drawing procedure relative to the ...

HOLLOW DRIVE SHAFT WITH FLANGE AND METHOD FOR THE PRODUCTION THEREOF

A method for producing a tubular, hollow drive shaft, in particular a cardan shaft, from a pre-tube, in particular a longitudinally welded, normalized steel tube, which is extended by having the wall thickness thereof reduced at least sectionally by way of single or multiple ironing or another cold forming operation and/or by having the inner diameter and/or outer diameter thereof changed, wherein at least one pre-tube end or shaft end is configured into a flange that is integrated in one piece by to way of cold forming. 1110302. A method for producing a tubular , hollow drive shaft () , which is a cardan shaft , from a pre-tube () , which is a longitudinally welded , normalized steel tube , and which is extended by having the wall thickness thereof reduced at least sectionally by way of single or multiple ironing or another cold forming operation or by having the inner diameter or outer diameter thereof changed , characterized in that at least one pre-tube end () or shaft end is configured into a flange () that is integrated in one piece by way of cold forming.210291. The method according to claim 1 , characterized in that a portion (I claim 1 , II) of the pre-tube () not associated with the flange () or not adjoining the flange is ironed claim 1 , or changed by way of cold forming claim 1 , in such a way that a portion (III claim 1 , ) of the drive shaft () associated with the flange or adjoining the flange has the thickest wall (D).3302. The method according to claim 2 , characterized in that the cold forming operation of the pre-tube or shaft end () to obtain the flange () includes single or multiple ironing operations of the end and subsequent bending of the end.4301043843384355. The method according to claim 3 , in which as part of the formation of the flange claim 3 , in a pre-forming step the wall at the end () of the pre-tube () is given an angled position with respect to a tube center axis () by way of an at least sectionally conical bending punch () claim ...

Process for manufacturing seamless steel pipe, hollow spring utilizing seamless steel pipe

There are provided: a seamless steel pipe formed from a cylindrical steel material billet through a hot isostatic extrusion step, wherein a depth of a contiguous flaw formed on an inner periphery surface and an outer periphery surface of the steel pipe is 50 μm or less; a hollow spring obtained by forming a hollow body in a shape of a coil or a bar or a bar with curved part from the seamless steel pipe made of spring steel and applying a surface treatment to the hollow body so that the hollow body has compressive residual stress; and a method for producing seamless steel pipe including: a billet molding step; a first heating step; a hot isostatic extrusion step; a second heating step; an extension step; a third heating step; and a pickling step.

METHOD FOR MANUFACTURING DRIVE SHAFT

Disclosed in a method for manufacturing a drive shaft which comprises forming a first shaft unit by shrinking one side of a metallic pipe which has a uniform first strength; decreasing the thickness of an intermediate portion of the metallic pipe by drawing the intermediate portion of the metallic pipe which is integral with the first shaft unit forming at an inner side surface of the other side of the metallic pipe a strength decrease unit which has a second strength smaller than the first strength, by heat-treating by a predetermined distance the inner side surface of the other side being opposite to one side of the metallic pipe; and forming a second shaft unit without transforming any portion of the intermediate portion by shrinking the metallic pipe which has the strength decrease unit, wherein the second shaft unit is formed by applying compression force to a portion where the strength decrease unit in the metallic pipe is formed, in a predetermine direction being vertical with respect to the axial direction of the metallic pipe. 1. A method for manufacturing a drive shaft , comprising:forming a first shaft unit by shrinking one side of a metallic pipe which has a uniform first strength;decreasing the thickness of an intermediate portion of the metallic pipe by drawing the intermediate portion of the metallic pipe which is integral with the first shaft unit;forming at an inner side surface of the other side of the metallic pipe a strength decrease unit which has a second strength smaller than the first strength, by heat-treating by a predetermined distance the inner side surface of the other side being opposite to one side of the metallic pipe; andforming a second shaft unit without transforming any portion of the intermediate portion by shrinking the metallic pipe which has the strength decrease unit,wherein the second shaft unit is formed by applying compression force to a portion where the strength decrease unit in the metallic pipe is formed, in a ...

ANNEALING AND DRAWING DEVICE FOR OXYGEN-FREE COPPER TUBE USED FOR MOBILE PHONE HEAT PIPE WITH LARGE DIAMETER-WALL THICKNESS RATIO

An annealing and drawing device for an oxygen-free copper tube used for a mobile phone heat pipe with a large diameter-wall thickness ratio, a drawing die is installed in a box body. An annealing tube is installed between the drawing die and the box body; a fixing plate is disposed on a side of the drawing die; a supporting roller is rotatably connected to the fixing plate. A tension adjusting mechanism is disposed on a side of the supporting roller. An outer side of an end of the box body is provided with a mounting plate. A supporting frame is fixed on a side of an upper end of the mounting plate, a servo motor is fixed at an upper end of the supporting frame, and a rotating shaft is fixed at an end of an output shaft of the servo motor. The rotating shaft is in key joint with a winding wheel. 112132143523516576217889810911101112111013. An annealing and drawing device for an oxygen-free copper tube used for a mobile phone heat pipe with a large diameter-wall thickness ratio , comprising a box body () , wherein a drawing die () is installed at the middle in the box body () , an annealing tube () is installed between the drawing die () and an inner wall of the box body () , an induction heating wire () is wound around the annealing tube () , a fixing plate () is disposed on a side of the drawing die () away from the annealing tube () , the fixing plate () is installed at a bottom end of the box body () , and a supporting roller () is rotatably connected to the fixing plate (); a tension adjusting mechanism () is disposed on a side of the supporting roller () away from the drawing die () , an outer side of an end of the box body () close to the tension adjusting mechanism () is provided with a mounting plate () , and the mounting plate () is mounted on the ground; a supporting frame () is fixed on a side of an upper end of the mounting plate () , a servo motor () is fixed at an upper end of the supporting frame () , and a rotating shaft () is fixed at an end of an ...

PREPARING A TUBE END FOR ROD DRAWING

An apparatus for preparing a tube end for rod drawing with a floating mandrel has a releasable holder for the tube end centered on an axis, a frustoconical and spreadable floating mandrel, and a device for inserting the mandrel into the tube end and spreading the mandrel to flare the tube end. The apparatus further has a feed mechanism for inserting the floating mandrel into the tube end and/or a deforming device for making at least one indentation in the tube for holding the floating mandrel. 1. An apparatus for preparing a tube end for rod drawing with a floating mandrel , the apparatus comprising:a releasable holder for the tube end centered on an axis;a frustoconical and spreadable floating mandrel; andmeans for inserting the mandrel into the tube end and spreading the mandrel to flare the tube end.2. The apparatus defined in claim 1 , further comprising:a deforming device for forming a first indentation in the tube for gripping the floating mandrel.3. The apparatus defined in claim 1 , wherein the mandrel has an injector for introducing drawing oil into the tube.4. The apparatus defined in claim 2 , wherein the deforming device form the first indentation axially in front of the mandrel and a second indentation axially behind the mandrel and spaced from the first mandrel.5. The apparatus defined in claim 4 , wherein the mandrel has a head axially captured in the tube between the indentations.6. The apparatus defined in claim 4 , wherein the tube can be held by the first indentation in a form-fitting manner axially of the tube when the spreadable mandrel widens the tube end.7. The apparatus defined in claim 2 , wherein the deforming device has at least two pressing pins spaced axially from one another and pressable independently of one another against the tube end.8. The apparatus defined in claim 1 , further comprising:a pointing press for imparting a pointed shape to the tube end for drawing tongs after introduction of the floating mandrel.9. A method for ...

Method for preparing multilayer metal composite pipe

A method for preparing a multilayer metal composite pipe includes steps of: internally and externally grinding blank pipes; cleaning oil stains; assembling a multilayer metal pipe; drawing to reduce a diameter; performing high-speed friction welding at the pipe ends; performing heat treatment; performing four-roller cross-rolling; straightening; performing two-roller cold-rolling; performing cold-drawing to reduce the diameter; performing cold-expansion to reduce the diameter; performing precise cold-rolling; degreasing; brightening; performing surface grinding; cleaning dust; detecting multilayer metal interface bonding; detecting flaws; testing metal structure performance; and sizing and packaging. By cycling the cold-drawing, the cold-expansion, and the precision cold-rolling, key indicators such as product dimensional accuracy, surface quality, material properties, and crystal grain size can be collaboratively controlled, so as to achieve higher accuracy, better performance, and more outstanding extreme specifications. The present invention solves the problem of inconsistent extension due to differences in metal properties. 1. A method for preparing a multilayer metal composite pipe , comprising steps of:{'b': '101', '1) externally grinding blank pipes: grinding external surfaces of metal blank pipes () to eliminate oxide films on the external surfaces and spiral joints caused by a previous process;'}{'b': '101', '2) internally grinding the blank pipes: grinding internal surfaces of the metal blank pipes () to eliminate oxide films on the internal surfaces and quality defects caused by the previous process, and producing micro-grooves on the internal surfaces of the blank pipes; wherein no micro-groove is produced on an internal surface of an innermost pipe of the multilayer metal composite pipe;'}{'b': '101', '3) cleaning oil stains: cleaning the internal surfaces and the external surfaces of metal blank pipes () ground in the step 2 to remove grits, metal ...

METHOD FOR REINFORCING AND CALIBRATING A PIPE PORTION

A method and a device for producing an outer pipe of a telescope-like support, for reasons of weight and stability, is produced from a standardized zinc-coated steel pipe having a large outer diameter and a small wall thickness. Also included is the telescope-like support and the outer pipe which is contained therein. A pipe portion of the outer pipe is expanded in the method with a punch and subsequently tapered to the original outer diameter again with a ring. A reinforcement of the pipe portion and a calibration of the outer diameter of the pipe portion are thereby achieved. An outer thread can be rolled on the pipe portion. 1. A method for reinforcing and calibrating of at least a thin-walled pipe portion of an outer pipe of a telescope-like support for the construction sector , comprises the steps of:a) pushing a ring onto the pipe portion, whereby the inner diameter of the ring corresponds to the outer diameter of the pipe portion;b) inserting a punch into the pipe portion, the outer diameter of the punch being greater than the inner diameter of the pipe portion thus expanding the pipe portion;c) pulling the punch out of the pipe portion;d) covering the expanded pipe portion with the ring, thus tapering the expanded pipe portion;wherein step d) is performed after step c) or simultaneously with step c), wherein a thread is at least partially rolled on the pipe portion processed by the method.2. The method according to claim 1 , wherein the punch and the ring are guided with fixed spacing with respect to each other.3. The method according to claim 1 , including the step of rolling an outer thread at least partially on the pipe portion processed by the method.4. The method according to claim 2 , including the step of rolling an outer thread at least partially on the pipe portion processed by the method.5. The method according to claim 1 , including the step of rolling a thread in the form of a trapezoidal thread having a flank angle of less than 15° on the pipe ...

SENSOR FOR A HIGH-PRESSURE LINE, AND METHOD FOR PRODUCING SAME

Sensor for high-pressure line and method for manufacturing thereof. The sensor detects parameters or properties of fluid conducted in a high-pressure line while maintaining the high pressure of the fluid. The sensor includes an inner tube extending concentrically in the outer tube that together form a tube and at least one groove which extends in the inner surface of the outer tube or in the outer surface of the inner tube in a longitudinal direction, at least one signal line arranged in the groove, and at least one pick-up element connected to the signal line and arranged at least in the groove or in at least one recess which is provided at least in the outer surface of the inner tube or in the inner surface of the outer tube in addition to the at least one groove. The outer tube is in frictional connection with the inner tube. 1. A sensor for a high-pressure line comprising:an outer tube of metal with an outer surface, an inner surface, an outer diameter and an inner diameter, and an inner tube of metal with an outer surface, an inner surface, an outer diameter and an inner diameter, wherein the inner tube extends concentrically in the outer tube such that the inner tube and the outer tube together form a tube, and wherein the overall wall thickness measured as half of the difference between the outer diameter of the outer tube and the inner diameter of the inner tube is equal to or larger than the inner diameter of the inner tube;at least one groove extending in a longitudinal direction of the tube in the inner surface of the outer tube or in the outer surface of the inner tube;at least one signal line placed in the groove; and,at least one pick-up element connected to the signal line,wherein the pick-up element is placed at least in the groove or in at least one recess provided in addition to the groove at least in the outer surface of the inner tube or in the inner surface of the outer tube, andwherein the outer tube is in a frictional connection with the inner ...

A MANDREL ADJUSTMENT ASSEMBLY FOR A MULTI-WALL PIPE PRODUCTION MADE OF COATED METAL SHEET

Invention relates to is a mandrel adjustment assembly for multi-wall pipe made of a coated metal sheet comprising; a bearing positioning an elongated mandrel over a tray by holding; a distance adjustment unit having an adjustment member adjusting a stroke distance of mandrel by changing axial location of bearing; a first support and a second support holding mandrel over a tray such that the mandrel is freely movable between a distal end and an opposite proximal end. A distance adjustment unit is equipped with a display enabling visual access to a stroke distance set by an adjustment arm and the distance adjustment unit move the mandrel over the tray providing a displacement equal to stroke distance. 1. A mandrel adjustment assembly for multi-wall pipe made of a coated metal sheet comprising; a bearing positioning an elongated mandrel over a tray by holding; a distance adjustment unit having an adjustment member adjusting a stroke distance of mandrel by changing axial location of bearing; a first support and a second support holding mandrel over a tray such that the mandrel is freely movable between a distal end and an opposite proximal end characterized in that distance adjustment unit is equipped with a display enabling visual access to a stroke distance set by an adjustment arm and the distance adjustment unit move the mandrel over the tray providing a displacement equal to stroke distance.2. The mandrel adjustment assembly according to claim 1 , wherein a holding arm on which the display is adapted to measure the stroke distance and moving while pushing the bearing supported by the tray from one end thereof.3. The mandrel adjustment assembly according to claim 2 , wherein a housing on which the display is mounted and the holding arm telescopicaly received is secured to the bearing.4. The mandrel adjustment assembly according to claim 3 , wherein the holding arm is vertically positioned at the support edge of tray from a free end of the tray.5. The mandrel ...

Method for producing metal cylinder, method for producing substrate for electrophotographic photoconductor, method for manufacturing electrophotographic photoconductor, and metal slug for impact pressing

A method for producing a metal cylinder includes preparing a metal slug having a polished surface, and molding the metal slug into a cylinder by impact-pressing with the polished surface as a bottom.

Method of Manufacturing Two Tubes Simultaneously and Machine for Use Therein

A method is used to manufacture a tube having a hollow interior for housing an axle shaft. The tube is formed in a single machine having a fixed base and a single press structure movable toward the fixed base. The single machine includes first and second die assemblies coupled to the fixed base and first and second mandrels coupled to the single press structure. The method includes the steps of placing a billet into the first die assembly, pressing the billet into the first die assembly with the first mandrel to producing a pre-formed billet, and moving the pre-formed billet from the first die assembly to the second die assembly. THE method further includes the steps of pressing the pre-formed billet into the second die assembly with the second mandrel to elongate the pre-formed billet and form a hollow interior therein to produce an extruded tube. 141-. (canceled)42. A method of manufacturing a tube having a hollow interior for housing an axle shaft , which transmits rotational motion from a prime mover to a wheel of a vehicle , with the tube formed in at least a first machine and a second machine each having a fixed base and a press structure movable toward the fixed base , a first die assembly coupled to the fixed base of the first machine , a second die assembly coupled to the fixed base of the first machine and further defined as an initial stage second die assembly and a later stage second die assembly , a first mandrel coupled to the press structure of the first machine , a second mandrel coupled to the press structure of the first machine and spaced from the first mandrel further defined as an initial stage second mandrel and a later stage second mandrel , a third die assembly coupled to the fixed base of the second machine , and a third mandrel coupled to the press structure of the second machine , said method comprising the steps of:placing a billet into a cavity of the first die assembly;pressing the billet into the cavity of the first die assembly with ...

METHOD FOR CHANGING THE CALLIBRATION RANGE OF A DRAWING CHAIN, COMPRISING CHAIN LINKS, OF A CATERPILLAR-TRACK DRAWING MACHINE, AND CATERPILLAR-TRACK DRAWING MACHINE

In the case of a caterpillar track drawing machine having a drawing die and a caterpillar track disposed behind the drawing die, which track comprises two drawing chains having drawing tools disposed on chain links of the drawing chains, it should be possible to align the drawing tools of at least one of the two drawing chains jointly with the respective chain link, perpendicular to the drawing line, so that the caliber range can be changed, in simple and operationally reliable manner, between two drawing recesses having different caliber ranges. The latter is also possible if two different drawing recesses of the second one of the two drawing chains are intended for a first caliber range for which the first drawing recesses for at least one of the two drawing chains are intended, or if the drawing recesses of a first one of the two drawing chains deviate from the drawing recesses of a second one of the two drawing chains. 1141012131221111220211440411441414141202320402040. A caliber changing method for changing the caliber range of a drawing chain () of a caterpillar track drawing machine () that comprises chain links , comprising a drawing die () and a caterpillar track () disposed behind the drawing die () , viewed in a drawing direction () , which track can draw a workpiece () through the drawing die () along a drawing line () aligned parallel to the drawing direction () , shaping it , and comprises a drawing chain () that comprises chain links , wherein drawing tools () comprising at least first and second drawing recesses () are arranged or configured on the chain links of the drawing chain () , in each instance , wherein the first drawing recesses () are intended for a first caliber range and the second drawing recesses () are intended for a second caliber range , which deviates from the first caliber range , and wherein the first drawing recesses () and the second drawing recesses () are aligned , optionally with reference to the drawing line () or to a ...

SYSTEMS AND METHODS FOR DRAWING MATERIALS

Systems, devices, and methods are described for drawing materials. In certain embodiments, the material is metal tubing that is hollow along its length. The drawing system may include a first drawing machine that is fixed or stationary and a second drawing machine that moves relative to the first drawing machine. In certain embodiments, the position of the second drawing machine is determined with respect to a desired position, wherein the second drawing machine is downstream from the first drawing machine, and wherein the material is successively drawn by the first and second drawing machines. The drawing speed of the first drawing machine may be adjusted from a first speed to a second speed based on the determined position of the second drawing machine. A programmable logic controller may be provided to control, at least in part, operations of the drawing system. 1. A method for drawing a material comprising:determining a position of a second drawing machine with respect to a desired position, wherein the second drawing machine is downstream from a first drawing machine, and wherein the material is successively drawn by the first and second drawing machines; andadjusting a drawing speed of the first drawing machine from a first speed to a second speed based on the determined position of the second drawing machine.2. The method of claim 1 , wherein the determining comprises:detecting, using a sensor device, the position of the second drawing machine while the material passes from the first drawing machine to the second drawing machine.3. The method of claim 1 , wherein the position of the second drawing machine is determined by a position of a linear bearing with respect to a guide rail upon which the linear bearing translates.4. The method of claim 3 , wherein the desired position is a center of the guide rail.5. The method of claim 1 , wherein the adjusting causes the second drawing machine to move in a direction towards the desired position.6. The method of ...

PRECURSOR DETECTION METHOD AND PRECURSOR DETECTION DEVICE OF STICK-SLIP PHENOMENON, AND METHOD FOR COLD-DRAWING PIPE OR TUBE USING PRECURSOR DETECTION METHOD

A precursor detection device detects a precursor of a stick-slip phenomenon in a drawing machine The precursor detection device includes a load measurement section for measuring a load applied to a plug support bar in the drawing direction, a precursor detection section for detecting a precursor of a stick-slip phenomenon based on a load measurement value measured by the load measurement section and a control section After drawing is started, a load applied to the plug support bar in the drawing direction is measured by the load measurement section during a predetermined period from a measurement start point to a measurement end point, and based on the measured load measurement values, a precursor of a stick-slip phenomenon is detected by the precursor detection section 1. A precursor detection method for detecting a precursor of a stick-slip phenomenon during a cold drawing of a pipe or tube by a drawing machine including a die , a plug provided in the die , and a plug support bar for supporting the plug , the precursor detection method of the stick-slip phenomenon comprising:a load measurement step of measuring a load applied to the plug support bar in the drawing direction, during a predetermined period from a measurement start point to a measurement end point after drawing is started; anda precursor detection step of detecting a precursor of the stick-slip phenomenon based on load measurement values obtained in the load measurement step.2. The precursor detection method of the stick-slip phenomenon according to claim 1 , whereinin the precursor detection step, frequency analysis of load measurement values is performed over a predetermined frequency band, and it is judged that the precursor of the stick-slip phenomenon has occurred when a peak intensity of an obtained frequency spectrum by the frequency analysis exceeds a predetermined reference value.3. A method for cold drawing a pipe or tube claim 1 , wherein{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, ' ...

METHOD OF MANUFACTURING VARIABLE WALL THICKNESS STEEL PIPE AND VARIABLE WALL THICKNESS STEEL PIPE

There is provided a method of manufacturing a variable wall thickness steel pipe with a hollow tubular raw pipe. The method of manufacturing a variable wall thickness steel pipe includes locking the raw pipe in a die by thrusting a plug into the raw pipe from an one end side, so as to expand an outer shape on the one end side in a state, where the raw pipe is disposed inside the die and movement of the raw pipe in a longitudinal direction is restricted; and performing ironing in which an inner shape of the raw pipe is expanded while the outer shape is maintained so that a thin portion is formed by further thrusting the plug toward the other end side of the raw pipe while the locked state of the raw pipe is maintained, whereas the restriction on the raw pipe is relaxed. 1. A method of manufacturing a variable wall thickness steel pipe with a hollow tubular raw pipe , the method comprising:locking the raw pipe in a die by thrusting a plug into the raw pipe from an one end side, so as to expand an outer shape on the one end side, in a state where the raw pipe is disposed inside the die and movement of the raw pipe in a longitudinal direction is restricted; andperforming ironing in which an inner shape of the raw pipe is expanded while the outer shape is maintained so that a thin portion is formed by further thrusting the plug toward the other end side of the raw pipe while the locked state of the raw pipe is maintained, whereas the restriction on the raw pipe is relaxed.2. The method of manufacturing a variable wall thickness steel pipe according to claim 1 ,wherein in the performing ironing, an unprocessed portion remains on the other end side of the raw pipe by stopping thrusting the plug in the middle.3. The method of manufacturing a variable wall thickness steel pipe according to claim 1 ,wherein a thickness reduction rate of the thin portion in the performing ironing is within a range from 10% to 90%.4. The method of manufacturing a variable wall thickness steel ...

PRODUCTION METHOD AND PRODUCTION DEVICE FOR TUBE WITH SPIRALLY GROOVED INNER SURFACE

A method in accordance with the present application includes sending a raw tube from a drum to an unwinding side capstan while the raw tube is rotated around a central axis perpendicular to a winding shaft of the drum by rotating the drum and the unwinding side capstan about the central axis concurrently with unwinding of the raw tube from the drum holding the raw tube, on an inner surface of which multiple straight grooves along a longitudinal direction of the raw tube are formed with an interval in a circumferential direction, in a coil shape, to wind the raw tube around the unwinding side capstan, and drawing in which the unwound raw tube is drawn while the diameter of the raw tube is reduced, and then the raw tube is wound around the drawing side capstan to twist the raw tube and obtain an inner spiral grooved tube. 1. An apparatus for producing an inner spiral grooved tube comprising:a drum holding a raw tube, on an inner surface of which a plurality of straight grooves along a longitudinal direction of the raw tube is formed with an interval in a circumferential direction;an unwinding side capstan configured to unwind the raw tube unwound from the drum while the unwound raw tube is wound around the unwinding side capstan;a rotation part configured to rotate the drum and the unwinding side capstan centering on a central axis perpendicular to a winding shaft of the drum; anda drawing die configured to reduce a diameter of the raw tube and introduce twist on the raw tube by passing the raw tube unwound from the unwinding side capstan thorough the drawing die.2. The apparatus for producing an inner spiral grooved tube according to claim 1 , wherein a foremost location claim 1 , on which the raw tube is wound around the unwinding side capstan; and a foremost location claim 1 , on which the raw tube is sent from the unwinding side capstan to a side of the drawing die claim 1 , are displaced in a direction parallel to a rotation axis of the unwinding side capstan for ...

Tubular element for gas pressure vessel, gas pressure vessel and method of manufacturing a tubular element

This invention concerns a tubular element for a gas pressure vessel of an airbag module, in particular of a vehicle, wherein the tubular element (1) consists of high-strength steel, has a first and a second end (17, 18) and from the first end (17) to the second end (18) the tubular element (1) has an undeformed section (11), a transition section (12) and a tapering section (13) and on the tapering section (13) at least one radially outwardly extending collar (14) is formed, characterized in that the collar (14) is separated from the transition section (12) by a first length section (130) having an outer diameter (A1) smaller than the outer diameter (A2) of the collar (14) and the wall thickness of the collar (14) is greater than the wall thickness of the first length section (130). Furthermore, the invention concerns a gas pressure vessel and a process for manufacturing a tubular element according to the invention (1).

PRODUCTION METHOD AND PRODUCTION DEVICE FOR TUBE WITH SPIRALLY GROOVED INNER SURFACE

A method in accordance with the present application includes sending a raw tube from a drum to an unwinding side capstan while the raw tube is rotated around a central axis perpendicular to a winding shaft of the drum by rotating the drum and the unwinding side capstan about the central axis concurrently with unwinding of the raw tube from the drum holding the raw tube, on an inner surface of which multiple straight grooves along a longitudinal direction of the raw tube are formed with an interval in a circumferential direction, in a coil shape, to wind the raw tube around the unwinding side capstan, and drawing in which the unwound raw tube is drawn while the diameter of the raw tube is reduced, and then the raw tube is wound around the drawing side capstan to twist the raw tube and obtain an inner spiral grooved tube. 1. A method for producing an inner spiral grooved tube comprising the steps of:twisting and drawing an unwound raw tube, which has grooves or fins on an inner surface, by introducing twist to the unwound raw tube while a diameter of the unwound raw tube is reduced by being passed through a drawing die, to obtain an inner spiral grooved tube, the unwound raw tube being wound up on an unwinding side capstan; andwinding up the inner spiral grooved tube, whereinthe unwinding side capstan rotates in such a way that: a post-unwound-pre-diameter-reduction raw tube from having been unwound from the unwinding side capstan to reaching to the drawing die rotates about a central axis of the post-unwound-pre-diameter-reduction raw tube; and the raw tube before being wound up on the unwinding side capstan rotates in synchronization with the raw tube being wound up on the unwinding side capstan.2. The method for producing an inner spiral grooved tube according to claim 1 , wherein a diameter reduction ratio of the drawing die is 5% to 40%.3. The method for producing an inner spiral grooved tube according to claim 1 , wherein a foremost location claim 1 , on which ...

Methods for Creating a Zinc-Metal Oxide Layer in Metal Components for Corrosion Resistance

The present invention provides a method for manufacturing a finished metal object or product having a corrosion resistant layer integral to or within a top portion of at least one of its surfaces that would be exposed to a corrosive environment. In one embodiment, the method for manufacturing is directed to a finished metal tubing product having a corrosion resistant layer within its inside surface that is exposed to a fluid and wherein the corrosion resistant layer is a zinc-metal oxide layer, such as a zinc-chromium oxide layer, or a zinc-mixed metal oxide layer. In addition to methods of manufacturing, the present invention provides finished metal objects or products having a corrosion resistant layer integral to or within a top portion of at least one surfaces that would be exposed to a corrosive environment. 1. A method for creating a metal object having a corrosion resistant layer , comprising:incorporating zinc into at least a portion of at least one metal surface of a metal object that will be exposed during use of the metal object;forming a corrosion resistant layer within the portion of the at least one metal surface.2. The method of claim 1 , wherein the corrosion resistant layer comprises a zinc-metal oxide layer.3. The method of claim 1 , wherein the metal surface comprises chromium and wherein the zinc-metal oxide layer comprises a zinc-chromium oxide layer.4. The method of claim 1 , wherein the metal surface comprises an alloy comprising chromium.5. The method of claim 1 , wherein the metal surface comprises nickel-iron-chromium bearing steel.6. The method of claim 1 , further comprising:incorporating a second metal into the portion of the at least one metal surface.7The method of claim 6 , wherein the second metal comprises chromium.8. A method for creating a metal object having a corrosion resistant layer claim 6 , comprising:incorporating zinc into at least a portion of at least one metal surface of a metal object that will be exposed during use of ...

STEAM GENERATOR PIPE HAVING A TURBULENCE INSTALLATION BODY

A steam generator pipe for producing a steam generator pipe with a spiral-shaped installation body, wherein an elevation extends on the inner side of the steam generation pipe in the axial direction of the steam generator pipe. A method for producing a steam generator pipe having an installation body. 14.-. (canceled)5. A method for producing a steam generator pipe having an installation body , the method comprising:producing a steam generator pipe having an elevation which extends in the longitudinal direction of the steam generator pipe on a pipe inner side, andwelding the installation body on the elevation in the steam generator pipe.6. The method as claimed in claim 5 ,wherein the steam generator pipe having an elevation is produced by cold drawing.7. The method as claimed in claim 5 ,wherein the elevation is embossed using a stamp.8. The method according to claim 5 ,wherein the installation body is spiral-shaped and is welded on the elevation at multiple contact points. This application is the US National Stage of International Application No. PCT/EP2017/059227 filed Apr. 19, 2017, and claims the benefit thereof. The International Application claims the benefit of German Application No. DE 102016212416.1 filed Jul. 7, 2016. All of the applications are incorporated by reference herein in their entirety.The invention relates to a method for producing a steam generator pipe having an installation body.Smooth pipes or internally ribbed pipes are used for evaporator heating surfaces in steam generators. The use of internally ribbed pipes may be necessary for various reasons: low full load mass flow density of the evaporator (for example BENSON low mass flux design), high heat flow density and risk of film boiling (for example drum-type boiler), avoidance of flow stratification in normal load operation (for example minimum load in evaporators with spiral pipes).The internal ribbing of the pipes is produced by a cold drawing process according to the prior art. ...

Floating Draw Plug and Method of Drawing Tube

A floating draw plug for shaping tube comprises a necking body and a rib forming member. The necking body has an axis and a trailing end portion. The trailing portion has a cross-section that is symmetric about the axis and that converges toward the axis as it extends downstream. The rib forming member comprises helical protrusions and helical grooves. The helical protrusions and the helical grooves are aligned with the axis. The rib forming member is connected to the necking body in a manner such that at least a portion of the helical protrusions and at least a portion of the helical grooves extend downstream of the trailing portion of the necking body and such that the rib forming member is free to rotate about the axis relative to the necking body. 1. A floating draw plug for shaping tube , the draw plug comprising:a necking body, the necking body having an axis and a trailing end portion, the trailing end portion having a cross-section that is symmetric about the axis and that converges toward the axis as it extends downstream; and,a rib forming member, the rib forming member comprising helical protrusions and helical grooves, the helical protrusions and the helical grooves being aligned with the axis, the rib forming member being connected to the necking body in a manner such that at least a portion of the helical protrusions and at least a portion of the helical grooves extend downstream of the trailing portion of the necking body and such that the rib forming member is free to rotate about the axis relative to the necking body.2. A floating draw plug in accordance with wherein the helical protrusions have a constant radius from the axis as they extend downstream.3. A floating draw plug in accordance with wherein the necking body has an axial downstream recess and a portion of rib forming member extends therein.4. A floating draw plug in accordance with wherein the rib forming member is attached to the necking body via a threaded fastener.5. A floating draw ...

METHOD FOR PRODUCING A HIGH-PRESSURE PIPE

Method for producing a high-pressure tube with inner tube and outer tube made of metal are drawn together through a first drawing die. The outer diameter of the inner tube is smaller than the inner diameter and drawing forms a very stable frictional connection between the inner tube and the outer tube. The manufactured tube has a large wall thickness and is very robust and pressure-resistant while having a very high quality outer shell surface and in particular a very high quality inner shell surface by virtue of the cold forming process. These two properties allow a sufficiently high protection against bursting when pressures in excess of 12,000 bar are applied to the tube. The produced tube has improved dynamic pressure resistance against high pressures by combining a large wall thickness of the tube to be manufactured with a high quality inner shell surface of the tube to be manufactured. 1. A method for manufacturing a tube comprising the steps of:providing an inner tube made of metal having a first inner diameter and a first outer diameter;providing an outer tube made of metal with a second inner diameter and a second outer diameter, wherein the first outer diameter is smaller than the second inner diameter, and wherein inserting the inner tube into the outer tube such that the inner tube extends within the outer tube; anddrawing of the inner tube and the outer tube together through a first drawing die, wherein the second inner diameter is reduced such that a frictional connection of the outer tube and the inner tube is established.2. The method according to claim 1 , wherein the tool diameter of the forming inner surface of the first drawing die claim 1 , the second outer diameter of the outer tube claim 1 , the second inner diameter of the outer tube claim 1 , the first outer diameter of the inner tube and the first inner diameter of the inner tube are selected such that the first inner diameter of the inner tube during the drawing of the outer tube and inner ...

METHOD AND FORMER FOR NECKING AND THICKENING TUBE END

A method and a former for necking and thickening a tube end. The former includes a hydraulic cylinder, a pusher, a concave die, a filler block, a plurality of heating rods and a heating device. The hydraulic cylinder is connected to a disc provided with a guide sleeve. The pusher is provided on the hydraulic cylinder and passes through the guide sleeve. The concave die is provided at a side of the pusher and includes a mold cavity and a plurality of heating holes. The filler block is provided in the mold cavity. The heating rods are provided in the heating holes connected to the heating device. The filler block includes a tapered portion provided at one end of the filler block and a diameter-reduced portion. The tapered portion is threadedly connected to the diameter-reduced portion. An ejector pin is provided at one end of the diameter-reduced portion. 1. A former for necking and thickening a tube end , comprising:a hydraulic cylinder,a pusher,a concave die,a filler block,a plurality of heating rods, anda heating device,wherein the hydraulic cylinder is connected to a disc; a guide sleeve is provided on the disc; the pusher is provided on the hydraulic cylinder and passes through the guide sleeve; the concave die is provided at a side of the pusher; the concave die comprises a mold cavity and a plurality of heating holes; the filler block is provided in the mold cavity; the plurality of heating rods are provided in the plurality of heating holes; and the plurality of heating rods are connected to the heating device;wherein the filler block comprises a tapered portion and a diameter-reduced portion; the tapered portion is provided at a first end of the filler block; the tapered portion is threadedly connected to the diameter-reduced portion; and an ejector pin is further provided at a first end of the diameter-reduced portion.2. The former of claim 1 , wherein a cooling device is further provided between the hydraulic cylinder and the concave die; the cooling device ...

METHOD OF PRODUCING INNER SPIRAL GROOVED TUBE AND APPARATUS FOR PRODUCING INNER SPIRAL GROOVED TUBE

A method of producing an inner spiral grooved tube using a first drawing die using first and second drawing dice and a revolving flyer is provided. The method includes a first twisting-drawing step to form an intermediate twisted tube by reducing a diameter of a linear grooved tube, on an inner surface of which a plurality of straight grooves is formed along with a longitudinal direction, in conjunction with imparting twist to the linear grooved tube by passing the linear grooved tube through the first drawing die and then by revolving the liner grooved tube by wrapping the linear grooved tube around the revolving flyer; and a second twisting-drawing step to form an inner spiral grooved tube by reducing a diameter of the intermediate twisted tube by passing the intermediate twisted tube, which revolves with the revolving flyer, through the second drawing die in conjunction with imparting twist to the intermediate twisted tube. 1: A method of producing an inner spiral grooved tube using a first drawing die , a drawing direction of which is a first direction , a second drawing die , a drawing direction of which is a second direction opposite to the first direction , and a revolving flyer , which is configured to invert a tube route of a tubular material from the first direction to the second direction between the first drawing die and the second drawing die and to revolve around any one of the first drawing die and the second drawing die , the method comprising:a first twisting-drawing step to form an intermediate twisted tube by reducing a diameter of a linear grooved tube, on an inner surface of which a plurality of straight grooves is formed along with a longitudinal direction, in conjunction with imparting twist to the linear grooved tube by passing the linear grooved tube through the first drawing die and then by revolving the liner grooved tube by wrapping the linear grooved tube around the revolving flyer; anda second twisting-drawing step to form an inner ...

METHOD OF PRODUCING INNER SPIRAL GROOVED TUBE AND APPARATUS FOR PRODUCING INNER SPIRAL GROOVED TUBE

A method produces an inner spiral grooved tube using a first drawing die, a second drawing die, and a revolving flyer. The method includes two twisting-drawing steps. The first twisting-drawing step forms an intermediate twisted tube by reducing the diameter of a linear grooved tube, which has plural straight grooves formed along the longitudinal direction on its inner surface, by passing the linear grooved tube through the first drawing die and then by revolving the liner grooved tube wrapped around the revolving flyer with the revolving flyer, in conjunction with imparting twist to the linear grooved tube. The second twisting-drawing step forms the inner spiral grooved tube by reducing the diameter of the intermediate twisted tube by passing the intermediate twisted tube, which revolves with the revolving flyer, through the second drawing die in conjunction with imparting twist to the intermediate twisted tube. 17-. (canceled)8. An apparatus for producing an inner spiral grooved tube , the apparatus comprising:first and second bobbins, one of which is an unwinding bobbin and the other of which is a winding bobbin, a tubular material being conveyed from the unwinding bobbin to the winding bobbin and the tubular material unwound from the unwinding bobbin being a liner grooved tube;a floating frame that supports a shaft of the first bobbin;a rotary shaft that supports the floating frame though bearings and rotates in a direction perpendicular to an axis of a bobbin in the floating frame;a revolving flyer configured to invert a tube route of the tubular material between the first bobbin and the second bobbin, to convey the linear grooved tube, and to revolve the linear grooved tube around the floating frame as being supported by the rotary shaft; andfirst and second drawing dice positioned on a front stage and a rear stage of the revolving flyer, respectively, in the tube route of the tubular material,whereina plurality of straight grooves is formed on an inner ...

Method and apparatus for making seamless pipe

The invention relates to a device and a method for producing a pipe ( 1 ) from a hollow block ( 2 ) which has an opening ( 3 ). The device has a rolling mill ( 30 ) for rolling the hollow block ( 2 ) via a rolling rod ( 21 ) introduced into the opening ( 3 ) of the hollow block ( 2 ), whereby the pipe ( 1 ) is produced. A retaining device ( 70 ) for retaining the pipe ( 1 ) is provided behind the rolling mill ( 30 ), and the device is further designed such that the rolling rod ( 21 ) can be drawn out of the pipe ( 1 ) after the rolling process while the pipe ( 1 ) is retained by the retaining device ( 70 ).

Resin-coated steel can and method for producing the same

A resin-coated steel can and method for producing the same. The resin-coated steel can is produced by drawing or draw-redrawing a resin-coated steel sheet at least having a surface serving as a can inner surface coated with a biaxially-stretched polyester film and a surface serving as a can outer surface that is coated and/or printed. The biaxially-stretched polyester film on the can inner surface side wall has a crystallinity in a range of 42 to 52%, and a shrinkage (shrinkage in the can height direction upon raising the temperature from 23° C. to 130° C. at a rate of 5° C./min.) of the biaxially-stretched polyester film on the can inner surface side wall is less than 10% of the can height.

CONTINUOUS METHOD FOR PRODUCING CAPILLARIES MADE OF NONFERROUS ALLOYS

A method for producing capillaries from nonferrous alloys, in particular of Al, which includes the continuous cold rotary extrusion of a blank having a solid cross-section, obtained by casting, in order to produce a tube having a hollow cross-section. The deformation of the blank to be extruded is achieved only by using friction force. The method further includes at least one step of cold drawing of the extruded tube in order to reduce its diameter to the diameters corresponding to a capillary. 19-. (canceled)10. A method for producing capillaries from nonferrous alloys , the method including the following steps: a continuous cold rotary extrusion of an initial blank having a solid cross-section , produced by casting , in order to obtain a tube having a hollow cross-section , wherein a deformation of the blank to be extruded is achieved only by friction force , a cooling of the extruded tube to ambient temperature , and at least one step of cold drawing of the extruded tube in order to reduce a diameter thereof to diameters corresponding to a capillary.11. The method according to claim 11 , further comprising a step of winding the extruded tube in the form of a coil before feeding to the step of cold drawing.12. The method according to claim 11 , wherein said nonferrous alloy is an aluminum alloy selected from the UNI EN 573-3 standard series from 1000 to 6000.13. The method according to claim 11 , wherein the alloy is an aluminum alloy of the UNI 3103 series.14. The method according to claim 11 , comprising a plurality of steps of cold drawing performed in succession until an inside diameter of the capillary in the range from 0.2 mm to 4.5 mm is obtained.15. The method according to claim 11 , wherein the continuous cold rotary extrusion is achieved by using a wheel with an endless perimetric external groove in which said blank is accommodated and is fed to an extrusion chamber by a contact with protrusions in the extrusion chamber configured to generate sufficient ...

Magnesium alloy butted tube drawing mechanism

A magnesium alloy thick and thin tube butting mechanism is disclosed in the utility model and includes a tube butting mold, a tube butting mandrel, and a hydraulic actuator. The tube butting mold has a mold heating component used for magnesium alloy tube to enter a tube wire drawing mold. A material is heated. The magnesium alloy thick and thin tube butting mechanism may further include a tube heating component configured to pre-heat the magnesium alloy tube before the magnesium alloy tube enters a tube mold.

A Method For Forming A Hollow Of A Ferritic FeCrAl Alloy Into A Tube

The present invention relates to a method for forming a hollow of a ferritic FeCrAI alloy into a tube . While tubes made of powder metallurgical, dispersion hardened, ferritic FeCrAI alloys are commercially available, hollows made of FeCrAI alloys so far can hardly be formed into tubes of small dimensions. The major reason for the problems in forming hollows of a ferritic FeCrAI alloy into a finished product is that FeCrAI alloys are brittle. It is therefore an aspect of the present invention to provide a tube made of a ferritic FeCrAI alloy having arbitrary small dimensions. Furthermore, it is an aspect of the present invention to provide a machine and a method for forming a tubular hollow into a finished tube of a ferritic FeCrAI alloy. At least one of the above aspects is addressed by a method for forming a hollow into a tube comprising the steps providing the hollow of a ferritic FeCrAI alloy, heating the hollow to a temperature in a range from 90° C. to 150° C., and forming the heated hollow by pilger milling or drawing into the tube. 1. A tube made of a ferritic FeCrAl alloy obtained by a method comprising the steps of:providing a hollow of a ferritic FeCrAl alloy;heating the hollow to a temperature in a range from 90° C. to 150° C.; andforming the heated hollow by pilger milling or drawing into the tube.2. The tube according to claim 1 , wherein the tube has an outer diameter of 25 mm or less.3. A machine for forming a hollow of a ferritic FeCrAl alloy into a tube comprising:a heating equipment for the hollow; anda pilger mill or a drawing equipment,wherein the heating equipment for the hollow is arranged in front of an infeed of the pilger mill or the drawing equipment, andwherein the heating equipment is arranged to heat the hollow during operation of the machine to a temperature in a range from 90° C. to 150° C.4. The machine according to claim 3 , wherein the heating equipment is an inductive heater.5. The machine according to claim 4 , wherein the ...

FORMED MATERIAL MANUFACTURING METHOD AND FORMED MATERIAL

A formed material is manufactured by performing forming including at least one drawing-out process and at least one drawing process performed after the drawing-out process. A punch used in the drawing-out process is formed to be wider on a rear end side than on a tip end side. By pushing a raw material metal plate into a pushing hole together with the punch , ironing is performed on a region of the raw material metal plate corresponding to a flange portion. 17-. (canceled)8. A formed material manufacturing method for manufacturing a formed material having a tubular trunk portion and a flange portion formed on an end portion of the trunk portion , by performing at least two forming processes on a raw material metal plate ,wherein the at least two forming processes include at least one drawing-out process and at least one drawing process performed after the drawing-out process,the drawing-out process is performed using a mold that includes a punch and a die having a pushing hole,a width of a rear end side of the punch is set to be wider than a width of a tip end side thereof so that a clearance between the die and the punch when the punch is pushed into the pushing hole in the die is narrower on the rear end side than on the tip end side, andironing is performed on a region of the raw material metal plate corresponding to the flange portion by pushing the raw material metal plate into the pushing hole together with the punch during the drawing-out process,and wherein a width variation portion constituted by an inclined surface on which a width of the punch varies continuously is provided between the tip end side and the rear end side of the punch, and the width variation portion is disposed in contact with a region corresponding to a shoulder portion formed between a peripheral wall of the trunk portion and the flange portion.9. The formed material manufacturing method according to claim 8 , wherein an ironing rate of the ironing is 50% or lower.10. The formed ...

PRODUCTION METHOD AND PRODUCTION DEVICE FOR TUBE WITH SPIRALLY GROOVED INNER SURFACE

A method in accordance with the present application includes sending a raw tube from a drum to an unwinding side capstan while the raw tube is rotated around a central axis perpendicular to a winding shaft of the drum by rotating the drum and the unwinding side capstan about the central axis concurrently with unwinding of the raw tube from the drum holding the raw tube, on an inner surface of which multiple straight grooves along a longitudinal direction of the raw tube are formed with an interval in a circumferential direction, in a coil shape, to wind the raw tube around the unwinding side capstan, and drawing in which the unwound raw tube is drawn while the diameter of the raw tube is reduced, and then the raw tube is wound around the drawing side capstan to twist the raw tube and obtain an inner spiral grooved tube. 1: A method for producing an inner spiral grooved tube comprising the steps of:unwinding a raw tube from a drum to an unwinding side capstan while the raw tube is rotated around a central axis perpendicular to a winding shaft of the drum by rotating the drum and the unwinding side capstan about the central axis concurrently with unwinding of the raw tube from the drum holding the raw tube, on an inner surface of which a plurality of straight grooves along a longitudinal direction of the raw tube is formed with an interval in a circumferential direction, in a coil shape, to wind the raw tube around the unwinding side capstan; andtwisting and drawing the unwound raw tube by introducing twist to the unwound raw tube while a diameter of the unwound raw tube is reduced by being passed through a drawing die, to obtain an inner spiral grooved tube.2: The method for producing an inner spiral grooved tube according to claim 1 , wherein a diameter reduction ratio of the drawing die is 5% to 40%.3: The method for producing an inner spiral grooved tube according to claim 1 , wherein a foremost location claim 1 , on which the raw tube is wound around the ...

DRAWING MACHINE FOR DRAWING TUBES

A drawing machine () for drawing a tube (), defining a longitudinal axis (Y), comprising a first die () for carrying out the drawing of the tube by means of the use of a mandrel (); a device for varying the inclination () of the tube inlet into said first die (); a second die () for carrying out a skin pass operation on the tube, arranged downstream of said first die (); an in-line system for detecting the eccentricity of the tube; a data processing system () for processing signals originating from said detection system and sending input data to said device for varying the inclination () of the tube to vary the inclination of the tube so as to correct the eccentricity of the tube in-line; wherein said in-line system for detecting the eccentricity of the tube comprises a first detection head comprising at least three first transducers () arranged downstream of said first die (). 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. An in-line method for correcting an eccentricity of a tube during a drawing thereof , by means of a drawing machine , the method comprising the following stages:drawing the tube by means of the first die;carrying out a skin pass operation on the tube by means of the second die;carrying out a first in-line detection of the eccentricity of the tube by means of the first detection head;processing the signals originating from said first detection head by means of the data processing system and sending input data to the inclination variation device so as to vary the inclination of the tube with respect to the longitudinal axis and to correct the eccentricity of the tube in-line.11. A method according to claim 10 , wherein said first in-line detection of the eccentricity of tube is provided at said second die and/or at an area arranged downstream of said first die and upstream of said second die.12. A method according to claim 10 , wherein there is provided a second in-line ...

TWIST-AXLE WITH LONGITUDINALLY-VARYING WALL THICKNESS

The invention relates to a twist-axle that includes a cross-beam member and two trailing arms, each trailing arm rigidly secured to the cross-beam member in one of two connection regions of the cross-beam member or formed integrally with and extending from one of the two connection regions. The cross-beam member is formed from a tubular blank and has a torsionally elastic central portion and two torsionally stiff connection regions. The cross-beam member has a wall thickness that varies longitudinally along the length of the cross-beam member from the torsionally elastic central portion to each of the torsionally stiff connection regions. 1. A unitary , tubular cross-beam member for use in a twist-axle of a vehicle , the twist-axle being provided with two trailing arms , the cross-beam member extending between and joining the trailing arms at two connection regions of the cross-beam member to form an integral axle , the cross-beam member comprising a central section formed between the two connection regions , the central section being torsionally elastic and each of the connection regions being torsionally stiff adjacent at least a portion of the connection region joining each of the trailing arms , the cross-beam member having a wall thickness that is generally uniform circumferentially and varying longitudinally from the torsionally elastic central section to each of the torsionally stiff connection regions.2. The cross-beam member of claim 1 , wherein the wall thickness of the cross-beam member varies smoothly from the torsionally elastic section to each of the torsionally stiff connection regions.3. The cross-beam member of claim 1 , wherein the wall thickness in at least a portion of the connection regions is greater than that in the central section.4. (canceled)5. The cross-beam member of claim 1 , wherein the central section has a generally open transverse profile to provide the torsional elasticity.6. The cross-beam member of claim 1 , wherein the cross-beam ...

Drawing Carriage for a Drawing Machine, and Drawing Machine

A drawing carriage for a drawing machine, comprising two clamping jaws () and a clamping jaw moving device for an opening and closing movement of the clamping jaws (), is characterized in that the clamping jaw moving device comprises a linear motor (). In the case of a drawing machine, comprising a drive unit for driving at least two drawing carriages (), the drawing carriages () have a linear motor () for the clamping jaw moving device. 1. A drawing carriage for a drawing machine , comprising two clamping jaws as well as a clamping jaw moving device for an opening and closing movement of the clamping jaws , wherein the clamping jaw moving device comprises exactly one linear motor , the linear motor having a stator part affixed on the drawing carriage and a mover part that is arranged on the drawing carriage and linearly movable relative to the stator part and the mover part directly or indirectly engaging at least one clamping jaw or a clamping jaw holder.2. The drawing carriage according to claim 1 , wherein the clamping jaw moving device is configured so as to displace the clamping jaws with a component in the longitudinal direction of the drawing carriage.3. The drawing carriage according to further comprising a feed-in device claim 1 , in particular feed-in pincers claim 1 , for feeding in material to be drawn towards the clamping jaws claim 1 , the feed-in device having a feed-in linear motor for the feed-in motion.4. A drawing machine comprising a drive unit for driving at least two drawing carriages claim 1 , wherein at least one of the drawing carriages comprises two clamping jaws and a clamping jaw moving device for an opening and closing movement of the clamping jaws claim 1 , wherein the clamping jaw moving device comprises exactly one linear motor claim 1 , the linear motor having a stator part affixed on the drawing carriage and a mover part that is arranged on the drawing carriage and linearly movable relative to the stator part and the mover part ...

MOTOR AND CAMSHAFT THEREOF, AND MANUFACTURING METHOD FOR CAMSHAFT

Engine and its camshaft, camshaft manufacturing method, the camshaft comprises a central shaft having an axial hole, the central shaft has a fitting section, the outer circumference of a cross section at any axial position of the fitting section is a polygon; a first cam and a second cam, the first cam and second cam are respectively installed on the fitting section of the central shaft and are spaced axially. Such a structure has the advantages of higher torque transmission, simpler structure, simplified manufacturing process, shorter manufacturing time consumption and reduced cost. 175-. (canceled)76. A camshaft , characterized in that , it comprises:a central shaft with a fitting section, the outer circumferential surface of the fitting section has the same cross sectional profile at any axial position, the cross sectional profile includes: a linear zone and a circular zone, the circular zone belongs to the same circle and includes multiple arcs, the linear zone belongs to the same polygon and includes multiple straight lines, the straight line and the arc are spaced in an interweaved manner circumferentially, and interconnected into the cross sectional profile;a cam installed on the fitting section of the central shaft.77. The camshaft of claim 76 , characterized in that the circle and the polygon are concentric.78. The camshaft of claim 76 , characterized in that includes: a bearing claim 76 , mounted on the fitting section of the central shaft claim 76 , the bearing has an inner bore for fitting with the central shaft claim 76 , the inner bore is round and the circle has a diameter identical to that of the circle to which the circular zone belongs.79. The camshaft of claim 76 , characterized in that the camshaft also comprising a bearing claim 76 , the bearing has an inner bore claim 76 , the inner bore includes a cambered surface for fitting with the circular zone of the central shaft.80. The camshaft of any of claims 76 , characterized in that a profile and ...

Multi-layer pipe manufacturing apparatus and method of manufacturing multi-layer pipes using the same

An apparatus for manufacturing a multi-layer pipe is provided. The apparatus includes a ram extruding a matrix pipe, which is formed by inserting one or more insert pipes having different diameters into a receiving pipe, with a constant compression force, a heat-treatment unit heat-treating the matrix pipe extruded from the ram, and a drawing unit drawing, with a constant drawing force, the matrix pipe passing through the heat-treatment unit into a multi-layer pipe having a predefined diameter.

AMMUNITION PRODUCTION

The present disclosure relates to a construction method for improved tracer ammunition production. There is provided a method of forming a component for a round, said method comprising the step of causing said component to be drawn through at least one floating die. 1. A tracer projectile comprising an elongate outer sheath , the elongate outer sheath encapsulating an inner core and extending rearwardly of the inner core so as to provide a cavity for receiving at least one consolidated energetic material , wherein said outer sheath has a maximum wall thickness variation of 0.03 mm.2. The tracer projectile according to claim 1 , further comprising a case.3. The tracer projectile according to claim 2 , wherein said tracer projectile is attached to said case so as to form a round.4. The tracer projectile according to claim 3 , wherein said case is brass.5. The tracer projectile according to claim 4 , wherein said outer sheath is selected from copper claim 4 , steel claim 4 , a copper steel laminate claim 4 , or alloys thereof.6. The tracer projectile according to claim 1 , wherein the outer sheath is made from a metal laminate.7. The tracer projectile according to claim 1 , wherein the inner core includes a hardened tip.8. The tracer projectile according to claim 1 , further comprising the at least one consolidated energetic material claim 1 , wherein the at least one consolidated energetic material is a quantity of pyrotechnic material claim 1 , which is ignitable by a thermal output of a gun propellant.9. The tracer projectile according to claim 1 , wherein the outer sheath has a mean wall thickness variation of 0.02 mm or less.10. A tracer projectile comprising an elongate outer sheath claim 1 , the elongate outer sheath encapsulating an inner core and extending rearwardly of the inner core so as to provide a cavity for receiving at least one consolidated energetic material claim 1 , wherein said outer sheath has a mean wall thickness variation of 0.02 mm or less.11 ...

Method of preparing cylindrical metal member, metallic ingot for impact pressing, and method of preparing electrophotographic photoreceptor

A method of preparing a cylindrical metal member includes preparing a metallic ingot having at least one surface having a mean width with respect to ruggedness Sm in a range of from 100 μm to 220 μm; imparting a lubricant to the at least one surface of the metallic ingot; and subjecting the metallic ingot to impact pressing while the surface coated with the lubricant with respect to the metallic ingot is set as a bottom surface, to thereby mold a cylindrical metal member.

ELECTRICALLY CONDUCTIVE WIRE AND METHOD OF ITS PRODUCTION

An electrically conductive wire (D) is provided which is constructed on the basis of copper and which includes a core () as well as a layer () metallically connected to the layer (), while the layer () has a proportion of the wire cross section which is between 20% and 50% of the cross section of the wire. The core () on the one nano and the layer () surrounding the core () consist of different materials on the basis of copper. 1. Electrically conductive wire which is constructed on the basis of copper comprising:a core; anda layer circumferentially surrounding the core and metallically connected to the same,wherein the core has a proportion of the cross section. of the wire which is between 20% and 50%, while the layer has a corresponding proportion of the wire cross section which is between 80% and 50%,wherein the core on the one hand, and the layer surrounding the core on the other hand, consist of different materials on the basis of copper.2. Wire according to claim 1 , wherein the different materials are non-alloyed copper and/or a copper alloy.3. Wire according to claim 1 , wherein either the core and the layer surrounding the core is made of non-alloyed copper claim 1 , and the layer surrounding the same consists of a copper alloy or vice-versa.4. Wire according to claim 1 , wherein either the core is made of a first copper alloy and the layer surrounding the core made of a second alloying material claim 1 , which is different from the first copper alloy.5. Wire according to claim 2 , wherein silver is utilized as the alloying material for the copper alloy.6. Wire according to claim 2 , wherein tin is used as the alloying material for the copper alloy.7. Wire according to claim 2 , wherein magnesium is utilized as the alloying material for the copper alloy.8. Method of manufacturing a wire according to claim 1 , wherein the layer surrounding the core in the finished wire is applied to the prefabricated core in a molten state and is pulled through the bath.9. ...

PRODUCTION METHOD FOR A RING ELECTRODE

One aspect relates to a production method for a ring electrode, to a ring electrode, and to an electrode system. One method for the ring electrode includes providing an outer element, including an outer tube, providing a first inner element, including a first inner tube having a first core of a sacrificial material, providing a second inner element, including a second core of a sacrificial material, forming a composite tube by arranging the first inner element and the second inner element inside the outer element, the first inner element and the second inner element being arranged off-center with respect to one another, drawing the composite tube in a longitudinal direction of the composite tube, separating a composite tube disk from the composite tube, removing the sacrificial material of the first core, and removing the sacrificial material of the second core in order to obtain a contacting opening in the ring electrode. 1. A production method for a ring electrode , comprising:providing an outer element, which comprises an outer tube;providing a first inner element, which comprises a first inner tube having a first core of a sacrificial material;providing a second inner element, which comprises a second core of a sacrificial material;forming a composite tube by arranging the first inner element and the second inner element inside the outer element, the first inner element and the second inner element being arranged off-center with respect to one another;drawing the composite tube in a longitudinal direction of the composite tube;separating a composite tube disk from the composite tube;removing the sacrificial material of the first core; andremoving the sacrificial material of the second core in order to obtain a contacting opening in the ring electrode.2. The method of claim 1 , wherein the removal of the sacrificial material of the first core and/or of the sacrificial material of the second core is corrosion or etching.3. The method of claim 1 , wherein the ...

ELECTRIC RESISTANCE WELDED STEEL PIPE HAVING IDENTIFIABLE SEAM PORTION AND METHOD FOR MANUFACTURING THE SAME

A method for manufacturing an electric resistance welded steel pipe having an identifiable seam portion. The method includes electric resistance welding a steel pipe, cutting an inner surface bead and an outer surface bead of the steel pipe in such a manner so as to cut: (i) a whole the outer surface bead and a part of the inner surface bead to leave an uncut portion in the inner surface bead, or (ii) a whole of the inner surface bead and a part of the outer surface bead to leave an uncut portion in the outer surface bead, coating the steel pipe with zinc phosphate, and cold drawing the steel pipe using a plug and a die to make the seam portion of the steel pipe identifiable. 1. A method for manufacturing an electric resistance welded steel pipe having an identifiable seam portion , the method comprising:rounding a steel strip in a width direction by roll forming while continuously feeding the steel strip;joining both ends of the rounded steel strip in the width direction by electric resistance welding to make a steel pipe having a seam portion formed by the joining;cutting an inner surface bead and an outer surface bead of the steel pipe in such a manner so as to cut: (i) a whole of the outer surface bead and a part of the inner surface bead to leave an uncut portion in the inner surface bead, or (ii) a whole of the inner surface bead and a part of the outer surface bead to leave an uncut portion in the outer surface bead, and the cutting of the inner surface bead and the outer surface bead is performed so that a protrusion of the uncut portion has a protrusion height h of greater than or equal to 0.07 times and less than or equal to 1.7 times a wall thickness t of a non-bead portion of the steel pipe;applying coating of zinc phosphate to at least an outer surface of the steel pipe to form a coating portion; andsubjecting the steel pipe to cold drawing using a plug and a die.2. The method of claim 1 , wherein the cutting of the inner surface bead and the outer ...

Process for producing a multilayer pipe having a metallurgical bond by drawing, and multilayer pipe produced by this process

The invention relates to a process for producing a multilayer pipe ( 1 ) from a tubular element having a metallurgical bond comprising at least one outer pipe ( 10 ) of metallic material and one inner pipe ( 20 ) of metallic material arranged within the outer pipe, the inner surface of the outer pipe ( 10 ) being mechanically bonded to the outer surface of the inner pipe ( 20 ) at least in parts of their interface, in which, in a production line, the tubular element is simultaneously heated and drawn, wherein each portion of the tubular element is submitted to heating by induction and then to hot-drawing, wherein the tubular element is drawn with a mandrel located therein. Through this process, the existing mechanical connection between the pipes is trans- formed in a metallurgical connection. The invention also relates to a multilayer pipe ( 1 ) produced for this process, wherein the outer pipe ( 10 ) is made of a carbon manganese steel alloy and the inner pipe ( 2 ) is made of a corrosion-resistant alloy.

METHOD FOR PRODUCING METAL CYLINDER, METHOD FOR PRODUCING SUBSTRATE FOR ELECTROPHOTOGRAPHIC PHOTORECEPTOR, METHOD FOR MANUFACTURING ELECTROPHOTOGRAPHIC PHOTORECEPTOR, AND METAL SLUG FOR IMPACT PRESSING

A method for producing a metal cylinder includes preparing a metal slug having a surface adjusted so that the crystal grain diameter at a depth of 10 μm from the surface is smaller than that at a depth of 100 μm from the surface, and the crystal grain diameter at a depth of 10 μm from the surface is 30 μm or more and 120 μm or less; and forming a cylinder by impact pressing of the metal slug having the surface as a bottom. 1. A metal slug for impact pressing , wherein the metal slug has a surface adjusted so that a crystal grain diameter at a depth of 10 μm from the surface is smaller than a crystal grain diameter at a depth of 100 μm from the surface , and the crystal grain diameter at the depth of 10 μm from the surface is 30 μm or more and 120 μm or less.2. The metal slug for impact pressing according to claim 1 , wherein the crystal grain diameter at the depth of 100 μm from the surface is 50 μm or more and 160 μm or less. This application is a Divisional of U.S. application Ser. No. 15/226,170 filed Aug. 2, 2016, which is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2016-048865 filed Mar. 11, 2016, the contents of all of which are incorporated herein by reference in their entireties.The present invention relates to a method for producing a metal cylinder, a method for producing a substrate for an electrophotographic photoreceptor, a method for manufacturing an electrophotographic photoreceptor, and a metal slug for impact pressing.An apparatus which sequentially performs charging, exposure, development, transfer, cleaning, etc. by using an electrophotographic photoreceptor (may be referred to as a “photoreceptor” hereinafter) has been widely known as an electrophotographic image forming apparatus.Known electrophotographic photoreceptors include a function-separation-type photoreceptor in which a charge generation layer that generates charge by exposure and a charge transport layer that transports charge are laminated on a ...

DRAWING MACHINE FOR DRAWING TUBES

A drawing machine () for drawing a tube (), defining a longitudinal axis (Y), comprising a first die () for carrying out the drawing of the tube by means of the use of a mandrel (); a device for varying the inclination () of the tube inlet into said first die (); a second die () for carrying out a skin pass operation on the tube, arranged downstream of said first die (); an in-line system for detecting the eccentricity of the tube; a data processing system () for processing signals originating from said detection system and sending input data to said device for varying the inclination () of the tube to vary the inclination of the tube so as to correct the eccentricity of the tube in-line; wherein said in-line system for detecting the eccentricity of the tube comprises a first detection head comprising at least three first transducers () arranged downstream of said first die (). 1. A drawing machine for drawing a tube , defining a longitudinal axis , comprising:a first die for carrying out a drawing of the tube by means of a mandrel;an inclination variation device for varying the inclination of the tube entering into said first die;an in-line detection system for detecting an eccentricity of the tube;a data processing system for processing signals originating from said in-line detection system and sending input data to said inclination variation device to vary the inclination of the tube so as to correct the eccentricity of the tube in-line;characterized in that there is provided a second die for earning out a skin pass operation on the tube, which is arranged downstream of said first die, and in that said in-line detection system comprises a first detection head arranged downstream of said first die and comprising at least three first transducers.2. A machine according to claim 1 , wherein said first detection head is arranged in a die holder of said second die and/or in a chamber claim 1 , coaxial to the longitudinal axis claim 1 , provided between a die holder of ...

LOW-TEMPERATURE HIGH-STRENGTH-AND-DUCTILITY HIGH MANGANESE STEEL, AND HIGH MANGANESE STEEL PLATE AND HIGH MANGANESE STEEL TUBE MANUFACTURING PROCESS

The present invention discloses a machining technology of a low-temperature high-strength-ductility high manganese steel, high manganese steel plate, and high manganese steel tube, and a high manganese steel comprises the following components in percentage by weight: Mn 30%-36%, C 0.02%-0.06%, S≦0.01%, P≦0.008% and the balance being Fe. Smelted steel ingots are subject to solution treatment and are rolled and homogenized to obtain a high manganese steel plate or are drawn to form a high manganese steel tube. The hot-rolled or cold-rolled steel plate after being hot-rolled has tremendous application value in the fields of low-temperature applications, such as the steel plate used for a low temperature pressure container. 1. A low-temperature high-strength-ductility high manganese steel , comprising the following components in percentage by weight: Mn 30%-36% , C 0.02%-0.06% , S≦0.01% , P<0.008% and the balance being Fe.2. The low-temperature high-strength-ductility high manganese steel of claim 1 , wherein the content of Mn in percentage by weight is 32%-35%.3. The low-temperature high-strength-ductility high manganese steel of claim 1 , wherein the content of Mn in percentage by weight is 34%-34.5%.4. A machining technology of the low-temperature high-strength-ductility high manganese steel plate claim 1 , comprising process steps of smelting high manganese steel claim 1 , post-treating a steel ingot claim 1 , and cogging and rolling to form a plate claim 1 , wherein the process steps comprise the following parameters:A. smelting the high manganese steel: calculating a feeding ratio according to the percentage by weight of components in the high manganese steel: Mn 30%-36%, C 0.02%-0.06%, S≦0.01%, P≦0.008% and the balance being Fe, and smelting the components into the steel ingot;B. post-treating the steel ingot: keeping the steel ingot smelted in step A under the condition of 1150 DEG C.-1200 DEG C. and performing heat treatment for 2-4 hours, and then transferring ...

THIN, NARROW TUBE AND DRAWING APPARATUS AND DRAWING METHOD FOR MANUFACTURING THE SAME

Provided is a thin, narrow tube for use in a biodegradable medical device formed from a round tube made of a magnesium material as the base material, in which a desired outer diameter and an inner diameter are provided with good precision over the entire region in a longitudinal direction and a circumferential direction, and the length of biodegradation time can be controlled without changing a material composition. The thin, narrow tube is a thin, narrow tube of a biodegradable medical device, in which the thin, narrow tube is a round tube made of crystals containing magnesium (Mg) having a hexagonal crystal structure, and when the crystals forming the round tube are viewed in a round tube axis direction of the round tube, a hexagonal basal plane (0001) is oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction (a direction from an inner surface to an outer surface) of the round tube. 1. A drawing apparatus for manufacturing a tube of a biodegradable medical device , said tube comprising a round tube made of a magnesium alloy (Mg) having a hexagonal crystal structure , andthe magnesium alloy forming the round tube, viewed in a round tube axis direction of the round tube, has hexagonal basal planes (0001) of crystals of magnesium alloy oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction of the round tube,the drawing apparatus comprising at least:first means including a part α which surrounds the round tube while being in contact with the round tube in a circumferential direction to reduce a diameter of the round tube; andcylindrical second means which is disposed to oppose a minimum inner diameter portion of the part α and of which a side surface supports the round tube,wherein a center axis of the minimum inner diameter portion and a center axis of the second means coincide with a drawing direction of the round tube,the ...

THIN, NARROW TUBE AND DRAWING APPARATUS AND DRAWING METHOD FOR MANUFACTURING THE SAME

Provided is a thin, narrow tube for use in a biodegradable medical device formed from a round tube made of a magnesium material as the base material, in which a desired outer diameter and an inner diameter are provided with good precision over the entire region in a longitudinal direction and a circumferential direction, and the length of biodegradation time can be controlled without changing a material composition. The thin, narrow tube is a thin, narrow tube of a biodegradable medical device, in which the thin, narrow tube is a round tube made of crystals containing magnesium (Mg) having a hexagonal crystal structure, and when the crystals forming the round tube are viewed in a round tube axis direction of the round tube, a hexagonal basal plane (0001) is oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction (a direction from an inner surface to an outer surface) of the round tube. 1. A thin , narrow tube of a biodegradable medical device ,wherein the thin, narrow tube is a round tube made of crystals containing magnesium (Mg) having a hexagonal crystal structure, andwhen the crystals forming the round tube are viewed in a round tube axis direction of the round tube, a hexagonal basal plane (0001) is oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction of the round tube.2. The thin claim 1 , narrow tube according to claim 1 ,wherein the orientation is specified in a pole figure obtained by using an electron back-scatter diffraction (EBSD) method performed on a radial cross-section of the round tube, anda strong signal caused by a high-density orientation structure A having a peak intensity of 6/7 or more of a maximum peak intensity in the hexagonal basal plane (0001) is observed within an inclination angle of ±30° with respect to the circumferential direction, and the high-density orientation structure A is oriented.3. ...

METALLIC INGOT FOR IMPACT PRESSING, CYLINDRICAL METAL MEMBER, AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR

A metallic ingot for impact pressing includes a contact surface of the metallic ingot to contact a male mold in impact pressing having a maximum height roughness Rz of 20 μm to 50 μm and an average length of a roughness curve element RSm of 150 μm to 400 μm, the male mold being to be used in combination with a female mold in the impact pressing. 1. A metallic ingot for impact pressing ,wherein a contact surface of the metallic ingot to contact a male mold in impact pressing has a maximum height roughness Rz of from 20 μm to 50 μm and an average length of a roughness curve element RSm of from 150 μm to 400 μm, the male mold is to be used in combination with a female mold in the impact pressing.2. The metallic ingot according to claim 1 ,wherein the contact surface of the metallic ingot to contact a male mold in impact pressing has a maximum height roughness Rz of from 25 μm to 45 μm.3. The metallic ingot according to claim 1 ,wherein the contact surface of the metallic ingot to contact a male mold in impact pressing has a maximum height roughness Rz of from 30 μm to 40 μm.4. The metallic ingot according to claim 1 ,wherein the contact surface of the metallic ingot to contact a male mold in impact pressing has an average length of the roughness curve element RSm of from 200 μm to 350 μm.5. The metallic ingot according to claim 1 ,wherein the contact surface of the metallic ingot to contact a male mold in impact pressing has an average length of the roughness curve element RSm of from 220 μm to 300 μm. This application is a Divisional of U.S. application Ser. No. 15/485,815 filed Apr. 12, 2017, which is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2016-246897 filed Dec. 20, 2016, the disclosures of which are incorporated herein in their entirety by reference.The present invention relates to a metallic ingot for impact pressing, a cylindrical metal member, and an electrophotographic photoreceptor.In the related art, as an ...

Method For Producing Different Wall Thicknesses Of A Container Tube

Method for producing a container tube (), in particular a supporting means for a motor vehicle strut, with longitudinal sections of tube (I-IV) of different wall thicknesses and/or inner and/or outer diameters, following one after the other in the longitudinal direction, starting from a hollow and/or tubular blank (), by means of repeated drawing and wall ironing by means of at least one drawing and wall ironing female die (), applied to the outside of the blank, towards a male die (), for example a punch or mandrel, in contact with the inside of the blank, wherein, for at least some of the longitudinal sections (I-IV), a change of the male die is carried out before they are drawn and wall ironed. 11516131691922. A method for producing a container tube () with consecutive longitudinal sections of tube (kV) in the longitudinal direction of different wall thicknesses or inner and/or outer diameters , for use as a container , bracing or a support for a motor vehicle strut , starting from a hollow or tubular blank () , which by means of repeated drawing and wall ironing by means of at least one drawing and wall ironing female die ( , , ) applied to the outside of the blank towards a male die ( , , ) in contact with the inside of the blank , said tube is stretched for at least a part of the longitudinal sections (I-IV) and its wall thickness or its inner or outer diameter is reduced by a specified dimension each time the tube is stretched , wherein for at least some of the longitudinal sections (kV) to be reduced , a change of the male die is carried out before the tube is drawn and wall ironed.2. The method according to claim 1 , in which in a first drawing and wall ironing operation a first longitudinal section with reduced wall thickness is formed.31112919221461316. The method according to claim 2 , wherein the respective wall thickness of the tube is sized by using the one or multiple outside dimensions ( claim 2 , ) of one or multiple male dies ( claim 2 , claim 2 , ...

METHOD FOR MANUFACTURING COLD-FORGED, EXTRUDED ALUMINUM ALLOY TUBE

A method for manufacturing a cold-forged, extruded aluminum alloy tube includes: providing a primary material made of an aluminum alloy material, and a first cold extrusion apparatus; processing the primary material to form a preform; subjecting the preform to a homogeneous annealing by heating to a temperature of about 410° C. to 510° C. and then cooling to a temperature of about 160° C. to 200° C.; testing the hardness of the preform; immersing the preform in a lubricant which is a lipid having a viscosity index equal to or greater than 170, a flash point equal to or greater than 240° C., a pour point equal to or greater than −24° C., and a fire point equal to or greater than 255° C.; and subjecting the preform to cold extrusion. 1. A method for manufacturing a cold-forged , extruded aluminum alloy tube , comprising the steps of(A) providing a primary material having a hollow columnar shape and made of an aluminum alloy material, and a first cold extrusion apparatus including a first cold extrusion die, and a first ram and a first plunger corresponding in position to the first cold extrusion die, the first plunger extending downwardly from the first ram;(B) processing the primary material to form a preform that extends along an axis and that has a first end surface and a second end surface opposite to each other along the axis, an inner circumferential surface between the first end surface and the second end surface and defining a central bore, and an outer circumferential surface opposite to the inner circumferential surface, the preform further having an original length extending from the first end surface to the second end surface, and an original outer diameter measured across the outer circumferential surface, each of the first end surface, the second end surface and the outer circumferential surface having a surface roughness controlled at equal to or less than 0.04 μm Ra, each of the original outer diameter and the original length having a tolerance of ...

CATERPILLAR-TRACTION DRAWING MACHINE AND DRAWING METHOD

A caterpillar-traction drawing machine and a method for drawing of elongated workpieces can be provided with at least one drawing tool fastened pivotally on a tool holder and/or with at least two identical drawing recesses, which can be brought selectively into a drawing position, so that the influence of any fatigue phenomena at may exist is minimized. For the same reason, a caterpillar-traction drawing machine is advantageous in which the two chains of the caterpillar-traction unit are block chains and are respectively braced via an idler roller chain including idler rollers on respectively one pressing beam. 1. A caterpillar-traction drawing machine for drawing of an elongated workpiece in a drawing direction along a drawing line comprising:(a) a drawing die; and(b) a caterpillar-traction unit disposed in the drawing direction down-line from the drawing die;wherein the caterpillar-traction unit comprises:at least first and second revolving chains having at least first and second tool holders, respectively, carrying first and second drawing tools, respectively, in first and second drawing positions, respectively;a press for application of a pressing force on the first and second drawing tools with a component of the pressing force directed toward the drawing line; and(c) a gripping region;wherein the first and second drawing tools are provided with at least first and second drawing recesses, respectively, in the first and second drawing positions, respectively, in the gripping region and rest with the first and second drawing recesses, respectively, on the workpiece and by the press are pressed against the workpiece; andwherein at least the first tool is fastened pivotally on the first tool holder or has at least two identical first drawing recesses selectively able to be brought into the first drawing position.2. The caterpillar-traction drawing machine according to claim 1 , wherein the first drawing tools is fastened pivotally on the first tool holder and has ...

HEAT TRANSFER TUBE, HEAT EXCHANGER, AND METHOD FOR MANUFACTURING HEAT TRANSFER TUBE

A heat transfer tube is made of aluminum and includes a streak-shaped Zn diffusion layer () which is spirally formed on a circular outer peripheral surface in a length direction. According to this heat transfer tube, even in a case where rainwater or dew concentration water is intensively accumulated in a portion of the outer peripheral surface in a circumferential direction, it is possible to obtain a sufficient corrosion resistance. 1: A heat transfer tube made of aluminum , comprising:a streak-shaped Zn diffusion layer which is spirally formed on a circular outer peripheral surface along a length direction.2: The heat transfer tube according to claim 1 ,wherein the Zn diffusion layer is provided in a region of 50% or more of the circular outer peripheral surface.3: The heat transfer tube according to claim 1 ,wherein an average Zn concentration of an entire outer peripheral surface is from 3 mass % to 12 mass %.4: The heat transfer tube according to claim 1 ,wherein a maximum Zn concentration of a portion of the circular outer peripheral surface in a circumferential direction is 15% or less.5: The heat transfer tube according to claim 1 ,wherein an average diffusion depth of 0.3% Zn concentration is from 80 μm to 285 μm.6: The heat transfer tube according to claim 1 ,wherein a lead angle of the Zn diffusion layer is 8° or more.7: The heat transfer tube according to claim 1 ,wherein an outer diameter of the heat transfer tube is from 4 mm to 15 mm,wherein a bottom wall thickness of the heat transfer tube is from 0.2 mm to 0.8 mm, andwherein a plurality of fins which are spirally formed along the length direction are provided on an inner peripheral surface of the heat transfer tube.9: The heat transfer tube according to claim 1 ,wherein the heat transfer tube is inserted into insertion holes of a plurality of heat sinks which are arranged to be parallel to each other at predetermined intervals, is expanded in a diameter, and thus, is connected to the heat sinks.10: ...

Cylinder Tube Closed At The End So As To Be Fluid-Tight And Method For Production Thereof

A method for producing a cylinder tube (), which is closed at the end so as to be fluid-tight, from a tubular blank (). The blank () is formed into the cylinder tube () with the aid of a cold forming method in such a way that on an end region () of the cylinder tube () an opening () remains in the cylinder tube (), a mounting region () is produced in the radially outer edge region () of the end region () and the cylinder tube () is closed by fluid-tight attachment on the mounting region () of an end piece () which closes the opening (). A cylinder tube () comprises the cylinder tube () cold formed from the blank () having an opening () at the end, the mounting region () and an end piece () attached to the mounting region () so as to be fluid-tight. 1230. A method for producing a cylinder tube () , which is closed at an end so as to be fluid-tight , for a shock absorber tube of a shock absorber of a motorized vehicle , from a tubular blank () , characterized by the following steps:{'b': 30', '2', '8', '30', '6', '2, '(a) forming the blank () into a cylinder tube () by means of a sheet metal deep-drawing cold forming process with an opening () remaining in the cylinder tube () on an end region () of the cylinder tube (),'}{'b': 12', '10', '6, '(b) producing a mounting region () in a radially outer edge region () of the end region (),'}{'b': 2', '14', '12', '8, '(c) sealing the cylinder tube () in fluid-tight attachment by welding of an end piece () to the mounting region (), said end piece closing the opening () to be fluid-tight.'}21683026301216. The method according to claim 1 , in which with the cold forming process a driver edge () claim 1 , which surrounds the opening () for the cold forming process forming the blank () into the cylinder tube () claim 1 , is shaped on the end region () of the blank () claim 1 , and at least a part of the mounting region () is shaped as at least a part of the driver edge ().3122. The method according to claim 2 , in which the ...

Composite tube with a sacrificial layer for very thin wall heat exchangers

Composite tube assemblies and thin-walled tubing are disclosed. In embodiments, the composite tube assemblies include a functional tube and a sacrificial tube disposed within or around the functional tube. The sacrificial tube may be removed by exposure to a corrosive media, without substantially affecting the functional tube. Methods of forming composite tube assemblies and thin-walled tubing are also described.

Apparatus for calibrating and surfacing tubes

An improvement in a process and apparatus for internal finishing and calibrating tubes is provided in which the internal surface of the tube is sprayed during the work on the tube with at least one lubricating jet directed to the work zone ahead of the passage of the tool.

容器及容器的制造方法

本发明涉及容器以及容器的制造方法，该容器具有厚壁的有底容器，该厚壁的有底容器是通过在成形用模体中将金属坯热扩张，将底部和筒部一体地成形，上述有底容器其外径为1000mm以上、3000mm以下，其壁厚为150mm以上、300mm以下。该容器的制造方法备有装入工序和热扩张成形工序；在装入工序，把侧面至少备有一个平面且在加压方向的后方侧的端部具有与成形用模体的入口端部相接合的伸出部的金属坯与成形用模体内壁留有间隙地装入成形用模体内；在热扩张成形工序，把冲孔冲头推入金属坯内，将其平面朝内壁侧弯曲地将金属坯热扩张成形。

Method of manufacturing a ribbed pipe

FIELD: manufacturing technology.SUBSTANCE: invention relates to the field of production of ribbed pipes by cold drawing on a mandrel. Method for manufacturing finned tube (15), which has plurality of first spiral ribs (12) on the inner surface and the outer diameter is not more than 34 mm, includes the stage of preparation of a steel pipe with a tensile strength of not more than 600 MPa and a step of manufacturing the ribbed tube by cold drawing a steel pipe using mandrel (2) having plurality of helical grooves (21) and plurality of second spiral ribs (22), each of which is located between adjacent spiral grooves (21), while the mandrel parameters are governed by mathematical relationships.EFFECT: method makes it possible to avoid jamming of the mandrel during cold drawing.5 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 664 494 C1 (51) МПК B21C 37/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК B21C 37/20 (2006.01) (21)(22) Заявка: 2017122143, 24.11.2015 (24) Дата начала отсчета срока действия патента: Дата регистрации: 17.08.2018 25.11.2014 JP 2014-238171 (45) Опубликовано: 17.08.2018 Бюл. № 23 (56) Список документов, цитированных в отчете о поиске: JP 2005221153 A, 18.08.2005. SU (85) Дата начала рассмотрения заявки PCT на национальной фазе: 26.06.2017 202856 A, 12.12.1967. SU 1082504 A, 30.03.1984. SU 1650294 A1, 23.05.1991. (86) Заявка PCT: 2 6 6 4 4 9 4 R U (87) Публикация заявки PCT: WO 2016/084361 (02.06.2016) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ ИЗГОТОВЛЕНИЯ РЕБРИСТОЙ ТРУБЫ (57) Реферат: Изобретение относится к области трубы с использованием оправки (2), имеющей производства ребристых труб холодным множество спиральных канавок (21) и множество волочением на оправке. Способ изготовления вторых спиральных ребер (22), каждое из которых ребристой трубы (15), которая имеет множество расположено между смежными ...

一种离心机用冷型毛坯锻造方法

本发明公开了一种离心机用冷型毛坯锻造方法，属于锻造技术领域，所述冷型毛坯采用锻造方法制备，具体步骤如下：A、预处理：将冶炼制得的钢锭切除冒口下料，然后在加热炉内加热至一定温度；B、镦粗和冲孔：将切除冒口下料的钢锭立料镦粗，镦粗比大于2.0，镦粗后采用冲头冲孔，得到冲孔坯料；C、扩孔和拔长：将冲孔坯料返回加热炉加热，温度提高40～50℃，进行扩孔和芯轴拔长，得到拔长坯料；D、锻造凹档：将拔长坯料通过锤头锻造出凹档，得到冷型毛坯，本发明制得的冷型毛坯组织更致密、均匀，使产品获得一定的强度和抗疲劳性能，满足质量及尺寸要求，达到改善锻件质量，延长使用寿命的目的。

Apparatus and method for continuous extrusion

一种多层金属复合管材制备方法

本发明公开了一种多层金属复合管材制备方法，该方法包括以下步骤：坯料管内外修磨、油污清洗、多层金属管组套、拉拔缩径、管端管面高速摩擦焊接、加热处理、四辊式横轧、矫直处理、二辊冷轧、冷拔减径、冷扩减壁扩径、精密冷轧、去油脂处理、光亮处理、表面修磨处理、灰尘清扫、多层金属界面结合检测、探伤检测、金属组织性能检测、定尺、包装处理，利用将冷拔减径、冷扩减壁扩径、精密冷轧多次循环，实现产品尺寸精度、表面质量、材料性能、晶粒度等关键指标的协同控制，获得精度较高、性能更优、极限规格更突出的产品。解决了因金属性能差异出现延伸不一致的问题。制备的复合管材结合能力强，可以极大地提高多层异种金属之间的结合率。

Method and device for drawing

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method of detecting preceding feature and apparatus for detecting preceding feature jump and method of producing cold pipe using the method of detecting preceding feature

FIELD: production of fittings. SUBSTANCE: invention relates to drawing pipes in cold state. Method involves a step of measuring the force applied to the rod to hold the mandrel in the direction of drawing and the stage of detection of preceding feature jump motion at the stage before the onset of discontinuous movement based on measuring the force values obtained at the stage of force measuring. At that stage of detection of the preceding feature includes a step of frequency analysis of values for measuring the force, obtained at the stage of changing forces in the specified frequency band, and a step of estimating the onset of the preceding feature jump motion when the peak intensity of the frequency spectrum, obtained by frequency analysis, exceeds preset reference value. EFFECT: increase of quality of pipe. 3 cl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 603 398 C2 (51) МПК B21C 1/24 (2006.01) B21C 51/00 (2006.01) G01H 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014150875/02, 02.05.2013 (24) Дата начала отсчета срока действия патента: 02.05.2013 (72) Автор(ы): ХАНАДА, Такуя (JP) (73) Патентообладатель(и): НИППОН СТИЛ ЭНД СУМИТОМО МЕТАЛ КОРПОРЕЙШН (JP) Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 10.07.2016 Бюл. № 19 R U 16.05.2012 JP 2012-112342 (45) Опубликовано: 27.11.2016 Бюл. № 33 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 16.12.2014 2 6 0 3 3 9 8 (56) Список документов, цитированных в отчете о поиске: JP 10225712 A, 25.08.1998. WO 2013172208 A1, 21.11.2013. RU 2144442 C1, 20.01.2000. FR 2169906 A, 14.09.1973. SU 995958 A, 25.02.1983. (86) Заявка PCT: 2 6 0 3 3 9 8 R U C 2 C 2 JP 2013/062751 (02.05.2013) (87) Публикация заявки PCT: WO 2013/172208 (21.11.2013) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ ОБНАРУЖЕНИЯ ПРЕДШЕСТВУЮЩЕГО ПРИЗНАКА И ...

Device for drawing sectional material

Способ обнаружения предшествующего признака и устройство обнаружения предшествующего признака скачкообразного движения и способ волочения в холодном состоянии трубы или трубки с применением способа обнаружения предшествующего признака

1. Способ обнаружения предшествующего признака для обнаружения предшествующего признака скачкообразного движения в ходе волочения в холодном состоянии трубы или трубки волочильным станом, включающим в себя волоку, оправку, расположенную в волоке, и стержень для удерживания оправки, при этом способ обнаружения предшествующего признака скачкообразного движения содержит:этап измерения усилия для измерения усилия, прилагаемого к стержню для удерживания оправки в направлении волочения в ходе заданного периода от исходной точки измерения до конечной точки измерения после начала волочения; иэтап обнаружения предшествующего признака для обнаружения предшествующего признака скачкообразного движения на основе величин измерения усилия, полученных на этапе измерения усилия.2. Способ по п. 1, в котором на этапе обнаружения предшествующего признака осуществляют частотный анализ величин измерения усилия в заданной полосе частот, и осуществляют оценку того, что возник предшествующий признак скачкообразного движения, когда пиковая интенсивность частотного спектра, полученного посредством частотного анализа, превышает заданное опорное значение.3. Способ волочения в холодном состоянии трубы или трубки, в котором, когда предшествующий признак скачкообразного движения обнаружен посредством способа обнаружения предшествующего признака по п. 1 или 2, скорость волочения трубы или трубки волочильным станом снижают.4. Устройство обнаружения предшествующего признака для обнаружения предшествующего признака скачкообразного движения в ходе волочения в холодном состоянии трубы или трубки волочильным станом, включающее в себя во РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2014 150 875 A (51) МПК B21C 1/24 (2006.01) B21C 51/00 (2006.01) G01H 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2014150875, 02.05.2013 (71) Заявитель(и): НИППОН СТИЛ ЭНД СУМИТОМО МЕТАЛ КОРПОРЕЙШН (JP) Приоритет(ы): (30) Конвенционный приоритет: 16.05.2012 JP 2012- ...

Patent JPS4862655A

Switchboard having aluminum section bus bar

PURPOSE: A switchboard arranging a busbar of aluminum shape steel is provided to maximize nature ventilation effect through convection by forming a gap between a first aluminum shape steel and a second aluminum shape steel. CONSTITUTION: A load breaker switch(3) supplies or blocks high-voltage current of each electric line to a load. A power fuse(5) blocks short circuit current by connecting an busbar extended from the load breaker switch. An instrument transformer(7) checks voltage and current from the each electric line. A vacuum circuit breaker(9) protects the circuit by opening and closing the normal current or the short circuit current. A transformer(11) attenuates AC voltage which is put through the busbar with a constant rate.

Method of continuous extrusion of long-sized billet

1400874 Extruding; drawing WESTERN ELECTRIC CO Inc 17 Nov 1972 [17 Nov 1971] 53178/72 Heading B3P An apparatus for the continuous extrusion of an elongated workpiece 2 through a die 12, Fig. 10, comprises sets of segmented gripping jaws 4 which move in endless paths 6 and co-operate on the innermost part of their paths to feed the workpiece to the die and effect the extrusion. The workpiece 2 is coated with a shear transmitting medium such as beeswax or polyethylene wax in two chambers 82, 83, Fig. 4, before reaching the feeding jaws. A sizing die 73 is provided between the chambers and a wiper 79 removes dirt from the workpiece before coating and a wiper 71 determines the thickness of the coating. The coating acts as a lubricant for both the sizing die and the extrusion die and is progressively pressurized by the jaws to beyond the yield strength of the workpiece. The gripping jaws are moved in the feed direction by staggered pinions 5a-5d, 25a- 25d, Fig. 5, which engage teeth on the outside of the jaws. The pinions are housed in a gear block 14 provided with gears trains and fluid driven motors for the pinions, Fig. 3 (not shown). The gear block 14 has a bore 16 to guide the jaws aligned with the bore of a pressure cylinder 11 and the bore of a further gear block 15 downstream of the extrusion die. The gear block 15 also has pinions 27a-27d engaged with the jaws but these pinions drive fluid pumps so that the jaw feed is retarded by the pinions to keep the jaws closely adjacent. The pressure cylinder 11 is internally lined by a sleeve (34), Fig. 8 (not shown), and a segmented sleeve (38a)-(38d), Fig. 9 (not shown). The segments define bores 40 for electrical heaters and supports guiding bars (42) for the jaws. The jaws are urged inwards by fluid pressure to sets of chambers (52a)-(52d), behind the jaws to pressurize the shear transmitting medium. A set of pressure reducing valves (53a)-(53d), (54a)-(54d), (55a)-(55d), Fig. 8 (not shown), ensure that the pressure ...

Rhombus roller press and energy-gathered cutting cable processing device thereof

本发明公开了一种菱形辊压机及其聚能切割索加工装置，包括：菱形辊压机，用于将圆管加工成扁管；V形辊压机，用于将扁管加工成V形管；预压输送模块用于对聚能切割索端部进行预压、输送聚能切割索。预压输送模块包括：输送机构，用于输送切割索；第一预压机构，用于在圆管一端压出扁管；第二预压机构，用于在扁管一端压出凹槽，以获得槽管。本发明可以实现切割索从圆管状态逐渐加工至“V”形状态，且采用辊压和冷拔综合的设计，能够实现切割索的快速加工，因此效率较高，目前样机效率已经能达到合格品一天20根左右。另外通过过载设计，使得不易卡管，同时还能自动纠偏，从而既提高效率，又提高了合格率。

Energy-gathering cutting cable processing device

本发明公开了一种聚能切割索加工装置，包括菱形辊压机，用于将圆管加工成扁管；V形辊压机，用于将扁管加工成V形管；预压输送模块用于对聚能切割索端部进行预压、输送聚能切割索。预压输送模块包括：输送机构，用于输送切割索；第一预压机构，用于在圆管一端压出扁管；第二预压机构，用于在扁管一端压出凹槽，以获得槽管。本发明可以实现切割索从圆管状态逐渐加工至“V”形状态，且采用辊压和冷拔综合的设计，能够实现切割索的快速加工，因此效率较高，目前样机效率已经能达到合格品一天20根左右。另外通过过载设计，使得不易卡管，同时还能自动纠偏，从而既提高效率，又提高了合格率。

Apparatus for detecting the sticking of metal on drawbench holder

Изобретение относитс  к обработке металлов давлением и может использоватьс  при холодном волочении высоколегированных марок сталей и сплавов. Цель изобретени  - обеспечение надежного определени  момента возникновени  налипани  металла на оправку. Это достигаетс  введением новых блоков и функциональных св зей, позвол ющих фиксировать незначительные изменени  осевых усилий на стержень оправки, возникающих в начальной стадии процесса налипани  металла на оправку, и исключить ложные срабатывани  в момент начала волочени . 4 ил. с (Л ОО ел оО5 00 The invention relates to the processing of metals by pressure and can be used during cold drawing of high alloy steels and alloys. The purpose of the invention is to provide a reliable determination of the moment of occurrence of metal sticking to the mandrel. This is achieved by introducing new blocks and functional connections, which allow to fix minor changes in axial forces on the mandrel bar, which arise in the initial stage of the metal sticking to the mandrel, and eliminate false alarms at the moment of the beginning of the drawing. 4 il. with (L OO ate oO5 00

Method of manufacturing thick-walled small diameter pipe

내용 없음. No content.

Method for manufacturing seamless pipe

一种无缝钢管的制造方法，该无缝钢管的制造方法包括以下步骤：向空心钢坯内插入芯棒并通过锻造将该空心钢坯加工为规定的直径和厚度的毛管的步骤；对上述毛管的一端进行颈缩加工的步骤；以及向一端被颈缩加工后的上述毛管内插入顶杆并使用顶管机进行冲压加工的步骤。根据该方法，能够以较高的尺寸精度、特别是较高的壁厚尺寸精度制造可制造范围较宽(大径、厚壁)的无缝钢管。

Method for manufacturing large-caliber high-strength thick-wall cold drawn pipe

本发明公布一种大口径高强厚壁冷拔管制作方法，属于冷拔管技术领域。包括如下步骤：坯料选择、表面处理、第一道冷拔、第二道冷拔、校直、成品热处理、校直、下料测量；所述第一道冷拔：将内模、外模安装在冷拔设备上，内模后端的内模定径带伸出外模后端的外模定径带外5~30mm；对坯料进行第一次冷拔；所述第二道冷拔：调整内模，使内模定径带与外模定径带后端相对齐；对坯料进行第二次冷拔。本发明虽需要冷拔两次，但无需更换模具，无传统两道次冷拔工艺上的模具换型时间；本方案中的第二次拉拔属于微变形，在微塑性变形的作用下产生尺寸效应，起到调整改善冷拔管直线度、圆度和光洁度的作用，为后续校直工序提供方便。

Method of producing trimetal rod and wire articles

FIELD: technological processes. SUBSTANCE: invention is intended for the production of trimetallic bar and wire products by drawing. Proposed method comprises forming hook on article with sharpened and conical sections and drawing through tapered channel of monolithic drawing die. Die is used with a predetermined angle of inclination of the generatrix of the conical channel to the axis of drawing. EFFECT: invention makes it possible to reduce the energy consumption of the drawing process by using a dredge with an optimal angle of inclination of the generatrix of the working channel to the axis of drawing. 1 cl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 669 260 C1 (51) МПК B21C 1/20 (2006.01) B21C 3/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК B21C 1/20 (2006.01); B21C 3/00 (2006.01) (21)(22) Заявка: 2017132024, 12.09.2017 (24) Дата начала отсчета срока действия патента: 09.10.2018 Приоритет(ы): (22) Дата подачи заявки: 12.09.2017 (45) Опубликовано: 09.10.2018 Бюл. № 28 (56) Список документов, цитированных в отчете о поиске: RU 2492011 C1, 10.09.2013. RU (54) СПОСОБ ПРОИЗВОДСТВА ТРИМЕТАЛЛИЧЕСКИХ ПРУТКОВЫХ И ПРОВОЛОЧНЫХ ИЗДЕЛИЙ (57) Реферат: Изобретение предназначено для производства заданным углом наклона образующей триметаллических прутковых и проволочных конического канала к оси волочения. изделий волочением. Способ включает Изобретение позволяет снизить энергоемкость предварительное формирование на изделии процесса волочения за счет применения волоки захватки с заостренным и коническим участками с оптимальным углом наклона образующей и последующее волочение через конический канал рабочего канала к оси волочения. монолитной волоки. Используют волоку с R U 2 6 6 9 2 6 0 2480301 С1, 27.04.2013. RU 2536849, 27.12.2014. RU 2404873, 27.11.2010. US 6715332 А1, 06.04.2004. KR 20020086235 А1, 18.11.2002. Стр.: 1 C 1 C 1 Адрес для переписки: 614990, Пермский край, г. Пермь, Комсомольский пр-кт, 29, Пермский ...

Method and apparatus for manufacturing moulds formed of metal tubes, to be used in continuous casting machines for billets and blooms

The present invention relates to a method and apparatus for manufacturing moulds which are circular arc type. A tubular blank 10 is bent into an arched form by means of a die 3, 4 conforming to the outer dimensions of the desired tube mould, and a plug 11 is drawn in an expanding draw through the tubular blank so that the path of motion of the plug is arched, which operation causes the outer surface of the tubular blank to be pressed against the die and the inner surface of the mould to be cold-worked to match the dimensions of the plug. <IMAGE>

DRAWING TOOL

Methods and equipment for producing prismatic battery cell containers

Tube expanding method for manufacturing metal tube

내면 공구에만 의한 확관 제조에서는 종래, 제조 조건 결정에 시간을 필요로 하고, 비용도 들었다. 구체적으로는, 확관 가공 시뮬레이션에 의해 피가공재 (10) 선단이 공구 (1) 의 숄더부 (3) 를 통과하고 나서 1.0 m 이상 진행된 상태에 있어서의 피가공재 형상을 평가하고, 그 형상이 외경에서 목표의 ± 1 ％ 이내, 두께에서 목표의 ± 7.5 ％ 이내에 들어가고, 또한 공구와의 내면 간극이 1.0 ㎜ 이내가 되는 소관 형상 및 공구 형상을 반복 계산으로 구하여, 이것을 실제 확관 제조 조건으로 한다. Conventionally, in the manufacture of an expanded tube only by an inner tool, it takes time to determine the manufacturing conditions, and the cost is also high. Specifically, the shape of the material to be processed in a state in which the tip of the material to be processed 10 advances by 1.0 m or more after the tip of the material to be processed 10 passes through the shoulder portion 3 of the tool 1 is evaluated by expanding machining simulation, The tube shape and the tool shape which are within ± 1% of the target and within the range of ± 7.5% of the target from the thickness and whose inner gap between the tool and the tool is within 1.0 mm are obtained by iterative calculation.

Pipe Inner Side Clamping Apparatus for Puller

A chucking shaft (10) having a cylindrical portion (11) having a cylindrical shape and a conical portion (12) having a larger cross sectional area at the end of the cylindrical portion (11) at the front end; Chucking axis transfer means (20) for moving the chucking shaft (10) forward or backward; A clamping holder (30) installed in front of the chucking shaft transfer means (20) and through which the cylindrical portion (11) of the chucking shaft (10) is inserted and coupled; The chucking shafts 10 are hinged to the front ends of the clamping holders 30 so that the chucking shafts 10 are divided into three to five radial parts. A clamping part 40 for clamping the pipe 1 when the outer diameter of the conical part 12 of the pipe 1 is enlarged and widened so that the outer surface contacts the inner surface of the reduced diameter part 1a of the pipe 1; And a control unit.

Steel pipe cold-drawing equipment

本申请公开了一种钢管冷拔设备，包括上料轨、下料轨以及模具装置，模具装置安装于上料轨和下料轨之间，上料轨上安装的上料装置适于旋转地推动待冷拔的钢管穿过模具装置并伸至下料轨，下料轨上上安装的下料装置适于曳引待冷拔的钢管旋转地完全经过模具装置以完成冷拔；模具装置包括壳体和安装于壳体内的调节机构和冷拔模部件，冷拔模部件内设有冷拔腔，待冷拔的钢管通过旋转地经过冷拔腔以完成冷拔，调节机构适于调节冷拔腔的尺寸。本申请的有益效果：通过在模具装置内安装调节机构来对冷拔腔的尺寸进行调节，从而可以满足对钢管不同冷拔尺寸的需求。

METHOD OF STRENGTHENING AND CALIBRATION OF PIPE PART

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2015 148 348 A (51) МПК B21D 3/16 (2006.01) B21D 41/00 (2006.01) E04G 25/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2015148348, 10.04.2014 (71) Заявитель(и): ПЕРИ ГМБХ (DE) Приоритет(ы): (30) Конвенционный приоритет: 12.04.2013 DE 10 2013 206 577.9 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 12.11.2015 R U (43) Дата публикации заявки: 16.05.2017 Бюл. № 14 (72) Автор(ы): АНДРЕЕ, Юрген (DE), ШПЕХТ, Рудольф (DE) (86) Заявка PCT: (87) Публикация заявки PCT: WO 2014/167043 (16.10.2014) A Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" R U (57) Формула изобретения 1. Способ упрочнения и калибровки, по меньшей мере, тонкостенного участка (76) трубы, принадлежащего наружной трубе (12) телескопической опорной стойки (10) для сектора строительства, включающий в себя этапы, на которых: a) надевают на участок (76) трубы кольцо (64), причем внутренний диаметр кольца (64) соответствует наружному диаметру участка (76) трубы; b) вставляют пуансон (62) в участок (76) трубы, причем наружный диаметр пуансона (62) больше, чем внутренний диаметр участка (76) трубы, вследствие чего участок (76) трубы расширяется; c) вытаскивают пуансон (62) из участка (76) трубы; d) накрывают расширенный участок (76) трубы кольцом (64), тем самым сужая расширенный участок (76) трубы, при этом этап d) проводят после этапа c) или одновременно с этапом c) вследствие чего при осуществлении способа резьбу накатывают, по меньшей мере, на части участка (76) трубы. 2. Способ по п. 1, отличающийся тем, что пуансон (62) и кольцо (64) направляют с фиксированным промежутком между ними. 3. Способ по п. 1 или 2, отличающийся тем, что при его осуществлении наружную резьбу (36) накатывают, по меньшей мере, на части участка (76) трубы. 4. Способ по п. 1 или 2, отличающийся тем, что при его осуществлении резьбу в Стр.: 1 A 2 0 1 5 ...

V-shaped roller press and energy-gathered cutting cable processing device thereof

本发明公开了一种V形辊压机及其聚能切割索加工装置，包括：菱形辊压机，用于将圆管加工成扁管；V形辊压机，用于将扁管加工成V形管；预压输送模块用于对聚能切割索端部进行预压、输送聚能切割索。预压输送模块包括：输送机构，用于输送切割索；第一预压机构，用于在圆管一端压出扁管；第二预压机构，用于在扁管一端压出凹槽，以获得槽管。本发明可以实现切割索从圆管状态逐渐加工至“V”形状态，且采用辊压和冷拔综合的设计，能够实现切割索的快速加工，因此效率较高，目前样机效率已经能达到合格品一天20根左右。另外通过过载设计，使得不易卡管，同时还能自动纠偏，从而既提高效率，又提高了合格率。

tube drawing apparatus

본 발명에 따른 튜브 인발장치는 튜브의 축관을 위하여 점차적으로 작아지는 테이퍼부를 가지는 플러그와, 상기 플러그가 삽입되는 것으로 상기 테이퍼부와 대응되는 축관형성부와 상기 축관형성부로부터 연장되어 축관이 이루어진 튜브를 인출되는 튜브가이드부와 상기 튜브가이드부와 대응되는 측에 형성되어 상기 축관형성부로 인발을 위한 튜브의 인입을 가이드 하는 성형다이스부를 구비한 다이스와, 상기 다이스와 결합되는 플러그와 플러그의 외주면에 설치되어 자력을 이용하여 플러그를 회전시키는 플러그 회전유닛을 구비한다.

Continuous equal channel angular drawing with idle roll

A drawing type continuous shear deformation equipment with an idle roll is provided to mass produce a workpiece with improved mechanical properties continuously by continuously performing a conventional ECAP(Equal Channel Angular Pressing) process and continuously supplying a metal workpiece to a shear deformation mold, thereby shear deforming the workpiece without limiting the length of the workpiece. A drawing type continuous shear deformation equipment(100) with an idle roll comprises: first upper and lower molds(120,130) for forming an inflow part into which a workpiece(170) flows; second upper and lower molds(140,150) which shear deforms the workpiece and forms a discharge part for discharging the shear deformed workpiece; an idle roll(110) disposed between the first upper and lower molds and the second upper and lower molds to form a shear deforming part in an outlet of the first upper and lower molds and an inlet of the second upper and lower molds respectively; and a drawing device for drawing out and transferring the workpiece.

Automatic reduce apparatus for copper pipe

본 발명은 동관을 플러그 없이 자동으로 인발 성형하게 되어 작업을 편리하게 수행할 수 있는 동관 자동 인발장치에 관한 것으로, 일정 형태를 갖는 프레임부와, 상기 프레임부의 후면에 설치되어 동관을 이송하는 동관 이송부와, 상기 프레임부의 상부 측면에 설치되어 동관 이송부를 통해 이송되는 동관을 지지하는 지지부와, 상기 프레임부 상의 지지부 측면에 설치되어 동관 이송부를 통해 이송되는 동관이 일정한 위치에 정지할 수 있도록 동관의 이송을 조절하는 위치조정부와, 상기 프레임부 상의 위치조정부 측면에 설치되어 위치조정부에 의해 위치가 조정되고 지지부를 통해 지지되는 동관을 인발 성형하는 인발성형부를 포함하는 것을 특징으로 한다.

Radioactive substance containment vessel, and radioactive substance containment vessel producing device and producing method

热扩张成形所用的金属坯,其加压方向前方侧的断面形状是正方形,其对角线长度小于成形用模体的内径。其加压方向后方侧的断面形状是圆形,其直径略等于成形用模体的内径。把该金属坯加热到加压加工温度后,装入成形用模体内,用被压力加压机作动的冲孔冲头,一边对该金属坯的中心冲孔一边使其热扩张成形,成形为用于重屏蔽容器的有底容器。

Patent DE3514316C2

Hydraulic clamping device for pipes, rods or the like, especially for upsetting presses

Automatic machine for preparing the ends of metal pipes for drawing

Method for manufacturing Ultra high strength specially shaped pipe for vehicle stiffener with easily absorbing shock

본 발명은 충격 흡수가 용이한 자동차 보강재용 초고강도 이형관 제조방법에 관한 것으로, 내부가 관통된 중공형 강관을 준비하는 중공형 강관 준비단계, 상기 중공형 강관을 소정 형상의 이형으로 인발 성형하는 인발성형단계, 인발 성형된 상기 중공형 강관을 소정 길이로 절단하는 절단단계, 소정 길이로 절단된 상기 중공형 강관을 950℃ 이상의 온도에서 5분간 가열시키는 가열단계, 가열된 상기 중공형 강관을 프레스 금형으로 삽입하여 프레스 성형함과 동시에 냉각시키는 다이??칭단계 및 상기 다이??칭 처리단계를 거친 상기 중공형 강관을 소정 온도로 재가열하여 템퍼링 처리하는 템퍼링단계를 포함하여 구성되는 것을 특징으로 한다. The present invention relates to a method of manufacturing an ultra-high-strength release pipe for an automobile reinforcement with easy shock absorption, a hollow steel pipe preparation step of preparing a hollow steel pipe having a penetrating inside thereof, a drawing of pultrusion molding the hollow steel pipe into a release shape of a predetermined shape A forming step, a cutting step of cutting the pultruded hollow steel pipe to a predetermined length, a heating step of heating the hollow steel pipe cut to a predetermined length at a temperature of 950° C. or higher for 5 minutes, and a press mold for the heated hollow steel pipe And a tempering step of reheating the hollow steel pipe subjected to the die??ching treatment step and reheating the hollow steel pipe subjected to the die??ching treatment step to a predetermined temperature and tempering treatment.

A kind of acid cleaning of steel tube-cold-drawn machining production line

本发明公开了一种钢管酸洗‑冷拔加工生产线，包括酸洗池、吊装机和冷拔机，吊装机上设有用于夹持在钢管两端的夹具，吊装机包括设置在酸洗池上方的龙门架，龙门架上设有横移座，位于钢管两端的夹具分别呈可升降的设置在横移座上，上料架一侧设有用于输送钢管的输送架，输送架的末端设有锤头机构，冷拔机位于锤头机构一侧，开合气缸可驱动虎钳与钳臂连接处合拢，以控制虎钳合拢并使拉杆向槽口移动，与现有技术相比，本发明衔接酸洗和冷拔工序，同时在钢管的输送过程中完成锤头工作，并钢管提供向拔模座移动的动力，提高加工效率，降低劳动成本。

Rolling for profile shapes class product draws Joint Production equipment and its rolls drawing production technology

本发明公开了异型材类产品的轧拉联合生产设备及其轧拉生产工艺。生产设备包括引导装置、轧机、拉拔机和辅助装置，轧机为两道次连轧机，包括第一轧组、第二轧组、第三轧组和第四轧组，其中第一轧组和第二轧组组成第一轧制道次，第三轧组和第四轧组组成第二轧制道次，轧机控制工件的雏形；拉拔机为连续拉拔机，包括第一拉拔组和第二拉拔组，分别位于第一拉拔道次和第二拉拔道次；拉拔机还包括前后拉拔小车和箱体。轧拉生产工艺包括第一道次两连轧、退火、第二道次两连轧、退火、第一道次拉拔、第二道次拉拔等工序获得异型材类产品。

Skin stretcher for preparing aircraft skin

本发明公开了一种用于制备飞机蒙皮的蒙皮拉伸机，属于蒙皮拉伸液压机技术领域，其特征在于，机架包括固定横梁、钳口托架导轨梁、工作台导轨、龙门移动导轨；位于固定横梁上部的龙门上工作台包括龙门架、立柱、摆动油缸、龙门移动座，设置于固定工作台上方的龙门上工作台；立柱的下端与龙门移动座固定连接，立柱的上端与龙门架铰接；摆动油缸与龙门移动座铰接；摆动油缸通过活塞杆与龙门架铰接；龙门架上安装有主缸和导向机构；安装于固定横梁上的固定工作台；位于固定工作台两侧的安全踏台；设置于工作台导轨上的移动工作台；安装于钳口托架导轨梁上的钳口托架；安装于钳口托架上的钳口。本发明能够实现飞机蒙皮零件横向拉伸工艺和纵向拉伸工艺。

Method for continuously rolling copper pipe by planetary pipe mill

本发明涉及一种行星轧管机连续轧制铜管的方法，其特征在于：辊式送进机或者履带式送进机置于三辊行星轧管机入口，所述辊式送进机或者履带式送进机被三辊行星轧管机轧制的管坯带动呈被动旋转状态，所述辊式送进机或者履带式送进机被动旋转的同时连续不断给管坯提供送进力，将管坯逐根头尾相接连续不断送入三辊行星轧管机进行轧制。采用上述技术方案，结构简单、可靠、实用，满足连续轧制铜管的需要，避免了现有技术的不足，提高了生产效率。