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Небесная энциклопедия

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

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Мониторинг СМИ

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

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 14. Отображено 14.
23-06-2023 дата публикации

Laser-induced shock wave high-precision forming method

Номер: CN116275091A
Автор: SUN BOYU, ZHAO JIBIN, QIAO HONGCHAO, LU YING
Принадлежит:

The invention discloses a laser-induced shock wave high-precision forming method, and belongs to the technical field of laser shock forming. The method comprises the following steps: (1) determining the material and size of a part and the structural size after forming; (2) drawing a three-dimensional model of the part, determining a laser shock forming machining scheme, and adjusting technological parameters to enable the size of the formed structure to meet requirements; (3) determining a processing track of the first processing area by using track planning software, and impacting the first impact area according to the determined processing scheme and processing track; (4) scanning the part after the first area is impacted, calculating the structural size, and re-drawing a three-dimensional model of the part; (5) determining a machining track of a second impact area according to the newly drawn part three-dimensional model, and impacting the second impact area according to the determined ...

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Номер записи: 1
14-07-2023 дата публикации

Method for improving and optimizing mechanical properties of laser deposited Al-Mg-Sc-Zr alloy

Номер: CN116426780A
Автор: ZHAO JIBIN, ZHAO YUHUI, ZOU JIAN, HE ZHENFENG, WANG ZHIGUO, HE CHEN
Принадлежит:

The invention discloses a method for improving and optimizing the mechanical property of a laser deposited Al-Mg-Sc-Zr alloy, and belongs to the technical field of aluminum alloy deposition forming control. In the forming process, forming is controlled through circulating water cooling and a substrate heating system. According to the system, the temperature of the substrate can be uniformly reduced by monitoring and controlling the temperature of the substrate in real time. By setting a correct substrate preheating temperature threshold value, a heating system and a cooling system operate alternately, it is guaranteed that heat accumulation in the deposition forming process is effectively reduced, and it is guaranteed that the error of interlayer temperature in the deposition forming process is controlled within a small range through strict temperature control. Therefore, the whole deposition process is within a preset temperature range, a double-peak structure is adjusted, columnar crystals ...

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Номер записи: 2
11-07-2023 дата публикации

Laser deposition connection process for powder laying state aluminum alloy complex component

Номер: CN116408461A
Автор: ZHAO YUHUI, ZHAO JIBIN, FU JIKANG, WANG ZHIGUO, HE ZHENFENG, HE CHEN
Принадлежит:

The invention discloses a laser deposition connection process for a powder laying state aluminum alloy complex component, and belongs to the technical field of aluminum alloy laser additive manufacturing. The process comprises the following steps: firstly, determining the proposed parameter range of laser power, powder feeding rate and scanning rate according to the actual condition of adopted laser additive equipment; then selecting a plurality of parameter values in a proposed parameter range for combination, and selecting a groove angle and a truncated edge for experimental testing; after the test, the technological parameters which have no obvious cracks on the appearance of a connection area after laser deposition connection, have few air holes, are uniform and fine in microscopic structure and have the highest hardness and tensile strength are selected as the optimal technological parameters. According to the method, the laser power, the powder feeding rate and the scanning rate are ...

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Номер записи: 3
02-06-2023 дата публикации

Mirror surface body surface three-dimensional measurement method based on parametric curved surface

Номер: CN116202444A
Автор: FU SHENGPENG, XIA RENBO, ZHAO JIBIN, YU YANFENG
Принадлежит:

The invention relates to a mirror surface body surface three-dimensional measurement method based on a parametric curved surface. The method comprises the following steps: performing parameter calibration on a measuring device consisting of a camera and a display to obtain a conversion relation between coordinate systems of the camera and the display; using the calibration plate to replace the mirror surface to be measured, and initializing the curved surface where the calibration plate is located; the method comprises the following steps: projecting coded stripes by using a display, shooting images of all stripes by a camera through mirror reflection, and decoding the images to obtain unique coded values of image points; generating a simulated incident ray from the original point of the camera through an image point on the image plane, and calculating an intersection point of the ray reflected by the parametric curved surface and the display; parameters of the curved surface are adjusted ...

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Номер записи: 4
23-06-2023 дата публикации

Calibration method for external parameters of camera using plane mirror and with reference object not in view of camera

Номер: CN116309853A
Автор: FU SHENGPENG, XIA RENBO, ZHAO JIBIN, YU YANFENG
Принадлежит:

The invention relates to a method for calibrating external parameters of a camera when a reference object using a plane mirror is not in the view field of the camera. The method comprises the following steps: fixing positions of a camera and a reference object, and placing a plane mirror in a view of the camera so that the camera can obtain an image of the reference object through reflection of the plane mirror; adjusting the pose of the plane mirror for multiple times, and shooting at least five images by using a camera; performing image processing to obtain image coordinate values of the feature points on the reference object; determining a coordinate system of the reference object by using the image coordinates and the spatial coordinate values of the feature points; and finally, performing a series of operations according to the orthogonal constraint relationship between the object point and the image point to obtain the pose conversion relationship between the reference object coordinate ...

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Номер записи: 5
28-07-2023 дата публикации

Complex curved surface self-adaptive coating abrasive belt grinding system and grinding method

Номер: CN116494090A
Автор: ZHAO JIBIN, ZHU GUANG, CAI MING, LI LUN, LIU DIANHAI
Принадлежит:

The invention discloses a complex curved surface self-adaptive coating abrasive belt grinding system and method, and belongs to the technical field of complex curved surface grinding. In the system, a motor shaft drives a driving wheel to rotate and drives an abrasive belt to pull the whole wheel train. The contact wheel guide mechanism collects force information on the two sides of the contact wheel through a force sensor and analyzes the attaching condition of the abrasive belt and the machining surface, the pneumatic device controls an air cylinder to adjust the included angle between the contact wheel and the machining surface, and it is guaranteed that the abrasive belt is tightly attached to the machining surface. The contact wheel installation adjusting mechanism can conveniently replace and install the contact wheel. The tensioning force needs to be adjusted through cooperative work of a tensioning force sensing mechanism and a tensioning force adjusting mechanism, the tensioning ...

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Номер записи: 6
11-07-2023 дата публикации

Laser deposition forming and repairing process of Al-Mg-Sc-Zr high-strength aluminum alloy

Номер: CN116408460A
Автор: ZHAO YUHUI, ZHAO JIBIN, ZOU JIAN, HE ZHENFENG, WANG ZHIGUO, HE CHEN
Принадлежит:

The invention discloses a laser deposition forming and repairing process of Al-Mg-Sc-Zr high-strength aluminum alloy, and belongs to the technical field of high-strength aluminum alloy laser additive manufacturing. The process comprises the following steps: firstly, determining parameter ranges of laser power, powder feeding rate and scanning rate according to actual conditions of used laser additive equipment; then selecting a plurality of groups of parameters in the range for matching and combination, and selecting a defocusing amount, a scanning mode and a laser incidence deflection angle for experimental testing; after the test, the deposition sample has no obvious air holes in appearance and no collapse defect, crystal grains in a microscopic structure are uniformly distributed and small in size, and the process parameters corresponding to the sample with the overall mechanical property similar to or higher than that of the raw material wrought aluminum are the optimal process parameters ...

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Номер записи: 7
19-05-2023 дата публикации

Prediction method for square light spot laser shock peening effect

Номер: CN116136440A
Автор: SUN BOYU, ZHAO JIBIN, QIAO HONGCHAO, LU YING
Принадлежит:

The invention discloses a square light spot laser shock peening effect prediction method, and belongs to the technical field of laser shock peening. The method comprises the following steps: (1) measuring the surface appearance of a pit after laser shock peening by adopting a white light interferometer, wherein the measurement range is 1.25-1.75 times of the size of a laser spot; (2) determining the top width d1 and the bottom width d2 of the pit according to the contour of the pit, and obtaining the length d2 of the middle flat top part of the pit and the length (d1-d2)/2 of the edge attenuation part of the pit; (3) calculating a shock wave pressure peak value according to a Fabbro model; and (4) establishing a square light spot induced shock wave pressure space distribution model. According to the method, the strengthening effect after laser shock can be accurately predicted.

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Номер записи: 8
14-07-2023 дата публикации

Metal additive defect quantification method based on eddy current signal image

Номер: CN116429875A
Автор: ZHAO YUHUI, ZHAO JIBIN, LI MINGYUE, HE ZHENFENG, WANG ZHIGUO, HE CHEN
Принадлежит:

The invention discloses a defect quantification method based on an eddy current signal image, and belongs to the technical field of eddy current nondestructive testing. The method comprises the following steps: (S1) carrying out eddy current nondestructive testing on a detected object, extracting an impedance image of the detected object, and carrying out acquired data processing to obtain gain changes in X and Y directions; (S2) carrying out finite element analysis on the three-dimensional model of the measured object by adopting ANSYSMaxwell finite element electromagnetic simulation software, and changing the depth and width of the surface defect of the test block to obtain the change amplitude of the simulated electromagnetic field intensity; and (S3) carrying out image feature analysis on the eddy current nondestructive testing image, and realizing quantitative analysis on the metal additive defect by combining the intensity change of the simulated electromagnetic field. According to ...

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Номер записи: 9
11-07-2023 дата публикации

Eddy current detection simulation analysis method for defect detection of metal additive manufacturing part

Номер: CN116415362A
Автор: ZHAO JIBIN, ZHAO YUHUI, LI MINGYUE, HE ZHENFENG, WANG ZHIGUO, HE CHEN
Принадлежит:

The invention discloses an eddy current detection simulation analysis method for defect detection of titanium alloy metal additive manufacturing parts, and belongs to the technical field of eddy current nondestructive detection. According to the method, ANSYS Maxwell electromagnetic simulation software is used for carrying out finite element analysis on a three-dimensional model, the excitation frequency and lift-off amount of a detection coil and the depth, width and length of surface defects of a test block are changed, the change of electromagnetic field intensity and the change of eddy current density are obtained, and the eddy current detection simulation analysis method for detecting the defects of the titanium alloy metal additive manufacturing part is formed. According to the method, eddy current detection is adopted, a coupling agent is not needed, non-contact measurement can be achieved, sensitivity is high, and the method is suitable for nondestructive detection of micro-cracks ...

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Номер записи: 10
11-07-2023 дата публикации

Method for controlling pores and defects in laser deposition connection area of powder-spreading-state aluminum alloy complex component

Номер: CN116411271A
Автор: ZHAO YUHUI, ZHAO JIBIN, FU JIKANG, WANG ZHIGUO, HE ZHENFENG, HE CHEN
Принадлежит:

The invention discloses a method for controlling pores and defects in a laser deposition connection area of a powder-spreading-state aluminum alloy complex component, and belongs to the technical field of defect control of aluminum alloy laser connection. The method is carried out by adopting a preheating device, and the preheating device is composed of a temperature monitor, a part clamp, a K-type thermocouple, a stainless steel plate and other key components. The preheating device can uniformly heat a base material to a set temperature value, and can monitor the real-time temperature of the base material. The optimal preheating temperature value of the base material is tested through the preheating device, so that the structure is refined, pores and defects in a connecting area are reduced, and the microhardness and the tensile strength are remarkably improved. The defect control method has a great application prospect in the aspect of laser deposition connection of the powder spreading ...

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Номер записи: 11
25-04-2023 дата публикации

Surface integrity control method for laser additive manufacturing of large-size mirror mold

Номер: CN116000311A
Автор: WANG ZHIGUO, ZHAO YUHUI, ZHAO JIBIN, HE ZHENFENG, HE CHEN, ZHANG WENDONG, ZHANG HONGWEI, TANG GUANGQUAN
Принадлежит:

The invention discloses a surface integrity control method for a laser additive manufacturing large-size mirror mold, and belongs to the technical field of additive manufacturing. According to the method, martensitic stainless steel powder is adopted as a profile area material, firstly, layer-by-layer laser additive manufacturing is carried out through a synchronous powder feeding additive process, and primary interlayer remelting is carried out between adjacent layers through a laser surface remelting process; after laser additive manufacturing, roughly machining the surface of the part after additive manufacturing by adopting a numerical control milling or grinding process; integrally remelting the roughly-machined sample by adopting a laser surface remelting process; and after integral remelting, carrying out surface precision machining on the surface of the sample by adopting a grinding and polishing process. According to the method, the surface roughness of the molded surface can be ...

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Номер записи: 12
30-05-2023 дата публикации

Laser shock peening method for nickel-based precipitation-hardening single-crystal high-temperature alloy

Номер: CN116179801A
Автор: ZHAO JIBIN, LU YING, QIAO HONGCHAO, SUN BOYU, HU XIANLIANG
Принадлежит:

The invention discloses a laser shock peening method for a nickel-based precipitation-hardening single-crystal high-temperature alloy, and belongs to the technical field of single-crystal high-temperature alloys. The method comprises the following steps: coating an absorption layer and applying a restraint layer on the surface of a sample; then, a laser beam with the laser wavelength of 532 nm or 1064 nm, the pulse width of 5-20 ns, the laser energy of 2-10 J and the light spot diameter of 0.5-3 mm is used for conducting pre-impact treatment and impact treatment on the surface of the sample; and finally, removing the absorption layer. Round pits are formed in the surface of the nickel-based precipitation-hardening type single-crystal high-temperature alloy sample treated through the method, the microhardness HV of an impact area can be increased to 510 from 398 of a matrix to the maximum, the surface residual compressive stress can be increased to 942 MPa from 497 MPa of the matrix to the ...

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Номер записи: 13
25-04-2023 дата публикации

Design method of interface buffer layer for laser cladding of high-hardness martensitic steel on surface of alloy steel

Номер: CN116011166A
Автор: ZHAO JIBIN, WANG ZHIGUO, ZHAO YUHUI, HE ZHENFENG, HE CHEN, ZHANG WENDONG, ZHANG HONGWEI, TANG GUANGQUAN
Принадлежит:

The invention discloses an interface buffer layer design method for laser cladding of high-hardness martensitic steel on the surface of alloy steel, and belongs to the technical field of laser surface machining. According to the method, the thickness of a component transition area T0 is reduced or increased according to specific service conditions of parts, so that an interface buffer layer finally formed between alloy steel and a cladding layer meets service requirements; the design method comprises the following steps: (1) according to an interface buffer layer design criterion, the thickness of an interface buffer layer (the thickness of a relatively long interface gradient buffer layer or a control buffer layer) needs to be designed based on a bearing behavior and a surface service behavior in a service process of a whole part (comprising a base body, a buffer layer and a surface cladding layer); meanwhile, the thickness of the interface buffer layer is selected according to the thickness ...

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Номер записи: 14