Full-laser hybrid additive manufacturing method and device

A kind of additive manufacturing and laser technology, which is applied in the direction of lasers, manufacturing tools, additive processing, etc., can solve the problem of micro-channel powder residue and achieve high-precision results

Active Publication Date: 2017-03-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to one aspect of the present application, an all-laser composite additive manufacturing method is provided. On the basis of laser selective melting (SLM), laser precision packaging is used to solve the problem of forming microchannels inside materials, especially overhanging surfaces. , solve the problem of microchannel powder residue, and meet the requirements of high precision, high finish and high cleanliness in the processing of key aerospace parts

Method used

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  • Full-laser hybrid additive manufacturing method and device
  • Full-laser hybrid additive manufacturing method and device
  • Full-laser hybrid additive manufacturing method and device

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Embodiment 1

[0054] Preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. The manufacturing process of the all-laser composite additive manufacturing device of the present application is as follows: figure 1 shown, where:

[0055] Step S1, laser selective melting (SLM): 3D printing and forming of complex structural parts by infrared laser;

[0056] Step S2, laser micro-removal processing: using ultra-fast laser (femtosecond, picosecond), process the groove structure on the 3D printing formed part in step S1, and perform laser polishing and finishing processing on the surface of the groove structure, Improve the smoothness of the wall and bottom surfaces;

[0057] Step S3, laser precision packaging: place the metal sheet above the groove structure formed in step S2, and use infrared laser to weld the position where the metal sheet is in contact with the groove structure for precise packaging, so that the metal sheet i...

Embodiment 2

[0060] Preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. The primary microchannel processing flow of the manufacturing process of the all-laser composite additive manufacturing device of the present application is as follows: figure 2 As shown, specifically:

[0061] After the powder coating system completes the metal powder coating, the 1064nm infrared continuous wave laser performs SLM molding of the metal powder.

[0062] Then, with the assistance of a distance meter and a CCD vision system (CCD detector), a 532nm picosecond green laser is used to process a groove structure on the formed part, and the surface of the groove structure is laser polished and finished to improve The finish of the walls and floors.

[0063] The micro-manipulator is a set of automatic grabbing, placing, and pressure-applying devices, which grab, place, and apply welding pressure to thin-walled materials.

[0064] The...

Embodiment 3

[0068] Preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0069] image 3 It is a schematic structural diagram of an all-laser composite additive manufacturing device according to an embodiment of the present application, as shown in image 3 As shown, the device includes: a laser unit 2, a control unit 4 and a molding unit 6, the laser unit 2 is connected to the molding unit 6 in an optical path, and the control unit 4 is connected to the laser unit 2 and the molding unit respectively. Part 6 is electrically connected.

[0070] The laser unit 2 includes a laser 20 and a laser 22 . The laser 20 is a continuous wave laser, and the laser 22 is a short pulse laser.

[0071] The forming part 6 includes a welding part 68 , the welding part 68 is controlled by the control part 4 and cooperates with the laser part 2 .

[0072] The laser 20 additively manufactures the product substrate at the bottom of ...

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Abstract

The invention discloses a full-laser hybrid additive manufacturing method. Based on select laser melting, a laser precise packaging method is adopted to solve the problem of forming of an overhung surface and solve the problem that powder remains on micro-channels, and therefore the requirements for high precision, high finish degree and high cleanness degree of machining of aerospace key parts are met. According to the full-laser hybrid additive manufacturing method, after a matrix is obtained through select laser melting forming, subtractive forming is conducted on the matrix through pulse laser, so that a cavity is formed, packaging is conducted on the laser, and then a formed material provided with an inner cavity structure is obtained. The invention discloses a device applied to the full-laser hybrid additive manufacturing method. The device comprises a laser portion, a control portion and a forming portion. The laser portion is in light path connection with the forming portion. The control portion is electrically connected with the laser portion and the forming portion. The laser portion comprises a first laser light source and a second laser light source. The forming portion comprises a welding portion. The welding portion is in cooperation with the laser portion to conduct additive manufacturing in the manner that the welding portion is controlled by the control portion.

Description

technical field [0001] The application relates to a material laser processing method, which belongs to the field of material processing. Background technique [0002] Selective laser melting technology (Select Laser Melting) can realize the forming of complex structural parts, but the forming precision is low, the surface finish is poor, and the resolution is low. Generally, follow-up processing is required to improve the surface finish. There are generally two methods for subsequent processing. One is to introduce machine-added and subtractive materials in additive manufacturing. This method can improve the macro-scale finish, but the reliability and durability of the tool are poor, and the resolution is low, especially for the processing capability of micro-channels. Insufficient; the other is to introduce ultrafast laser material reduction technology into laser additive manufacturing, which can realize the precise forming and processing of microchannels in complex inner c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/342
CPCB23K26/342B33Y40/00B33Y70/00B23K26/0624B23K26/364B23K26/26B23K26/0608Y02P10/25B33Y10/00B33Y30/00B23K26/0821B23K26/0643H01S3/067B23Q17/2471B23K26/032B23K20/008B23K26/362
Inventor 张文武焦俊科
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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