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Laser 3D printing method for metal workpiece and system thereof

A 3D printing and metal workpiece technology, applied in the field of 3D printing, can solve the problem of low density of metal workpieces, and achieve the effect of improving the density

Pending Publication Date: 2017-10-17
INNO LASER TECH CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a laser 3D printing method and system for metal workpieces, which solves the technical problem of low density of existing 3D printed metal workpieces

Method used

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  • Laser 3D printing method for metal workpiece and system thereof
  • Laser 3D printing method for metal workpiece and system thereof

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Embodiment Construction

[0021] The present invention will be further elaborated below with reference to the accompanying drawings.

[0022] Please refer to the attached figure 1 , in this example, please refer to figure 1 , the laser 3D printing system for metal workpieces in this embodiment mainly includes an industrial computer 10, a laser scanning device 20 and a metal pool device 30. The industrial computer 10 controls the laser scanning device 20 to perform 3D printing on the metal powder placed in the metal pool device 30 .

[0023] Wherein, the industrial computer 10 is connected with the laser scanning device 20 and the metal pool device 30, and controls the laser scanning device 20 and the metal pool device 30.

[0024] Further, the above-mentioned laser scanning device 20 includes: a laser 21 connected to the industrial computer 10 and adjusting the pulse width according to the control of the industrial computer 10, a beam expander 22 connected to the laser 21, and a beam expander 22 conn...

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Abstract

The invention discloses a laser 3D printing method for a metal workpiece and a system thereof. The laser 3D printing method for the metal workpiece comprises the following steps that first, 3D sintering is conducted on metal powder through continuous laser or pulsed laser; second, laser-induced shock wave impact is conducted on the 3D sintered workpiece through short-pulse-width laser; and third, polishing treatment is conducted on the 3D sintered workpiece through continuous laser or pulsed laser. When the printed object contains different types of material powder, appropriate parameters such as the laser wave length, the pulse width and the pulse energy are chosen according to the optical characteristics of the material powder, and 3D printing of functionally-graded objects is realized through the three steps. Compared with the prior art, according to the laser 3D printing system, the laser sintering degree is controlled by changing the laser pulse width in the process of printing the metal workpiece, and the situations of porosity, over burning and spheroidization of the metal workpiece in the printing process are relieved, so that the compactness of the metal workpiece is improved.

Description

technical field [0001] The present invention relates to the technical field of 3D printing, in particular to a laser 3D printing method and system for metal workpieces. Background technique [0002] 3D printing technology is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. It can directly generate parts of any shape from computer graphics data without machining or any molds, thereby greatly shortening the product development cycle, improving productivity and reducing production costs. [0003] Laser sintering technology utilizes the principle that powder materials are sintered under laser irradiation, and is formed by computer-controlled layer-by-layer stacking. Laser sintering technology can use a lot of powder materials and make finished products of corresponding materials. The finished products of laser sintering have good precision and high strength, but the main adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/24
CPCB22F3/105B22F3/24B22F12/49B22F12/70B22F10/28B22F12/41B22F12/90B22F12/44B22F12/43B22F10/32B22F10/66B22F2998/10B22F10/77B33Y40/00B33Y40/20B22F2003/247B33Y10/00B33Y30/00Y02P10/25B33Y50/02
Inventor 赵晓杰陶沙秦国双
Owner INNO LASER TECH CORP LTD
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