Metal 3D printer based on interlayer shock processing process and printing method thereof

A 3D printer and impact strengthening technology, applied in the field of impact strengthening, can solve problems such as porosity and holes, and achieve the effect of improving density

Inactive Publication Date: 2014-06-18
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] In order to solve the technical problems of defects such as holes and porosity generated inside the formed parts during the existing metal 3D printing proces

Method used

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  • Metal 3D printer based on interlayer shock processing process and printing method thereof
  • Metal 3D printer based on interlayer shock processing process and printing method thereof

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Embodiment Construction

[0029] Such as figure 1 As shown, the metal 3D printer based on the interlayer impact strengthening process of the present invention includes a cladding nozzle 9, a strengthening nozzle 10, and a laser focusing head integrated with the cladding nozzle. The strengthening nozzle 10 performs impact strengthening on the cladding layer 3 formed by the cladding nozzle 9. The strengthening nozzle is a laser shock strengthening nozzle and / or a mechanical shot peening strengthening nozzle, and the angle range between the center line of the strengthening nozzle and the cladding layer is 30°- 60°.

[0030] There are five kinds of mutual cooperation structures between the strengthening nozzle and the cladding nozzle in the present invention: the first one is that the cladding nozzle is arranged in the center, and the strengthening nozzle is arranged on the periphery of the cladding nozzle, and the strengthening nozzle includes 3-5 nozzles , each nozzle can be controlled by the electrical...

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Abstract

The invention discloses a technique for improving the mechanical performance of a printed piece through shock processing in the process of metal part 3D printing. The technique is characterized in that shock processing is conducted on the upper surfaces of cladding layers after a certain number of layers are cladded, so that defects such as cavities, looseness and microcracks in the cladding layers are eliminated, and the density of a formed part is improved; in the shock processing process, heating and reasonable partitioned technology planning are conducted on the cladding layers, the shock processing angle can be changed according to different areas on the same layer and the change of the number of the layers, and therefore it is guaranteed that the density and the mechanical performance are improved, stress concentration is prevented, and the forming precision of the metal 3D printed part is ensured.

Description

technical field [0001] The invention relates to an impact strengthening method facing cladding layers in the 3D printing process of metal parts. Using this method, a reasonable impact process can be adopted according to the different characteristics of the cladding layer, so as to eliminate the internal defects of the cladding layer, refine the grains and increase the residual compressive stress inside the cladding layer, and finally increase the mechanical properties of the metal parts, especially at high temperature. Fatigue mechanical properties. technical background [0002] Metal 3D printing technology is an advanced manufacturing technology that can directly form metal parts with complex structures and excellent mechanical properties through the accumulation of points, lines, and surfaces. However, the working principle of point-by-point accumulation forming in the forming process leads to almost inevitable defects such as holes and porosity inside the formed part, an...

Claims

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Application Information

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IPC IPC(8): B22F3/16
Inventor 贺斌赵卫杨小君江浩李睿
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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