Method used for improving manufacturing efficiency and precision of additive formed through powder bed fusion

An additive manufacturing and melting molding technology, applied in the field of additive manufacturing, can solve the problems of poor molding efficiency, molding accuracy, over-burning, and low molding accuracy and molding efficiency.

Inactive Publication Date: 2017-02-15
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the heat source energy and spot diameter are large, the molding efficiency is high but the molding accuracy is poor, and there may be defects such as overburning; when ...

Method used

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  • Method used for improving manufacturing efficiency and precision of additive formed through powder bed fusion
  • Method used for improving manufacturing efficiency and precision of additive formed through powder bed fusion
  • Method used for improving manufacturing efficiency and precision of additive formed through powder bed fusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] When forming a specific layer of a product, use a heat source such as a laser or an electron beam with a smaller energy and spot diameter to scan the contour, and use a heat source such as a laser or an electron beam with a larger energy and spot diameter to scan the layer, such as figure 1 shown.

Embodiment 2

[0019] In a specific layer of a product, the minimum size of a certain area of ​​the layer is smaller than the spot diameter of a heat source with a larger spot diameter, and the area is scanned by a heat source such as a laser or an electron beam with a smaller energy and spot diameter, such as figure 2 shown.

Embodiment 3

[0021] When molding a product, the two layers of powder bed near the upper surface are all scanned by heat sources such as lasers or electron beams with small energy and spot diameters, such as image 3 shown.

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PUM

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Abstract

The invention discloses a method used for improving the forming efficiency and precision of the manufacturing technology for forming an additive through SLS, SLM, SEBM and the like on the basis of powder bed fusion. The method is characterized in that in the same technology process, at least two kinds of laser beams or electron beams or other else with different energy parameters, different light spot size parameters and the like are adopted as heat sources of a fusion power bed for scanning. The heat source with low energy and the small light spot diameter is used for scanning the outline and the small area, and the heat source with the high energy and the large light spot diameter is used for conducting filling scanning on the large inner area. The heat source with the low energy and the small light spot diameter is used for conducting outline and filling scanning on a surface layer or several layers adjacent to the surface.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a method for improving molding efficiency and precision based on powder bed fusion molding additive manufacturing technology. Background technique [0002] Additive Manufacturing (AM for short) is an advanced manufacturing technology that integrates digital design and manufacturing technology, material technology, and information technology. AM adopts the parts forming method of layered manufacturing and overlay molding. When using AM to make parts, first use computer-aided design (Computer Aided Design, referred to as CAD) to make digital models of parts, and then perform layered slice processing on the obtained digital models, and finally manufacture layer by layer according to the layered slice information. Overlay molding. The AM process has a high degree of digitalization, can be used for a wide range of molding materials and can shape products with complex ...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y30/00
CPCB22F3/003B33Y30/00B22F10/00B22F12/45B22F10/366B22F10/28Y02P10/25
Inventor 殷国富向召伟殷鸣江卫锋梅筱琴邓珍波
Owner SICHUAN UNIV
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