Sidewall precision analysis of metal part formed by selective laser melting

WU Wei-hui; YANG Yong-qiang; MAO Xing; WANG Di; MAO Gui-sheng

doi:10.3788/OPE.20152313.0164

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Sidewall precision analysis of metal part formed by selective laser melting

更新时间：2020-08-13

- Sidewall precision analysis of metal part formed by selective laser melting
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 165-172(2015)
- 作者机构：
  
  1. 韶关学院物理与机电工程学院,广东韶关,中国,512005
  2. 华南理工大学机械与汽车工程学院,广东广州,中国,510640
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0164
  CLC： TH161;TG665
- Received：20 May 2015，
  
  Revised：19 June 2015，
  
  Published：14 November 2015
- 稿件说明：
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吴伟辉, 杨永强, 毛星等. 激光选区熔化增材制造零件侧壁成型精度分析[J]. 光学精密工程, 2015,23(10z): 165-172

WU Wei-hui, YANG Yong-qiang, MAO Xing etc. Sidewall precision analysis of metal part formed by selective laser melting[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 165-172
吴伟辉, 杨永强, 毛星等. 激光选区熔化增材制造零件侧壁成型精度分析[J]. 光学精密工程, 2015,23(10z): 165-172 DOI： 10.3788/OPE.20152313.0164.

WU Wei-hui, YANG Yong-qiang, MAO Xing etc. Sidewall precision analysis of metal part formed by selective laser melting[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 165-172 DOI： 10.3788/OPE.20152313.0164.

摘要

为提高增材制造金属零件时侧壁的成型精度

开展了提高激光选区熔化增材制造零件侧壁精度的工艺研究。结合实验分析了影响侧壁精度的粉末黏附、熔池端部凸起、热变形等现象

针对不同类型的侧壁提出了相应的侧壁精度优化方案。提出采用变向螺旋勾边+内缩填充扫描策略

同时在勾边时保持稍低的扫描速度

可以提高垂直及法向朝上侧壁的成型精度;法向朝下侧壁精度受热应力的影响最大

合理的扫描策略及支撑设计可有效防止该类侧壁热变形。根据工艺分析结果

成功成型了一个带有多种类型侧壁的金属零件。结果表明

采用上述工艺方案可以直接成型出尺寸精度最高可达到±0.05 mm/10 mm

表面粗糙度最高可达到

为26.7 μm的金属零件。

Abstract

To improve the precision of side wall forming in additive manufacturing of metal parts

a process method was explored in selective laser melting of metal parts. Some phenomena effecting on sidewall precision like powder adhesion

molten pool-end bulge

and thermal deformation were analyzed and corresponding process methods to obviously improve the precision were proposed for different sidewall types. It points out that the precisions of vertical sidewall and sidewall with upward normal can be improved distinctly by using the alternating direction spiral edge-scanning plus inside-filling scanning strategy and maintaining a lower edge-scanning speed. The precision of sidewall with downward normal is strongly affected by thermal stress

but this kind of thermal deformation can be avoided through the appropriate design of scanning strategy and sidewall support. According to process analysis

a metal part with different types of sidewalls was manufactured using selective laser melting technology. Test results show that the size precision of this part reaches ±0.05 mm/10 mm and the surface roughness

is 26.7 μm.

关键词

Keywords

references

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Related Institution

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