激光金属直接成形中形貌自稳定效应的研究

皮刚; 张安峰; 朱刚贤; 李涤尘; 卢秉恒

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激光金属直接成形中形貌自稳定效应的研究

更新时间：2025-07-09

- 激光金属直接成形中形貌自稳定效应的研究
- Self-Regulation-Effect in Laser Direct Metal Manufacturing
- 西安交通大学学报 2010年44卷第11期页码：77-81
- 作者机构：
  
  西安交通大学机械制造系统工程国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
  
  : 2010-04-02. 作者简介: 皮刚(1985-),男,硕士生;张安峰(联系人),男,副教授. 基金项目: 国家自然科学基金资助项目(50675171);国家重点基础研究发展规划资助项目(2007CB707704);长江学者和创新团队发展计划资助项目(IRT0646)
- DOI：
  中图分类号： TN249
- 网络首发：2010-11-10，
  
  纸质出版：2010
- 稿件说明：
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皮刚, 张安峰, 朱刚贤, 等. 激光金属直接成形中形貌自稳定效应的研究[J]. 西安交通大学学报, 2010,44(11):77-81.

Self-Regulation-Effect in Laser Direct Metal Manufacturing[J]. 2010, 44(11): 77-81.
皮刚, 张安峰, 朱刚贤, 等. 激光金属直接成形中形貌自稳定效应的研究[J]. 西安交通大学学报, 2010,44(11):77-81. DOI：

Self-Regulation-Effect in Laser Direct Metal Manufacturing[J]. 2010, 44(11): 77-81. DOI：

摘要

为了在开环控制条件下直接制备出表面平整的薄壁零件

针对同轴送粉条件下粉末离焦对单道熔覆层厚度的影响

建立了理论模型

分析了成形表面出现的凹凸不平现象

对激光离焦和粉末离焦对单道熔覆层形貌的影响进行了实验研究.研究表明

激光离焦主要影响单道熔覆层的宽度

而粉末离焦主要影响单道熔覆层的厚度.在粉末负离焦条件下

激光金属直接成形过程具有形貌自稳定效应

能消除成形层的凹凸现象

从而制造出成形表面平整的薄壁零件样件.由于计算结果与实验结果的趋势能保持一致

形貌自稳定效应能够提高开环系统下薄壁零件的制造精度

因此具有实际的应用价值.

Abstract

To fabricate fine thin-wall parts with smooth surface by open-loop laser direct metal manufacturing(LDMM)system

the uneven formed surface in forming process is analyzed and the effect of off-focused laser and off-focused powder on the shape of single-trace cladding layer

is investigated by single-trace cladding experiments. The results show that off-focused laser exerts a significant effect the thickness of single-trace cladding layer

and off-focused powder affects mainly the height of single-trace cladding layer. It is suggested that self-regulation-effect in the process of LDMM in the condition of negative off-focused powder enables to perfect the uneven shaped surface caused by instability of process parameters. The theoretical model of the influence of off-focused powder on deposition thickness in the condition of coaxial powder feeding is constructed

and regular pattern obtained from the model matches well with experimental results. Several thin-wall parts with smooth formed surface are fabricated in terms of the self-regulation-effect.

关键词

Keywords

references

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张安峰, 李涤尘, 卢秉恒. 激光直接金属快速成形技术的研究进展 [J]. 兵器材料科学与工程, 2007,30(5):68-72.

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激光偏振特性在微尺度工件激光弯曲成形中的作用. 西安交通大学学报,2009,43(7):96-100.

光固化快速成型高分辨激光液位检测系统的开发. 西安交通大学学报,2008,42(11):1394-1397.

同轴送粉喷嘴气固两相流场的数值模拟. 西安交通大学学报,2008,42(9):1169-1173.

激光照射金纳米微粒靶向细胞对细胞膜通透性的影响. 西安交通大学学报,2008,42(12):1569-1564.

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