薄壁零件的激光选区熔化成形形变控制
Stress and deformation control in selective laser melting forming of thin-walled parts
蒋倩 1冉文静 2孟凡昕 2王海涛 2权国政2
作者信息
- 1. 江苏省船舶动力系统零件先进制造工程技术研究中心,江苏 南京 211121;南京中远海运船舶设备配件有限公司,江苏 南京 211121
- 2. 重庆大学,重庆 400044
- 折叠
摘要
本文基于ANSYS有限元软件,建立了SLM成形薄壁零件的热—力耦合动态模拟模型,采用高斯面热源作为激光输入,研究了薄壁零件在典型工艺参数下的应力场和形变规律.结果显示:在选定的工艺参数下,零件的总体形变规律为外壁的形变量大于内壁,高度略有缩短,壁厚减小,但整体形状无明显畸变;分析了冷却过程中的变形机理,提出了优化冷却方式、调整零件设计尺寸等方法,以提高尺寸精度.
Abstract
Based on ANSYS finite element software, this paper establishes a thermal-mechanical coupling dy-namic simulation model for SLM forming of thin-walled parts. Gaussian surface heat source is used as laser input to study the stress field and deformation rules of thin-walled parts under typical process parameters. The results show that under selected process parameters, the overall deformation pattern of the part is that the outer wall has greater deformation than the inner wall, with a slight shortening in height, a decrease in wall thickness, but no significant distortion in the overall shape. The deformation mechanism during cooling is analyzed, and methods such as optimizing the cooling method and adjusting the part design size are proposed to improve dimensional accuracy.
关键词
薄壁零件/SLM/形变/成形精度Key words
Thin-walled parts/SLM/Deformation/Forming accuracy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据