中国激光, 2016, 43 (12): 1202003, 网络出版: 2016-12-09
分区扫描路径规划及其对SLM成型件残余应力分布的影响 下载: 761次
Planning of Area-Partition Scanning Path and Its Effect on Residual Stress of SLM Molding Parts
激光技术 分区扫描 激光选区熔化 残余应力分布 力学性能 laser technique area-partition scanning selective laser melting residual stress distribution mechanical property
摘要
为了解决激光选区熔化成型零件时扫描线过长导致的层内累积残余应力过大、易发生翘曲变形和裂纹等问题,提出了一种分区扫描策略。采用S形正交扫描策略和分区扫描策略分别规划了零件扫描路径,实验验证了分区扫描策略的有效性。实验结果表明,采用分区扫描策略能有效降低边界拉应力,减小平面残余应力波动,提高成型件的力学性能。
Abstract
In order to solve such problems as residual stress accumulated within layers being excessive, and warpage and cracks being easy to occur as a result of the long scanning line when selective laser melting is used to mold parts, one scheme of area-partition scanning is proposed. The S-shaped orthogonal layer cross scanning strategy and area-partition scanning strategy are respectively adopted to plan scanning path and the validity of the latter strategy is experimentally confirmed. The experimental results indicate that, with the area-partition scanning strategy, the tensile stress at rims of molding parts is effectively reduced, the fluctuation of residual stress at surface is weakened, and the mechanical property of molding parts is improved.
邓诗诗, 杨永强, 李阳, 王迪, 王安民, 宋长辉. 分区扫描路径规划及其对SLM成型件残余应力分布的影响[J]. 中国激光, 2016, 43(12): 1202003. Deng Shishi, Yang Yongqiang, Li Yang, Wang Di, Wang Anmin, Song Changhui. Planning of Area-Partition Scanning Path and Its Effect on Residual Stress of SLM Molding Parts[J]. Chinese Journal of Lasers, 2016, 43(12): 1202003.