铸造技术2011，Vol.32Issue(3)：357-360,4.
柔性铺粉金属零件直接快速制造研究
Research on Direct Rapid Manufacturing of Metal Part based on Flexible Powder Spreading Mechanism
摘要
Abstract
In order to overcome roller collision phenomenon in direct rapid manufacturing of metal part by Selective Laser Melting(SLM) based on traditional rigid powder spreading mechanism, it is necessary to develop a new powder spreading mechanism. The SLM technology based on flexible powder spreading mechanism was studied in this paper. Working principle and characteristic of flexible powder spreading mechanism were analyzed firstly, then key designs of flexible powder spreading device were proposed. Finally, the effect of flexible powder spreading mechanism was analyzed according to a stainless steel SLM part building experiment. The results show that flexible powder spreading mechanism can avoid roller collision problem and make SLM process more stable.Wave shaped surface easily occurs during SLM processing because of the teeth marks on new powder layer which happen when flexible powder spreading device spreads a new powder layer and it is important for weakening the teeth marks on new powder layer to ensure processing quality of the last few rows of flexible powder spreading teethes. Through flexible powder spreading mechanism,metal part with high relative density can be made, and the metal part made in this study is a metallurgical bonded entity with relative density of 99.2 ％, dimensional accuracy in x-y direction of ± 0. 1 mm, in z direction of ± 0.2 mm.关键词
选区激光熔化/快速制造/柔性铺粉机制/金属零件分类
金属材料引用本文复制引用
吴伟辉,杨永强,王迪..柔性铺粉金属零件直接快速制造研究[J].铸造技术,2011,32(3):357-360,4.
