Info

Title:

Thermal behavior analysis of thin-walled cylinder structure during forming process based on SLM

Author(s):

Author DU Shihao; GAO Xueqiang; LIU Zhao; DING Chenyang; HAN Zhijie

College of Mechanical Engineering， Hebei University of Science and Technology， Shijiazhuang 050018, China

Keywords:

SLM;  Thin-walled cylinder;  High strength aluminum alloy;  Scanning strategy;  Transient temperature field

CLC:

PACS:

V261.8

DOI:

-

DocumentCode:

Abstract:

Considering the difference between thin-walled cylinder and flat structure in SLM forming process, this paper established a multi-layer and multi-channel temperature field finite element model of thin-walled cylinder formed by SLM based on ANSYS, and used numerical simulation to study the influence of scanning strategy on temperature field and stress field of thin-walled cylinder model. The dynamic growth process of Al7075 metal powder was described with the technique of "cell life and death", and the distribution of transient temperature field and stress field were obtained. The results show that when the length of single channel is sufficient, the formed part of laser has enough time to dissipate heat, and the temperature field advantage of different scanning strategies becomes weak. The stress advantage brought by different scanning strategies still exists, even when the temperature advantage becomes weak, a reasonable scanning strategy can still effectively improve the stress state of the printed part. This paper provides an important reference for thermal behavior analysis of thin-walled cylindrical models during molding.