| Title： | Iterative reverse deformation optimization design of castings based on numerical simulation of solidification thermal stress | |
| Author： | Yu-hao Chen1, *Dun-ming Liao1, Wei-dong Li2, Tao Chen3, Ming Yang1, and Jun-ke Shi1 | |
| Address： | 1. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Luoyang Sunrui Titanium Precision Casting Co., Ltd., Luoyang 471003, Henan, China; 3. Wuhan Chenxi Yunfeng Technology Co., Ltd., Wuhan 430074, China | |
| Key words： | casting simulation; thermal stress deformation; dimensional compensation; dimensional accuracy | |
| CLC Nmuber： | TP391.9 | |
| Document Code： | A | |
| Article ID： | 1672-6421(2022)04-342-09 | |
| Abstract： |
In the casting process, in order to compensate for the solidification shrinkage to obtain higher dimensional accuracy of the casting, it is often necessary to modify the original design of castings, and a suitable compensation method has a decisive impact on the dimensional accuracy of the actual casting. In this study, based on solidification simulation, a design method of reverse deformation is proposed, and two compensation methods, empirical compensation and direct reverse deformation, are implemented. The simulation results show that the empirical compensation method has problems such as difficulty in determining the parameters and satisfaction of both the overall and local accuracy at the same time; while based on the simulation results for each node of the casting, the direct reverse deformation design achieves the design with shape. In addition, the casting model can be optimized through iterative revisions, so that higher dimensional accuracy can be continuously obtained in the subsequent design process. Therefore, the direct reverse deformation design is more accurate and reasonable compared to empirical compensation method.
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