Research On the Residual Stress of GGV30 Clutch Pressure Plate Casting

Author of the article:SONG Jinlin1 , LIU Lanjun1 , HONG Jun2 , ZHANG Liang2

Author's Workplace：1. Department of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Haili Precision Casting Co., Ltd., Hanshan 238100, China

Key Words：pressure plate casting; thermal physical parameters; pouring temperature; residual stress; numerical simulation

Abstract：Thermal physical parameters play a very important role in accurately simulating the macroscopic defects and residual stresses of castings through finite element simulation software. In this paper, the GGV30 clutch pressure plate casting produced by a certain enterprise was taken as the specific research object, with ProCAST and JMatPro software used to calculate its thermal physical parameters. By referring to the literature and comparing experiments, it is found that the thermal physical parameters calculated by JMatPro software are closer to the actual pressure plate casting level. Then, the thermal physical properties of the pressure plate calculated by JMatPro software were imported into ProCAST software. Aiming at the original pouring system of the enterprise, the temperature field and stress field in the casting process of the pressure plate were numerically simulated at four different pouring temperatures. The results show that pouring temperature has different effects on the temperature field distribution and cooling rate in different regions of the pressure plate, resulting in different effects on residual stress in different regions. The increase in pouring temperature is beneficial to reduce the residual stress of the small lug, inner ring and part of the pressure plate surface, but the effect is relatively small. For the large lug area, the residual stress increases obviously with increasing pouring temperature.