Analysis and Optimization of Crack Defect in Die Casting Aluminum Alloy Shell of Motor Controller Unit
Author of the article:SHEN Dingjian;LU Gang;CHEN Jianming;MAO Hongfeng
Author's Workplace：Zhuzhou CRRC Times Electric Co.,Ltd.,Z huzhou 412001,China
Key Words：die casting aluminium alloy fracture failure demold process MCU
Abstract：In order to meet the lightweight requirements of new energy vehicles,motor control unit(MCU)shell usually adopts aluminum alloy die casting,and casting crack is the common defects.Aiming at the crack defects of the MCU shell,failure reasons were analyzed from chemical composition,microstructure,mechanical properties,mold flow,demultifying process and other aspects.The results show that the driving force of the ejector rod is the main cause of the crack.The position of ejector rod is optimized,and the simulation and test show that the optimized position of ejector rod can effectively avoid the generation of die casting crack.
