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铝合金电控壳体压铸件裂纹缺陷分析与优化
Analysis and Optimization of Crack Defect in Die Casting Aluminum Alloy Shell of Motor Controller Unit
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- DOI:
- 作者:
- 沈丁建 卢钢 陈建明 毛鸿锋
SHEN Dingjian;LU Gang;CHEN Jianming;MAO Hongfeng
- 作者单位:
- 株洲中车时代电气股份有限公司
Zhuzhou CRRC Times Electric Co.,Ltd.,Z huzhou 412001,China
- 关键词:
- 压铸铝合金 裂纹缺陷 脱模过程 电机控制器
die casting aluminium alloy fracture failure demold process MCU
- 摘要:
- 为满足新能源汽车轻量化的要求,电机控制器壳体通常采用铝合金压铸件,而铸件裂纹是其常见的缺陷形式。针对某电控壳体的裂纹缺陷,从化学成分、显微组织、力学性能、模流、脱模过程等方面进行失效原因分析。结果表明,脱模过程中的顶杆作用力是导致裂纹产生的主要原因。对顶杆位置进行优化,并进行仿真和试验验证,优化后的顶杆位置可以有效避免压铸裂纹的产生。
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.