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JSD220型变速器后盖铸件裂纹缺陷分析与改进
Analysis and Improvement of Crack Defect of JSD220 Transmission Rear Cover Casting
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- DOI:
- 作者:
- 刘德旺 葛赛赛
LIU Dewang;GE Saisai
- 作者单位:
- 陕西法士特汽车传动集团有限责任公司铸造分公司
Foundry Branch,Shaanxi Faust Automobile Transmission Group Co.,Ltd.,Baoji 722409,China
- 关键词:
- 压铸件结构强度 加强筋 有限元分析
die casting structural strength rib plate finite element analysis
- 摘要:
- JSD220型变速器在服役过程中后盖铸件会出现裂纹,甚至开裂现象,最终导致变速器功能失效。针对这个问题,从材料的化学成分、力学性能、金相组织以及断口的铸造缺陷等方面综合分析,排除以上相关因素。运用有限元方法对该产品的结构设计更改前、后的结构强度做了对比分析,优化了铸件结构设计。结果表明,改进后的后盖铸件整体强度明显提升,得到了市场实际批量验证,基本消除了JSD220型变速器后盖铸件因裂纹导致的失效现象。工艺改进后,后盖铸件装机服役效果良好。
During the service of JSD220 transmission rear cover casting will crack or even crack,resulting in the transmission function failure.In order to solve this problem,the chemical composition,mechanical properties,metallographic structure and casting defects of the fracture were analyzed comprehensively,and the above related factors were excluded.The structural strength before and after the structural design of the product was compared and analyzed by finite element method,and the structural design of the casting was optimized.The results show that the overall strength of the improved rear cover castings has been significantly improved,which has been verified by the actual batch in the market,and the failure phenomenon caused by cracks in JSD220 transmission rear cover castings has been basically eliminated.After process improvement,the service effect of rear cover casting machine is better.