Analysis and Improvement of Crack Defect of JSD220 Transmission Rear Cover Casting
Author of the article:LIU Dewang;GE Saisai
Author's Workplace：Foundry Branch,Shaanxi Faust Automobile Transmission Group Co.,Ltd.,Baoji 722409,China
Key Words：die casting structural strength rib plate finite element analysis
Abstract：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.
