关键词: 汽车减振器；底盖开裂；问题整改

Abstract: As a key part of automobile chassis, the shock absorber is cracked during driving, which seriously affects its service life. Aiming at the rear shock absorber bottom cover cracking problem of a certain model, this paper introduces the background of the problem in detail, the troubleshooting process of the problem, and confirms the state of the fault part through the disassembly of the fault part, welding strength analysis and welding penetration analysis. The failure problem of shock absorber is reproduced by bench test and the cause of the problem is obtained by computer aided engineering (CAE) force analysis. Then the rectification plan is formulated according to the stress situation of the cracking position. Finally, the effect of the improvement is verified. Through the welding strength analysis, CAE fatigue analysis, bench verification and road reliability test, the cracking problem of the shock absorber bottom cover is effectively solved and the rectification plan is quantitatively improved. This paper provides guidance for the analysis and rectification of similar auto parts cracking problems.

Key words: Automobile shock absorber; Base cap cracking; Problem rectification