The stabilizer rod support pin of rear axle broken down during the road test of certain vehicle.Through the analysis of material,hardness,and metallographic examination of the fault sample,combined with the results of structural stress analysis of the stabilizer rod support pin of rear axle,the manufacturing process of the parts,and the bench test to reproduce the fault,the fault was reproduced.The result shows that,the root cause of the stabilizer rod support pin of rear axle broken is the same position(stress concentration spot)is welded twice in the production process,which makes the stabilizer rod support pin of rear axle cold hardening and hardness variation resulting in early fatigue of parts,and finally leads to early fatigue fracture of the stabilizer rod pin of rear axle during the road test.After confirming the cause of the fault,the problem could be solved by optimizing the structure of stabilizer rod support pin of rear axle,adjusting the welding process and other ways.Through this fault analysis and solution,the bench test method for stabilizer rod support pin of rear axle was also summarized,providing test methods for the subsequent development of new vehicles to identify risks early.
关键词
稳定杆销/断裂/应力集中/焊接/台架试验
Key words
stabilizer rod support pin/broken down/stress concentration/welding/bench test
维普
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