某商用车前减振器总成焊缝开裂失效分析优化

Weld Cracking Analysis and Optimization of Front Shock Absorber to One Commercial Car

前减振器总成作为车身与车轮的连接元件,对车辆操控稳定性、驾驶安全性起着重要的作用。文章对某商用车右前减振器在路试中出现的焊缝开裂漏油问题,结合材料成分、断口形貌、金相组织及强度分析确定长时间高温影响产生的疲劳开裂是根本原因。通过优化焊接电流、电压工艺参数生产的减振器总成顺利通过台架及整车可靠性试验验证,为前减振器总成的焊接工艺控制提供借鉴经验。

As a connection between body and wheel,the front shock absorber plays an important role in Driving stability and Driving safety.For weld cracking problem of front shock absorber to one commercial car,this article combines with the material composition,fracture morphology,metallographic structure and FEA finite element analysis to determine fatigue cracking which produced by high temperature for a long period is the root cause.The front shock absorber with optimizing welding current and voltage process parameters meets the requirement of the bench and the vehicle test.