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汽车尾门焊点开裂解决方案

2020-10-21谭晓蕾宋豪

汽车实用技术 2020年12期

谭晓蕾 宋豪

摘 要:某车企研发的一款新车型在进行耐久路试试验过程中,日常检查发现尾门铰链安装位置焊点开裂一处。在试验过程中发生的开裂,表明该位置零件结构耐久性能没有满足预期目标要求,需要对该零件进行原因分析并提出针对性的解决方案。利用路试中采集到的动载信号,对信号进行有效处理,结合有限元耐久仿真软件手段,对尾门进行耐久寿命仿真计算,根据计算数据进行综合评估,提出提升尾门焊点寿命的有效方案,为车型成功研发提供支持。

关键词:尾门;开裂;铰链;焊点;耐久仿真

Abstract: During the durability road test of a new model developed by an automobile company, a crack was found at the welding spot of the installation position of the tailgate hinge in the daily inspection. The cracking occurred in the process of the test indicates that the durability of the part structure at this location does not meet the expected requirements. It is necessary to analyze the cause of the part and put forward the corresponding solutions. Using the dynamic load signal collected in the road test, the signal is effectively processed. Combined with the finite element durability simulation software, the durability life of the tailgate is simulated. According to the calculation data, the comprehensive evaluation is carried out, and an effective scheme to improve the life of the tailgate welding point is proposed, which provides support for the successful research and development of the vehicle model.

Keywords: Tailgate; Cracking; Hinge; Welding spot; Durability simulation

引言

尾门作为汽车重要的总成,汽车尾门在现实情况中所受到的工况复杂众多,使用有限元仿真手段可以快速计算汽车零件的各种性能,在研发过程中,较大缩短开发周期。对于汽车尾门问题,在实际过程中,难以对用户使用的所有工况仿真分析并进行性能评估。在没有动态载荷输入的情况下,仅通过准静态手段评估尾门结构强度耐久性能极有可能会导致结论不够严谨。尾门总成各零件的结构强度耐久性能一直是汽车企业所关注的重要问题。

在原有仿真技术基础上,结合尾门耐久仿真分析数据,综合评估尾门零件结构耐久性能的思路,可以为后期相同车型开发提供经验依据。

1 理论优劣评估

零件结构疲劳耐久是一个复杂的问题,在不考虑结构本身因素情况下,同种结构的寿命影响因素众多,如温度、湿度、外界作用力等。……

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