汽车副车架焊接变形的控制方法

Control Method of Welding Deformation of Automobile Subframe

由于汽车副车架钣金厚度偏厚且都是CO2气体保护焊连接,因而焊接后变形量很大。针对此问题,为研究汽车副车架焊接变形的控制方法,文章以某轿车后副车架为例,通过分析副车架在焊接过程中产生焊接变形的原因,详细阐述了各种控制焊接变形的方法,通过最优的焊接装配树、合理的焊接参数和合理的施焊顺序,采用反向变形法和刚性固定法等措施,减小了焊接变形量,保证了副车架的尺寸精度。该方法为副车架实际生产过程中控制焊接变形提供了重要参考依据。

Because the thickness of automobile subframe sheet metal is too thick and all of them are connected by CO2 gas shielded welding, the deformation is very large after welding. Aiming at this problem, in order to study the control method of welding deformation of automobile subframe, this paper takes the rear subframe of a car as an example, analyzes the causes of welding deformation in the welding process, and expounds various methods of controlling welding deformation. Through the optimal welding assembly tree, reasonable welding parameters and reasonable welding sequence, the reverse deformation method and rigid fixation are adopted The welding deformation is reduced and the dimensional accuracy of the subframe is ensured. This method provides an important reference for the control of welding deformation in the actual production process of the subframe.