车辆排气管法兰焊接变形的分析及优化  

Analysis and Optimization of Welding Deformation on Vehicle Exhaust Pipe Flange

作　　者：秦星 王璞 张归圣 Qin Xing;Wang Pu;Zhang Guisheng(WanxiangTongda Corporation,Shiyan 442000)

机构地区：[1]万向通达股份公司,十堰442000

出　　处：《汽车工艺与材料》2024年第2期46-51,共6页Automobile Technology & Material

摘　　要：为避免排气系统管件与法兰焊接中法兰焊接变形过大影响后期排气管装配的密封性,通过建立有限元模型并使用移动高斯热源加载模拟法兰的焊接过程。在分析对比不同约束条件和不同焊接参数条件下法兰的温度场、应力、应变结果后,确定排气管生产制造过程中能够有效减小法兰焊接变形的方案。提出建议的焊接电流、焊接速度和热源半径,为排气管法兰焊接工艺优化提供理论依据。When the exhaust pipe is welded with the flange,the welding deformation of the flange affects the tightness of the exhaust pipe assembly.In order to avoid excessive welding deformation of flange during manufacturing,the FEA model was established with the moving Gaussian heat source to simulate flange welding process.After analyzing and comparing the temperature field,stress and strain results of flanges under different constraint conditions and different welding parameters,the solution that can effectively reduce the welding deformation of flanges in the production and manufacturing of exhaust pipes was determined.This paper proposed suggestions of welding electric current,welding speed and heat source radius,which provided theoretical basis for the optimization of welding process of exhaust pipe flange.

关 键 词：排气管法兰 焊接变形 移动高斯热源 温度场 

分 类 号：U464.149[机械工程—车辆工程]