角接接头旋转电弧焊接热源模型温度场模拟  

Numerical Simulation on Temperature Field of Rotating Arc Welding Heat Model for Corner Joint

作　　者：毛志伟[1] 姜银松[1] 周少玲 赵滨[1] 

机构地区：[1]南昌大学机电工程学院,江西南昌330031 [2]江西省工业职业技术学院,江西南昌330095

出　　处：《热加工工艺》2015年第13期166-169,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51265036)

摘　　要：针对角接接头旋转电弧焊接温度场模拟问题,建立了旋转电弧焊丝端部轨迹方程;考虑其焊缝特性并引入焊炬夹角,建立了一种改进的热源模型;以Q235为母材,焊炬夹角45°为例,运用该热源模型进行温度场仿真,获得了其动态温度场分布规律。仿真结果表明,靠近上侧板焊缝温度要略高于下侧,说明其焊接熔池不对称,且靠近上侧板熔池的宽度与深度大于下侧板;同时,旋转运动引起的温度叠加作用,使得靠近热源中心前部的温度要略高于热源中心温度。仿真结果为正确选择焊接工艺及工件变形分析提供参考。For corner joints rotating arc welding temperature field simulation problems, the trajectory equation was established at rotating arc welding ends. Considering the weld properties and the introduction of the torch angle, an improved heat source model was set up. Taking Q235 base metal and welding torch of 45° angle as examples, the heat source model was used to simulate temperature field, then, the dynamic temperature field was obtained. The simulation results show that the weld pool is asymmetric and the pool near the plate width and depth is greater than the lower plate. Because the temperature superposition effect of rotary motion, closing to the temperature of the heat source is slightly higher than the center of the front of the center temperature heat source. The simulation results show that it can provide reference for the correct choice of welding process and the analysis of workpiece deformation.

关 键 词：角接接头焊接 旋转电弧 热源模型 温度场分布 

分 类 号：TG402[金属学及工艺—焊接]