Study of modeling and simulation of full digital controlled PMIG/MAG welding system based on Matlab/Simulink

This paper presents an integrated simulation model for full digital controlled PMIG/MAG welding system with Matlab/Simulink, and it consists of power inverter, digital control system and dynamic arc-load model. An integrated simulation study was done for full digital PMIG/MAG welding, and a method of connecting dynamic arc-load model to the system with controlled current source was presented, in addition, the simulation results were utilized to study the issues of digital control PMIG/MAG welding in this paper. The experimental results validated the developed simulation model, and this simulation study can be applied in implementation of the full digital PMIG/MAG welding and analysis of system dynamic process.

中碳调质高强钢薄板机器人焊接工艺试验研究

采用HCr21Ni10Mn7和H08Mn2SiA焊丝,通过机器人PMIG、MAG焊二种焊接方法在最优工艺参数下对中碳调质高强钢薄板的焊接性进行了对比研究。利用光学显微镜、扫描电镜、能谱等测试方法,对不同焊接方法的焊接接头组织成分、热影响区组织转变规律进行了研究。抗拉强度测试表明:奥氏体焊丝的机器人PMIG焊焊缝抗拉强度较高,满足接头性能要求。显微硬度测试表明:焊缝区硬度较低,热影响粗晶区硬度较高,热影响区软化区较窄。