基于ARM控制的脉冲MIG焊机研究  

Research on pulse MIG welding machine based on ARM controller

作　　者：李玉荣 陈克选[1] 李宜炤[1] 王向余 LI Yurong;CHEN Kexuan;LI Yizhao;WANG Xiangyu(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Wuwei Occupational College,Wuwei 733000,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]武威职业学院,甘肃武威733000

出　　处：《电焊机》2020年第4期47-51,I0004,共6页Electric Welding Machine

摘　　要：将ARM芯片STM32F407做简单的外围电路扩展作为控制核心,利用UC3846芯片产生的驱动信号对全桥软开关逆变主电路进行驱动,设计了一台脉冲MIG焊机。该焊机基于等速送丝和电弧电压反馈调节占空比的方式实现了焊接过程的弧长控制,具有过载、过热和过欠压保护等基本功能,数字化界面具有参数调节方便的特点。焊接工艺试验结果表明,通过电流与电压双闭环控制方式设计的脉冲MIG焊机具有较好的弧长调节能力,焊缝质量可以满足焊接要求。In this paper,a pulse MIG welding machine is designed. The ARM chip of STM32F407 is used as the control core to expand the peripheral circuit,and the driving signal generated by UC3846 chip is used to drive the main circuit of the full bridge soft switch inverter. Based on the constant wire feed rate and the mode of arc voltage feedback regulat-ing duty cycle,the arc length control in the welding process is realized. This machine has the basic protection functions of overload,overheat and abnormal voltage. And the digital interface has the characteristics of convenient parameter adjustment. The welding technology test shows that the pulse MIG welding machine designed by the current and voltage double closed-loop control mode has good arc length adjustment ability,and the weld quality can meet the welding requirements.

关 键 词：ARM 脉冲MIG 双闭环控制 等速送丝 占空比调节 

分 类 号：TG434.5[金属学及工艺—焊接]