大功率双丝GMAW双脉冲多相位协同控制系统  

Double-Pulse Multi-Phase Coordinative Control System of High-Power Twin-Wire GMAW

作　　者：吴开源[1] 梁焯永 何祖伟[1] 黄玺[1] 程佳[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2016年第2期40-45,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51205136);教育部高等学校博士学科点专项科研基金资助项目(20100172120003);广东省中国科学院全面战略合作专项资金竞争性分配项目(2013B091500082);华南理工大学中央高校基本科研业务费专项资金重点资助项目(2015ZZ084)~~

摘　　要：为提高大功率双丝熔化极气体保护焊(GMAW)的焊缝成形质量,提出了双脉冲波形控制方法,利用DSP内部集成的脉宽调制(PWM)模块,以软件方式实现了并联式主从机PWM信号的直接数字化控制,从而实现主从机的双脉冲波形调制.利用DSP的I/O通信方式建立双脉冲多相位协同控制系统,实现大功率双丝GMAW两路脉冲同步、交替和独立3种输出形式的协同控制.试验结果表明:所设计的双脉冲多相位协同控制系统满足设计要求,焊接过程稳定,双电弧干扰小,飞溅小,焊缝成形良好,双脉冲焊缝表面呈鱼鳞状,能很好地实现大功率双丝GMAW工艺.In order to improve the forming quality of welding seam during the high-power twin-wire GMAW( Gas Metal Arc Welding),a double-pulse waveform control method is proposed.The proposed method adopts the PWM( Pulse Width Modulation) modules integrated in DSP( Digital Signal Processor) to implement the direct digital control of PWM signals for the parallel master and the slave power supply in a software mode,so that the corresponding double-pulse waveform modulation is further achieved.Moreover,a double-pulse multi-phase coordinative control system is developed by using the I / O communication of DSP,and the coordinative control of synchronous,alternate and independent phase outputs of two pulses for high-power twin-wire GMAW is realized.Test results demonstrate that the developed double-pulse multi-phase coordinative control system meets the design requirements well and helps to achieve stable welding with decreased twin-arc interference,little splash and perfect welding seam with scaly appearance.

关 键 词：大功率双丝熔化极气体保护焊 双脉冲 相位 协同控制 脉宽调制 数字信号处理器 

分 类 号：TG434.1[金属学及工艺—焊接]