【摘要】 为解决双丝熔化极气体保护焊(GMAW)中焊接过程不稳定、焊接效率易波动的问题,采用高速单片机80C320与80C552构成双微机协同控制器,分别控制主、从软开关逆变式脉冲焊接电源,借助现场总线通信协议,通过软件的方式协调主、从电源的工作;同时,采用模糊控制方法对双丝弧长进行闭环控制.从而使主、从电弧分别获得频率一致、峰值相差180°的脉冲电流,有效减少了电弧之间的干扰,使焊接过程稳定,焊缝成型良好.实验结果表明,数字化协同控制灵活性大,可使双丝脉冲GMAW过程稳定.更多还原

【Abstract】 To overcome the un-stability and low effectiveness during the twin-wire gas metal arc welding(GMAW) process,a digitalized synchronized control system consisting of a dual-microprocessor—80C320 and 80C552 high-speed single chip processors—is developed.By means of the CAN(Controller Area Network) communication protocol and the related software,the system can synchronize two soft-switch inverter power sources to produce pulsed welding current with alternating peak and constant frequency.So,the interference between two arcs is effectively reduced,and the welding process becomes stable with a fine welding seam.In addition,the arc lengths are controlled by a close-loop fuzzy control program.Experimental results show that the digitalized synchronized control scheme is very flexible and that it can help stabilize the twin-wire GMAW process.更多还原