基于DSP的一体化双丝脉冲MIG焊数字波控研究  

Research on digital waveform contronl for integrative twin-wire pulsed MIG welding based on DSP

作　　者：黄石生[1] 缪正平[1] 吴开源[1] 文元美[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：《电焊机》2009年第8期49-52,67,共5页Electric Welding Machine

基　　金：广东省工业科技攻关计划资助项目(2007A010300005)

摘　　要：为改善双丝脉冲MIG焊的协同控制,在基于单一DSP芯片TMS320LF2407A控制下的一体化双丝脉冲MIG焊接系统的基础上,利用DSP内部集成的脉宽调制模块,以软件方式实现了主、从机两台逆变电源PWM信号的直接数字化控制,从而实现主、从机的高频逆变和低频脉冲波形调制,最终实现双丝脉冲MIG焊的波形控制。针对双丝脉冲MIG焊熔滴过渡过程的控制,通过改变焊接参数进行工艺试验。试验结果表明,基于DSP的一体化双丝脉冲MIG焊协同控制系统性能稳定,能有效实现两台弧焊逆变电源之间的协同控制,焊接性能好,稳定可靠。To improve the synchronic control of twin-wire pulsed MIG welding,the control system of integrative twin-wire pulsed power supply based on DSP chip TMS320LF2407A was established in this paper.By adopting the PWM generation modules integrated in DSP, the digital control of the PWM signal is realized in software mode, so the high frequency inverter and low frequency pulsed waveform modulation of master and slave power supplies are realized.Finally the system achieved the waveform control of twin-wire pulsed MIG welding.For the control of metal transfer process in the twin-wire pulsed MIG welding,the welding experiments were carried out.The results of welding experiments show that the twin-wire integrative system based on DSP is stable,and achieved the synchronic control, and the weld quality is excellent.

关 键 词：双丝脉冲MIG焊 波形控制 一体化 DSP 

分 类 号：TG409[金属学及工艺—焊接]