基于DSP的一体化双丝脉冲MIG焊机软件设计

Software design of integrative twin-wire pulsed MIG welding based on DSP

双丝焊具有单丝焊无法比拟的优势,焊接效率高,热输入小,能够满足大电流焊接的需要,但其技术复杂,在国内的研究才刚起步。基于DSP芯片TMS320F2808设计了双丝脉冲MIG焊接核心控制系统,实现了双丝的协同工作,采用增量式数字PI算法实现对焊接电流的控制。对双丝电源进行了硬件调试、软件调试和整机联调,调试结果表明电源的静态特性和动态特性良好,满足双丝系统要求。针对8mm厚的45号钢进行了双丝脉冲MIG焊的双丝脉冲不同相位对比实验。在两路脉冲试验参数匹配合适的情况下,进行了若干组试验,焊接效果良好。

Twin-wire welding has much more advantages than single wire welding.Twin-wire is very efficient in welding and has a small heat input which can suit the big current circumstance.But because of its technical complexity,the research is only just beginning in China.the control system of integrative twin-wire plused power supply based on DSP chip TMS320F2805 was established in this article.Using an incremental digital PI algorithm welding current control.The overall power source testing was done on that platform, including the hardware testing and the software debugging.Then the static characteristics and the instant motive characteristics were both tested ,which turned out to be a satisfaction of the Tandem system designed.With twin-wire pulsed MIG welding process for 8mm thick 45 steel,a series of comparative experiments is done,Including twin-wire pulse different phase,Finally good performances and beautiful Tandem welding seams came out, at the premise of the right parameters-matching of the two output pulses.