基于DSP波形控制的GMAW电源系统
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摘要
焊接薄板时,为减小热输入,减少焊件变形,控制短路过渡中的飞溅,研究配合推拉丝系统且以DSP(TMS320F2812)为控制核心的GMAW焊接电源系统,制定相应的波形控制方案.在波形控制方案中摒弃在短路初期降低电流的方法,采用驱动模块输出较小固定脉冲宽度的方案.焊接实验结果表明,设计的波形控制方案与推拉丝系统匹配良好,能实现低能量输入、飞溅较小的焊接.
In order to reduce the heat input and welding deformation,and control the welding spatter in the process of thin plates welding,the GMAW welding power supply system coupled with push-pull wire feeding system was studied and designed,where the digital signal processor(TMS320F2812)was taken as the control core.The corresponding waveform control scheme was designed.The method of reducing the current in early period of short-circuit was abandoned and an option of making the driving circuit output fixed pulse with smaller width was adopted.The welding experimental result showed that waveform control scheme designed could match with the push-pull wire feeding system precisely and welding with low energy input and little spatter was realized.
In order to reduce the heat input and welding deformation,and control the welding spatter in the process of thin plates welding,the GMAW welding power supply system coupled with push-pull wire feeding system was studied and designed,where the digital signal processor(TMS320F2812)was taken as the control core.The corresponding waveform control scheme was designed.The method of reducing the current in early period of short-circuit was abandoned and an option of making the driving circuit output fixed pulse with smaller width was adopted.The welding experimental result showed that waveform control scheme designed could match with the push-pull wire feeding system precisely and welding with low energy input and little spatter was realized.
引文
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[6]张志坚,李鹤歧,李虹.实时显示的DSP控制逆变弧焊电源设计[J].兰州理工大学学报,2006,32(3):19-21.
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[9]董志强,陈克选,李欢.基于交流伺服电机的推拉丝送丝系统研究[J].电焊机,2013,43(6):1-5.
[10]徐科军,陈志辉,傅大丰.TMS320F2812DSP应用技术[M].北京:科学出版社,2010.
[2]李旭光,胡小建.基于DSP的CO2气保焊STT波形控制技术[J].现代焊接,2009,76(4):15-16.
[3]黄鹏飞,刘嘉,吕耀辉,等.逆变GMAW焊机短路过渡波形控制研究[J].材料科学与工艺,2004,12(5):471-475.
[4]黄石生.弧焊电源及数字化控制[M].北京:机械工业出版社,2009.
[5]石玗,沈利民,卢立晖,等.快速原型的焊接电流波形控制实现[J].兰州理工大学学报,2012,38(3):18-21.
[6]张志坚,李鹤歧,李虹.实时显示的DSP控制逆变弧焊电源设计[J].兰州理工大学学报,2006,32(3):19-21.
[7]张撼鹏.新型低能量输入电弧焊接系统及其过程控制研究[D].北京:北京工业大学,2007.
[8]冯曰海,刘嘉,殷树言.全数字控制短路过渡CO2焊接波形控制研究[J].焊接技术,2005,34(6):51-53.
[9]董志强,陈克选,李欢.基于交流伺服电机的推拉丝送丝系统研究[J].电焊机,2013,43(6):1-5.
[10]徐科军,陈志辉,傅大丰.TMS320F2812DSP应用技术[M].北京:科学出版社,2010.