TIG焊提升引弧控制电路的研究  

Study on lift-igniting control circuit of TIG welding

作　　者：张胜男[1] 元哲石[2] 

机构地区：[1]兰州石化职业技术学院机械工程系,甘肃兰州730060 [2]吉林大学材料科学与工程学院,吉林长春130022

出　　处：《电焊机》2011年第4期45-48,共4页Electric Welding Machine

摘　　要：为了改善现有引弧方法存在的缺陷和不足,研究和开发了新型引弧技术。在保持TIG焊原有优点的基础上,介绍了一种TIG焊提升引弧控制电路,重点探讨利用PWM和PFM两种调制方式相结合控制引弧过程的方法,并深入分析其原理。通过波形测试、外特性测试和相关工艺试验对电路进行检测。实验结果表明:采用TIG焊提升引弧控制电路,可以获得较为理想的恒电流内拐式外特性曲线,引弧成功率93.3%,钨极损耗情况也明显少于普通接触引弧。该电路具有很好的实用性,同时这种引弧系统结构简单、装置轻便、造价较低、易于使用。In order to improve the shortcomings of existing arc-igniting methods,research and develop new arc-igniting technology,while maintaining the original advantages of TIG welding,the control circuit on the lift-igniting for TIG welding is introduced.Especially,the PWM and PFM combining control method and its principle are analysed in detail.Through the detection of waveform testing,external characteristic testing and process testing on this circuit,the experimental results show that the external characteristic curves are ideal type of constant-current with turning inside,the ratio of successful arc-igniting can achieve 93.3% and the tungsten loss is obviously less than common contact arc-igniting by using of the control circuit on the lift-igniting for TIG welding.The circuit is very practical,while this arc-igniting system is simple,portable,low cost and easy to use.

关 键 词：TIG焊 提升引弧 PWM+PFM混合控制 

分 类 号：TG434.4[金属学及工艺—焊接]