上海交通大学学报

上海交通大学学报（自然版）

• 金属学与金属工艺 • 上一篇    下一篇

气体保护药芯焊丝双丝焊接电信号稳定性分析

王飞a，b，华学明a，b，马晓丽a，b，吴毅雄a，b，c   

  1. (上海交通大学 a.材料科学与工程学院 焊接工程技术研究所；b.上海市激光制造与材料改性重点实验室；c.金属基复合材料国家重点实验室， 上海 200240)
  • 收稿日期:2009-09-08 修回日期:1900-01-01 出版日期:2010-04-29 发布日期:2010-04-29

Stability Analysis of Electrical Signal in CO2 FluxCored Double Wire GMAW

WANG Fei a，b，HUA Xueming a，b，MA Xiaoli a，b，WU Yixiong a，b，c   

  1. (a.Welding Engineering Institute of Material Science and Engineering； b.Shanghai Key Laboratory of Materials Laser Processing and Modification； c.State Key Laboratory of Metal Matrix Composite, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2009-09-08 Revised:1900-01-01 Online:2010-04-29 Published:2010-04-29

摘要： 为进一步了解CO2气体保护药芯焊丝双丝焊接过程中电弧的稳定性和避免双丝焊接过程中产生的有规律的断弧现象，设计了不同焊接参数值（电压匹配、电流匹配、焊丝间距）的系列实验，采用高速摄像系统同步拍摄了电弧形态，采用Labview信号采集系统同步采集了焊接过程中两电弧的电流、电压波形.采用电流直方图对两电弧稳定性进行了对比分析.结果表明：对于引导电弧，降低跟随电弧电压，降低跟随电弧与引导电弧的电流比例，增大焊丝间距，电弧稳定性得以提高；对于跟随电弧，降低引导电弧与跟随电弧的电流比例，降低跟随电弧电弧电压，增大电弧间距，跟随电弧中断频率降低.最后，将高速摄影拍摄到的电弧图片与采集到的电流、电压波形图相结合，说明了发生断弧现象的循环规律.

关键词: CO2气体保护焊, 药芯焊丝, 双丝, 电弧干扰, 断弧

Abstract: In order to get a further understanding of the arc stability and study the regular phenomenon of arc interruption during the CO2fluxcored double wire GMAW process, a series of experiments (arc voltage matching, welding current matching and interwire distance matching) were designed. Synchronous highspeed camera system was used to take a picture of arc shape and data acquisition system based on Labview was used to collect current and voltage waveforms simultaneously. Then histogram was used to analyze the arc stability. The results show that decreasing the voltage of trailing arc, decreasing the current ratio between trailing arc and leading arc and increasing the interwire distance will enhance the leading arc stability; decreasing the current ratio between leading arc and trailing arc,decreasing the voltage of trailing arc and increasing the interwire distance will decrease the frequency of interruption of the trailing arc. Finally, the captured images of the arc were combined with the acquisition of current, voltage waveforms, by which the arc interruption phenomenon occurred in the welding process was analyzed.

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