华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (11): 5-9.

• 机械工程 • 上一篇    下一篇

弧焊过程的动态电阻波形分析

薛家祥 董飞 王振民 杨三国 洪森   

  1. 华南理工大学 机械工程学院,广东 广州 510640
  • 收稿日期:2006-03-31 出版日期:2006-11-25 发布日期:2006-11-25
  • 通信作者: 薛家祥(1962-),男,教授,博士后,主要从事弧焊过程小波分析、神经网络模糊控制及新型弧焊逆变器的研究. E-mail:mejiaxue@scut.edu.cn
  • 作者简介:薛家祥(1962-),男,教授,博士后,主要从事弧焊过程小波分析、神经网络模糊控制及新型弧焊逆变器的研究.
  • 基金资助:

    广东省自然科学基金资助项目(04020100)

Analysis of Dynamic Resistance Waveforms in Arc Welding

Xue Jia-xiang  Dong Fei  Wang Zhen-min  Yang San-guo  Hong Sen   

  1. School of Mechanical Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2006-03-31 Online:2006-11-25 Published:2006-11-25
  • Contact: 薛家祥(1962-),男,教授,博士后,主要从事弧焊过程小波分析、神经网络模糊控制及新型弧焊逆变器的研究. E-mail:mejiaxue@scut.edu.cn
  • About author:薛家祥(1962-),男,教授,博士后,主要从事弧焊过程小波分析、神经网络模糊控制及新型弧焊逆变器的研究.
  • Supported by:

    广东省自然科学基金资助项目(04020100)

摘要: 利用自行研制的焊接动态电弧小波分析仪对两台CO2,焊机的焊接过程进行了分析测试.结果表明,动态电阻能综合反映焊接电源的电气特性.起弧时动态电阻值应迅速上升到稳定值,以保证引弧顺利.在焊接过程中应减少动态电阻纹波干扰,其峰值维持一段时间有利于熔滴平稳过渡.收弧时动态电阻值应在一个过渡周期内,由峰值平稳上升至无穷大,避免尖峰.分析结果可为改进焊接工艺和波形控制方法提供依据.

关键词: 动态电阻, 电弧稳定性, 飞溅, 波形分析, CO2

Abstract:

The welding processes of two CO2 arc-welding machines were tested and analyzed using a self-developed welding dynamic arc wavelet analyzer.The results indicate that the integrated electric characteristics of welding power can be reflected by the dynamic resistance,that the dynamic resistance should quickly increase to a stable value to make the striking successful,that the ripple interference of dynamic resistance should be reduced and the
peak value of dynamic resistance should remain constant in a certain period to realize a smooth droplet transfer in the welding process,and that the dynamic resistance should smoothly increase from the peak value to a infinite value in a transition cycle to avoid an abrupt ascend in the process of arc extinguishing.All these results lay a founda-tion for the improvement of arc welding technology and arc waveform control.

Key words: dynamic resistance, arc stability, spatter, waveform analysis, carbon dioxide arc welding