小波变换在伺服焊枪电极位移曲线分析中的应用

Wavelet analysis in servo-gun electrode displacement measurement and welding quality control

摘要: 电极位移曲线能够反映出点焊规范参数波动,是一个理想的监控参数。采用离散Daubechies4阶小波对电极位移曲线进行滤波处理,成功地将测量曲线分为电极位移趋势曲线、波动曲线。这两种曲线分别反映了点焊质量的整体质量优劣、过程一致性这两方面特征,提高了位移曲线表征焊接过程的能力,为伺服焊枪的点焊质量控制提供了准确、优良的数据基础。

Abstract: Electrode displacement curve is an ideal parameter for servo-gun resistance spot welding (RSW) quality control. Electrode displacement curve was separated into trend curve and variation curve by wavelet analysis. Trend curve reflected whole quality of the RSW and variation curve reflected process consistency of the RSW. Electrode displacement curve after wavelet analysis provided good data groundwork for servo-gun RSW quality control.