In addition, the dynamic resistance in spot welding and its frequency spectrum are analyzed.The relationship between the dynamic resistance curve without type character and nugget size is founded.

• 另外还对焊接过程的动态电阻进行了分析,研究了不具有典型变化特征的动态电阻曲线与熔核直径的关系,并对动态电阻曲线进行了频谱分析。