摘要
试验发现,直流电阻对焊时产生变形的起始时刻处在通电期间及断电时刻.如为断电时刻,变形较小;如在通电期间则变形较大.焊接过程中,焊接电流和工件两端电压发生有规律的动态变化,变化规律与变形和温度有关.本文对此进行了分析,并提出要保证一定的变形程度,可以采用位移(即工件的缩短量)控制通电时间,从而实现保证足够热输入的设想.
The experiment of DC upset welding on shows that the deformation appears both at the welding current on and as the current off. It is large during on time, and small as off time. When welding pressure keeps constant , the deformation depends on heat imput . The variations of welding current and voltage depend on deformation and temperature. Finally,the deformation can be adjusted by controlling the displacement.
出处
《焊接》
1997年第5期5-8,共4页
Welding & Joining
