目前,在焊管生产中,供焊管用的带钢厚度变化较大,为了保证焊管质量,需经常根据厚度变化来调节带钢的运动速度或焊接电流。但首钢焊管厂的焊接设备是五十年代从国外引进的老设备,电流是不可调的,因而只能用调速的办法来适应带钢厚度的变化,以保证焊管 At present, in the production of welded pipes, the thickness of the strip for welding pipe varies greatly. In order to ensure the quality of the welded pipe, the speed of the strip or the welding current needs to be adjusted frequently according to the thickness variation. However, the welding equipment of Shougang Welding Factory is an old equipment imported from abroad in the 1950s. The current is not adjustable. Therefore, the speed regulation method can only be used to adapt to the variation of strip thickness to ensure that the welded pipe