高强度的螺旋电焊钢管生产,必须解决内外缝双面焊接这一关键问题。从这一要求出发,设计并制造了用放大机控制送丝电动机系统的自动电焊机。这个新线路不仅具有优越的自动焊机的性能,而且由于加上负反馈和其它 High-strength spiral welded steel pipe production, welding must be solved inside and outside the seam of this key issue. From this requirement, we design and manufacture an automatic welding machine that controls the wire feeding motor system with an amplifier. This new circuit not only has the superior performance of automatic welders, but also due to the addition of negative feedback and others