In this paper, it has been studied by the slope - controlled SCR rectifier that external characteristic of welder relate to arc digging action and the strong arc force of arc welding power source in manual arc welding formed.

• 利用一种特制的变结构可控硅整流焊机，研究不同焊机外特性对电弧穿透力的影响；探讨了手工电弧焊强电弧力形成机理；并且指出正确设计电源外特性，是获得较强电弧穿透力的途径。