在焊接生产的发展过程中,自从自动焊出现以后,手工电弧焊接的发展受到了一定程度的限制,因此如何提高手工电弧焊接的劳动生产率便成为中心的课题。在生产实践和科学研究上,虽然曾经在这方面取得了辉煌的成就,如高速焊条的生产、快速焊接法的出现、强规范焊接的使用、辅加填料的渗入等,但是这些方法都或多或少带来了一定的局限性或缺点。自从三相电弧焊出现以后,对这一问题才有了比较全面的解决。然而也不 In the development of welding production, the development of manual arc welding has been restricted to a certain extent since the emergence of automatic welding. Therefore, how to improve the labor productivity of manual arc welding has become a central issue. In production practice and scientific research, although there have been brilliant achievements in this area, such as the production of high-speed electrode, the emergence of rapid welding method, the use of strong normative welding, with infiltration of filler, but these methods are more Or less has brought some limitations or disadvantages. Since the emergence of three-phase arc welding, there is a more comprehensive solution to this problem. However, neither