我厂81年从日本引进的 NF—250可控硅交流调压推挽式高频机,对其进行消化,并结合我国国情在线路形式上进行移植、推广,这对于早日改变我国焊管高频技术落后状态是有现实意义的。一日本 NF—250高频机特点1.采用可控硅交流调压装置,能根据生产工艺的不同要求,焊接速度(在100米/分以 Our factory imported from Japan 81 years of NF-250 SCR voltage regulator push-pull high-frequency machine, its digestion, combined with China’s national conditions in the form of lines on the transplant, promotion, which is an early change in China’s high-frequency welded pipe Technical backward state is of practical significance. A Japanese NF-250 high frequency machine features 1. Using SCR AC voltage regulator, according to the different requirements of the production process, the welding speed (at 100 m / min