前言钨极氩弧焊是目前焊接特种金属的主要焊接方法之一。我厂原生产的CA-300型手工交流钨极氩弧焊机,是一个仿制国外的产品。使用单位对该产品普遍反映体积庞大,电弧稳定性差,工作不可靠,不能适应目前工业发展的需要。遵循毛主席关于“独立自主、自力更生”,“走自己工业发展的道路”的教导,我厂于1972年开始对GA-300进行了改型设计工作。经过试验摸索,样机试制,征求用户意见等工作,定下了方案并试制了二台样机。 Introduction TIG welding is one of the main welding methods for welding special metals. I plant the original production CA-300-type manual AC TIG welding machine, is a generic foreign products. The units generally reflect the product bulky, poor arc stability, unreliable work, can not meet the current needs of industrial development. Following Chairman Mao’s teachings of “independence, self-reliance” and “taking the road of our own industrial development”, our factory started the retrofit design work on GA-300 in 1972. After trial and error, trial prototype, solicit user comments and other work, set the program and trial prototype of the two.