我厂于1987年从牡丹江无线电六厂购进二台日本大皈生产的CPX—350型CO_2气体保护自动焊机。经三年多的使用,CO_2不加热减压器经常发生漏气(跑直杆)故障,经研磨修理可继续使用。漏气的主要原因是CO_2气体中有渣子,经常垫住阀片,由于气体不纯而使阀片磨损过甚,使阀片封闭不严。几经修理,现已到了再也不能修复的地步。我们对原机进行了认真分 I plant in 1987 from Mudanjiang Radio Six plant purchased two Japan Daiichi production of CPX-350 CO_2 gas automatic welding machine. After more than three years of use, CO_2 without heating pressure reducer often leak (run straight rod) failure, after grinding and repair can continue to use. Leakage is mainly due to CO_2 gas in the slag, often paddle valve, due to impure gas valve wear too much, so that the valve seal lax. After repair, it has now reached the point where it can no longer be repaired. We had a serious point on the original machine