我厂于1971年开始使用的C620车床,其操纵零件螺通杆在孔部位置发生两处断裂。此零件市场无供货。我们决定采用过渡冷焊法修复,虽然成本高一些,但修复后能使机床立即投入生产,而且通过一年多的实际使用,效果良好。 具体方法如下:即在零件的断裂处先用塑性好的银焊条打底,使其与基体金属之间达到原子扩散结合的目的,然后采用铜237电焊条进行焊补,用直流反极 I plant in 1971 began to use the C620 lathe, the control member screw through the hole in the location of two rupture. This part market is not available for supplier. We decided to use the transitional cold welding method to repair, although the cost is higher, but the repair can make the machine immediately put into production, and through more than a year of actual use, the effect is good. Specific methods are as follows: that is, the first parts of the fracture with good plasticity of the silver base, so that the atomic diffusion between the base metal to achieve the purpose, and then welding with copper 237 welding, with DC reverse polarity