铜套是工程机械中最常用的一种零件,它与机体常为过盈配合。原采用大锤打入或压力机压入,此法易发生磕碰,使铜套变形,造成废品。当过盈量较大时,容易使铜套表面剥下一层铜屑,影响装配质量。同时,劳动强度大,效率低。为此,我们试验了液态氮冷装工艺,效果很好。 Copper sleeve is the most commonly used construction machinery parts, it is often with the body interference fit. The original use of sledgehammer or press into the press, this method prone to bump, deformation of the copper sleeve, resulting in waste. When the interference is large, it is easy to peel copper foil surface layer of copper scrap, affecting the assembly quality. At the same time, labor-intensive, low efficiency. To this end, we tested the liquid nitrogen cold process, the effect is very good.