我厂在修理560kg空气锤时,需要调换锤头和顶盖,但由于锤头和顶盖的过盈量大。最小为195μm;最大300μm。对这样大的过盈量,如采用压入法,则需要80吨以上的压入力,且锤头既长又重,一般工厂维修困难。如采用温差法,则温差要在100℃以上。考虑到顶盖小,冷却容易。为此,我们采用了冷冻装配法, I plant repair 560kg air hammer, the need to change the hammer and the top cover, but due to the large amount of interference head and cover. A minimum of 195 μm; a maximum of 300 μm. For such a large amount of interference, such as the use of press into law, you need more than 80 tons of press-in force, and hammer both long and heavy, the general factory maintenance difficulties. If the temperature difference method, the temperature difference should be above 100 ℃. Taking into account the small cap, easy to cool. To this end, we have adopted the frozen assembly method,