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我厂750公斤空气锤,由于工作疲劳,使锤杆与活塞过渡断面处断成两部分,见图1。因无备件,只能修复原件继续使用。修复办法是将锤杆内孔φ300扩成φ305D,端面要车平(与内孔垂直度允差0.05毫米),活塞内孔φ320扩成φ321D(端面与内孔垂直允差0.05毫米)。活塞下端面切去15毫来,使活塞下端面与导套上端面的空间不变。活塞内孔与胀套外圆的配合公差为φ321D/jd;锤杆内
Our factory 750 kilograms of air hammer, due to work fatigue, so that the hammer rod and piston transition section broken into two parts, shown in Figure 1. Because there is no spare parts, can only repair the original continue to use. The repair method is to expand the inner diameter of the hammer rod φ300 to φ305D, the end face should be flat (the tolerance of the verticality to the inner bore should be 0.05mm), and the inner bore of the piston should be expanded to φ321D (the vertical tolerance of the end face and the inner bore should be 0.05mm). Cut the lower end of the piston 15 milliseconds, the lower end of the piston and the upper end of the guide surface of the same space. Piston bore and expansion sleeve cylindrical with the tolerance φ321D / jd; within the hammer