我厂底盘车间机修站接受加工“东风”小轿车零件减震器油缸(图1)后,就感到加工油缸内孔φ22是个难题,不但公差小、零件长,而且表面光洁度要求达到 10。选择的零件必须要珩磨才行,但机修站又没有这种机床。车工张国良和惠志坚同志开动了脑筋,用很巧妙的办法;将Z525立式钻床改装 After receiving the processing “Dongfeng” sedan shock absorber cylinder (Figure 1), the machining hole in the machining cylinder is a problem. It not only has the advantages of small tolerance, long parts, but also surface finish of 10. The selected parts must be honed, but the machine does not have such a machine. Che Kwok Cheung and Hui Zhijian comrades started their brains, with a very clever way; the Z525 vertical drilling machine modified