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液压支架关键零件之一的缸体需要量很大。这种缸体的材料为27SiMn,调质硬度HB=240～280,内孔尺寸精度是H10,圆柱度0.046mm,表面粗糙度Ra0.8μm。图1所示为液压支架缸体之一。采用原来加工方法是精镗后珩磨,产品质量不高,效率很低。近几年来,我厂陆续研制和试验成功的φ125mm、φ160mm及φ230mm等缸筒滚压头,以滚压代替了珩磨工艺。缸体质量完全达到图纸要求,并提高工效近10倍,节省了大量的工具费用;同时操作简单、维修方便。
One of the key components of the hydraulic bracket cylinder needs a lot. This cylinder material is 27SiMn, quenching and tempering hardness HB = 240 ~ 280, bore size accuracy is H10, cylindricality 0.046mm, surface roughness Ra0.8μm. Figure 1 shows one of the hydraulic support cylinder. Using the original processing method is fine boring honing, product quality is not high, the efficiency is very low. In recent years, I plant one after another to develop and test the successful φ125mm, φ160mm and φ230mm other cylinder head, roller instead of honing process. Cylinder quality fully meet the requirements of the drawings and improve work efficiency nearly 10 times, saving a lot of tool costs; at the same time simple operation, easy maintenance.