所需加工零件系我厂3MG200采煤机的关键零件,定在Su50A车床上加工。该零件外圆直径为φ430K5_(+0.005)~(+0.032),表面粗糙度为Ra0.8,内孔为球面Sφ400H_b_0~(+0.036),内外圆同轴度为φ0.015,厚度为80_(0.074)~0,内外球面配合间隙为0.1～0.15,材料为38CrM_oA1。该零件的关键工序为精车内球面,将胎具固定在卡盘上(如图),以φ430K5外圆和端面定位,采用轴向压紧,避免薄壁件的 The required processing parts is the key part of our 3MG200 Shearer, which is set on Su50A lathe. The outer diameter of the part is φ430K5 _ (+ 0.005) ~ (+0.032), the surface roughness is Ra0.8, the inner hole is spherical Sφ400H_b_0 ~ (+0.036), the inner and outer circular coaxiality is φ0.015, the thickness is 80_ ( 0.074) ~ 0, the inner and outer spherical with the gap of 0.1 ~ 0.15, the material is 38CrM_oA1. The key process of the part is the inner spherical surface of the fine car, the tire is fixed on the chuck (pictured), the φ430K5 is positioned on the outer circle and the end surface, the axial compression is adopted to avoid the thin-wall parts