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一、机床概况1.机床用途Z031机床是精加工解放牌汽车发动机气缸体曲轴孔、凸轮轴孔、配电盘孔、机油泵孔、曲轴油封孔及前后端面耳环定位孔的专用组合机床。被加工零件如图1所示,其材料为3号灰铸铁,硬度为HB179～229。凸轮轴孔锒装粉末冶金套后镗孔。我厂原使用的2A731型机床也是用来加工这些孔的专用组合机床,但2A731型机床在长期使用中发现达不到凸轮轴孔孔径中φ54~(+0.03)与曲轴孔孔径中φ70.44~(+0.05)(Ⅰ、Ⅳ、Ⅶ),
First, the machine overview 1. Machine Z031 machine tool is finishing Jiefang card engine cylinder block crankshaft hole, camshaft hole, switchboard hole, oil pump hole, crankshaft oil seal hole and front and rear end earrings positioning hole special combination machine. The parts to be machined are shown in Figure 1, whose material is gray cast iron No. 3 with a hardness of HB179 ~ 229. Camshaft hole 粉 installed after powder metallurgy sleeve boring. The 2A731 machine used by our factory is also a special combination machine tool used for machining these holes. However, in the long-term use of the 2A731 machine, it is found that φ54 ~ (+0.03) in the hole diameter of the camshaft hole and φ70.44 ~ (+0.05) (Ⅰ, Ⅳ, Ⅶ),