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3.3关键工序的质量保证 3.3.1主轴颈加工主轴颈:5～φ70=_(0.083)~(0.068)表面粗糙度Rzl 主轴颈圆度:0.005mm 圆柱度:0.005mm 各挡主轴颈对1～5主轴颈最大跳动量0.05mm。(软氮化后) 曲轴毛坯采用热模锻压力机精锻,留加工余量3.5mm(半径方向),曲轴主轴颈圆度、圆柱度、表面粗糙度,各挡主轴颈对1-5主轴颈的跳动量要求较高,要想保证曲轴的加工精度,从粗加工到精加工必须时刻注意减少曲轴主轴颈的变形量,在加工过程
3.3 The key processes of quality assurance 3.3.1 Spindle neck machining Main journal: 5 ~ φ70 = _ (0.083) ~ (0.068) Surface roughness Rzl spindle roundness: 0.005mm Cylindricality: 0.005mm each block the main journal on the 1 ~ 5 maximum jogging spindle 0.05mm. (After soft nitriding) The rough crankshaft is forged by hot die forging press, leaving the machining allowance of 3.5mm (radial direction), roundness of crankshaft spindle, cylindricity, surface roughness, Neck beating requirements are high, in order to ensure the crankshaft machining accuracy, from roughing to finishing must always pay attention to reduce the deformation of the crankshaft main journal in the processing