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一、问题的提出 1.5吨电瓶叉车是我厂根据日本尼桑叉车技术开发研制的具有国际九十年代先进水平的新产品。差速器壳体是该车上关键部件减速器总成中的主体件,它的加工精度直接影响差速器总成的精度和使用寿命。其结构如图一所示。差速器壳体的关键和难加工部位是用于安装轴承的两端Φ55g6外圆。由于设计上要求Φ55g6外圆的同轴度为0.02mm,工艺部门提出了先加工出左端Φ55g6外圆后,以该圆定位上胎具加工右端
First, the question raised 1.5 tons battery forklift is a factory in Japan under the Nissan forklift technology developed by the international advanced level of the nineties new products. The differential case is the main part of the reducer assembly in the key component of the car. Its machining accuracy directly affects the accuracy and service life of the differential assembly. The structure shown in Figure one. Differential key housing and difficult to machine parts are used to install both ends of the bearing Φ55g6 cylindrical. Due to the design requirements Φ55g6 cylindrical coaxiality of 0.02mm, the craft department proposed the first left after Φ55g6 cylindrical, with the circular positioning on the right side of the processing of the tire