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图1所示零件5为我厂产品主轴,主轴直径公差较大为0.1mm,轴上有一对称度要求较高的锥孔,其对称度为0.06mm。在批量生产中采用量棒和百分表检查,效率低,找正时间长;且因轴的直径公差较大,通用检具无法采用。为简化操作,提高效率,我们设计了图1所示的专用检具。经几年的检测使用表明,该检具不仅适用于大批量生产,且能测出对称度误差值。同时使测量的结果不受主轴直径公差大小的影响。
The part 5 shown in Fig. 1 is the spindle of our factory. The major diameter tolerance of the main shaft is 0.1mm. There is a tapered hole with high symmetry requirement on the shaft. The symmetry is 0.06mm. In the mass production of rods and dial indicator used to check, low efficiency, to find a long time; and due to the shaft diameter tolerance, the general seizure can not be used. To simplify operation and increase efficiency, we designed the special gage shown in Figure 1. After several years of testing shows that the fixture is not only suitable for mass production, and can measure the symmetry error. At the same time the measurement results from the size of the spindle diameter tolerance.