我厂生产的万能测长仪中,附有多种规格的测量头。其球体部分的尺寸由φ0.8～φ7不等,尺寸公差为0.02毫米,球体椭园度为1u,光洁度为▽12。对于这种要求高,数量大的测量头,过去一直用注射的针管手工研磨加工,效率低,质量不易保证,劳动强度大。现在我们制造成功一台投影小球体磨床,实现机械加工小球体,生产率提高五倍,质量得到保证。 I plant production of universal length measuring instrument, with a variety of specifications measuring head. The size of the sphere part from φ0.8 ~ φ7 ranging from size tolerance of 0.02 mm, sphere ellipticity of 1u, smooth finish ▽ 12. For such a high demand, the number of large measuring head, the past has been used in the injection of manual grinding manual processing, low efficiency, quality is not easy to guarantee, labor-intensive. Now we have succeeded in manufacturing a projection small ball grinder, machining small balls, five times higher productivity and guaranteed quality.