改进以前,被磨工件用卡盘夹紧,调整中心架和支爪以找正中心,用主轴直接带动工件转动。 这样,找正中心所需时间较长,并要求技术熟练,主轴回转精度对磨削后工件的内、外径跳动精度影响很大。为了克服以上缺点作了如下的改进(见图a 、图b): a)工件装在两个死顶尖上靠弹簧拉紧,并用 Before the improvement, the workpiece was chucked with a chuck, adjust the center frame and claws to find the center, with the spindle directly drive the workpiece rotation. In this way, it takes a long time to find the center and requires skillfulness. The precision of the spindle rotation has a great influence on the accuracy of the inner and outer diameters of the workpiece after grinding. In order to overcome the above shortcomings made the following improvements (see Figure a, Figure b): a) The workpiece is mounted on the top of the two dead-end by the spring tension, and use