精密分度盘是机械分度中应用最为普遍的一种分度元件。凡是在有分度要求的机械产品的生产中,经常会碰到精密分度盘的加工。我厂新产品YW2950型弧齿锥齿轮铣齿机中就有一个Z=38的精密分度盘,见图1。该分度盘圆周齿槽为对称V型槽形式,其相邻齿距最大允差为5微米,最大累积允差为12 Precision indexing plate is the most widely used mechanical indexing an indexing element. Where there is an indexing machinery products, often encounter precision indexing plate processing. I plant a new product YW2950 spiral bevel gear milling machine there is a Z = 38 precision indexing plate, shown in Figure 1. The dial circumferential groove is a symmetrical V-groove, the maximum allowable pitch difference between adjacent teeth is 5 microns, the maximum cumulative allowance is 12