机床分度蜗轮付是一个关键性的基础件。随着生产技术的发展,普通精度机床的分度蜗轮付,目前已达到4～5级精度,为满足需要和赶超世界先进技术水平,还需要研制更高精度的。由于分度蜗轮付运动精度提高,其接触精度也必须相应地提高。按照JB162-60蜗杆传动公差标准,接触斑点在齿长 Machine indexing worm gear pay is a key foundation. With the development of production technology, the ordinary precision machine tool graduation worm gear pay, has reached 4 to 5 precision, in order to meet the needs and catch up with the advanced world level of technology, but also need to develop more accurate. As the indexing worm pay to improve the accuracy of the movement, the contact accuracy must also be increased accordingly. In accordance with JB162-60 worm drive tolerance standards, contact spots in the tooth length