在仪器和精密机械中经常采用蜗杆——斜齿轮传动来获得较大的传动比。用于这种传动的斜齿轮齿数较多、螺旋角较小、用通常方法加工常因其差动挂轮比过小,挂轮困难而不能实现,现根据我们的经验介绍两种加工方法供参考。一、无差动调整法无差动调整法可避免使用差动挂轮。其分度与进给挂轮的计算公式如下:式中C分、C进为机床分度和进给常数,Z_1为 Worm-helical gears are often used in instrumentation and precision machinery to achieve large gear ratios. For this kind of transmission helical gear more teeth, smaller helix angle, the usual method of processing often due to the differential wheel is too small, hanging wheel difficult and can not be achieved, are based on our experience to introduce two kinds of processing methods for reference. First, no differential adjustment method No differential adjustment method to avoid the use of differential wheel. Its indexing and feed wheel is calculated as follows: Where C points, C into the machine indexing and feeding constant, Z_1