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蜗杆是一个定导程螺旋,蜗轮是一个变态斜齿轮。因此,蜗杆传动既具有齿轮传动的性质,又具有螺旋传动的特点。蜗杆与蜗轮的啮合特性既取决于蜗杆与蜗轮共轭齿面的形成,又取决于蜗杆齿面的性质。在滚齿机上用蜗轮滚刀滚切蜗轮时,蜗轮滚刀的分度圆直径和参数必须和蜗杆相同,如果蜗轮滚刀和滚齿机的精度较高,就可以加工出高精度的蜗轮来。但这种加工方法需要专用的蜗轮滚刀,而蜗轮滚刀是一种专用刀具,制造周期长,精度要求高,成本也较高,所以在有些情况下,常借用标准
The worm is a constant lead helix and the worm gear is a perverted helical gear. Therefore, the worm drive not only has the nature of gear transmission, but also has the characteristics of spiral transmission. The meshing characteristics between the worm and the worm gear depend on both the formation of the conjugate tooth surface of the worm and the worm gear and the nature of the tooth surface of the worm. When hobbing a worm gear with a worm gear on a gear hobbing machine, the pitch circle diameter and the parameters of the worm gear hob must be the same as those of the worm gear. If the precision of the worm gear hobbing and gear hobbing machine is high, a high-precision worm gear can be machined. However, this kind of processing method requires a dedicated worm gear hob, and the hob gear hob is a special tool with a long manufacturing cycle, high precision requirements and high cost, so in some cases, often borrow the standard