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蜗轮齿形的加工,在机修行业一般是采用蜗轮飞刀,而蜗轮飞刀的设计均以蜗杆参数为依据。按常规的飞刀设计,只要蜗杆有一个参数(包括旋向)不同就要设计一把飞刀,但我们从长期的飞刀设计及蜗轮加工工作的实践中总结出来,对于一些螺旋升角λ_f小于8°的蜗轮飞刀,在设计上是可以改进的。常用的飞刀结构,是用一个带有5°斜面的拉销将刀头紧固在飞刀杆上(如图1),过去在设计螺旋升角小于5°的右旋飞刀时,很容易将刀头柄部平面与前刃面的夹角算错,从而使刀头成为废品,即使该夹角计算正确,也会因在加工时难以保证其精度而影响了蜗轮的齿形,所以在飞刀的设计、加工和安装等各方面,都存在着程度不同的问题和困难。
Worm gear processing, in the mechanic industry is generally used worm gear, and the worm gear knife design are based on worm parameters. According to the conventional flying knife design, as long as the worm has a different parameter (including the direction of rotation), a flying knife should be designed. However, we conclude from long-term flying knife design and practice of worm gear processing. For some helix angles λ_f The worm gear less than 8 ° is designed to be improved. Commonly used flying knife structure is a pull pin with a 5 ° bevel fastening the blade head on the flying rod (Figure 1), the past in the design spiral angle of less than 5 ° right-handed flying knife, very It is easy to calculate the angle between the blade shank plane and the front blade surface to make the tool bit waste. Even if the angle is calculated correctly, the tooth profile of the worm wheel will be affected due to the difficulty in ensuring the accuracy of the worm gear during machining In the flying knife design, processing and installation, there are different levels of problems and difficulties.