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近年来,在仪器仪表及輕工业机械上常常采用傳动比可变的齿輪傳动,其中常見的一种就是椭圓齿輪。椭圓齿輪的外圓是一个椭圓柱。椭圓柱的加工大都采用靠模法車削或銑削,但靠模装置比較复杂,并且靠模本身也是一个椭圓柱或椭圓柱的包络面,因此在没有特殊設备的条件下,要制造一定精度的靠模是較困难的。特别在多品种小批生产时,采用靠模法加工就不够經济,同时加工精度也不高。
In recent years, instruments and light industrial machinery often use gear ratio variable transmission, one of the most common is the oval gear. The outer circle of the oval gear is an elliptical cylinder. Most of the processing of the oval column by the method of turning or milling, but the master device is more complex, and rely on the model itself is an elliptic column or elliptical column envelope, so in the absence of special equipment, to create a certain accuracy The model is more difficult. Especially in the small batch of multi-species production, the use of mold processing is not economical enough, while the processing accuracy is not high.