A Study of the Outer Reversed Taper Tooth Machining Based on the Generation Principle of Curtate Epicycloid

Abstract

A machining method of the outer reversed taper tooth is presented to meet the processing requirements with high precision and high efficiency. The structure characteristic of the reversed taper tooth is analyzed. The curtate epicycloid rotational indexing machining principle for the outer reversed taper tooth is presented. Taking a driving gear machining in the gearbox as an example, the outer reversed taper tooth is machined by the above method, its span of measuring balls, error of the tooth direction and error of the tooth profile are 89.020 mm, 0.009 mm and 0.018 mm respectively. This result meets the accuracy requirements that the span of measuring balls should be in range of 89-89.06 mm, and the error of the tooth direction and error of the tooth profile should be less than 0.01 mm and 0.02 mm respectively. This machining example shows that the proposed machining method is valid. This paper provides a technical support for the high precision and high efficiency manufacture of the outer reversed taper tooth.