Geometric Modeling and Manufacturing Method for a Few Teeth Involute Gear with Bilateral Modification

摘要

Aiming at the issue of undercutting and machining difficulties caused by gear with a few teeth, the geometric modeling method and processing method of bi-directional displacement less tooth number were studied. Based on the calculation formula of the involute cylindrical gear and the characteristics of the bi-directional gear, the calculation formula of the diameter of the variable tooth top circle is derived, and the modeling of the gear pair with bi-directional variable bit number is carried out. The research shows that the bidirectional displacement can solve the root cutting problem well and improve the transmission quality. In view of the problem that machining efficiency is not high at present, a method of machining with tangent and radial gear is proposed, and the same gear cutter is used to process different cutting and radial gears, and the feasibility of the above method is verified by the processing test. The research work laid a foundation for further promotion and application of small tooth number gear transmission.