Through the gear meshing principle, the machining method of equal height spiral bevel gear is studied, the structure of milling cutter head is optimized, the cutting simulation of equal height gear blank is carried out, the influence of the change of cutting parameters in the cutting process is analyzed, the optimized cutting parameters are obtained through genetic algorithm, and finally the optimized cutting parameters are used to process the gear and detect. The specific work contents are as follows:
(1) The machining principle of equal height spiral bevel gear is studied. According to the gear meshing principle and the method of coordinate transformation, the meshing equation of equal height spiral bevel gear is deduced; Based on the analysis of the machining principle of equal height teeth by tooth surface hobbing method, the cutting surface equation in cutting motion is derived.
(2) Structural optimization of milling cutter head for spiral bevel gear with equal height teeth. The main parameters of milling insert and milling cutter head are analyzed; The clamping structure of milling cutter bar is optimized.
(3) Machining process simulation. The simplified tool tip model of milling cutter bar and the corresponding simplified gear blank model of equal height spiral bevel gear are established. In the simulation software, the actual machining conditions are added. By constantly changing the cutting parameters, the influence of cutting parameters on the cutting process of cutter bar is analyzed.
(4) Cutting parameter optimization based on genetic algorithm. According to the simulation results of cutting force and cutting temperature, based on genetic algorithm, multiple linear regression analysis method is used to fit the objective function, and the cutting parameters are optimized by genetic algorithm.
(5) Machining experiment of equal height spiral bevel gear. In the whole machining process of equal height spiral bevel gear, including grinding, adjustment, machining and testing operations, as well as testing the accuracy of machining equal height spiral bevel gear. The optimized cutting parameters are verified for machining equal height teeth.