According to the cutting parameters of equal height spiral bevel gear determined by simulation and the inclined angle of cutter bar, the cutting test of equal height spiral bevel gear is carried out. The number of teeth of bevel gear is 10, the normal modulus MMN is 5.6mm and the helix angle is 50 °. The machining machine for cutting test of equal height spiral bevel gear is glea This is the 175hc CNC. Tri AC 88mm left-hand cutter head is selected for milling cutter head, 17 groups of cutter strips are installed, and the overall runout is controlled at 2 μ Within M. Figure a shows the installation diagram of cutter head and bevel gear blank. According to the simulation results, the cutting speed of equal height spiral bevel gear v = 180m / min and the feed speed f = 0.01mm/t are determined. See Fig. B for the processed gear.
① After the trial cutting, the roughness of contour spiral bevel gear is qualified through visual inspection;
② Check the contact area with the gear hobbing machine, and the contact position, tooth shape and angle of equal height spiral bevel gear are qualified;
③ The pitch deviation and runout deviation of the gear are detected by Klinger P40 gear detector, and the single pitch difference FP, adjacent pitch difference Fu, pitch deviation RP, cumulative pitch error FP and runout error fr are calculated.
The calculated gear pitch error is compared with the tolerance value in the bevel gear meshing tolerance standard din3965. The test results show that the accuracy grade of the gear is within grade 7, which is a qualified product, indicating that the cutting parameters and the inclined angle of the cutter bar of the equal height spiral bevel gear are reasonable.