The grinding test of spiral bevel gear on gleason-600g CNC gear grinding machine is designed. Firstly, the surface morphology of the tooth surface after grinding is observed, and the single factor test is carried out according to the index of surface roughness, and the influence law of various parameters on the surface roughness is studied. Then the variation trend of residual stress in different areas of the tooth surface of spiral bevel gear is studied and analyzed. Finally, the orthogonal test of spiral bevel gear is designed, the empirical formulas of surface roughness and residual stress are summarized, and the optimal parameters are optimized, The test results show that:
(1) After the spiral bevel gear is processed under given grinding conditions, the tooth surface has no obvious defects such as grinding cracks or grinding burns from the macro point of view. The micro morphology becomes better with the increase of grinding speed or the decrease of grinding depth. The value range of gear surface roughness is roughly 0.4 ~ 0.65, and the machined surface roughness decreases with the increase of grinding speed and increases with the increase of grinding depth and gear growth speed.
(2) After grinding, the tooth surface of spiral bevel gear is in a state of compressive stress, and the magnitude of compressive stress is concentrated between 300 MPa and 550 MPa. For the residual stress of tooth surface under the same group of grinding conditions, the value of residual compressive stress in pitch circle area is greater than that in tooth root area and tooth top area.
(3) The orthogonal test results show that the grinding speed has the greatest influence on the tooth surface roughness Ra, followed by the grinding depth, and the gear generation speed has the least influence; Residual stress on gear surface σ The most influential factor is the grinding depth, followed by the grinding speed, and finally the gear generation speed. The power exponent formula of surface roughness and residual stress is obtained. Finally, the relative optimal control solution of surface roughness and residual stress AP = 33.6 is obtained by comprehensive balance method μ m. Vs = 21.7 M / s, w = 10.8 ° / s, RA = 0.4927 μ m， σ = – 414MPa。