The influence of different grinding parameters of gear steel materials on the surface residual stress has been discussed in detail. Therefore, this part will not repeat too much when analyzing the residual stress of spiral bevel gear tooth surface, but only analyze and study the changes of residual stress in different areas of tooth surface under the same process parameters. The results are shown in the figure.
It can be seen from the figure that the tooth surface of spiral bevel gear is in the state of compressive stress after grinding, and the magnitude of compressive stress is concentrated between 300 MPa and 550 MPa, which meets the technical index requirements of spiral bevel gear for residual stress, and the variation law of spiral bevel gear tooth surface residual stress with grinding depth is roughly the same as that of gear steel material under wet grinding, both of which increase with the increase of grinding depth, The value of residual compressive stress on the grinding surface increases gradually, which shows that the grinding test of gear steel can explain the basic law of spiral bevel gear grinding to a certain extent.
In addition, we can see that for the residual stress of the tooth surface under the same group of grinding conditions, the residual compressive stress in the pitch line area is significantly greater than that in the tooth root area and tooth top area. This is because the cutting depth of the tooth line area is larger during the grinding of spiral bevel gear, while the actual grinding depth of the tooth root and tooth top area is less than the given parameter setting, and the value of the residual compressive stress on the grinding surface becomes larger when the grinding depth increases, Therefore, the residual stress in the area of pitch and root is greater than that in the area of tooth line.