The forging of spiral bevel gear belongs to complex curved surface forging. As shown in the figure, the forging difficulty of a pair of spiral bevel gear pairs meshed with teeth is closely related to the tooth shape. Generally, the cone angle of large wheel pitch is large, the axial height difference of its teeth is small, and the material flow displacement in the axial direction is small during forging, so it is more suitable for forging. On the contrary, small wheel is not conducive to forging, If forging processing requires tooth profile design and trimming, so that the teeth can be fully filled and there is no interference in the die drawing process, this chapter will carry out tooth profile design and precision forging trimming through two spiral bevel gears with different modules.
Spiral bevel gear pair can be applied to the transmission of intersecting shafts. Due to its high degree of reconnection, its transmission performance is better than straight bevel gear, but the tooth surface is more complex than straight bevel gear, and the processing method is more cumbersome. It is necessary to use specific tooth milling machine tools. Compared with the basic parameters of spiral bevel gear and straight bevel gear, spiral bevel gear has more influence on the helix angle of tooth surface than straight bevel gear, At the same time, the number of teeth participating in meshing increases and the coincidence degree increases. Therefore, it can be used in high-speed and heavy-duty transmission with excellent performance.
Precision forged straight bevel gear has been applied to industrial production and plays an important role in automobile and other mechanical fields. Compared with straight bevel gear, spiral bevel gear only changes from plane tooth shape to curved tooth shape. By designing the tooth shape of spiral bevel gear suitable for forging, the performance of forged spiral bevel gear is studied.