Introduction of several methods of processing for large gears :

1. Milling teeth. This is a disk-shaped modular milling cutter or a finger-shaped milling cutter. It belongs to the forming method. The cross-sectional shape of the milling cutter and the shape of the gear teeth correspond to each other. This method is not only low in efficiency but also relatively low in processing accuracy, and is suitable for small batch production of a single piece.

2. The forming and grinding teeth are also processed by the forming method. The grinding wheel is not easy to modify, and the amount of use is relatively small.

3. Hobbing is a kind of machining method, and its working principle is similar to the mutual meshing of two spiral teeth.

4. Shaving, which is a finishing method, uses the shaving cutter and the gear to be freely engaged. With the relative sliding of the two, finer chips can be removed from the tooth surface to improve the accuracy of the tooth surface . Shaving teeth can also form drum teeth to improve the position of the contact area of ​​the tooth surface.

5. Gear shaping, in addition to hobbing, it is more often used in a gear cutting process that can use the spreading method. When gear shaping, the gear cutter and the workpiece are similar to the meshing of a pile of cylindrical gears. The reciprocating motion of the gear shaper is its main movement, and the circular motion of the gear shaper and the workpiece according to the proportional relationship is the giving motion of the gear shaper.

6. The cutting motion of the gear grinding method is similar to that of hobbing, which belongs to the method used for finishing, especially the hardened gear is a way of finishing. It can use worm wheel grinding, and it is also suitable for grinding of conical grinding wheels or butterfly grinding wheels.

7. Powder metallurgy gears are more suitable for large-scale production. They are high-precision, low-noise processing methods, and have high efficiency and low cost. The mixed metal powder can be pressed into a mold by a professional press to form a metallurgical blank and sintered at high temperature. The stainless steel powder metallurgy gear can be sintered in a vacuum furnace, and then immersed in antirust oil for machining.