You rightGear processingHow much do you know about the technology? Today, we will share with you an introduction to seven common gear processing methods and process principles.

There are many methods of tooth profile processing, such as powder metallurgy, milling, forming grinding, gear hobbing, gear shaving, shaping, generative grinding and so on.

Gear milling

Milling teeth with a disc milling cutter or a finger milling cutter belongs to the forming method. The cross-sectional shape of the tool corresponds to the shape of the gear teeth. This method has low processing efficiency and low precision, and is only suitable for single piece and small batch production.

Form grinding for gear machining

It also belongs to the forming process, because the grinding wheel is not easy to dress and is less used.

Gear hobbing

It belongs to the generative method, and its working principle is equivalent to the meshing of a pair of helical gears. The prototype of the gear hob is a helical gear with a large helix angle. Since the number of teeth is small (usually z=1) and the teeth are very long, a worm with a small helix angle is formed around the shaft. After gear shaping and unloading, it becomes a hob with cutting edge and relief angle.

Gear shaving

In mass production, shaving is a commonly used finishing method for non-hardened tooth surfaces. Its working principle is to use the gear shaving cutter to make free meshing motion with the gear to be processed. By means of the relative slip between the two, very fine chips are shaved from the tooth surface to improve the accuracy of the tooth surface. Shaving teeth can also form drum-shaped teeth to improve the position of the tooth surface contact area.

Gear shaping for gear machining

Gear shaping is a common gear cutting process using the generative method in addition to gear hobbing. When gear shaping, the gear shaping cutter and the workpiece are equivalent to the meshing of a pair of cylindrical gears. The reciprocating motion of the gear shaper is the main motion of the gear shaper, and the circular motion of the gear shaper and the workpiece in a certain proportional relationship is the feed motion of the gear shaper.