Common gear processing methods can be divided into the following two:
1. The forming method
This method produces the gear accuracy is low, can only be used for low speed gear transmission, common milling teeth, grinding teeth, etc.
The method of milling teeth belongs to the forming method.When milling the teeth, the workpiece is installed in the dividing head of the milling machine, with a certain modulus of the disc or finger milling cutter between the teeth of the gear milling.When the processing of a tooth after the division, then milling between the next tooth.Characteristics of milling teeth: simple equipment;Low tool cost;Low productivity;The precision of machining gear is relatively low.
The tooth profile shape of the gear depends on the size of the base circle (related to the number of teeth of the gear).
Milling gear with forming method requires simple movement, do not need a special machine tool, but to use indexing head indexing, low production efficiency.This method is generally used for small batch production of low precision gear.
2. Generating method
The involute of the gear surface is formed by the involute method when the gear is machined by the involute method.Most gear machine tools adopt the development method.
At the end of the 19th century, special machine tools and cutters developed to cut teeth using this principle. With the development of production, the smoothness of gear operation was valued.
Common gear processing equipment and technology used
1, hobbing machine hobbing: can be processed under 8 modulus of the oblique teeth
2, milling machine milling teeth: can be processed straight rack
3. Slotting and gear shaping: the inner teeth can be processed
4, cold beating machine teeth: can be processed without chips
5, gear planer gear planer: can process 16 modulus of large gear
6, precision casting teeth: can be mass processing of cheap pinion
7, gear grinding machine gear grinding: can be processed on the precision machine gear
8, die casting machine casting teeth: most processing non-ferrous metal gear
Shaving machine: is a kind of gear finishing metal cutting