What are the stages of gear processing?

What are the stages of gear processing?

Gear machining refers to the mechanical components that continuously mesh gears to transmit motion and power. The application of gears in transmission has already appeared. With the development of production, the stability of gear operation has been paid attention to.

The first stage of gear processing is that the gear blank of gear processing initially enters the mechanical processing stage. Because the gear transmission accuracy of gear processing mainly depends on the tooth profile accuracy and the uniformity of tooth pitch distribution, and directly relates to the accuracy of positioning reference (hole and end face), which is mainly the preparation reference for the next stage of gear processing, so that the accuracy of the tooth inner hole and end face basically meet the specified technical requirements.

In the first stage of gear machining, in addition to the machining datum, the machining of secondary surfaces other than tooth profile should also be completed at the later stage of this stage as far as possible.

Generally, there are gear teeth, tooth grooves, end faces, normal surfaces, tooth top circles, tooth root circles, base circles, and indexing circles.

Short for tooth, it refers to each convex part on the gear for meshing. These convex parts are generally arranged radially and contact with the gear teeth on the gear to make the gear continuously mesh.

Gears can be classified according to tooth shape, gear shape, tooth line shape, gear surface and manufacturing method.

The tooth profile of gear includes gear curve, pressure angle, tooth height and displacement. Involute gears are easier to manufacture, so in modern gears, involute gears account for the absolute majority, while cycloid gears and spiral gears are less used.

In terms of pressure angle, the bearing capacity of small pressure angle gear is small; Although the bearing capacity of the gear with high pressure angle is high, the load of the bearing increases with the same transmission torque, so it is only used in special cases. The gear tooth height is standardized, and the standard tooth height is generally adopted. Modified gears have many advantages in various mechanical equipment.