The strength design of the bevel gear is carried out from two aspects of the tooth surface pressure and the root strength considering the lubrication conditions. With the development of technology and the application of computers, the development of the world transmission technology tends to adopt hard tooth surfaces, according to statistics, The use of hardened gears greatly promotes the light weight, miniaturization and quality performance of the machine, which increases the working speed of the machine by one level.
Generally, the surface hardening layer (such as high, medium frequency or flame quenching) has obvious transition interface between hardened layer and non-hardened layer. The distribution of hardness is too large, and the quality of hardened hardening is uneven. Hardening of tooth root is difficult, and surface crack is easy to form. The hardness of the tooth surface is low (about HRC55), so the application is gradually reduced.
Deep carburizing, quenching and grinding bevel gears have high precision, high surface hardness (HRC58+4), uniform tooth surface hardening layer, etc., especially suitable for low speed heavy-duty gear transmission, which has high surface hardness and contact strength ratio. The tempered gear is multiplied, and the bending strength is increased by more than 50% compared with the tempered gear.
Bevel gears represent the development direction of industrial and marine gear transmissions.
