The design and manufacturing level of gears will directly affect the performance and quality of mechanical products, for example, in the modern automobile industry booming, usually in every car has 18~30 tooth gear, directly affect the quality of automobile noise, stability and service life. The processing technology and equipment of gear usually has a great impact on the highest level of manufacturing industry can achieve in the field of modern industrial developed countries such as the United States, advanced manufacturing powers such as Germany and Japan's gear manufacturing technology and equipment. Therefore, the position of the gear in the industrial development has been relatively prominent, and is recognized as a symbol of industrialization. From this point of view, it is of great significance to pay attention to the advanced processing technology and development trend of gears.

1, the new development of gear processing technology

General gear manufacturing process includes five stages: preparation of materials, gear blank processing, cutting, heat treatment of tooth surface and tooth surface finishing etc.. The finishing of the gear and heat treatment is the key to the manufacture of the gear, and it also reflects the level of the manufacture of the gear. The development of gear manufacturing technology is largely reflected in the two aspects of the accuracy level and the improvement of production efficiency. At present, all countries in the world mainly from gear processing technology and processing equipment development in two aspects to continuously improve the level of gear manufacturing.

2 、 hard surface hobbing technology

In traditional method, machining the hardened gear tooth surface have been grinding, because the grinding processing efficiency is too low, the processing cost is too high, especially for large diameter, large modulus gear in processing more difficult, so from 1980s onwards, the domestic and foreign enterprises have gradually adopted hard skiving as quenching hard gear (40 ~ 65HRC) semi finishing and finishing method.

Hardened gear hobbing technology called skiving gear. This process is the use of a special on the hard alloy hob, after carburizing and quenching gear tooth surface hardness of HRC58-62 surface by scraping, scraping precision