As a transmission part, spiral bevel gear is widely used in automobile, machine tool, ship, aircraft and other related fields. It has the advantages of strong bearing capacity and stable transmission performance, which is favored by the machinery industry. As an important transmission part in mechanical equipment, the quality of spiral bevel gear is directly related to the performance and safety of equipment. Especially in the automotive field, as one of the important parts of the main reducer of the rear axle, the spiral bevel gear plays a very key role in the transmission process of the vehicle.
Since 2000, the strong market demand has stimulated the rapid development of the automobile industry and maintained a good trend. In 2007, the national automobile sales volume doubled compared with 2003, and there were 20% and 30% growth rates in 2009 and 2010. According to the current situation, China’s total automobile production and sales volume ranks first in the world, and has entered a stable growth stage. From a long-term perspective, this trend of rising automobile output in China will increase the market share, so there are higher requirements for its forging forming process. Therefore, it can be seen that the in-depth research on the driven spiral bevel gear blank of automobile rear axle is particularly important.
The early forming process of spiral bevel gear blank was mainly forging process, that is, open die forging and closed die forging. This forming process has the disadvantages of high material consumption, high production cost and high labor intensity. With the progress of science and technology and people’s in-depth study of spiral bevel gear blank, swing rolling and ring rolling forming processes appear. These two processes greatly solve the problems of traditional methods and have the advantages of high production efficiency, low labor intensity and low production investment. This forming process is also known as advanced manufacturing process.