The driving and driven spiral bevel gears of the automobile rear axle are the key parts of the automobile rear axle main reducer to transmit power. They are manufactured by the forging after cutting. Therefore, the quality of the forging will have an impact on the service life of the parts, and the production efficiency of the forging will have an impact on the production cost of the parts. With the rapid development of automobile manufacturing industry, the demand for spiral bevel gear is increasing. How to improve gear production efficiency, shorten manufacturing cycle and reduce production cost has become an urgent problem to be solved. Considering that the driving and driven spiral bevel gears of the automobile rear axle are used together, and the quality requirements and technical requirements are the same, if it is feasible to carry out one-time blanking and supporting production at the same time, it is likely to reduce the production cost and improve the production efficiency. Based on this bold assumption, under the leadership of the tutor, the idea of composite forming process of driving and driven spiral bevel gears is put forward, and the feasibility of the scheme is verified by numerical simulation technology.
The driving and driven spiral bevel gears of automobile rear axle are used together (as shown in the figure). The material requirements are the same, and the forming technical requirements are also the same; Because the driven spiral gear blank is a ring part, it needs to remove the middle excess blank to form, so the existing process of producing the driven spiral bevel gear blank of automobile rear axle has the phenomenon of waste of blank; The two forgings are produced separately and must be heated and formed separately. Based on the above reasons, a new forming process for producing driving and driven spiral bevel gear blank is proposed. Through one-time blanking, the rod of driving spiral bevel gear blank is rolled by cross wedge rolling technology, and then the basin tooth part of driving bevel gear blank and driven spiral bevel gear blank are formed by closed die forging. On the premise of ensuring the quality of the blank forgings of the driving and driven spiral bevel gears, this new process can combine a variety of forming methods to cut the driving and driven spiral gears at one time and produce them at the same time, so as to save materials and improve production efficiency. With the continuous increase of automobile demand, the social demand of automobile rear axle gear will be greater and greater. Therefore, the composite production process of energy saving and material saving can obtain greater social and economic benefits.