Cold Oscillating Rolling Forming Method of Multiple Racks in One Die

Abstract

The invention relates to a cold pendulum rolling precision forming method for a one-die multi-piece rack. The cold pendulum rolling precision forming method comprises the following steps that S1, blanks are manufactured, and the blanks are bars with grooves; S2, the multiple blanks are placed into a cavity corresponding to a lower die, and a pendulum head is arranged above the blanks, the axes ofthe blanks are parallel to a pendulum rolling center line of the pendulum head, and the multiple blanks are symmetrically distributed on two sides of a pendulum rolling center of the pendulum head; and S3, the lower die drives the blanks to perform vertical linear feeding motion to be close to the pendulum head, the pendulum head fixed swung around the blanks and rolled the center line to performsreciprocating arc motion, under the combined action of the pendulum head and the lower die, the tooth-shaped part of the rack is continuously and locally formed by the pendulum head, the final the multiple racks are subjected to cold pendulum rolling forming by a set of dies at the same time, and a rack forge piece is obtained. According to the cold pendulum rolling precision forming method, therack is formed by cold pendulum rolling and plastic forming, energy and materials are saved, production cost is low, meanwhile, a fine internal structure and a continuous metal streamline are obtained, and therefore the service performance is greatly improved, and the service life of the rack is greatly prolonged.

Description

technical field The invention relates to the field of rack manufacturing, and more specifically relates to a cold swing rolling forming method of multiple racks in one mold. Background technique Rack and pinion transmission is an important transmission method in mechanical transmission. This method converts circular motion and linear motion. It has the characteristics of large bearing capacity, stable operation and high reliability. Has a wide range of applications. At present, the processing method of the rack is mainly cutting. Cutting production efficiency is low, material utilization rate is low, production cost is high, and the internal structure cannot be refined, so it is difficult to manufacture high-performance racks. Cold oscillating rolling is a new continuous partial plastic forming process, which has high production efficiency, high material utilization rate, low production cost, and can refine the internal structure. It is the development direction of advanc...

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Problems solved by technology

At present, there is no report on the cold oscillating rolling forming method of multiple racks in one die

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