The authors put forward a cold rotary forging mthod

and the method simplifies the die structure

adopts the local line contact continuous plastic forming. The algorithm of displacement adjustment was used to construct the compensation iteration system of springback error

which was used to correct springback error of the rolling die. The feature of the system was first estimating the workpiece geometry using correction algorithm when the workpiece was assumed no springback

then obtaining the new rolling die with the design principle of rolling die. Based on the basic theory of elastic-plastic finite element method

instance of verification was carried out with the aid of finite element numerical simulation technology. The results of this research confirm the compensation iteration system of springback error just need three iterations to make the workpiece tolerances within the permitted scope

therefore it can greatly shorten the production cycle and cost.