The current status and the development of the cold ring rolling theory, cold ring rolling technology, cold ring rolling equipment, production process control parameters, tooling life and finite element simulation technology are briefly introduced in this paper.

Study on new rotary rolling technology and die life of auto semi-axle;

Rotary forging of pin parts used in rail cars and development of new rotary forging press;

Application of the rotary forging technology in the solid wheel manufacturing;

Study on rotary forging process of spiral bevel gear

Finite element analysis of maximum rolling pressure of rotary roll forming for straight tooth bevel gear;