关键词: 冷滚打成形, 丝杠, 数值模拟, 金相组织, 流动规律

Abstract:

The metal flow of lead screw cold roll-beating forming process was studied by means of numerical simulation and experiments herein. First, the principle of the forming technology was analyzed. A FEA model of the cold roll-beating form of lead screw was built, and the stress and strain were analyzed. Then the metal flowing of the forming process was analyzed initially. Experiments were carried out and the metallographic structure, hardness distribution and hardening layer distribution of the obtained experimental piece were analyzed. The results show that the deformation of first roll-beating point is small compared to the deformation of last roll-beating point in the bottom of the tooth space. The hardness of tooth space increases. There is a certain depth of the hardened layer along the normal direction of tooth space. The material hardness and strength can be improved. These results will provide guidance for further study of the forming mechanism and precise parameter control of this new forming process.

Key words: cold roll-beating forming, lead screw, numerical simulation, metallographic structure, metal flowing