Study Of Theory On Shaping Curve Of Right-Angle Step Of Trio Cross Wedge Rolling

Cross wedge rooling is a new technology and technique to produce shaft parts. Improving accuracy of cross-wedge rolling parts is an important area in developing cross-wedge rolling technology at present. The exactitude forming of inner right–angle step is the most important part in the technique of cross-wedge rolling process. Now, the research is not perfection on the forming of the inner right angle step,and rolling–even curve is the key of exactitude forming of inner right–angle step. So, the paper did some deep researchs on the rolling even curve of the right-angle at three cross-wedge rolling.Established the exactitude geometry mold of the rolled part during the rolling curse on analyzing the research of former people.Base on characteristic of three cross-wedge rolling, bringing forward part rolling 2π/3during the rolling-even curse, and departing the through process three stages,two conditions. Establishing the shaping curve equations of right-angle step by theory of volume balance.In addtion, making use of Proe modeling sofrware and Anlysis/Ls-Dyna finite element to simulation the rolling process on the differecncal dies,by establish finite element model on dies and billet, finded influence rules of the rolling even curve on process parameters to the rolling force during the rolling corse, it is import to understand the right-angle forming rules.On base of the study theory, designing the groove of inner right-angle step to carry through hot rolling, and tested the rolling force.The sketch and size of the final product is consistent with expected. This prove the right of theory.This paper is very meaningful to perfect the theory of cross-wedge rolling rolling–even, and creat a new area on the using and developing the cross-wedge rolling technique.