Pass Design And Rolling Process Optimization Of Heterotype Retaining Ring Profile For Engineering Vehicles

In recent years,with the rapid growth of Chinese economy,China has already become the world’s largest production and sales of engineering vehicles and its stock market.Engineering vehicles are widely used,including construction industry,mining industry and transportation industry.The retaining ring is one of the important parts of the engineering car tire.The retaining ring and the rim cooperate in the assembly of the wheel to ensure the normal use of the tire.Due to the characteristics of heavy load of engineering vehicle retaining ring,higher requirements are put forward for the production of engineering vehicle retaining ring.In addition,because of its special shape and uneven deformation characteristics,the size is difficult to control in the actual production process,which will cause serious wear to the guide device in the production process.In this paper,the baffle pass system is designed to solve the above problems,and the processing parameters are optimized according to the actual production.(1)Based on the theory of pass design,this paper analyzes the shape characteristics of the wheel stop ring and carries on the pass design to the wheel stop ring.Aiming at the phenomenon of side bending in the process of profile rolling,finite element software was used to simulate the first pass rolling,analyze the temperature field,strain field and metal flow law in the rolling process,and reveal the deformation characteristics of the baffle profile in the process of high temperature rolling.(2)Asynchronous rolling can significantly improve the bending defects of rolled pieces during rolling,so the orthogonal test was designed with roller speed ratio,roller diameter ratio,roller center offset and roll reduction as factors.The results show that the key factors affecting the bending of rolled parts are in the order of roll diameter ratio > reduction > offset > speed ratio.The rolling process optimization is as follows: roll speed ratio 1/1.06,roll diameter ratio300/300,offset 18 mm and reduction 6mm.(3)Optimization design based on the principle of minimum curvature profiles four times rolling pass system and the process parameters,using ABAQUS to simulate the process of rolling for four times,found that the bending curvature of export is not greater than 0.000547,after rolling experiments,rolled piece 0.000757 maximum bending curvature.The finite element simulation and rolling experiment show that the dimensional curvature of profile meets the requirements.(4)According to the structural characteristics of the rolling mill,the stress and deformation analysis of the rolling mill frame was carried out based on ABAQUS.The topology optimization of the frame was carried out according to the lightweight requirements of the frame,and the finite element simulation analysis of the optimized frame was carried out again.After optimization,the maximum stress value of the frame is 71 MPa,the safety factor is 13.3,and the weight of the mill is reduced by about 15%.