Research On The Deformation Process And Deformation Force Of Metal Fast Shear Extrusion Connection

With the increasingly fierce competition in the steel market,product quality needs to be gradually increased.In order to improve productivity and reduce resource consumption,The headless rolling technology for the hot rolled steel strip has been developed by the experts in South Korea,Japan,Europe and other countries and regions.On the basis of the existing research,this paper has developed and researched the fast shear extrusion connection technology for intermediate steel block,which has the advantages of simple process and high connection efficiency.In this paper,we will focus on the deformation process of the fast shear extrusion connection and deformation force in process.Based on the theory of plastic deformation,the deformation process of metal fast shear connection can be divided into two stages: plastic deformation and shear connection.The shear deformation and upsetting deformation are simultaneously carried out during the whole deformation process.With the increase of press quantity,the two sheets eventually connect together.The mechanical model and the regression equation were obtained by upper bound method-primitive rectangle technique and multiple regression analysis method,and the deformation force under different parameters was calculated theoretically.The result was obtained from previous research results that the rapid shear deformation of metal is mainly concentrated between the cutting edges.In this paper,using DEFORM-3D finite element analysis software,the single-factor and multi-level simulation experiments on the overlap quantity,press quantity and the edge width are carried out,and the influence of the parameters on the deformation and deformation force is obtained.Through the optimization of multi-objective comprehensive process parameters,the optimal combination of parameters level is obtained: the overlap quantity is 9mm,the press quantity is the 1.25 times of the material thickness,the width of the cutting edge is30 mm.By contrasting theoretical calculation and experimental results,The result was obtained that the deform forces obtained from the two methods are approximate and the error is less than 10%.The results of this paper provide a scientific basis for the analysis of the high temperature solid-state bonding process of intermediate blanks,and also lay a theoretical foundation for the solid-state bonding technology of metal materials.