Research On Continuous Forming Simulation And Die Design Of High-speed Railway Wheels

In recent years,with the implementation of the “The Belt and Road” national strategy and the construction of the “Eight vertical and eight horizontal” modern high-speed railway network,the demand for high-speed railways in China has increased,and at the same time,it has also resulted in higher safety and reliability of high-speed train operations.The request.High-speed railway wheels,as the key components of train loading,driving,steering,and braking,play a very important role in ensuring the safe operation of high-speed rails.The forming process of high-speed rail wheels is the basis for ensuring the dimensional accuracy and intrinsic quality of wheels,and has received extensive attention from scholars at home and abroad.This topic relies on the key research and development plan(emphasis)in Shanxi province's high-tech field project “Research on Key Technologies and Service Behavior of High-speed Rail Manufacture of Wheels”(201703D111005),taking monolithic high-speed train wheels as the research object,and developing its forging-rolling continuous forming process.The research content mainly focuses on two aspects: on the one hand,the finite element numerical simulation of the continuous forming process of pre-forging,final forging and rolling of high-speed rail wheels;on the other hand,macro-micro coupling of the influence of forging die cavity on the wheel forming law analysis.The research results obtained are as follows:(1)Using the three-dimensional drawing software Solidworks to establish the geometric model of forging dies and roll rolls.Through the finite element software DEFORM-3D,the full-continuous numerical simulation of the pre-forging,final forging and rolling hot forming process of the high-speed iron wheel obtains the equivalent strain,equivalent stress,temperature field distribution,metal flow law,forming load,etc.of the wheel.Related Information.(2)Through the use of three different forging dies to perform the macro-microscopic coupling numerical simulation of the forging process,the influence rule of the forging dies on the wheel forming law was analyzed.It is concluded that the wheel forming quality obtained by the reasonable distribution of metal molds in the pre-forging stage is better.(3)Measure the average crystal grain size of a forged wheel hub hole through the grain size measurement experiment,and obtain the corresponding average grain size through the software's point tracking function at the corresponding position of the simulated workpiece.Comparing the results obtained from the simulation with the average grain size measured by the experiment,the difference between the two results less than 5%,indicating that the simulation results have certain reliability.In this paper,the digitized representation of the forging and rolling production process of high-speed rail wheels and the influence of the forging dies on the forming law of the wheel are realized by means of finite element software.The research results can help the relevant technical personnel to understand the technical principles and technical rules in the wheel manufacturing process.At the same time,it can provide reference for mold design.