The Rule Research Of Metallic Three-dimensional Plastic Flow In Special Section Wing Rail Universal Rolling Process

With the train speed and loading capacity to further improve, the problem of weakwing rail is particularly prominent. Therefore, the design and manufacture of optimizationof wing rail, the production of high precision and high performance wing rail becomeurgent to solve the design and manufacture of high-speed turnout on the subject, wing railsection size precision, flatness directly on the high-speed railway traffic safety and servicelife of the wing rail to influence directly.With the speed and loading capacity of trains are further improved, the problem ofthe weakness of mechanical strength of wing rail seems particularly outstanding.Therefore, the optimization of the design and manufacture of wing rail and the productionof wing rail with high precision and high performance become urgent subject to solve, thesize precision and flatness of the wing rail section play a direct impact on the high-speedrailway traffic safety and service life of the wing rail.In the process of universal rolling of wing rail, the boundary conditions of rail waistand the deformation mechanism of both sides of rail head and rail bottom are different,and the deformation between and among them will restrain and influence each other. Theshape of wing rail used on High-speed turnout and with special section is more complex,if the schedule of universal rolling is unreasonable, it can cause rolled piece to appeartorsion and bending in the process of rolling. If you want to use the universal rollingmethod to produce wing rail with the high quality and high percent of pass, it becomesvery important to study the three-dimensional plastic flow rule of the wing rail rollingmetal, because the metal flow in the process of rolling of wing rail has direct influence onthe longitudinal extension, the section size precision and straightness and the bending afterrolling.First should be to simplify universal rolling model of the wing rail and set up thespread model and the extension model of the wing rail head and rail bottom respectively.And based on that analysis, drawing with the MATLAB programming to analyze theinfluence of the different technology parameters such as pressure ratio and speed of rollingof rail head, rail waist and rail bottom to the spread and extended of wing rail in the universal rolling process.Secondly, establish a theoretical prediction model of the transverse flow volume andvolume flow rate of the metal, longitudinal velocity and lateral velocity of the wing railand the thickness of the rail waist, and on the basis of the analysis, drawing with theMATLAB software to analyze the change of the transverse flow volume and volume flowrate of the metal, longitudinal velocity and lateral velocity of the wing rail and thethickness of the rail waist under conditions of different pressure combination, and analyzethe influence of rolling speed to flow volume, volume flow rate, the longitudinal velocityand lateral velocity at the same time.Finally, establish the model of simulation calculation of wing rail universal rollingwith finite element analysis software DEFROM, and analyze the spread,the extension,longitudinal velocity, lateral velocity, horizontal and vertical displacement of metal in theuniversal rolling process of wing rail as well as the thickness of the rail waist after theuniversal rolling, and compared with the theoretical calculation results.By comparison with theoretical calculation and simulation results,it shows that theerror between the theoretical calculation and the simulation result is very small, and theerror is controlled in less than5%, therefore, and has a prediction to the three-dimensionalplastic flow rule of the metal in the actual production of wing rail.