Design And Simulation Technology Research Of Stamping Needle Roller Bearings

The loading performance of needle roller bearing has an important influence on the contact fatigue and wear of bearings.It largely determines the life of the bearing.It is also an important study object of the design of bearing.In the paper,the slice method and finite element analysis are used to study the radial loading performance of the needle roller bearings,and compare with the load distribution and contact pressure.Through the application of slicing method considering the convex roller,the mechanical model of roller bearing is established based on the rolling bearing design method and Hertz contact theory,and deduced the bearing load distribution and contact pressure on the geometry parameter.The performances are obtained with the MATLAB numerical program.The finite element analysis method is based on the finite element analysis software ANSYS.The finite element model is established according to the geometric characteristics of the radial load bearing.The analysis results of the maximum contact stress and elastic deformation with different diameter and length of needle roller,show the relationship of the needle roller parameters with the loading performance,to provide reference for the structure parameters design of needle roller bearing.Thin-wall outer ring of the needle roller bearing is processed by precision stamping using high-quality steel,which has advantages as stable forming quality and manufacturing economy.However,it is easy to appear the problem of extrusion and fracture of the outer ring because of the multiple forming processes and large elastic and plastic deformation.In the paper,numerical simulation of finite element method is used for forming the outer ring of a needle roller bearing by two step process,study on the forming rule of each working procedure,and analysis the influence of die stamping speed and arc fillet size on reaction and feature points stress.These provide the basis for the selection and optimization of process parameters.Finally,the Cut samples are compared with the simulation results,both are in good agreement.It shows the effectiveness to predict the thin-wall outer ring stamping quality using the established method,and can provide a reference for the needle bearing stamping process formulation.