Surface Of Numerical Simulation And Experimental Research On The Prestressed Abrasive Belt Grinding

Abrasive belt grinding is a rising processing method.Because of its special characteristics of cold grinding,the surface quality of the machined workpiece is excellent,and the compressive residual stress can be formed.However,the traditional abrasive belt grinding is still difficult to obtain the ideal surface integrity for some high performance components(such as aircraft engine blisk and blade).Long-term research and practice show that the compressive residual stress state can be formed on the surface of the workpiece processed by the prestressed processing method,which is helpful to improve the fatigue life of the workpiece,and prestressed processing has been widely used in many fields.Therefore,in order to achieve the purpose of improving the surface quality of the workpiece,this paper takes Ti-6Al-4V titanium alloy as the research object,the residual stress and topography as the main research contents,combines with the advantages of the abrasive belt grinding and prestressed processing.At present,the study of prestressed abrasive belt grinding is still in the preliminary exploration stage yet,and it is very important to carry out research on performance components.Computer simulation is an auxiliary method to effectively reflect parameters changes in the process,and can be used to predict the process and result reasonably.In this paper,the main work of this paper is to combine the simulation with the experiment,the specific introductions are:The mechanism of the cutting process and the residual stress of the abrasive belt grinding is analyzed by using the single abrasive grain.The influence of prestress on the residual stress of the workpiece surface is simulated by Abaqus.Based on the numerical signal processing technology,the surface topography of the abrasive belt is simulated and analyzed,which establishes the foundation for the subsequent surface topography of workpiece.The model of workpiece surface topography is established,which is based on the grain movement trajectory as the basic element,the elastic contact of the abrasive belt grinding and the prestress as the characteristic factor.The relationship between grinding process parameters and surface roughness is studied.The Ti-6Al-4V prestressed abrasive belt grinding experiment is carried out,and the influence of prestress on the surface integrity of the abrasive belt grinding workpiece is obtained by combining the 3D evaluation standard of surface topography,and the accuracy of the simulation results is verified.