Research On The Influence Of Residual Stress On The Surface Of Gear Ring Based On Cutting Tool Wear

Vehicle drive system key structural components due to space constraints and special requirements for mission work, the structure mainly thin wall design, and machining high precision, such as carrier, a ring gear, the outer hub and so on. Such parts in the cutting process susceptible to residual stress and deformation, and cutting tool wear is an important factor affecting the process of residual stress. Therefore, the study of tool wear on the residual stress is of great significance. In this paper, the mechanism of the ring gear machined surface residual stress start, through model analysis, FEM simulation and experimental study analyzed the influence of tool flank wear on the cutting force, cutting heat and residual stress, and to verify the simulation effectiveness. The main contents include the following aspects:First, the machined surface forming process through the analysis, study the mechanism of surface residual stress, that the tool wear is achieved by changing the process of cutting force and heat to affect the machined surface residual stress distribution; with a knife-a contact surface for the research work object, shear zone, and knife edge region-stress field workers to calculate the friction and wear zones established after the tool flank wear on the cutting force model; analyze the cutting process in the cutting heat generated and outgoing foundation on, after the establishment of the tool flank wear on the knife- working temperature field analytical model for the subsequent cutting process simulation provide theoretical guidance.Secondly, the research chip separation criteria, knife-Basic crumbs friction model, workpiece material constitutive equation theory on weak rigidity workpiece material for the ring gear member, ABAQUS finite element software to establish a three-dimensional orthogonal cutting ring finite element model.By finite element simulation analysis, from the perspective of the metal cutting mechanism, turning analysis process, under different conditions of tool wear, cutting force, cutting heat and changes of residual stress.Finally, select a specific tool flank wear ring material for finishing machining process, and then use the method of drilling method of residual stress stress tester detection of surface residual stress after finishing processing is measured and compared with the same wear and tear The simulation results were lower than the amount to verify the accuracy of the two-dimensional orthogonal cutting simulation.