Research On The Influence Of The Residual Stress And Micro-texture On The Fatigue Life Of The Robot Bearing By Strengthening The Grinding Surface

Bearings are an important part of industrial robot reducers.The life of bearings affects the performance and reliability of machinery and equipment.With the rapid development of modern industrial technology,higher and higher requirements have been placed on the performance of key component bearings,and high-performance bearings with high precision,corrosion resistance,high reliability,friction reduction and resistance,high temperature and heavy load Research and development is a multi-disciplinary research subject,which needs to be accumulated step by step and gradually tackled.In this paper,based on the principle of new technology of enhanced grinding micro-nano machining,the mainstream simulation software ABAQUS and ANSYS are used to simulate and analyze the bearing ring of the industrial grinding robot,to obtain the residual stress and micro-texture data of the workpiece surface after processing,and then to carry out bearing fatigue life analysis.In this paper,we first conduct a theoretical analysis of enhanced grinding micro-nano machining,based on the principle of elastoplastic mechanics,to explore the introduction of the residual stress on the surface of the workpiece after processing and the relationship between the surface micro-weave configuration and the spray speed and angle process parameters.Reveal the principle of introduction of surface residual stress and the mechanism of micro-texture formation.Based on the principle of enhanced grinding micro-nano machining,the single control variable method of ABAQUS finite element software was used to test the single abrasive particle collision with the workpiece.Deep residual stress layer depth,the maximum residual stress and the deepest stress layer depth can be obtained at v = 65 m / s.In the angle change,the residual stress on the surface of the workpiece first forms a participating tensile stress on the surface,and increases with the spray angle.When the spray angle reaches 60 °,the surface residual stress appears as compressive stress,and the surface residual compressive stress increases as the spray angle increases.There is a certain linear relationship between the residual stress value and the surface micro-texture characteristic value,and the surface texture characteristic under certain process parameters can deduce the residual stress distribution.As the radial load increases,the fatigue life of the outer ring of the bearing gradually decreases.Under the same load,the residual stress will affect the fatigue life of the bearing.The compressive stress can improve the fatigue life of the bearing.With the surface pressure of the bearing ring raceway As the stress increases,the fatigue life of the bearing increases,and the residual tensile stress on the surface of the bearing raceway will reduce the fatigue life of the bearing ring.As the residual tensile stress increases,the fatigue life of the bearing decreases more severely.Innercircle.The micro-nano machining test was carried out on the bearing ring under different speed and different spray angle process parameters.The surface residual stress of the processed bearing ring was tested,the hardness test of the strengthened layer,and the surface microtexture was carried out using a metallurgical microscope Observation,and then conducted a bearing fatigue life test,using the bearing temperature and clearance to measure the effect of bearing grinding on the bearing fatigue life,to verify the relevant conclusions of the simulation.