Research On The Influence Of Intensified Grinding Get Pressure On The Wear Resistance Of The Inner Ring Of Robot Cross Roller Bearing

Robotic cross roller bearings are often used in harsh working conditions such as heavy loads,vibration and shock,which made the rolling elements in the bearings and the ring raceways prone to impact friction,resulting in the rupture of the lubricating oil film,and intensified the friction wear of the raceway of the ferrule which led to bearing failure.As a new type of metal surface strengthening treatment technology,reinforced grinding can effectively improve the wear resistance of the material and make the bearing have a longer service life.As for bearings,domestic and foreign scholars have conducted in-depth research on the wear resistance of deep groove ball bearings and angular contact ball bearings,while the research on the wear resistance of crossed roller bearings has just begun.The inner groove of the roller bearing inner ring is subjected to reinforced grinding processing with different injection pressures,to study the friction and wear performance of the bearing inner ring samples after processing,and to explore the reinforced grinding process for the optimal injection pressure of the crossed roller bearing inner ring.The popularization and application of technology provides theoretical and realistic basis.The main research contents and conclusions of this article are as follows:(1)A simulation of the collision process between a single abrasive and the workpiece was established.It was found that the high-speed instantaneous collision of the abrasive and the workpiece caused the surface of the workpiece to deform and produce micro-pits,which affected the roughness and wear resistance of the workpiece.(2)In different jet pressure Reinforced grinding experiments,it was found that the reinforced grinding can obtain a certain thickness of the reinforced layer on the bearing surface,and the thickness of the reinforced layer and the clarity of the observed increase with the increase of the injection pressure,but the growth rate gradually Slow down until it stabilizes.(3)Using a microhardness tester to measure the surface microhardness of the sample,it was found that when the injection pressure is 0.2 ~ 0.4MPa,the microhardness value of thesample surface increased rapidly,and the increase reached 11%.When the injection pressure is 0.7 ~ 0.8MPa,the micro hardness increases slowly,with an increase of only 1.1%.(4)The inner ring specimens of the robot cross roller bearing were subjected to friction and wear tests under two friction environments of dry friction and oil lubrication.It was concluded that in the dry friction test,the friction coefficient and wear amount of the bearing samples subjected to enhanced grinding were high.For samples that had not been subjected to enhanced grinding,and with the increase of the injection pressure,the friction coefficient and the amount of wear showed a tendency to decrease first and then increase.In the friction test under oil lubrication conditions,the reinforced grinding process,the friction coefficient and the amount of wear of the bearing sample wear lower than the samples without enhanced grinding.With the injection pressure increases,the friction coefficient of the sample continues to decrease and eventually stabilizes.(5)Wear layer thickness,microhardness,dry friction and friction coefficient and wear under oil lubrication conditions were considered,when the injection pressure was 0.55 ~0.7MPa,the wear resistance of the inner raceway of the robot cross roller bearing inner ring was the best.