Angular Contact Ball Bearing Superfinishing And Optimization Of Technological Parameters

The superfinishing of bearing ring groove surface as the last step of bearing processing,but also the bearing ring in the entire processing process is extremely critical step,the quality of superfinishing will have a direct impact on the quality of bearings.At present,comared with foreign countries,there is still a big gap between the precision and efficiency of super finishing machining of bearing ring groove in China,which is difficult to meet the current actual demand,and the precision bearings are still heavily dependent on imports,so it is necessary to carry out more in-depth research on super finishing machining of bearings,in order to obtain more reasonable super finishing machining process and process parameters of bearings.In order to produce bearing rings with a precision that meets the actual needs,the 7006 series angular contact ball bearing inner ring groove superfinishing processing was taken as the research object in this study,through innovative superfinishing process and optimization of each stage process parameters,in order to improve the groove surface superfinishing processing accuracy and processing efficiency.Firstly,based on the change characteristics of the groove surface in the superfinishing process,in order to improve the precision and efficiency of bearing superfinishing,the bearing superfinishing process is refined from the conventional two-step superfinishing to four-step superfinishing,i.e.,coarse superfinishing is refined into coarse superfinishing and fine coarse superfinishing,and fine superfinishing is refined into coarse fine superfinishing and fine superfinishing,by refining the superfinishing process,the machined groove surface precision is basically close to the actual use requirements,and also improves the efficiency of super-finishing process.Secondly,in order to obtain the bearing rings with higher accuracy and fully meet the actual use requirements,based on the last step of superfinishing process test,the quadratic polynomial response surface method(RSM)was used to create an optimized surrogate model with the main process parameters such as workpiece speed,oil stone pressure,oil stone oscillation frequency and superfinishing time as input variables and the groove surface roughness as output variables,and the optimal solution was obtained based on the multi-island genetic algorithm(MIGA).MIGA was used to optimize the surrogate model and a set of optimal solutions were obtained.The reasonableness of the optimal solutions is verified with experiments,the precision and efficiency of bearing groove surface superfinishing are effectively improved on the basis of fine superfinishing,and the precision of the machined bearing rings meets the actual use requirements.Finally,ABAQUS software is used to create a simulation model of bearing inner ring groove super finishing,and the stress changes on the groove surface are used to explore the action of each major process parameter on the groove surface during the superfinishing process one by one,which effectively makes up for the shortcomings of the test.