Precision control mechanism of angular contact ball bearing based on error transfer

Angular contact ball bearing is one of the most typical types of rolling bearings. However, there are few studies on the influence of the dimensional accuracy of each part of the angular contact ball bearing on the accuracy of the overall structural parameters of the finished bearing. The bearing accuracy and accuracy consistency are the technical problems that need to be solved urgently in the mass production process of angular contact ball bearings.This paper analyzes the relationship between component size and finished bearing structural parameters for high-speed precision angular contact bearing. It obtains the error transfer law between the key parts and the structural parameters, and the influence coefficient of the key parts on the overall structural parameters of the finished bearing is quantitatively evaluated and estimated. In conjunction with the process index of the equipment processing capacity being determined and optimized, a numerical analysis model based on the error transfer law is built for the accurate control of the overall structural parameters. The results show that the diameter (D_w) of the steel ball has the most significant effect on the accuracy of the structural parameters, and the curvature radius (R_i and R_e) of the inner and outer ring grooves have the weakest effect. For instance, the steel ball’s diameter has a 6.996 influence coefficient on the contact angle, although the radius of the groove’s curvature is just 0.81. In conclusion, using the accuracy optimization control model, the deviation matching and overall accuracy optimization control of the typical product H7008 of a company are carried out for the three accuracy grades of P5, P4 and P2, respectively. The accuracy and practicability of the model are verified by actual production, and the flexible batch production and precision manufacturing of angular contact ball bearings are realized.