Research on measurement method of rotation accuracy of angular contact ball bearing without assembly

The rotation accuracy detection of angular contact ball bearing(ACBB) needs to be carried out in the assembly, which increases the detection process. Bearings that do not meet the design requirements need to be re-matched with rings. By analyzing the contact state of the rings and according to the geometric relationship, an analytical model of the accuracy parameters of the rings is established. Taking 7006-ACBB as an example, the accuracy parameters of 9 circumferential uniform points of the rings are measured, and the radial runout of the finished bearing is calculated, which is consistent with the detection result of the rotating accuracy measuring instrument. In order to obtain the variation law of rotation accuracy, four kinds of curves are used to fit the contour, and the radial runout changes are calculated respectively. The contour obtained by linear fitting function is close to the detection result. The relationship between the rotation accuracy and the groove radius of curvature, the groove bottom diameter and the wall thickness difference are studied. The distribution law of the groove bottom diameter has the most obvious effect on the rotation accuracy, and the groove radius of curvature has little effect. The method in this paper can achieve the rotation accuracy of the finished bearing under the condition of only detecting the precision parameters of the ferrule, which is not only conducive to the matching of the rings, but also avoids the repeated disassembly and assembly of the rings.