Reasons for affecting the circularity of the inner ring of a rolling bearing

1. The circularity of the inner ring of the rolling bearing is an important quality index, which directly affects the working accuracy, stability and service life of the bearing. Grinding is usually a semi-finishing or finishing process of the inner ring channel, which plays a decisive role in the roundness of the inner ring channel. The roundness of the inner ring channel grinding depends on the accuracy and dynamics of the grinding process system. In addition to the characteristics, it is also closely related to the process parameters of the grinding. The former has been valued by many scholars and has carried out a lot of research, which has greatly improved the roundness of the inner ring of the grinding inner ring. With the improvement of the precision of the grinding process system and the improvement of the dynamic characteristics, the grinding process parameters become the main factors affecting the roundness. Therefore, the influence of the grinding process parameters on the roundness is studied, and the process parameters are ensured to ensure the bearing channel. The grinding roundness and the optimization of the process parameters for grinding the bearing channel are of great significance.

2. The inner ring of the bearing is usually cut into the grinding mode by variable feed rate. The grinding cycle can be divided into four stages: rapid approach, coarse feed, fine feed and no feed grinding. The main factors affecting the roundness of the grinding bearing channel can be summarized as: (1) the accuracy of the process system during the grinding process, which depends on the accuracy of the grinding machine and the positioning principle of the fixture, structural parameters and accuracy: (2) the process system Dynamic characteristics, especially the balance of the grinding wheel: During the dressing and grinding process, the grinding wheel is unbalanced, which will cause forced vibration. The relative position of the dresser and the grinding wheel and the relative position of the workpiece and the grinding wheel during grinding are different due to the dressing of the grinding wheel. And the difference in the stiffness of the process system in these two different cases makes the surface of the workpiece caused by vibration not round: the grinding process parameters will affect the contact stiffness between the grinding wheel and the workpiece, the wear process of the grinding wheel and the damping characteristics of the vibration of the process system. Therefore, the vibration characteristics of the grinding process are affected, which is ultimately reflected in the geometry (ie roundness) and other surface quality of the grinding workpiece: (3) The original error of the workpiece caused by the elastic deformation of the process system: analysis of the grinding cycle workpiece The variation law of geometric shape error shows that the geometric error of the workpiece after grinding is mainly determined by the stiffness of the process system and grinding. Cutting process parameters, grinding wheel wear speed and original workpiece error? Considering the above influencing factors, when the stiffness and dynamic characteristics of the process system are constant (especially the grinding wheel must be well balanced), the roundness error of the grinding workpiece depends mainly on the grinding process parameters, so the roundness test data can be passed. The stepwise regression modeling, selecting important parameters from multiple process parameters, and gradually introducing regression equations, to establish an optimal regression equation for the relationship between grinding roundness and process parameters.

For more information and purchase please visit: https://www.supplyforever.com