The Control of Axial Elastic Deformations of Non-Rigid Bearing Rings when Flat Grinding End Surfaces

The authors propose the algorithm and method of determining optimal conditions for grinding end surfaces of non-rigid bearing rings that guarantees obtaining predefined quality requirements to the machined surface (surface roughness parameter Ra, absence of grinding burns, required flatness tolerance of end surface) while ensuring the maximum efficiency of the process. Mathematical models of the cutting force components, grinding ratio, and roughness of the machined surface (Ra parameter) are obtained by the method of full factorial experiment of the 24 type where 4 is the number of factors. The input factors (grinding wheel hardness, depth of grinding, table feed speed and run) are considered as the optimization parameters of the grinding process. Mathematical models of the output factors are used to limit the range of allowable values of the optimization parameters. The resulting efficiency is chosen as an objective function. The optimization of parameters in the range of allowable values is carried out with the view of ensuring maximum efficiency of the process. The conditions of providing the required flatness tolerance of the bearing ring end surface are determined. These conditions take into account axial deformation of the ring under the magnetic field of the machine and the radial component of the grinding force.

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