Identification of driving out force of shaft towards preventing coming out failure of shaft in shrink-fitted ceramic sleeve roll

Abstract

Ceramics rolls/rollers recently developed can be used efficiently in steel manufacturing industries to produce high-quality steel plates under high temperature. However, sometimes the shrink-fitted shaft is coming out from the ceramic sleeve during the use even though no external force is applied in the coming out direction. In the previous studies, to realize the phenomena under a large number of roll rotations, numerical simulations were performed by using two-dimensional modelling. Towards preventing the failure, this paper focuses on identifying the driving out force by applying 3D numerical simulation. Here, the driving out force can be defined as the contact force appearing at a ball-stopper designed to prevent the coming out. The results show that the summation of frictional shear stress along the shrink-fitted surface is in good agreement with the driving out force. As the most fundamental design factors, the friction coefficients, the shrink fitting ratios, the shrink fitting length, and the Young’s modulus of the shaft are focused. Then, those effects on the driving out force are discussed towards preventing the coming out failure.