Sleeve Slippage Simulation and Slippage Damage Identification for the Development of Next Generation Sleeve Assembly Roll

Abstract:

Next generation rolls such as super-cermet rolls and all-ceramic rolls can be manufactured using only sleeve assembly type rolls, which have the advantage of being able to reuse the shaft by replacing the damaged sleeves. However, in some cases, failures with unknown causes may occur such as circumferential slippage, shaft pull-out or residual bending deformation at the shrink-fit interface. Such slipping failures cannot be prevented by conventional design concept. This is because even if the resistant torque is greater than the motor torque, the circumferential slippage will occur. Through numerical simulation and miniature roll experiment, the following results are obtained. 1) Even under free rolling condition without motor torque, the circumferential slippage occurs. 2) The slippage is caused by the accumulation of irreversible slip during the roll rotation. 3) The motor torque accelerates the sip amount significantly. 4) The geometry of slippage defect can be identified experimentally. 5) The fatigue strength of sleeve assembly rolling rolls can be evaluated by using √area parameter characterizing the identified slip defects. 6) By preventing the slip damage, the fatigue strength of sleeve rolls can be nearly equal to that of conventional solid rolls without shrink-fit.

• Periodical: Advances in Science and Technology (Volume 158)
• Pages: 89-102
• DOI: https://doi.org/10.4028/p-0cRDfM
• Online since: January 2025
• Authors: Naoaki Noda*
• Keywords: Fatigue Strength, Load Shifting Method, Miniature Roll Experiment, Residual Stress, Rolling, Sleeve Roll, Sleeve Slippage, Slippage Damage, Work Roll

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