Profile and Longitudinal Modification of a Roll-Finishing Die-Wheel

Abstract

Computer simulations of roll-finishing by a die-wheel with profile and longitudinal modifications were carried out to determine the optimum tooth form of a die-wheel. The simulation results revealed that a die-wheel should be modified by hollowing the tooth form at the position corresponding to the hollowed part of a tooth form roll-finished by an unmodified die-wheel, and so was projected at the position corresponding to this corresponding position. Then, the experiments of roll-finishing were carried out using the modified die-wheel. The results of these experiments showed that the profile and longitudinal modifications of a die-wheel were very effective if altered in the manner mentioned above ; such a die-wheel gave a fairly good tooth form. Further more, the experimental results showed that an interference between the tooth tip of die-wheel, and the tooth root and bottom of work-gear should be prevented, e. g., by tip relief of the die-wheel.