A theoretical solution of contact stresses in cold hobbing of cone-punch

Abstract

Cold hobbing technology as a non-cutting process is very convenient for the production of tools in different industries, particularly in the production of die cavities. Compared with machining, sparkerosion and electrolytic treatment of tools, as well as the casting of tools, cold hobbing offers many advantages like cost saving due to a considerable reduction of process times, excellent surface finish, longer service life of the dies due to the grain flow etc. Possibilities of cold hobbing technology in the manufacturing of punch-tools have been investigated in Laboratory for technology of plasticity, Faculty of Technical Sciences in Novi Sad for many years. In this paper the process of cold hobbing of cone punch has been analyzed theoretically by slab method. Using this method, identification of main process parameters has been done, and solution of axial contact stress has been obtained.