METHOD OF MILLING AND HOBBING ROLLS FOR THE MANUFACTURE OF RODS

摘要

A deep circumferential groove is formed around a roll. The edges of this groove are chamfered, and threading formations are hob milled into the base and walls of the groove so that the mill teeth are not chipped away by impact with sharp edges of the groove. Thereafter the roll is machined down to eliminate the chamfers and reduce the diameter to the desired size. The thread-like formations in the groove of the rolls produce concrete reinforcement and like rods with helical thread-like ribs.