METHOD OF ROLLING STEEL RODS AND WIRES WITH GROOVELESS ROLLS AND GROOVELESS ROLLING ENTRY GUIDE

摘要

A method of rolling steel rods or wires by grooveless rolls for reducing sectional areas of the rods or wires achieves a stable rolling operation with high efficiency by limiting to less than a predetermined value a ratio of a long side to a short side of a cross-section of a rectangular cross-sectional blank material which has passed through each pair of grooveless rolls or limiting a ratio of a diameter of each pair of grooveless rolls to a gap therebetween. A method of rolling steel rods or wires by grooveless rolls also achieves high elongation efficiency to make stable the rolling operation by limiting a ratio of a diameter of each pair of grooveless rolls to a gap therebetween. A grooveless roll entry guide for use in grooveless rolling securely holds a blank material from an entry to an exit in a gap between a pair of grooveless rolls to eliminate overturns at ends of the blank material and fins extending from the material due to the overturns.