Bar wire straightening machine and bar wire straightening method

摘要

A wire rod straightening machine whereby straightness of a wire rod can easily be enhanced, the straightening machine performing straightening by passing a metal wire rod through a plurality of rollers, wherein the wire rod straightening machine is characterized in that the straightening machine is provided with at least one unit group including two or more units adjacent to each other, the angle formed by the directions in which the two or more units straighten the wire rod being ±15°, the units are provided with two or more fixed rolls and a number of movable rolls one less than the number of fixed rolls, the fixed rolls and the movable rolls are arranged in staggered fashion so that the traveling wire rod is held between the fixed rolls disposed on one side of the traveling wire rod and the movable rolls disposed on the reverse side of the wire rod from the fixed rolls, the pushing amount of the movable roll furthest toward the entry side and the movable roll furthest toward the exit side of a unit can be set, and the pushing amount of units adjacent to each other satisfies a predetermined relationship.