PIPE MATERIAL CORRECTION APPARATUS AND PIPE MATERIAL CORRECTION METHOD

摘要

This pipe material correction apparatus comprises: a ring-shaped casing, which is disposed at the periphery of a pipe material with the inner peripheral surface thereof, which is formed in a circular shape, made to face the outer peripheral surface of an axial region of that pipe material; an inner peripheral side roller disposed at the inside periphery of the pipe material with the outer peripheral surface thereof made to contact the inner peripheral surface in the axial region of the pipe material; a pressing pressure means that causes plastic deformation of the axial region of the pipe material with the inner peripheral surface of the casing as a correcting form surface by making a contact pressure force operate between the inner peripheral surface of the casing and the outer peripheral surface of the pipe material; and a rotating means that rotates the pipe material and the inner peripheral side roller relatively around the axial line of the pipe material.