| 摘要 |
PROBLEM TO BE SOLVED: To correct even a sharp local deformation place by reliably applying a press-contact force in order to plastically deform a pipe material with th small press-contact force to the minimum area.SOLUTION: A device 1 for correcting a pipe material includes: a ring-shaped casing 2 disposed on an outer circumferential surface of a pipe material T and causing an inner circumferential surface forming a cross-sectional round shape to face the outer circumferential surface of the pipe material T; and a plurality of inner circumferential side rollers 3, which can be abutted with the inner circumferential surface of the pipe material T and are arrayed radially to a support 15. Each of the inner circumferential side rollers 3 is pressed with a plurality of taper surfaces 26 forming a polygonal pyramid shape of pressing means 4 reciprocative along an axial line, and press-contacts the inner circumferential surface of the pipe material T to make it deform plastically and perform correcting work thereof. The pressing means 4 is coupled with a rod of a hydraulic cylinder, and selectively takes a position, for making the inner circumferential side rollers 3 project therefrom, and a retreated position by the reciprocation of the rod. The inner circumferential side rollers 3 and the pressing means 4 perform the correcting work of the pipe material by performing rotation by rotating means provided outside the pipe material via a coupling member. |
