Method and apparatus for removing cutting burr sticking to lower surface

Abstract

A method and an apparatus for removing a cutting burr produced when longitudinally fusion-cutting a slab and sticking to the lower surface of the slab along the fusion-cutting line, which comprise placing a slab having the cutting burr on a roller table comprising a plurality of rollers and horizontally extending with the lower surface having the cutting burr of the slab down so that the line of the cutting burr agrees with the travelling direction of the roller table; lifting a cutter of a burr cutting machine provided below the roller table to bring the cutter into contact with the lower surface having the cutting burr of the slab; horizontally moving the cutter toward the line of the cutting burr of the slab until the cutter passes the line of the cutting burr while keeping the contact with the lower surface of the slab, to cut off a part of the cutting burr by a length corresponding to the total length of a knife of the cutter by means of the knife of the cutter, and, horizontally pulling the cutter back to the original position thereof; forwarding the slab on the roller table in the travelling direction of the roller table by a distance substantially equal to the total length of the knife of the cutter; and, repeating at least once the cut-off of the cutting burr of the slab by means of the cutter, thereby substantially completely removing the cutting burr of the slab.