| 摘要 |
PURPOSE:To remove surely scale by intruding abrasive grains into cracks generated in the scale by removing the scale while providing an elongation rate equal to a given value or more to a hot rolling steel strip which is passing through a descaling device which uses the abrasive grains. CONSTITUTION:A tension is provided to a steel strip 1, advancing in the arrow direction, by bridle devices 2, 6 located at the inlet/outlet side. A bend stretching machine 3, a strip-width-camber straightening machine 4, and a brushing device 5 are arranged in sequence between the bridle rolls 2, 6, and the strip between respective devices is supported by guide rolls 8, 11, 15. At that time, plural pairs of bending rolls, consisting each of a bending roll 10 and a backup roll 9, are arranged in the machine 3 to provide a 3.5-15% elongation percentage to the strip 1. Further, the machine 4 formed by disposing a small diametral roll 14 between fixed large diametral rolls 12, 13, straightens the camber. Next, the device 5 formed by arranging roll brushes 17, constituted of NYLON ropes containing abrasive grains, oppositely to respective backup rolls 16 to alternately remove the scale of each side by each brush 17. |
