| 摘要 |
PURPOSE:To enable uniform cooling in the transverse direction of a steel strip and to eliminate the need for a post treatment after cooling by providing a cooling circuit and hydraulic circuit concentrical with the surface of a cooling roll body to said body and changing the crown by adjusting the hydraulic power according to the transverse bending shape of the steel strip. CONSTITUTION:Shells 4, 5 are provided on the outside circumference in the shaft part 3 of a cooling roll 1 and spiral grooves 6 are cut on the outside circumferential surface of the shell 5 to constitute a cooling circuit 6 with the inside surface of the shell 4. The circuit 6 is connected to a cooling fluid supplying path 7 and discharging path 8 in the part 3 to cool the roll 1. A hydraulic chamber 9 is formed between the annular cavity 9 provided on the outside surface of the part 3 and the inside surface of the shell 5 and is communicated via passages 10, 10' to the hydraulic passage 11 in the part 3. The transverse bending shape of a steel strip 2 is continuously detected and the oil pressure of the chamber 9 is changed according to the detected shape to adjust the crown of the roll 1, by which the surfaces of the strip 2 and the roll 1 are brought into tight contact with each other over the entire transverse direction and the strip is uniformly cooled. |
