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    • 5. 发明专利
    • REVERSE ROLLING METHOD AND EQUIPMENT THEREFOR
    • JPH0824901A
    • 1996-01-30
    • JP16253794
    • 1994-07-15
    • HITACHI SHIPBUILDING ENG CO
    • DOI HIROSHI
    • B21B1/18B21B13/16
    • PURPOSE:To shorten waiting time and to reduce variance in cutting dimensions caused by difference in temperature, in the case of reverse rolling one by one through plural passes and also the case of cutting operation for plural pieces together. CONSTITUTION:In the case of three-pass rolling and cutting of two pieces of rolling stock, a first rolling stock W1 is provided with a one-way rolling process A from a rolling line on the entrance side to rolling, to a rolling line on the exit side and to a standby; then, a second rolling stock W2 is provided with a round trip rolling process B from the rolling line on the entrance side to rolling, to the rolling line on the exit side, to rolling, to the rolling line on the entrance side and to a standby. In addition, after the first rolling stock W1 is provided with the round trip rolling process B, the second rolling stock W2 is provided with the one-way rolling process A, taken out together with the first rolling stock W1 and cut. Thus, a waiting time for the first rolling stock is greatly shortened.
    • 6. 发明专利
    • METHOD AND DEVICE FOR ROLLING
    • JPH0747404A
    • 1995-02-21
    • JP19756493
    • 1993-08-09
    • ISHIKAWAJIMA HARIMA HEAVY IND
    • NARISHIMA SHIGEKIABE YUJI
    • B21B1/26B21B13/16B21B41/00B21B45/00
    • PURPOSE:To reduce the number of steps of finish rolling, and to reduce the number of finish mills installed on a pass line by performing reverse rolling to a stock to be rolled, and performing reverse rolling for finishing to a rough rolling plate, while holding the obtained rough rolling plate at a prescribed temperature. CONSTITUTION:For instance, a rough rolling plate whose thickness is 80mm becomes a rolled stock whose thickness is 40mm after finish rolling is performed by a finish rolling mill 22, and its rolling plate becomes a rolling plate whose thickness is 10mm after finish rolling is performed by the finish rolling mill 22 again. This rolled plate is wound round by a heat insulation coil box 21 and stored temporarily in the heat insulation coil box 21 in a state that it is held at a prescribed temperature. Thereafter, the rolled material is wound out of the box 21 and finish rolling is performed thereto by the finish rolling mill 22 again, and it becomes a sheet whose thickness is 1.5-2mm, and coiled to a coiling roll 8. Reverse rolling is performed to a slab, and while holding the obtained rough rolling plate at a prescribed temperature, reverse rolling for finishing is performed to the rough rolled plate, therefore, a thin rough rolled plate can be subjected to finish rolling.