| 摘要 |
PURPOSE:To manufacture the sleeve roll possessing uniform, specified hardness, by carving plural circumferential concave grooves at constant interval in the long size sleeve blank being prepared by the centrifugal casting method, etc., on purpose to form plural sleeve rolls at an interval, and by cooling with the sprayed water these sleeve rolls while being rotated. CONSTITUTION:The long size sleeve roll blank 11 is cast by the centrifugal casting method, and is carved to form circumferential concave grooves 12 at a specified interval; hereby, the plural sleeve rolls 1 of a specified size are formed at an specified interval. This sleeve roll blank 1 is born by respectively two bearing rolls 10 on both sides front and rear, and is rotated. This blank 1 is rotated at a turning speed 3-30 r.p.m., and is cooled by the spray water 9 being sprayed form the spray nozzle group 8. Hereby, the cooling is executed uniformly; and then, the blank 1 is heat treated in order to uniformly possess a specified hardness, before being cut into individual sleeve rolls 1. Thus separated sleeve rolls 1 are shrink fitted to the roll shaft, finishing the roll for use of the universal mill to be employed in the hot rolling of the H-beam. |
