Metal deforming – By use of roller or roller-like tool-element – With non-roller metal deforming station
Patent
1993-08-04
1997-01-14
Crane, Daniel C.
Metal deforming
By use of roller or roller-like tool-element
With non-roller metal deforming station
722418, 72247, B21B 126
Patent
active
055928463
ABSTRACT:
Herein disclosed is an endless hot rolling method using a hot strip mill substantially composed of a roughing mill and a finishing mill having a roll bender and a roll shifter to continuously roll sequentially joined different rolling materials. The method comprises the steps of: calculating a roll shift range in an axial direction for each rolling material so as to provide a desired crown; determining a rolling sequence so as to obtain a common roll shift range for each pair of neighboring rolling materials; connecting a preceding material at the tail end thereof to the head end of the succeeding material, between the roughing mill and the finishing mill; shifting the rolls during transition from the preceding material to the succeeding material so that the roll position corresponding to the joint of the two materials is within a common roll shift range for the materials; and changing the roll bending load in accordance with the roll shift pattern so as to achieve the desired crown of each material. If the width of a common roll shift range for all the materials is at least 50% of the width of the individual roll shift ranges, rolling can be continuously performed without shifting in an axial direction rolls.
REFERENCES:
patent: 4703641 (1987-11-01), Yarita et al.
patent: 4773246 (1988-09-01), Perret
patent: 4823585 (1989-04-01), Hishinuma et al.
patent: 4864836 (1989-09-01), Ochiai
patent: 5323951 (1994-06-01), Takechi et al.
Isobe Kunio
Nikaido Hideyuki
Watanabe Yuichiro
Yarita Ikuo
Crane Daniel C.
Kawasaki Steel Corporation
Schoeffler Thomas C.
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