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US 5,365,764 AGranted
Cross rolling mill, cross rolling method and cross rolling mill system
AssigneeHitachi, Ltd.
InventorsToshiyuki Kajiwara, Tsuneo Ochiai, Hidetoshi Nishi
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AssigneeHitachi, Ltd.
InventorsToshiyuki Kajiwara, Tsuneo Ochiai, Hidetoshi Nishi
Estimating the term…
In a rolling mill comprising upper and lower work rolls crossed each other to perform strip crown control, a straight line connecting the center of an operation side screwdown screw and the center of a drive side screwdown screw is inclined relative to a line perpendicular to the rolling direction. A cross angle .theta. to be controlled is changed in opposite plus and minus directions about the straight line connecting both the screwdown centers. A large extent of strip crown control can be achieved with a smaller cross deviation than usual in the prior art, thereby permitting omission of an equalizer beam. Further, change in the extent by which strip crown is varied upon control with respect to the cross angle becomes substantially linear and hence control is more easily conducted. Since the cross angle 2.theta. between the two work rolls is larger than 2.degree., the transition temperature is not changed and uniformity in quality can be ensured.
A rolling mill comprising:
A rolling mill comprising:
A 2-high rolling mill for rolling material in a rolling direction in a rolling plane comprising one mill housing, first upper and lower work rolls and second upper and lower work rolls assembled in said mill housing to build up two sets of 2-high cross mills, first drive means for inclining said first and second upper work rolls together, and second drive means for inclining said first and second lower work rolls together, whereby a cross angle of said first and second upper work rolls and a cross angle of said first and second lower work rolls are simultaneously changed by said first and second drive means to perform strip crown control.
A hot rolling mill system including at least one reversible rough rolling mill and a train of finish rolling mills, wherein said at least one reversible rough rolling mill comprises:
A hot rolling mill system including at least one reversible rough rolling mill and a train of finish rolling mills, wherein said train of finish rolling mills includes at least one finish rolling mill comprising:
A hot rolling mill system including at least one reversible rough rolling mill and a train of finish rolling mills, wherein said at least one reversible rough rolling mill is a 2-high rolling mill comprising one mill housing, first upper and lower work rolls and second upper and lower work rolls assembled in said mill housing to build up two sets of 2-high cross miles, first drive means for inclining said first and second upper work rolls together, and second drive means for inclining said first and second lower work rolls together, whereby a cross angle of said first and second upper work rolls and a cross angle of said first and second lower work rolls are simultaneously changed by said first and second drive means to perform strip crown control.
A method of manufacturing strip material using a rolling mill comprising:
A rolling method of using a 4-high rolling mill for rolling material in a rolling direction in a rolling plane comprising upper and lower work rolls defining a gap therebetween, upper and lower back-up rolls, and an operation side force applying device and a drive side force applying device for applying a force to at least one of said upper and lower back-up rolls in a direction toward the gap, at least said upper and lower back-up rolls being crossed with respect to each other;
A rolling method of using a 4-high rolling mill for rolling material in a rolling direction in a rolling plane comprising upper and lower work rolls, upper and lower back-up rolls defining a gap therebetween, and an operation side force applying device and a drive side force applying device for applying a force to at least one of said upper and lower back-up rolls in a direction toward the gap, said upper and lower work rolls being crossed relative to said upper and lower back-up rolls and also crossed with respect to each other;
A rolling method of using a 2-high rolling mill for rolling in a rolling direction in a rolling plane comprising one mill housing, first upper and lower work rolls defining a first gap and second upper and lower work rolls defining a second gap assembled in said mill housing to build up two sets of 2-high cross mills, first drive means for inclining said first and second upper work rolls together, second drive means for inclining said first and second lower work rolls together, a first operation side force applying device and a first drive side force applying device for applying a force to at least one of said first upper and lower work rolls in a direction toward the first gap, and a second operation side force applying device and a second drive side force applying device for applying a force to at least one of said second upper and lower work rolls in a direction toward the second gap;
Dependencies are inferred from the claim text.