PLATE MILL FOR METAL PLATE MATERIAL

PROBLEM TO BE SOLVED: To provide a mill capable of securing a maximum opening between upper and lower work rolls, exhibiting strong roll bending force, and as a result, applying a highly responsive and strong plate crown shape control function.SOLUTION: The plate mill can roll a metal plate material having a plate width of 2,500 mm or more, and an arm part extending from an upper back-up roll chock is a type for clasping an upper work roll chock. A hydraulic cylinder for loading increased bending force on the upper work roll is arranged in the arm part, a hydraulic cylinder for loading increased bending force on the lower work roll is arranged in a projecting block, and a hydraulic cylinder for loading decreased bending force on the upper work roll is arranged inside the upper back-up roll chock.