Patent ID: 8099990

Claim:
A changing device for changing the height of a roll in a roll stand, wherein the roll stand comprises: a pair of spaced apart roll stand uprights arranged in parallel, a roll having a pair of roll chocks thereon, the roll chocks being supported on the uprights and the roll thereby being supported by and between the uprights; the changing device for changing the roll height comprising: a wedge adjusting device for bringing the roll into line with a rolling line, the wedge adjusting device comprising: each of the roll chocks being supported on a respective one of the stand uprights for guiding the roll chocks with adjustable height on the uprights; a roll changing device operable for changing the roll height on the uprights, the roll changing device is movable in the longitudinal direction of the roll; a respective upper pressure plate supported on the roll changing device and disposed below a part of the respective chock; a lower pressure plate supported on the stand upright below the upper pressure plate; an adjusting wedge movable in a space between the upper and lower pressure plates, the adjusting wedge is wedge-shaped in the longitudinal direction of the roll and is displaceable in the longitudinal direction of the roll and with respect to the stand uprights and the pressure plates, the wedge has a continuously planar wedge surface area toward at least one of the pressure plates; a wedge displacing device connected to the adjusting wedge and operable for displacing the wedge along the longitudinal direction of the roll for selectively causing the wedge to press on the upper pressure plate and raise the chock as the wedge moves to one wedge position or to not support the chock as the wedge moves toward another wedge position so that the chock seats on the roll changing device in the other wedge position; a clamping device for fixing the adjusting wedge at a position along the longitudinal direction of the roll; the wedge adjusting device is structurally separate from the roll changing device; and the upper pressure plate is vertically and horizontally guided in the roll changing device.