| 摘要 |
The present invention relates to an apparatus for adjusting the upper edge of a lower work roll of a four high rolling stand to the rolling line. In particular, the apparatus has a horizontally displacable lower wedge element having a stepped sloped upper surface and a vertically displacable upper wedge element positioned underneath the chock of the lower back-up roll. This upper wedge element has a stepped sloped lower surface corresponding to and resting on the stepped sloped upper surface of said lower wedge element. A lift device is used for lifting the upper wedge element and the chock along the vertical axis so that the lower wedge element can be horizontally positioned. Thereafter, the upper wedge element and the chock are lowered onto the lower wedge element, thereby adjusting the upper edge of the lower roll in the roll stand to the roll line. Preferably, a cross member is positioned between the vertically displacable upper wedge element and the chock with the lift device being attached to the cross member. Thus, the cross member, the upper wedge element and the chock can all be moved along vertical axis. By the use of an I-shaped cross member, lift devices such as hydraulic piston cylinder units, can be positioned outside the path of displacement of the lower wedge elements.
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