Sliding bearings for chocks in rolling mill stands with crossed displacement of the rolls under load

摘要

Sliding bearings for chocks (11) in back-up rolls (12) under load, the back-up rolls (12) cooperating with the respective working rolls (112) and being able to perform crossed displacement in a four-high rolling mill stand for the hot rolling of sheet and/or large plate, the chocks (11) cooperating on the outside with organs to transmit the load from the rolls to the stationary housing (21) and organs to regulate the gap between the working rolls (112), these organs comprising millscrews, hydraulic capsules (13), spacers, etc., the bearings comprising a hydrostatic bearing (10a) comprising one or more hydrostatic chambers or pockets (14), opening onto their lower surface, to contain and limit the liquid, the hydrostatic chambers or pockets (14) being separated at the sides by limiting walls (22), the hydrostatic chambers or pockets (14) and the limiting walls (22) defining a clearance (19) with respect to the upper face of the relative chock (11), the clearance (19) being able to be filled with fluid which has a pressure functional to the current work step of the rolling stand.