Sliding bearings for chocks in rolling mill stands with...

B - Operations – Transporting – 21 – B

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Details

B21B 35/00 (2006.01) B21B 13/02 (2006.01) B21B 31/02 (2006.01) B21B 31/22 (2006.01)

Patent

CA 2208696

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.

Appuis à glissières d'empoises (11) de cylindres d'appui (12) sous charge, ces cylindres d'appuis (12) étant solidaires de cylindres de travail (112) qui leur correspondent et pouvant effectuer un déplacement transversal dans une cage de laminoir quarto pour les besoins du laminage à chaud de tôles et/ou de tôles fortes de grande dimension, les empoises (11) étant solidaires à l'extérieur d'organes permettant de transmettre la charge entre les cylindres et le logement stationnaire (21) et avec des organes servant à réguler l'écartement entre les cylindres de travail (112), ces organes comportant notamment des vis à tête moletée, des capsules hydrauliques (13), des pièces intercalaires, et les appuis étant constitués d'un palier hydrostatique (10a) muni d'une ou de deux chambres ou poches hydrostatiques (14), avec une ouverture du côté de leur surface inférieure, pour contenir et limiter le liquide, ces chambres ou poches hydrostatiques (14) étant séparées latéralement l'une de l'autre par des parois de délimitation (22) définissant une ouverture (19) au niveau de la face supérieure de l'empoise correspondante (11), cette ouverture (19) pouvant être remplie d'un liquide dont la pression est fonction de l'étape de travail de la cage de laminoir.

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