Sms Group Gmbh

Sms Meer Gmbh

Norbert Theelen

Peter Thieven

Mark Haverkamp

Walter Kirchner

Alexander Gohr

Walter Hoeffgen

Walter Hoffgen

Helge Dähndel

Walter Höffgen

Susanne Zeller

A rolling mill, in particular a rolling mill having more than one mill stand, includes at least two rolls which are mounted in a roll bearing in a mill stand to absorb rolling forces, movers for moving at least one roll relative to the mill stand as well as determining devices for determining the roll pass, the determining device having a pass reference and a spatial reference as well as a measuring device for measuring the relative position between the pass reference and the spatial reference. At least one of the pass reference and the spatial reference is arranged peripherally in relation to the power flow occurring between the roll and the mill stand.

Rolling mill and rolling method

In order to improve the quality of pipe-like work pieces, a rolling mill has at least two successive consecutive rolling stages that have mandrel rods. A threading line for the mandrel rod of the second rolling stage can lie on an extraction line for the mandrel rod of the first rolling stage. The same advantage can be achieved in a rolling method for the production of pipe-like work pieces, comprising at least two successive consecutive rolling stages, wherein the two rolling stages perform the rolling with the use of mandrel rods. The work piece is brought from the mandrel rod of the first rolling stage onto the mandrel rod of the second rolling stage, without entirely emptying an interior of the work piece and/or without changing the direction of movement of the work piece or braking the work piece in the meantime and accelerating it once again.

Disclosed is a rolling mill, in particular a rolling mill having more than one mill stand, comprising at least two rolls () which are mounted in a roll bearing in a mill stand to absorb rolling forces, further comprising means () for moving at least one roll relative to the mill stand as well as means () for determining the roll pass, the determining means having a pass reference () and a spatial reference () as well as means () for measuring the relative position between the pass reference and the spatial reference. In order to create a rolling mill that provides as accurate information as possible about the roll pass, the pass reference and/or the spatial reference is/are arranged peripherally in relation to the power flow occurring between the roll and the mill stand.

The invention relates to a method and a rolling mill for producing a seamless steel pipe in a continuous rolling process, where semi-finished material is first formed into a hollow block () in a rotary rolling mill, said block then being rolled in a multi-tooled continuous rolling mill () over a previously inserted mandrel () to form a tube blank (), wherein the mandrel () receiving the hollow block and held by a mandrel holding and transporting device () disposed on the entry side is fed into the continuous rolling mill () and is transported back to the entry side after the tube blank has been rolled off of the mandrel () on an extracting rolling mill () connected downstream of the continuous rolling mill. An aim of the invention is to allow high production rates at the same product quality, particularly at a low drop in the temperature of the tube blanks. The aim is achieved in that the mandrel () with the tube blank () is released by the entry-side mandrel holding and transporting device () after exiting the last tool () of the continuous rolling mill () and thus is transferred to an accompanying second mandrel holding and transporting device () connected downstream and held by the same until the tube blank () is rolled off by means of the extracting rolling mill ().

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Erkelenz, Germany

Norbert Theelen