Sms Group Gmbh

Sms Meer Gmbh

Walter Kirchner

Paolo Marin

Norbert Theelen

Walter Hoeffgen

Walter Hoffgen

Patrizio Rinaldi

A device for handling mandrel rods in a rolling plant for rolling seamless tubes comprises an inserter. The inserter moves a mandrel rod in a rolling direction such that the mandrel rod, starting from an initial state, is pushed into a tube blank situated upstream of the mandrel rod. A retaining device has a fixing unit that is movable along the rolling line and is designed to temporarily hold the mandrel rod at an action point at a rear end of the mandrel rod and to carry out a working stroke. The mandrel rod can be inserted into the rolling mill in the rolling direction and pulled out of the rolling mill counter to the rolling direction by the retaining device. The retaining device is designed such that the starting position of the fixing unit lies between the two ends of the mandrel rod in the initial state.

Device and method for handling mandrel rods in a tube rolling mill

In order to provide an adjustment of the roll gap under load with high positioning accuracy and regulation accuracy, a cross-rolling unit for adjusting rolls operating under load with, disposed on a force-absorbing roll stand, a mechanical setting unit for a first cross-roll setting and a hydraulic setting unit for a second cross-roll setting, wherein the mechanical setting unit includes two mutually displaceable mechanical subassemblies having a common axis of symmetry and the hydraulic setting unit includes at least two mutually displaceable hydraulic subassemblies having respectively one central axis, has the mechanical setting unit and the hydraulic setting unit disposed in the force-absorbing roll stand as a common subassembly. The axis of symmetry of at least one of the mutually displaceable mechanical subassemblies and the central axes of each of the mutually displaceable hydraulic subassemblies are the same.

Cross-rolling unit and method for adjusting a roll gap

The invention relates to a cross-rolling mill, having a plurality of roll shafts (), each applying a radially directed rolling force to a workpiece, wherein orientation of a roll axis (w) of at least one of the roll shafts () adjustably changes about a first adjustment axis (S) and a second adjustment axis (S), wherein an intermediate member () is arranged between a rotary baring () and a control element (), and wherein the intermediate member () includes a rolling force-transmitting rocker pin () having a spherical surface () that provides for pivotal movement in a plurality of directions.

Cross-rolling mill

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.

Rolling mill and rolling method

A frame of a metal-forming press having upper and lower traverses interconnected by vertical columns having upper and lower ends is provided with respective sets each of a plurality of identical tension bolts at each end of each of the columns. The traverses are formed at each end of each column with an array of throughgoing holes through each of which a respective one of the bolts extends, and the columns have opposite ends each formed with an identical array of blind threaded bores each in turn aligned with a respective one of the throughgoing holes. Each bolt has an inner end seated in a respective on of the bores of the respective column end and an outer end bearing inwardly on a face of the respective traverse.

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Juechen, Germany

Walter Kirchner