Sms Schloemann-siemag Aktiengesellschaft

Klockner-humboldt-deutz Ag

Bernd Onderka

Georg Engel

Hugo Feldmann

Alexandr Svagr

Hans-Heinrich Hartmann

Franz Engelberg

Paul Josef Mauk

Rudolf Pflanz

Peter Koethe

Richard Breisinger

In the heat treatment of heat treatable material in an industrial furnace, in particular for the annealing of annealable material such as, for example, aluminum strip wound into a coil (1), by means of blowing of the annealable material with hot gas jets (8) issuing from nozzles (7), in order to insure a very good and uniform heat transfer from the hot gas stream to the material and a completely uniform temperature distribution in the coil (1), and also the rapid heating thereof, without any need to fear locally partial overtemperatures in the coil, it is proposed in accordance with the invention to move the annealable material such as, for example, the coil (1), and the hot gas jets (8) relative to one another, for example by means of the fact that the coil (1) and/or the hot gas nozzles (7) are rotated about the coil axis, so that the blowing impingement points of the hot gas jets (8) move on the blown surface of the annealable material and all desired portions there can be swept in controlled fashion.

Method and device for the heat treatment of heat treatable material in

A workpiece is advanced through a succession of universal roll stands each having a pair of rotatably positively driven horizontal rolls engaging horizontal surfaces of the workpiece and a pair of idling vertical rolls engaging vertical surfaces of the workpiece and normally only rotationally entrained by engagement with the advancing workpiece. The roll stand is controlled by detecting the peripheral speeds of the vertical rolls and generating outputs corresponding thereto and then comparing the outputs to set points and generating error signals corresponding to the difference. The peripheral speed and position of the horizontal rolls are detected to establish same as operating characteristics. Finally the peripheral speeds of the vertical rolls are varied in accordance with the respective differences by varying at least one of the operating characteristics. Such variation is done by changing the crosswise position and/or the peripheral speed of the horizontal rolls, as the vertical/horizontal speed ratio is affected both by amount of vertical compression and amount of tension in the workpiece.

Universal roll stand and method of operating same

To avoid impacts on the first pass of the rolled product through a universal rolling mill the vertical rolls of the rolling mill can be provided with their own integral drive according to our invention. In an electrical drive for a vertical roll the vertical roll is the rotor of an electric motor while the stator is a circular collar on a nonrotatable supporting axle for the vertical roll. In a hydraulic drive for a vertical roll a hydraulic motor is either located in a housing side extension of the structural member supporting the vertical roll to drive it from the outside by spur wheel gearing or by a frictional drive or the hydraulic motor is mounted in the nonrotating supporting axle of the vertical roll and engages on an inner cogged drive ring on the vertical roll from the inside by spur gearing positioned on a transverse plane.

Drive apparatus for the vertical rolls of a universal rolling mill stand

Growing community of inventors

Korschenbroich, Germany

Bernd Onderka