Voest-alpine Industrieanlagenbau Gmbh

Trumpf Maschinen Austria Gmbh & Co Kg

Mannesmann Rexroth Ag

General Electric Company

Bosch Rexroth Ag

Voest-alpine Industrieanlagenbau Gesellschaft M.b.h.

Primetals Technologies Austria Gmbh

Rudolf Scheidl

Kurt Engel

Peter Ladner

Karl Ladner

Gerald Riha

Helmut Fitzel

Karl M&ouml;rwald

Reinhard Brandstetter

Herbert Kopecek

Siegfried Silber

Wolfgang Amrhein

Reinhard Hargassner

Jörg Dantlgraber

Simone Pratesi

Michael Bernhard Schmitz

Franco Graziani

Paolo Battagli

Francesco Grillo

Bernd Winkler

Philipp Wieser

Dietmar Schindler

Thomas Fuernhammer

Werner Leitner

Helmut Holl

Siegfried Grammer

Michael Garstenauer

Horst Furhofer

Horst F&uuml;rhofer

Heino Försterling

Bernhard Karl Steiner

Thomas Feichtner

Bart Jan Olmi

Markus Resch

Helmut Wahl

René Stellnberger

Stefan Woess

Markus Mairhofer

A drive device for a bending press, in particular a press brake, with a press frame includes a stationary press beam and has a press beam which can be displaced relative to the press beam by a beam adjusting device formed by a closed hydraulic system including a hydraulic pump with a controllable drive motor, at least one control valve and at least one hydraulic linear actuator. The linear actuator includes a first piston arrangement with a first piston dividing a cylinder chamber into a first pressure chamber and a second pressure chamber and, in another cylinder chamber, a second piston arrangement with another piston and at least one other pressure chamber. The first piston arrangement and the second piston arrangement are coupled with one another.

Drive device for a bending press

The invention relates to a drive device () for a bending press, in particular a folding press (), comprising a press frame (), a press table () and a press beam () that can be adjusted relative to the press table () via a hydraulic system () comprising a hydraulic pump (), controlled drive motor (), switch and control means and pressure lines and at least one pressure cylinder () which can be supplied with at least one pressure medium. The hydraulic system () forms a closed system together with a ring line () comprising the hydraulic pump (), control valves () and a pressure store (). The ring line comprises a first line section () between a pressure chamber () of the pressure cylinder () and the hydraulic pump () and a second line section () between an additional pressure chamber () of the pressure cylinder () and the hydraulic pump (). The pressure store () can optionally be in fluid connection via at least one of the control valves () with the first line section () or the second line section () to take up or release a storage volume of the pressure medium.

A valve comprises an electromagnetic actuator including a solenoid. The solenoid includes at least one core and an anchor plate. The solenoid further comprises at least one coil disposed within the core and connected to a set of power electronics to supply current to the coils. The actuator further comprises a plunger connected to the anchor plate and at least one spring configured to guide the plunger. The actuator also includes a pressure compensation system. The opening and closing of the valve is controlled by passing current through the coil.

Electromagnetic actuators

An on-off valve is disclosed, especially a fast-acting on-off valve, wherein a plunger is pretensioned in a base position. The plunger has a plurality of parallel control edges via which a plurality of sectional opening cross-sections, arranged in parallel in a hydraulic manner, can be jointly actuated to open or close when the valve is switched.

On-off valve

In a strand guide for a continuous casting plant comprising a plurality of strand supporting elements for supporting the strand, in particular support segments carrying supporting rollers, several support segments being fastened adjacent each other on a supporting framework designed in one piece in its longitudinal extension, each support segment is fastened to the supporting framework by a fixed bearing and a movable bearing spaced apart therefrom in the longitudinal extension of the strand guide, each support segment, by at least one bearing, is pivotally mounted to the supporting framework so as to be pivotable about an axis, the axis being oriented transversely with respect to the longitudinal extension of the strand guide and horizontally, as well as in a vertical plain passing through the longitudinal extension of the supporting framework and by at least one bearing is mounted so as to be adjustable with respect to the supporting framework in a direction toward the pivoting movement of the support segment. For simple adjustment of the correct position of the support segments, a measuring device for detecting the pivoting movement of the support segment, preferably a position sensor or an angle measuring device, is provided which, via a controller, is coupled with an adjusting device for adjusting the position of the support segment.

Billet-guiding system for a continuous casting plant

An adjustment device for adjusting the position of at least one strand supporting element (,) relative to a supporting stand (,) carrying at least one further strand supporting element (,), of a strand guide in a continuous casting plant comprises at least one hydraulic adjustment cylinder (,) contacting a strand supporting element (,) directly or indirectly on the one side and the supporting stand (,) carrying a further strand supporting element (,) on the other side, the movement of the strand supporting element (,) being detectable via a position sensor (,) and controllable by means of an automatic controller (,). In order to safely attain the high precision in positioning the strand supporting elements (,) sought for a strand guide at yet a minimum expenditure and a minimum susceptibility to failure, at least one directional control valve (,A,,B) capable of being switched via a three-level controller (,) is provided for actuating the hydraulic adjustment cylinder (,) FIG.,.

Adjusting device for setting the position of billet-support elements

Hydrostatic drive control device

Device for actuating a hydrostatic drive

With a continuous casting mold, the mold side walls each are formed by a supporting wall and an internal plate fastened thereto and getting into contact with the metal melt. On the side of the internal plate facing the supporting wall parallely arranged coolant channels are provided, which are designed as slits open towards the supporting wall and whose width is smaller and whose depth is larger, than the width of the ribs located between the slits. In order to render the cooling performance particularly effective, the width of the cooling ribs is smaller than, or equal to, 13 mm and the flow speed of the coolant is adjusted such that the heat transmission coefficient alpha between the internal plate and the coolant is between 20 and 70 kW/m.sup.2 K, preferably between 25 and 50 KW/m.sup.2 K, such that the heat flow density for the internal plate is larger than the heat flow density for a smooth internal plate having no ribs.

Continuous casting mold arrangement

Growing community of inventors

Erlauf, Austria

Rudolf Scheidl