Sms Demag Ag

Sms Group Gmbh

Fontaine Engineering Und Maschinen Gmbh

Sms Siemag Aktiengesellschaft

Michael Zielenbach

Holger Behrens

Rolf Brisberger

Walter Trakowski

Bernhard Tenckhoff

Olaf Norman Jepsen

Thomas Daube

Bodo Falkenhahn

Lutz Kümmel

Dominique Fontaine

Pascal Fontaine

Martin Schmidt

Robert Jürgens

Stefan Wendt

Hans-Georg Hartung

Jörn Sohler

Eckart Schunk

Klaus Adolf Frommann

Kerstin Spill

Michael Degner

Heinrich Röse

Gernot Richter

Babak Taleb-Araghi

Frank Bergmann

Peter Horn

Lutz Kummel

A device and a method for rolling a metal strip. A distance of the upper/lower backup roll at at least one point thereof from a predetermined upper/lower reference point is measured by an upper/lower sensor and the measured values of the sensors are sent to a control device. A strain of the roll stand is calculated using a mathematical model, taking into account the rolling force generated. By the control device, an absolute value of the roll gap and thus the resulting thickness of the rolling stock is determined by the control device on the basis of the measured positions of the backup rolls and the calculated strain of the roll stand.

Device and method for rolling a metal strip

An apparatus for treating a metal strip after it has exited from a coating container with a liquid coating material, for example zinc is provided. The apparatus includes a blow-off device arranged above the coating container having an air outlet gap for blowing off excess parts of the still liquid coating material from the surface of the metal strip after the passing of the metal strip through the coating container. An electromagnetic stabilizer is arranged above the blow-off device and has a plurality of individual magnets for stabilizing the metal strip after leaving the coating container and the blow-off device. In order to further increase the efficiency of the apparatus, at least some of the magnets of the stabilizer are formed as pot magnets with pot coils.

Apparatus for treating a metal strip including an electromagnetic stabilizer utilizing pot magnets

A hydraulic control loop controls a hydraulic adjusting cylinder. The cylinder has a cylindrical housing and a displaceable piston therein. The piston divides the housing interior into a first and a second hydraulic chamber. A first hydraulic valve supplies the first hydraulic chamber with hydraulic fluid. A hydraulic pressure of the first hydraulic chamber is adjustable by controlling the first hydraulic valve. A second hydraulic valve supplies the second hydraulic chamber with hydraulic fluid. A hydraulic pressure of the second hydraulic chamber is adjustable by controlling the second hydraulic valve. A control device controls the two hydraulic valves. In a position control state, the second hydraulic valve is controlled by a position control signal dependent on the working position of the piston and the first hydraulic valve is controlled by an adjusted position control signal, that is generated on the basis of the position control signal.

Control of hydraulic actuating cylinders in roll stands

The invention relates to a method for coating a metal strip with the aid of a coating device. Within the coating device, the strip first runs through a coating container with a liquid coating agent and then a stripping nozzle device for stripping off excess coating agent from the surface of the strip. After the stripping nozzle device, the strip typically runs through a strip stabilizing device with a plurality of magnets on both broad sides of the strip. A form control deviation is determined as the difference between a determined actual form of the strip and a specified desired form of the strip and this form control deviation is used for activating the magnets of the strip stabilizing device in order to transform the actual form of the strip into the desired form. As an alternative possibility for producing a moment, in particular a bending moment, in the strip, on the basis of the form control deviation the magnets of the strip stabilizing deviceare moved in the widthwise direction R of the stripinto a traversing position in relation to the magnets on the respectively opposite broad side of the strip.

Method and coating device for coating a metal strip

An adjusting cylinder quick-action adjustment for a long, rapid stroke movement in an edging stand which includes an edger upright, adjustment system, balancing system and edging roll sets, comprises a piston which acts via edging roll chocks of at least one edging roll for adjustment against the rolling stock. The adjustment of the edging roll can be actuated on each side hydraulically by a fluid. The adjusting cylinder quick-action adjustment is mounted in the edger upright and exerts the force required for the edging process. The adjusting cylinder quick-action adjustment includes on each side of the edging upright at least one double cylinder which has two cylinders coupled to one another and is separately controllable and configured for rapid adjustment and for control adjustment of the edging roll.

Quick-action adjustment for adjusting cylinder in edging stands

A method for operating a coating device for coating a metal strip. The corresponding coating device has an electromagnetic strip-stabilizing device having a plurality of electromagnetic actuators or coils for applying forces to the metal strip. In order to ensure that the strip-stabilizing device is operated only within the operating limits thereof, the magnitudes of the set currents for the actuators or the coils are compared with a specified current threshold value or the forces applied to the metal strip by the actuators are compared with a specified force threshold value and the correction roller is moved into such an adjustment position that the magnitudes of the set currents are below the current threshold value or the magnitudes of the forces are below the force threshold value.

Method for operating a coating device for coating a metal strip, and coating device

The invention relates to a device for hot-dip coating a metal strand (), especially a steel strip, in which the metal strand () is vertically guided through a container () accommodating the molten coating metal () and through a guide channel () disposed upstream thereof. The inventive device comprises at least two inductors () disposed at both sides of the metal strand () in the area of the guide channel () that are used to generate an electromagnetic field for retaining the coating metal () in the container (), and at least one sensor (') for detecting the position (s) of the metal strand () in the area of the guide channel (). In order to simplify and render more precise the detection of the position of the metal strand in the guide channel, the sensor for detecting the position of the metal strand () consists of two coils (&#x2032;) that are disposed, when seen from the direction of conveyance (R) of the metal strand (), within the height (H) of the inductors () between the inductors () and the metal strand (). The invention further relates to a method for hot-dip coating a metal strand.

Method and device for hot-dip coating a metal strand

The invention relates to a method for hot-dip coating a metal strand (), especially a steel strip, according to which the metal strand () is vertically guided through a container () accommodating the molten coating metal () and through a guide channel () disposed upstream thereof. An electromagnetic field is generated in the area of the guide channel () by means of at least two inductors () disposed at both sides of the metal strand () to retain the coating material () in the container (). In order to stabilize the metal strand () in a center position in the guide channel (), an electromagnetic field, superimposing the electromagnetic field of the inductors (), is generated by means of at least two additional coils () disposed at both sides of the metal strand (). In order to improve efficiency of the control of the metal strand in the guide channel, the center position of the metal strand () in the guide channel () is stabilized in a closed control loop by carrying out the following steps: a) detecting the position (s, s', s&#x2033;) of the metal strand () in the guide channel (); b) measuring the induced current (I) in the inductors (); c) measuring the induced current (I) in the additional coils (); d) influencing the induced current (I) in the additional coils () depending on the parameters (s, I, I) measured in steps a) to c), in order to maintain the metal strand () in a center position in the guide channel (). The invention further relates to a device for hot-dip coating a metal strand.

The invention relates to a device for hot-dip coating a metal bar (), particularly a steel strip, in which the metal bar () is vertically directed through a container () receiving the molten coating metal () and a directing channel () that is arranged upstream thereof. Said device comprises at least two inductors () which are disposed on both sides of the metal bar () in the zone of the directing channel () and generate an electromagnetic field for retaining the coating metal () within the container (). In order to better control the coating process, the inventive device is characterized by a sealing means (') which is arranged above the directing channel () in the bottom area () of the container () and alternatively releases or interrupts the flow of molten coating metal () to the metal bar () and/or the directing channel ().

Device for hot-dip coating a metal bar

The invention relates to a device for hot dip coating a metal bar (), especially a steel strip, in which the metal bar () is directed vertically through a container () accommodating the molten coating metal () and through a guide channel () mounted upstream thereof. The inventive device comprises at least two inductors () which are arranged on both sides of the metal bar () in the area of the guide channel () and generate an electromagnetic field for retaining the coating metal () inside the container (). In order to relax the coating bath, the distance (d) between the walls () that delimit the guide channel () is not kept constant in a direction (N) extending perpendicular to the surface of the metal strip () in the zone (H) of the vertical extension of the guide channel (), which is located between the bottom side () thereof and the bottom area () of the container ().

Device for hot dip coating a metal strip

The invention relates to a device for hot dip coating metal strands (), particularly strip steel, in which the metal strand () can be vertically guided through a reservoir (), which accommodates the molten coating metal (), and though a guide channel () connected upstream therefrom. An electromagnetic inductor () is mounted in the area of the guide channel () and in order to retain the coating metal () inside the reservoir (), can induce induction currents in the coating metal () by means of an electromagnetic blocking field. While interacting with the electromagnetic blocking field, said induction currents exert an electromagnetic force. In order to prevent an intense heating of the metal strand caused by the electromagnetic inductor, the invention provides that the inductor () is connected to electric power supply means () that supply the inductor with an alternating current whose frequency (f) is less than 500 Hz. In particular, a mains frequency of 50 Hz is intended.

Device for hot dip coating metal strands

The invention relates to a device for hot dip coating metal strand (), particularly strip steel, in which the metal strand () can be vertically guided through a reservoir (), which accommodates the molten coating metal (), and though a guide channel () connected upstream therefrom. An electromagnetic inductor () is mounted in the area of the guide channel () and in order to retain the coating metal () inside the reservoir (), can induce induction currents in the coating metal () by an electromagnetic traveling field. While interacting with the electromagnetic traveling field, the induction currents exert an electromagnetic force. The inductor () has at least two main coils () that are arranged in succession in movement direction (X) of the metal strand (), and has at least two correction coils () for controlling the position of the metal strand () inside the guide channel () in direction (N), which is normal to the surface of the metal strand (). These correction coils are also arranged in succession in movement direction (X) of the metal strand (). In order to improve the efficiency of the control of the metal strip inside the guide channel, the invention provides that at least a portion of the correction coils (), when viewed in movement direction (X) of the metal strand (), are arranged so that they are offset with regard to one another perpendicular to movement direction (X) and perpendicular to direction (N) that is normal to the surface of the metal strand ().

Growing community of inventors

Siegen, Germany

Michael Zielenbach