Outokumpu Nirosta Gmbh

Thyssenkrupp Nirosta Gmbh

Outokumu Nirosta Gmbh

André d'Hone

René Leenen

A method of rolling metal strip, and in particular steel strip, in which the metal strip passes through the roll gap of at least one roll stand, allows the work rolls of the roll stand which define the roll gap to be able to be shifted along their axes of rotation if differences occur in the shape of the roll gap from its desired shape. The method provides for flat products to be rolled which meet very stringent requirements in respect of their dimensional accuracy. For this purpose, the work rolls are shifted in the same direction in accordance with the invention, following a given shift strategy which is characterized by a regular change in the direction of shift (R&#x2212;, R+) as a function of the reaching of given maximum shifted positions (V, V, V, . . . , V, V, V, V. . . , V).

Method for rolling metal strips, particularly steel strips

A twin roll caster and a method for operating a machine of this type. The machine includes two casting rolls, that delimit a casting gap between them on its longitudinal sides; two side plates that delimit the casting gap on its narrow sides; and at least one oscillation device, which moves the side plate in an oscillating manner about an axis of oscillation, extending substantially axially parallel to the axes of rotation of the casting rolls. Oscillation device includes two actuators, which are articulatedly coupled to the one side plate and each apply a torque rotating about the axis of oscillation on the one side plate, and a control device that emits control signals, upon which the actuators, individually or together with each other, carry out adjustment movements aligned against one another or parallel to one another.

Method and twin roll caster for the production of strip cast from a molten metal

A twin roll caster and method for producing strip cast from a molten metal using the twin roll caster. The twin roll caster has casting rolls which delimit a casting gap between them on its longitudinal sides and narrow sides sealed in each case by a side plate which is moved during the casting operation about an axis of oscillation in an oscillating manner. The inventive method and the twin roll caster enable the risk of operational disruptions from molten mass solidifying in the region of the side plate to be further minimized. This is achieved by changing the position of the axis of oscillation during the casting operation.

A twin roll caster and a method for operating comprising two casting rolls that delimit a casting gap on its longitudinal sides; two side plates that delimit the casting gap on its narrow sides; and at least one axial actuator associated with one of the side plates and impacting the respective side plate on its rear turned away from the front sides of the casting rolls with a force axially aligned toward the casting gap pressing the side plate against the front sides of the casting rolls. An axial actuator acts on the rear side of the side plate by means of a joint provided to adjust an angular offset between the normal level relative to the effective direction of the force applied by the axial actuator to the side plate and the normal level relative to the axes of rotation of the casting rolls.

A method for operating a two-roll casting machine for casting molten metal into cast strip, which machine has two casting rolls which are each rotatively driven in opposite directions about an axis of rotation and between them delimit a casting gap on its longitudinal sides, with side plates that can be placed on the casting rolls, which side plates seal the casting gap on its narrow sides in the casting operation, bridging the casting gap with a refractory material, wherein the side plates are moved during the casting operation in a direction which is aligned parallel to the direction of conveying in which the cast strip leaves the casting gap. With such a method the formation of grooves distorting the casting result and the casting operation can be suppressed with increased certainty and the service life of the side plates can be increased, compared to the prior art.

Growing community of inventors

Krefeld, Germany

André d'Hone