Method and twin roll caster for the production of strip cast from a molten metal
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.
1. A twin roll caster comprising:
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 is/are associated with one of the side plates and rotates the one side plate, during the casting process, in a rotational oscillating manner about an axis of oscillation extending substantially axially parallel to the axes of rotation of the casting rolls, wherein the at least one oscillation device comprises:
two actuators, which, are articulatedly coupled to the one side plate and, during operation, each applying 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.
2. The twin roll caster according to claim 1 , wherein joints, by which the actuators are coupled to the side plate, are arranged on different sides of the axis of oscillation.
3. The twin roll caster according to claim 1 , wherein effective directions of force of the actuators are aligned parallel to one another.
4. The twin roll caster according to claim 1 , wherein effective directions of force of the actuators are aligned vertically.
5. The twin roll caster according to claim 1 , wherein the respective actuator is configured as an adjusting cylinder.
6. The twin roll caster according to claim 5 , wherein the adjusting cylinder operates hydraulically.
7. The twin roll caster according to claim 6 , wherein the adjusting cylinder is supported hydrostatically.
8. The twin roll caster according to claim 1 , wherein the actuators stand firmly on a substrate on which the twin roll caster is supported.
9. The twin roll caster according to claim 1 , wherein at least one of the actuators is coupled to the side plate by a coupling device to compensate for an angular offset or a length variation.
10. The twin roll caster according to claim 9 , wherein the coupling device comprises a flexible and elastic connecting link, by which the respective actuator is coupled to the side plate.
11. The twin roll caster according to claim 9 , wherein the coupling device comprises a linear guide, which permits an additional relative movement between the side plate and the respective actuator at least in one direction transverse to the axis of oscillation and to an adjustment direction of the actuator.
12. A method for operating a twin roll caster configured according to claim 1 , wherein the actuators, as a function of the wear pattern existing on the respective side plate, are optionally operated individually or together.
13. The method according to claim 12 , wherein in the event of an individual operation of one actuator, the other actuator is arrested, so that it forms a counter bearing for the movements, performed thereupon by the respective side plate.
14. The method according to claim 12 , wherein the respective side plate, as a function of the wear pattern existing on it in each case, is lowered in the casting direction by the actuators.
15. The method according to claim 14 , wherein the lowering is in stages and is performed moving back and forth in a pendulum fashion between two turning points of oscillation of the respective side plate.