Continuously operating strip casting and rolling system
A continuously operating casting and rolling system with a strip tension control includes a casting unit having a melt-containing feed vessel with a horizontal casting channel and a discharge region in the form of a casting nozzle, and a primary cooling zone with two guide rolls and a circulating cooled casting strip and at least one downstream rolling unit having at least two drivable rollers. In order to minimize the tension on the cast strip, the casting unit and the subsequent rolling unit are mechanically decoupled, wherein for the decoupling at least one driver unit having at least two drivable rollers for driving the strip is arranged between the casting belt and the rolling unit.
1. A continuously operating strip-casting and rolling system with strip tension control for a strip, comprising:
a casting unit having a melt-containing feed vessel with a horizontally disposed casting trough and a discharge area having a tachometer connected therewith used to measure the discharge speed of the strip, or used as a mini-looper, the discharge area configured as a casting nozzle and a primary cooling zone comprising two guide pulleys and a revolving cooled casting belt, and at least one downstream rolling unit comprising at least two drivable rollers,
at least one driver unit comprising at least two further drivable rollers arranged between the casting belt and the at least one downstream rolling unit for driving the strip, wherein the at least one driver unit mechanically decouples the casting unit and the at least one downstream rolling unit so as to minimize tension applied to the strip, and
a lifting device interconnected between the at least one driver unit and the at least one downstream rolling unit, said lifting device lifting the strip for decoupling the at least one driver unit and the at least one downstream rolling unit
wherein the at least one driver unit is eccentrically mounted for rotation, wherein the at least two further drivable rollers are during a casting and rolling process displaceable substantially parallel to a longitudinal axis of the strip in a direction identical to a casting direction or in opposition to the casting direction.
2. The device of claim 1 , wherein the at least one driver unit is arranged in a frame and the individual driver units are supported against the frame by way of force measuring devices.
3. The device according to claim 1 , wherein drives that drive the casting belt and drives that drive the at least one driver unit are mechanically coupled.
4. The device of claim 3 , wherein the drives that drive the casting belt and the drives that drive the at least one driver unit are mechanically coupled by way of a superposition gear.
5. The device of claim 3 , wherein the drives that drive the casting belt and the drives that drive the at least one driver unit comprise direct current motors.
6. The device according to claim 1 , wherein the lifting device is constructed as a self-cushioning unit.
7. The device according to claim 6 , wherein the self-cushioning unit is a pneumatic cylinder.
8. The device of claim 1 , wherein the at least two drivable rollers of the rolling unit comprise shock absorbers configured to cushion a touchdown on the strip.
9. The device of claim 8 , wherein the shock absorbers are adjustable hydraulic shock absorbers configured to be switched off.