Casting stand control system with radius roll feedback and method of use

Patent metadata

Field	Value
Publication number	US-10850322-B2
Application number	US-201816175383-A
Country	US
Kind code	B2
Filing date	Oct 30, 2018
Priority date	Oct 30, 2017
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

Feedback is captured and monitored from a radius roll, an upstream rolling unit, and a downstream rolling unit within a casting stand in order to control steel strand casting. The stability of the radius roll is determined, and in response the load share between the downstream unit and the upstream unit is adjusted. When the stability of the radius roll has not changed for a period of time, it may indicate that the steel strand is sagging, and in response the load share of the downstream unit versus the upstream unit is increased. Alternatively, when the stability of the radius roll becomes unstable, such as when the speed of the radius roll is changing, decreasing, or is less than a casting speed, the steel strand may be lifting off of the radius roll, and in response the load share of the downstream unit versus the upstream unit is decreased.

First claim

What is claimed is:

1. A method of controlling a casting process, the method comprising:
receiving feedback from a radius unit within a casting stand wherein receiving the feedback from the radius unit comprises receiving an indicator of movement of a radius roll of the radius unit;
monitoring the feedback from the radius unit wherein the monitoring of the feedback from the radius roll comprises identifying stability of the radius roll; and
adjusting an upstream unit or a downstream unit based on the monitoring of the feedback received from the radius unit, wherein the radius unit is located between the upstream unit and the downstream unit, and wherein adjusting the upstream unit or the downstream unit comprises:
identifying that the stability of the radius roll remains unchanged for a first time period, and increasing a load share of the downstream unit compared to the upstream unit; or
identifying that the stability of the radius roll changes for a second time period or a speed of the radius roll is less than a casting speed, and decreasing the load share of the downstream unit compared to the upstream unit.

2. The method of claim 1 , wherein the stability is a change in speed of the radius roll.

3. The method of claim 1 , wherein the stability of the radius roll remains unchanged for the first time period and the load share of the downstream unit compared to the upstream unit is increased.

4. The method of claim 3 , wherein increasing the load share comprises increasing a downstream current to a downstream motor of the downstream unit or decreasing an upstream current to an upstream motor of the upstream unit.

5. The method of claim 1 , wherein the stability of the radius roll changes for the second time period or the speed of the radius roll is less than the casting speed and the load share of the downstream unit compared to the upstream unit is decreased.

6. The method of claim 5 , wherein decreasing the load share comprises decreasing a downstream current to a downstream motor of the downstream unit or increasing an upstream current to an upstream motor of the upstream unit.

7. The method of claim 1 , wherein the feedback received from the radius unit is received through a movement sensor operatively coupled to the radius roll of the radius unit that measures a movement of the radius roll.

8. The method of claim 1 , wherein the receiving, the monitoring, and the adjusting occur through a control system, wherein the control system comprises:
one or more memory devices having computer readable program code stored thereon; and
one or more processing devices operatively coupled to the one or more memory devices, wherein the one or more processing devices are configured to execute the computer readable program code to perform the receiving, the monitoring, and the adjusting.

9. The method of claim 1 , wherein the first time period and the second time period are the same amount of time.

10. A control system for a casting stand, the control system comprising:
one or more memory devices having computer readable program code stored thereon; and
one or more processing devices operatively coupled to the one or more memory devices, wherein the one or more processing devices are configured to execute the computer readable program code to:
receive feedback from a radius unit within the casting stand, wherein receiving the feedback from the radius unit comprises receiving an indicator of movement of a radius roll of the radius unit;
monitor the feedback from the radius unit, wherein the monitoring of the feedback from the radius roll comprises identifying stability of the radius roll; and
adjust an upstream unit or a downstream unit based on the monitoring of the feedback received from the radius unit, wherein the radius unit is located between the upstream unit and the downstream unit, and wherein adjusting the upstream unit or the downstream unit comprises:
identifying that the stability of the radius roll remains unchanged for a first time period, and increasing a load share of the downstream unit compared to the upstream unit: or
identifying that the stability of the radius roll changes for a second time period or a speed of the radius roll is less than a casting speed, and decreasing the load share of the downstream unit compared to the upstream unit.

11. The control system of claim 10 , wherein the stability is a change in speed of the radius roll.

12. The control system of claim 10 , wherein the stability of the radius roll remains unchanged for the first time period and the load share of the downstream unit compared to the upstream unit is increased.

13. The control system of claim 12 , wherein increasing the load share comprises increasing a downstream current to a downstream motor of the downstream unit or decreasing an upstream current to an upstream motor of the upstream unit.

14. The control system of claim 10 , wherein the stability of the radius roll changes for the first time period or the speed of the radius roll is less than the casting speed and the load share of the downstream unit compared to the upstream unit is decreased.

15. The control system of claim 14 , wherein decreasing the load share comprises decreasing a downstream current to a downstream motor of the downstream unit or increasing an upstream current to an upstream motor of the upstream unit.

16. A casting system, the system comprising:
an upstream unit;
a downstream unit;
a radius unit comprising a radius roll and a movement sensor, wherein the radius unit is located between the upstream unit and the downstream unit; and
a control system operatively coupled to the upstream unit, the downstream unit, and the radius unit;
wherein the control system receives feedback from the movement sensor of the radius unit related to an indicator of movement of the radius roll of the radius unit, monitors the feedback from the radius unit by identifying stability of the radius roll, and adjusts the upstream unit or the downstream unit based on the monitoring of the feedback received from the radius unit, and wherein adjusting the upstream unit or the downstream unit comprises:
identifying that the stability of the radius roll remains unchanged for a first time period, and increasing a load share of the downstream unit compared to the upstream unit; or
identifying that the stability of the radius roll changes for a second time period or a speed of the radius roll is less than a casting speed, and decreasing the load share of the downstream unit compared to the upstream unit.

17. The casting system of claim 16 , wherein the stability is a change in speed of the radius roll for the first time period, and the load share of the downstream unit compared to the upstream unit is increased.

18. The casting system of claim 17 , wherein increasing the load share comprises increasing a downstream current to a downstream motor of the downstream unit or decreasing an upstream current to an upstream motor of the upstream unit.

19. The casting system of claim 16 , wherein the stability is a change in speed of the radius roll changes for the first time period or the speed of the radius roll is less than the casting speed, and the load share of the downstream unit compared to the upstream unit is decreased.

20. The casting system of claim 19 , wherein decreasing the load share comprises decreasing a downstream current to a downstream motor of the downstream unit or increasing an upstream current to an upstream motor of the upstream unit.

Assignees

• Nucor Corp

Inventors

• Adkins Rodney Ray

Classifications

• B22D11/20

  for removing cast stock · CPC title

• B22D11/16 Primary

  Controlling or regulating processes or operations · CPC title

• G05B6/02

  electric · CPC title