Dynamic shifting of reduction (dsr) to control temperature in tandem rolling mills
AssigneeNovelis Do Brasil Ltda
InventorsFrancisco Carvalho, Eduardo Minniti, Carlos Eboli
Life of this patent
Estimating the term…
Abstract
A closed loop temperature control system for use in tandem rolling mills. The closed loop temperature control system uses dynamic information about the temperature of the material moving through the mill to adjust the work rolls to adjust the amount of thickness reduction between the stands to control the temperature of the material as it moves through the mill. In one embodiment, the control system is configured to eliminate or reduce temperature differences across the length of the material as the material moves through acceleration, steady state, and deceleration stages of the rolling process.
Claims20
A system, comprising:
- a first stand comprising a first pair of work rolls for reducing a thickness of a material to a first set point;
- a second stand comprising a second pair of work rolls for reducing the thickness of the material to a second set point;
- and
- a controller coupled to a temperature sensor, the first stand, and the second stand for adjusting at least one of the first set point and the second set point based on a temperature of the material as it exits the second stand.
A method, comprising:
- rolling a material to an inter-stand thickness by a first stand;
- rolling the material to a second thickness by a second stand;
- measuring an exit temperature of the material as it exits the second stand;
- and
- controlling the exit temperature based on the measured exit temperature and a target temperature, wherein controlling the exit temperature includes adjusting the first stand or the second stand.
A system, comprising:
- a first actuator for applying a first force to a first set of work rolls of a first stand, wherein the first force from the first actuator is usable to reduce the thickness of a material passing through the first stand by a first amount;
- a second actuator for applying a second force to a second set of work rolls of a second stand, wherein the second force from the second actuator is usable to reduce the thickness of the material passing through the second stand by a second amount;
- at least one sensor for measuring an exit temperature of the material as the material exits the second stand;
- and
- a controller coupled to the at least one sensor for receiving a measured temperature, wherein the controller is coupled to the first actuator and the second actuator for adjusting the first force applied by the first actuator and the second force applied by the second actuator based on the measured temperature to control the measured temperature.
Dependencies are inferred from the claim text.