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US 12,042,835 B2Granted
Rolling control system and rolling control method
AssigneeTMEIC Corporation
InventorMinoru Tachibana
Life of this patent
Estimating the term…
Abstract
A rolling controller executes speed and tension control, and roll gap and plate thickness control when rolling speed is less than a boundary value, while executing roll gap and plate tension control, and speed and plate thickness control when the rolling speed is equal to or greater than the boundary value. If the rolling speed rises across the boundary value, the rolling controller sets the rolling speed to zero such that a speed correction amount in the speed and tension control before the transboundary is not reflected to a calculation executed in the speed control amount of the rolling speed after the transboundary.
Claims9
A rolling control system comprising:
- a rolling stand;
- and
- a rolling controller configured to execute speed control of which a control operation terminal is speed of a material to be rolled in an entry side of the rolling stand and roll gap control of which a control operation terminal is a roll gap of the rolling stand,
- wherein the rolling controller includes:
- a first plate thickness control part configured to execute roll gap and plate thickness control that is roll gap control to control a plate thickness of the material to be rolled in a delivery side of the rolling stand;
- a second plate thickness control part configured to execute speed and plate thickness control that is speed control to control the plate thickness;
- a first tension control part configured to execute speed and tension control to control a tension of the material to be rolled in the entry side of the rolling stand;
- a second tension control part configured to execute roll gap and plate tension control to control the tension;
- and
- a control selection part configured to select the speed and tension control and the roll gap and plate thickness control if rolling speed is less than a boundary value, while selecting the roll gap and plate tension control and the speed and plate thickness control if the rolling speed is greater than or equal to the boundary value,
- wherein the control selection part is further configured to:
- if the rolling speed rises across the boundary value at a startup of the rolling stand, set a speed correction amount to zero and then output it to the second tension control part such that the speed correction amount in the speed and tension control before a transboundary is not reflected to a calculation executed in the speed control amount of the rolling speed at the transboundary;
- and
- if the rolling speed rises across the boundary value at the startup of the rolling stand, calculate a roll gap correction amount according to the speed correction amount and then output it to the second tension control part such that the speed correction amount is reflected to a calculation of a roll gap control amount executed in the roll gap and plate tension control at the transboundary,
- wherein the control selection part includes:
- a hold circuit configured to store the speed correction amount output in the speed and tension control from the first tension control part;
- a trigger circuit configured to output a trigger signal when the rolling speed is equal to or greater than the boundary value;
- and
- a ramp circuit configured to, when the trigger signal is output from the trigger circuit, calculate the roll gap correction amount according to the speed correction amount based on the speed correction amount output in the speed and tension control at which the trigger signal is output from the trigger circuit.
16 more elements
A rolling control method comprising:
- executing speed control of which a control operation terminal is rolling speed;
- and
- executing roll gap control of which a control operation terminal is a roll gap of a rolling stand,
- wherein the roll gap control includes:
- roll gap and plate thickness control which is the roll gap control to control a plate thickness of a material to be rolled in a delivery side of the rolling stand;
- and
- roll gap and plate tension control which is the roll gap control to control a tension of the material to be rolled in an entry side of the rolling stand,
- wherein the speed control includes:
- speed and tension control which is the speed control to control the tension;
- and
- speed and plate thickness control which is the speed control to control the plate thickness,
- wherein the rolling control method further comprising:
- selecting, if rolling speed of the material to be rolled is less than a boundary value, the speed and tension control and the roll gap and plate thickness control;
- selecting, if the rolling speed is greater than or equal to the boundary value, the roll gap and plate tension control and the speed and plate thickness control;
- setting a speed correction amount to zero, if the rolling speed rises across the boundary value at the startup of the rolling stand, such that the speed correction amount in the speed and tension control before a transboundary is not reflected to a calculation executed in the speed control amount of the rolling speed at the transboundary;
- and
- calculating, if the rolling speed rises across the boundary value at the startup of the rolling stand, a roll gap correction amount according to the speed correction amount such that the speed correction amount is reflected to a calculation of a roll gap control amount executed in the roll gap and plate tension control at the transboundary,
- wherein the rolling control method further comprising:
- storing the speed correction amount output in the speed and tension control;
- and
- outputting a trigger signal when the rolling speed is equal to greater than the boundary value,
- wherein, when calculating the roll gap correction amount according to the speed correction amount, the roll gap correction amount is calculated based on the speed correction amount output in the speed and tension control at which the trigger signal is output.
19 more elements
Dependencies are inferred from the claim text.