Control system, control method, control device, and program

A control method of casting and rolling equipment including a twin roll-type continuous casting machine, a rolling mill that rolls a steel sheet with a pair of rolling rolls, a conveyor that conveys the steel sheet in a direction of the rolling mill with a pair of conveyance rolls, a rolling mill control unit that controls the rolling mill by any one of controls including a rolling control of rolling the steel sheet with a set roll gap and an open control that performs a control such that at least one of the pair of the rolling rolls does not contact the steel sheet, a conveyor control unit that controls the conveyor by any one of controls including a tension control that conveys the steel sheet at set tension of the steel sheet and a speed control that conveys the steel sheet at a set rotation speed of the conveyance rolls, in which the twin roll-type continuous casting machine includes a pair of casting rolls that rotates in directions opposite to each other, the pair of the casting rolls cools molten steel injected into an upper pouring basin between the pair of the casting rolls and pressure-contacts the cooled and solidified molten steel to discharge the steel sheet from between the pair of the casting rolls, and the conveyor conveys the steel sheet discharged from the twin roll-type continuous casting machine in the direction of the rolling mill, the control method comprising:

• a first control step of controlling the rolling mill control unit to perform the rolling control and controlling the conveyor control unit to perform the tension control;
• a second control step of controlling the rolling mill control unit to perform the open control and controlling the conveyor control unit to perform the speed control in a case where determination is made that there is an abnormality in the steel sheet while the rolling control and the tension control started by the control by the first control step are performed;
• and
• a third control step of controlling the conveyor control unit to resume the tension control and controlling the rolling mill control unit to resume the rolling control, in a case where determination is made that the conveyance rolls are stabilized at the set rotation speed by the speed control started by the control by the second control step.

A control device that controls casting and rolling equipment including a twin roll-type continuous casting machine, a rolling mill that rolls a steel sheet with a pair of rolling rolls, a conveyor that conveys the steel sheet in a direction of the rolling mill with a pair of conveyance rolls, a rolling mill control unit that controls the rolling mill by any one of controls including a rolling control of rolling the steel sheet with a set roll gap and an open control that performs a control such that at least one of the pair of the rolling rolls does not contact the steel sheet, a conveyor control unit that controls the conveyor by any one of controls including a tension control that conveys the steel sheet at set tension of the steel sheet and a speed control that conveys the steel sheet at a set rotation speed of the conveyance rolls, in which the twin roll-type continuous casting machine includes a pair of casting rolls that rotates in directions opposite to each other, the pair of the casting rolls cools molten steel injected into an upper pouring basin between the pair of the casting rolls and pressure-contacts the cooled and solidified molten steel to discharge the steel sheet from between the pair of the casting rolls, and the conveyor conveys the steel sheet discharged from the twin roll-type continuous casting machine in the direction of the rolling mill, the control device comprising:

• a first control unit that controls the rolling mill control unit to perform the rolling control and controls the conveyor control unit to perform the tension control;
• a second control unit that controls the rolling mill control unit to perform the open control and controls the conveyor control unit to perform the speed control in a case where determination is made that there is an abnormality in the steel sheet while the rolling control and the tension control started by the control by the first control unit are performed;
• and
• a third control unit that controls the conveyor control unit to resume the tension control and controls the rolling mill control unit to resume the rolling control in a case where determination is made that the conveyance rolls are stabilized at the set rotation speed by the speed control started by the control by the second control unit.

A program that controls casting and rolling equipment including a twin roll-type continuous casting machine, a rolling mill that rolls a steel sheet with a pair of rolling rolls, a conveyor that conveys the steel sheet in a direction of the rolling mill with a pair of conveyance rolls, a rolling mill control unit that controls the rolling mill by any one of controls including a rolling control of rolling the steel sheet with a set roll gap and an open control that performs a control such that at least one of the pair of the rolling rolls does not contact the steel sheet, a conveyor control unit that controls the conveyor by any one of controls including a tension control that conveys the steel sheet at set tension of the steel sheet and a speed control that conveys the steel sheet at a set rotation speed of the conveyance rolls, in which the twin roll-type continuous casting machine includes a pair of casting rolls that rotates in directions opposite to each other, the pair of the casting rolls cools molten steel injected into an upper pouring basin between the pair of the casting rolls and pressure-contacts the cooled and solidified molten steel to discharge the steel sheet from between the pair of the casting rolls, and the conveyor conveys the steel sheet discharged from the twin roll-type continuous casting machine in the direction of the rolling mill, the program causing a computer to function as

• a first control unit that controls the rolling mill control unit to perform the rolling control and controls the conveyor control unit to perform the tension control;
• a second control unit that controls the rolling mill control unit to perform the open control and controls the conveyor control unit to perform the speed control in a case where determination is made that there is an abnormality in the steel sheet while the rolling control and the tension control started by the control by the first control unit are performed;
• and
• a third control unit that controls the conveyor control unit to resume the tension control and controls the rolling mill control unit to resume the rolling control in a case where determination is made that the conveyance rolls are stabilized at the set rotation speed by the speed control started by the control by the second control unit.