Slab warpage detection apparatus and method of detecting warpage of slab
Provided is a slab warpage detection apparatus detecting warpage of a slab drawn from a mold in continuous casting equipment. The slab warpage detection apparatus includes a pair of pressing roils that pinches the slab on a rear side of a roll segment, supporting the slab drawn from the mold, in a slab drawing direction, a movement unit that supports the pair of pressing rolls to be movable in a thickness direction of the slab, and a position detecting unit that detects positions of the pressing rolls in the thickness direction of the slab.
1. A slab warpage detection apparatus detecting warpage of a slab drawn from a mold in continuous casting equipment, the slab warpage detection apparatus comprising:
a pair of pressing rolls that pinches the slab on an exit side of a roll segment supporting the slab drawn from the mold;
a pair of movement units, each movement unit of the pair of movement units configured to support a respective pressing roll of the pair of pressing rolls, each of the pressing rolls of the pair of pressing rolls configured to be movable in a thickness direction of the slab;
a position detecting unit that detects positions of each of the pressing rolls in the thickness direction of the slab; and
a control device programmed to:
receive information of the position of each of the pressing rolls detected by the position detecting unit;
determine whether an amount of displacement of the positions of each of the pressing rolls in the thickness direction of the slab exceeds a predetermined value; and
adjust pressing forces of the pair of pressing rolls to straighten warpage of the slab in a case where the amount of displacement of the positions of the pressing rolls in the thickness direction of the slab exceeds the predetermined value;
wherein the movement unit comprises a cylinder and a rod portion disposed to be retractable from the cylinder, and the pressing rolls are provided at a tip of the rod portion,
wherein the position detecting unit is connected to the control device, and
wherein the warpage of the slab is straightened by generating a difference between pressing forces of the respective pressing roll of the pair of pressing rolls and applying a bending deformation to the slab.
2. The slab warpage detection apparatus according to claim 1 ,
wherein the slab having a center solid phase ratio of 70% or higher is used as a detection target.
3. The slab warpage detection apparatus according to claim 1 ,
wherein the continuous casting equipment is vertical-type continuous casting equipment.
4. A method of detecting warpage of the slab using the slab warpage detection apparatus according to claim 1 , the method comprising:
detecting warpage of a slab by causing the position detecting unit to detect the positions of the pressing rolls when the pair of pressing rolls moves in the thickness direction of the slab in a manner following a shape of the slab in a state where the slab is pinched by the pair of pressing rolls; and
straightening warpage of the slab by adjusting pressing forces of the pair of pressing rolls in a case where an amount of displacement of the positions of the pressing rolls in the thickness direction of the slab exceeds a predetermined value.
5. The slab warpage detection apparatus according to claim 2 , wherein the continuous casting equipment is vertical-type continuous casting equipment.
6. A method of detecting warpage of the slab using the slab warpage detection apparatus according to claim 2 , the method comprising:
detecting warpage of a slab by causing the position detecting unit to detect the positions of the pressing rolls when the pair of pressing rolls moves in the thickness direction of the slab in a manner following a shape of the slab in a state where the slab is pinched by the pair of pressing rolls; and
straightening warpage of the slab by adjusting pressing forces of the pair of pressing rolls in a case where an amount of displacement of the positions of the pressing rolls in the thickness direction of the slab exceeds a predetermined value.
7. A method of detecting warpage of the slab using the slab warpage detection apparatus according to claim 3 , the method comprising:
detecting warpage of a slab by causing the position detecting unit to detect the positions of the pressing rolls when the pair of pressing rolls moves in the thickness direction of the slab in a manner following a shape of the slab in a state where the slab is pinched by the pair of pressing rolls; and
straightening warpage of the slab by adjusting pressing forces of the pair of pressing rolls in a case where an amount of displacement of the positions of the pressing rolls in the thickness direction of the slab exceeds a predetermined value.
8. A method of detecting warpage of the slab using the slab warpage detection apparatus according to claim 5 , the method comprising:
detecting warpage of a slab by causing the position detecting unit to detect the positions of the pressing rolls when the pair of pressing rolls moves in the thickness direction of the slab in a manner following a shape of the slab in a state where the slab is pinched by the pair of pressing rolls; and
straightening warpage of the slab by adjusting pressing forces of the pair of pressing rolls in a case where an amount of displacement of the positions of the pressing rolls in the thickness direction of the slab exceeds a predetermined value.