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US 12,103,060 B2Granted
Rolling mill and rolling method for metal plate
AssigneePrimetals Technologies Japan, Ltd.
InventorsYoichi Matsui, Yuta Odawara
Life of this patent
Estimating the term…
Abstract
A rolling mill is provided with: a roll for rolling a metal plate, the roll being capable of shifting in an axial direction and having a tapered portion at an end portion in the axial direction; and a heating unit configured to form an expansion portion protruding in a radial direction in the tapered portion by heating the tapered portion.
Claims14
A rolling mill, comprising:
- a roll for rolling a metal plate, the roll being capable of shifting in an axial direction and having a tapered portion at an end portion in the axial direction;
- and
- a heating unit configured to heat a part of the tapered portion in the axial direction to form an expansion portion protruding in a radial direction in the part of the tapered portion with respect to the other part of the tapered portion, wherein
- the heating unit includes an electromagnetic induction coil, and electromagnetic shields on both sides of the electromagnetic induction coil in the axial direction of the roll for limiting a magnetic path in the axial direction through which a magnetic flux generated by the electromagnetic induction coil flows,
- wherein the rolling mill further comprises:
- an edge drop meter configured to detect an edge drop amount;
- and
- a roll control unit configured to shift the roll in the axial direction on the basis of the edge drop amount detected by the edge drop meter, and
- wherein the edge drop amount is a difference between the plate thickness at a specified position in a central portion of the metal plate in the axial direction and the plate thickness at a measurement position away from a plate edge of the metal plate by a specified distance inward in the axial direction.
6 more elements
A rolling method for a metal plate in which a metal plate is rolled with a roll having a tapered portion at an end portion in an axial direction, and the roll is shifted in the axial direction, the rolling method comprising:
- a step of heating a part of the tapered portion in the axial direction to form an expansion portion protruding in a radial direction in the part of the tapered portion with respect to the other part of the tapered portion, wherein
- the heating step includes a step of heating the part of the tapered portion by a heating unit including an electromagnetic induction coil, and electromagnetic shields on both sides of the electromagnetic induction coil in the axial direction of the roll for limiting a magnetic path in the axial direction through which a magnetic flux generated by the electromagnetic induction coil flows,
- wherein the rolling mill further comprises:
- an edge drop meter configured to detect an edge drop amount;
- and
- a roll control unit configured to shift the roll in the axial direction on the basis of the edge drop amount detected by the edge drop meter, and
- wherein the edge drop amount is a difference between the plate thickness at a specified position in a central portion of the metal plate in the axial direction and the plate thickness at a measurement position away from a plate edge of the metal plate by a specified distance inward in the axial direction.
4 more elements
Dependencies are inferred from the claim text.