Raw material for metal porous body and metal porous body
US-2021023623-A1 · Jan 28, 2021 · US
Manufacturing apparatus and manufacturing method of hot-rolled coil
US11697144B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11697144-B2 |
| Application number | US-202017439314-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 19, 2020 |
| Priority date | Mar 22, 2019 |
| Publication date | Jul 11, 2023 |
| Grant date | Jul 11, 2023 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Flatness of a hot-rolled steel sheet in a coil is improved when the hot-rolled steel sheet is wound with a mandrel in a hot-rolling process to manufacture a coil. The mandrel has a protruding shape with a center portion in an axial direction protruding from both end portions when seen from a lateral side in the axial direction. Regarding a peripheral length difference, which is a difference between a peripheral length of the center portion of the mandrel and a peripheral length at a predetermined distance from the center portion, the ratio of the peripheral length difference to the peripheral length of the center portion is preferably 0.0002 to 0.012. The protruding shape may be a trapezoidal shape or a polynomial function shape.
First claim
Opening claim text (preview).
What is claimed is: 1. A manufacturing apparatus of a hot-rolled coil which manufactures a coil by winding a hot-rolled steel sheet with a mandrel in a hot-rolling process, comprising: the mandrel having a protruding shape with a center portion in an axial direction protruding from both end portions when seen from a lateral side in the axial direction, wherein regarding a peripheral length difference, which is a difference between a peripheral length of the center portion and a peripheral length at a predetermined distance from the center portion, the ratio of the peripheral length difference to the peripheral length of the center portion is 0.0002 to 0.012. 2. The manufacturing apparatus of the hot-rolled coil according to claim 1 , wherein the ratio of the peripheral length difference to the peripheral length of the center portion is 0.002 to 0.008. 3. The manufacturing apparatus of the hot-rolled coil according to claim 2 , wherein the protruding shape is a trapezoidal shape or a polynomial function shape. 4. A manufacturing method of a hot-rolled coil, which uses the manufacturing apparatus according to claim 3 , comprising: winding a hot-rolled steel sheet, which is non-transformed or undergoing transformation, or after the completion of transformation and is at a temperature of 700° C. or higher, with the mandrel to manufacture the coil. 5. A manufacturing method of a hot-rolled coil, which uses the manufacturing apparatus according to claim 2 , comprising: winding a hot-rolled steel sheet, which is non-transformed or undergoing transformation, or after the completion of transformation and is at a temperature of 700° C. or higher, with the mandrel to manufacture the coil. 6. The manufacturing apparatus of the hot-rolled coil according to claim 1 , wherein the protruding shape is a trapezoidal shape or a polynomial function shape. 7. A manufacturing method of a hot-rolled coil, which uses the manufacturing apparatus according to claim 6 , comprising: winding a hot-rolled steel sheet, which is non-transformed or undergoing transformation, or after the completion of transformation and is at a temperature of 700° C. or higher, with the mandrel to manufacture the coil. 8. A manufacturing method of a hot-rolled coil, which uses the manufacturing apparatus according to claim 1 , comprising: winding a hot-rolled steel sheet, which is non-transformed or undergoing transformation, or after the completion of transformation and is at a temperature of 700° C. or higher, with the mandrel to manufacture the coil.
Assignees
Inventors
Classifications
Drums or other coil-holders · CPC title
- B21C47/02Primary
Winding-up or coiling · CPC title
- B21C47/063Primary
with pressure rollers only · CPC title
expansible or contractible · CPC title
Control of flatness or profile during rolling of strip, sheets or plates · CPC title
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Frequently asked questions
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- What does patent US11697144B2 cover?
- Flatness of a hot-rolled steel sheet in a coil is improved when the hot-rolled steel sheet is wound with a mandrel in a hot-rolling process to manufacture a coil. The mandrel has a protruding shape with a center portion in an axial direction protruding from both end portions when seen from a lateral side in the axial direction. Regarding a peripheral length difference, which is a difference bet…
- Who is the assignee on this patent?
- Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification B21C47/02. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jul 11 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).