JPS5486459A - Hot rolling method - Google Patents
Hot rolling methodInfo
- Publication number
- JPS5486459A JPS5486459A JP15430977A JP15430977A JPS5486459A JP S5486459 A JPS5486459 A JP S5486459A JP 15430977 A JP15430977 A JP 15430977A JP 15430977 A JP15430977 A JP 15430977A JP S5486459 A JPS5486459 A JP S5486459A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- rigidity
- strip
- tip end
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/24—Automatic variation of thickness according to a predetermined programme
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
Abstract
PURPOSE: To prevent broken bending flow of coil inside produced in a few roll at starting of roll, by making roll gap less than a half of aimed thickness and making the apparent rigidity of rolling mill nearly zero and then, changing a fixed length of the tip end to normal rolling by regular assumed rolling load after rolling.
CONSTITUTION: At the hot rolling mill able to change apparent rigidity by oil pressure control, roll gap is made less than a half of aimed thickness befor putting in strip and normal rigidity A1 of the rolling mill is controlled to be the rigidity A2 being apparently nearly zero and then, rolling load is set up to that of aimed thickness of regular rolling and moreover, a few hundred mm from the tip end of the strip is rolled putting in the strip. As a result of it, the material plastic characteristic of the tip end part of the strip is changed B1 → B4 and thickness is changed H" → H accompanied by the above change. The more the rigidity is small the more the change of thickness becomes large and a few hundred mm of tip end part is rolled in wedge-shaped. Crease or flaw produced in the coil, is able to prevent by the above wedge.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15430977A JPS5486459A (en) | 1977-12-23 | 1977-12-23 | Hot rolling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15430977A JPS5486459A (en) | 1977-12-23 | 1977-12-23 | Hot rolling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5486459A true JPS5486459A (en) | 1979-07-10 |
Family
ID=15581291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15430977A Pending JPS5486459A (en) | 1977-12-23 | 1977-12-23 | Hot rolling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5486459A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109719132A (en) * | 2018-12-14 | 2019-05-07 | 宁波宝新不锈钢有限公司 | A kind of accessory plate and method improving strip coiling folding line defect |
| CN110064660A (en) * | 2019-04-09 | 2019-07-30 | 鞍钢股份有限公司 | Method for controlling tower shape of steel coil |
-
1977
- 1977-12-23 JP JP15430977A patent/JPS5486459A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109719132A (en) * | 2018-12-14 | 2019-05-07 | 宁波宝新不锈钢有限公司 | A kind of accessory plate and method improving strip coiling folding line defect |
| CN110064660A (en) * | 2019-04-09 | 2019-07-30 | 鞍钢股份有限公司 | Method for controlling tower shape of steel coil |
| CN110064660B (en) * | 2019-04-09 | 2020-07-17 | 鞍钢股份有限公司 | Method for controlling tower shape of steel coil |
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