JPS55149723A - Indicating method for singular point of cold rolled steel strip - Google Patents
Indicating method for singular point of cold rolled steel stripInfo
- Publication number
- JPS55149723A JPS55149723A JP5900379A JP5900379A JPS55149723A JP S55149723 A JPS55149723 A JP S55149723A JP 5900379 A JP5900379 A JP 5900379A JP 5900379 A JP5900379 A JP 5900379A JP S55149723 A JPS55149723 A JP S55149723A
- Authority
- JP
- Japan
- Prior art keywords
- singular point
- cold rolling
- concave flaw
- strip material
- flaw
- 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
Landscapes
- Metal Rolling (AREA)
Abstract
PURPOSE: To prevent generation of the draw defect even in case of cold rolled very thin steel strip, and to improve the yield and productivity, by making the unpierced concave flaw nearby the singular point of the strip material before being fed to the cold rolling pass, and after carrying out the cold rolling pass, by making this concave flaw to be the pierced hole for indicating the singular point.
CONSTITUTION: A concave flaw 3 is made nearby the singular point of the strip material 1 before being fed to the cold folling pass, using the drill, etc.; then, this strip material 1 is cold rolled and hereby the pierced hole 2 is formed from the concave flaw 3. That is though the concave flaw 3 is an unpierced hole, it is pierced in the direction of thickness by the cold rolling work. The length of long side l of this pierced hole 2 can be made shorter as compared with the conventional method, hence, the generation of the draw defect can be prevented. On purpose to surely form the pierced hole 2 from the concave flaw 3 by the cold rolling work, the depth of the concave flaw 3 is desirable to be 30% or more of thickness of the strip material 1 before the cold rolling pass; however, if the depth is excessive, the length of long side l of the pierced hole 2 becomes longer.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5900379A JPS55149723A (en) | 1979-05-14 | 1979-05-14 | Indicating method for singular point of cold rolled steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5900379A JPS55149723A (en) | 1979-05-14 | 1979-05-14 | Indicating method for singular point of cold rolled steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55149723A true JPS55149723A (en) | 1980-11-21 |
Family
ID=13100668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5900379A Pending JPS55149723A (en) | 1979-05-14 | 1979-05-14 | Indicating method for singular point of cold rolled steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55149723A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368602A (en) * | 2014-09-30 | 2015-02-25 | 巢湖广丰金属制品有限公司 | Automatic control method for shaping strip steel surface defects |
-
1979
- 1979-05-14 JP JP5900379A patent/JPS55149723A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368602A (en) * | 2014-09-30 | 2015-02-25 | 巢湖广丰金属制品有限公司 | Automatic control method for shaping strip steel surface defects |
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