JPS5594712A - Preventing method for rupture of thin sheet owing to defect at broadside edge of thin sheet - Google Patents
Preventing method for rupture of thin sheet owing to defect at broadside edge of thin sheetInfo
- Publication number
- JPS5594712A JPS5594712A JP94879A JP94879A JPS5594712A JP S5594712 A JPS5594712 A JP S5594712A JP 94879 A JP94879 A JP 94879A JP 94879 A JP94879 A JP 94879A JP S5594712 A JPS5594712 A JP S5594712A
- Authority
- JP
- Japan
- Prior art keywords
- defective portion
- contact roll
- thin sheet
- defect
- circuit
- 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.)
- Granted
Links
Abstract
PURPOSE: To prevent the rupture of the thin sheet at the defective portion, by automatically detecting the defective portion, and by retreating the contact roll before the defective portion arrives at the contact roll, depending on above detected value and the passing speed of the thin sheet.
CONSTITUTION: The assumed sheet breadth obtained by the average broadside edge position arithmetic circuit 6 is inputted to the relational decision circuit 7. The relational decision circuit 7 operates the measured value of the breadth detector (constituted of photodetector 3, photoelectric conversion circuit 4 and broadside edge position arithmetic circuit 5) and the average broadside edge position; in case that above operated deviation is larger than the previously set reference defect value 8 for retreating the contact roll, the defect signal is sent to the arithmetic circuit 9 for operating the timing of producing the retreat signal. Depending on the passing speed 10 of the rolled sheet 2, the arithmetic circuit 9 operates the timing of producing the defect signal, being inputted from the relational decision circuit 7 just before the defective portion arrives at the contact roll, as the contact roll retreat signal 11. Accordingly, depending on the retreat signal 11, the concerned contact roll is hastily retreated just before the defective portion is fed into, for a period necessary for passing the defective portion.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP94879A JPS5839209B2 (en) | 1979-01-11 | 1979-01-11 | Method for preventing thin plate breakage caused by plate width edge defects |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP94879A JPS5839209B2 (en) | 1979-01-11 | 1979-01-11 | Method for preventing thin plate breakage caused by plate width edge defects |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5594712A true JPS5594712A (en) | 1980-07-18 |
JPS5839209B2 JPS5839209B2 (en) | 1983-08-29 |
Family
ID=11487891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP94879A Expired JPS5839209B2 (en) | 1979-01-11 | 1979-01-11 | Method for preventing thin plate breakage caused by plate width edge defects |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5839209B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62238022A (en) * | 1986-04-10 | 1987-10-19 | Nippon Steel Corp | Operation method for tension leveler |
JP2006241578A (en) * | 2005-03-07 | 2006-09-14 | Jfe Steel Kk | Method for producing metal strip and metal strip treating process line |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59147506U (en) * | 1983-03-23 | 1984-10-02 | 三菱電機株式会社 | Ultrasound diagnostic equipment |
-
1979
- 1979-01-11 JP JP94879A patent/JPS5839209B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62238022A (en) * | 1986-04-10 | 1987-10-19 | Nippon Steel Corp | Operation method for tension leveler |
JPH0312970B2 (en) * | 1986-04-10 | 1991-02-21 | Nippon Steel Corp | |
JP2006241578A (en) * | 2005-03-07 | 2006-09-14 | Jfe Steel Kk | Method for producing metal strip and metal strip treating process line |
Also Published As
Publication number | Publication date |
---|---|
JPS5839209B2 (en) | 1983-08-29 |
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