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 sheet

Info

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
Application number
JP94879A
Other languages
Japanese (ja)
Other versions
JPS5839209B2 (en
Inventor
Tetsuo Eto
Takehiko Ishii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOKYO KOUON DENPA KK
Nippon Steel Corp
Original Assignee
TOKYO KOUON DENPA KK
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TOKYO KOUON DENPA KK, Nippon Steel Corp filed Critical TOKYO KOUON DENPA KK
Priority to JP94879A priority Critical patent/JPS5839209B2/en
Publication of JPS5594712A publication Critical patent/JPS5594712A/en
Publication of JPS5839209B2 publication Critical patent/JPS5839209B2/en
Expired legal-status Critical Current

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
JP94879A 1979-01-11 1979-01-11 Method for preventing thin plate breakage caused by plate width edge defects Expired JPS5839209B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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