JPS54125159A - Preventing method for top mark - Google Patents

Preventing method for top mark

Info

Publication number
JPS54125159A
JPS54125159A JP3301678A JP3301678A JPS54125159A JP S54125159 A JPS54125159 A JP S54125159A JP 3301678 A JP3301678 A JP 3301678A JP 3301678 A JP3301678 A JP 3301678A JP S54125159 A JPS54125159 A JP S54125159A
Authority
JP
Japan
Prior art keywords
gap
product
thickness
roll gap
bite
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
Application number
JP3301678A
Other languages
Japanese (ja)
Inventor
Tomoo Nishi
Shigemi Sawada
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP3301678A priority Critical patent/JPS54125159A/en
Publication of JPS54125159A publication Critical patent/JPS54125159A/en
Pending legal-status Critical Current

Links

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  • Control Of Metal Rolling (AREA)

Abstract

PURPOSE: To prevent the top mark and to improve the yield and quality, by adjusting the roll gap of the final stand of the finishing mill at early stage of the bite-in of the material, and by reducing the thickness of the tip portion of the strip to a thickness thinner than the specified thickness of the product.
CONSTITUTION: The roll gap of the work rolls 3 and 4, for biting the material 5 to be rolled, before the material 5 is bitten in, is settled at a gap narrower than the gap for obtaining the specified thickness of the product; simultaneously with the bite-in of the material 5, the roll gap is enlarged up to the gap for obtaining the specified thickness of the product. The rolling load due to this bite-in is detected by the load cell 7, and also, the timer 8 is actuated by the output of detection, and the roll gap is enlarged to the specified thickness of the product, through the hydraulic controller 9, by the cylinder 6 of the hydraulic screw down device.
COPYRIGHT: (C)1979,JPO&Japio
JP3301678A 1978-03-24 1978-03-24 Preventing method for top mark Pending JPS54125159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3301678A JPS54125159A (en) 1978-03-24 1978-03-24 Preventing method for top mark

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3301678A JPS54125159A (en) 1978-03-24 1978-03-24 Preventing method for top mark

Publications (1)

Publication Number Publication Date
JPS54125159A true JPS54125159A (en) 1979-09-28

Family

ID=12375002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3301678A Pending JPS54125159A (en) 1978-03-24 1978-03-24 Preventing method for top mark

Country Status (1)

Country Link
JP (1) JPS54125159A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006272370A (en) * 2005-03-28 2006-10-12 Jfe Steel Kk Method for setting target sheet thickness in hot rolling
CN103170507A (en) * 2013-03-26 2013-06-26 鞍钢股份有限公司 Method of preventing surface of strip steel from being scratched when strip steel passes through finishing mill without being rolled

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006272370A (en) * 2005-03-28 2006-10-12 Jfe Steel Kk Method for setting target sheet thickness in hot rolling
JP4617956B2 (en) * 2005-03-28 2011-01-26 Ｊｆｅスチール株式会社 Target thickness setting method during hot rolling
CN103170507A (en) * 2013-03-26 2013-06-26 鞍钢股份有限公司 Method of preventing surface of strip steel from being scratched when strip steel passes through finishing mill without being rolled

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