JPS54139863A - Tensionless rolling method by lift type looper - Google Patents

Tensionless rolling method by lift type looper

Info

Publication number
JPS54139863A
JPS54139863A JP4842878A JP4842878A JPS54139863A JP S54139863 A JPS54139863 A JP S54139863A JP 4842878 A JP4842878 A JP 4842878A JP 4842878 A JP4842878 A JP 4842878A JP S54139863 A JPS54139863 A JP S54139863A
Authority
JP
Japan
Prior art keywords
looper
strip
height
stand
inputted
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
JP4842878A
Other languages
Japanese (ja)
Inventor
Tatsuo Nakajima
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 JP4842878A priority Critical patent/JPS54139863A/en
Publication of JPS54139863A publication Critical patent/JPS54139863A/en
Pending legal-status Critical Current

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
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

PURPOSE: To carry out the rolling work for the strip under the tensionless condition, by installing the looper on the side of the former stand, by lifting the strip, by feeding the strip into the following stand under the free fall condition, and also by automatically controlling the loop's height.
CONSTITUTION: The looper 1 is arranged on the side of the former stand F1. The hydraulic servo-cylinder 2, for variably adjusting the looper 1, sets the height (h) of the looper 1 at the optimum position depending on the set value inputted to the controller 4. At the continuous rolling stage after the tip of the strip S is fed into the following stand F2, the looper's height (h) is detected by the detector 3, whose signal is then inputted to the controller 4; if a deviation of the detected value from the set value is generated, the adjustment signal is inputted to the hydraulic servo- cylinder 2 for adjusting the height of the looper roller 5. As a result, the strip S is continuously fed into the following stand F2 under the tensionless condition keeping the free fall condition.
COPYRIGHT: (C)1979,JPO&Japio
JP4842878A 1978-04-24 1978-04-24 Tensionless rolling method by lift type looper Pending JPS54139863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4842878A JPS54139863A (en) 1978-04-24 1978-04-24 Tensionless rolling method by lift type looper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4842878A JPS54139863A (en) 1978-04-24 1978-04-24 Tensionless rolling method by lift type looper

Publications (1)

Publication Number Publication Date
JPS54139863A true JPS54139863A (en) 1979-10-30

Family

ID=12803061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4842878A Pending JPS54139863A (en) 1978-04-24 1978-04-24 Tensionless rolling method by lift type looper

Country Status (1)

Country Link
JP (1) JPS54139863A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002254105A (en) * 2001-03-02 2002-09-10 Nkk Corp Threading method for thin plate hot finishing roll mill and looper controlling method
JP2011245510A (en) * 2010-05-27 2011-12-08 Sumitomo Metal Ind Ltd Tension adjusting device and tension adjustment method for rolled material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002254105A (en) * 2001-03-02 2002-09-10 Nkk Corp Threading method for thin plate hot finishing roll mill and looper controlling method
JP4599729B2 (en) * 2001-03-02 2010-12-15 Ｊｆｅスチール株式会社 Sheet passing method and looper control method for thin hot rolling mill
JP2011245510A (en) * 2010-05-27 2011-12-08 Sumitomo Metal Ind Ltd Tension adjusting device and tension adjustment method for rolled material

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