JPS54126652A - Controlling method for shape of pipe in continuous pipe rolling mill - Google Patents

Controlling method for shape of pipe in continuous pipe rolling mill

Info

Publication number
JPS54126652A
JPS54126652A JP13090077A JP13090077A JPS54126652A JP S54126652 A JPS54126652 A JP S54126652A JP 13090077 A JP13090077 A JP 13090077A JP 13090077 A JP13090077 A JP 13090077A JP S54126652 A JPS54126652 A JP S54126652A
Authority
JP
Japan
Prior art keywords
outer diameter
pipe
stand
case
stands
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
JP13090077A
Other languages
Japanese (ja)
Inventor
Yoshio Tai
Masao Ohashi
Masayuki Hatanaka
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP13090077A priority Critical patent/JPS54126652A/en
Publication of JPS54126652A publication Critical patent/JPS54126652A/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
    • B21B37/78—Control of tube rolling

Landscapes

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

Abstract

PURPOSE:To carry out always stable, precise rolling work, by installing a device for continuous measurement of the outer diameter of the pipe on exit sides of the middle and the downstream stands, and by carrying out the feed-forward and feedback control for obtaining suitable number of rotation of the roll, and for correcting it. CONSTITUTION:In case of the rolling mill consisting of eight stands from the first to the eighth, the outer diameter measuring device is installed on the exit side of the fifth stand; the outer diameter D5' is measured for every constant micro-time interval; and then, the suitable roll speed V05 is obtained from this D5' and the previously designed D05, according to the formula. Then, the roll speed for the sixth stand and following stands are obtained similarly. The correction is carried out so as to accelerate in case of the overfill, and to decelerate in case of the under- fill. The outer diamteter measuring device for use of the feedback, being installed only on the exit side of the final stand, satisfactorily serves the practical purpose When the outer diameter D' measured in the final stand differs less than 1% from the ideal outer diameter D0, the feedback for correction of the outer diameter is not dispatched.
JP13090077A 1977-11-02 1977-11-02 Controlling method for shape of pipe in continuous pipe rolling mill Pending JPS54126652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13090077A JPS54126652A (en) 1977-11-02 1977-11-02 Controlling method for shape of pipe in continuous pipe rolling mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13090077A JPS54126652A (en) 1977-11-02 1977-11-02 Controlling method for shape of pipe in continuous pipe rolling mill

Publications (1)

Publication Number Publication Date
JPS54126652A true JPS54126652A (en) 1979-10-02

Family

ID=15045336

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13090077A Pending JPS54126652A (en) 1977-11-02 1977-11-02 Controlling method for shape of pipe in continuous pipe rolling mill

Country Status (1)

Country Link
JP (1) JPS54126652A (en)

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