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JPS5744412A - Controlling method for rolling work for pipe end by reeling mill - Google Patents

Controlling method for rolling work for pipe end by reeling mill

Info

Publication number
JPS5744412A
JPS5744412A JP55119924A JP11992480A JPS5744412A JP S5744412 A JPS5744412 A JP S5744412A JP 55119924 A JP55119924 A JP 55119924A JP 11992480 A JP11992480 A JP 11992480A JP S5744412 A JPS5744412 A JP S5744412A
Authority
JP
Japan
Prior art keywords
rolling
blank pipe
wall thickness
mill
roll
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
JP55119924A
Other languages
Japanese (ja)
Other versions
JPS6139125B2 (en
Inventor
Fusao Togashi
Kazuyuki Sakurada
Keiichi Masuda
Yasuhiro Sayama
Akio Ejima
Yutaka Funiyu
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 Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP55119924A priority Critical patent/JPS5744412A/en
Publication of JPS5744412A publication Critical patent/JPS5744412A/en
Publication of JPS6139125B2 publication Critical patent/JPS6139125B2/ja
Granted 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/08—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
    • B21B17/12—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills in a discontinuous process, e.g. plug-rolling mills

Landscapes

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

Abstract

PURPOSE:To predict the rolling condition for the end of a blank pipe to be rolled by a reeling mill, and to improve the rolling accuracy, by computing the wall thickness of the end of the blank pipe rolled by a plug mill from equation I. CONSTITUTION:The wall thickness tn of the end of a blank pipe rolled by a plug mill is computed from a predicting equation I. In which, -tnB and -tnF are respectively average values of wall thicknesses -tB and -tF of a blank pipe at positions corresponding to the roll bottom 3 and its flange 4 of a rolling roll 1 used in rolling the blank pipe with a plug mill; -t(n-1)B in an average value of wall thickness -tB of the blank pipe at a position corresponding to the roll bottom 3 of the rolling roll 1 used in every pass of the plug mill; alpha is a coefficient and (a), (b) are correction factors. A difference between the predicted wall thickness tn and the actually measured wall thickness is detected; a set point for the rolling reduction at starting or ending the rolling work of the reeling mill is changed by the same amount as the said detected difference from a preset reference point for the middle part of the blank pipe, and the rolling work is continued.
JP55119924A 1980-08-30 1980-08-30 Controlling method for rolling work for pipe end by reeling mill Granted JPS5744412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55119924A JPS5744412A (en) 1980-08-30 1980-08-30 Controlling method for rolling work for pipe end by reeling mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55119924A JPS5744412A (en) 1980-08-30 1980-08-30 Controlling method for rolling work for pipe end by reeling mill

Publications (2)

Publication Number Publication Date
JPS5744412A true JPS5744412A (en) 1982-03-12
JPS6139125B2 JPS6139125B2 (en) 1986-09-02

Family

ID=14773538

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55119924A Granted JPS5744412A (en) 1980-08-30 1980-08-30 Controlling method for rolling work for pipe end by reeling mill

Country Status (1)

Country Link
JP (1) JPS5744412A (en)

Also Published As

Publication number Publication date
JPS6139125B2 (en) 1986-09-02

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