JPS5639112A - Controlling method for outer diameter of seamless steel pipe - Google Patents

Controlling method for outer diameter of seamless steel pipe

Info

Publication number
JPS5639112A
JPS5639112A JP11543479A JP11543479A JPS5639112A JP S5639112 A JPS5639112 A JP S5639112A JP 11543479 A JP11543479 A JP 11543479A JP 11543479 A JP11543479 A JP 11543479A JP S5639112 A JPS5639112 A JP S5639112A
Authority
JP
Japan
Prior art keywords
outer diameter
roll gap
temperature
pipe
exit
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
JP11543479A
Other languages
Japanese (ja)
Other versions
JPS6128408B2 (en
Inventor
Yasuhiro Sayama
Hideo Abe
Kazuyuki Sakurada
Takaaki Toyooka
Yutaka Funiyu
Akio Ejima
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 JP11543479A priority Critical patent/JPS5639112A/en
Publication of JPS5639112A publication Critical patent/JPS5639112A/en
Publication of JPS6128408B2 publication Critical patent/JPS6128408B2/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
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills

Landscapes

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

Abstract

PURPOSE:To automatically control the outer diameter of the finished pipe to the normal value, by feedforward setting the roll gap of the respective stands of the sizing mill depending on the outer diameter and temperature of the pipe blank, and by feeding back the outer diameter and temperature on the run-out side of the mill and the outer diameter after cooling, in manufacturing the seamless steel pipe. CONSTITUTION:The temperature of the pipe blank 17 is measured by the thermometers 2, 5, at the exit of the reeler 1 or at the exit of the next reheating furnace 4. From the time required in carrying the pipe blank 17 to the entrance of the sizing mill 7, the temperature and outer diameter at the entrance of the mill 7 are presumed, and the roll gap is set so as to make the outer diameter to be obtained by the final stand to be equal to the aim outer diameter under the hot condition. Hereupon, the roll gap is decided so as to make the outer diameter at the exit of the stand M to be proportional to the designed reference cumulative drawing rate. This correction value for the roll gap is multiplied by the feedback factor proportional to the cumulative outer diameter drawing rate of the n-th stand, in consideration of the mutual influence of the drafts by the stands of odd numbers and of even numbers; hereby, the reference roll gap is corrected and the outer diameter and the roundness of the finished pipe are corrected.
JP11543479A 1979-09-08 1979-09-08 Controlling method for outer diameter of seamless steel pipe Granted JPS5639112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11543479A JPS5639112A (en) 1979-09-08 1979-09-08 Controlling method for outer diameter of seamless steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11543479A JPS5639112A (en) 1979-09-08 1979-09-08 Controlling method for outer diameter of seamless steel pipe

Publications (2)

Publication Number Publication Date
JPS5639112A true JPS5639112A (en) 1981-04-14
JPS6128408B2 JPS6128408B2 (en) 1986-06-30

Family

ID=14662464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11543479A Granted JPS5639112A (en) 1979-09-08 1979-09-08 Controlling method for outer diameter of seamless steel pipe

Country Status (1)

Country Link
JP (1) JPS5639112A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379237A (en) * 1990-05-31 1995-01-03 Integrated Diagnostic Measurement Corporation Automated system for controlling the quality of regularly-shaped products during their manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379237A (en) * 1990-05-31 1995-01-03 Integrated Diagnostic Measurement Corporation Automated system for controlling the quality of regularly-shaped products during their manufacture
US5608660A (en) * 1990-05-31 1997-03-04 Integrated Diagnostic Measurement Corp. Automated system for controlling the quality of geometrically regular-shaped products during their manufacture

Also Published As

Publication number Publication date
JPS6128408B2 (en) 1986-06-30

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