JPS55128539A - Removing uneven heating in induction heating of metal pipe and equipment therefor - Google Patents

Removing uneven heating in induction heating of metal pipe and equipment therefor

Info

Publication number
JPS55128539A
JPS55128539A JP3469979A JP3469979A JPS55128539A JP S55128539 A JPS55128539 A JP S55128539A JP 3469979 A JP3469979 A JP 3469979A JP 3469979 A JP3469979 A JP 3469979A JP S55128539 A JPS55128539 A JP S55128539A
Authority
JP
Japan
Prior art keywords
steel tubing
temperature
peripheral direction
signal
coil
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
JP3469979A
Other languages
Japanese (ja)
Inventor
Tadashi Kawaguchi
Toshiyuki Sonoda
Hiroyasu Tsuchiya
Yutaka Motai
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
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP3469979A priority Critical patent/JPS55128539A/en
Publication of JPS55128539A publication Critical patent/JPS55128539A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To remove uneven heating in peripheral direction of steel tubing in induction heating of seamless steel tubing by a method wherein deviation in temperature or wall thickness in peripheral direction of the steel tubing is detected, and the result is used to move induction heater coil to low temperature or thick wall section of the tubing. CONSTITUTION:Seamless steel tubing M is moved on rollers 81-83 while being heated by induction heater coil 10. Plural number of detectors 11 for temperature or wall thickness are used to continuously measure the temperature or wall thickness of the steel tubing in peripheral direction. The detected signal is inputted to the calculator 12, while calculates location of low temperature or thick wall in peripheral direction of the steel tubing M. Center dilocating signal that approaches another induction heater coil 1 to the problem position is inputted to D/A converter 6 at a time after the specified delay. The signal is converted to analog quantity and is compared with location signal of potentiometers 51, 52 of the servo amplifier 7. Output from the servo amplifier 7 controls coil energize circuit for solenoid switch valves 41, 42, so that the axis center of the coil 21 is located at the position indicated by the output from the calculator 12. Thus, peripherally uniform temperature is given to the steel tubing M.
JP3469979A 1979-03-23 1979-03-23 Removing uneven heating in induction heating of metal pipe and equipment therefor Pending JPS55128539A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3469979A JPS55128539A (en) 1979-03-23 1979-03-23 Removing uneven heating in induction heating of metal pipe and equipment therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3469979A JPS55128539A (en) 1979-03-23 1979-03-23 Removing uneven heating in induction heating of metal pipe and equipment therefor

Publications (1)

Publication Number Publication Date
JPS55128539A true JPS55128539A (en) 1980-10-04

Family

ID=12421606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3469979A Pending JPS55128539A (en) 1979-03-23 1979-03-23 Removing uneven heating in induction heating of metal pipe and equipment therefor

Country Status (1)

Country Link
JP (1) JPS55128539A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58189330A (en) * 1982-04-30 1983-11-05 Hitachi Ltd Heat treatment of piping system and coil for heating

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58189330A (en) * 1982-04-30 1983-11-05 Hitachi Ltd Heat treatment of piping system and coil for heating

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