JPS54123542A - Magnetic drive type controlling method for arc - Google Patents

Magnetic drive type controlling method for arc

Info

Publication number
JPS54123542A
JPS54123542A JP2987878A JP2987878A JPS54123542A JP S54123542 A JPS54123542 A JP S54123542A JP 2987878 A JP2987878 A JP 2987878A JP 2987878 A JP2987878 A JP 2987878A JP S54123542 A JPS54123542 A JP S54123542A
Authority
JP
Japan
Prior art keywords
arc
exciting
face
blowout
hereby
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
JP2987878A
Other languages
Japanese (ja)
Inventor
Hiroichi Nomura
Yukihiko Sato
Katsumi Tono
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 JP2987878A priority Critical patent/JPS54123542A/en
Publication of JPS54123542A publication Critical patent/JPS54123542A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the blowout of the arc flame from the surface and back face of the metallic material, and to improve the heating efficiency, by arranging exciting coils on the surface and back face of metallic material, and by controlling the ratio of supplied currents correspondingly to the temperature change in the end face or the moving speed of the arc.
CONSTITUTION: The exciting coils 3a, 3b, are arranged respectively on the front side and the back side, and the ratio of their exciting currents is controlled; hereby, the magnetic flux distribution uniform in the direction of thickness of the gap is maintained. In case of butting of two pipe materials, the arc flame is in danger of blowing off outward depending on the increase of the rotational speed at the lattr half period of heating; hence, the current of the exciting coil on the outer side is increased so as to raise the magnetic flux density on the outer side for the purpose of making the force of magnetic arc blow to resist against the centrifugal force; hereby, the blowout of the arc flame is restrained. The control of the exciting current for the outer face is carried out by either one of the temperature detector, the photoelectric type arc detector, or the sequential time.
COPYRIGHT: (C)1979,JPO&Japio
JP2987878A 1978-03-17 1978-03-17 Magnetic drive type controlling method for arc Pending JPS54123542A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2987878A JPS54123542A (en) 1978-03-17 1978-03-17 Magnetic drive type controlling method for arc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2987878A JPS54123542A (en) 1978-03-17 1978-03-17 Magnetic drive type controlling method for arc

Publications (1)

Publication Number Publication Date
JPS54123542A true JPS54123542A (en) 1979-09-25

Family

ID=12288226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2987878A Pending JPS54123542A (en) 1978-03-17 1978-03-17 Magnetic drive type controlling method for arc

Country Status (1)

Country Link
JP (1) JPS54123542A (en)

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