FR2091677A5 - Medium frequency current, seam welding for producing tubes - from metal strip - Google Patents

Medium frequency current, seam welding for producing tubes - from metal strip

Info

Publication number
FR2091677A5
FR2091677A5 FR7117676A FR7117676A FR2091677A5 FR 2091677 A5 FR2091677 A5 FR 2091677A5 FR 7117676 A FR7117676 A FR 7117676A FR 7117676 A FR7117676 A FR 7117676A FR 2091677 A5 FR2091677 A5 FR 2091677A5
Authority
FR
France
Prior art keywords
tube
frequency current
medium frequency
metal strip
seam welding
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.)
Expired
Application number
FR7117676A
Other languages
French (fr)
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19702023869 external-priority patent/DE2023869C3/en
Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of FR2091677A5 publication Critical patent/FR2091677A5/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K13/00—Welding by high-frequency current heating
    • B23K13/01—Welding by high-frequency current heating by induction heating
    • B23K13/02—Seam welding
    • B23K13/025—Seam welding for tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Induction Heating (AREA)

Abstract

Apparatus for welding a longitudinal or spiral seam of a tube, using a medium frequency current, of the type in which the tube, formed from a metal strip by a set of rolls, can be advanced, the edges of the strip defining a V-shaped slit, in the zone of which the tube is surrounded by an induction coil, and encloses an impedance element which is provided with metal plates forming radial projections with their lateral surface arranged in each case, perpendicularly relative to the direction of the induced current circulating in this tube; these metal plates have a magnetic saturation of 20,000 Gauss and a permeability of 15,000-30,000 mu.
FR7117676A 1970-05-15 1971-05-14 Medium frequency current, seam welding for producing tubes - from metal strip Expired FR2091677A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702023869 DE2023869C3 (en) 1970-05-15 Device for longitudinal or spiral seam welding of metal pipes by means of MF current

Publications (1)

Publication Number Publication Date
FR2091677A5 true FR2091677A5 (en) 1972-01-14

Family

ID=5771239

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7117676A Expired FR2091677A5 (en) 1970-05-15 1971-05-14 Medium frequency current, seam welding for producing tubes - from metal strip

Country Status (2)

Country Link
BE (1) BE767134A (en)
FR (1) FR2091677A5 (en)

Also Published As

Publication number Publication date
DE2023869A1 (en) 1971-11-25
BE767134A (en) 1971-10-01
DE2023869B2 (en) 1975-12-11

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Legal Events

Date Code Title Description
ST Notification of lapse