FR2421688A3 - Mfg. finned tube for heat exchangers - where metal strip is wound as helix onto tube and then welded by radio frequency electric current - Google Patents

Mfg. finned tube for heat exchangers - where metal strip is wound as helix onto tube and then welded by radio frequency electric current

Info

Publication number
FR2421688A3
FR2421688A3 FR7810422A FR7810422A FR2421688A3 FR 2421688 A3 FR2421688 A3 FR 2421688A3 FR 7810422 A FR7810422 A FR 7810422A FR 7810422 A FR7810422 A FR 7810422A FR 2421688 A3 FR2421688 A3 FR 2421688A3
Authority
FR
France
Prior art keywords
tube
electric current
metal strip
strip
wound
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
FR7810422A
Other languages
French (fr)
Other versions
FR2421688B3 (en
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.)
BIRAGHI ENTREPOSE FABRICATIONS
Original Assignee
BIRAGHI ENTREPOSE FABRICATIONS
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 BIRAGHI ENTREPOSE FABRICATIONS filed Critical BIRAGHI ENTREPOSE FABRICATIONS
Priority to FR7810422A priority Critical patent/FR2421688A3/en
Priority to IT68795/78A priority patent/IT1109590B/en
Publication of FR2421688A3 publication Critical patent/FR2421688A3/en
Application granted granted Critical
Publication of FR2421688B3 publication Critical patent/FR2421688B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes
    • 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/08—Seam welding not restricted to one of the preceding subgroups
    • B23K11/082—Seam welding not restricted to one of the preceding subgroups of three-dimensional seams

Landscapes

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

Abstract

The tube is rotated while a metal strip is wound in a helix on the outer surface of the tube; and a roller exerts pressure on the strip so it forms a helical groove in the periphery of the tube while being welded onto the tube. Welding is achieved by feeding electric current through the point of contact of the strip with the tube, the current being of low radio frequency, esp. 50-120 kHz. In the pref. machine, the tube is rotated on its horizontal axis while a trolley is driven along the tube. The trolley carries a magazine contg. the metal strip and also a guide and pressure roller forming the helix. The trolley is also fitted with a pair of skids carrying the electric current and running by friction on the strip and the tube near their point of contact. High speed prodn. of finned tube for industrial boilers etc. is provided.
FR7810422A 1978-04-07 1978-04-07 Mfg. finned tube for heat exchangers - where metal strip is wound as helix onto tube and then welded by radio frequency electric current Granted FR2421688A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7810422A FR2421688A3 (en) 1978-04-07 1978-04-07 Mfg. finned tube for heat exchangers - where metal strip is wound as helix onto tube and then welded by radio frequency electric current
IT68795/78A IT1109590B (en) 1978-04-07 1978-07-27 PROCESS AND MACHINE FOR THE MANUFACTURE OF FINNED TUBES FOR HEAT EXCHANGERS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7810422A FR2421688A3 (en) 1978-04-07 1978-04-07 Mfg. finned tube for heat exchangers - where metal strip is wound as helix onto tube and then welded by radio frequency electric current

Publications (2)

Publication Number Publication Date
FR2421688A3 true FR2421688A3 (en) 1979-11-02
FR2421688B3 FR2421688B3 (en) 1980-08-29

Family

ID=9206865

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7810422A Granted FR2421688A3 (en) 1978-04-07 1978-04-07 Mfg. finned tube for heat exchangers - where metal strip is wound as helix onto tube and then welded by radio frequency electric current

Country Status (2)

Country Link
FR (1) FR2421688A3 (en)
IT (1) IT1109590B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109365565A (en) * 2018-11-28 2019-02-22 昆山诺丹舜蒲胶辊有限公司 The vertical cold winding apparatus of the band steel of helical water-through steel core

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1188690A (en) * 1956-12-11 1959-09-24 Peco Elek Sche Schweiss Maschi Method of manufacturing a cooling finned tube
GB893701A (en) * 1959-01-13 1962-04-11 Ferdinand Busse A method of and apparatus for manufacturing helically finned tubing
GB933848A (en) * 1961-02-23 1963-08-14 American Mach & Foundry Method and apparatus for welding metal elements to curved surfaces
FR1351097A (en) * 1963-03-12 1964-01-31 Ohio Crankshaft Co Welding process and apparatus
FR1499113A (en) * 1964-06-01 1967-10-27 Brown Fintube Co Method and apparatus for helical welding of metal strips to the outer face of resulting helical fin tubes and tubes
FR2096489A1 (en) * 1970-06-25 1972-02-18 Escoa Fintube Corp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1188690A (en) * 1956-12-11 1959-09-24 Peco Elek Sche Schweiss Maschi Method of manufacturing a cooling finned tube
GB893701A (en) * 1959-01-13 1962-04-11 Ferdinand Busse A method of and apparatus for manufacturing helically finned tubing
GB933848A (en) * 1961-02-23 1963-08-14 American Mach & Foundry Method and apparatus for welding metal elements to curved surfaces
FR1351097A (en) * 1963-03-12 1964-01-31 Ohio Crankshaft Co Welding process and apparatus
FR1499113A (en) * 1964-06-01 1967-10-27 Brown Fintube Co Method and apparatus for helical welding of metal strips to the outer face of resulting helical fin tubes and tubes
FR2096489A1 (en) * 1970-06-25 1972-02-18 Escoa Fintube Corp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109365565A (en) * 2018-11-28 2019-02-22 昆山诺丹舜蒲胶辊有限公司 The vertical cold winding apparatus of the band steel of helical water-through steel core

Also Published As

Publication number Publication date
IT1109590B (en) 1985-12-23
FR2421688B3 (en) 1980-08-29
IT7868795A0 (en) 1978-07-27

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