FR2317994A2 - Fluxless brazing of tubes without removing oxide film - by pretinning, connecting and applying heat and pressure - Google Patents

Fluxless brazing of tubes without removing oxide film - by pretinning, connecting and applying heat and pressure

Info

Publication number
FR2317994A2
FR2317994A2 FR7621596A FR7621596A FR2317994A2 FR 2317994 A2 FR2317994 A2 FR 2317994A2 FR 7621596 A FR7621596 A FR 7621596A FR 7621596 A FR7621596 A FR 7621596A FR 2317994 A2 FR2317994 A2 FR 2317994A2
Authority
FR
France
Prior art keywords
tubes
oxide film
brazing solder
pretinning
pressure
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
FR7621596A
Other languages
French (fr)
Inventor
Gerald Joseph Kushner
John Henry Nininger Iii
Bobby Lynn Garner
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority claimed from FR7621593A external-priority patent/FR2317993A1/en
Publication of FR2317994A2 publication Critical patent/FR2317994A2/en
Pending 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0012—Brazing heat exchangers
    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/14—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams
    • B23K1/18—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams circumferential seams, e.g. of shells
    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

The ends of two tubes which fit into each other leaving a space between them, are coated with a brazing solder. The tubes are fitted together and the surfaces to be joined are pressed together with a heated former. The brazing solder melts and a relative movement is produced between the surfaces and the brazing solder. The oxide film on the brazing solder is dispersed in a disordered fashion and the film of brazing solder of min thickness on each surface is combined to form a joint between the tubes. The fluxless joining of pre-tinned tubes without removing the oxide film on the surface of the filler metal, is achieved. The tubes are esp. for use in heat exchangers in refrigeration systems. Her Al is used but other metals used in refrigeration systems e.g. Cu, steel or a combination of these can be successfully joined. High-speed automatic joining of tubes can be achieved.
FR7621596A 1975-07-16 1976-07-15 Fluxless brazing of tubes without removing oxide film - by pretinning, connecting and applying heat and pressure Pending FR2317994A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59631575A 1975-07-16 1975-07-16
FR7621593A FR2317993A1 (en) 1975-07-16 1976-07-15 Fluxless soldering of aluminium using crimped joints - where crimping deformation breaks up oxide film on molten solder

Publications (1)

Publication Number Publication Date
FR2317994A2 true FR2317994A2 (en) 1977-02-11

Family

ID=26219544

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7621596A Pending FR2317994A2 (en) 1975-07-16 1976-07-15 Fluxless brazing of tubes without removing oxide film - by pretinning, connecting and applying heat and pressure

Country Status (1)

Country Link
FR (1) FR2317994A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345262A1 (en) * 1976-03-24 1977-10-21 Gen Electric TUBE ELEMENT ASSEMBLY PROCESS
WO1995018695A1 (en) * 1994-01-07 1995-07-13 Krupp Vdm Gmbh Process and plant for joining aluminium parts by soldering, uses of the process and plant for implementing the process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345262A1 (en) * 1976-03-24 1977-10-21 Gen Electric TUBE ELEMENT ASSEMBLY PROCESS
WO1995018695A1 (en) * 1994-01-07 1995-07-13 Krupp Vdm Gmbh Process and plant for joining aluminium parts by soldering, uses of the process and plant for implementing the process

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