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GB1340794A - Plasma-mig arc welding - Google Patents

Plasma-mig arc welding

Info

Publication number
GB1340794A
GB1340794A GB3257272*[A GB1340794DA GB1340794A GB 1340794 A GB1340794 A GB 1340794A GB 1340794D A GB1340794D A GB 1340794DA GB 1340794 A GB1340794 A GB 1340794A
Authority
GB
United Kingdom
Prior art keywords
consumable electrode
plasma
consumable
contact tube
stream
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
GB3257272*[A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB1340794A publication Critical patent/GB1340794A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/42—Plasma torches using an arc with provisions for introducing materials into the plasma, e.g. powder or liquid
    • 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
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/02—Plasma welding
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
    • B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
    • B23K9/295—Supporting devices adapted for making use of shielding means the shielding means being a gas using consumable electrode-wire
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
    • B23K9/296—Supporting devices adapted for making use of shielding means the shielding means being a gas using non-consumable electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3405—Arrangements for stabilising or constricting the arc, e.g. by an additional gas flow
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3421—Transferred arc or pilot arc mode

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Arc Welding In General (AREA)

Abstract

1340794 Welding by fusion PHILIPS GLOEILAMPENFABRIEKEN NV 30 Nov 1972 [12 July 1972] 32572/72 Heading B3R In arc welding with a plasma-MIG torch wherein a consumable electrode is guided into the plasma stream extending from a non- consumable, e.g. tungsten, electrode, an oxidizing gas stream is introduced, through at least one channel, into the plasma stream intermediate the respective ends of the consumable and non-consumable electrodes to improve arc stability and allow higher currents. The electrodes may be both positive or, as shown, both negative. The oxidizing gas stream oxidizes the end of the consumable electrode to prevent cathode root excursion in the case of a negative consumable electrode, and prevents damage to the torch nozzle or contact tube in the case of a positive consumable electrode, thus enabling a shorter set-back of the consumable electrode contact tube and, consequently, allowing the torch to be brought closer to the workpiece surface. The oxidizing gas stream may comprise up to 10%, preferably 2%, by volume, of O 2 in an inert gas, e.g. A; the plasma gas may be A; and shielding gas surrounding the plasma stream and MIG arc may be a mixture of A and CO 2 (e.g. 20% by volume CO 2 ). As shown, a consumable electrode contact tube 13 and a non-consumable electrode 9 in a holder 8 are disposed respectively coaxial with and eccentric of a constructing orifice 7 of a nozzle 5 of a housing 3. A consumable electrode 11 is fed through the contact tube by rollers 15 driven by a controllable speed motor. Plasma and shielding gases are fed respectively through ducts 19, 21. The housing 3, holder 8 and contact tube 13 are water cooled through connections 23<SP>1</SP>, 23<SP>11</SP>, 25<SP>1</SP>, 25<SP>11</SP>, 27<SP>1</SP>, 27<SP>11</SP>. The non- consumable electrode is connected to the negative terminal of a supply 29 via an H.F. generator 31 and the consumable electrode is connected to the negative terminal of the supply 33. The oxidizing gas stream is injected through a tube 32 terminating in a radial bore 39 of the nozzle 5.
GB3257272*[A 1972-07-12 1972-11-30 Plasma-mig arc welding Expired GB1340794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3257272 1972-07-12

Publications (1)

Publication Number Publication Date
GB1340794A true GB1340794A (en) 1974-01-30

Family

ID=10340723

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3257272*[A Expired GB1340794A (en) 1972-07-12 1972-11-30 Plasma-mig arc welding

Country Status (11)

Country Link
JP (1) JPS5433228B2 (en)
AU (1) AU467551B2 (en)
BE (1) BE802153A (en)
CA (1) CA991280A (en)
CH (1) CH573788A5 (en)
DE (1) DE2332070C3 (en)
FR (1) FR2192434B1 (en)
GB (1) GB1340794A (en)
IT (1) IT989806B (en)
NL (1) NL7309450A (en)
SE (1) SE394381B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975615A (en) * 1974-08-22 1976-08-17 Denyo Kabushiki Kaisha Vertical position welding method and apparatus for practicing the method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7404120A (en) * 1974-03-27 1975-09-30 Philips Nv METHOD AND DEVICE FOR ARC WELDING.
JPS5183853A (en) * 1975-01-22 1976-07-22 Hitachi Ltd AAKUYO SETSUHO
NL7603319A (en) * 1976-03-31 1977-10-04 Philips Nv METHOD AND DEVICE FOR PLASMA-MIG WELDING.
US4521666A (en) * 1982-12-23 1985-06-04 Union Carbide Corporation Plasma arc torch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1288768A (en) * 1961-02-06 1962-03-30 Soudure Autogene Elect Apparatus for producing a constricted electric arc
US3312566A (en) * 1962-08-01 1967-04-04 Giannini Scient Corp Rod-feed torch apparatus and method
NL164779C (en) * 1971-04-01 1981-02-16 Philips Nv METHOD FOR PLASMA MIG WELDING.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975615A (en) * 1974-08-22 1976-08-17 Denyo Kabushiki Kaisha Vertical position welding method and apparatus for practicing the method

Also Published As

Publication number Publication date
DE2332070B2 (en) 1980-01-24
AU5788373A (en) 1975-01-09
JPS4956853A (en) 1974-06-03
FR2192434B1 (en) 1976-11-12
IT989806B (en) 1975-06-10
CH573788A5 (en) 1976-03-31
BE802153A (en) 1974-01-10
NL7309450A (en) 1974-01-15
SE394381B (en) 1977-06-27
DE2332070A1 (en) 1974-01-31
CA991280A (en) 1976-06-15
JPS5433228B2 (en) 1979-10-19
AU467551B2 (en) 1975-12-04
FR2192434A1 (en) 1974-02-08
DE2332070C3 (en) 1980-09-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee