GB1395938A - Apparatus for plasma welding and cutting - Google Patents

Apparatus for plasma welding and cutting

Info

Publication number
GB1395938A
GB1395938A GB3820372A GB3820372A GB1395938A GB 1395938 A GB1395938 A GB 1395938A GB 3820372 A GB3820372 A GB 3820372A GB 3820372 A GB3820372 A GB 3820372A GB 1395938 A GB1395938 A GB 1395938A
Authority
GB
United Kingdom
Prior art keywords
arc
resistance
main arc
conductor
cutting
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
GB3820372A
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim GmbH
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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of GB1395938A publication Critical patent/GB1395938A/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
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/006—Control circuits therefor

Landscapes

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

Abstract

1395938 Cutting and welding by fusion MESSER GRIESHEIM GmbH 16 Aug 1972 [16 Aug 1971] 38203/72 Headings B3R and B3V [Also in Division H2] Apparatus for plasma welding and cutting comprises a plasma torch 11 and a D.C. power source 10 having its negative pole 23 connected to the torch electrode 21 and its positive pole 24 connected to a branched conductor 25 the first branch 26 being connected to the torch nozzle 18 to provide a pilot arc 27 and the second branch 28 being connected to the workpiece 29 to provide a main arc 30 to the electrode, the first branch including a resistance 31 to limit the pilot arc current and a conductor 32 which is adapted to bridge the resistance 31 at the moment of striking the main arc whereby at the moment of striking the main arc the resistance of the current path for the pilot arc is lower than that for the main arc. The conductor 32 includes a switch contact 33 adapted to be opened by a time delay relay 34 in the main arc path 28. A high frequency igniter 35 is provided to initiate the pilot arc.
GB3820372A 1971-08-16 1972-08-16 Apparatus for plasma welding and cutting Expired GB1395938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712140967 DE2140967C3 (en) 1971-08-16 1971-08-16 Equipment for plasma welding and cutting

Publications (1)

Publication Number Publication Date
GB1395938A true GB1395938A (en) 1975-05-29

Family

ID=5816863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3820372A Expired GB1395938A (en) 1971-08-16 1972-08-16 Apparatus for plasma welding and cutting

Country Status (8)

Country Link
JP (1) JPS5131032B2 (en)
CH (1) CH535630A (en)
DE (1) DE2140967C3 (en)
FR (1) FR2149347B1 (en)
GB (1) GB1395938A (en)
IT (1) IT962108B (en)
NL (1) NL162581C (en)
SE (1) SE370652B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000799A1 (en) * 1979-09-11 1981-03-19 Commw Scient Ind Res Org A generator of high current pulses

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7601721A (en) * 1976-02-20 1977-08-23 Philips Nv METHOD AND DEVICE FOR PLASMA-MIG WELDING.
JPS544258A (en) * 1977-06-11 1979-01-12 Denyo Co Ltd Method and apparatus for generating plasma arc
JPS5418452A (en) * 1977-07-12 1979-02-10 Nippon Steel Corp Plasma cutting method
DE2900330A1 (en) * 1978-01-09 1979-07-12 Inst Elektroswarki Patona PROCESS FOR PLASMA GENERATION IN A PLASMA ARC GENERATOR AND DEVICE FOR CARRYING OUT THE PROCESS
DE3544605A1 (en) * 1985-12-17 1987-06-19 Linde Ag Method for producing a plasma arc, and a plasma arc burner for carrying out the method
CN101941114B (en) * 2010-08-27 2012-08-29 无锡华联科技集团有限公司 Plasma arc initiating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000799A1 (en) * 1979-09-11 1981-03-19 Commw Scient Ind Res Org A generator of high current pulses
US4459460A (en) * 1979-09-11 1984-07-10 Commonwealth Scientific And Industrial Research Organization Generator of high current pulses

Also Published As

Publication number Publication date
IT962108B (en) 1973-12-20
CH535630A (en) 1973-04-15
JPS4828343A (en) 1973-04-14
SE370652B (en) 1974-10-28
DE2140967C3 (en) 1980-04-17
NL7208925A (en) 1973-02-20
NL162581B (en) 1980-01-15
FR2149347B1 (en) 1974-07-26
NL162581C (en) 1980-06-16
JPS5131032B2 (en) 1976-09-04
DE2140967A1 (en) 1973-02-22
FR2149347A1 (en) 1973-03-30
DE2140967B2 (en) 1976-07-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee