GB1284636A - An arc welding machine - Google Patents

An arc welding machine

Info

Publication number
GB1284636A
GB1284636A GB3386670A GB3386670A GB1284636A GB 1284636 A GB1284636 A GB 1284636A GB 3386670 A GB3386670 A GB 3386670A GB 3386670 A GB3386670 A GB 3386670A GB 1284636 A GB1284636 A GB 1284636A
Authority
GB
United Kingdom
Prior art keywords
capacitor
arc
rectifier
voltage
output
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
GB3386670A
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.)
TOA SEKI KK
Original Assignee
TOA SEKI KK
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 JP6374469A external-priority patent/JPS5027034B1/ja
Priority claimed from JP10524169A external-priority patent/JPS543815B1/ja
Application filed by TOA SEKI KK filed Critical TOA SEKI KK
Publication of GB1284636A publication Critical patent/GB1284636A/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
    • B23K9/00—Arc welding or cutting
    • B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
    • B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits

Landscapes

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

Abstract

1284636 Control systems for D.C. arc welding apparatus TOA SEIKI K K 13 July 1970 [26 July 1969 13 Aug 1969 29 Dec 1969] 33866/70 Heading H2H A direct current arc welding apparatus supplied from a single phase A.C. source by way of a rectifier device is provided with a capacitor which is charged when the output voltage of the rectifier device is relatively high and which discharges into the arc when the output voltage of the rectifier device is comparatively low, thus preventing extinction of the arc when the output voltage of the rectifier device drops to zero. A D.C. arc welding apparatus of the type having a consumable electrode continuously fed towards a workpiece is connected across the output terminals V 3 of a rectifier bridge 14 comprising a pair of diodes and a pair of thyristors 14a, 14b. A capacitor 18 in series with a saturable reactor 17, the saturation of which is set by a potentiometer 47 in a control unit 24 to control the charging rate of the capacitor 18. Thus the capacitor 18 receives a charge during the unsmoothed output half-cycles of the rectifier bridge 14 until the voltage value of the half cycle drops below the voltage to which the capacitor 18 has become charged. The capacitor thereupon discharges into the arc formed between the electrode and workpiece, the change in direction of the current in the working winding of the saturable reactor 17 altering the effect of the reactor compared with that during the capacitor charging phase. Thus, the capacitor energy maintains the arc during the periods in which the output voltage of the rectifier bridge 14 is below the arc voltage. The A.C. input voltage is regulated by a device 13 comprising an auto-transformer and the waveform of the output of the rectifier bridge 14 is shaped by a circuit device 23 which controls the firing of the thyristors 14a, 14b so that the waveform is of a trapezoidal form. In other embodiments the rectifier device 14 is a half wave device, the reactor 17 may be a single winding device which is not saturable or the supply from the A.C. source 11 to the transformer 12 may be controlled by a pair of backto-back thyristors.
GB3386670A 1969-07-26 1970-07-13 An arc welding machine Expired GB1284636A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP5871169 1969-07-26
JP6374469A JPS5027034B1 (en) 1969-08-13 1969-08-13
JP10524169A JPS543815B1 (en) 1969-12-29 1969-12-29

Publications (1)

Publication Number Publication Date
GB1284636A true GB1284636A (en) 1972-08-09

Family

ID=27296659

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3386670A Expired GB1284636A (en) 1969-07-26 1970-07-13 An arc welding machine

Country Status (2)

Country Link
DE (1) DE2036893A1 (en)
GB (1) GB1284636A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2717651A1 (en) * 1976-04-28 1977-11-10 Svetsia Ab ARC WELDING DEVICE
FR2451794A1 (en) * 1979-03-19 1980-10-17 Inst Elektroswarki Patona Pulsed arc and deposition welding of workpieces - where electronic circuits permit replacement of non-consumable electrodes by consumable electrodes, increasing productivity

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8007479L (en) * 1980-10-24 1982-04-25 Esab Ab REAR WELDING DEVICE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2717651A1 (en) * 1976-04-28 1977-11-10 Svetsia Ab ARC WELDING DEVICE
FR2451794A1 (en) * 1979-03-19 1980-10-17 Inst Elektroswarki Patona Pulsed arc and deposition welding of workpieces - where electronic circuits permit replacement of non-consumable electrodes by consumable electrodes, increasing productivity

Also Published As

Publication number Publication date
DE2036893A1 (en) 1971-07-22

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees
427C Application for amendment of specification now open to opposition (sect. 27/1949)
427B Order made restoring the patent (sect. 27/1949)
PCNP Patent ceased through non-payment of renewal fee