GB1325539A - Electric arc welding apparatus - Google Patents
Electric arc welding apparatusInfo
- Publication number
- GB1325539A GB1325539A GB1325539DA GB1325539A GB 1325539 A GB1325539 A GB 1325539A GB 1325539D A GB1325539D A GB 1325539DA GB 1325539 A GB1325539 A GB 1325539A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arc
- electrode
- auxiliary
- supply
- auxiliary electrode
- 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
Links
- 238000003466 welding Methods 0.000 title abstract 5
- 238000010891 electric arc Methods 0.000 title 1
- 239000000945 filler Substances 0.000 abstract 1
- 230000004927 fusion Effects 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
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
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/067—Starting the arc
- B23K9/0672—Starting the arc without direct contact between electrodes
- B23K9/0673—Ionisation of the arc gap by means of a tension with a step front (pulses or high frequency tensions)
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
1325539 Welding by fusion FOSTER WHEELER JOHN BROWN BOILERS Ltd 16 Dec 1970 [29 Sept 1969] 47851/69 Heading B3R [Also in Divisions H2 and H5] In consumable or non-consumable (with or without filler feed) electrode arc welding of plate-to-plate straight seams or tube-to-tube or tube-to-plate circular seams, an arc is struck by moving the main electrode such that the arc path between it and the workpiece passes through the ionized region of an auxiliary electrode arc. The auxiliary electrode is fed from a high voltage (e.g. H.F. oscillating or pulsed or spark discharge) supply, and the auxiliary electrode and the workpiece or a striking plate. As shown, in welding a tube 12 to a plate 14, a non-consumable, tungsten, electrode 22 is carried by a horseshoe-shaped rotor 16, rotatable on a stator 26, via gearing 20, 18, and is supplied with current and inert shielding gas via a lead 24. An auxiliary electrode 30 is held in a holder 32 so as to be capable of limited radial movement with respect to the tube 12, and is supplied with current and shielding gas via a lead 34. The main electrode is connected to a low voltage high current supply 42 through two H.F. suppressors 40. The auxiliary electrode 30 is connected to an H.F. oscillating high voltage supply 44. A high resistance ballast resistor 46 links the two supplies. In operation, the auxiliary electrode 30 is positioned at its radially inward position, the supplies 42, 44 are switched on and the supply 44 strikes the auxiliary arc between the auxiliary electrode 30 and the workpiece. The supply 44 may now be switched off so that the auxiliary arc is maintained at low power from the supply 42 through the resistor 46. No arc is yet struck from the main electrode since the supply 42 has insufficient voltage; and the suppressors 40 and resistor 46 have prevented application of high voltages to the main electrode 22. Rotation of the rotor 16 is now commenced and when the main electrode 22 intercepts the auxiliary arc ionization, a main high current welding arc is struck. Thereupon the auxiliary arc is extinguished due to the negative resistance of the main arc, and the auxiliary electrode 30 may be moved radially outwardly.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4785169 | 1969-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1325539A true GB1325539A (en) | 1973-08-01 |
Family
ID=10446468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1325539D Expired GB1325539A (en) | 1969-09-29 | 1969-09-29 | Electric arc welding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1325539A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009073281A1 (en) | 2007-12-05 | 2009-06-11 | Illinois Tool Works Inc. | System for improved tig arc starting with a welding electrode and a starting electrode |
-
1969
- 1969-09-29 GB GB1325539D patent/GB1325539A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009073281A1 (en) | 2007-12-05 | 2009-06-11 | Illinois Tool Works Inc. | System for improved tig arc starting with a welding electrode and a starting electrode |
| US8217305B2 (en) | 2007-12-05 | 2012-07-10 | Illinois Tool Works Inc. | System and method for improved TIG arc starting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |