GB1317893A - Ac welding equipment - Google Patents
Ac welding equipmentInfo
- Publication number
- GB1317893A GB1317893A GB1317893DA GB1317893A GB 1317893 A GB1317893 A GB 1317893A GB 1317893D A GB1317893D A GB 1317893DA GB 1317893 A GB1317893 A GB 1317893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- welding
- electrode
- controlled
- negative
- power supply
- 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
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
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1012—Power supply characterised by parts of the process
- B23K9/1037—Means preventing crater forming at the extremity of the seam
Abstract
1317893 Welding by fusion UNITED KINGDOM ATOMIC ENERGY AUTHORITY 21 Aug 1970 [3 Sept 1969] 43718/69 Heading B3R [Also in Divisions G3 and H2] In the welding of Mg or Al alloys using a tungsten electrode and inert gas shielding a thyristor controlled power supply 1-4 controls the welding current according to a programme illustrated in Fig. 2 (not shown) and determined by function generator 12 whose output is connected to firing circuit 11 providing pulses X, Y of controlled firing angle to thyristors 2, 3. A feedback signal from resistor 9 via leads A, B to comparator 14 ensures that the desired welding current profile is maintained. Only the half cycle when the electrode 7 is negative to the workpiece 8 need be controlled, or the respective half waves when the electrode is negative or positive may have independent control programmes, separate firing circuits being provided. As shown both half waves have the same control programme, the waveform being displayed in Fig. 2 (not shown). A bleed resistor 10 is provided, as are a D.C. correction unit 5, and an arc stabilizer and starter 6. The portion (E-F, Fig. 2) of the current profile, for "tail off" or "crater filling" may be linear as shown, or parabolic, or involute. Protection diodes 4 are provided, as is a power supply 13 for the control circuitry.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4371869 | 1969-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1317893A true GB1317893A (en) | 1973-05-23 |
Family
ID=10430028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1317893D Expired GB1317893A (en) | 1969-09-03 | 1969-09-03 | Ac welding equipment |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1317893A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4142091A (en) * | 1976-12-30 | 1979-02-27 | Biethan Sr John D | Portable electric welder |
| FR2403150A2 (en) * | 1977-09-20 | 1979-04-13 | Reeh Holger | WELDING DEVICES IMPROVEMENTS |
| WO2011126922A1 (en) * | 2010-04-09 | 2011-10-13 | Illinois Tool Works Inc. | Welding arc termination method and system |
-
1969
- 1969-09-03 GB GB1317893D patent/GB1317893A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4142091A (en) * | 1976-12-30 | 1979-02-27 | Biethan Sr John D | Portable electric welder |
| FR2403150A2 (en) * | 1977-09-20 | 1979-04-13 | Reeh Holger | WELDING DEVICES IMPROVEMENTS |
| WO2011126922A1 (en) * | 2010-04-09 | 2011-10-13 | Illinois Tool Works Inc. | Welding arc termination method and system |
| US8642924B2 (en) | 2010-04-09 | 2014-02-04 | Illinois Tool Works Inc. | Welding arc termination method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |