GB523027A - Improvements in and relating to electric welding apparatus - Google Patents
Improvements in and relating to electric welding apparatusInfo
- Publication number
- GB523027A GB523027A GB37313/38A GB3731338A GB523027A GB 523027 A GB523027 A GB 523027A GB 37313/38 A GB37313/38 A GB 37313/38A GB 3731338 A GB3731338 A GB 3731338A GB 523027 A GB523027 A GB 523027A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- resistance
- welding
- auxiliary contacts
- tension winding
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
523,027. Control systems for resistance welding. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 22, 1938, No. 37313. Convention date, Dec. 24, 1937. Addition to 495,484. [Class 38 (iv)] In a resistance welding supply arrangement of the type in which the primary of a welding transformer is supplied with a modulated voltage obtained from alternating current mains by a pair of modulators as in the parent Specification, means are provided to start a driving motor for roller electrodes when the first weld of a stitch seam is made, thereby ensuring that this first weld lies near the edge of the work. In the Figure roller electrodes 1 and 2 of a resistance seam welding machine are connected to the low tension winding 9 of a welding transformer and are adapted to be driven by an electric motor 3 fed through a switch 6 from three-phase mains 7. The high tension winding 11 of the welding transformer is supplied from a modulator set 12 in series with alternating current mains 13. In parallel with the high tension winding 11 is a circuit which includes auxiliary contacts 14 which close when the electrode pressure is sufficient, auxiliary contacts 16 which are closed when switch 6 is open, a protective resistance 15, and the operating coil 17 of switch 6. When, therefore, high tension winding 11 is energized by the first voltage impulse to effect a weld, the simultaneous energization of coil 17 closes switch 6 against spring 8 to start motor 3. The closing of switch 6 makes auxiliary contacts 18 which connect operating coil 17 directly across the main supply thus preventing re-opening of switch 6 when the modulated voltage falls to zero. Auxiliary contacts 16 open after contacts 18 close and the protective resistance 15 prevents a short-circuit of modulator set 12.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE523027X | 1937-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB523027A true GB523027A (en) | 1940-07-03 |
Family
ID=6551834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB37313/38A Expired GB523027A (en) | 1937-12-24 | 1938-12-22 | Improvements in and relating to electric welding apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB523027A (en) |
-
1938
- 1938-12-22 GB GB37313/38A patent/GB523027A/en not_active Expired
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