GB394758A - Improvements relating to electric spot welding machines - Google Patents
Improvements relating to electric spot welding machinesInfo
- Publication number
- GB394758A GB394758A GB543632A GB543632A GB394758A GB 394758 A GB394758 A GB 394758A GB 543632 A GB543632 A GB 543632A GB 543632 A GB543632 A GB 543632A GB 394758 A GB394758 A GB 394758A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cam
- welding
- electrodes
- motor
- action
- 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
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
- B23K11/312—Electrode holders and actuating devices therefor for several electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
394,758. Welding-machines. DORRAT, J. A., 9, Kenwood Road, Stretford, Manchester, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. Feb. 23,1932, No. 5436. [Class 83 (iv).] A multiple spot-welding machine, particularly for use in the manufacture of meter box parts, is provided with electrodes 1, 2, 3, Fig. 3, which can be moved simultaneously to operative position towards a fixed set of electrodes 1a, 2a, 3a and retained there during the welding operation by a rotary cam 4 which is actuated by a continuously operated electric motor 29 through a magnetic clutch 30. Engagement of the clutch and the motor is effected initially by means of a push-button 44, Fig. 1, or other manual or pedal device, and thereafter maintained automatically by an electric switch 39-41, which is closed by the action of a cam 37, until the main cam 4 has rotated through 345‹. The welding circuit is established and maintained during rotation of the main cam through 270‹ by the action of a cam 38 on contacts 40, 42, the latter energizing a coil 46 adapted to close the main contact 45 of a welding transformer 35. When the welding circuit is broken, the cam 4 exerts an increased force on the movable electrodes to upset the weld and then permits their withdrawal to inoperative position under the action of springs, whereupon contact of a braking device 43 with the retracted clutch 30 brings the cam to rest after one complete revolution. The duration of the weld can be adjusted by providing a rheostat 48 to vary the speed of the motor or by adjustment of the ratio of gearing between a constant speed motor and the cam shaft. The welding current mav be varied by adjusting the voltage tap of the welding current transformer to accommodate different thicknesses of work. The movable electrodes may be subjected to the same predetermined pressure by interposing spring-loaded plungers 19, 20, 21, Fig. 3, between the electrodes and the cam 4. In a modification, Fig. 5 (not shown), a combined multiple electrode is moved towards a set of fixed electrodes by similar means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB543632A GB394758A (en) | 1932-02-23 | 1932-02-23 | Improvements relating to electric spot welding machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB543632A GB394758A (en) | 1932-02-23 | 1932-02-23 | Improvements relating to electric spot welding machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB394758A true GB394758A (en) | 1933-07-06 |
Family
ID=9796164
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB543632A Expired GB394758A (en) | 1932-02-23 | 1932-02-23 | Improvements relating to electric spot welding machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB394758A (en) |
-
1932
- 1932-02-23 GB GB543632A patent/GB394758A/en not_active Expired
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