GB1489773A - Resistance welding apparatus affording operator protectio - Google Patents
Resistance welding apparatus affording operator protectioInfo
- Publication number
- GB1489773A GB1489773A GB4198874A GB4198874A GB1489773A GB 1489773 A GB1489773 A GB 1489773A GB 4198874 A GB4198874 A GB 4198874A GB 4198874 A GB4198874 A GB 4198874A GB 1489773 A GB1489773 A GB 1489773A
- Authority
- GB
- United Kingdom
- Prior art keywords
- welding
- electrode
- detection device
- chamber
- force
- 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
- B23K11/25—Monitoring devices
- B23K11/251—Monitoring devices using analog means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
1489773 Welding by pressure BRITISH LEYLAND UK Ltd 24 Sept 1975 [26 Sept 1974] 41988/74 Heading B3R [Also in Division G3] Resistance welding apparatus features a power-driven movable electrode E1 and a stationary electrode E2, the former being advanced towards the electrode E2 initially by a first non-welding force, i.e. a force low enough to be resisted by an operator's hand, and then by a second, higher, welding force, the switch from the first to second forces occurring when a low voltage induced in the secondary windings of a welding transformer T is short-circuited by the electrodes E1, E2 through the workpiece (not shown). In operation, the electrode E2 is advanced in the first non-welding mode, by a pneumatic piston actuator P, when two valves AV2, AV3 are energized (dotted lines, Fig. 2). Since the piston of the actuator has a greater effective area in chamber P2 than in chamber P1, the piston is moved downwardly, governed also by the relation between two pressure regulators RR1, RR2, such that the descent may be arrested by an inadvertently placed non- conducting obstruction. When the electrode E1 contacts the workpiece a Detection Device (Fig. 1) detects the short-circuit of the low voltage induced in the secondary winding, by a Low Voltage Source (Fig. 1), so triggering the energization of valve AV1 through a Welding Controller) and, immediately following, the deenergization of the valves AV2, AV3. Compressed air is then supplied at its full pressure to the chamber P2, resulting in a large welding force between the electrodes E1, E2. The welding current is switched on simultaneously by the Detection Device triggering the Welding Controller, which subsequently operates to close a Weld-time Control Switch to connect a 400 V. power supply to the primary winding of the transformer T. The operation can be repeated continually if an initiation switch in the Detection Device is kept closed. If the compressed air supply fails, the electrode E1 will descend under its own weight, retarded by the air trapped in the chamber P1 being relieved through the regulator RR1. An electronic circuit (Fig. 3, not shown) of the Detection Device is disclosed.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4198874A GB1489773A (en) | 1974-09-26 | 1974-09-26 | Resistance welding apparatus affording operator protectio |
US05/617,085 US4041272A (en) | 1974-09-26 | 1975-09-26 | Resistance welding apparatus affording operator protection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4198874A GB1489773A (en) | 1974-09-26 | 1974-09-26 | Resistance welding apparatus affording operator protectio |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1489773A true GB1489773A (en) | 1977-10-26 |
Family
ID=10422310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4198874A Expired GB1489773A (en) | 1974-09-26 | 1974-09-26 | Resistance welding apparatus affording operator protectio |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1489773A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109623245A (en) * | 2019-01-14 | 2019-04-16 | 安徽明天氢能科技股份有限公司 | A kind of hydrogen fuel cell bipolar plates full automatic welding welding fixture |
-
1974
- 1974-09-26 GB GB4198874A patent/GB1489773A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109623245A (en) * | 2019-01-14 | 2019-04-16 | 安徽明天氢能科技股份有限公司 | A kind of hydrogen fuel cell bipolar plates full automatic welding welding fixture |
CN109623245B (en) * | 2019-01-14 | 2024-02-09 | 安徽明天氢能科技股份有限公司 | Full-automatic welding fixture for bipolar plate of hydrogen fuel cell |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4504773A (en) | Capacitor discharge circuit | |
US4598330A (en) | High power direct current switching circuit | |
US3136880A (en) | Condenser discharge stud welding apparatus | |
US2441822A (en) | Condenser charging and discharging system | |
CA1150781A (en) | Constant current welding power supply with an upslope starting current | |
GB1489773A (en) | Resistance welding apparatus affording operator protectio | |
US3883714A (en) | D. C. power supply for arc welding with SCR controlling three-phase power | |
US4041272A (en) | Resistance welding apparatus affording operator protection | |
US2508103A (en) | Condenser welding system | |
EP0011958A1 (en) | DC contactor with solid state arc quenching | |
US3423560A (en) | Stored energy electric stud welding apparatus | |
US2785346A (en) | Interval timer | |
US2802146A (en) | Electric discharge apparatus | |
US4788025A (en) | Power source for nuclear fusion reactor | |
US3313912A (en) | Energy limiting system for stud welding | |
US2967227A (en) | Control circuit | |
US2742552A (en) | Apparatus for electric resistance welding of scaly metals | |
US2648749A (en) | Electronic sequence control, particularly for travel head seam welders | |
US2303500A (en) | Welder control | |
US2491975A (en) | Half cycle detector for electronic controls | |
US2411358A (en) | Control circuit | |
US4339652A (en) | Power supply for percussion welding | |
JPS5888059A (en) | Method for intercepting high voltage in electrostatic coater | |
US3469060A (en) | Contact synchronizing welding circuit | |
US2529198A (en) | Chuck magnetizing and demagnetizing control system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |