http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1001776-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3492a7406879265b1f567f37d98dbbaf |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B23K9-007 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23K9-007 |
| filingDate | 1963-07-24^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1965-08-18^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1001776-A |
| titleOfInvention | Arc welding apparatus |
| abstract | 1,001,776. Control circuits for arc welding apparatus; control of D.C. motors. WESTING- HOUSE ELECTRIC CORPORATION. July 24, 1963 [Aug. 13, 1962], No. 29266/63. Headings H2H and H2J. [Also in Division B3] In consumable electrode arc welding apparatus a common control is provided for selecting the duration of the welding arc and the electrode feed rate. The common control may simultaneously select the welding voltage. In this way when making a number of spot welds or seam welds of timed duration on work of varying thickness or different material, the appropriate welding parameters are selected by a single control. The control circuit, the electrode feed unit and the work feed unit are supplied by A.C. lines AL1, AL2 and the welding supply unit is fed by a 3-phase supply L1, L2, L3. The armature A of the electrode feed motor M is in series with a thyratron 1TU the grid 265 of which is connected to a phase shift circuit including a variable resistor P3. The current through the thyratron 1TU and so the speed of motor M is regulated by a composite bias applied to the phase shift circuit and derived from the potential across a condenser C charged by a voltage proportional the voltage across AL1, AL2, the potential across resistor 1P or 2P during welding or across resistor P4 during arc striking or inching and the combined volt drop across the armature A and a series resistor R13. Welding is started by a switch SWS which actuates relay 5CR and if a water pressure switch PWS is closed relay 1CR connects welding voltage to the electrode E, solenoids VW and VG connect up water and shielding gas and relay 2CR energizes the motor M to feed the electrode E at inching speed. When the arc strikes relays 3CR, 2TD1 actuate in turn to connect resistor 1P in place of P4 to cause motor M to assume welding speed, to energize the work feed unit if in circuit and to interrupt the charging circuit for a timing condenser 4C which discharges through a resistance DR1. After the weld is completed the potential across condenser 4C allows thyratron V1 to fire and energize relay 2TD. A second timer 1TD is actuated and 2CR is released to apply a braking resistor across the armature to stop the electrode feed. The arc burns back until timer 1TD operates its contacts to disconnect the work feed unit and to release the actuated relays. Resetting of the welding voltage, electrode feed rate and arc duration is effected by a switch S1 which energizes a relay CR1 to connect resistors 2P and DR2 in place of 1P and DR1 and actuate a voltage control relay Ml in the welding supply unit. The apparatus may be used for repetition spot or seam welds. Specification 913,565 is referred to. |
| priorityDate | 1962-08-13^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419512635 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID962 |
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