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US 12,502,723 B2Granted
Two-channel device for two-frequency arc welding
OwnerShimon Vainerinventor
Life of this patent
Estimating the term…
Abstract
Methods and devices for two-channel welding arc ignition and, more particularly, to ionizing an area of a contact between an electrode and articles to be welded. Methods and devices for igniting an arc discharge and welding.
Claims10
A method of igniting an arc discharge and welding thereby;
- the method comprising steps of:
- a. providing a two-channel device for igniting an arc discharge and welding thereby;
- the two-channel device comprising:
- i. a first channel further comprising:
- 1) A power supply further comprising a power transformer;
- and
- 2) A controller of the power transformer configured to provide a reduced, arc-sustaining voltage and a full welding voltage;
- ii. a second channel further comprising:
- 1) A high-frequency generator;
- and
- 2) A resonant circuit connected in series to the high-frequency generator;
- iii. a current meter within the second channel, configured to measure a high-frequency current, wherein the measured high-frequency current provides an indication of a degree of ionization of a contact zone between an electrode and an article to be welded, and wherein the controller is configured to automatically apply the full welding voltage after a variable delay, the delay being determined in response to the measured high-frequency current;
- and
- iv. output terminals connectable to an electrode and a welding stand;
- the first and second channels are connectable to the output terminals in parallel;
- b. placing articles to be welded onto the welding stand;
- c. connecting the electrode and welding stand to the output terminals;
- d. contacting the electrode with at least one of the articles to be welded;
- e. applying a high-frequency voltage generated by the high-frequency generator to the electrode while simultaneously providing the reduced, arc-sustaining voltage from the power transformer, thereby causing a combined current from both channels to heat an area of contact;
- and
- f. after the variable delay, determined based on the measured high-frequency current, applying the full welding voltage from the power transformer to the electrode to establish a dual-frequency welding arc.
18 more elements
A two-channel device for igniting an arc discharge and welding thereby;
- the two-channel device comprising:
- a. a first channel further comprising:
- i. a power supply further comprising a power transformer;
- and
- ii. a controller configured to operate the power transformer initially at a reduced, arc-sustaining voltage, and subsequently to restore a full welding voltage;
- b. a second channel further comprising:
- i. a high-frequency generator;
- and
- ii. a resonant circuit connected in series with the high-frequency generator;
- and
- iii. a current meter configured to measure a high-frequency current associated with a contact zone between an electrode and an article to be welded;
- and
- c. output terminals connectable to an electrode and a welding stand, wherein said first and second channels are connected in parallel to the output terminals;
- wherein the controller is configured to restore the full welding voltage after a variable delay that is automatically determined in response to the measured high-frequency current, indicative of a degree of ionization of the contact zone, such that the high-frequency generator and the reduced-voltage power transformer operate concurrently to synergistically preheat and ionize the contact zone prior to initiation of the full welding arc.
11 more elements
Dependencies are inferred from the claim text.