IP Library › Granted Patent US 10,730,131
Granted Patent B2
US 10,730,131 · App. 15/683,947 · Granted Aug 4, 2020

Arc stop

Inventors: Per Aberg (Laxa, SE); Johan Toftling (Forsvik, SE); Mikael Pettersson (Gothenburg, SE); Jakob Lennartsson (Gothenburg, SE)
Assignee: ESAB AB
B23K9/0956B23K9/067B23K9/095B23K10/006
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Quick Facts
Patent No.
US 10,730,131
App. No.
15/683,947
Granted
Aug 4, 2020
Kind
B2
Abstract

Various embodiments may be generally directed to a welding system that monitors an output of the welding system to determine if an output arc should be extinguished or maintained. The welding system can compare an arc voltage output to a voltage threshold and a temporal threshold. When the arc voltage output exceeds the voltage threshold in an uninterrupted manner for the duration of the temporal threshold, an output weld current can be stopped. In turn, the output arc can be broken or extinguished. After a predetermined amount of time, the power source can be re-engaged to prepare for re-ignition of another arc. By tracking the amount of time the arc voltage output exceeds the predetermined threshold, a probability of unwanted arc outs can be reduced or minimized while still providing quick and reliable arc breaking when desired.

Claims (38)

1. A method, comprising:

monitoring an output arc voltage of a welding system;

comparing the output arc voltage to a voltage threshold level;

triggering a timer when the output arc voltage exceeds the voltage threshold level; and

stopping an output weld current of the welding system when a value of the timer exceeds a temporal threshold, otherwise maintain an output arc with the output weld current; wherein

the voltage threshold level and the temporal threshold are adjusted based on an expected current range.

2. The method of claim 1 , further comprising extinguishing the output arc in response to the output arc voltage exceeding the voltage threshold level for an uninterrupted period of time that is greater than the temporal threshold.

3. The method of claim 1 , wherein the voltage threshold level and the temporal threshold are adjusted statically.

4. The method of claim 1 , wherein the voltage threshold level and the temporal threshold are adjusted dynamically.

5. The method of claim 1 , wherein the voltage threshold level and the temporal threshold are adjusted based on a material to be welded.

6. The method of claim 1 , wherein the voltage threshold level and the temporal threshold are adjusted based on a welding process.

7. The method of claim 1 , wherein the voltage threshold level and the temporal threshold are adjusted based on a welding process to be implemented.

8. The method of claim 1 , wherein the voltage threshold level and the temporal threshold are adjusted based on an electrode used during a welding process.

9. The method of claim 1 , wherein the voltage threshold level and the temporal threshold are adjusted based on an output power.

10. The method of claim 1 , wherein the voltage threshold level and the temporal threshold are adjusted based on a user.

11. The method of claim 1 , wherein stopping the output weld current of the welding system comprises shutting down a power source.

12. The method of claim 11 , wherein the power source is turned back on after a predetermined delay.

13. A method comprising:

determining whether an output arc voltage of a welding system continuously exceeds a voltage threshold level for a temporal threshold interval;

when the output arc voltage is determined to continuously exceed the voltage threshold level for the temporal threshold interval:

stopping an output weld current of the welding system; and

when the output arc voltage fails to continuously exceed the voltage threshold level for the temporal threshold interval:

maintaining an output arc with the output weld current;

wherein the voltage threshold level and the temporal threshold interval are adjusted based on an expected current range.

14. The method of claim 13 , further comprising:

statically adjusting the voltage threshold level and the temporal threshold interval.

15. The method of claim 13 , further comprising:

dynamically adjusting the voltage threshold level and the temporal threshold interval.

16. The method of claim 13 , further comprising:

adjusting the voltage threshold level and the temporal threshold level interval based on a material to be welded.

17. The method of claim 13 , further comprising:

adjusting the voltage threshold level and the temporal threshold interval based on a welding process.

18. The method of claim 13 , further comprising:

adjusting the voltage threshold level and the temporal threshold interval based on an electrode used during a welding process.

19. The method of claim 13 , further comprising:

adjusting the voltage threshold level and the temporal threshold interval based on an output power.

20. The method of claim 13 , further comprising:

adjusting the voltage threshold level and the temporal threshold interval based on a consumable used during a particular welding process.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 15, 2020
From: ABERG, PER; TOFTLING, JOHAN; PETTERSSON, MIKAEL; LENNARTSSON, JAKOB
To: ESAB AB
Reel/Frame 052935/0094 →
Continuity (2)
Provisional Application 62382019 · Aug 31, 2016
Related Publication 20180056425A1 · Mar 1, 2018
Cited By (1)
US 12,708,954