Arc stop

Patent metadata

Field	Value
Publication number	US-10730131-B2
Application number	US-201715683947-A
Country	US
Kind code	B2
Filing date	Aug 23, 2017
Priority date	Aug 31, 2016
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

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.

First claim

What is claimed is:

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.

Assignees

• Esab Ab

Inventors

• Aberg Per
• Toftling Johan
• Pettersson Mikael
• Lennartsson Jakob

Classifications

• B23K9/095 Primary

  Monitoring or automatic control of welding parameters · CPC title

• B23K10/006

  Control circuits therefor · CPC title

• B23K9/0956 Primary

  using sensing means, e.g. optical · CPC title

• B23K9/067

  Starting the arc · CPC title