Arc start

Patent metadata

Field	Value
Publication number	US-10875117-B2
Application number	US-201715682727-A
Country	US
Kind code	B2
Filing date	Aug 22, 2017
Priority date	Sep 1, 2016
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

Various embodiments may be generally directed to a welding system that can adjust parameters of a welding process that is restarted after an interruption. The adjusted parameters can account for the temperature of an electrode, parent material, and/or weld pool which may change during the interruption. The adjusted parameters can be optimized based on these temperatures to enhance the quality and reliability of the weld as it restarts.

First claim

What is claimed is:

1. A manual metal arc (MMA) welding system, comprising:
a temperature determination module to determine, from among a plurality of possible temperature categories, a temperature category of an MMA electrode during an interruption to an MMA welding process on a workpiece based on a comparison of information indicative of a duration of the interruption to one or more timing thresholds; and
a parameter optimization module to set one or more current parameters of the MMA welding process based on the temperature category of the MMA electrode determined by the temperature determination module, wherein the one or more current parameters includes a rise time, a rise time constant, or a ramp up time of an output current subsequent to the MMA electrode contacting the workpiece after the interruption.

2. The MMA welding system of claim 1 , wherein the duration of the interruption comprises an amount of time since a last weld.

3. The MMA welding system of claim 1 , wherein the duration of the interruption comprises an amount of time since an output current was provided.

4. The MMA welding system of claim 1 , wherein the plurality of temperature categories includes a warm electrode category and a cool electrode category.

5. The MMA welding system of claim 1 , wherein the one or more current parameters further include a time delay measured from a time when the MMA electrode contacts the workpiece to a start of a current increase, wherein a duration of the time delay is a function of the temperature category of the MMA electrode.

6. The MMA welding system of claim 1 , wherein the one or more current parameters further include a ramp up filter coefficient for the output current.

7. The MMA welding system of claim 1 , wherein the one or more current parameters further include a current level for the output current.

8. A manual metal arc (MMA) welding method, comprising:
receiving information indicative of a duration of an interruption to a welding process involving an MMA electrode and a workpiece;
determining, from among a plurality of possible temperature categories, a temperature category of the MMA electrode based on a comparison of the received information indicative of the duration of the interruption to one or more timing thresholds;
setting one or more current parameters of the welding process based on the determined temperature category of the MMA electrode, the one or more current parameters including a rise time, a rise time constant, or a ramp up time of an output current subsequent to the MMA electrode contacting the workpiece after the interruption; and
providing the one or more current parameters to one or more components of a welding system to adjust operation of the welding system for the welding process.

9. The MMA welding method of claim 8 , wherein the one or more current parameters further include a time delay measured from a time when the MMA electrode contacts the workpiece to a start of a current increase, wherein a duration of the time delay is a function of the temperature category of the MMA electrode.

10. The MMA welding method of claim 8 , wherein the one or more current parameters further include a ramp up filter coefficient for the output current.

11. The MMA welding method of claim 8 , wherein the one or more current parameters include a current level of the output current.

Assignees

• Esab Ab

Inventors

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

Classifications

• B23K9/095

  Monitoring or automatic control of welding parameters · CPC title

• B23K10/006

  Control circuits therefor · CPC title

• B23K9/067 Primary

  Starting the arc · CPC title

• B23K9/0956

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