System and method for hot wire arc steering

Patent metadata

Field	Value
Publication number	US-10399172-B2
Application number	US-201615343951-A
Country	US
Kind code	B2
Filing date	Nov 4, 2016
Priority date	Jun 26, 2013
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The invention described herein generally pertains to a system and method related to influencing a direction of an arc within a welding operation. Within a hot wire welding operation, an arc is generated between an electrode and a workpiece and a welding wire is energized while being supplied to a puddle formed by the electrode in order to deposit the liquefied welding wire onto the workpiece. A welder system and/or method is provided that controls a direction of the arc based on at least one of a polarity of the welding wire (via a power supply that energizes the welding wire), a location of the welding wire in proximity to the arc, a synchronization and/or de-synchronization of a polarity of the welding wire with the electrode, an activation and/or a de-activation of energizing of the welding wire, or a combination thereof.

First claim

What is claimed is:

1. A welding system, comprising:
an electrode;
a welding power source configured to supply a welding output to the electrode to create an arc between the electrode and a workpiece;
a hot wire power source configured to energize and heat a wire with an alternating current, wherein the wire is positioned in proximity to the arc such that the alternating current that heats the wire simultaneously generates a magnetic influence capable of deflecting the arc; and
a controller configured to adjust one or more parameters of the alternating current to generate at least one of a positive bias or a negative bias in a polarity of the alternating current.

2. The welding system of claim 1 , wherein the one or more parameters includes a balance of the alternating current, and
wherein the controller is further configured to increase or decrease the balance of the alternating current to effect the positive bias or the negative bias, respectively.

3. The welding system of claim 1 , wherein the one or more parameters includes an offset of the alternating current, and
wherein the controller is further configured to increase or decrease the offset of the alternating current to effect the positive bias or the negative bias, respectively.

4. The welding system of claim 1 , further comprising an oscillator configured to oscillate at least one of the electrode or the arc transverse to a weld direction, wherein the controller is configured to synchronize adjustments to the one or more parameters of the alternating current with an oscillation of the at least one of the electrode or the arc such that at least one of a balance or an offset of the alternating current occurring at a center position of the oscillation is different from said at least one of a balance or an offset occurring at an edge position of the oscillation.

5. The welding system of claim 4 , wherein the controller is further configured to synchronize changes to the welding output supplied by the welding power source with the oscillation of the at least one of the electrode or the arc.

6. A welding system, comprising:
an electrode;
a welding power source configured to supply a welding output to the electrode to create an arc between the electrode and a workpiece;
a wire power source configured to energize a wire with an alternating current, wherein the wire is positioned in proximity to the arc such that the alternating current generates a magnetic influence capable of deflecting the arc;
a controller configured to adjust one or more parameters of the alternating current to generate at least one of a positive bias or a negative bias in a polarity of the alternating current; and
an oscillator configured to oscillate at least one of the electrode or the arc transverse to a weld direction,
wherein the controller is further configured to synchronize adjustments to the one or more parameters of the alternating current with an oscillation of the at least one of the electrode or the arc, and
wherein the controller is further configured to adjust the alternating current to a first polarity bias at a first position of the oscillation and to adjust the alternating current to a second polarity bias at a second position of the oscillation, wherein the first position is a center position of the oscillation and the second position is an edge position of the oscillation.

7. The welding system of claim 6 , wherein the welding power source is further configured to increase the welding output at the edge position of the oscillation relative to the center position of the oscillation.

8. A welding system, comprising:
an electrode;
a welding power source configured to supply a welding output to the electrode to create an arc between the electrode and a workpiece;
a wire power source configured to energize a wire with an alternating current, wherein the wire is positioned in proximity to the arc such that the alternating current generates a magnetic influence capable of deflecting the arc;
a controller configured to adjust one or more parameters of the alternating current to generate at least one of a positive bias or a negative bias in a polarity of the alternating current; and
an oscillator configured to oscillate at least one of the electrode or the arc transverse to a weld direction, wherein the controller is further configured to synchronize changes to the welding output supplied by the welding power source with an oscillation of the at least one of the electrode or the arc.

9. A method, comprising:
supplying a welding output to an electrode of a welding system to create an arc between the electrode and a workpiece;
energizing a wire positioned in proximity to the electrode with an alternating current to generate a magnetic influence capable of deflecting the arc;
controlling one or more parameters of the alternating current to generate at least one of positive bias or a negative bias in a polarity of the alternating current to effect control of the magnetic influence deflecting the arc;
oscillating at least one of the electrode or the arc transverse to a weld direction;
synchronizing adjustments to the one or more parameters of the alternating current with the oscillating of the at least one of the electrode or the arc; and
adjusting the alternating current to a first polarity bias at a first position of the oscillation and adjusting the alternating current to a second polarity bias at a second position of the oscillation, wherein the first position is a center position of the oscillation and the second position is an edge position of the oscillation.

10. The method of claim 9 , wherein controlling the one or more parameters of the alternating current comprises increasing or decreasing a balance of the alternating current to generate the positive bias or the negative bias, respectively.

11. The method of claim 9 , wherein controlling the one or more parameters of the alternating current comprises increasing or decreasing an offset of the alternating current to generate the positive bias or the negative bias, respectively.

12. A welding system, comprising:
an electrode;
an oscillator configured to oscillate the electrode in a direction transverse to a weld direction;
a welding power source configured to supply a welding output to the electrode to create an arc between the electrode and a workpiece;
a wire power source configured to energize a wire with an alternating current, wherein the wire is positioned in proximity to the arc such that the alternating current generates a magnetic influence capable of deflecting the arc; and
a controller configured to adjust, synchronous with an oscillator of the electrode, one or more parameters of the alternating current to generate at least one of positive bias or a negative bias in a polarity of the alternating current, wherein the controller is configured to increase at least one of a balance or an offset of the alternating current when the electrode is at a center position of the oscillation.

13. The welding system of claim 12 , wherein the controller is configured to decrease at least one of the balance or the offset of the alternating current when the electrode is at an edge position of the oscillation.

Assignees

• Lincoln Global Inc

Inventors

• Cole Stephen R
• Peters Steven R

Classifications

• B23K9/08 Primary

  Arrangements or circuits for magnetic control of the arc · CPC title

• B23K9/1675

  making use of several electrodes · CPC title

• B23K9/167

  and of a non-consumable electrode · CPC title

• B23K9/124

  Circuits or methods for feeding welding wire · CPC title

• B23K9/0737

  Stabilising of the arc position · CPC title