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US 12,343,825 B2Granted
System for TIG shielding gas preflow, postflow, and arc starting
AssigneeIllinois Tool Works Inc.
InventorsZachary Joseph Erndt, Al J. DeCoster
Life of this patent
Estimating the term…
Abstract
A welding-type system for gas tungsten arc welding including control circuitry to control the initiation of a welding arc and the preflow and postflow of inert shielding gas based on sensed voltages.
Claims20
A welding-type system comprising:
- a welding-type torch holding an electrode;
- a welding-type power supply configured to output welding-type power to the welding-type torch to create a welding-type arc between the electrode and a workpiece, wherein the welding-type power supply comprises:
- control circuitry;
- and
- a sensor in communication with the control circuitry and the welding-type torch, wherein the control circuitry is configured to:
- control the welding-type power supply to disable output of the welding-type power based on an absence of a welding-type arc;
- detect a first electrical short circuit between the electrode and the workpiece;
- in response to the detection of the first electrical short circuit, control a shielding gas valve to enable a flow of shielding gas to the welding-type torch, the welding-type torch holding the electrode;
- detect a second electrical short circuit between the electrode and the workpiece;
- and
- control the welding-type power supply to output the welding-type power in response to the detection of the second electrical short circuit.
8 more elements
A welding-type system comprising:
- a welding-type torch holding an electrode;
- and
- a welding-type power supply comprising:
- a power circuit configured to output welding-type power to the welding-type torch to create a welding-type arc between the electrode and a workpiece;
- an arc initiation circuit configured to output an arc initiation output to the welding-type torch;
- control circuitry;
- and
- a sensor in communication with the control circuitry and the torch holding an electrode, wherein the control circuitry is configured to:
- control the power circuit of the welding-type power supply to disable output of the welding-type power based on an absence of a welding-type arc;
- detect an electrical short circuit between an electrode and the workpiece in an absence of the welding-type power, the welding-type torch holding the electrode;
- and
- based on the detection of the electrical short circuit, control the welding-type power supply to output the welding-type power and control the arc initiation circuit to output the arc initiation output.
9 more elements
A welding-type system comprising:
- a welding-type torch holding an electrode;
- and
- a welding-type power supply comprising:
- a power circuit configured to output welding-type power to the welding-type torch to create a welding-type arc between the electrode and a workpiece;
- an arc initiation circuit configured to output an arc initiation output to the welding-type torch
- control circuitry;
- and
- a voltage or current sensor in communication with the control circuitry and the torch holding an electrode, wherein the control circuitry is configured to:
- control the power circuit of the welding-type power supply to disable output of the welding-type power based on an absence of a welding-type arc;
- monitor a voltage or a current between the welding-type torch and the workpiece in an absence of the welding-type power;
- detect an electrical short circuit between an electrode and the workpiece in the absence of the welding-type power, the welding-type torch holding the electrode;
- detect termination of the electrical short circuit;
- and
- in response to the detection of the termination of the electrical short circuit, control the power circuit of the welding-type power supply to output the welding-type power and control the arc initiation circuit to output the arc initiation output.
11 more elements
Dependencies are inferred from the claim text.