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US 2020/0139472 A1Published application
System for tig shielding gas preflow, postflow, and arc starting
AssigneeIllinois Tool Works Inc.
InventorsZachary Joseph Erndt, Al J. DeCoster
Life of this patent
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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 power supply configured to output welding-type power to a welding-type torch;
- and
- control circuitry 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 an electrode and a 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.
6 more elements
A welding-type system comprising:
- a welding-type power supply configured to output welding-type power to a welding-type torch;
- an arc initiation circuit configured to output an arc initiation output to the welding-type torch;
- and
- control circuitry 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 an electrical short circuit between an electrode and a workpiece, 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.
5 more elements
A welding-type system comprising:
- a welding-type power supply configured to output welding-type power to a welding-type torch;
- an arc initiation circuit configured to output an arc initiation output to the welding-type torch;
- and
- control circuitry 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 an electrical short circuit between an electrode and a workpiece, 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 welding-type power supply to output the welding-type power and control the arc initiation circuit to output the arc initiation output.
6 more elements
Dependencies are inferred from the claim text.