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US 9,937,580 B2Granted
Method and system for additive manufacturing using high energy source and hot-wire
AssigneeLincoln Global, Inc.
InventorsSteven R Peters, Paul E Denney, Badri Narayanan, Dionysus Damato, Michael Whitehead
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Abstract
A method and system to manufacture workpieces employing a high intensity energy source to create a puddle and at least one resistively heated wire which is heated to at or near its melting temperature and deposited into the puddle as droplets.
Claims19
An additive manufacturing system, comprising:
- a high energy device which irradiates a surface of a workpiece with a high energy discharge to create first and second molten puddles on a surface of said workpiece;
- a first power supply which supplies a first heating signal to a first wire where said first heating signal comprises a plurality of first current pulses and where each of said first current pulses of said first heating signal creates a molten droplet on a distal end of said first wire which is deposited into said first puddle;
- and
- a second power supply which supplies a second heating signal to a second wire where said second heating signal comprises a plurality of second current pulses and where each of said second current pulses of said second heating signal creates a molten droplet on a distal end of said second wire which is deposited into said second puddle;
- and
- wherein each of said first current pulses reaches a peak current level after said distal end of said first wire contacts said first puddle,
- wherein said first heating signal has no current in between said plurality of said first current pulses;
- wherein said first wire is retracted such that said distal end of said first wire is not in contact with said first puddle between subsequent peak current levels of said first current pulses;
- wherein said first power supply controls said first heating current such that no arc is created between said first wire and said work piece during said first current pulses;
- and
- wherein said first and second molten puddles are distinct molten puddles.
8 more elements
An method of additive manufacturing, comprising:
- irradiating a surface of a workpiece with a high energy discharge to create first and second molten puddles on a surface of said workpiece;
- supplying a first heating signal to a first wire where said first heating signal comprises a plurality of first current pulses and where each of said first current pulses of said first heating signal creates a molten droplet on a distal end of said first wire which is deposited into said first puddle;
- and
- supplying a second heating signal to a second wire where said second heating signal comprises a plurality of second current pulses and where each of said second current pulses of said second heating signal creates a molten droplet on a distal end of said second wire which is deposited into said second puddle;
- and
- wherein each of said first current pulses reaches a peak current level after said distal end of said first wire contacts said first puddle,
- wherein said first heating signal has no current in between said plurality of said first current pulses;
- wherein said first wire is retracted such that said distal end of said first wire is not in contact with said first puddle between subsequent peak current levels of said first current pulses;
- wherein said first heating current is controlled such that no arc is created between said first wire and said workpiece during said first current pulses;
- and
- wherein said first and second molten puddles are distinct molten puddles.
8 more elements
Dependencies are inferred from the claim text.