Method and system of using consumable with weld puddle

Patent metadata

Field	Value
Publication number	US-10888944-B2
Application number	US-201715601550-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	Jul 6, 2012
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

A system for and a method of controlling filler wire is provided. The system includes a high intensity energy source configured to heat at least one workpiece to create a molten puddle on a surface of the at least one workpiece. A filler wire feeder is configured to feed a filler wire into said molten puddle, and a travel direction controller is configured to advance the high intensity energy source and the filler wire in a travel direction to deposit the filler wire on the at least one workpiece. The system also includes a filler wire controller configured to move the filler wire in at least a first direction during the feeding and advancing of the filler wire. At least the first direction is controlled to obtain a desired shape, profile, height, size, or an admixture of a bead formed by the molten puddle.

First claim

The invention claimed is:

1. A method of controlling filler wire, the method comprising:
heating at least one workpiece with a high energy heat source to create a molten puddle on a surface of said at least one workpiece, wherein said high energy heat source comprises a laser power supply;
feeding a filler wire into said molten puddle;
preheating said filler wire with a wire power supply prior to said filler wire entering said molten puddle;
advancing each of said high energy heat source and said filler wire in a travel direction to deposit said filler wire on said at least one workpiece;
moving said high energy heat source in at least a first direction during said advancing of said high energy heat source where said at least first direction is different from said travel direction;
controlling at least movement of said high energy heat source in said at least first direction to obtain a desired shape, profile, height, size, or an admixture of a bead formed by said molten puddle;
receiving, by a sensing and control unit, information from said laser power supply and said wire power supply;
controlling, by said sensing and control unit, movement of said filler wire in at least a second direction that is different from said travel direction to thereby control a rate of cooling of said molten puddle based on said information;
wherein said movement of said high energy heat source in said at least first direction includes at least one of a back and forth motion that is in-line with said travel direction, a circular motion, and an elliptical motion.

2. The method of claim 1 , wherein said high energy heat source comprises a laser which directs a laser beam onto said at least one workpiece to create said molten puddle.

3. The method of claim 2 , wherein movement of said laser beam in said at least first direction is synchronized with said controlling of said movement of said filler wire in said at least second direction.

4. The method of claim 2 , wherein movement of said laser beam in said at least first direction is independent of said controlling of said movement of said filler wire in said at least second direction.

5. The method of claim 1 , further comprising:
feeding a second filler wire into said molten puddle; and
advancing said second filler wire in said travel direction to deposit said second filler wire on said at least one workpiece,
moving said second filler wire in at least a third direction during said feeding of said second filler wire and said advancing of said second filler wire where said at least third direction is different from said travel direction, and wherein said at least third direction is a direction that is opposite that of said at least second direction,
wherein said controlling to obtain said desired shape, profile, height, size, or admixture of said bead formed by said molten puddle further comprises controlling movement of said second filler wire in said at least third direction, and
wherein said movement of said filler wire in said at least second direction and said movement of said second filler wire in said at least third direction includes at least one of a back and forth motion that is in-line with said travel direction, a circular motion, and an elliptical motion.

6. The method of claim 5 , wherein at least one of said controlling of said movement of said filler wire in said at least second direction and said controlling of said movement of said second filler wire in said at least third direction is synchronized with said controlling of said movement of said high energy heat source in said at least first direction.

7. The method of claim 6 , wherein at least one of said controlling of said movement of said filler wire in said at least second direction and said controlling of said movement of said second filler wire in said at least third direction is independent of said controlling of said movement of said high energy heat source in said at least first direction.

8. A system for controlling a filler wire, the system comprising:
a high intensity energy source which heats at least one workpiece to create a molten puddle on a surface of said at least one workpiece, wherein said high intensity energy source comprises a laser power supply;
a filler wire feeder which feeds a filler wire into said molten puddle;
a wire power supply which preheats said filler wire prior to said filler wire entering said molten puddle;
a travel direction controller which advances each of said high intensity energy source and said filler wire in a travel direction to deposit said filler wire on said at least one workpiece;
a high intensity energy source controller which moves said high intensity energy source in at least a first direction during said advancing of said high intensity energy source, where said at least first direction is different from said travel direction;
a filler wire controller which moves said filler wire in at least a second direction where said at least second direction is different from said travel direction; and
a sensing and control unit operatively connected to receive information from said laser power supply and said wire power supply, wherein said sensing and control unit is configured to control operations of the filler wire controller to thereby control a rate of cooling of said molten puddle based on said information,
wherein at least movement of said high intensity energy source in said at least first direction is controlled to obtain a desired shape, profile, height, size, or an admixture of a bead formed by said molten puddle, and
wherein said movement of said high intensity energy source in said at least first direction includes at least one of a back and forth motion that is in-line with said travel direction, a circular motion, and an elliptical motion.

9. The system of claim 8 , wherein said high intensity energy source comprises a laser which directs a laser beam onto said at least one workpiece to create said molten puddle.

10. The system of claim 9 , wherein movement of said laser beam in said at least first direction is synchronized with movement of said filler wire in said at least second direction.

11. The system of claim 9 , wherein movement of said laser beam in said at least first direction is independent of movement of said filler wire in said at least second direction.

12. The system of claim 8 , further comprising:
a second filler wire feeder which feeds a second filler wire to said molten puddle, said travel direction controller further configured to advance said second filler wire in said travel direction to deposit said second filler wire on said at least one workpiece; and
a second filler wire controller which moves said second filler wire in at least a third direction during said feeding of said second filler wire and said advancing of said second filler wire, where said at least third direction is different from said travel direction, and wherein said at least third direction is a direction that is opposite that of said at least second direction,
wherein controlling to obtain said desired shape, profile, height, size, or admixture of said bead formed by said molten puddle further comprises controlling movement of said second filler wire in said at least third direction, and
wherein movement of said filler wire in said at least second direction and said movement of said second filler wire in said at least third direction includes at least one of a back and forth motion that is in-line with said travel direction, a circular motion, and an elliptical motion.

13. The system of claim 12 , wherein at least one of said movement of said filler wire in said at least second directi

Assignees

• Lincoln Global Inc

Inventors

• Ash Elliott

Classifications

• B23K35/0261 Primary

  Rods, electrodes or wires · CPC title

• B23K26/211

  with interposition of special material to facilitate connection of the parts · CPC title

• B23K2101/34

  Coated articles {; Surface treated articles} · CPC title

• B23K26/34

  Laser welding for purposes other than joining · CPC title

• B23K26/14

  using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor (B23K26/12 takes precedence) · CPC title