权利要求：
CLAIMS What is claimed is: 1. A laser welding device, comprising: a laser generator configured to generate welding-type lasing power; a lens to focus the welding-type lasing power at a focal point on a workpiece to generate a puddle during a welding-type additive manufacturing operation; a wire feeder configured to feed wire to the puddle generated by the laser generator; and a laser scanner to control the lens to move the focal point of the welding- type lasing power in multiple dimensions over the workpiece during the welding-type additive manufacturing operation.
2. The laser welding device as defined in claim 1, wherein the laser scanner is configured to move the focal point in a circle, an ellipse, a zigzag, a figure-
8. a crescent, a triangle, a square, a rectangle, a non-linear pattern, an asymmetrical pattern, a pause, or any combination thereof.
3. The laser welding device as defined in claim 2, wherein the movement of the focal point and relative movement between the workpiece and the laser scanner cause the lasing power to trace a superimposed pattern over the workpiece.
4. The laser welding device as defined in claim 1, wherein the laser scanner comprises a remote scan head with reflective optics or a rotary wedge scanner with transmissive optics.
5. The laser welding device as defined in claim 1, wherein the laser scanner is configured to move the focal point such that energy distribution across the weld is changed, thereby a controllable thermal gradient and a controllable cooling rate is created in the puddle by the welding-type laser power.
6. The laser welding device as defined in claim 1, wherein the laser scanner is configured to oscillate the focal point laterally across a weld path and longitudinally in a direction parallel to the weld path.
7. The laser welding device as defined in claim 1, wherein the laser scanner is configured to move the focal point to agitate the puddle. 8. The laser welding device as defined in claim 1, wherein the laser generator or the laser scanner are to adjust, based on a location of the focal point with respect to a reference point or feedback indicating a gap size in the workpiece, at least one of a lasing power level, a rotation speed of the laser scanner, or a size of a focal area in which the focal point is limited.
9. The laser welding device as defined in claim 1, wherein the laser generator is to generate the welding-type lasing power to perform welding or cladding.
10. The laser welding device as defined in claim 1, wherein the laser scanner is configured to cause the focal point to traverse the wire during a start of the welding-type operation such that the welding-type lasing power severs a portion of the wire, the wire feeder being oriented to feed the wire such that the severed portion of the wire falls into the puddle.
11. The laser welding device as defined in claim 1, wherein the laser generator is configured to generate the welding-type lasing power based on a lasing power waveform, and the laser scanner is configured to control the lens to move the focal point in synchrony with the lasing power waveform.
12. The laser welding device as defined in claim 11, wherein the laser generator and the laser scanner are configured to apply more welding-type lasing power to a first portion of the workpiece than to a second portion of the workpiece, the first and second portions of the workpiece being separated laterally and being at least partially coextensive longitudinally.
13. The laser welding device as defined in claim 1, further comprising a wire heater configured to preheat the wire at a location in a wire feed path that is prior to the wire tip.
14. A method to perform welding, the method comprising: generating lasing power with a laser generator during an additive manufacturing operation; focusing the lasing power at a focal point on a workpiece using a lens to generate a puddle during the additive manufacturing operation; feeding wire to the puddle generated using the lasing power during the additive manufacturing operation; and controlling the lens with a laser scanner to move the focal point of the lasing power in multiple dimensions over the workpiece during the additive manufacturing operation.
15. The method as defined in claim 14, wherein controlling the lens with the laser scanner comprises controlling a remote scan head with reflective optics or a rotary wedge scanner with transmissive optics.
16. The method as defined in claim 14, wherein the controlling of the lens comprises moving the focal point in a circle, an ellipse, a zigzag, a figure-8, a transverse reciprocating line, a crescent, a triangle, a square, a rectangle, a non-linear pattern, an asymmetrical pattern, a pause, or any combination thereof.
17. The method as defined in claim 14, further comprising preheating the wire during the welding or cladding operation with a wire heater at a location in a wire feed path that is prior to the wire tip.
18. The method as defined in claim 14, further comprising adjusting, based on a location of the focal point with respect to a reference point or feedback indicating a gap size in the workpiece, at least one of a lasing power level, a rotation speed of the laser scanner, or a size of a focal area in which the focal point is limited.
19. The method as defined in claim 14, wherein the controlling of the lens comprises moving the focal point to create a controllable heat gradient and a controllable cooling rate in the puddle by the lasing power.
20. The method as defined in claim 14, wherein the generating of the lasing power comprises generating the lasing power based on a lasing power waveform, and the controlling of the lens to move the focal point comprises moving the focal point in synchrony with the lasing power waveform.