Hot-wire deposition device with extended focal-zone laser beam

Abstract

A hot-wire deposition device with an extended focal-zone laser beam includes a laser, a lens assembly, a deposition working surface and a wire feeding system. The laser is configured to emit a laser beam; the lens assembly is configured to transform the laser beam into an extended focal-zone laser beam, which transitions from an annular light spot to a continuous solid light spot in a space. The deposition working surface is configured to receive a projection of the extended focal-zone laser beam to obtain a solid or annular light spot and a molten pool formed by sustained heating of the light spot. The wire feeding system is configured to feed a wire along a preset path, making a tail end of the wire connected to the molten pool in the form of a liquid bridge after being preheated by the continuous solid light spot.

Dependencies are inferred from the claim text.