Shielding-free laser-path-coaxial powder conveying method and shielding-free laser-path-coaxial powder conveying device

A coaxial powder feeding and unshielded technology, which is applied in the direction of improving process efficiency and energy efficiency, can solve the problems of burning wire feeding tube and wire feeding device failure, and achieve the effect of avoiding burning and failure

Active Publication Date: 2015-06-03
HUNAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

This method realizes the complete coaxiality of the focused beam and the feeding material, but the wire feeding tube needs to cross the beam when it reaches the hollow area from the outside of the ring cone beam, and when the laser is irradiated on the light-facing surface of the wire

Method used

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  • Shielding-free laser-path-coaxial powder conveying method and shielding-free laser-path-coaxial powder conveying device
  • Shielding-free laser-path-coaxial powder conveying method and shielding-free laser-path-coaxial powder conveying device
  • Shielding-free laser-path-coaxial powder conveying method and shielding-free laser-path-coaxial powder conveying device

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Embodiment Construction

[0038] A coaxial powder feeding method without shielding the laser light path, which mainly divides the incident laser beam into several reflective areas and non-laser areas through a certain method, such as figure 1 , 2 As shown, the laser is divided in this way by the arc conoscopic mirror composed of two inferior arcs. The light beam in the reflective area is focused by the ring focus lens to form a ring cone beam and finally converges on the substrate, while in the non-laser area because there is no laser beam, there will be no laser beam from the plane where the ring focus lens is located to the plane where the substrate is located. Several segments of approximately cone-shaped laser-free areas appear. image 3 for figure 1 The optical path cross-section of the plane at the dotted line, given by image 3 As shown, there is a laser-free region in the plane where no laser passes through at both ends. Thus, if Figure 4 As shown, the feeding pipeline located outside the...

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Abstract

The invention discloses a shielding-free laser -path-coaxial powder conveying method and a shielding-free laser-path-coaxial powder conveying device. The shielding-free laser-path-coaxial powder conveying method includes the steps of (1) forming a non-laser area and a laser area in an optical path formed by the fact that a laser beam is focused on a base material focus point via an annular reflecting and focusing mirror; (2) arranging a powder conveying pipe, which is used for conveying powder materials to the base material focus point, in the non-laser area to be kept away from laser radiation, and enabling a spraying nozzle of the powder conveying pipe to be coaxial with the center of the laser beam. The shielding-free laser-path-coaxial powder conveying method and the shielding-free laser-path-coaxial powder conveying device have the advantages that the powder conveying pipe is kept away from direct radiation of high-power laser and prevented from being damaged, and complete coaxiality of the laser and powder conveying is achieved.

Description

technical field [0001] The invention relates to the fields of laser powder forming and manufacturing and laser cladding, in particular to a coaxial powder feeding method and a powder feeding device without shielding the laser light path. Background technique [0002] With the development of science and technology, laser cladding forming technology is more and more widely used in the production process. Laser cladding forming refers to the metal raw material (powder or wire) which is melted and transported by laser under the direct drive of CAD model, which is scanned, melted and piled up layer by layer to directly form dense metal parts. One of the most critical technologies in this forming is how to deliver the laser and the material to be processed to the processing area synchronously for optical material coupling forming. [0003] The existing feeding methods are divided into two types: optical external oblique axis feeding and optical internal coaxial feeding. [0004]...

Claims

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Application Information

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IPC IPC(8): B22F3/105
CPCY02P10/25
Inventor 张屹李福南
Owner HUNAN UNIV
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