Laser cladding forming process and device for curvature solid parts

Abstract

The invention discloses a laser cladding forming process and device for a curvature solid part, wherein the laser cladding forming process includes the following steps: S1, setting the initial negative defocus of the laser cladding head, controlling the base material to be located in the Initial negative defocus position; S2, control the cone-shaped focused laser beam, the powder feeding beam inside the laser beam and the collimated gas, coaxial exit; S3, control the attitude of the laser cladding head, along the radius direction of the curvature solid part, Each melt channel layer is overlapped and clad layer by layer from the inside to the outside. Each melt channel layer formed by lap cladding forms a layer of cladding layer. During the lap cladding process of a layer of cladding layer, the laser cladding head The negative defocus amount of is gradually reduced as the lap cladding proceeds; S4, repeating steps S2 and S3, until the curvature solid part is completely formed. The laser cladding forming process of curvature solid parts of the present invention is based on hollow laser and optical internal powder feeding technology, and aims at the problem of inconsistency of inner and outer arc lengths during the lapping process of curvature solid parts to carry out unequal lap joints.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular to a laser cladding forming process and device for a curvature solid part. Background technique [0002] Laser cladding 3D forming has broad development prospects, and can quickly form parts with complex structures. At present, relatively mature laser cladding rapid manufacturing processes include: laser selective melting technology (SLM) and laser metal deposition technology (LMD). [0003] However, the above two forming processes overlap and stack along the horizontal normal direction, making it difficult to form complex parts with overhanging structures. Moreover, when the general laser cladding lapping technology is lapped along the formed surface, it cannot overcome the problem of inconsistent arc lengths of the inner and outer layers for the forming of curvature solid parts. [0004] Specifically, such as figure 1 As shown, the general laser cladding process is lappe...

AI Technical Summary

Problems solved by technology

In this way, during the stacking and lapping process of curvature parts, if the increment of each layer is h, the growth of the outer layer will not reach H, which will lead to defects in the forming of the workpiece

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