Laser-cladding forming process and laser-cladding forming device for curvature solid piece

Abstract

The invention discloses a laser-cladding forming process and a laser-cladding forming device for a curvature solid piece. The laser-cladding forming process comprises the following steps: S1, setting initial negative defocus of a laser-cladding head, and controlling a matrix material to be located at an initial negative defocus position; S2, controlling a ring conical focused laser beam, a powder feeding beam in the laser beam and collimation air to be emitted coaxially; S3, controlling a posture of the laser-cladding head, performing overlapping cladding on all cladding track layers from inside to outside along a radius direction of the curvature solid piece, wherein all the cladding track layers formed by the overlapping cladding form a cladding layer, and in an overlapping cladding process of the cladding layer, the negative defocus amount of the laser-cladding head is reduced gradually along with the progress of the overlapping cladding; and S4, repeating the steps S2 and S3 until the curvature solid piece is totally formed. According to the laser-cladding forming process for the curvature solid piece, disclosed by the invention, on the basis of hollow laser and an inside-laser powder feeding technology, unequal height overlapping is performed aiming at the problem that the arc length of the inner side is inconsistent with that of the outer side in the overlapping process of the curvature solid piece.

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

Images