Alternating magnetic field assisted laser remanufacturing method under oblique angle

Abstract

The alternating magnetic field assisted laser remanufacturing method at an oblique angle includes: grinding and cleaning the area of ​​the part to be repaired; adjusting the position of the hand-held movable fixture so that the laser beam acts on the starting point of the area to be repaired; adjusting the current intensity in the magnetic supply coil and frequency, generate an alternating magnetic field with appropriate frequency and magnetic field strength to act on the surface of the part; select the appropriate laser repair and remanufacturing process parameters, turn on the laser to irradiate the laser beam on the surface to be repaired, and send it to the area to be repaired through the wire feeder According to the shape and size of the remanufacturing area of ​​the part, manually adjust the movable fixture to control the movement of the laser beam and the magnetic field action area, so as to realize the repair and remanufacture of the entire part to be repaired; turn off the laser, disconnect the AC power, and laser repair and remanufacture Manufacturing work is complete. The invention uses an alternating magnetic field to heat the solid metal around the molten pool to reduce the temperature gradient at the molten pool, and generates a supporting Lorentz force in the liquid molten pool to inhibit the molten pool from dripping.

Description

technical field [0001] The invention belongs to the technical field of laser remanufacturing, and in particular relates to an alternating magnetic field-assisted laser remanufacturing method at an oblique angle. Background technique [0002] As one of the advanced remanufacturing technologies, laser remanufacturing technology mainly uses laser cladding technology as the core technology to realize the repair and remanufacturing of parts failure areas. In the repaired and remanufactured area, the laser beam is irradiated with a certain intensity to melt the powder and a small part of the surface layer of the substrate at the same time. 2 ~10 6 °C / s) process, a technology that forms a cladding layer on the surface of the substrate with a low dilution rate, a thickness controllable within a certain range, and a metallurgical bond with the substrate. [0003] In the laser remanufacturing process, the general part is placed horizontally, the laser is located above the part, and ...

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Problems solved by technology

[0005] The present invention aims to solve the problem of molten metal dripping in the current laser repair and remanufacturing process of the side wall and upper inner wall of large parts and the problem of cracking in the laser repair and remanufacture area during rapid heating and cooling

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