Rotating magnetic field assisted laser cladding head

Abstract

A rotating magnetic field assisted laser cladding head comprises a first sleeve coaxially arranged with a laser optical path and a nozzle provided with a central through hole. The lower end of the first sleeve is connected with the upper end face of the nozzle, and a powder feeding pipe is arranged on the inner wall of the first sleeve. The nozzle is in a rotating body shape, the lower part of thenozzle is in a big-end-up circular truncated cone shape, a powder feeding channel is formed in the nozzle, and the powder feeding channel is in a hollow cone ring shape. The outer wall of the first sleeve is connected with a stepping motor and the stepping motor drives a pinion. The outer wall of the first sleeve is connected with a third sleeve through a built-in bearing, the third sleeve is provided with a large gear, and the large gear meshes with the pinion. A plurality of magnetic field generating devices are installed on the outer side of the third sleeve, and permanent magnet blocks ofthe magnetic field generating devices are close to an annular nozzle outlet of the nozzle. By means of the laser cladding head, synchronous coupling of a rotating magnetic field / static magnetic fieldand a laser cladding molten pool can be achieved, multi-angle rotating magnetic field / static magnetic field laser cladding can be achieved, and fluid movement, internal particle distribution and cladding defects of the cladding molten pool are effectively controlled.

Description

technical field [0001] The invention provides a rotating magnetic field cooperative laser cladding device, in particular a rotating magnetic field generating device for multi-angle additive manufacturing of laser on-site microstructure and performance optimization, belonging to the technical field of material additive manufacturing equipment. Background technique [0002] With the development of laser additive manufacturing technology in recent years, this technology has been further widely used in aviation, machinery, metallurgy, mining and other fields, and it also puts forward higher requirements for additive structure, mechanical properties and defects. However, due to the characteristics of rapid cooling, large temperature gradient of molten pool and non-equilibrium solidification in laser manufacturing, it is difficult to obtain a uniform manufacturing layer. attention. In particular, it is pointed out that due to the stirring effect of the rotating magnetic field, it...

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Problems solved by technology

[0003] To sum up, although the application of selective rotation magnetic field has been realized at present, most of them are applied in the form of coil windings. Under long-term working conditions, their own cooling needs to be considered, which will inevitably lead to an increase in the weight of the device and the complexity of the structure.

In addition, the existing equipment has to face the problem of device weight. In order to overcome the above shortcomings, this application uses permanent magnets as the magnetic source, and invented a mechanical lightweight rotating magnetic field cladding device, which can realize flexible follow-up Laser multi-angle processing

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