Acoustic-magnetic coupling field assisted liquid jet polishing device for metal additive manufacturing parts

The invention belongs to the field of additive manufacturing surface treatment, and relates to an acoustic-magnetic coupling field auxiliary liquid jet polishing device for metal additive manufacturing parts. The cavitation kinetic energy of liquid jet beams can be enhanced, the stability of the jet beams is kept, and then the surface quality and the machining efficiency of metal additive manufacturing parts are improved. According to the technical scheme, the device comprises a liquid jet polishing unit, an ultrasonic field focusing unit and a permanent magnetic field collapse suppression unit. The liquid jet polishing unit comprises a polishing liquid foaming space and a nozzle, the polishing liquid foaming space is communicated with superior equipment for supplying polishing liquid, and the nozzle is fixed below the polishing liquid foaming space. The ultrasonic field focusing unit comprises an ultrasonic conduction piece, and a part of the structure of the ultrasonic conduction piece is arranged in the po