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Magnetohydrodynamic deposition of metal in manufacturing

  • US 10,201,854 B2
  • Filed: 03/06/2017
  • Issued: 02/12/2019
  • Est. Priority Date: 03/03/2016
  • Status: Active Grant
First Claim
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1. An additive manufacturing system, the additive manufacturing system comprising:

  • a nozzle including a housing, one or more magnets, and electrodes, the nozzle defining a fluid chamber having an inlet region and a discharge region, the one or more magnets directing a magnetic field through the housing, and the electrodes defining at least a portion of a firing chamber in the fluid chamber between the inlet region and the discharge region, wherein electric current is conductible from the electrodes such that the electric current intersects the magnetic field in the firing chamber at a point substantially adjacent to a discharge orifice of the discharge region;

    a robotic system mechanically coupled to the nozzle;

    an electrical power source in electrical communication with the electrodes; and

    a controller in electrical communication with the robotic system and the electrical power source, the controller configured tomove the robotic system to position the discharge region of the nozzle in a controlled three-dimensional pattern, andbased on the position of the discharge region along the controlled three-dimensional pattern, to actuate the electrical power source to deliver pulsed current to the electrodes to eject liquid metal from the discharge region to form a three-dimensional object, wherein a frequency of the pulsed current is less than about 5 kHz at a maximum speed of movement of the discharge region, and the frequency of the pulsed current is based on speed of movement of the nozzle.

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