3 results about "Coaxial nozzle" patented technology

The present application relates to the technical field of gas atomization device, and discloses a tight coupling nozzle structure and a gas atomization device, the tight coupling nozzle structure comprises a gas atomization nozzle disc and a flow guide pipe, the gas atomization nozzle disc is composed of a coaxial nozzle disc upper cover and a nozzle disc base, the flow guide pipe is inserted into the center hole of the thickness of the nozzle disc upper cover and forms a tight coupling assembly structure with the gas atomization nozzle disc, the vertical spacing between the nozzle disc gas outlet and the outer wall of the flow guide pipe is equal to the bottom ring thickness of the nozzle disc upper cover, the bottom ring thickness of the nozzle disc upper cover is 1-2 mm, the inner core of the flow guide pipe is a cylindrical hole, the outside is an integrally formed cylindrical section and a contraction section, and the contraction angle of the flow guide pipe contraction section is 30-60 degrees, the present application optimizes the contraction angle of the flow guide pipe contraction section and the bottom ring thickness of the nozzle disc upper cover, reasonably controls the position of the atomization backflow area, obtains higher fine powder yield, and reduces the probability of nozzle blockage.

This invention discloses a laminar plasma in-situ atomization powder production device and method. The device includes a coaxially integrated laminar radio frequency plasma torch and a supersonic laminar gas atomizing nozzle. A metal wire is vertically fed into the core of the radio frequency plasma torch along its axial center. The end of the wire melts instantaneously without crucible constraint. The resulting melt is then sheared and broken by the supersonic laminar inert gas surrounding the outer ring of the plasma torch outlet, achieving in-situ powder production with simultaneous melting and atomization. This invention integrates plasma heating and melting with supersonic gas atomization within the same coaxial nozzle, eliminating the risk of crucible material contamination, avoiding component segregation problems during the smelting of refractory metals and refractory high-entropy alloys, significantly improving the yield of fine powder, and effectively suppressing the formation of satellite powder. It is suitable for the efficient and high-purity preparation of spherical powders of high-melting-point metals such as tungsten, molybdenum, tantalum, niobium, and rhenium, as well as their multi-component high-entropy alloys.

This invention provides a multi-material directional energy deposition additive manufacturing method and system. The method includes: a host computer slicing a 3D digital model with boundary representation and material property information to obtain the coordinate information of the model boundary surface and model voxels in 3D space, as well as the corresponding material property information; the host computer identifies the material property information, determines whether the required raw material is a single material or a combination of multiple materials, and selects the powder feeding mode of a multi-channel intelligent powder feeder; the identified material powder is added to the multi-channel intelligent powder feeder; the host computer converts the material property information and coordinate information into dynamic material commands that drive the multi-channel intelligent powder feeder and heat source to supply and melt different material powders, and multi-axis motion path information that drives the laser powder coaxial nozzle and positioner to coordinate the motion to complete the real-time dynamic deposition of materials with different properties in 3D space. This method breaks through the limitations of traditional formats and significantly improves material switching and component control capabilities.