A preparation process of a novel drill shank for an IMPACT gun drill, including: manufacturing a mold and a forming block, wherein a forming blind hole is formed in a middle of the mold, the forming block is inserted into the forming blind hole, a wire pipe is disposed in the mold, a feed port is formed in the forming block, a heating cavity is formed in a forming block lateral face and a forming post; manufacturing the forming block with a 2Cr25Ni20 material; injecting tin bronze powder and iron powder into the forming blind hole, starting vibration pressing by the forming block; inputting direct and pulse current to communicate with the metal powder and heat the metal powder at a same time; forming a drill shank blank after 2-3 min, taking out the drill shank blank; removing an adsorbing agent from the drill shank blank by an extraction method.

Provided is a laminate molding method for additionally manufacturing a molded object on a table by use of metal powder. The laminate molding method includes: a metal powder layer forming step of forming a metal powder layer by supplying metal powder onto a table; a melting step of melting the metal powder layer by applying, to the metal powder layer, electromagnetic energy emitted from an electromagnetic energy source; a rotating step of rotating the electromagnetic energy source and the table relative to each other; and a table vertically moving step of vertically moving the table relative to the electromagnetic energy source. Gas is emitted from a gas emission port toward an outer side of the table, the gas emission portion being provided in generally a center of the table.

Methods and systems for high-speed production of nanoparticles with very high product yields are described. Systems utilize concentric micro-scale capillaries arranged to define nanoparticle formation regions that lie along predetermined length(s) of the capillaries. Flow through the formation regions can be laminar during a formation protocol. The system can include on-line analytical tools for real time characterization of products or intermediates. Systems include an additive manufacturing-type deposition at the terminus of the formation section. The deposition area includes a print head and a print bed and provides for random or patterned deposition of nanoparticles. The print head and/or the print bed can be capable of motion in one or more degrees of freedom relative to one another.

Methods and systems for high-speed production of nanoparticles with very high product yields are described. Systems utilize concentric micro-scale capillaries arranged to define nanoparticle formation regions that lie along predetermined length(s) of the capillaries. Flow through the formation regions can be laminar during a formation protocol. The system can include on-line analytical tools for real time characterization of products or intermediates. Systems include an additive manufacturing-type deposition at the terminus of the formation section. The deposition area includes a print head and a print bed and provides for random or patterned deposition of nanoparticles. The print head and/or the print bed can be capable of motion in one or more degrees of freedom relative to one another.

A material delivery device for an additive manufacturing device (AMD) adapted for manufacturing objects through deposition of additive material over a build surface. The material delivery device comprises an inner funnel having a large aperture and a small aperture whereby the additive material is guided from the large aperture to the small aperture; wherein the inner funnel is electrically conductive and, upon applying an electrical current to the inner funnel, heat is generated thereby heating the additive material travelling in the inner funnel.

A material delivery device for an additive manufacturing device (AMD) adapted for manufacturing objects through deposition of additive material over a build surface. The material delivery device comprises an inner funnel having a large aperture and a small aperture whereby the additive material is guided from the large aperture to the small aperture; wherein the inner funnel is electrically conductive and, upon applying an electrical current to the inner funnel, heat is generated thereby heating the additive material travelling in the inner funnel.

A system for recoating a powder bed includes a build platform holding a powder bed and an electrode assembly including an electrode and an insulating shield. A voltage supply produces a high voltage alternating current and communicates with the powder bed and the electrode. The electrode assembly is positionable over the powder bed, such that when the electrode assembly is over the powder bed, the shield is between the electrode and the powder bed's top surface. The voltage supply produces a high voltage alternating current that creates an alternating electric field between the electrode and the powder bed that causes the powder of the powder bed top surface to oscillate in a region between the shield and the bed and then reposition themselves on the bed such that the top layer of the powder bed is smoother than it was prior to when the powder particles began oscillating.

A system for recoating a powder bed includes a build platform holding a powder bed and an electrode assembly including an electrode and an insulating shield. A voltage supply produces a high voltage alternating current and communicates with the powder bed and the electrode. The electrode assembly is positionable over the powder bed, such that when the electrode assembly is over the powder bed, the shield is between the electrode and the powder bed's top surface. The voltage supply produces a high voltage alternating current that creates an alternating electric field between the electrode and the powder bed that causes the powder of the powder bed top surface to oscillate in a region between the shield and the bed and then reposition themselves on the bed such that the top layer of the powder bed is smoother than it was prior to when the powder particles began oscillating.

Devices, systems, and methods are directed to applying magnetohydrodynamic forces to liquid metal to eject liquid metal along a controlled pattern, such as a controlled three-dimensional pattern as part of additive manufacturing of an object. Electric current delivered to a meniscus of the liquid metal in a quiescent state can be directed to exert a pullback force on the liquid metal. The pullback force can be sufficient to draw the liquid metal, in the quiescent state, in a direction toward the nozzle to reduce the likelihood of unintended wetting of surfaces of the nozzle between uses of the nozzle.

Devices, systems, and methods are directed to applying magnetohydrodynamic forces to liquid metal to eject liquid metal along a controlled pattern, such as a controlled three-dimensional pattern as part of additive manufacturing of an object. Electric current delivered to a meniscus of the liquid metal in a quiescent state can be directed to exert a pullback force on the liquid metal. The pullback force can be sufficient to draw the liquid metal, in the quiescent state, in a direction toward the nozzle to reduce the likelihood of unintended wetting of surfaces of the nozzle between uses of the nozzle.