52 results about "Metal droplets" patented technology

The invention discloses a bimetallic composite material preparation method and system based on metal droplet size regulation and control, and belongs to the technical field of centrifugal casting. According to the method, aiming at a bimetal system with a liquid-liquid mixing and dissolving gap, an alloy melt is smelted according to a preset proportion, and then precise control over the size of second metal phase liquid drops is achieved in a casting ladle by regulating and controlling the standing time in combination with a high-temperature and high-speed camera shooting system. Then relevant casting parameters are input into an autonomously derived liquid drop movement speed and trajectory prediction model, the liquid drop position is predicted, and finally the centrifugal rotating speed or the heating power is adjusted through feedback control according to the deviation between a prediction result and a preset trajectory, so that directional preparation of different structures of the bimetal composite material is achieved. The corresponding system comprises a monitoring module, a calculation module and an execution module which cooperatively complete parameter monitoring, calculation analysis and precise regulation and control in the material preparation process. The casting inclusion defect can be reduced, the product quality instability is reduced, and directional preparation of different structures of the bimetal composite material is achieved.

An apparatus for producing drops of liquid metal for additive manufacturing comprises a reservoir for supplying liquid metal and a pressure chamber in fluid communication with the reservoir. The pressure chamber has a channel therein where compressive forces are applied on the liquid metal therein. Upper and lower electrodes apply a current through the liquid metal in the pressure chamber. This current creates an electric field that produces radially inward directed Lorentz forces on the liquid metal. This compressive force provides pressure in the longitudinal direction for ejecting the liquid metal through the orifice to form liquid metal droplets.

The invention relates to the technical field of additive manufacturing, in particular to a molten metal drop spraying additive manufacturing system and method.The core structure of the system is a multi-pole electric arc melting-molten metal drop spraying integrated composite sprayer, and continuous feeding metal wires are efficiently smelted through double-bypass MIG electric arcs; the pulse heating power generated by the central plasma arc in a high-frequency state is adjusted, and the molten metal is driven to be sprayed out from a nozzle below the spray head in cooperation with air pressure, so that jet deposition with stable and adjustable molten drop size and frequency is realized. According to the composite nozzle structure, a first-stage structure for achieving efficient metal smelting is composed of a center plasma arc-double-bypass MIG composite multi-pole arc and a feeding welding wire, and a second-stage structure for achieving metal rectification-injection is composed of a small funnel-shaped buffer cavity and a tail end nozzle. The system has the characteristics of small size, easiness in carrying, high integration, wide application range and the like.

The present disclosure relates to a liquid metal jetting ejection nozzle having a nozzle main body and a wetting plate. The nozzle main body has an enlarged opening at a distal end through which a molten metal feedstock material flows during a liquid metal jetting operation, and is formed from a first material having a first wetting characteristic. The wetting plate has an aperture and is secured to the enlarged opening of the nozzle main body. The wetting plate has a second wetting characteristic of a magnitude less than the first wetting characteristic to at least inhibit wetting. This two piece nozzle construction enables optimum materials and construction / fabrication techniques to be used for both components, thus improving performance, durability and reliability of the ejection nozzle.

The present disclosure relates to a system for additive manufacturing. The system includes a frame, a CNC bed configured with the frame. A metal dispensing mechanism configured to eject metal droplets on the CNC bed. The metal dispensing mechanism is configured to controllably move with respect to the CNC bed for manufacturing the object. The metal dispensing mechanism includes a first nozzle, functionally configured with the CNC bed, for controllably dispensing the metal droplets on the CNC bed, and the nozzle is fluidically configured with a reservoir having the metal. A piston configured with the reservoir, and the piston is configured to push the molten metal from the reservoir such the molten metal is released from the reservoir towards the first nozzle. The piston is made of thermally insulating material, and a transducer configured with the piston to facilitate mechanical jerking of the piston for facilitating the pushing of the molten metal from the reservoir.

Systems and methods for creating molten metal droplets are disclosed. The systems may be used for 3D printing. The system relies on a change in momentum of the droplet relative to the tip of the metal microwire to cause the droplet to separate from the tip of the metal microwire. The change in momentum can be created using a force generator. In some embodiments, the system can adjust electrical parameters to form metal droplets with desired parameters.

The invention discloses a drop tube metal microdroplet deposition device and method for simulating a space environment. The device comprises a drop tube; a metal microdroplet nozzle is mounted at the top of the drop tube, a composite substrate is arranged below the metal microdroplet nozzle, a replaceable tested substrate is arranged in the middle of the composite substrate, and two ends of the composite substrate are matched with a release mechanism arranged on the inner wall of the drop tube; a transparent window is arranged on the side wall of the drop tube below the composite substrate, and an image collecting device is arranged on one side of the window; when the metal liquid drops of the experimental metal material start to fall off from the metal micro-drop spray head, controlling the release mechanism to release the composite substrate after a preset time; the metal liquid drops and the composite substrate are pursued and contacted in a weightlessness falling state, are captured and recorded by the image acquisition device through the window, and then are transmitted to the upper computer for subsequent analysis. The technical problem that in the prior art, the contact solidification process of the metal liquid drops and the substrate in the space microgravity environment cannot be truly simulated on the ground is solved.

The application relates to the technical field of extreme ultraviolet light generation, in particular to a magnetic levitation potential well coagulation device and a metal droplet coagulation method. The magnetic levitation potential well coagulation device comprises a magnetic potential well generator, a detection sensor and a controller. The magnetic potential well generator is arranged at the downstream of a metal droplet generator, and the magnetic potential well generator is configured to generate a magnetic potential well to generate a force on the metal droplets output by the metal droplet generator, and the force can reduce the movement speed of the metal droplets. The detection sensor is arranged at the downstream of the magnetic potential well generator, and the detection sensor can detect the size of the metal droplets. The detection sensor and the magnetic potential well generator are in communication connection with the controller, and the controller is configured to control the start, the stop and the adjustment of the strength of the magnetic potential well generator according to the detection result of the detection sensor. The metal droplet coagulation method can make the size of the metal droplets meet the generation requirements of extreme ultraviolet light when applied to the above-mentioned magnetic levitation potential well coagulation device.

The present disclosure relates to a liquid metal jetting ejection nozzle having a nozzle main body and a wetting plate. The nozzle main body has an enlarged opening at a distal end through which a molten metal feedstock material flows during a liquid metal jetting operation, and is formed from a first material having a first wetting characteristic. The wetting plate has an aperture and is secured to the enlarged opening of the nozzle main body. The wetting plate has a second wetting characteristic of a magnitude less than the first wetting characteristic to at least inhibit wetting. This two piece nozzle construction enables optimum materials and construction / fabrication techniques to be used for both components, thus improving performance, durability and reliability of the ejection nozzle.

The application discloses a gas discharge tube, and belongs to the technical field of discharge tubes. The gas discharge tube comprises an electrode, a ceramic tube wall and electronic powder. The electrode comprises an outer electrode and an inner electrode. The inner electrode is fixedly connected with the inner side wall of the outer electrode. The outer electrode is fixedly and sealingly connected with the ceramic tube. The inner electrode is in a groove shape. The groove opening of the inner electrode is arranged away from the outer electrode. The electronic powder is adhered to the bottom wall of the groove of the inner electrode. The inner electrode with the groove and the electrode powder adhered to the grid can effectively reduce the spatter probability of the electrode powder. Meanwhile, the inner electrode with high temperature resistance can avoid the formation of metal droplets. The groove of the inner electrode can avoid the accumulation of the electrode liquid and the electrode powder to form a conductive belt, and can avoid the discharge tube from being in a short circuit state for a long time. The discharge tube of the application will not fail in short circuit, and the service life of the discharge tube is effectively prolonged.

The utility model relates to a combined heating device of an electrode induction melting gas atomization powder making furnace, and belongs to the technical field of metal powder preparation. Comprising a material hanging device (1), a high-frequency induction coil (5), a medium-frequency induction coil (4) and a fixing rod (2), and the medium-frequency induction coil (4) is arranged over the high-frequency induction coil (5); the fixing rod (2) is arranged on the material hanging device (1), the material hanging device (1) can enable the fixing rod (2) to move up and down, the fixing rod (2) is located over the medium-frequency induction coil (4), and the lower end of the fixing rod (2) is connected with the metal rod (3). According to the device, the degree of superheat of falling metal molten drops is increased through twice heating of the medium-frequency induction coil (4) and the high-frequency induction coil (5), and the yield of fine powder is increased. The fixing rod (2) ensures that the single metal rod (3) is melted as much as possible, and the powder collecting rate of the single metal rod (3) is increased. The problems that the heating power of existing equipment is limited, the superheat degree of metal molten drops is difficult to increase, and the equipment transformation cost is high are solved.

This invention provides a preventive maintenance operation method for a lithography system, comprising the following steps: spraying metal droplets from the reservoir of a droplet generator toward an excitation area in front of a collector; emitting an excitation laser toward the excitation area, causing the metal droplets to be heated by the excitation laser to generate extreme ultraviolet (EUV) radiation; stopping the emission of the excitation laser; depressurizing the reservoir of the droplet generator; cooling the droplet generator to a temperature not lower than approximately 150°C; and backfilling the reservoir of the droplet generator with solid metal material at a temperature not lower than approximately 150°C.

The invention provides fire simulation equipment for power cable short circuit. The cable simulation system comprises an experimental cable and a pipe gallery simulation piece, the pipe gallery simulation piece is used for simulating a limited long and narrow environment where a real short-circuit cable is located, the supporting system is arranged in the pipe gallery simulation piece, and the experimental cable is horizontally placed on the supporting system; the heating system is electrically connected with the experimental cable and is used for introducing overload current into the experimental cable, the ignition system can generate molten metal drops, the ignition system is provided with a liquid outlet used for discharging the molten metal drops, and the liquid outlet of the ignition system is located above the experimental cable and enables the molten metal drops to drop on the experimental cable. Therefore, the short-circuit current heat effect and metal droplet ignition simulation reproduction of the experimental cable can be realized. According to the technical scheme, the problem that in the prior art, the accuracy of the simulation effect of fire simulation equipment for power cable short circuit is poor is solved.

This invention belongs to the field of laser cladding technology, and particularly relates to an apparatus and method for ultrasonic atomization-assisted ultra-high-speed wire feeding cladding. The apparatus includes a laser head follower plate, on which a laser head, an ultrasonic device, and a wire feeding device are connected. The follower plate is connected to a moving mechanism, and a machining axis rotation mechanism with a shaft to be processed is provided on the side. The laser head, ultrasonic device, and wire feeding device can move synchronously. The output end of the wire feeding device clamps the wire relative to the vibration end of the ultrasonic device. The ultrasonic device causes the wire to vibrate at high frequency, and the wire feeding device delivers the end of the wire to directly below the laser head's emitting end. The ultrasonic device includes components such as an amplitude transformer and a transducer, and the wire feeding device is equipped with a straightener, auxiliary wire guide wheel, and other structures. The clamping part enables the fixing and position adjustment of each component. This invention also discloses a method of using the apparatus, which refines the metal droplets through ultrasonic atomization, reduces the thickness of the cladding layer, ensures stable wire feeding, adapts to ultra-high-speed cladding processes, avoids defects in powder feeding cladding, reduces cladding costs, and improves cladding efficiency.

The utility model provides a heat dissipation magnet device for metal liquid drop spraying, and relates to the technical field of heat dissipation devices. Comprising a nozzle body, a magnet, a heat dissipation body and a heat dissipation fan, the magnet is arranged between the nozzle body and the heat dissipation body, the heat dissipation fan is arranged on the side, away from the magnet, of the heat dissipation body, and the heat dissipation fan is suitable for conducting heat dissipation on the heat dissipation body in an air suction mode. According to the scheme, the heat dissipation effect can be improved, and the influence on metal liquid drop spraying is reduced.

The invention relates to the technical field of nickel-based material manufacturing, in particular to a nickel-based material manufacturing process which comprises the following steps: performing hot melting on a metal raw material of a nickel-based material to obtain a metal melt; according to a comparison result of the stream diameter fluctuation quantity and a preset fluctuation quantity, the injection pressure of the atomized gas is determined; predicting an expected cooling rate after atomization according to the injection pressure; the temperature and the initial tangential spraying direction of cooling air flow surrounding the atomization cone are adjusted according to the expected cooling rate; carrying out atomization crushing on the metal melt according to the injection pressure to form metal liquid drops; condensing the metal liquid drops according to the temperature of the cooling air flow and the initial tangential spraying direction of the cooling air flow so as to obtain nickel-based alloy powder; the satellite powder proportion in the nickel-based alloy powder is obtained, and the preset fluctuation quantity is adjusted according to the satellite powder proportion; and the nickel-based alloy powder is subjected to vacuum curing forming to obtain a nickel-based material biscuit. According to the method, the preparation precision of the nickel-based alloy powder is improved.

This invention provides an environmentally friendly smelting system for waste circuit boards, which maintains high production capacity while meeting environmental protection requirements for production and processing. It utilizes an environmentally friendly smelting furnace to process waste circuit boards. Waste circuit boards, along with auxiliary materials, are continuously fed into the furnace cavity from the top inlet. Combustion air is blown in from the bottom air inlet, and the fuel undergoes high-temperature combustion near the air inlet, forming a high-temperature smelting zone. In the charge column zone, the charge undergoes preheating, pyrolysis, sintering, and melting reactions sequentially from top to bottom. After being reduced and melted, the metal in the smelting zone undergoes vertical movement from top to bottom, during which metal droplets aggregate and grow, separating from the slag, thus completing the separation and recovery of the metal.

The application relates to the technical field of metallized film capacitor manufacturing, and provides a spraying gold quality detection method and system. The method comprises the following steps: fixing a dry white printing paper to a placing position consistent with a metallized film capacitor core through a clamp, starting a spraying gold device, controlling a spraying gun to spray towards the printing paper according to preset production process parameters, simulating a process in which an end surface of the capacitor core bears a spraying gold thermal impact, and enabling metal droplets to adhere to the surface of the printing paper; moving the printing paper after the spraying operation away from a spraying gun operation area, and obtaining a color change state of the printing paper after being heated; obtaining a color matching temperature after calibration and a corresponding standard of a risk level, judging a current spraying gold temperature interval and a hidden danger of thermal damage of the core according to the color matching temperature, the corresponding standard of the risk level and the color change state of the printing paper, and adjusting operation process parameters of the spraying gold device according to the hidden danger of thermal damage. The method can comprehensively reflect the overall thermal impact effect of a spraying gold flow.

The application provides a kind of based on pulse detonation wave powder preparation equipment and powder preparation method, belongs to metal powder preparation field.Powder preparation equipment includes: detonation reaction chamber, material melting feeding module, pulse detonation generation module and powder collection chamber;Material melting feeding module is processed into the molten metal stream of metal bar material and enters the detonation reaction chamber, under the action of pulse detonation wave of pulse detonation generation module, cavitation is broken into small metal droplets, and under the action of high-speed inert gas flow, it enters the powder collection chamber through the outlet of detonation reaction chamber, and metal powder is obtained.The application applies pulse detonation technology to metal powder preparation, compared with traditional metal powder preparation process, pulse detonation wave powder preparation can significantly improve production efficiency, and ensure the uniformity of metal powder morphology and granularity, improve the machinability of metal powder.The equipment and method of the application are widely applicable to various common metals and alloy materials, and have good popularization and application prospect.

The application discloses a kind of for space electron beam welding test device, comprising: equipment controller, inside the box is placed, with moving mechanism, infrared thermal imaging detector and electron beam gun connection;Mobile control instruction is sent to moving mechanism, and the detection of structural temperature field distribution performance;Electron beam gun, the electron beam generated, for the welding, cutting or additive forming on test workpiece after heating and melting of metal wire;Excess protection device is placed below electron beam gun, to prevent metal droplet on test workpiece from flying out.Infrared thermal imaging detector, the cutting, welding and additive process of electron beam gun are photographed;Temperature is measured;Moving mechanism moves according to mobile control instruction;Radiation plate radiates heat generated to the outside of box;Test workpiece is placed on the upper surface of excess protection device, excess protection device is connected with moving mechanism, moves with moving mechanism, drives test workpiece to move, realizes the processing of test workpiece.

The application discloses a metal powder production line and a production process, and relates to the technical field of metal powder manufacturing. The metal powder production line comprises a powder manufacturing device; the powder manufacturing device comprises an atomization bin, and an injection channel and a gas injection channel are arranged at the top of the inner cavity of the atomization bin; inert gas sprayed through the gas injection channel can impact the metal melt discharged through the injection channel to form a mixed jet; an expansion assembly is arranged outside the junction position of the liquid film part and the liquid drop part in a circumferential manner. The expansion assembly can rotate and increase the taper of the liquid drop part, so that the number (i.e. the density is reduced) of metal droplets and / or metal powder contained in the liquid drop part per unit volume is reduced, the probability of mutual impact of the metal droplets / metal powder is reduced, the probability and the number of satellite powder formation are reduced, and the rate of defective products is obviously reduced.

The invention provides a core-shell structure powder preparation device. The core-shell structure powder preparation device comprises a reaction container, and a wire feeding mechanism, a plasma spraying device and a precursor gas supply device which are arranged at the top of the reaction container. The wire feeding mechanism is used for continuously conveying metal wires into the reaction container, the plasma spraying device is used for supplying plasma jet into the reaction container, the path of the plasma jet passes through the wire feeding path of the metal wires, and the metal wires are fused at high temperature under the action of high-temperature plasma; and the metal particles are crushed into metal liquid drops or metal powder by high-speed plasma jet. At least one of the reaction container, the wire feeding mechanism and the plasma spraying device is provided with a gas supply channel, and the precursor gas supply device can be introduced into the reaction container through any one of the gas supply channels. The metal liquid drops or the metal powder is in contact with the precursor gas, the precursor gas is cracked and uniformly deposited on the surface of the metal liquid drops or the metal powder, and finally a core-shell structure with the inner layer being a metal core and the outer layer being a deposition layer is formed.

The invention discloses an ultrasonic atomization-chemical vapor deposition integrated preparation method. The method comprises the following steps that metal raw materials are subjected to ultrasonic atomization to form metal atomized liquid drops; transmitting the atomized metal liquid drops to a chemical vapor deposition reaction area, and depositing and growing a shell layer material on the surfaces of the metal liquid drops to generate coated metal liquid drops with a core-shell structure; and condensing the coated metal liquid drops to form the'metal-deposition layer 'core-shell structure particles. The ultrasonic atomizer is used for conducting ultrasonic atomization on the liquid metal raw materials so that the liquid metal raw materials can be crushed into small liquid drops to be dispersed and conveyed in a fluidized mode, the device can be suitable for high-melting-point metal and can also be suitable for low-melting-point metal, the application range is wide, meanwhile, impurities do not need to be additionally introduced in the process, the fluidity of airflow is guaranteed, and the production efficiency is improved. The method is not limited to raw materials which can only adopt a powder form, and is not limited to the original particle size distribution of the powder raw materials.

The application relates to a method for reducing the TFe content of converter final slag, which comprises the following steps: periodically fluctuating the surface of the slag in the converter during tapping, determining the foaming slag degree of the slag in the periodic surface fluctuation through image recognition technology and threshold segmentation, determining the TFe content of the slag by measuring the slag surface liquid level and correcting the measured value of the slag surface liquid level, adding new composite carbon-based deoxidizers to the slag surface for stirring according to the TFe content of the slag, and reducing the final slag TFe content of the slag. The periodic fluctuation of the slag layer is excited by tilting the furnace body, dynamic image recognition and ranging data are combined to determine the TFe content of the slag in real time, specific composite deoxidizers are added according to the TFe content of the slag, the nitrogen gas stirring intensity is adjusted, the reduction reaction and metal drop aggregation are promoted, and the final slag iron oxide content is significantly reduced, the cleanliness of the molten steel is improved, and the production efficiency is improved.

The invention discloses a preparation method of a micro-nano particle reinforced alloy coating, which comprises the following steps: (1) carrying out ball milling dispersion on metal matrix powder, and loading into a thermal spraying gun; (2) filling the micro-nano powder precursor salt solution into a spraying device; (3) fixing a thermal spraying gun and a spraying device in the vacuum chamber, wherein the spraying device is positioned obliquely above the thermal spraying gun; the horizontal distance between the two is 20-50mm; the height of an outlet of the spraying device exceeds that of an outlet of the spray gun by (4) starting a vacuum system to enable the vacuum degree of the chamber to be less than or equal to 0.5 bar; and (5) the thermal spraying gun and the spraying device are synchronously started, so that the metal molten drops and the micro-nano particles are deposited on the base body in an in-situ composite mode. The method has the advantages that the cost of spray thermal decomposition in the vacuum environment and the cost of thermal spraying in the vacuum environment are both high, the vacuum cavity serves as the working environment of spray thermal decomposition and the working environment of thermal spraying at the same time, the cost can be greatly reduced, and the quality of powder particles and the quality of a coating are improved.

To provide a tin ball having a diameter larger than about 1 mm and excellent sphericity.SOLUTION: A method for manufacturing a tin ball, comprising: dropping molten metal tin into a liquid cooling medium; and forming a solid tin ball by cooling a droplet of the molten metal tin while the droplet of the molten metal tin falls in the liquid cooling medium, wherein the tin ball has a radius ranging from 1mm to 5mm.SELECTED DRAWING: Figure 1

The application provides a multi-morphology liquid metal droplet fiber and a preparation method thereof. The multi-morphology liquid metal droplet fiber is prepared by using microfluidic spinning technology, and comprises a fiber substrate and metal droplets which are distributed on the fiber substrate at intervals. The metal droplets have multiple morphologies, and the fiber has more flexible and controllable surface topography, and can be applied to the regulation of the fluid interface on the fiber.

Systems and methods for controlling droplet properties in an additive manufacturing process are disclosed. The systems may be used for 3D printing. The method includes setting at least one parameter for a plurality of plasma arcs, applying the plasma arcs in succession to the tip of a feedstock to form a metal droplet, and ejecting the metal droplet from the feedstock towards a build platform, the ejected metal droplet having at least one desired property based on the at least one set parameter.

The invention discloses an additive manufacturing experimental device based on an alternating magnetic field and variable metal droplet sizes. The device is sequentially provided with a laser generator, a protective gas mechanism, a powder / wire feeding mechanism, a coaxial nozzle, molten metal droplets, a workpiece (a molten pool) and a platform for bearing the molten pool which are coaxially arranged. An alternating magnetic field coil and an alternating magnetic field displacement table moving up and down are arranged at the position flush with the surface of the molten pool, and the alternating magnetic field can generate eddy current in the molten pool so as to increase viscous dissipation of flowing in the molten pool, reduce oscillation kinetic energy, avoid formation of unnatural recesses on the surface of the molten pool and reduce splashing; according to the powder / wire feeding mechanism, powder / wires with different diameters are adopted for alternately feeding powder, the mirror symmetry of the same liquid drop size and speed is broken, and convection in a molten pool is enhanced. The magnetic field provides conditions for stable printing under strong airflow, the variable-size liquid drops optimize the microstructure on the basis of stability, and the DED technology is jointly promoted to develop to better performance.

The application discloses a kind of based on magnetic field deflection arc tail flame's droplet temperature measurement device in wire arc additive manufacturing, it is related to electric arc additive manufacturing technical field.Wire feeding mechanism feeds welding wire, forms droplet under the action of arc;Electromagnet applies additional magnetic field, to produce arc tail flame deflection angle makes arc and metal droplet falling into calorimeter separate;Metal droplet drops into calorimeter, calorimeter monitors the temperature change of copper cylinder, calculates the temperature of droplet reaching calorimeter surface, utilizes infrared thermal imager to detect the temperature loss of droplet, and this part of temperature loss is compensated to the droplet temperature measured by solid copper calorimeter, obtains the relatively accurate temperature value of droplet itself.The application separates arc tail flame and droplet trajectory, to avoid arc tail flame heating solid calorimeter and interfering with the measurement of droplet temperature, to improve the precision of droplet temperature measurement, which has important theoretical significance and value to the temperature measurement and forming mechanism research of additive manufacturing.