Electronic equipment with silica gel key

The utility model discloses an electronic equipment with silica gel key, establish the silica gel key on key circuit board including casing, the key circuit board and the pressure of setting in the casing, the casing sets up in the cavity that encloses the bone encirclement at the protruding closed bone that encloses that is equipped with in position around key circuit board, key circuit board, the recess that the key circuit board's of silica gel key court one side was equipped with and enclosed the bone photo adaptation encloses the bone card and establishes in the recess, and encloses boneand recess interference fit. The utility model discloses technical scheme through the casing around key circuit board's the protruding closed bone that encloses of establishing in position, press to establish to correspond the position of enclosing the bone on the silica gel key on key circuit board and set up the recess, through enclosing between bone and the recess interference fit with sealed silica ...

Medicine type cover electroforming manufacturing process and equipment

Superfine electroform technique of supercutical fluid, and equipment

This invention discloses process and apparatus for micro electroforming by using supercritical fluid. The process comprises: (1) generating supercritical fluid electroforming solution in the reactor of a fine deposition unit; (2) controlling the power source by a control unit, selecting appropriate electric parameters, and depositing metal ions onto the photoresist patterns of the cathode of the fine deposition unit; (3) removing residual photoresist to obtain fine component. The apparatus comprises a CO2 steel bottle, a high-pressure pump, a DC power source, a control unit, a fine deposition unit, a magnetic stirrer, a thermostatic bath, a backpressure valve and a recovery device. The method and apparatus in this invention can deposit compact, smooth and clear fine component, and the waste supercritical fluid electroforming solution can be recovered and recycled.

Method for preparing titanium-doped tungsten disulfide solid lubricant

The invention discloses a method for preparing a titanium-doped tungsten disulfide solid lubricant, wherein the method includes the following steps: mixing an elementary-substance titanium powder, tungsten trioxide and thiourea, then grinding, and loading the ground powder into a porcelain boat; starting up a tube furnace, pushing the porcelain boat into a central hot zone position of the tube furnace, carrying out constant temperature treatment, naturally cooling to the room temperature, and thus obtaining a titanium-doped tungsten disulfide solid lubricant powder. The method has the advantages of low cost, simple and easily controlled production process, and high production output rate, and is suitable for large-scale industrial production.

Preparation method of flower-shaped molybdenum disulfide microspheres

The invention discloses a preparation method of flower-shaped molybdenum disulfide microspheres. The preparation method comprises the steps of dissolving ammonium molybdate tetrahydrate in deionized water to prepare a solution of 0.02-0.05 mol/L; adding thiourea to the solution, and stirring the mixture for 20-30 min by using a magnetic stirrer so that the solution is mixed uniformly, wherein the mol ratio of ammonium molybdate tetrahydrate to thiourea is (1 : 20) to (1 : 30); transferring the solution to a hydrothermal reaction kettle, performing hydrothermal reaction for 4-8 hours at 220-240 DEG, naturally cooling, centrifuging, washing by deionized water and ethyl alcohol, and drying again to obtain molybdenum disulfide microspheres. The preparation method of the flower-shaped molybdenum disulfide microspheres has the advantages that the cost is low, the process is simple and is easy to control, the appearances of the prepared microspheres are even, and the product output is high; the ...

Supercritical composite electroforming system recycling device and working method thereof

The invention provides a supercritical composite electroforming system recycling device, which comprises a control valve unit, a gas filter, a gas reservoir, an electroforming solution reservoir, a magnetic drive pump, an electroforming solution detecting and blending assembly, a composite particle recoverer, an high-pressure pump, a CO2 gas cylinder and a pressure gage; the gas filter comprises a gas-liquid separation chamber, a gas filtering chamber and a gas drying chamber; the gas filter is connected with a reaction still and the gas reservoir and is used for recycling gas; the magnetic drive pump is connected with the electroforming solution reservoir; the electroforming solution detecting and blending assembly comprises an ion detection trough, an ion meter and a composite electroforming solution blending trough, and is used for recycling and blending composite electroforming solution; the composite particle recoverer is used for recycling useful solid particles in the composite electroforming ...

Preparation method of flower-shaped tungsten disulfide nano particles

The invention discloses a preparation method of flower-shaped tungsten disulfide nano particles, which utilizes a high-temperature vulcanization synthesis method. The preparation method comprises the steps of mixing elemental powdered sulfur, thiourea and WO3 according to the mol ratio of (10 : 10 : 1) to (20 : 20 : 1), fully grinding, and pressing the grinded powder in a tablet machine under the pressure of 25-35 MPa to obtain wafers with the diameters of 25-30 mm and the thickness of 4-6 mm; putting the wafers to a crucible, and pushing the crucible to the center of a tube furnace; aerating argon to the tube furnace, quickly increasing the temperature of the tube furnace to 800-850 DEG C at 10-12 DEG C/min, and holding for 30-60 min; then, naturally cooling down the tube furnace to the room temperature to obtain the flower-shaped tungsten disulfide nano particles. The preparation method of the flower-shaped tungsten disulfide nano particles has the advantages that the process is simple ...

High-accuracy hydraulic synchronous lifting control system of wind installation vessel

The invention provides a high-accuracy hydraulic synchronous lifting control system of a wind installation vessel. The high-accuracy hydraulic synchronous lifting control system of the wind installation vessel comprises a hydraulic transmission module, a hydraulic control module and an electric control module. The hydraulic transmission module comprises a base, a spud leg and four hydraulic transmission assemblies, wherein the spud leg is fixed to the base, and a lug seat is arranged on the base. The hydraulic transmission assemblies comprise the left transmission assembly, the rear transmission assembly, the right transmission assembly and the front transmission assembly of the same structure. The hydraulic control module comprises a hydraulic oil tank, hydraulic pipelines, an air filter, a motor, a hydraulic pump, a check valve, an overflowing valve, four hydraulic transmission control assemblies and four hydraulic bolt control assemblies, wherein the hydraulic pump is connected with ...

Medicine type cover electroforming manufacturing process and equipment

With core mould of the gunpowder typed cup being rotated, the feed flow of the electroforming fluid carries out from bottom part of the core mould. The anode with shape similar to the shape of the core mould of the medicine-typed cover is made with insulation material. The anode combines with the blocky electroform material of the anode to constitute the anode cavity as the anode unit. The rolling depression or the friction and disturbance treatment is carried out for the core mould of the cathode in rotating electroform by using the rolling depression method or the insulation friction method. The device includes the stock solution tank, the magnetic drive pump, the filter, the ball valve etc. The equipment also includes the rotating cathode, the rolling depression set or friction set, the imitating anode etc constituted the device of the electroform procedure.

Superfine electroform technique of supercutical fluid, and equipment

This invention discloses process and apparatus for micro electroforming by using supercritical fluid. The process comprises: (1) generating supercritical fluid electroforming solution in the reactor of a fine deposition unit; (2) controlling the power source by a control unit, selecting appropriate electric parameters, and depositing metal ions onto the photoresist patterns of the cathode of the fine deposition unit; (3) removing residual photoresist to obtain fine component. The apparatus comprises a CO2 steel bottle, a high-pressure pump, a DC power source, a control unit, a fine depositionunit, a magnetic stirrer, a thermostatic bath, a backpressure valve and a recovery device. The method and apparatus in this invention can deposit compact, smooth and clear fine component, and the waste supercritical fluid electroforming solution can be recovered and recycled.

Method for preparing nano composite material by supercritical fluid electroforming

The invention discloses a method for preparing nano composite material by supercritical fluid electroforming, which comprises the following steps of: (1) adding metal salt solution, nano granules and composite additive into a reactor of an electroforming device, stirring uniformly, introducing carbon dioxide gas, and stirring at the temperature of between 35 and 50 DEG C under the pressure of 8 to 20MPa to generate supercritical fluid electroforming solution containing the nano granules; (2) setting pulse interval at 1 to 5 microseconds, setting the pulse width at 10 to 30 microseconds, setting the current density at 1 to 3A/dm<2>, switching on a direct-current power supply, and making the metal ions and the nano granules in the metal salt solution deposited on a cathode template togetherto obtain a nano composite electroforming layer; and (3) after the deposition is completed, obtaining the nano composite material by corresponding treatment. The method can electroform the nano composite ...

Method for processing drill by adopting supercritical composite plating based on movable anode

The invention provides a method for processing a drill by adopting supercritical composite plating based on a movable anode. The method for processing the drill by adopting the supercritical composite plating based on the movable anode comprises the following main steps: preprocessing a base material of the drill, so that the drill has capability of electrically depositing a nano composite coating; adding prepared electroplating solution into a reactor, sealing, introducing CO2 gas, and adding a surface active agent, so that an electroplating system under the supercritical condition is formed; setting parameters, such as current, temperature and mechanical stirring speed which meet electrodeposition requirements; adjusting relative position between an anode and a cathode, setting the travelling speed and stroke of the anode, and switching on, so that the nano composite coating can be well deposited on the surface of a processed drill taken as a cathode main body; taking down the drill after ...

Experimental facility simulating gas film continuous casting crystallizer

The invention discloses an experimental facility simulating a gas film continuous casting crystallizer. The experimental facility comprises an underframe, a plastic film bag, a transparent simulating crystallizer cylinder and a stimulating crystallizer cover board, wherein the top surface of the simulating crystallizer cylinder is provided with an annular air duct leading to the inner cavity of the simulating crystallizer cylinder and evenly distributed radial air ducts; the wall of the simulating crystallizer cylinder is provided with an air inlet leading to the annular air duct and a plurality of pressure measuring channels which are at different heights and lead to the inner cavity of the simulating crystallizer cylinder; the air inlet is connected with a gas flow control valve; each pressure measuring channel is connected with a pressure measuring apparatus; the plastic film bag stretches into the simulating crystallizer cylinder through the center hole of the stimulating crystallizer ...

Device and method for machining high-aspect-ratio microstructure through jet water-assisted laser and electric spark

The invention relates to a device for combined machining of a high-aspect-ratio microstructure through jet water-assisted laser and electric spark. The device comprises a laser machining system, a water jet auxiliary system, an electric spark machining system and a control system. The laser machining system conducts laser machining on a workpiece, the water jet auxiliary system conducts scouring and cooling on the surface of the machined workpiece, the water jet auxiliary system adjusts the distance and angle between the water jet auxiliary system and the machined workpiece through a six-axis mechanical arm, the electric spark machining system conducts electric spark machining on the machined workpiece, and the control system controls all the systems and provides a power source. The invention further provides a processing method. According to the invention, the laser is used for rapidly removing the workpiece from the processing object, and the water jet is used for washing and cooling ...

Supercritical intelligent heating temperature gradient composite electrodeposition device

The invention discloses a supercritical intelligent heating temperature gradient composite electro-deposition device which is simple in structure and convenient to operate, can intelligently adjust the temperature rise time through an intelligent heating plate according to different coating thicknesses, material properties and electro-deposition processes in a supercritical state, is suitable for surface coatings with different heating requirements, and is high in practicability. In addition, after the intelligent heating resistor conducts multiple times of timing heating on the cathode in the electroplating period, the temperature of the clamp cathode is higher than the temperature of a plating solution, and a staged temperature gradient is formed between the cathode and the inner cavity of the kettle, so that the cathode electric ion activity is improved, the electro-deposition rate is increased, pinholes, accumulated burls and other defects are reduced, the surface of a plating layer ...

Manufacturing method of nickel-based diamond slice

The invention discloses a manufacturing method of a nickel-based diamond slice, which comprises the following steps of: (1) adding nanodiamond, a nickel salt water solution, additives, boric acid and a proper amount of water into a reactor, putting a negative plate and a positive plate into the reactor, and respectively fixing the negative plate and the positive plate on the reactor; (2) introducing carbon dioxide gas into the closed reactor, and stirring under the conditions that the temperature is 35-70 DEG C and the pressure is 7-12MPa to obtain a supercritical fluid composite plating solution containing the nanodiamond; (3) setting plating parameters, and switching on a plating power source to enable the nanodiamond and nickel ions to be electrically deposited on the negative plate together to obtain a composite plating; and (4) putting the negative plate with the composite plating into a box-type burning furnace for burning off plastics, and slicing the composite plating to obtain ...

Brush electroplating device and method for repairing part hole

The invention provides a brush electroplating device and method for repairing a part hole. The device comprises a support, two sets of plating pen clamping assembles, two plating pens, a driving assembly, a brush plating power source and a check ring. The support comprises a base, supporting legs, a lifting platform and a liquid draining nozzle. Each plating pen clamping assembly comprises a clamping disk, a balance clamping piece and an installing and connecting column. Each plating pen comprises a clamping part, an insulating part, a conductive shaft shoulder, a working part and a plating liquid input nozzle. The driving assembly comprises a driving motor, a rotating shaft, a rotary table and a workpiece fixing piece. The plating pens are fixedly installed through the plating pen clamping assemblies. The machining method includes the steps of electric purification machining, weak activation machining, strong activation machining, brush electroplating and the likes. The brush electroplating ...

Preparation method of aluminum alloy semi solid-state slurry

The present invention discloses process of preparing semi-solid aluminum alloy slurry. The process includes the following steps: 1. preparing aluminum alloy powder through high pressure inert gas atomizing or jet molding; 2. heating partial aluminum alloy into melt and maintaining in semi-solidifying temperature region; and 3. mixing the aluminum alloy powder and the aluminum alloy melt through stirring to obtain semi-solid aluminum alloy slurry. The process of the present invention can produce semi-solid aluminum alloy slurry with fine structure in short period, simple apparatus and low cost.

Method for designing anti-bending structure of octagonal safety pin pile leg

The invention provides a method for designing an anti-bending structure of an octagonal safety pin pile leg. The method comprises the steps of defining pile leg model parameters, establishing a pile leg solid model, performing processing prior to analysis on the pile leg solid model, applying load and fixed constraint on the pile leg solid model, defining design variables, defining constraint, defining an objective function and performing optimized analysis to obtain the optimal solution of the dimension. According to the method, the deformation of the pile leg is minimum when ship body operation is performed or when a ship is inclined due to the fact that the pile leg are not in contact with the seabed simultaneously in the sinking process, and the ship body bearing reliability is high.

Overcritical compound electroforming system recycle device

The utility model provides an overcritical compound electroforming system recycle device, examine measure and regulate make sets piece, composite particles recoverer, high -pressure pump, CO2 gas cylinder and manometer including valve unit, gas filter, gas reservoir, electroforming liquid memory, magnetic drive pump, electroforming liquid, gas filter includes gas -liquid separation chamber, gas filtration room gentleness body drying chamber, gas filter links to each other with reation kettle and gas reservoir and is used for retrieving gas, the magnetic drive pump links to each other with electroforming liquid memory, electroforming liquid is examined measure and regulate make sets piece and is included that the ion detects groove, ion measuring apparatu and compound electroforming liquid adjustment tank and is used for retrieving and the compound electroforming liquid of allotment, the composite particles recoverer is arranged in retrieving the useful solid particle of compound electroforming ...

Porous electrode internal liquid filling electrolysis electric spark machining system and method

The invention discloses a porous electrode internal liquid filling electrolysis electric spark machining system, which comprises a porous electrode, a machining system, an auxiliary liquid supply system and a motion control system, and is characterized in that the machining system comprises a working liquid box, an electrode clamping device, a workpiece clamp, an auxiliary electrode, a working power supply and an electrolyte; the porous electrode is fixed on the electrode clamping device, and the electrode clamping device drives the porous electrode to rotate; the auxiliary liquid supply system supplies electrolyte to the porous electrode; the motion control system controls the workpiece to move towards the porous electrode; and the anode of the working power supply is connected with the auxiliary electrode and the cathode is connected with the porous electrode. In addition, the invention further discloses a porous electrode internal liquid filling electrolysis electric spark machining ...

Preparation method of aluminum alloy semi solid-state slurry

Cathode-anode synchronous frequency-vibration strong-magnetic auxiliary electro-deposition processing device and method

The invention provides a cathode-anode synchronous frequency-vibration strong-magnetic auxiliary electro-deposition processing device and method. The device comprises a reaction kettle, a vibration assembly, a magnetic control assembly, a mechanical stirrer, an anode basal body, a cathode basal body and a direct-current power supply; the vibration assembly comprises a vibration controller, a vibration rod, an anode hanger, a cathode hanger and a magnet hanger; the magnetic control assembly comprises a magnetic field controller, a first super-conductor magnet and a second super-conductor magnet; the mechanical stirrer, the anode basal body and the cathode basal body are arranged in a main body of the reaction kettle; the anode basal body, the cathode basal body and the two super-conductor magnets can vibrate synchronously at a same frequency. The processing comprises the steps of carrying out preliminary chemical plating treatment for the cathode basal body, installing the anode basal body ...

Method for enhancing magnesium alloy friction stir welding seam through high-entropy alloy powder

The invention provides a method for enhancing a magnesium alloy friction stir welding seam by using high-entropy alloy powder, which comprises the following steps of: firstly, pressing the high-entropy alloy powder into a high-entropy alloy prefabricated sheet, and then cladding the high-entropy alloy prefabricated sheet on the surfaces of two sides of a butt seam of a magnesium alloy plate to be welded to finish friction stir welding. According to the method, the high-entropy alloy powder is adopted as the friction stir welding seam reinforcing material, so that the magnesium alloy friction stir welding seam performance is improved.

Mold and method for testing melting degree of internal chill

The invention relates to a mold for testing the melting degree of internal chill. The mold comprises a main body, wherein the main body is in a rectangular shape, and a rectangular cavity is arranged inside the main body; the bottom of the cavity is communicated with the outside through a pouring channel arranged at one side of the cavity, and the lower end of the pouring channel is communicated with the cavity; a bell mouth is formed in the upper end of the pouring channel, and a plurality of vertically parallel steel bars are arranged inside the cavity; each steel bar is positioned in a vertical plane where a central line of the bottom surface of the cavity is located along the rectangular length direction, and a distance between two adjacent steel bars is equal. A method for testing the melting degree of internal chill by using the mold comprises the steps of pouring, measuring the temperature, solidifying and sampling, cutting samples and observing, carrying out a cycle test, and carrying ...

Metallic 3D (three-dimensional) printing atomization device

The invention relates to a metallic 3D (three-dimensional) printing atomization device which comprises a graphite melt delivery pipe used for delivering liquid metal, an atomizer used for conically diverging the liquid metal and a heating insulation pipe. The graphite melt delivery pipe is arranged in the heating insulation pipe, connected with a gas pressure device and communicated with the inside of the atomizer. The metallic 3D printing atomization device feeds the liquid metal by gas pressure, one atomizer is omitted, consumption of high-pressure gas is reduced, production cost is lowered greatly, blockage of the atomizer cannot be caused, and quality of obtained products is good.

Method for processing zigzag waveguide slow-wave structure by using laser-induced plasma and micro-milling composite preparation process

The invention discloses a method for processing a zigzag waveguide slow-wave structure by using a laser-induced plasma and micro-milling composite preparation process, which comprises the following steps: rapidly processing a high-conductivity oxygen-free copper material by using laser-induced plasma, and generating plasma when a laser beam passes through a liquid dielectric medium, the material on the surface of the workpiece is removed due to the high temperature of plasma and the impact wave pressure effect, and a pre-formed zigzag waveguide slow wave structure is obtained; further, the pre-formed slow-wave structure is subjected to shape modification control through micro milling, the surface quality, the machining precision and the consistency of the laser-induced plasma forming zigzag waveguide slow-wave structure are compensated, and stable forming of the high-aspect-ratio and complex multi-period zigzag waveguide slow-wave structure is achieved; the method can effectively solve ...

Extremely synchronous supplementary electro -deposition processingequipment of strong magnetism of formula that frequently shakes of negative and positive

The utility model provides an extremely synchronous supplementary electric deposition apparatus of the strong magnetism of formula that frequently shakes of negative and positive, including reation kettle, vibration subassembly, magnetic control subassembly, mechanical agitator, positive pole base member, cathode base and DC power supply, the vibration subassembly includes vibration control ware, vibrating arm, positive pole hanger, negative pole hanger and magnet hanger, the magnetic control subassembly includes field controller, first superconductor magnet and second superconductor magnet, mechanical agitator, positive pole base member and cathode base all set up in reation kettle's main part, positive pole base member, cathode base and two superconducting magnet can be with frequency synchronous vibration. Use the utility model discloses a device can be prepared out the surfacing, organize the electropaining layer fine and close, that crystalline grain is tiny, mechanical properties ...

Internal liquid filling type diamond electrode electrolysis electric spark grinding combined machining system and method

The invention relates to an internal liquid filling type diamond electrode electrolysis electric spark grinding combined machining system and method.The machining system comprises a hollow diamond tool electrode, a rotating system, a control system, a liquid supply circulating system, a working liquid box and a power source, and during working, a diamond electrode and an auxiliary electrode immersed in the working liquid box are connected with the power source; the tool electrode generates spark discharge to corrode and soften the workpiece material; grinding, finishing and removing the rotating diamond electrode and the workpiece material to expose a new to-be-processed base material; and meanwhile, an interelectrode electrolyte is continuously updated and supplemented through a hollow channel, the stable spark discharge corrosion removal and material softening process generated between electrodes is guaranteed, then grinding finishing machining is conducted through a diamond tool electrode ...

Electrolytic machining device for complicated nail groove structure on nail anvil surface of endoscope anastomat

The invention relates to an electrochemical machining device for a complex nail groove structure on the nail anvil surface of an endoscope anastomat. The electrochemical machining device comprises a tool cathode unit and a workpiece anode unit. The tool cathode unit comprises a liquid inlet and a tool cathode, the tool cathode is provided with a vertically-through liquid passing groove and an array boss structure located on the lower surface, electrolyte flows in from the liquid inlet and flows to a machining area below the tool cathode through the liquid passing groove of the tool cathode, and the tool cathode is connected with the negative electrode of the power source; the workpiece anode unit comprises a workpiece, a clamp main body, a positioning device and a power leading device, and an array nail groove structure corresponding to the array boss structure is machined on the upper surface of the workpiece through the feeding motion of a cathode; a mounting groove is formed in the upper ...

Device and method for eliminating residual weld joint stress of cylindrical pile leg

The invention provides a device and a method for eliminating the residual weld joint stress of a cylindrical pile leg. The device comprises a bottom plate, a frequency converter, motors, friction wheels and impact heads, wherein the motors and the frequency converter are arranged on the bottom plate; the motors are symmetrically arranged; each friction wheel is positioned on the corresponding motor; the cylindrical pile leg is positioned above the friction wheels; the impact heads are symmetrically arranged on the inner wall or the outer wall of the cylindrical pile leg; each impact head and the surface of a weld joint of the cylindrical pile leg form a 90-degree included angle; impact points are positioned on both sides of the weld joint. The whole device is simple in structure and wide in application range; the method for eliminating the residual weld joint stress of the cylindrical pile leg is convenient to operate, has the capabilities of lightening the labor intensity of workers and ...

Experimental facility simulating gas film continuous casting crystallizer

The invention discloses an experimental facility simulating a gas film continuous casting crystallizer. The experimental facility comprises an underframe, a plastic film bag, a transparent simulating crystallizer cylinder and a stimulating crystallizer cover board, wherein the top surface of the simulating crystallizer cylinder is provided with an annular air duct leading to the inner cavity of the simulating crystallizer cylinder and evenly distributed radial air ducts; the wall of the simulating crystallizer cylinder is provided with an air inlet leading to the annular air duct and a plurality of pressure measuring channels which are at different heights and lead to the inner cavity of the simulating crystallizer cylinder; the air inlet is connected with a gas flow control valve; each pressure measuring channel is connected with a pressure measuring apparatus; the plastic film bag stretches into the simulating crystallizer cylinder through the center hole of the stimulating crystallizer ...

Tolerance analysis method for space dimension chain

The invention provides a tolerance analysis method for a space dimension chain. The method supports large-weight and large-size assembling. The method takes the self-weight and elasticity of a large-weight and large-size assembling body into account, utilizes matrix and three-dimension modeling and finite element analysis to construct a three-dimension space dimension chain, and fully takes the space change of the dimensions and dynamic compensation of assembling accuracy into account. The method utilizes the six degrees of freedom principle of space to construct the matrix and conducts optimized classification and balancing calculation on the space dimension chain, so the size and tolerance design of large-weight and large-size engineering equipment tends to be reasonable, the machining and installing difficulty is reduced, and manual costs are saved.

Method for preparing ceramic microchannel by compounding jet water-assisted laser and micro-milling

The invention provides a method for preparing a ceramic microchannel by compounding jet water-assisted laser and micro-milling, which organically combines a micro-milling processing technology with a laser water jet processing technology. According to the laser water jet machining technology, local materials can be softened at a high temperature in a tiny area through non-contact machining by means of the characteristic that laser energy density is high, meanwhile, the materials which are melted after laser machining and are not solidified again are washed away in time under the impact effect of water jet at a certain speed, and abrasion of a micro milling cutter is effectively reduced; and the machining quality of the ceramic workpiece is improved.

Supercritical-fluid-based 3D electrodeposition machining device and method

The invention provides a supercritical-fluid-based 3D electrodeposition machining device and method. The device comprises a carbon dioxide gas bottle, a high-pressure pump, a digital controller, a reactor, a moving anode assembly, a moving cathode assembly, a direct-current power supply and a cathode matrix serving as a machined part, wherein the reactor is internally provided with a mechanical stirrer; the moving anode assembly comprises a Z-directional linear motor, a driving lead screw, an anode connecting rod and a moving anode; the moving cathode assembly comprises an X-directional linear motor, a Y-directional linear motor, a guide rail, a moving block and a fixture; and when the supercritical-fluid-based 3D electrodeposition machining device is used, the moving anode and the cathode matrix are respectively and electrically connected with the anode and cathode of the direct-current power supply. The machining method mainly comprises the steps of carrying out chemical plating treatment ...

Casting method for thick and large steel casting through internal chill

A casting method for a thick and large steel casting through internal chill comprises the following steps that firstly, the size and addition amount of steel shots and the steel shot addition time are determined according to the computer numerical simulation method; secondly, the steel shots are machined, the machined workblank steel shots are washed in acid liquid and dried to become clean steel shots to be used later; thirdly, during pouring, metal liquid enters a casting cavity through a pouring channel, and when the metal liquid in the casting cavity reaches to a certain height, the clean steel shots are added to the steel shot channel; fourthly, the clean steel shots enter the casting cavity and suspend in the metal liquid under the gravity and flowing action of the metal liquid, heat exchanging is carried out between the steel shots and the surrounding metal liquid, the steel shots are quickly heated to the temperature of the metal liquid, before the casting is solidified, certain ...