Natural knee joint femur flexion and extension axis drilling positioning device

A natural knee joint femur flexion and extension axis drilling positioning device comprises a body, a drilling plate frame, a lifting frame and a positioning nail frame. The body comprises a base, lower side plates and upper side plates. The drilling plate frame comprises sliding supports, sliding blocks, a guide plate, a drilling guide sleeve, a drilling head and a guide block. The positioning nail frame comprises a left positioning nail side plate, a front positioning nail side plate, a rear positioning nail side plate and a right positioning nail side plate. The natural knee joint femur flexion and extension axis drilling positioning device is simple in structure, accurate in positioning, convenient to operate and use and capable of improving the coincident accuracy of the flexion and extension axis of an analog machine and the actual flexion and extension axis of a natural knee joint and accurately finding and positioning the flexion and extension axes of thighbones with different types ...

System for designing individual artificial knee joint prosthesis based on parameter driving

The invention relates to a system for designing an individual artificial knee joint prosthesis based on parameter driving, in particular to individual parameter driving of a femoral prosthesis model and belongs to the field of design of medical products. The system for designing the individual artificial knee joint prosthesis based on parameter driving is based on the interactive visual medical image processing and computerized design technique. According to the system for designing the individual artificial knee joint prosthesis based on parameter driving, a skeleton model is re-constructed by means of an interactive medical image processing module, and bone morphology parameter values are obtained through measurement; individual parameters of prosthesis design are analyzed through a femoral prosthesis individual parameter analyzing module; parametric modeling of prosthesis individual parameters is completed by establishing a parameter expression, establishing a parameter preliminary sketch ...

Customized forming method for gradient porous structure ceramic

The present invention discloses the customized forming process of gradient porous structural ceramic. By means of the combined fast light solidifying and gel molding formation technology, porous ceramic product in spherical pore and micro tube combining structure and complicated profile may be obtained. The technological process of the present invention is simple and has low cost, high precision and high forming efficiency.

Image method for measuring engineering embedding material

Self -fixing type artificial vertebral body

Laser metal direct forming method of liquid argon jet cooling directional solidification

The invention discloses a laser metal direct forming method of liquid argon jet cooling directional solidification. The method is characterized in that: positive temperature gradient is kept all the time along the Z-axis direction in a molten pool in the subsequent forming process by adopting a method of liquid argon jet and quick cooling performed below the formed layer once a certain layer number is stacked. Meanwhile, the liquid argon for cooling is converted into argon gas and can also be used for reducing oxygen content in an argon protection box. Therefore, the columnar crystal tissue in a formed piece is continuously grown from a substrate along the Z-axis forming direction, and the formed piece obtains complete directional solidification columnar crystal tissue.

Cavity, soft tissue perfusion culture system and soft tissue stretchability test system

The invention discloses a cavity, a soft tissue perfusion culture system and a soft tissue stretchability test system. The cavity comprises an upper layer structure, a lower layer structure, two fixing blocks and two fixing parts. The soft tissue perfusion culture system comprises a liquid charge pump, a three-way valve, a liquid collecting device and the cavity. The soft tissue stretchability test system comprises a first fixture fixing plate, a second fixture fixing plate, a step motor, a base, a first fixing plate, a second fixing plate, an optical shaft, a linear sliding shaft and the soft tissue perfusion culture system. By utilizing the cavity, the soft tissue perfusion culture system and the soft tissue stretchability test system, the aseptic environment and perfusion culture conditions can be obtained when the soft tissue is stretched, and meanwhile, the stretching degree of the soft tissue can be controlled accurately.

Desktop 3D (three-dimensional) printer with replaceable spray nozzle

The invention discloses a desktop 3D (three-dimensional) printer with a replaceable spray nozzle. The desktop 3D printer comprises at least one X-directional movement system and at least one Y-directional movement system, wherein the X-directional movement is as follows: a stepper motor drives a pair of horizontal supporting blocks (which are connected with a synchronizing belt) through the X-directional synchronizing belt, so that a spray nozzle installation seat which is arranged on a slider between the two horizontal supporting blocks can horizontally move in the X direction; the spray nozzle installation seat is also connected with a Y-directional synchronizing belt, and another stepper motor drives the Y-direcitonal synchronizing belt to realize the horizontal movement of the spray nozzle installation seat in the Y direction; and the desktop 3D printer is characterized in that a replaceable spray nozzle is arranged on the spray nozzle installation seat, and the replaceable spray nozzle ...

High-performance SiC ceramic-based composite material aero-engine blade manufacturing method

The invention discloses a high-performance SiC ceramic-based composite material aero-engine blade manufacturing method. According to the invention, an aero-engine blade mold is prepared with a 3D printing technology; with a gel injection molding method, a SiC ceramic blank part with added carbon fiber is prepared; through processes such as freeze-drying and degreasing, a porous SiC ceramic preform is obtained; the preform is subjected to organic matter precursor impregnation cracking several times, and the pores of the preform are filled with a cracking product, such that preliminary compactness is achieved; and for ensuring the strength and compactness of the part, with a thermal isostatic pressing method, the high-performance SiC ceramic-based composite material aero-engine blade is manufactured. According to the method, various near-net-shape forming methods are combined, such that defects of difficult processing of the SiC material are overcome. Compared with traditional alloy blades ...

A bionic liver tissue engineering scaffold and forming process thereof

Vibration isolation metamaterial structure design method based on machine learning

The invention relates to a machine learning-based vibration isolation metamaterial structure design method, which comprises the following steps of: by adopting a machine learning method, selecting a basic optimization model of a vibration isolation metamaterial structure by taking a mechanical metamaterial as an object, and constructing a fitness function adaptive to the required structural equivalent stiffness; constructing a plurality of initial configurations by adopting a genetic algorithm according to each to-be-optimized parameter of the basic optimization model; then using finite element simulation software to evaluate the fitness function of each genetic algorithm configuration; screening a configuration with a large fitness function, and reserving the configuration as a parent of a next-generation configuration; repeating until the fitness function between two adjacent generations reaches a required threshold value, and obtaining an optimal vibration isolation metamaterial structure ...

Double-chain bionic radiation shielding structure and manufacturing method thereof

The invention discloses a double-chain bionic radiation shielding structure and a manufacturing method thereof, the double-chain bionic radiation shielding structure comprises a plurality of shielding units arranged in an array, each shielding unit comprises a first single chain used for absorbing gamma rays, a second single chain used for absorbing neutrons and a cladding used for playing a supporting role and slowing down the neutrons, the first single strand and the second single strand are spirally wound according to a double-strand DNA spiral structure to form a cylindrical core body, and the cladding wraps the outer side of the core body, so that the outer side of the shielding unit is in a regular prism shape. The invention designs a light high-efficiency polymer matrix radiation shielding structure capable of realizing moderation and timely absorption of neutrons and gamma rays in all directions, and provides an additive manufacturing method adaptive to the shielding structure aiming ...

Capillary type encapsulation method of bare F-P optical fiber transducer

The invention discloses a capillary type encapsulation method of a bare F-P optical fiber strain transducer, comprising: determining outer diameter dimension of each cavity according to the outer diameter dimension of a protective sleeve of the F-P optical fiber strain transducer and that of the capillary to manufacture a silica gel die, fixing the F-P optical fiber strain transducer and the capillary in the cavities of the silica gel die, ensuring that the axis of the F-P optical fiber strain transducer and that of the capillary are centered by using the coaxiality of the cavities of the silica gel die, pouring epoxy resin encapsulation material into a pouring gate of the silica gel die, then placing the silica gel die into a vacuum box for vacuum pumping, sucking the diffluent epoxy resin encapsulation material into the capillary provided with the F-P optical fiber transducer, and preparing into a recyclable F-P optical fiber strain transducer after solidification. The F-P optical fiber ...

Solid forming method of active cell-hydrogel organ structure

The invention provides a solid forming method of an active cell-hydrogel organ structure. The method comprises the following steps: firstly designing a hydrogel unit model according to natural organs; manufacturing a physical prototype of the unit by utilizing a micro-manufacturing technology, and then filling the physical prototype to obtain a negative structure; treating the surface of the negative structure, and then filling a negative die with a biological material-cell mixed solution; gelating the mixed solution in a cross-linking manner to obtain an active cell-hydrogel unit with a biomimetic blood flow channel; locating and superposing layer by layer and then performing secondary cross-linking to form the active cell-hydrogel organ structure; and finally culturing in vitro or implanting in vivo to construct a pre-vascularized active organ precursor. In the method, by assembling the two-dimensional active cell-hydrogel structure unit in a superposition manner, a complicated three-dimensional ...

Rigidity-controllable material oriented to material increase manufacturing technology and manufacturing method thereof

The invention relates to a rigidity-controllable material oriented to a material increase manufacturing technology and a manufacturing method thereof. The rigidity-controllable material comprises, by mass, 10-40 parts of acrylic oligomer, 60-90 parts of alkyl acrylate and 0.1-3 parts of ultraviolet light photoinitiator, and the acrylic oligomer, wherein the alkyl acrylate and the ultraviolet light photoinitiator are sequentially mixed and evenly stirred to prepare a photocuring raw material; a three-dimensional model for a rigidity-controllable material device is built, discretization is carried out on the surface of the three-dimensional model to generate a three-dimensional digital model file, and a machining file capable of being identified by a material increase manufacturing device is led out after supporting adding, model layered discretization and machining path generation are carried out on the three-dimensional digital model file; the photocuring raw material is manufactured into ...

Fusible pattern moulding method of silicon carbide with complicated shape

The invention discloses a method for moulding and shaping complex-shaped carborundum. According to the requirements of the actual shape of a carborundum moulded piece, a paraffin female die is designed and processed; then phenolic resin mixture is poured in the die and is solidified for shaping at room temperature. Later, by deep solidification and carbonization, the multi-hole carbon blanker with the shape of the moulded piece is prepared. However, the paraffin die is melted during deep solidification and removed automatically; meanwhile, the melted paraffin is collected for recycling. Finally, siliconizing is carried out on the multi-hole carbon blanker, and the moulded piece of carborundum with the designed shape is prepared, which can be applied to use in the environments of corruption, abrasion, oxidation and high temperature. The method effectively solves the problems of complex shaping and net shaping of carborundum, and is characterized by low cost, one-step shaping, easy industrial ...

Reticle increment calibration method for laser galvanometer system

Provided is a reticle increment calibration method for a laser galvanometer system. A reticle increment scanning and optical sensor measurement analysis method is adopted, a traditional calibration target is not needed, only an automated measuring device simple in structure is needed, under the circumstance that calibration precision is guaranteed, influences of human factors are effectively reduced, and workloads are reduced; meanwhile, the method can be well applied to calibrating large-size planes.

Bionic construction method of artificial organics

A bionic construction method of artificial organics includes: reconstructing a three-dimensional computer model of macroscopic appearance of an artificial organ, preparing a resin model close to a natural organ in shape by means of the 3D (three-dimensional) printing technique, sputtering a metal film to the surface of the resin model, depositing a micro-nano fiber structure layer, removing the resin model to obtain an artificial organ film, importing the three-dimensional computer model into a computer for materialization, designing a bionic vessel micro-channel structure, building a layered structure model, preparing bionic extracellular matrix of the artificial organic by means of the 3D printing technique, wrapping the bionic extracellular matrix with the artificial organ film, and sewing the contact edges of the two layers of the artificial organ film to obtain the artificial organ. The method is applicable to construction of the multi-scale multi-layer vessel structured artificial ...

Powder 3D printing method based on water-based inorganic binder

The invention discloses a powder 3D printing method based on a water-based inorganic binder. The powder 3D printing method comprises the following steps: firstly, using deionized water as a binder solvent, adding a chloride salt as a binder component, adding a co-volatile agent, a coloring agent and a modifying agent, and mixing to form an aqueous inorganic salt solution as a binder for a powder 3D printer; secondly, using inorganic oxide powder corresponding to the used chloride as a reactive material, mixing the solid binder with 3D printer raw material powder, and then adding flux to form mixed powder as a material for the powder 3D printing; finally, performing the powder 3D printing by using the binder and the mixed powder. By the powder 3D printing method, rapid powder 3D printing of a product with complex structure is achieved, and the environment friendliness of the manufacturing process is ensured, the production cost is reduced and the product quality is improved.

Multi-point combined type injection mould and shaping process thereof

The present invention discloses a multi-point combined type injection mould and a shaping process thereof, which is used for manufacturing high-performance personalized parts. The multi-point combined type injection mould comprises an outer frame body and an inner module. The outer frame body is formed by steel sheets and is internally provided with a flow channel, a positioning groove, a positioning hole and a plurality of uniformly arranged locking bolts. The inner module comprises a steel movable clamping plate, a pure aluminum backing plate and a movable steel needle set. The injection mould is shaped through the discretization of continuous planes and the surface of the inner cavity of the injection mould is constructed by means of a large number of movable steel needles on the two sides thereof. After that, required high-performance personalized parts can be manufactured through the injection moulding process. According to the technical scheme of the invention, the surface of the ...

Atomization technology-based light-cured rapid prototyping product surface roughness reducing method

The invention discloses an atomization technology-based light-cured rapid prototyping product surface roughness reducing method. The method adopting a liquid wax emulsion as a raw material comprises the following steps: heating the material, and atomizing to form uniform atomization environment in an atomization box; placing a light-cured rapid prototyping product in the atomization box, and uniformly coating the internal and external cavity surfaces of the light-cured rapid prototyping product with the atomized wax emulsion for a certain time, taking out he light-cured rapid prototyping product, heating the light-cured rapid prototyping product in an oven, and drying to remove water in the emulsion to form an extremely thin coating on the internal and external cavity surfaces of the light-cured rapid prototyping product. The coating can eliminate a step effect generated through a light curing rapid molding technology and reduce the surface roughness of the light-cured rapid prototyping ...

Method for reducing light-cured rapid prototype component surface roughness

The present invention discloses one kind of physical and chemical method to lower the surface roughness of stereo optically cured body. The method includes the following steps: compounding resin paint through adding surfactant not more than 0.1 %, active diluent in 5-30 % and leveling agent not more than 1 % into resin and regulating the viscosity of the resin paint to 0.25-0.70 Pa.S; and coating the resin paint to the surface of the body to form homogeneous coating of thickness within 300 micron, so as to reduce the roughness from 6-15 micron to 3 micron. The method can eliminate the step effect of stereo optically curing, and has excellent application foreground.

Photo-curing 3D (three dimensional) printer based on helical scanning and flexible interface

A photo-curing 3D (three dimensional) printer based on helical scanning and a flexible interface comprises a stepper motor in the middle of the bottom of the printer, the output of the stepper motor is connected with an electric slip ring, a linear feed movement platform is arranged on the electrical slip ring, an integrated LED (light-emitting diode) camera lens is connected to the linear feed movement platform, a film supporting glass holder is arranged outside the integrated LED (light-emitting diode) camera lens, the integrated LED (light-emitting diode) camera lens supports film supporting glass, the film supporting glass is contacted directly with a nonstick film thereon, the nonstick film is fixed on the integrated LED camera lens by a resin groove and a resin groove film fixing cover, the nonstick film supports photosensitive resin, a solidified resin layer is attached onto a lifting head, the lifting head is connected with a lifting system, the LED camera lens is driven to perform ...

Powder groove with vacuumizing function for selective laser sintering

The invention discloses a powder groove with a vacuumizing function for a selective laser sintering. The powder groove comprises four side plates and a bottom plate, wherein the side plates are connected along the periphery of the upper surface of the bottom plate so as to form a cubic powder groove with five open surfaces. The powder groove is characterized in that the side plates and a support plate are provided with two surfaces of small-hole cut-through plates, wherein the side plates have multiple porous regions; the outer wall of each side plate is respectively provided with a lateral groove plate; the inner wall of each lateral groove plate is provided with at least two transverse rectangular grooves at equal intervals from top to bottom; each rectangular groove is opposite to one porous region of each side plate and is provided with a bleeder hole; the lower surface of the support plate is connected with a lower groove plate; the inner wall of the lower groove plate is provided ...

Method for manufacturing artificial soft tissue body carried with vascular net flow channel

The invention provides a method for manufacturing an artificial soft tissue body carried with a vascular net flow channel. The method comprises the following steps of: firstly designing a soft tissue scaffold model with a vascular structure, layering the soft tissue scaffold model one by one at equal distance, and manufacturing photomask plates of various layers; then uniformly mixing a cell and a collagen solution, and injecting a photocuring hydrogel and a photoinitiator to obtain a photocuring composite solution; injecting the photocuring composite solution to a work table, covering with the photomask plates, curing the photocuring composite solution by adopting a surface exposure technology, and then carrying out curing accumulation layer by layer to obtain a photocured hydrogel soft tissue scaffold with the vascular structure; planting vascular endothelial cells to the vascular structure of the photocured hydrogel soft tissue scaffold, wherein the vascular endothelial cells are attached ...

Making method of surface double-walled hollow turbine blade

The invention discloses a making method of a surface double-walled hollow turbine blade, and belongs to the technical field of rapid casting. The method comprises the following steps: designing and preparing negative resin of a double-walled hollow turbine blade containing impact openings, and separately preparing a resin outer wall corresponding to a double-walled cooling channel, and resin prototype; making the ceramic core of the double-walled cooling channel through a compression molding technology, inlaying the ceramic core in the resin prototype, and respectively assembling the resin prototype with the outer wall and the resin shell to make resin prototype containing the ceramic core; making a ceramic mold blank containing the ceramic core through a gel injection molding technology, freeze-drying, carrying out degreasing pre-burning, and post-processing a ceramic mold; and making a turbine blade through a casting technology, and carrying out laser or electric spark processing to obtain ...

一种可降解型生物活性人工骨的制备方法

... 本发明公开了一种可降解型生物活性人工骨的制备方法，采用酸性条件下的液相沉淀反应制备超细化高纯度的CPC固相成份，并采用高温固―固相反应生成CPC固相体系。通过液相复合的方法将BMP均匀复合在CPC的内部，可以保护BMP的生物学活性，使BMP能够在固化后的CPC中均匀分布，在移植到体内后随着新骨形成和材料降解而缓慢释放。扫描电镜观察发现，复合BMP后材料的晶体之间孔隙加大，不仅利于新骨长入，对于材料的降解也起到促进作用。由于BMP使CPC从无机材料变成具有强烈诱导成骨作用的生物学活性材料，因此激活了以新骨形成为特征的机体局部代谢，实验观察证明降解速度明显加快，显示出很好的临床应用前景。可用于临床骨折、骨不连、骨缺损、骨质疏松等疾病的治疗，并可用于兽医学中伴有骨折的治疗。 ...

Biological fusion type three-dimensional neural electrode

The invention discloses a biological fusion type three-dimensional neural electrode. The biological fusion type three-dimensional neural electrode comprises a depth sensing unit and a plane sensing unit. Local field potential of a cortical surface layer and deep electroencephalogram composite signals can be obtained at the same time, and good biocompatibility and compliance are achieved. The maximum length of the plane sensing unit is 5-20 mm, the thickness is smaller than 100 microns, in order to guarantee the precision of the neural electrode, the minimum diameter of the sensing line is smaller than or equal to 50 microns, the diameter of the depth sensing unit is smaller than or equal to 75 microns, and the implantation depth range is 2-5 mm. The number of sensing channels of the plane sensing unit part is 16-50, and the number of sensing channels of the depth sensing unit part is 25-60. In the manufacturing process, coupling structures such as a microchannel are reserved on the plane ...

Double-layered bionic pseudo-structure of cervical intervertebral disci, and its mfg. process

Tissue engineering and 3D printing meat tissue production processing system and method

A tissue engineering and 3D printing meat tissue production processing system and method are provided. The system comprises a pump, a valve, a cultivation cavity, a cultivation liquid circulating unit, a stimulation unit, a temperature control unit, a nutrient substance adjusting unit and a feedback adjusting unit. The invention further discloses a meat tissue processing method. The method comprises the following steps of circulating cultivation liquid, applying stimulation factors, supplementing nutrients and adjusting the taste. With the adoption of the system and method provided by the invention, the meat tissues can be promoted to amplify in vitro busing a multi-factor coupling cultivation mechanism, and the meat tissues are close to, even better than natural meat tissues in the aspects of shapes, colors and lusters, tastes and nutrient content; meanwhile, the meat tissues which are applicable to people with special requirements are manufactured through adjusting component ratios in ...

Drug-loading degradable magnetic anastomat

The invention provides a drug-loading degradable magnetic anastomat comprising two same structure units. Each structure unit comprises an annular body and a plurality of magnets. Each annular body is composed of an inner ring and an outer ring. The magnets are evenly arrayed between the inner rings and the outer rings along the circumferential directions of the annular bodies. The inner rings can be made of degradable materials, and the outer rings can be made of mixtures of drugs for simulating healing of anastomotic stomas and the degradable materials. The drug-loading degradable magnetic anastomat formed by the annular bodies with outer layers and inner layers and the magnets arrayed along circumferences, the inner rings can be made of the degradable materials, and the outer rings can be made of the mixtures of drugs for simulating healing of anastomotic stomas and the degradable materials, so that magnetic pressure anastomosing can be realized at the initial stage of tissue cavity anastomosing ...

Bionic artificial semi-joint body and manufacturing technique thereof

Direct light-curing fabrication method of hollow blade ceramic cast

The invention relates to a method for directly making a hollow blade ceramic mold based on a photo-curing process. The method is as follows: firstly, ceramic powder and pre-mix liquid are evenly mixed so as to make ceramic slurry; secondly, according to a hollow blade model, a hollow blade mold model containing a gating system is obtained, and the ceramic slurry is directly made into a ceramic mold biscuit on a photo-curing forming machine according to the hollow blade mold model; then, the ceramic mold biscuit is dewatered to obtain a dry ceramic mold; finally, the dry ceramic mold is placedin a high-temperature baking furnace so as to carry out degreasing and sintering, thereby making the hollow blade ceramic mold. The ceramic mold can be used in the casting of a hollow blade, and replaces a multi-layer ceramic shell and core manufacturing process adopted in the prior investment casting. The method does not need the processes of investment pattern making, slurry coating and sand spreading ...

Image method for measuring engineering embedding material

An engineering embedding material for embedding the part to be tested, including its internal cavity, is prepared from biphenol-A epoxy resin through adding polyamide resin as solidifying agent and toughening agent, and adding fine graphite powder or white gypsum powder as filler to improve its adhesion and change its color for higher grayscale contrast to the part to be tested. Its advantages are high flowability before solidification, slow solidifying, and excellent adhesion and cutting toughness.

Method for determining laying position of casting mold in directional solidification casting

The invention discloses a method for determining the laying position of a casting mold in a directional solidification casting. The method includes the steps: dividing the outer wall of a high-temperature alloy casting into a convex structure area and a concave structure area; determining the mass center connecting curve of the high-temperature alloy casting; selecting a plurality of transverse sections along a direction parallel to the growth direction of high-temperature alloy casting directional crystals; analyzing heat dissipation of the selected transverse sections to obtain the average radiative angle factor of a concave portion of each transverse section, adjusting the laying position of the casting mold in a directional solidification furnace, comparing the average radiative angle factors of the concave portions of the selected transverse sections at different positions in the directional solidification furnace, and determining the optimal laying position of the casting mold in ...

Accuracy correction for light-curing fast formation

Dual-scale micro-structure artificial bone scaffold and preparation method thereof

Method for manufacturing high-strength composite bone and cartilage support with complex molded surface

The invention discloses a method for manufacturing a high-strength composite bone and cartilage support with the complex molded surface. The method includes the steps that firstly, a three-dimensional model of a bone and a first three-dimensional model of a cartilage are acquired, a second three-dimensional model of the cartilage is drawn according to the first three-dimensional mode of the cartilage, a first mold and a second mold are manufactured according to the first three-dimensional model of the cartilage and the second three-dimensional model of the cartilage, a divergent through pipeline mold is drawn in the three-dimensional model of the bone, a ceramic bone support is acquired according to the three-dimensional model of the bone and the divergent through pipeline mold, a connecting medium penetrates through a divergent through pipeline on the ceramic bone support, a bonding medium is used for connecting the connecting medium with the ceramic bone support, and then the high-strength ...

Layered preparation method for membrane bracket of controllable micro-nanofiber structure

The invention discloses a layered preparation method for a membrane bracket of a controllable micro-nanofiber structure. The method includes the following steps that (1) raw materials are put in an injector; (2) a high voltage electric field is formed between a nozzle of the injector and a receiving platform, the flow of the raw materials ejected out of the injector is controlled, the raw materials form a Taylor cone after being ejected out of the nozzle of the injector under the action of the high voltage electric field, and the Taylor cone is divided into a plurality of jet steams; (3) the jet steams formed in the second step are deposited on the receiving platform to form a plurality of nanofibers, and a two-dimensional mobile platform drives the receiving platform to move in an xy plane until the upper layer of the to-be-prepared membrane bracket of the controllable micro-nanofiber structure is prepared; (4) a z-axis motor drives the nozzle of the injector to move upward until the to-be-prepared ...

Device for increasing density of fused deposition forming part of high polymer materials

The invention discloses a device for increasing the density of a fused deposition forming part of high polymer materials. The device comprises an electrode plate, a forming supporting plate fixed on the electrode plate, and a spray head module which can make three-dimensional motion on the forming supporting plate. The device is characterized in that the electrode plate is connected with a direct-current high-voltage power supply, and an electric field is formed under the spray head module and above the forming supporting plate; a charge applying instrument is arranged in the spray head module, so that the high polymer materials in fused state, which are extruded from the spray head, carry negative charges.

Rotary roller pin type composite material interlayer connection and enhancement device and method thereof

The invention discloses a rotary roller pin type composite material interlayer connection and enhancement device and a rotary roller pin type composite material interlayer connection and enhancement method. The device is applied in the manufacturing field of resin matrix composite components, and comprises a winding drum, a fibre tow, a rotary drum, a sectional pin, and a composite material pre-form piece in process. The device penetrates the fibre tow wound around the winding drum from the composite material pre-form piece surface by the sectional pin on the rotary drum in the normal direction, and through the flowing, penetration and curing cementation of the resin between layers of the composite material, the fibre tow can be fixed along the composite material pre-form piece surface inthe normal direction, a plurality of layers are connected in series in the thickness direction, and the interlayer connection of the composition material is increased. The device has the advantages of simple ...

Expandable multi-material sprayer system for 3D (Three-Dimensional) printing

The invention discloses an expandable multi-material sprayer system for 3D (Three-Dimensional) printing. The system comprises a base, a plurality of wire feed units and a driving unit, wherein each wire feed unit comprises a connecting rod, a nozzle, a first wire feed wheel, a second wire feed wheel and an electromagnet; one end of each connecting rod is hinged on one side of the base through an installation base; the second wire feed wheels of the wire feed units are installed on the base through one rotary shaft; the first wire feed wheels and the nozzles are installed on the connecting rods; a plurality of electromagnets corresponding to the other ends of the connecting rods are fixedly arranged on the base; the driving unit for driving the rotary shaft to rotate is installed on the base. According to the system disclosed by the invention, on the premise of not adding the quantity of motors, the wire feed units can be expanded according to demand; whether each wire feed unit works or ...

UV (ultraviolet)-assisted microinjection molding device

A UV (ultraviolet)-assisted microinjection molding device comprises a molding device body, an external UV light source and an externally connected injector, wherein the molding device body comprises a support base, a support pillar arranged on the support base and a mold allowing penetration of the external UV light source, a mold cavity is connected with an externally connected vacuum pump, and a gate matched with an injection nozzle is further formed in the mold; and the injection nozzle is connected with the externally connected injector, and a hydraulic push rod connected with the mold is arranged at the top of the support pillar. By means of the injection molding device, photocuring is performed by UV, a melting process of the traditional injection molding is omitted, the mold temperature is not required to be controlled, and equipment is simpler than the traditional injection molding; the viscosity of a photocuring material is much lower than that of molten polymer, the photocuring ...

Integrated powder color 3D (Three-Dimensional) printer

The invention discloses an integrated powder color 3D (Three-Dimensional) printer. The integrated powder color 3D printer comprises a rack, wherein a powder storage tank and an external supply adhesive box are arranged at the top of the rack; the powder storage tank and the lower part of the external supply adhesive box are connected with a working cavity; the lower part of the working cavity is connected to a sealing post-processing cavity through a partitioning plate; a sieve screen and a powder recycling box are arranged at the lower part of the sealing post-processing cavity; a lifting device is connected to the rack at the sealing post-processing cavity; the lifting device is connected with a vacuum negative-pressure support table; the vacuum negative-pressure support table comprises an upper screen plate, a sealing felt, a lower screen plate, an air filtration screen and a bottom cavity. The integrated powder color 3D printer is capable of guaranteeing the sealing property and the ...

Multi-motion-degree-of-freedom biological hybrid robot, working method and manufacturing method

The invention provides a multi-motion-degree-of-freedom biological hybrid robot, a working method and a manufacturing method. The multi-motion-degree-of-freedom biological hybrid robot comprises a deformation module, a driving module and an orientation module. The driving module is axially arranged on the deformation module in a surrounding and sleeving manner, and the orientation module is adhered to the deformation module and is connected with the edge of the front end of the deformation module; the driving module is an engineering muscular tissue, and the driving module controls the deformation module through contraction of different parts of the muscular tissue; the deformation module is of a deformation structure similar to water elastic folded paper. Three-degree-of-freedom movement such as advancing, steering and overturning can be achieved by stimulating different parts of the driving module through the electrodes, and the problem that work cannot be completed in a single-degree-of-freedom ...

Photocureable rapid shaping indirect manufacturing method for controllable microtube structure stand

A process for quickly and indirectly preparing the scaffold with controllable microchannel structure by optical solidifying method includes such steps as acquiring actual CT data, using 3D CAD software to reconfigure the profile of bone, designing internal microchannels and controlling the size, shaping, direction, branches and mutual communication of microchannels, using optical solidifying apparatus to manufacture resin mould, filling biologic materiall, solidifying, and thermal decompsing to remove said resin mould.

High-entropy alloy hot-end part manufacturing method of turbine engine on basis of selective laser melting

The invention discloses a high-entropy alloy hot-end part manufacturing method of a turbine engine on the basis of selective laser melting and belongs to the technical field of manufacture of hot-end parts of the turbine engine. The high-entropy alloy hot-end part manufacturing method includes firstly selecting five or more of eight kinds of high-melting metal powder of tungsten, titanium, zirconium, hafnium, vanadium, niobium, tantalum and molybdenum, and mixing the powder uniformly according to a certain mole ratio to obtain high-entropy alloy powder; setting up a three-dimensional solid model of a hot-end part of the turbine engine, slicing and layering by software to obtain profile data of various sections, and importing the data into a quick forming device; quickly forming a hot-end part blank of the turbine engine by the SLM technology; thermally treating and finely processing the blank to obtain the high-temperature high-entropy alloy hot-end part of the turbine engine. The formed ...

Device for controlling gel content of in-situ solidifying fiber placement machine

The invention discloses a device for controlling the gel content of an in-situ solidification fiber placement machine. The device comprises a resin-supplying control mechanism, a gel-extruding mechanism, a tension control mechanism and a flow control mechanism, wherein, the resin-supplying control mechanism is arranged above the gel-extruding mechanism; the tension control mechanism is arranged at the front end of the gel-extruding mechanism and used for adjusting the system tension of the device; the flow control mechanism is arranged at the bottom of the resin-supplying control mechanism and used for controlling the flow of resin pouring onto the glass fiber; and the flow control mechanism is used for pouring the resin onto the glass fiber, and the gel-extruding mechanism is used for extruding the resin on the glass fiber into the glass fiber. The invention has the advantages of simple structure, convenient use and low cost, and the invention can realize the accurate control over the ...

Three-dimensional reverse evaluating measurer with digitally controlled miller as machine tool

The 3D reverse evaluating measurer with digitally controlled miller as machine tool is fast located and connected to digitally controlled miller in hanger bracket mode to constitute one 3D reverse evaluating measurement system, which may be used to perform precise measurement to the inner and outer contour of any complicated parts with cutting scrap machining performance. The 3D reverse evaluating measurer consists of hanger bracket connecting mechanism, computer control system, digital camera mechanism and scrap eliminating mechanism. After positioning and connecting, the digitally controlled miller performs three-coordinate linear motion, the measurer completes image acquisition, cross section cleaning, signal and data transmission. The present invention makes it possible to expand the application of traditional digitally controlled facilities.

Testing method for improving metal laser direct-forming accuracy

The invention discloses a testing method for improving the metal laser direct-forming accuracy, which respectively adopts persistent wave, sine wave and square wave loading to perform the laser single-pass metal forming test under the condition of same average output power to obtain the change law of the single-pass metal forming section under different wave forms. The stacking forming of thin-wall parts can be realized by utilizing the sine wave and the square wave and setting reasonable parameters. In order to obtain a same laser metal direct-forming part, the power output of the square wave is reduced by 20-30 percent compared with the persistent wave, the square wave can not only reduce the heat input and the heat accumulation, but also have less heat affected zone during the forming so as to be beneficial to reducing the characteristic size of the part and improving the forming accuracy of the metal direct-forming part. The method has the significance with respect to the part forming ...

Combined type magnetic anastomat

The invention provides a combined type magnetic anastomat. The magnetic anastomat comprises two magnetic rings, wherein each magnetic ring comprises an annular shell main body; an inner filling material and a plurality of magnets which are arranged uniformly are arranged in each annular shell main body; the inside of each annular shell main body is filled with the inner filling material except for space with the magnets; each annular shell main body is provided with an annular cover plate of which the shape corresponds to that of the annular shell main body; the annular shell main bodies and the annular cover plates are made of degradable materials; and the inner filling materials are degradable materials or dissoluble materials. In the preliminary stage of anastomosis, magnetic-pressure anastomosis on the magnetic rings can be carried out by magnetic force provided by the magnets; and in the later stage of the anastomosis, the sizes of the magnetic rings are reduced along with degradation ...

Method for improving high-temperature performance of alumina-base ceramic core

The invention discloses a method for improving the high-temperature performance of an alumina-base ceramic core, which comprises the following steps of: firstly, preparing an alumina-base ceramic core blank by adopting a gel casting molding process; secondly, preparing an alumina-base ceramic core prefabricated body with a plurality of holes and certain room-temperature anti-bending strength by freezing, drying and pre-sintering; thirdly, allowing penetrating fluid to seep into the alumina-base ceramic core prefabricated body under the conditions of vacuum and external pressure, drying, removing gel and soaking under vacuum and at pressure for three times; and finally, sintering at a high temperature to obtain the required alumina-base ceramic core. The alumina-base ceramic core prepared by the invention has high high-temperature performance and high core-removing property, can meet the process requirements of a hollow turbine blade on directional casting and single-crystal casting and ...

Method for preparing ceramic-based three-dimensional photonic crystals with photo-curing direct molding

The invention discloses a method for preparing ceramic-based three-dimensional photonic crystals with photo-curing direct molding. The process comprises the following steps: firstly, preparing a ceramic sizing agent; then carrying out photo-curing direct molding on the ceramic sizing agent by a rapid molding machine to prepare the ceramic-based three-dimensional photonic crystal according to CAD model design data; and finally washing, drying and roasting the prepared photonic crystal. The method has simple manufacturing process and strong structure controllability, solves the difficult problems for carrying out active design and effective control manufacture on the photonic crystal with a random complex structure, has the advantages which other manufacturing methods do not have and can beused for manufacturing the three-dimensional photonic crystal with arbitrarily complex structure.

Soft tissue engineering scaffold and preparation process thereof

The invention discloses a soft tissue engineering scaffold and a preparation process thereof. Millimeter-grade pellets and films are combined together to form a cell scaffold by a curling process or superimposing process. The pellets and the films can be made from different biological materials so as to fully play different roles of both the pellets and the films, wherein the films are made from an elastic biological material and used for accommodating the pellets; the elastic biological material is provided with a millimeter-grade pit structure of which the size and the shape correspond to those of the pellets; and the pellets are made from a material which has high biocompatibility. In order to increase the conduction, pores are formed on the pellets, contact points between the films and the pellets and areas among pits. The pellets and the films can be independently compounded with cells to form a cell scaffold compounded body respectively, then the pellets are placed into the pitsformed ...

Manufacturing method of core for casting engine exhaust manifold

The invention relates to a manufacturing method of a core for casting an engine exhaust manifold, comprising the following steps of: 1, manufacturing a resin assembly mould by a photo curing fast-shaping technique; 2, manufacturing reinforcing iron wires in shape of spatial spiral curve same as the core; 3, filling sands in the mould and putting into the reinforcing iron wires manufactured in the step 2; 4, scraping resin sands along a mould sectional surface by a scraper to make the resin sands protrude a little, and then folding the mould to press tightly; 5, opening the mould to take out the core and carrying out the proper post-treatment on the core after the resin sands are solidified. In the invention, the complex core resin assembly mould manufactured by the fast-shaping method has light weight and good strength, and the surface roughness thereof can also achieve Ra=3.2mum; therefore, in the premise of guaranteeing the quality of the manufactured core, the manufacturing cost and ...

Method and appts. for optical solidifying and shaping by line scan with non-laser light source

Production of porous-carbon material

Fabrication method for hydrogel/macromolecule polymer film muscular tissue support

The invention discloses a fabrication method for a hydrogel/macromolecule polymer film muscular tissue support. The method comprises obtaining a three-dimensional support structure through a layer-upon-layer stacking mode; designing and fabricating a blood vessel network structure mold and a directional flow passage mold according to muscle structural characteristics; fabricating polymer directional film through an electro-spinning technology, fabricating a support single-layer plane structure, stacking other layers of supports on the three-dimensional support structure, and performing covering with the macromolecule polymer film support bonded on the outermost layer to obtain the hydrogel/macromolecule polymer film support. According to the method, the blood vessel network and the directional flow passage are fabricated on hydrogel, directional growth of cells can be achieved through the directional flow passage, nutrition and oxygen supply can be achieved through blood vessel network ...

System and method for forming laser metal manufacturing part with large inclination angle

The invention discloses a system and method for forming laser metal manufacturing a part with a large inclination angle. The method comprises the steps that coaxial four-pipe power conveying nozzles are used for conveying powder, solenoid valves controlled by a controller are arranged on the four powder conveying nozzles respectively, the controller is used for controlling the four powder conveying nozzles to be closed in real time, when the inclination angle of the part is larger than a limit angle, the controller controls the solenoid valves to enable the nozzles in the inclination direction of the part to convey the powder, the other power conveying nozzles are closed, the total amount of conveyed powder is unchanged, the stress of a molten pool is stable, collapsing does not happen easily, the use ratio of the powder is high, and therefore the part with the large inclination angle is machined. The advantages of coaxial powder conveying and lateral powder conveying are combined in the ...

Multi-degree-of-freedom 3D printer of fiber reinforced composite material and printing method thereof

The invention discloses a multi-degree-of-freedom 3D printer of a fiber reinforced composite material and a printing method thereof. The 3D printing can be performed with any angle and any movement locus by making use of the flexibility of a manipulator; and a 3D printing head mounted on the multi-degree-of-freedom 3D printer can perform the 3D printing of a high-strength short fiber reinforced composite material, and can perform the splicing and the weaving of continuous resin-based long fiber to produce a structural body of a continuous fiber reinforced resin-based composite material. The multi-degree-of-freedom 3D printer can precisely control the orientation of reinforced fiber in a composite material part in the 3D printing process, and can realize the quick production of the composite material part with specific mechanical, electric and thermal performances and a complex structure. Meanwhile, a mold customized beforehand and a pretreated fiber prepreg tape are not needed in the process ...

Porous resin mold additive manufacturing method for ceramic slip casting

The invention discloses a porous resin mold additive manufacturing method for ceramic slip casting. The porous resin mold additive manufacturing method for ceramic slip casting comprises the following steps: leading a constructed three-dimensional CAD model into a control system of selective laser sintering equipment, and carrying out additive manufacturing on a resin mold according to the model; and removing a pore-forming agent from the prepared resin mold containing the pore-forming agent so as to obtain a porous-structure resin mold with a runner system for ceramic slip casting. A mixed system formula of a resin material and the pore-forming agent acts as a raw material; a selective laser sintering technology is adopted for manufacturing the porous resin mold for ceramic slip casting with the controllable runner system so as to achieve rapid development and manufacturing of the ceramic slip casting mold; the development cost of the ceramic slip casting mold is reduced; the quality of ...

Method for improving position accuracy of mold core of integrated type ceramic mold

The invention discloses a method for improving the position accuracy of a mold core of an integrated type ceramic mold, and belongs to the field of rapid costing based on stereo-lithography technologies. The method comprises the steps that (1) three-dimensional software is utilized to design a resin mold, and a resin mold prototype with a positioning hole is manufactured by utilizing a stereo-lithography method; (2) a ceramic fiber or a ceramic bar penetrates into the positioning hole according needs; (3) ceramic slurry is poured into the resin mold prototype of turbine blades through a gel casting method to obtain a mold blank; (4) vacuum freeze drying and sintering are carried out on the mold blank to obtain the integrated type ceramic mold of the turbine blades. The position accuracy of the mold core of the integrated type ceramic mold can be effectively improved through the vertically through or non-through mold core, and the method is reasonable in design, is easy and convenient to ...

Customized forming method for gradient porous structure ceramic

The present invention discloses the customized forming process of gradient porous structural ceramic. By means of the combined fast light solidifying and gel molding formation technology, porous ceramic product in spherical pore and micro tube combining structure and complicated profile may be obtained. The technological process of the present invention is simple and has low cost, high precision and high forming efficiency.

Process based on fast shaping for preparing bio-active artificial bone

A process based on fast shaping technique for preparing biological active artificial bone includes such steps as creating CAD 3D internal microstructure and external shape model of bone by CT data, fast shaping the microstructure and the negative mould of its external shape, implantating biological factors or cells, adding Ti fibres for reinforcing mechanism property, filling biological bone material, and preparing artificial substitute bone. Its advantages are high individual adaptibility, high preparing speed good biological compatibilility and high survival rate after implanlation.

Manufacturing method of core for casting engine exhaust manifold

The invention relates to a manufacturing method of a core for casting an engine exhaust manifold, comprising the following steps of: 1, manufacturing a resin assembly mould by a photocuring fast-shaping technique; 2, manufacturing reinforcing iron wires in shape of spatial spiral curve same as the core; 3, filling sands in the mould and putting into the reinforcing iron wires manufactured in the step 2; 4, scraping resin sands along a mould sectional surface by a scraper to make the resin sands protrude a little, and then folding the mould to press tightly; 5, opening the mould to take out the core and carrying out the proper post-treatment on the core after the resin sands are solidified. In the invention, the complex core resin assembly mould manufactured by the fast-shaping method has light weight and good strength, and the surface roughness thereof can also achieve Ra=3.2mum; therefore, in the premise of guaranteeing the quality of the manufactured core, the manufacturing cost and the ...

Tumor type knee joint prosthesis intramedullary needle

The invention discloses a tumor type knee joint prosthesis intramedullary needle which comprises a thighbone intramedullary pin lower segment, a thighbone intramedullary pin upper segment and a self-adaptive part. The thighbone intramedullary pin lower segment and the thighbone intramedullary pin upper segment are inserted into the thighbone marrow cavity during an operation. The self-adaptive part enables the thighbone intramedullary pin lower segment and the thighbone intramedullary pin upper segment to be connected and enables the intramedullary needle to have a certain rotating freedom degree. The self-adaptive part comprises a self-adaptive bearing column at the end of the thighbone intramedullary pin upper segment, an inner pin hole in the self-adaptive bearing column, an outer pin hole in the side wall of the end of the thighbone intramedullary pin lower segment and a self-adaptive bearing cone hole in the end of the thighbone intramedullary pin lower segment, and the self-adaptive ...

Fusible pattern moulding method of silicon carbide with complicated shape

The invention discloses a method for moulding and shaping complex-shaped carborundum. According to the requirements of the actual shape of a carborundum moulded piece, a paraffin female die is designed and processed; then phenolic resin mixture is poured in the die and is solidified for shaping at room temperature. Later, by deep solidification and carbonization, the multi-hole carbon blanker with the shape of the moulded piece is prepared. However, the paraffin die is melted during deep solidification and removed automatically; meanwhile, the melted paraffin is collected for recycling. Finally, siliconizing is carried out on the multi-hole carbon blanker, and the moulded piece of carborundum with the designed shape is prepared, which can be applied to use in the environments of corruption, abrasion, oxidation and high temperature. The method effectively solves the problems of complex shaping and net shaping of carborundum, and is characterized by low cost, one-step shaping, easy industrial ...

Femto-second laser ture three-D micro-nano-processing center

Method for controlling sintering creep of integral type hollow turbine blade ceramic casting mould cores

The invention discloses a method for controlling sintering creep of integral type hollow turbine blade ceramic casting mould cores. The method includes the following step that an initial ceramic casting mould die is drawn with the bottom face of a turbine blade as a reference plane; an initial ceramic casting mould is prepared according to the initial ceramic casting mould die; the orientation relative to the horizontal plane of the initial ceramic casting mould in a hearth serves as the initial casting mould orientation; a U-shaped mould core of the whole set of mould cores under the initial casting mould orientation is selected as the optimized object; the gravity center of the U-shaped mould core and face centers of two end faces serve as end points to form a spatial triangle; the plane where the spatial triangle is located is recorded as a gravity center face, the gravity center face is made to be perpendicular to the horizontal plane through changing the orientation of the initial ...

Testing method for improving metal laser direct-forming accuracy

The invention discloses a testing method for improving the metal laser direct-forming accuracy, which respectively adopts persistent wave, sine wave and square wave loading to perform the laser single-pass metal forming test under the condition of same average output power to obtain the change law of the single-pass metal forming section under different wave forms. The stacking forming of thin-wall parts can be realized by utilizing the sine wave and the square wave and setting reasonable parameters. In order to obtain a same laser metal direct-forming part, the power output of the square wave is reduced by 20-30 percent compared with the persistent wave, the square wave can not only reduce the heat input and the heat accumulation, but also have less heat affected zone during the forming so as to be beneficial to reducing the characteristic size of the part and improving the forming accuracy of the metal direct-forming part. The method has the significance with respect to the part forming ...

Device for controlling gel content of in-situ solidifying fiber placement machine

The invention discloses a device for controlling the gel content of an in-situ solidification fiber placement machine. The device comprises a resin-supplying control mechanism, a gel-extruding mechanism, a tension control mechanism and a flow control mechanism, wherein, the resin-supplying control mechanism is arranged above the gel-extruding mechanism; the tension control mechanism is arranged at the front end of the gel-extruding mechanism and used for adjusting the system tension of the device; the flow control mechanism is arranged at the bottom of the resin-supplying control mechanism and used for controlling the flow of resin pouring onto the glass fiber; and the flow control mechanism is used for pouring the resin onto the glass fiber, and the gel-extruding mechanism is used for extruding the resin on the glass fiber into the glass fiber. The invention has the advantages of simple structure, convenient use and low cost, and the invention can realize the accurate control over the ...

Magnetic stirring and liquid level regulation device for light-cured rapid-forming ceramic slurry

The invention discloses a magnetic stirring and liquid level control device for light-cured rapid-forming ceramic slurry, which comprises a rectangular slurry tank, a screen plate and a scraping plate, wherein the screen plate and the scraping plate are arranged in the slurry tank; a floating block which can move vertically up and down is also arranged in the slurry tank; a magnetic stirrer is arranged below the slurry tank; a round blind slot for arranging the rotor of the magnetic stirrer is arranged on the bottom of the inner tank of the slurry tank; the upper side of one end of the slurry tank extends outwards to form a scraping plate cavity, and the upper side part of the other end of the slurry tank extends outwards to form a liquid level detecting cavity; the liquid level detecting device is arranged in the liquid level detecting cavity; and both the slurry tank and the screen plate are made of magnetic flux material. The device of the invention aims at the problem that in the process ...

Laser metal direct forming method of liquid argon jet cooling directional solidification

The invention discloses a laser metal direct forming method of liquid argon jet cooling directional solidification. The method is characterized in that: positive temperature gradient is kept all the time along the Z-axis direction in a molten pool in the subsequent forming process by adopting a method of liquid argon jet and quick cooling performed below the formed layer once a certain layer number is stacked. Meanwhile, the liquid argon for cooling is converted into argon gas and can also be used for reducing oxygen content in an argon protection box. Therefore, the columnar crystal tissue in a formed piece is continuously grown from a substrate along the Z-axis forming direction, and the formed piece obtains complete directional solidification columnar crystal tissue.

Natural color ceramic false tooth and photocuring forming method thereof

The invention discloses a natural color ceramic false tooth and a photocuring forming method thereof, and belongs to the technical field of photocuring forming. According to the method disclosed by the invention, different types of natural-color ceramic denture slurry are adopted, a multi-material surface exposure printer is used, and different ceramic slurry is adopted for printing according to the denture height, so that a natural-color ceramic denture biscuit is obtained; carrying out pyrolysis on the obtained ceramic false tooth biscuit so as to carbonize organic matters in the ceramic false tooth biscuit; and sintering the pyrolyzed natural color ceramic false tooth to obtain the formed natural color ceramic false tooth. By adopting a multi-material surface exposure forming technology, different areas on one false tooth can have different colors, so that the color of the false tooth is consistent with that of a natural tooth; according to the zirconia ceramic false tooth with multiple ...

Manufacturing method of complex-structured intelligent material device based on rapid forming technique

The invention relates to a manufacturing method of a complex-structured intelligent material device based on a rapid forming technique. The manufacturing method comprises the following steps: determining the utilized rapid forming technique according to one or multiple requirements including the physicochemical properties and states of a forming raw material and the precision of the complex-structured intelligent material device; establishing a three-dimensional model of the complex-structured intelligent material device, carrying out discretization on the surface of the three-dimensional model of the complex-structured intelligent material device to generate a three-dimensional digital model file of the three-dimensional model of the complex-structured intelligent material device, carrying out support adding, layered model discretization and processing route generation on the three-dimensional digital model file to guide out a processing file capable of being identified by rapid forming ...

Liver tissue engineering scaffold for cell composite culture and preparation method thereof

The invention relates to a liver tissue engineering scaffold for cell composite culture and a preparation method thereof. The liver tissue engineering scaffold is formed by overlapping and wrapping a membrane scaffold with a flow channel structure and a micron porous scaffold with a cell culture structure. The preparation method of the liver tissue engineering scaffold comprises the steps of: first, designing a digital model, preparing a negative model of the soft mold of the membrane scaffold and a negative model of the soft mold of the porous scaffold, then respectively preparing the membrane scaffold and the porous scaffold and finally overlapping and wrapping to prepare the liver tissue engineering scaffold, wherein the liver tissue engineering scaffold internally has the micron porous scaffold with the cell culture structure and the membrane scaffold with the flow channel structure, the cell culture structure is beneficial for the growth of cells, as the optimally designed flow channel ...

Powder 3D printing method based on instant inorganic binder

The invention discloses a powder 3D printing method based on instant inorganic binder. The powder 3D printing method comprises the following steps: firstly, using deionized water as a binder for a 3D printer, and adding a co-volatile agent, a coloring agent and a modifying agent to form a mixed solution as a binder for powder 3D printing; secondly, using instant sodium silicate as a solid binder, mixing the solid binder with 3D printer raw material powder, and then adding flux to form mixed powder as a material for the powder 3D printing; finally, performing the powder 3D printing by using the prepared binder and the mixed powder, wherein the binder prepared from water and the instant sodium silicate are used as the binder for a powder 3D printing process; as for a powder 3D printing nozzle, a solution with the viscosity close to water is only filled, and the solution is stable in performance, easier to store, unlikely to block the nozzle and free of corrosive effect on the nozzle. By the ...

Method for controlling medium-temperature strength of gel-cast ceramic parts

The invention discloses a method for controlling the medium-temperature strength of gel-cast ceramic parts. The method comprises the steps of firstly, adding organic monomers, a cross-linking agent and a dispersant sodium polyacrylate into diluted silica sol, so as to obtain a premix, then, adding polysiloxane, ceramic powder and polyimide, and carrying out ball milling, so as to obtain ceramic slurry, carrying out in-situ curing, then, carrying out freeze drying, and carrying out degreased pre-sintering, impregnation aftertreatment and final-sintering, thereby obtaining the ceramic parts. According to the method, polyimide has adhesion property due to the high-temperature resistance of polyimide, a reticular structure is formed due to the low-temperature cross-linking of polysiloxane, a role in adhering ceramic granules is played, after freeze drying, silica sol is dehydrated, so as to form a silicon-oxygen bond three-dimensional reticular structure, and the medium-temperature strength ...

Device for regulating light intensity uniformity of in-situ cured fiber placement head ultraviolet LED lamp

The invention discloses a device for regulating light intensity uniformity of an in-situ cured fiber placement head ultraviolet LED lamp, comprising a connecting mechanism, rear regulating mechanisms, front regulating mechanisms and LED lamps; the connecting mechanism is fixed on a placement head system; the back side face of the connecting mechanism is provided with a group of rear regulating mechanisms, the lower end of each rear regulating mechanism is provided with an LED lamp, the rear regulating mechanisms are used for controlling the height and the irradiation angle of the LED lamps thereon, and the LED lamps at the lower end of the rear regulating mechanism form a rear LED lamp group; a group of front regulating mechanisms are arranged at the front side face of the connecting mechanism, the lower end of each front regulating mechanism is provided with an LED lamp, the front regulating mechanisms are used for controlling the height and the irradiation angle of the LED lamps thereon ...

Aeroplane buffet air tunnel model integration design and manufacturing method

The invention relates to an integrated design and manufacture method of a full resin airplane low-velocity flutter wind tunnel model based on photocuring rapid prototyping. The method first conducts the integrated design of the flutter model according to the actual structure of an airplane, the requirement of a wind tunnel experiment and the parameters of photocuring resin material and based on the photocuring resin material, and makes the full resin flutter model in an integrated way on the basis of the optimization of the photocuring rapid process. The method proposes a new design and manufacture concept of the flutter model of low modulus material, gets rid of unnecessary assembly links by the use of the advantages of accuracy, quickness and low cost of the photocuring rapid prototyping technology, the uniformity of the model material, the low modulus of the resin material and isotropy characteristic, and designs and manufactures the full resin flutter wind tunnel model meeting thefull ...

Vacuum freezing and drying process for ceramic cast blank

The invention relates to a vacuum freeze drying process for a ceramic mould body. The vacuum freeze drying process comprises the steps of putting a water based ceramic mould body moulded by using the wet method in a vacuum freeze drier for prefreezing; after the water in the body is completely crystallized; the vacuum freeze drier is vacuumized while the temperature of the material is controlled so that the water is directly sublimed into water vapor and is pumped away; after the material is completely dry, the ceramic mould body with small drying shrinkage without crack. By applying the vacuum freeze drier in the preparation of the ceramic mould body, the shrinkage of the ceramic mould at the dry stage is significantly reduced; the dimensional accuracy is improved; the probability of distortion and crack is reduced. The vacuum freeze drying process is in particular applicable for drying ceramic mould bodies in complicated shapes.

Photocuring resin for investment casting in laser fast molding

The invention discloses a photocuring resin for investment casting in laser fast molding. The resin comprises the following materials in percentage by mass: 30 to 55 percent of unsaturated polyester, 20 to 35 percent of epoxy resin, 20 to 40 percent of active diluent and 1 to 6 percent of light initiator. A preparation process for the resin comprises the following steps of: adding the light initiator into the active diluent, dissolving in a water bath of 40 to 60 DEG C until the light initiator is transparent, adding the unsaturated polyester and the epoxy resin, and stirring and mixing for 1 to 2 hours. The resin has low viscosity, a mold shell does not crack during roasting, the thermogravimetric curve is flat in a roasting process, the gas evolution is uniform and the carbon residue is low.

Device and method for carrying out online measurement to height of a molten pool by utilizing optical method

The invention discloses a device and a method for carrying out online measurement to the height of a molten pool by utilizing an optical method. The device comprises an imaging element, a shading sheet, a light path amplification device and a photosensitive sensor, wherein the imaging element is placed above the molten pool, the shading sheet is placed in front of the imaging element, the light path amplification device is placed behind the imaging element, and the photosensitive sensor is used for receiving the reflected light of the light path amplification device; the photosensitive sensor is in signal connection with a computer; and the computer is in signal connection with a light generating device of a spray nozzle and a power conveying device to form the closed loop control to the height of the molten pool. By the adoption of the device and the method, the height of the molten pool can be measured through a light signal of the molten pool during the forming process; and an output ...

High-safety integrated fuze structure with bionic design

The invention discloses a bionically designed high-safety integrated fuze structure, and solves the problems of large assembly error, long production period and high cost caused by manual assembly of internal parts in an existing fuze. The device comprises a shell and an internal structure, the internal structure comprises an upper plate, a lower plate, a supporting table, a firing pin and a detonator base, the upper plate and the lower plate are connected through a connecting column, the connecting column is integrally bent, the diameter of the connecting column gradually decreases from the middle to the two ends, the two ends of the connecting column are connected with the upper plate and the lower plate respectively, and the outer edge of the bottom of the supporting table is connected with the inner wall of the shell. The upper part of the detonator seat is connected with the interior of the cavity of the supporting table, the lower part of the detonator seat is connected with the inner ...

Photocuring rapid forming method adopting variable light spot process

The invention relates to a photocuring rapid forming method adopting a variable light spot process, which comprises the following steps of: firstly, drawing a three-dimensional entity graph in a computer to obtain information of each section layer of a part entity; then controlling a mesh plate to lift and descend in a resin groove, so that a layer of resin is formed on the surface of the mesh plate; sequentially supporting a part, filling the part entity and scanning a profile of the part entity; descending the mesh plate; forming a new liquid resin layer on the surface of a cured layer; controlling a scanning vibration mirror to complete scanning a two-dimensional section graph of the part entity by an internal command so as to form a new cured layer; adhering the new cured layer to thecured layer; repeatedly scanning and curing until a model is totally formed; and finally lifting the mesh plate out of the resin groove, taking out a formed part and cleaning liquid resin on the surface ...

Method for quickly and precisely casting complex parts

The invention provides a quick precision casting method for complex parts. The method uses a photosensitivity rapid prototyping technique to prepare a resin part prototype, a pouring system resin prototype and a resin process die shell which are then combined together to form a die; the method uses a gel-casting processing technique to pour ceramic slurries with high solid-phase and low viscosity into the die cavity so as to form a ceramic casting blank by quick in-situ solidification; the ceramic casting blank is dried and the resin prototype is burned and sintered to obtain the ceramic casting which contains the downsprue; finally, high-temperature metal liquid is poured into the ceramic casting; after being cooled, the ceramic casting is mechanically destroyed to obtain the precision casting. The method requires no manufacturing of metal dies, uses the ceramic casting prototyping which has high efficiency, good precision and short production period, and is especially suitable for the ...

自固定式人工椎体及其安装工具

The present invention relates to a self-fixed artificial vertebral body and its mounting tool. It is formed from an intermediate cover, two side covers and two end cover terminal laminas which are assembled together. Its whole structure is up-down symmetrical, its interior is hollow, its length is adjustable, and its middle portion can be bent at a certain angle so as to ensure spinal physiological curve. Its mounting tool includer manual ring drill, curved wrench and sighting device. Said invention also provides its mounting method and steps.

Method for controlling mixed crystal defects by locally thickening monocrystal blade shell on basis of simulation

The invention discloses a method for controlling mixed crystal defects by locally thickening monocrystal blade shell on the basis of simulation and belongs to the technical field of materials processing. The technical scheme includes that the method includes acquiring precise physical property parameters for simulation by setting up a computer-experimental analysis system on the basis of numerical simulation; searching local supercooling isolation area of the temperature during solidification by analyzing the temperature field distribution of a casting blade during directional solidification; gradually thickening the shell near the local supercooling isolation area of the temperature of the casting blade, preserving heat of the fast-radiation position of the casting blade to obtain uniform and horizontal directional temperature distribution; producing the modified shell by the shell mold core integrated manufacturing technology to obtain a mononcrystal blade shell having precise structural ...

Adjustable laser coaxial powder feeding nozzle

The invention discloses an adjustable coaxial laser nozzle for feeding powder, comprising a laser head, a protection lens, a water-cooling sleeve for the protection lens and a column laser cavity arranged at the upper part, a coaxial conical laser cavity which is formed by the inner layer of a laser sleeve in the middle part; wherein, a powder cavity, a secondary external protective cavity and anexternal water-cooling cavity are arranged on the lower part of the external part of the laser sleeve; the powder cavity is formed between the laser sleeve and a power cavity sleeve screwed together;the secondary external protective cavity is formed between the powder cavity and a protective air casing screwed together; the powder cavity and the protective air casing are screwed together and adjustable between 1mm to 3mm; 4 to 6 power transmitting pipes and 4 to 6 air tubes are respectively positioned around the top parts of the cones of the powder cavity and the protective air cavity. The adjustable ...

Promoting bone reconstruction custom flexible titanium lower jawbone substitute and its preparation method

The present invention relates to a customized flexible titanium mandible substitute capable of promoting reconstruction of bone and its preparation method. It is characterized by that said invention adopts counterclaim technique, CAD technique and quick-forming technique, uses CT film of patient as data source and adopts designing process of 'CT image/curved face/physical model' so as to make individual customized design of outer form and structure of mandible substitute, and utilizes the change of mandible titanium supporting frame structure to raise the flexibility of titanium mandible substitute. Said invention can obviously raise operation effect and can effectively shorten operation time.

Manufacturing method of complicated structure ceramic part of gas turbine-oriented hot-end component

The invention discloses a manufacturing method of a complicated structure ceramic part of a gas turbine-oriented hot-end component. The method comprises the following steps: laminating phenolic resin on ceramic powder surface; adding a binder, and carrying out assisted forming; adding a proper amount of staple fibers to toughen; and stacking and molding the parts by using a material increase manufacturing technology. According to the method disclosed by the invention, siliconing or dipping treatment is carried out on the ceramic part; internal gaps of the part are filled by a chemical gas phase permeability technology; the compactness is improved, and thus, the manufacturing method is suitable for manufacturing of complicated structure part of the gas turbine; the manufacturing efficiency and the success rate can be greatly improved; and the method has high practical value.

Test method for studying on self-healing capability of laser metal formation

The invention discloses a test method for studying on the self-healing capability of laser metal formation. The test method comprises the following steps: utilizing a laser metal to directly form multiple groups of single-channel thin-wall test samples on a substrate with bulges by utilizing an orthogonal test method under an open-loop control condition; analyzing the influence of technical parameters on the sizes of samples; and seeking for the main influence factors so as to establish a reasonable forming process, thereby promoting the forming precision. The test method for studying on the self-healing capability of laser metal formation has the advantages that the test method is used for studying on the influence of different technical parameters on the self-healing capability of the laser metal formation, establishing an optimized technical parameter combination and quantitatively analyzing the feature self-healing capability ranges of different materials in the laser metal formation ...

以数控铣床为母机的三维反求测量装置

... 本发明公开了一种以数控铣床为母机的三维反求测量装置，该装置采用悬架方式与数控铣床进行快速的定位与连接，构成一个三维反求测量系统，可对具有切屑加工性能的任何复杂零件进行内外轮廓的三维精密测量。该装置由悬架连接机构、计算机控制系统、数码拍摄测量机构和排刷去屑机构组成。该装置与数控机床定位连接后，数控铣床实现测量过程中的三个坐标轴直线运动，数码拍摄测量机构实现逐层图象的获取，排刷去屑机构实现层截面的清洁，计算机控制系统实现与数控铣床的信号连接并控制数码拍摄测量机构进行自动拍摄和数据的传输。该装置可与不同类型数控铣床相连接构成三维反求测量系统，将极大地拓展传统数控装备的作用。 ...

Method and device for light curring high-rate forming of surface entity

The invention relates to a method and a device for light curring high-rate forming of surface entity, wherein the method for light curring high-rate forming comprises the following steps: drawing a three-dimensional entity figure in a computer primarily, performing the stratified processing to the three-dimensional entity through a software, obtaining information of each section layer of the entity, converting the information of the section layers of the entity in the computer into corresponding optical images, irradiating the optical images on processing layers of photosensitive resin layer by layer by utilizing an LED light source set controlled by a control circuit, and completing the light curring forming of a light curring high-rate formed surface entity. The device comprises the LED light source set, an optical fiber bundle, a focus fiber lens set, an imaging lens, and the like. The invention has the advantages of high entity forming efficiency, good forming quality, simple structure ...

Method for orientated growth of superfine columnar crystal by adopting laser direct forming technology

The invention discloses a method for orientated growth of a superfine columnar crystalby adopting a laser direct forming technology. The method is characterized in that a directional solidification substrate heating mode is adopted; meanwhile, the laser direct forming is controlled for the orientated growth of the superfine columnar crystal by adopting low-power and small single-layer lifting capacity in the process and the problem that the orientated growth of part of columnar crystal is discontinuous or turns for growing existing in a laser direct forming directional solidification technology is solved; by adopting the substrate heating mode, the temperature gradient in a laser molten pool is properly reduced, the orientated growth interval of the columnar crystal is still controlled to keep great-enough temperature gradient and the supercooling degree required by growing the columnar crystal is met; in addition, due to the utilization of the substrate heating mode, the temperature of ...

个体化人工半关节面替代物制备方法及其人工半关节替代物

A substitute of personalized artificial semi-facies articularis is composed of semi-articulation body, bioconnector, connecting pile for intramedullary needle, and locator for operation. An artificial articulation is prepared through CT scanning to articulation of patient, image processing, 3D reconfigurating by software, designing semi-articulation body, designing said bioconnector, connecting pile and locating die, fast shaping to obtain prototype, precise fusion casting, and assembling.

Integrated manufacturing method of novel composite ligament-bone scaffold

The invention discloses an integrated manufacturing method of a novel composite ligament-bone scaffold. After a ligament scaffold, a bone scaffold and a fastening nail silicon mold are manufactured, the ligament scaffold and the bone scaffold are connected, a molten fastening nail material is poured into the fastening nail silicon mold, the bone scaffold is pressed into the fastening nail silicon mold, an auxiliary implantation device is placed in a fastening nail material molten liquid which is not solidified and is pulled out after being solidified, and then the ligament-bone scaffold is acquired. The ligament-bone scaffold and an autogenous bone channel are initially fixed through fastening nails, at the later period, an autogenous bone grows into a bone scaffold hole and the bone scaffold is degraded to grow bone tissue, stable physiological fixation is achieved, and the auxiliary implanting device guides the ligament-bone scaffold into the bone channel. The whole ligament-bone scaffold ...

In-situ consolidation fibre laying method and device for producing resin-based compound material component

The invention discloses a method and a device for manufacturing resin-based composite material component by using fiber placement technology. By adopting fiber placement technology, the method and thedevice can place a fiber placement layer on the surface of a core die by a compaction mechanism to solve the problem of conventional winding equipment that is incapable of manufacturing surface component with negative curvature and non-gyrorotor component. Meanwhile, in-situ instantaneous stratified radiation curing is adopted to eliminate the influence of a tensile force in the fiber placement layer on the shape of the product and to solve the problems and disadvantages of large thermal deformation and easy generation of cracks due to autoclave curing treatment, the restriction of the autoclave volume on the component size, high production cost, and long production period. Based on industrial robot as the manufacture body, the device can improve the problems of prior placement equipmentsuch ...

Powder 3D (Three Dimensional) printing method using photosensitive sol binding agent

The invention provides a powder 3D (Three Dimensional) printing method using a photosensitive sol binding agent. The photosensitive sol binding agent adopts sol which is silicon sol, yttrium sol, nano carbon sol, nano aluminum sol or nano titanium sol, and contains an ultraviolet light initiator and a cross-linking agent; a cross-linking reaction happens with an ultraviolet light source so that the binding agent is cured rapidly and is used for binding powder; the photosensitive binding agent can be subjected to a reaction when meeting ultraviolet light so that the photosensitive binding agent is not cured and bound in a jet printing head and the jet printing head is unlikely to block; meanwhile, the sol is used as a main component to carry out powder binding; in a sintering process of post-treatment, a lot of chemical bonds similar to an SiO-bond, a C-O bond and the like can be generated in a part and are linked with one another, so that the strength of the part is improved greatly and ...

High-accuracy biological 3D (three-dimensional) printing method

Disclosed is a high-accuracy biological 3D (three-dimensional) printing method. According to the method, firstly, procedures for controlling a platform to move are compiled on a computer according to cell patterns wanting to be printed or three-dimensional cell gel structures, secondly, mixed solution of cells/growth factors/biological materials for 3D printing is selected, the cells/the growth factors/the biological materials are sucked into a syringe with a metal sprayer in a mixed manner, the metal sprayer is connected with a positive electrode of direct-current high-voltage power supply, a receiving plate is fixed on the movable platform below the metal sprayer and connected with the ground, the mixed solution forms material jet streams by the aid of electrostatic force, and the movable procedures on the movable platform are started, so that the material jet streams form the predesigned patterns or structures on the receiving plate. According to a cross linking mode, a treatment mode ...

Direct inkwriting device and method for a bias-controllable continuous fiber reinforced composite material

A direct ink writing device and method for a bias-controllable continuous fiber reinforced composite material are provided. The device includes a cartridge fixed by an external device, a bottom of the cartridge is connected to a nozzle. A piston is arranged in the cartridge, the piston is provided with a chamber for containing sealing liquid and a capillary for a continuous fiber to pass through. The centers of an inner circumference and an outer circumference of the cartridge do not coincide with each other. The bias position of the continuous fiber in the composite material is achieved using the piston, and each filament of composite material is printed in steps of rotation, extrusion, revolution and curing. A structure produced according to the disclosure has high mechanical properties and outstanding intelligent properties, and the bias position of the continuous fiber material in the structure can be accurately adjusted.

Micro-nano 3d printing device with multi-nozzles jet deposition driven by electric field of single flat plate electrode

A micro-nano 3D printing device with multi-nozzles jet deposition driven by electric field of single flat plate electrode, including: a printing head module group, printing nozzle module group of any material, printing substrate of any material, flat plate electrode, printing platform, signal generator, high-voltage power supply, feeding module group, precision back pressure control module group, XYZ three-axis precision motion platform, positive pressure air circuit system, observation and positioning module, UV curing module, laser rangefinder, base, connection frame, first adjustable bracket, second adjustable bracket, and a third adjustable bracket; the device realizes high throughput micro-nano 3D printing of jet deposition, including different configuration implementation schemes like multi-materials with multi-nozzles, single material with multi-nozzles and single material with multi-nozzles array, improves the printing efficiency, and realizes multi-materials macro/micro/nano printing, high-aspect-ratio microstructure efficient manufacturing, simultaneous printing of heterogeneous materials, efficient manufacturing of large area micro-nano array structure and parallel manufacturing of 3D printing.