232results about How to "Realize forming" patented technology

This invention relates to an electromagnetic progressive shaping method for plate moving coils and a device, in which, said device includes a computer control system, an electromagnetic force generation system and a three-shaft digital control shaping system including a plate clamping elevating device, a supporting model frame and an electromagnetic shaping clamping rod, in which, the computer controls the coil to move downward along the contour of a model profile from the top according to the contour data of the model profile and the plate is formed partly relying on the magnetic force of coil till to the bottom of the model and finish the entire process.

The present invention addresses the problem of providing: a high-strength hot-rolled steel sheet which has excellent strength and excellent processability (in particular, bending processability) at the same time; and a method for producing the high-strength hot-rolled steel sheet. In order to solve the above-mentioned problem, the present invention is characterized by: having a specific composition; having an area ratio of a ferrite phase of 95% or more; having an average crystal grain diameter of the ferrite phase of 8 mum or less; having a structure wherein the average particle diameter of carbides within the crystal grains of the ferrite phase is less than 10 nm; and having a tensile strength of 980 MPa or more.

The invention discloses a powder conveying and paving mechanism for enhanced material manufacturing equipment. The powder conveying and paving mechanism comprises a powder conveying mechanism, a powder paving mechanism and a transmission mechanism, wherein a powder conveying box body performs a side-to-side movement on a forming workbench along a guide rail mounted on the side wall of a forming cavity under the driving of a motor; by mounting scraper plates on the two sides of a lower powder opening, the powder is paved left and right when the powder is conveyed; by filling different powder into a hopper, the conveying quantity of the different powder is controlled accurately by controlling the displacement speed of a piston, so that the proportioning of the different material powder can be adjusted; by utilizing the high-speed rotation of a stirrer, the different powder can be mixed evenly; and the proportioning of the powder can be changed for multiple times during the one-step forming process, so that a gradient material component formed by compounding the multiple materials arbitrarily can be prepared. According to the powder conveying and paving mechanism, the volume of the forming cavity is reduced greatly, so that the powder consumption is saved. In addition, the powder conveying and paving mechanism is simple to operate and convenient to adjust.

The present invention pertains to a process for manufacturing a hot-rolled steel sheet which comprises: heating a steel raw material that contains, in mass%, 0.055 to 0.15% of C, at most 0.2% of Si, at most 1.3% of Mn, at most 0.03% of P, at most 0.007% of S, at most 0.1% of Al, at most 0.01% of N and 0.14 to 0.30% of Ti so as to satisfy the relationship 1.0 <= ([C] / 12) / ([Ti*] / 48) (wherein [Ti*] = [Ti]-3.4[N]-1.5[S]) to a temperature (T) ( DEG C) which is equal to or higher than 1150 DEG C and which satisfies the relationship [Ti*] < 10{-7000 / (T+273)+2.75 / [C]; keeping the steel raw material in a temperature range down to 1150 DEG C for at least 15 minutes; subjecting the resulting steel raw material to hot rolling wherein the total rolling reduction in a temperature range up to 980 DEG C is 40% or less and the finish rolling temperature is 880 DEG C or higher; cooling the hot-rolled steel sheet at a cooling rate of 40 to 200 DEG C / s within three seconds after the completion of the finish rolling; and winding up the cooled steel sheet in a temperature range of 500 to 680 DEG C.

A cut deal laser inherent stress composite peen forming features in the clipper using robot, using carbon dioxide to realize the basic formation, profile measuring feedback system controlling the deformation quantity, left stress meter measuring the surface stress of the board, optical scanning the pre formation, realizing board through model analog software, getting optimized process parameter instructing laser consecutive peen formation, using neodymium glass laser providing short pulse strong laser light, laser impact wave as the force source of precise forming, using the profile feedback device and on line measuring board surface stress left stress to control the deformation quantity to realize precision forming with complex shapes.

The invention relates to a storage tank hemispherical shell forming method. Aiming at the forming production of an aluminum alloy hemispherical shell capable of being strengthened through heat treatment, an aluminum alloy flat plate is hot spun directly and wholly to form a pre-formed blank, and is quenched to spin at a room temperature to form a final-formed blank; the diameter of the final-formed core mold is smaller than the diameter of the pre-formed blank by 2-4 mm; through setting a reasonable spinning gap value, the deformation is about 5-10%; the ageing treatment is performed after the spinning; a final state can reach a 787 state; and the yield strength and the tensile strength of a shell are improved by 10-20% compared with a T62 state of a traditional process (direct quenching and ageing after spinning). Two sets of molds with different diameters are only needed; spun workpieces are excellent in mold bonding; a formed hemispherical shell is high in strength; the optimal performance state of such thermal-treated strengthened aluminum alloys as 2219 exerts; and the advantages of the thermal-treated strengthened aluminum alloys are fully embodied compared with general aluminum alloys incapable of being strengthened through heat treatment.

The invention relates to steel plate warm formed parts with high efficiency, low energy consumption and high quality and a production method thereof, belonging to the technical field of part forming. The steel plate for producing parts comprises the following components in percent by weight: 0.02-0.45% of C, 3.50-9.0% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, and the balance of Fe and unavoidable impurities. On the basis of these components, one or more of the following components (in percent by weight) are additionally added: 0.1-3.0% of Ni, 0.2-3.0% of Cr, 0.1-0.8% of Mo, 0.3-2.3% of Si, 0.5-2.0% of Cu, 0.0005-0.0050 of B, 0.02-0.30% of Nb, 0.002-0.250% of [N], 0.05-0.25% of Ti, 0.02-0.25% of V, 0.015-3.0% of Al, 0.002-0.005% of RE, and 0.005-0.03% of Ca. The production method comprises the following steps: steel plate heating, steel plate transferring, steel plate precooling, part forming, part cooling, and part temperature control treatment. The production method provided by the invention has the advantages of low cost and high efficiency, and improves the forming rate and final mechanical properties of workpieces.

The invention provides a method for manufacturing a superlarge spherical seal head, which comprises the steps of: providing a first group of steel plates to form a first ring part of a spherical seal head, wherein the closed end of the spherical seal head is formed by the first ring part; providing at least one group of steel plates to form at least one middle ring part of the spherical seal head; and providing the last group of steel plates to form an outmost ring part of the spherical seal head, wherein the open end of the spherical seal head is formed by the outmost ring part. Corresponding steel plates of adjacent groups and adjacent steel plates of each group of steel plates are finally interconnected through welding. A sectional forming method is applied to the spherical seal head, the seal head is formed step by step through deformation of each area, and larger deformation is dispersed and localized, therefore, the deformation of each area can be even to effectively avoid defects, such as crinkles and the like.

The invention relates to a portable double-coil electromagnetic riveting device which comprises a rear gun barrel and a front gun barrel. The front gun barrel slides relative to the rear gun barrel in a reciprocating mode through a damping system. A primary coil is fixedly connected into the front end of the front gun barrel. A sliding secondary coil is arranged at the front end of the front gun barrel in a sleeving mode and located beside the primary coil. The front end face of the primary coil is fixedly connected with a riveting die through an amplifier. The rear end face of the primary coil is fixedly connected with an intermediate spindle penetrating through the primary coil. The intermediate spindle slides relative to the rear gun barrel and the front gun barrel in a reciprocating mode through an elastic limit mechanism and a guide mechanism. The primary coil and the secondary coil are electrically connected. According to the double-coil self-excitation principle, currents with uniform wave forms are loaded to the coils at the same time, so that the riveting energy is increased, and the energy utilization rate is improved. Through a buffering spring, recoil energy is stored in the elastic potential energy of the buffering spring, and a one-way damper consumes energy to reduce vibration sense in the rebounding process.

The invention relates to an ion chromatography-binode electrochemical hydride generation atomic fluorescence on-line combined system, which comprises a liquid chromatography pump, an admission valve, an ion chromatographic column, a three-way connecting device, a peristaltic pump, a binode electrochemical hydride generator, a four-way connecting device, a gas-liquid separator and an atomic fluorescence photometer. Element compounds of different forms in a sample are separated on the ion chromatographic column, the separated components are reduced to gaseous hydride on the binode electrochemical hydride generator, the gaseous hydride after undergoing gas liquid separation through the gas-liquid separator is led into the atomic fluorescence photometer by carrier gas for detection, and signals are recorded and processed by a self-developed work station. The ion chromatography-binode electrochemical hydride generation atomic fluorescence on-line combined system successfully realizes effectively converting the element compounds of different forms separated by the ion chromatographic column into hydride on line, and introduces an atomic fluorescence detection system on line, thereby establishing a simple, quick, sensitive, accurate, economical and reliable new technologic platform for element form analysis.

The invention relates to a spinning forming core mold device and a method of multi-functional complex longitudinal and transverse inner rib cylindrical components. Each combined core mold comprises anactive core mold and a passive core mold; and the transverse core molds are circular rings with bosses on the inner sides. The combined core molds acts independently, so that the combined core moldscan be formed without rib barrel-shaped components; the combined core molds and the transverse core molds are matched, and cylindrical components with transverse inner ribs can be formed; the combinedcore molds and the longitudinal core molds are matched, and cylindrical components with longitudinal inner ribs can be formed; and the combined core mold and the transverse core mold, the longitudinal core molds and the longitudinal core molds are matched, and cylindrical components with complex longitudinal and horizontal inner ribs can be formed. According to the spinning forming core mold device, the forming of the ribbed components and non-ribbed components with different types is realized; the transverse core molds are adjusted., the thicknesses of the longitudinal core molds are equal to the thicknesses of the longitudinal core molds, and the forming of the cylindrical components with different ribs and high longitudinal and transverse inner ribs is realized; and the device can effectively solve the problems that the core molds of the cylindrical spinning forming components with the longitudinal and transverse ribs are difficult to machine and demold, and has the characteristicsof being easy to machine and assemble, convenient to detach, multifunctional and the like.

The object of the present invention is to provide a ball spinning forming tooling device and its reverse ball spinning forming method. The ball spinning forming tooling device includes a spinning head, a mandrel and a limit ring. The spinning head includes a threaded support tube, an outer support Ring, conical die ring, balls, threaded support tube and conical die ring are installed in the outer support ring, one end of the threaded support tube is located in the conical die ring, the balls are located in the conical die ring, and are evenly distributed around the conical surface of the conical die ring , and in contact with the threaded support pipe, the core mold includes a mandrel and a discharge ring, the discharge ring is sleeved on the mandrel, and the limit ring is sleeved on one end of the mandrel. The reverse ball spinning forming method is completed through three steps: preparation stage, spinning stage and unloading stage. The invention can manufacture high-strength, high-precision thin-walled longitudinal internal rib cylindrical parts. The radial position of the tooling ball can be precisely controlled by adjusting the threaded support tube, which greatly improves the forming accuracy.

The invention discloses a spinning mechanism and method for forming a corrugated pipe. A core shaft is sleeved with a core die which is sleeved with a blank, and the blank is fixed through four clamping blocks located at one end of the core shaft (1). The core die comprises a straight-wall core die body and a corrugated core die body, and in the process of forming the corrugated pipe, different core die bodies are selected according to different processes. Through three times of spinning, the size precision of the finally formed part is guaranteed, integrated plastic forming of the corrugated pipe in the whole process is achieved, in this way, plastic work hardening occurs, the obtained corrugated pipe is free of splicing, and the mechanical property of the workpiece is improved.

The invention relates to a method for forming a three-dimensional curve surface by using a discrete displacement loading mode, and belongs to the field of metal plastic processing. Uneven deformation is a main reason of various defects in formation of the three-dimensional curve surface. The formation process is controlled by adopting the discrete displacement loading mode; displacement loads are exerted to a series of discrete points at two ends of a panel by virtue of a loading control unit; the size and direction of each loading point displacement load change in real time. The invention provides a method for determining horizontal direction displacement and vertical direction displacement of each discrete loading point according to the target curve surface of a formed part. The homogenization of material deformation in the stretch forming process can be achieved by virtue of real-time control on each discrete point displacement; defects are avoided; formation of curve spare parts with large deformation is achieved; the laminating process of the panel can be improved; the process oddments are saved.

The invention relates to the field of machine manufacturing, in particular to a dynamic self-adaptation control device for laser shot blasting forming precision of a metal plate clamped by a robot. The dynamic self-adaptation control device is mainly composed of a laser device 1, a light guide and reflector path adjusting system 2, an impact laser head 3, a tool clamp movement system 4, a restraint layer jetting system 5, a dynamic optical monitoring system 6, an above control system, a central integration control system 7 and the like. A forming method of the dynamic self-adaptation control device is characterized in that laser beams emitted by the laser device 1 are transmitted into the laser impact head 3 through the light guide and reflector path adjusting system 2; the laser beams are adjusted and transmitted to the surface of the metal plate 18 clamped to the tool clamp movement system 4; the shot blasting surface of the metal plate 18 is covered with a restraint layer manufactured through the restraint layer jetting system 5, an energy absorption layer 22 absorbs lasers to generate impact waves in an induced manner to act on the surface of the plate; and the metal plate 18 generates fast plastic deformation or stress relief formation. According to the dynamic self-adaptation control device, three-dimensional impacts can be achieved, complex forming of large plates can be conducted, local micro forming can also be conducted, quantitative precise forming can be achieved, repeatability is good, and automatic production can be easily achieved.

The invention discloses a laser impact warm forming method with uniform heat and constant pressure functions and a device. According to the invention, a heating coil is adopted for increasing the temperature of a system, an oil pump is used for sucking cold liquid to lower the temperature of the system, so as to ensure that the temperature of the system is controlled within a pre-set temperature range; an overflow value is used for setting system pressure, the oil pump is used for sucking liquid into the cavity of a die so as to reach an appointed pressure; and laser induced impact wave is used as a power source for warm forming and enhancing to panel veneer. According to the invention, the advantages of both warm forming technique and laser impacting technique are combined, liquid is adopted for heating the panel veneer, the heating temperature is uniform and easy to control; the pressure control device is guaranteed to produce continuous back pressure so as to enable the stress to the panel veneer to be balanced. The method provided by the invention improves the forming performance of the panel veneer during laser impact forming process, and provides a novel concept to the formation of the panel veneer; and while the panel veneer is formed, the service life and stress and corrosion resisting performance of the panel veneer are improved.

The invention discloses a tubular product hydraulic forming device capable of achieving inside and outside pressurization and relates to a tubular product part forming device. The device solves the difficult problems that a traditional inner high-pressure forming die can achieve tubular product axial feeding but can not achieve tubular product outside pressure sealing, and a whole sealing container can be used for achieving the outside pressure sealing but not achieving the axial feeding. The tubular product hydraulic forming device comprises an upper die of a die, a lower die of the die, an upper template, a lower template, a left side punch and a right side punch, wherein a ring-shaped groove surrounding a cavity of the die is formed in the upper die, a ring-shaped protrusion is formed in the lower die, the groove is in clearance fit with the protrusion, a ring-shaped elastic sealing ring between the groove and the protrusion and a sealing ring among the left side punch, the right side punch and a boss of the lower die jointly ensure the tubular product outside pressure sealing, a die splitting mode that the groove is in clearance fit with the boss is adopted to ensure that no leakage of the tubular product outside pressure happens, under the joint effects of the inside pressure, the outside pressure and the axial feeding, plastic deformation occurs in the tubular product, and formability of the low-plastic tubular product is improved.

The invention provides a mold for achieving in-mold rapid forming and quenching. The mold comprises an upper mold, a binder ring and a lower mold, the upper mold is composed of an inner solid mold core and a thin-walled skin, and interconnected grooves are formed between the inner solid mold core and the thin-walled skin. In the forming stage, no heat insulation material such as filler or fillinggas exists in the grooves, and a low-temperature medium is introduced into the grooves in the quenching stage. The mold has the advantages that the forming and quenching processes are relatively independent and have little influence on each other, the skin is small in wall thickness and small in heat capacity, the grooves are filled with the heat insulation materials, the problem that a hot plateblank and a cold mold are rapidly cooled after making contact during forming can be avoided, and rapid cooling and quenching of the formed hot plate blank can be achieved. The mold core is prepared from common mold materials through common machining equipment, the mold manufacturing period is short, and the cost is low. The mold can be used for achieving rapid forming and quenching of metal materials of different types and thicknesses.

The invention discloses a powder feeding method and device for multi-material selective laser melting integral forming. The device comprises a laser device, powder storage barrels, powder materials, electromagnetic valves, controllers, a scraper and a lifting forming cylinder. The scraper is mounted at the upper end of the lifting forming cylinder in a sliding mode. The laser device is mounted at the upper end of the lifting forming cylinder through a support. The powder storage barrels are symmetrically mounted on the two sides of the upper end of the lifting forming cylinder. The electromagnetic valves are mounted in powder discharging pipelines at the lower ends of the powder storage barrels. The powder storage barrels are filled with the powder materials. The electromagnetic valves are connected with the controllers. The device is convenient to operate; according to the requirements for material properties of different heights of formed parts, the selective laser melting equipment controllers send corresponding instructions to control closing of the electromagnetic valves and the initial position of the scraper, so that integral forming of dissimilar materials is achieved, the limitation that a single-material part is formed through selective laser melting is broken, and the application range of the technology is greatly widened.

The invention belongs to the field of wire laser additional material manufacturing, and discloses a polymer multi-material multi-laser flexible additional material manufacturing system and method. Thesystem comprises a plurality of modules, the modules correspond to different regions in a single slice layer, each module comprises a laser emitting unit, a plurality of robots and wire feeding unitsand extruding units which are matched with the robots, the laser emitting units and the extruding units are arranged separately so that extruding and melting are performed separately to avoid clogging of spray heads of the extruding units; the extruding units are arranged at the tail ends of the robots, the robots carry the extruding units to preset positions to achieve the transportation of wires, each robot conveys a wire correspondingly, the robots perform wire feeding according to preset trajectories and sequence, and the fed wire is melted under the action of the laser emitting unit to achieve forming of a plurality of materials of each slice layer. The polymer multi-material multi-laser flexible additional material manufacturing system and method solve the problem that the spray heads are easy to clog, improve the flexibility of the manufacturing system and achieve forming of large-sized products.

The invention provides a method for 3D printing of a porous ceramic texture engineering workpiece, and belongs to the field of material preparation in additive manufacturing. The preparation method comprises the following steps: uniformly mixing two ceramic powders, namely beta-tricalcium phosphate and magnesium silicate, with an additive through rolling ball-milling, pre-sintering the mixed powder, and conducting crushing to obtain ceramic composite powder; mixing the ceramic composite powder with organic premix liquid to prepare ceramic slurry which is high in solid content, low in viscosityand suitable for printing; adopting 3D gel printing for printing forming, and conducting drying, degreasing and sintering on a printing blank to obtain a porous ceramic product sintered body; and then soaking the porous ceramic product sintered body in a polycaprolactone (PCL) solution to prepare a polycaprolactone (PCL) film layer on the surface of the product sintered body, so as to overcome the brittleness and low strength of a tricalcium phosphate ceramic scaffold, and improve the biocompatibility.

The invention discloses a method for conducting multi-pass flaring forming on a plate type heat exchanger bushing ring. The method comprises the steps that firstly a pipe blank is assembled to the interior of an inner hole of a plate type heat exchanger pressing plate, and the pipe blank is supported onto a lower die; then the flaring pass is determined according to the thickness of the pipe blankand the length of a free end; a flaring die moves downwards in the axial direction in the multi-pass flaring process, after the flaring die makes contact with the free end of the pipe blank, the freeend is flared open, and after flaring is conducted, the angle of the free end of the pipe blank meets the requirements of the multi-pass flaring angles; the flaring die is replaced by a flattening die, the flattening die moves downwards in the axial direction, and after the flattening die makes contact with the free end of the pipe blank, the flattening die begins to flatten the free end till theangle of the free end becomes 90 degrees; and finally the flattening die exits, machining of a plate type heat exchanger bushing ring flange edge is completed, and the plate type heat exchanger pressing plate provided with the bushing ring is obtained. According to the method, forming of the plate type heat exchanger bushing ring flange edge is achieved by adopting a multi-pass flaring forming mode, cracking of the flange edge in the machining process is prevented, the die structure is simple, the machining process of the plate type heat exchanger bushing ring is effectively simplified, and the machining efficiency and the forming quality are improved.

By casting and processing a heat-punching mould, a complex cooling system can be embedded into the heat-punching mould, in order to avoid the limitation brought to the heat-punching mould by a drilling process, the heat-punching mould with more complete functions can be designed, the heat-punching mould is designed to be a heat-punching composite mould, and functions of shaping, punching, quenching and the like are integrated. According to a design concept of the heat-punching composite mould, the heat-punching composite mould is designed according to the structure and the shape of a heat-punching piece, on the basis of the structures of the heat-punching piece and a mould, the cooling system is designed, and the best design scheme is obtained by optimization. A manufacture process of the heat-punching composite mould is that firstly the cooling system of the heat-punching mould is processed through the processing of a pipeline bending, then the cooling system is embedded into the heat-punching mould via casting, and finally the heat-punching composite mould is obtained according to machinery processing, heat treatment and assembly.

The invention provides a skin stretch-forming method with a transition sectional face of a flexible multipoint mould. The method includes the following steps of step1, the appearance of an intermediate transition skin is calculated; step2, a data model of initial sectional face of an intermediate transition mould is formed; step3, skin stretch forming is carried out to form an intermediate transition skin (4); step4, a next intermediate transition mould sectional face or a final transition mould sectional face is designed; step5, step3 and step4 are repeated in sequence until the final skin (4) is formed. According to the skin stretch-forming method with the transition sectional face of the flexible multipoint mould, a plurality of scattered punch bars with adjustable heights are used for fitting the three-dimensional sectional face of the mould, and therefore forming requirements of parts with different sectional faces are met.

The invention discloses three-dimensional free bending and numerical-control winding combined molding equipment and belongs to the field of metal complex hollow component molding equipment. The equipment comprises a rack, a feeding mechanism, a free bending molding mechanism and a numerical-control winding molding mechanism. The feeding mechanism comprises a pipe material clamping device, a propelling mechanism and a linear guide rail I, wherein the pipe material clamping device is used for preventing a pipe material from losing stability in the axial direction in the molding process. The freebending molding mechanism comprises a guiding mechanism, a spherical bearing and a free bending mold. The free bending mold rotates around the guiding mechanism under the effect of the spherical bearing, so that free bending molding of the pipe material is achieved. The numerical-control winding molding mechanism comprises a clamping block and a numerical-control winding bending mold. The clamping block rotates around the numerical-control winding bending mold, so that molding is achieved. By means of the three-dimensional free bending and numerical-control winding combined molding equipment,free bending molding of a complex bending component can be achieved, and meanwhile, molding of a blank with the minimum bending radius being as low as 1.5D can be achieved, wherein D represents the outer diameter of the blank.

The invention discloses a novel Al-Mg-Si alloy material high in strength and resistant to seawater corrosion and a preparation method thereof. By adoption of the alloy material, mutual contradiction between the corrosion resistance and the strength in the ship material designing process is effectively overcome. The alloy material comprises, by mass, 1.8-3.6 wt% of Mg, 1.6-3.3 wt% of Si, 0.45-0.65 wt% of Mn, 0.25-0.35 wt% of Cr, 0.15-0.3 wt% of Zr, 0.2-0.3 wt% of Ti, 0.2-0.5 wt% of Ag, no more than 0.03 wt% of each impurity, no more than 0.1 wt% of all impurities, and the balance Al. According to the novel Al-Mg-Si alloy material high in strength and resistant to seawater corrosion and the preparation method thereof, the multi-component composite micro-alloyed element design is adopted, and the smelting and casting technique, the rolling control method and the solution and aging heat treatment technique are optimized, so that the Al-Mg-Si alloy material which is accurate in component, reasonable in structure regulation and control, and excellent in comprehensive performance is prepared. The tensile strength of the obtained material is not smaller than 375 MPa, the ductility is not smaller than 12.0%, the intercrystalline corrosion resistance is the first level (according to GB / T 7998-2005), the maximum corrosion depth is 0.03 [mu]m, and the exfoliation corrosion resistance is the N level (according to GB / T 22639-2008).

This invention relates to an electromagnetic progressive shaping method for plate moving coils and a device, in which, said device includes a computer control system, an electromagnetic force generation system and a three-shaft digital control shaping system including a plate clamping elevating device, a supporting model frame and an electromagnetic shaping clamping rod, in which, the computer controls the coil to move downward along the contour of a model profile from the top according to the contour data of the model profile and the plate is formed partly relying on the magnetic force of coil till to the bottom of the model and finish the entire process.

The invention provides porous nickel with a cross-scale multistage pore structure and a preparation method and application thereof, belongs to the technical field of porous metal materials. The preparation method includes the following steps of: modeling: using software to design a three-dimensional model of a porous structure. Conversion: transforming the three-dimensional model to a two-dimensional slice model and generating a corresponding processing program in the software. Machining: preparing a nickel-aluminum or nickel-silicon or nickel-zinc porous material with first stage pores by using a metal selection laser melting method. Dealloying corrosion: etching the aluminum or silicon or zinc in the aluminum-nickel porous material by placing the aluminum-nickel porous material in demineralized solution to form second stage pores. The method is fast and efficient, and can achieve the personalized manufacture of porous nickel with the cross-scale multistage pore structure. The porousnickel has the advantages of light weight, high strength, large specific surface area, high temperature resistance and anti-oxidation, and the structure can be controlled. The material can be used toform various complex structure and can be used as a filter material, a heat dissipation material or a shock absorption material and so on.

The invention belongs to the field of the metallurgical machinery, which more particularly relates to an inert atmosphere protective box used for preparing, processing and forming metallic materials by laser. The external circumferential wall of a box body is provided with 7 flange holes, and a motion small platform is arranged in the box body. A numeral control machine is connected with the motion small platform through connecting rods inserted into the flange holes. A workpiece is fixed behind the motion small platform and inert gases are pumped into the box body after the box body is vacuumized. The numeral control machine controls the track of the motion small platform, and a laser completes the processing and formation of parts. The box body can be designed in a target-oriented way according to the dimension of the processed parts, which has flexible design and small dimension. The consumed inert gas is little, and the operating cost is low; as the parts are fixed on the horizontal connecting rod which can rotate, the laser processing and formation of the rotational parts can be realized. The invention also has the characteristics of good protection effect and low cost.

The invention discloses a heart simulation structure as well as a forming method and a special mold thereof and belongs to the field of organ production, biological materials and medical instruments. The heart simulation structure comprises a main body structure, at least one heart chamber structure, at least one blood vessel system and at least one nervous system, wherein the main body structure is a mixture of hydrogel and myocardial seed cells, is high in biocompatibility and can facilitate realization of a blood pumping function of a heart; each blood vessel system is dendritically or spirally distributed on the periphery of each heart chamber structure; each nervous system is located in the main body structure. The special mold comprises at least one casing top, at least one casing bottom, at least one air sac, at least one blood vessel system catheter and at least one nervous system catheter, wherein the at least one casing top and the at least one casing bottom are sealed through embedment assembly to constitute the outside of the mold; the at least one air sac, the at least one blood vessel system catheter and the at least one nervous system catheter are located inside the special mold. A new idea is provided for in-vitro rapid construction of the artificial heart, and the heart simulation structure is similar to real hearts of animals in form and function.