32results about How to "Uniform mechanical properties" patented technology

The invention discloses an aluminum alloy extrusion forming production process, which relates to the technical field of extrusion production, and comprises the following steps: designing an extrusion die, carrying out surface heat treatment on the extrusion die, selecting an aluminum alloy material, heating and extruding, carrying out surface treatment processing on a produced aluminum alloy profile, and packaging the aluminum alloy profile after the aluminum alloy profile is inspected to be qualified. Compared with the prior art, the method has the advantages that the grain structure of the profile can be more uniform and refined by accurately regulating and controlling the complex relation among parameters such as the extrusion temperature, the mold temperature, the extrusion speed and the lubricating condition, so that the mechanical property is enhanced, like a 6063 aluminum alloy profile, the tensile strength can be improved, the yield strength is improved, deformation or damage in the using process is effectively avoided, and meanwhile, the service life of the profile is prolonged. Good parameter matching can effectively reduce internal defects of the profile, metal can flow in a mold more smoothly, internal pores, cracks and other defects caused by non-uniform metal flow are reduced, and the surface quality is greatly improved.

The invention belongs to the technical field of electroacoustics, and particularly relates to a vibrating diaphragm of a sound production device and the sound production device. The vibrating diaphragm of the sound production device comprises at least one phenyl silicone rubber layer, the phenyl silicone rubber layer contains a network polymer, and the phenyl silicone rubber layer is formed by curing liquid phenyl silicone rubber compound. The liquid phenyl silicone rubber compound comprises methyl phenyl vinyl polysiloxane, methyl phenyl vinyl silicone resin and phenyl hydrogen-containing silicone oil. According to the vibrating diaphragm with the phenyl silicone rubber layer, the bonding force between the vibrating diaphragm and a shell and between the vibrating diaphragm and a voice coil can be remarkably improved, and meanwhile, phenyl hydrogen-containing silicone oil and methyl phenyl vinyl polysiloxane have good compatibility, so that the phenyl silicone rubber layer is better in curing uniformity, more balanced in mechanical property and not prone to failure; in addition, the vibrating diaphragm has high damping performance, THD distortion of the vibrating diaphragm can be remarkably reduced, and the vibrating diaphragm has better acoustic performance.

The invention relates to the technical field of wire drawing machines, in particular to a continuous wire drawing machine with a wire tensioning device, the continuous wire drawing machine comprises an unwinding mechanism, a continuous wire drawing mechanism and a winding mechanism which are sequentially arranged from front to back, the continuous wire drawing mechanism comprises a rack, a winding drum and a lubricant box are arranged on the rack, and a wire drawing die assembly is arranged on the lubricant box; a wire tensioning device is additionally arranged between adjacent wire drawing units, and a split type drawing head is used for pre-drawing a wire completely covered by a lubricant, so that heat generated at an extrusion neck is dissipated in time, the mechanical properties of the inner layer and the outer layer of the wire are more uniform, the peeling phenomenon on the surface of the wire is avoided, and the service life of the wire is prolonged. And then the movable drawing head is used for further dynamically extruding and necking the protruding section of the wire rod which is not drawn in the pre-drawing process so as to finish the overall fine-drawing operation of the wire rod, and the movable drawing head and the split type drawing head in each wire drawing unit can be kept synchronous so as to be matched with the speed change of each wire drawing unit in the wire rod drawing process, so that the wire drawing quality is ensured.

The invention discloses a method for designing a bionic bone scaffold based on wall thickness mixed gradient change, and belongs to the technical field of bionic bone scaffolds. By designing the wall thickness mixed gradient function, the lattice unit can have wall thickness gradient change in the radial direction and the axial direction at the same time, so that the porosity also has gradient change in three directions at the same time, and the defect that a bone scaffold is designed by using a lattice material (beam unit) unit and a TPMS unit in the prior art can be well overcome; and the stent better conforms to the natural bone structure and mechanical property requirements. The designed bionic bone scaffold is excellent in mechanical property, high in compression resistance and deformation resistance and capable of promoting cell growth and tissue regeneration.

The invention discloses a blank making method for improving the texture uniformity of a TC18 titanium alloy thick plate type forge piece. The blank making method comprises the steps that firstly, Z-X-Y three-direction forging is conducted on an original bar; drawing out the blank subjected to three-direction forging in the X direction and the Y direction; and then the drawn blank is flattened and shaped in the X direction, the Y direction and the X direction in sequence. According to the method, Z-direction deformation is increased by adopting three-direction forging during blank manufacturing through a method of increasing the height deformation of the bar, so that the forge piece deforms in three directions in the blank manufacturing process, the difference of the deformation in the three directions of the blank in the blank manufacturing process is reduced, strong orientation texture segregation caused by the difference of the three-direction deformation is weakened, and the mechanical property of the forge piece has anisotropy; and the material is uniformly deformed in three directions, the effect of weakening the beta-phase texture is achieved, the requirement for improving the texture uniformity of the forge piece is met, and the mechanical property of the material is improved.

The invention provides an auxiliary cooling device for friction welding of a ring pipe structure and a working method of the auxiliary cooling device, and belongs to the technical field of friction welding. The problems that in the prior art, due to the fact that the surface of an inner ring of a large-diameter-thickness-ratio ring material dissipates heat slowly, the cooling speed of a welding area is uneven, residual stress is increased, the strength of a welding joint is affected, and due to the fact that the surface of the inner ring dissipates heat slowly, microstructure changes are uneven, and the mechanical property of the material is affected are solved. The device comprises a tailstock side clamp, a main shaft side clamp, an inert gas connecting pipe, a gas nozzle and a cooling medium spraying mechanism, the tailstock side clamp is installed in a movable sliding table box body of friction welding equipment, a tailstock side part to be welded is clamped in the tailstock side clamp, a main shaft side part to be welded is clamped in the main shaft side clamp, and the inert gas connecting pipe is connected with the gas nozzle. An inert gas connecting pipe is arranged in the main shaft side to-be-welded part, the outlet end of the inert gas connecting pipe is connected with the gas nozzle, and a cooling medium spraying mechanism is arranged on the inner side of the tailstock side to-be-welded part. The device is mainly used for cooling the welding seam of friction welding.

The invention relates to a thermal insulation composite fabric and a production process thereof, belonging to the technical field of functional fabrics. The thermal insulation composite fabric is composited with a densely woven base fabric and a thermal insulation adhesive. The thermal insulation adhesive uses aerogel micropowder as thermal insulation particles, is modified by introducing epoxy groups through a silane coupling agent KH560, is ring-opened by 2-(1-methylethyl)-3-oxazoline ethanol and epoxy groups, introduces oxazolidine structures on the surfaces of aerogel microparticles, and synthesizes a polyurethane prepolymer containing a polyether segment from polyether diol and diisocyanate as an adhesive material. During the fumigation curing process, the polyether segment is hydrophilic and preferentially infiltrated and diffused, and the oxazolidine structure on the surface of the modified aerogel powder is promoted to hydrolyze, expose active amine groups and hydroxyl groups, and promote the cross-linking of isocyanate in the prepolymer in the near-surface layer of the modified aerogel powder, so that the aerogel microparticles are uniformly fixed with the polyether segment of the prepolymer as a template, and are segmented in the adhesive layer to form intricate and tortuous heat conduction channels, thereby increasing the thermal resistance of the adhesive layer and having a good thermal insulation effect.

The present application relates to the technical field of high polymer composite material, and especially to a co-extrusion fabric, a preparation method and application thereof, and is especially suitable for the field of steel-plastic composite floor which is strict in size stability and mechanical property requirement, such as building decoration, industrial floor, outdoor paving, etc., the co-extrusion fabric comprises the following raw material components in parts by weight: polyethylene: 40-70 parts; elastomer: 20-50 parts; compatibilizer: 3-10 parts; inorganic mineral: 5-10 parts; antioxidant: 0.1-1 part; lubricant: 0.5-1 part; a low-shrinkage, anti-warping polyethylene composite zinc-aluminum-magnesium alloy steel-plastic floor co-extrusion fabric is provided, by optimizing the raw material ratio, selecting special compatibilizer and inorganic mineral filler, the efficient compatibility of polyethylene, elastomer and inorganic filler is realized, the polyethylene crystalline morphology is controlled, the material shrinkage is greatly reduced, the hidden danger of warping deformation is eliminated, and the mechanical strength, toughness and weather resistance of the material are improved.

This utility model discloses a heat treatment and shaping device for polyester fiber yarn, including a drying box. A fixed frame is fixedly installed inside the drying box, and a placement plate is provided above the fixed frame. The placement plate is slidably connected to the fixed frame via a slider. A first sliding rod is fixedly installed inside the fixed frame, and the slider is slidably sleeved with the first sliding rod. A first cam is rotatably installed on the fixed frame. An installation frame is fixedly installed inside the drying box, and a movable frame is slidably installed on the installation frame. A carding frame is rotatably installed on the movable frame. Through the synergistic action of the placement plate, slider, first sliding rod, first cam, and first spring, the placement plate and the fiber yarn it carries are driven to generate controllable reciprocating vibration or oscillation inside the drying box. This dynamic treatment method effectively breaks the static structure of multi-layer stacked fiber yarn and significantly promotes the penetration and circulation of the heat medium inside the fiber layer and between different layers.

The invention discloses an elastic wire mechanism and an anti-shake lens. The filament bouncing mechanism comprises a three-dimensional elastic piece and an AF elastic piece. The AF elastic sheet comprises a carrier connecting part used for being connected with a carrier and a support connecting part used for being connected with a support. An AF main elastic wire used for resetting a carrier AF is arranged between the carrier connecting part and the support connecting part, and the AF main elastic wire comprises a functional section and a first avoiding section used for avoiding an AF dispensing groove in the carrier. The three-dimensional elastic sheet is integrally formed by etching the same base material of the elastic sheet body, the AF elastic wire and the elastic blocking sheet, a splicing link is avoided, the structural strength is high, the mechanical property is unified, and a carrier AF auxiliary reset function and a support OIS core reset function are integrated. And the AF main elastic wire is provided with a first avoiding section for pertinently avoiding a carrier AF dispensing groove, so that the normal operation of dispensing operation is ensured.

A kind of matrix self-loading photocatalytic high-strength high-toughness polymer and its preparation method, belong to the cross technical field of solid waste resource utilization and functional building materials, the raw material of the polymer includes the following components by weight parts: base activator 30-50 parts, silicon-aluminum precursor 100-120 parts, high-activity nanometer silicon powder recovered from scrap photovoltaic panel 15-25 parts, surface-modified glass fiber recovered from scrap photovoltaic panel 8-12 parts, water 10-20 parts.The present application realizes the full-value consumption of silicon powder and glass fiber components in scrap photovoltaic module by low-temperature pyrolysis, grading screening and directional modification process, activates the photocatalytic activity of recycled elemental silicon by mechanical chemical means, and assists directional interface modification to strengthen the reinforcing effect of fiber, so as to realize the deep coupling of mechanical properties and photocatalytic function in a single material system.

The invention discloses an SAE8620H steel tail end hardenability detection method, belongs to the technical field of metal material performance, and aims to solve the problem of poor consistency of detection values of a hardenability detection method in related technologies. Comprising the following steps: preparing a sample; the sample is placed in a heat treatment furnace, nitrogen is added into the heat treatment furnace, the whole hearth of the heat treatment furnace is covered with the nitrogen, and the sample is heated to the austenitizing temperature; after the heat preservation time is ended, taking out the sample from the heating furnace, and carrying out water spray quenching on the sample; after quenching is completed, the sample is put into water to be cooled; after the sample is cooled, the hardness of the quenched end of the sample is measured; according to the invention, the consistency and accuracy of hardenability detection values can be improved.

The present invention discloses a non-anisotropic high-performance slab rotary extrusion forming method, comprising an upper die assembly, a lower die assembly, and a rotating seat assembly; the upper die assembly comprises an upper die plate and a punch connected to the lower part of the upper die plate, and the lower end surface of the punch is provided with a cross-shaped groove; the lower die assembly comprises a split insert, a fixed platform, a support seat, and a concave die connected to the upper part of the support seat, the concave die is provided with an extrusion cavity, a fixed platform with a through hole in the middle is fixed to the bottom of the extrusion cavity, a split insert is placed above the fixed platform, the upper surface edge of the split insert forms a plurality of special-shaped grooves, the middle part of the upper surface forms a hollow channel, and the upper surface edge is inclined and concave to the middle part of the upper surface; the support seat is provided with an extrusion cavity, and a correction plate is provided at the top of the extrusion cavity, and a plate-shaped hole is provided in the middle of the correction plate; the lower part of the support seat is connected to the rotating seat assembly. The present invention increases the single-pass strain amount, improves the accumulated strain, and enhances the grain refinement effect of the deformed billet, so as to obtain a high-performance ultra-long slab at one time.

This invention provides a continuous ultrasonic welding apparatus and method with active thermal management, relating to the field of ultrasonic welding technology. The continuous ultrasonic welding apparatus and method with active thermal management includes: a support suspension fixedly mounted on the end face of a linear motion platform capable of linear reciprocating movement along the weld seam arrangement direction of the workpiece; at least two sets of actuators sequentially mounted and fixed on the support suspension, and the relative spacing between the actuators is flexibly adjusted by a matching adjustment mechanism. This invention solves the problem of pressure rollers gradually heating up, becoming thermally saturated, and even losing their cooling and shaping ability due to prolonged operation. It enables the pressure roller to apply effective cooling pressure to the molten zone promptly after the welding head is removed, allowing the material to cross the glass transition temperature more quickly and complete solidification and shaping. This reduces the probability of defects such as springback, warping, residual porosity, and delamination in the later stages of the weld, ensuring a more uniform forming quality and mechanical properties throughout the weld.

The invention relates to a casting process for eliminating shrinkage porosity of a large bearing, and belongs to the technical field of bearing casting. The wear resistance and the corrosion resistance are enhanced by using the molybdenum carbide coating sprayed by the electric arc, a good adhesion foundation is provided for the coating through sand blasting treatment, the wear resistance and the corrosion resistance of the bearing are remarkably improved through the molybdenum carbide coating, and the service life is prolonged; the four heat treatment modes of annealing, normalizing, quenching and tempering are combined for use, so that the material structure is more uniform, certain hardness is kept, meanwhile, the brittleness is reduced, the plasticity and toughness are improved, better strength and toughness are achieved, meanwhile, the expansion tendency of defects such as shrinkage porosity is reduced, the bearing has more balanced mechanical properties, and the service life of the bearing is prolonged. And the use requirements under complex working conditions are met.

The invention discloses a preparation method of an oligomeric silsesquioxane material modified moisture-curable polyurethane hot melt adhesive, and relates to the technical field of adhesives. The hot melt adhesive is prepared from the following raw materials in parts by weight: 10 to 30 parts of polyether polyol, 20 to 40 parts of polyester polyol, 10 to 20 parts of methacrylate copolymer resin, 1 to 5 parts of color paste, 5 to 15 parts of heptaisobutyltrisilanol-polyhedral oligomeric silsesquioxane, 15 to 25 parts of diphenylmethane diisocyanate and 0.1 to 0.5 part of a catalyst, the preparation process comprises the steps of vacuum dehydration of raw materials, secondary dehydration after addition of TPOSS, MDI reaction, addition of a catalyst, stirring, discharging and the like. The glass transition temperature, the high temperature resistance, the aging resistance and the corrosion resistance of the polyurethane hot melt adhesive are remarkably improved, meanwhile, the good body mechanical property and the bonding strength to different base materials are kept, and the polyurethane hot melt adhesive can be widely applied to bonding of key components in the consumer electronics industry, the intelligent wearing industry and the automotive electronics industry.

The invention belongs to the technical field of medical instruments, and particularly relates to a valve replacement device which comprises a support mechanism, a valve replacement mechanism and a valve replacement mechanism. The valve leaflet mechanism is located in the inner frame and comprises a plurality of artificial valve leaflets; the valve leaflet mechanism further comprises a plurality of valve leaflet connecting structures, each valve leaflet connecting structure is provided with a connecting lug and a connecting piece, the two sides of the outflow end of each artificial valve leaflet are each connected with one connecting lug, and the two ends of each connecting piece are arranged in the connecting lugs connected with every two adjacent artificial valve leaflets respectively. And the outer layer of the connecting lug and the connecting layer clamp the connecting sheet so as to connect two adjacent artificial valve leaflets. The outflow end of the artificial valve leaflet is connected with the inner frame through the valve leaflet connecting structure, when the valve leaflet connecting structure is connected with the inner frame through a suture line, the suture line acts on the ear connecting parts of the outer layer and the inner layer, and the connecting layer only needs to bear tearing force from the artificial valve leaflet and does not need to bear external force such as tearing force similar to the suture line any more; and the service life of the artificial valve leaflet is prolonged.

This invention provides an environmentally friendly ceramic-plastic composite material, decorative panel, and its preparation method. The composite material comprises the following components by weight: 35-45 parts PVC resin powder, 40-50 parts activated waste ceramic powder, 5-18 parts polyamide filaments, 1-3 parts heat stabilizer, 1-3 parts lubricant, and 0.5-3.5 parts processing aid. This invention completely replaces traditional calcium carbonate filler with waste ceramic powder and completely replaces bamboo and wood fibers with polyamide filaments (0.5-50mm long and short mixed). Under extrusion conditions of 175-190℃, the fibers only soften and do not melt, extending and flowing synchronously with the melt, completely solving the pore and bubbling defects caused by the carbonization of bamboo and wood fibers. The product is dense, non-porous, highly tough, highly water-resistant, and aging-resistant. It adopts an online roll-press textured integrated molding process, eliminating the need for film coating and adhesive bonding. This invention can completely replace existing bamboo and wood fiberboards, carbon crystal boards, and stone crystal boards, and can be widely used in the field of interior decorative wall panels.

The application discloses a cooling mold device and a continuous casting method thereof. The cooling mold device comprises a crystallizer assembly and a mold die assembly. The mold die assembly is arranged in the interior of the crystallizer assembly, and the mold die assembly and the crystallizer assembly are conically fitted and installed. The mold die assembly comprises a mold core rod, a first fixed copper sleeve, a second fixed copper sleeve and a plurality of mold inner linings. The plurality of mold inner linings are distributed in a circular array in a circumferential direction. The mold core rod is arranged in a cavity formed between the plurality of mold inner linings. The upper and lower ends of the plurality of mold inner linings are fixed by the first fixed copper sleeve and the second fixed copper sleeve respectively. The cooling mold of the application is composed of multiple materials with different thermal conductivity coefficients arranged in the circumferential direction. The application weakens the problem that the heat exchange coefficient is strong at the lower part and weak at the upper part of the casting blank due to the gravity of the casting blank itself during the horizontal continuous casting process. The cooling during the horizontal continuous casting process is more uniform. Therefore, the casting blank with more uniform structure, composition and performance can be obtained, and the quality of the casting blank is improved.

The invention provides a production process of a large-diameter pure nickel pipe, and relates to the technical field of pipe processing, the process comprises the following steps: S1, material preparation: weighing raw materials according to the components of the pure nickel pipe; s2, casting: adding the raw materials into a smelting furnace for vacuum induction smelting, and remelting electroslag to obtain a cast ingot; s3, forging is conducted, specifically, the cast ingot is heated and forged into a solid billet; s4, perforating: heating the solid billet ingot, and extruding and perforating the solid billet ingot into a hollow pipe billet; s5, deformation is conducted, specifically, the hollow pipe blank is drawn and rolled to the target size, and a semi-finished product is obtained; and S6, the semi-finished product is subjected to heat treatment and coping, and the pure nickel pipe is obtained. According to the method, the pretreated raw materials are subjected to vacuum induction melting and electroslag remelting to obtain the cast ingot, the cast ingot is forged and perforated to obtain the hollow pipe blank, a reasonable deformation and heat treatment process system is designed, the purpose of producing the large-diameter pure nickel pipe is achieved, and the large-diameter pure nickel pipe is uniform in chemical component, low in impurity content and uniform in mechanical property.

The invention relates to high-sulfur steel for an automobile hub and a preparation method of the high-sulfur steel. The preparation method comprises the following steps: converter smelting (taking quantitative non-desulfurized molten iron and high-quality scrap steel as raw materials for primary smelting and tapping in a converter, sequentially adding silicomanganese and high-carbon ferromanganese according to the sequence, and adjusting the S content according to the S content of molten steel at the end point of the converter and by adding ferrous sulfide in the tapping process), LF refining, continuous casting and steel rolling. By using the high-sulfur steel for the automobile hub produced by the invention, the Mo element and a large amount of Ti element do not need to be independently added, so that a large amount of cost can be saved. The steel has good cutting performance, meanwhile, the steel needs to have excellent obdurability to keep part stability, and the mechanical performance in the hot rolling state can meet the following requirements that the tensile strength is larger than or equal to 735 Mpa, the lower yield strength is larger than or equal to 420 Mpa, the ductility is larger than or equal to 16%, and the hot rolling hardness ranges from 210 HB to 240 HB.

The application discloses an extrusion casting forming device, which comprises a rack, a fixed mold, a movable mold, a forging mechanism and a pressure injection mechanism arranged on the rack, the forging mechanism drives the movable mold to move and combine with the fixed mold to form a mold cavity matched with the shape of a casting, the pressure injection mechanism injects metal melt into the mold cavity to fill the mold cavity and seal the mold cavity, and the forging mechanism drives the movable mold to continuously forge the casting in the mold cavity after the mold cavity is filled.

The invention discloses a pure-carbon-dioxide-resistant anti-explosion ternary fluororubber material and a preparation method of the pure-carbon-dioxide-resistant anti-explosion ternary fluororubber material. The material is prepared by taking ternary fluororubber raw rubber as a matrix, matching magnesium oxide, calcium hydroxide, light carbon black, thermal cracking carbon black, flaky calcium carbonate, a flaky air blocking agent, a WS280 processing aid, palm wax and a fluorine-linked 5 # vulcanizing agent, and carrying out plastifying and mixing, first-stage mold pressing vulcanization and second-stage drying oven vulcanization on the matrix and magnesium oxide, calcium hydroxide, light carbon black, thermal cracking carbon black, flaky calcium carbonate, flaky air blocking agent, WS280 processing aid, palm wax and fluorine-linked 5 # vulcanizing agent. Through the physical barrier effect of the flaky filler and the collaborative design of a specific vulcanization system, the anti-permeation and anti-bubbling performance of the material in a high-temperature and high-pressure pure COenvironment is remarkably improved, and meanwhile, good mechanical strength, suitable hardness and low-compression permanent deformation are kept. The preparation process of the material is compatible with traditional rubber processing, the process is stable and controllable, and the material is suitable for sealing parts under harsh working conditions such as carbon dioxide capture, utilization and storage and has a good industrial application prospect.

The invention discloses a composite ceramic containing B4C and a preparation method thereof, and belongs to the technical field of composite ceramics. The preparation method of the composite ceramic comprises the following steps: mixing B4C powder, boron powder and transition metal carbide powder, and carrying out ball milling and drying to obtain a precursor material; and putting the precursor material in a vacuum environment, and sequentially carrying out pre-sintering, pressure change cycle sintering and pressure relief cooling to obtain the B4C-containing composite ceramic. According to the preparation method, B4C powder, boron powder and transition metal carbide powder are taken as raw materials, and a multi-time pressurization-decompression circulating sintering technology is adopted at a specific temperature, so that the B4C-containing multiphase ceramic material which is uniform in second phase distribution, low in density, high in hardness, high in strength, high in toughness and uniform in mechanical property distribution is prepared; the preparation method disclosed by the invention is simple, short in period, good in repeatability and easy to implement, so that the preparation method has a good practical application value.

The application provides a kind of anti-freezing high-performance concrete for building 3D printing and a preparation method thereof, the concrete contains cement 80-100 parts by mass, fly ash 80-100 parts, slag powder 220-270 parts, silica fume 15-30 parts, fine aggregate 1200-1500 parts, and polycarboxylic acid high-performance water reducing agent, thickening agent, polypropylene fiber and / or modified cellulose ether, water-binder ratio 0.55~0.67, fine aggregate is natural sand, granite waste sand or mixture thereof, replacement rate 0%~100%. During preparation, accurate measurement, dry mixing, solution preparation, wet mixing fluidization, high-speed slurry, printing forming and moisture curing are carried out. The application adopts microstructure self-optimization active anti-freezing design, without coarse aggregate, which greatly reduces carbon emission, the anti-freezing grade of concrete reaches F125-F150, with excellent printability and mechanical properties, without printing head blockage problem, the preparation process is controllable, and is suitable for building 3D printing engineering in cold and seasonal freeze-thaw areas.

The invention provides a method for connecting ceramic / glass and metal through a laser surface modification technology. The method solves the technical problems that an existing ceramic / glass and metal connecting interface is insufficient in infiltration, unmatched in residual stress and physical property and incompatible in metallurgy. Comprising the following steps: S1, cleaning, grinding and polishing a ceramic sheet / glass sheet; s2, coating the precursor solution on the surface of a ceramic sheet / glass sheet, and drying to form a precursor layer; the solute of the precursor solution is easy-to-decompose nitric acid metal salt or precious metal acid salt and a reducing agent, and the solvent is water; s3, after the precursor layer is irradiated by laser, cleaning and drying the ceramic sheet / glass sheet to obtain a surface-modified ceramic sheet / glass sheet; s4, under vacuum, assembling the surface-modified ceramic sheet / glass sheet and the polished metal sheet according to a sequence of ceramic sheet / glass sheet-metal sheet or ceramic sheet / glass sheet-brazing filler metal-metal sheet, overlapping and compressing to form an assembly, and cooling to room temperature; the method can be widely applied to the technical field of ceramic / glass and metal connection.

The application discloses a carbon fiber unmanned aerial vehicle part forming process and belongs to the unmanned aerial vehicle forming technical field, and comprises the following steps: taking a heated shrinkage polymer latex air bag matched with the shape of an unmanned aerial vehicle part as a mold core; carbon fiber prepreg is laid on the surface of the mold core through a multi-angle and multi-layer laying process to obtain a preformed part; the laying process comprises the following steps: sequentially laying a first carbon cloth layer, a second carbon cloth layer, a third carbon cloth layer, a fourth carbon cloth layer, a fifth carbon cloth layer and a sixth carbon cloth layer from inside to outside; the preformed part is formed by a hot press, and after the mold core is removed, a carbon fiber unmanned aerial vehicle part crude product is obtained; the carbon fiber unmanned aerial vehicle part crude product is polished and finished to obtain a carbon fiber unmanned aerial vehicle part finished product. The application realizes the stable laying of the multi-layer carbon cloth.

The present invention belongs to the field of medical device technology, and specifically relates to a vascular support structure and an artificial blood vessel including the vascular support structure. The vascular support structure is a 3D-printed grid structure, each grid includes four grid edges and four grid nodes; the grid nodes are divided into first-class nodes, second-class nodes, third-class nodes, and fourth-class nodes; the vascular support structure is axially divided into a middle bending area and end areas arranged on both sides; the number of nodes in the bending area is 1-3, the grid edges in this area are double-layer edges superimposed up and down, the superimposed cross-section is an oblate shape connected to each other, and the average superimposed wire height in this area is 1.2-1.8 times the wire diameter of the 3D-printed wire; the grid edges in the end area are single-layer edges. The bending area of ​​the vascular support structure of the present invention has good bending performance, can bend to a large extent without bending, and has good support strength, which can better adapt to the natural curvature of blood vessels in the body and the different blood vessel directions.

The utility model discloses a heating device. The heating device is used for heating a wire rod. The heating device comprises a device body, a heating mechanism and a heat conduction mechanism, the heating mechanism is used for generating heat, and the heating mechanism is arranged in the device body; the heat conduction mechanism is arranged in the device body, the heat conduction mechanism is arranged close to the heating mechanism, or the heat conduction mechanism makes contact with the heating mechanism, a heating space for heating the wire is defined by the heat conduction mechanism, and the wire penetrates through the heating space. Through the arrangement, the uniformity of the mechanical property of the wire can be improved, and the machining efficiency of the wire can be improved.

Abstract not available for ep3592497a1 – abstract of corresponding document: wo2018163017a1. The invention relates to a resistance spot welding process comprising the following successive steps: - providing at least two steel sheets having a thickness (th) between 0.5 and 3 mm, at least one of the sheets being a zinc- or zinc-alloy-coated steel sheet (a) having a tensile strength (ts) greater than 800 MPa and a total elongation (tel) such that (ts) x (tel) > 14000 MPa%, the composition of the steel substrate of (a) containing, by weight: 0.05% ≤ c ≤ 0.4%, 0.3% ≤ mn ≤ 8%, 0.010% ≤ al ≤ 3%, 0.010% ≤ si ≤ 2.09%, with 0.5% ≤ (si + al) ≤ 3.5%, 0.001% ≤ cr ≤ 1.0%, 0.001% ≤ mo ≤ 0.5% and possibly: 0.005% ≤ nb ≤ 0.1%, 0.005% ≤ v ≤ 0.2%, 0.005% ≤ ti ≤ 0.1%, 0.0003% ≤ b ≤ 0.005%, 0.001% ≤ ni ≤ 1.0%, the remainder being iron and unavoidable impurities,- to perform resistance spot welding of at least two steel sheets to produce a weld with an indentation depth (idepth) on the surface of said steel sheet (a) such that: 100 µm ≤ (idepth) ≤ 18.68 (znsol)- 55.1, (idepth) being in micrometers and znsol being the solubility of zn in the steel of sheet (a) at 750 °c, in % by weight.