4112results about How to "Guaranteed Strength" patented technology

The invention provides an enhanced 3D printer. The enhanced 3D printer comprises a workbench, and a transmission mechanism with a printing platform is installed on the workbench; an internal thread piece with an internal thread hole is detachably mounted on the printing platform, and the reinforcing screw rod is screwed in the internal thread hole of the internal thread piece; the printing platform is provided with a driving device used for driving the reinforcing screw to rotate. The model is bonded on the printing platform, and a reinforced hole is formed in the model; under the driving of the driving device, the reinforcing screw rod can do reciprocating motion in the vertical direction, and the reinforcing screw rod is screwed into the reinforcement hole or withdrawn from the model; the scraper in the trough can move from one side to the other side to push solid particles deposited at the bottom of the trough from the working area to the non-working area. The invention further provides an enhanced 3D printing method. According to the method, the situation that cracks and even fractures occur to the model due to the gravity influence and the binding force effect of the release film in the printing process can be effectively reduced or even avoided.

The invention belongs to the technical field of polyurethane, and particularly relates to a low-reaction-heat mine reinforcing material and a preparation method thereof. Comprising a component A and a component B, the component A comprises polyether polyol A, polyether polyol B, a flame retardant and a catalyst; the polyether polyol A takes a bisphenol compound and sorbitol as a mixed initiator; the polyether polyol B takes cane sugar and sorbitol as a mixed initiator; the component B comprises a prepolymer, a flame retardant and a viscosity reducer; the prepolymer is prepared by prepolymerizing polymerized MDI (Diphenyl Diisocyanate) and polyether polyol C; and the polyether polyol C takes tetrabromobisphenol A and dihydric alcohol as a mixed initiator. The bisphenol compound polyether polyol A and the high-functionality polyether polyol B which are used as specific initiators are mixed, so that the reaction heat is reduced, and the strength of the reinforcing material is improved; meanwhile, polyether polyol C starting from tetrabromobisphenol A is used, so that the flame retardance, the toughness and the strength of the prepolymer are enhanced; the prepared reinforcing material is high in compressive strength and low in reaction heat.

The invention relates to a preparation method of a carbide ceramic reinforced high-temperature alloy, and belongs to the technical field of additive manufacturing. The preparation method comprises the following steps: taking a high-temperature alloy as a matrix, and then adding carbide ceramic to prepare the composite material; the method comprises the following steps: mixing carbide ceramic powder with high-temperature alloy powder; the carbide ceramic is TiC, HfC or NbC; the high-temperature alloy is a CoNiCrW series high-entropy alloy or a NiCrWMo series medium-entropy alloy; the particle size of the carbide ceramic powder is 40-80 microns; the particle size of the high-temperature alloy powder is 40-90 microns; the composite material is prepared through an additive manufacturing process. The W element in the high-temperature alloy powder diffuses towards the surface of the carbide ceramic to form a thin interface layer, so that the interface bonding force between a matrix and the carbide ceramic phase can be ensured, the compatibility between the high-temperature alloy matrix and the carbide ceramic is improved, the interface cracking risk is effectively reduced, and the metallurgical quality of a composite material is greatly improved.

The invention relates to the technical field of oxytetracycline hydrochloride conveying, in particular to an oxytetracycline hydrochloride airflow conveyor which comprises an airflow feeding pump, an inner pipe discharging mechanism arranged on the airflow feeding pump, an outer pipe resonance mechanism arranged in the inner pipe discharging mechanism and a powder distributing and conveying mechanism arranged on the outer pipe resonance mechanism. And the air flow feeding pump is used for providing air flow kinetic energy for transferring the powdery oxytetracycline hydrochloride. An independent airflow feeding pump is arranged on a path for preparing oxytetracycline hydrochloride of a powder rotating roller, when the airflow feeding pump operates, constant-pressure airflow released outwards passes through an inner pipe discharging mechanism, thrust applied by part of air pressure can bear a pressure gasket to vibrate at high frequency along with transmission of part of airflow into a vibration bin assembly, and therefore the effect that oxytetracycline hydrochloride is subjected to high-frequency vibration is achieved. And finally, the inner pipe clamped by the plurality of pressure-bearing gaskets can continuously release the airflow outwards in a corrugated state, so that the loss of the powdery oxytetracycline hydrochloride on the pipe wall due to standing can be avoided.

The invention discloses fine-grain high-cleanliness steel for a harmonic reducer flexible gear of an industrial robot and a preparation method, and belongs to the technical field of metallurgy. The steel for the flexible gear comprises the following chemical components in percentage by mass: 0.38 to 0.42 percent of C, 0.20 to 0.30 percent of Si, 0.60 to 0.90 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, 0.60 to 0.90 percent of Cr, 0.15 to 0.25 percent of Mo, 1.50 to 1.80 percent of Ni, 0.015 to 0.035 percent of Nb, less than or equal to 0.0006 percent of O and the balance of iron and inevitable impurity elements. The production method comprises the working procedures of vacuum induction furnace smelting, electroslag remelting, casting blank forging, bar heating, bar rolling and rolled material cooling. The steel for the flexible gear has fine austenite grains and high cleanliness, and the technical requirements of the steel for the harmonic reducer flexible gear of the industrial robot are met.

The invention discloses a hydraulic mass concrete mix proportion intelligent optimization design method and system, and the method comprises the following steps: S1, inputting actually needed concrete indexes into a pre-trained and optimized intelligent hybrid prediction model, the concrete indexes at least comprising indexes related to strength and durability; s2, outputting an optimal concrete mix proportion through the intelligent mixing prediction model; the intelligent hybrid prediction model is an index feature weight determined according to the feature difference of concrete indexes, and is a high-generalization concrete macroscopic performance intelligent hybrid prediction model which is pre-constructed by fusing a plurality of neural network learning algorithm models in a weighting mode. The intelligent design of the concrete mix proportion can be rapidly and efficiently completed, and the scientificity and feasibility of the hydraulic mass concrete mix proportion design are improved.

The invention discloses a multifunctional electronic product screen protective film and a preparation method thereof. The protective film comprises a modified base film and a multifunctional composite layer compounded on the surface of the modified base film, the multifunctional composite layer comprises an elastic buffer layer and a self-repairing layer which are sequentially arranged from inside to outside; wherein the elastic buffer layer is an elastic buffer layer with gradient density; the elastic buffer layer comprises the following components in parts by weight: 100 parts of a thermoplastic polyurethane elastomer, 15-25 parts of hollow glass microspheres, 10-15 parts of polyethylene glycol and 3-6 parts of an isocyanate cross-linking agent; the self-repairing layer comprises the following components in parts by weight: 100 parts of a dynamic reversible covalent bond polymer, 30-40 parts of phase change material microcapsules, 10-15 parts of nano cellulose, 5-8 parts of a near-infrared photosensitive initiator and 2-4 parts of an antioxidant. Compared with the prior art, the protective film provided by the invention has excellent scratch self-repairing performance, good adhesion and high anti-explosion screen performance.

The invention provides a structure capable of controlling a large-volume water gate crack and a construction method thereof, and belongs to the technical field of water gates. The structure comprises a gate bottom plate and a gate pier which are formed by pouring concrete, and the gate pier is arranged above the gate bottom plate; hole cavities are at least formed in the gate piers and reserved in the concrete pouring process. The hole cavity is used as a self-constrained stress hole; and the tough material is used for absorbing stress, is filled in the pore cavity and is connected with the inner wall of the pore cavity. The method comprises the steps of S1, construction preparation; s2, foundation treatment; s3, gate bottom plate construction; s4, gate pier construction: S41, construction lofting; s42, gate pier reinforcing steel bars are bound and installed; s43, a gate pier formwork is erected above the gate bottom plate; s44, a hole forming device is installed at the designed position; s45, concrete pouring, vibrating and curing are conducted; and S46, after initial setting of the concrete, the hole forming device is pulled out of the pipe, and a formed hole cavity is filled with a tough material. The sluice pier crack can be effectively controlled, and the use durability and safety of the sluice are improved.

The invention discloses an immersed rotary ceramic membrane aeration device. The immersed rotary ceramic membrane aeration device comprises a base, a waterproof rotary motor, a rotary ceramic membrane component and a rotary joint, an internal air channel of the rotary ceramic membrane comprises an inner ring air collection cavity, a plurality of air flow channels with the same size and structure and an outer ring aeration cavity, the inner ring air collection cavity is communicated with air outlet holes corresponding to the rotary ceramic membrane where the inner ring air collection cavity is located and is communicated with the outer ring aeration cavity through the air flow channels, and different air flow channels distribute air independently. The inner ring gas collection cavity carries out secondary distribution on inlet gas, so that gas distribution is more uniform, the gas subjected to secondary distribution passes through the gas flow channels to be uniformly aerated, and meanwhile, the outer ring aeration cavity at the tail ends of the gas flow channels communicates all the gas flow channels, so that the aeration uniformity in each gas flow channel is further ensured. The whole device can be submerged in water for use, and installation, maintenance and application are all relatively flexible, simple and convenient.

The invention relates to the field of concrete processing, and particularly discloses a preparation method of concrete crack self-repairing particles. Comprising the following steps: S1, activating bacillus pasteurii to obtain a bacterial suspension; s2, placing the adsorption particle modified fiber in a bacterial suspension for adsorption treatment to obtain a load material; and S3, uniformly spraying alkyd resin liquid on the surface of the load material, drying and dispersing to obtain a finished product. When new micro-crack damage is generated in the use process of the concrete, the microorganisms play a self-repairing role to fill cracks in the concrete, so that the strength of the concrete is maintained, the service life of the concrete is prolonged, and the durability of the concrete is improved.

The invention discloses a steel pipe forging device with a positioning mechanism, which relates to the technical field of steel pipe forging and comprises a mounting frame, a core anvil, the positioning mechanism and a pneumatic hammer. And a component force forging mechanism for changing the forging direction of the pneumatic hammer is arranged on the mounting frame. The component force forging mechanism is arranged, kinetic energy provided by the pneumatic hammer is dispersed to the forging hammer, in the kinetic energy transmission process, under the condition that kinetic energy loss is reduced to the maximum degree, forging work is achieved, the kinetic energy loss is reduced, and the forging strength and precision are guaranteed; through cooperation with the first linkage mechanism, downward force applied by the pneumatic hammer is converted into rotating force, the mounting ring is pushed to generate large torque, then large force can be provided for pushing the forging hammer to move, and the forging effect is guaranteed; and by arranging the buffering mechanism, the reverse acting force borne by the rotating rod and the second connecting rod is buffered, and the situation that the rotating rod and the second connecting rod are deformed due to stress, and the next forging work is affected is prevented.

The invention discloses a variable-cross-section stacked box rigid frame aqueduct, a cantilever hanging basket and a prestress tensioning method in the field of prestressed concrete aqueducts, the transverse section of a water passing groove is a U-shaped section, and the U-shaped section of the water passing groove is far superior to a rectangular section in the aspects of water delivery flow conditions and flow passing capacity; a prestress continuous rigid frame structure form of a U-shaped water passing upper tank with a variable cross-section rectangular lower tank stacked upwards and a guide groove unified cross section and a two-system four-way prestress system are arranged, the concrete stress of the upstream face of the U-shaped water passing groove can be accurately and effectively controlled to be kept in a uniform compression state with a certain numerical value, and the anti-seepage and durability functions of the aqueduct are ensured. According to the tensioning method, the vertical steel beams and the U-shaped steel beams are partially tensioned firstly, so that the aqueduct web has certain vertical pressure stress, then longitudinal prestress is tensioned, the effect of the vertical steel beams and the U-shaped steel beams is prevented from being weakened by the longitudinal prestress, and pressure stress reserve of the upstream face of the U-shaped groove is guaranteed; the pouring hanging basket prevents the formwork from floating or shifting in the pouring process of the variable-thickness middle partition plate.

The invention relates to an artificial woven ligament and a weaving method, and relates to the technical field of medical prosthesis replacement. The invention relates to an artificial woven ligament, in particular to an artificial woven ligament which comprises two woven bodies and a non-woven body which is located between the two woven bodies and connected with the two woven bodies respectively. The woven body comprises a plurality of cylindrical single-layer woven cylinders which are sequentially arranged from inside to outside in a sleeving mode, and the ends, away from the non-woven body, of the single-layer woven cylinders form a conical body. A plurality of weaving fixing lines are connected between the single-layer weaving barrels. The artificial woven ligament has the advantages that the artificial woven ligament does not depend on weaving and cutting techniques of doctors, the diameter of the woven fabric can be changed according to actual conditions of patients, and different requirements of ACL reconstruction implants are met.

The invention discloses a UV-curable battery core insulating paint and a preparation method thereof, and belongs to the technical field of photocureable paints. The UV-curable battery core insulating paint comprises urethane acrylate, self-made vinyl ether modified urethane acrylate, epoxy acrylate, an acrylate monomer, mercaptan, a coupling agent, color paste, a photoinitiator and a leveling agent. The preparation method comprises the following steps: mixing the polyurethane acrylate, the epoxy acrylate, the acrylate monomer and the mercaptan, stirring at normal temperature for 60-120 minutes, adding the coupling agent, the color paste and the flatting agent, stirring at a high speed for 1-3 hours, adding the photoinitiator in a dark place, and stirring for 20-60 minutes to obtain the UV battery core insulating paint. The diluting capacity and the chemical resistance are considered, and the insufficient performance of matrix resin is supplemented; the combination of a photo-initiation system ensures efficient and rapid curing, adaptability to each light source and effective resistance to oxygen inhibition.

The invention relates to the technical field of power distribution cabinet machining, in particular to a power distribution cabinet assembly automatic bending machining device which comprises a base, a conveying unit is installed at the upper end of the base, a correcting unit is installed on the conveying unit, and a leveling unit is installed on the correcting unit; according to the plate bending and correcting device, the correcting units are arranged to be clamped to the four corners of a plate, so that the bent positions of the front end and the rear end of the plate can be transversely arranged, and then the bent positions of the plate are prevented from inclining; the plates are accurately fed according to the distance between the ends of the plates and the bending machine, so that the bending precision of the plates is improved, and the overall strength of the assembled power distribution cabinet is ensured; according to the flattening device, the flattening plate is arranged to flatten the bent position of the plate under the action of the downward pressing spring rod, meanwhile, the hammering mechanism is arranged to flatten the bent position of the plate, and flattening of the uneven surface of the plate is further guaranteed.

The invention discloses a rolled extra-thick stainless steel composite plate and a production method thereof. Base layer steel comprises the following chemical components in percentage by weight: 0.12-0.16% of C, 0.18-0.30% of Si, 1.30-1.50% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.02-0.04% of Alt, 0.15-0.25% of Cr, 0.50-0.60% of Mo, 0.55-0.65% of Ni, less than or equal to 0.10% of Cu, less than or equal to 0.02% of Nb, less than or equal to 0.0010% of B and the balance of Fe and inevitable impurity elements. The cladding stainless steel comprises the following chemical components in percentage by weight: less than or equal to 0.03% of C, less than or equal to 0.75% of Si, less than or equal to 2.00% of Mn, less than or equal to 0.035% of P, less than or equal to 0.015% of S, 8.0-12.0% of Ni, 18.0-20.0% of Cr, less than or equal to 0.10% of N and the balance of Fe and inevitable impurity elements; the process route comprises the steps of blank welding compounding, vacuumizing, controlled rolling and quenched-tempered heat treatment. The SA533B CL1 + SA240304L stainless steel composite plate with the thickness of 62-69 mm is produced, the inspection yield strength is larger than 345 MPa, the tensile strength is larger than 550 MPa, the impact energy at the temperature of 10 DEG C is larger than or equal to 200 J, the shear strength is larger than 310 MPa, and the intergranular corrosion crack rate is 0.

The invention relates to the technical field of high-temperature flue gas filtration, and particularly discloses a composite filter material flame-retardant filter cartridge and a manufacturing process thereof. The manufacturing process comprises the following steps: performing opening, mixing, carding, lapping, grid connection and pre-needling on polyester fibers and glass fibers to obtain a pre-needled felt; performing spunlace reinforcement treatment on the pre-needled felt to obtain a filter material plain felt; singeing the filter material plain felt, dipping the filter material plain felt in the dipping emulsion, mangling and drying to obtain a stiff filter material; pleating the stiff filter material, welding the stiff filter material into a barrel-shaped structure, welding a sealing opening of a fixing bandage, and mounting metal end covers at the two ends of the barrel-shaped structure to obtain the composite filter material flame-retardant filter barrel; the impregnating emulsion comprises the following raw materials in percentage by weight: 30-40% of a flame retardant, 30-40% of a stiffening agent and 30-40% of water. By adopting the steps of fiber compounding, dipping, mangling, drying and the like, the high temperature resistance and flame retardance of the filter material can be improved while the strength of the filter material is kept.

The invention provides an innovative vector propulsion system of a low-altitude airship, aims to provide accurate attitude adjustment and path planning capabilities for the low-altitude airship in a complex space environment, and consists of a plurality of key components, comprising an executing mechanism, a power driving module, a vector rotating mechanism, a propeller connecting mechanism, a detecting module and a propeller control system. The core characteristic of the airship is that adjusted vector thrust can be applied to any direction in a three-dimensional space so as to respond to real-time attitude adjustment and control requirements, so that accurate vertical rising, lateral flying and rotating operation of the airship in a limited space are realized; due to the unique design, the influence of the thrust direction change on the gravity center of the airship is reduced to the maximum extent, and therefore it is ensured that the low-altitude airship keeps the stable posture, and meanwhile fine control is achieved; the system is further integrated with a set of independent control system so as to guarantee accurate output of thrust angles, meanwhile, the overall structure is light and handy, the system particularly meets the requirements of low-altitude small airships, and the maneuverability and adaptability of the system in a narrow space are enhanced.

The invention relates to a small-specification low-chromium high-carbon steel wire rod and a preparation method thereof. The diameter of the wire rod is # imgabs0. Chemical components of the wire rod comprise 0.79%-0.84% of C, 0.20%-0.30% of Si, 0.70%-0.90% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.020% of S, 0.18%-0.23% of Cr, smaller than or equal to 0.0040% of O, smaller than or equal to 0.0050% of N and the balance Fe and impurities. The production technology process mainly including KR molten iron pretreatment, converter smelting, LF refining furnace smelting, continuous casting, controlled rolling and controlled cooling and heat preservation channel slow cooling is adopted, the sorbite rate of the product reaches 90% or above through the measures of Cr micro-combination, the stelmor cooling technology and the like, the requirements of the high strength and the drawing technology of the wire rod are met, and the product quality is improved. The problems that in the wire rod production process, due to the fact that abnormal structure martensite appears, the strength is high, and brittle failure is caused in the wire rod drawing process are solved.

The invention discloses a cultivation work ship with a ship body capable of being opened and closed, and relates to the technical field of cultivation work ships, the cultivation work ship comprises the ship body, a plurality of permeable nettings and a sealing assembly, a containing cavity is formed in the ship body, openings communicated with the containing cavity are formed in the two sides of the ship body, and the multiple permeable nettings divide the containing cavity into a plurality of cultivation areas; the sealing assembly is rotatably mounted to the hull for opening or sealing the opening. The water-permeable netting is arranged to divide the containing cavity into a plurality of culture areas, so that different types of fishes can be cultured, frequent water change between seawater and the plurality of culture areas can be achieved through the opening in the culture mode, the culture effect is guaranteed, automatic water change is achieved through the seawater, and the culture efficiency is improved. The breeding cost is reduced; the opening is sealed by driving the sealing assembly to rotate, so that the integrity of the appearance of the ship body is improved, the sailing resistance can be reduced, and the sailing speed is increased.

The invention discloses an infrared radiation intensity prediction method, device and system and a storage medium, and relates to the technical field of electric digital data processing. The method comprises the following steps: establishing an engine flow field grid model and performing grid division; acquiring test data of the engine, setting boundary conditions, and performing flow field simulation calculation to obtain a temperature field cloud picture; acquiring temperature field data, and performing infrared simulation calculation to obtain infrared radiation intensity data; constructing a training parameter sample of the BP neural grid model, training the BP neural grid model until a preset threshold value is met, and obtaining a trained BP neural grid model; and performing infrared radiation intensity prediction through the trained BP neural grid model. According to the embodiment of the invention, while the precision is ensured, the calculation amount is reduced, and the calculation efficiency is remarkably improved; stronger generalization ability is achieved, and the prediction accuracy under complex working conditions is improved; the coupling effect can be reflected more accurately; and the reliability and comprehensiveness of test verification are improved.

The utility model discloses a split mounting type filling retaining wall which comprises a wall body, the wall body is fixedly installed in a roadway, the wall body is built by a plurality of gabion nets in a lap joint mode, barren rocks can be loaded in each gabion net, the gabion nets are fixed in position through wall surrounding steel bars along the rock wall of the roadway, and the gabion nets are arranged in the roadway. By means of the filling retaining wall, construction is simple, complex construction processes are not needed, the form of the filling retaining wall is flexibly adjusted, the capacity of the whole filling retaining wall for resisting a filling body is improved, the filling retaining wall is matched with the initial filling height, the goaf height and the like, and the filling retaining wall can be constructed according to the actual site requirements. And retaining walls with different bearing capacities are constructed, so that the overall strength of the filling body is ensured, and the wall body is prevented from collapsing.

The invention provides a retaining wall integrated structure, and relates to the technical field of road retaining walls. The bottoms of the prefabricated stand columns are inserted into soil, the inner sides of the prefabricated stand columns make contact with the soil, the left ends and the right ends of the prefabricated stand columns are connected with the prefabricated retaining walls, the prefabricated retaining walls are connected with the two prefabricated stand columns, and the inner sides of the prefabricated retaining walls make contact with the soil. The prefabricated anchor block is buried in deep soil in a backfilling mode, and the top of the prefabricated anchor block is connected with a steel wire rope. The prefabricated retaining wall is designed to be in an arc shape, force is better transmitted to the left prefabricated stand column and the right prefabricated stand column, the deformation amplitude of the prefabricated retaining wall is reduced, the prefabricated stand columns and the prefabricated retaining wall are connected together in a sliding and inserting mode, connection is easier, more convenient and faster, the construction time is effectively shortened, and the construction difficulty is reduced. The problems that a retaining wall commonly used on a road at present is generally integrally poured and built by concrete, a series of pouring procedures are needed, the whole construction period is long, and the road construction progress is affected are solved.

The invention discloses a wind power blade structure with a segmented tail edge and a method, solves the problem that in the prior art, the width of a wind power blade cannot be increased due to transportation limitation, and has the beneficial effect that on the premise that the strength is guaranteed, segmented transportation can be achieved so that the width of the blade can be increased. Comprising a blade body and a blade trailing edge which are arranged in the chord direction of the blade, the blade body is provided with a first notch, the blade body is provided with a first trailing edge beam in the length direction of the blade body, the first trailing edge beam passes through the first notch, and a first web is arranged at the first notch of the blade body in the thickness direction of the blade body and supports the first trailing edge beam; a second notch is formed in one side of the blade rear edge, the shape of the second notch is matched with that of the first notch, a second rear edge beam is arranged in the length direction of the blade rear edge and passes through the second notch, and the first rear edge beam and the second rear edge beam can be bonded into a whole.

The invention relates to the technical field of silica gel sheets, in particular to a high-strength wear-resistant heat-conducting composition and a preparation method and application of a silica gel sheet. The invention discloses a high-strength wear-resistant heat-conducting composition which comprises the following components in parts by weight: 1-5 parts of methyl vinyl silicone rubber; 15 to 20 parts of vinyl silicone oil; 2-10 parts of white carbon black; 0.5-1 part of a first coupling agent; 50-70 parts of a heat conducting filler; 0.1 to 0.2 part of a chain extender; 5-10 parts of a cross-linking agent; 0.01 to 0.02 part of a catalyst; and 0.01 to 0.05 part of a polymerization inhibitor. According to the silica gel sheet provided by the invention, the binding force between the filler and the silica gel matrix is enhanced through the high heat conduction characteristic of the heat conduction filler powder and the treatment of the coupling agent, so that the overall heat conduction performance of the material is improved. Meanwhile, by controlling the particle size and the shape of the filler and adopting methods such as ball milling treatment, the mechanical property of the material is ensured, and the stable performance can be kept in long-time use.

The invention provides a zirconium boride / graphene complex-phase wear-resistant and high-temperature-resistant ceramic material and a preparation method thereof, and belongs to the technical field of ceramics. The preparation method comprises the following steps: pretreating graphene, preparing titanium dioxide / graphene microspheres, modifying the titanium dioxide / graphene microspheres, functionalizing the titanium dioxide / graphene microspheres, preparing a ceramic mixture, molding and sintering. The step of functionalizing the titanium dioxide / graphene microspheres comprises the following steps: putting the modified titanium dioxide / graphene microspheres into xylene, adding bisphenol A epoxy resin and triphenylphosphine, raising the temperature, carrying out stirring reaction, filtering out, washing, putting into N, N-dimethylformamide, uniformly stirring, adding gallic acid and p-toluenesulfonic acid, and carrying out ultrasonic treatment to obtain the titanium dioxide / graphene microspheres. Raising the temperature for reaction, filtering, washing and drying after the reaction is finished, so as to prepare functionalized titanium dioxide / graphene microspheres; the prepared ceramic material is high in strength, good in wear resistance and excellent in high temperature resistance.

The invention discloses a warp-knitting-like bonding net and a net roll structure, and belongs to the field of net knitting processing. According to the warp-knitting-like bonding net, the adopted warp yarn comprises the first yarn and the second yarn which are located on the same warp direction line, the weft yarn reciprocates between the warp yarn in the warp direction, the weft yarn is arranged between the first yarn and the second yarn, and the first yarn and the second yarn are compounded together on the two sides of the connecting point. According to the scheme, a warp winding structure does not exist, and more materials are saved under the condition that the strength is guaranteed; in addition, the weft yarn is clamped between the two pieces of yarn, the warp yarn is difficult to strip from the weft yarn, and damage is not prone to occurring.

The invention discloses a die-casting forming method of an aluminum alloy shell die casting, which relates to the technical field of forming processing of metal parts and comprises the following steps: selecting materials, melting and refining, carrying out die-casting forming, shaping and trimming, refining and machining, cleaning and decontaminating, and assembling. Through fine polishing treatment and preheating measures, the problem of film sticking at a sprue is remarkably relieved, effective feeding, slow injection and rapid injection are achieved, the speed of an injection punch of rapid injection is larger than 6 m / s so that the density and quality of a final casting can be guaranteed, a cavity is divided into different temperature zones in the injection direction, staged cooling is conducted, and the casting quality is improved. The mold is opened 19-21 seconds after the cavity is filled with the raw materials, it is ensured that the casting has enough strength, deformation or damage is avoided, the high-performance requirement of the aluminum alloy shell of the automobile air conditioner compressor can be met, the production efficiency and the product quality can be improved, and meanwhile the influence on the environment is reduced.

The utility model belongs to the field of parking space locks, and discloses a parking space lock which comprises a blocking piece, a locking piece and a locking piece. A driving unit; a transmission mechanism; a linear track; a substrate; when the driving unit drives the transmission part to move, the transmission part drives the moving part to slide along the linear rail and drives the connecting arm to slide along the linear rail and rotate relative to the moving part at the same time, so that the connecting arm drives the blocking part to turn over. When the blocking piece is subjected to external impact force in the open state, the blocking piece drives the connecting arm to move, the connecting arm drives the moving piece to slide relative to the linear rail, and the linear rail limits displacement of the moving piece in the direction perpendicular to the sliding direction of the moving piece. Power transmission is achieved through the transmission mechanism, the linear rail and the connecting arm are arranged independently, and the strength of the connecting arm and the transmission stability are guaranteed while the connecting arm moves; the linear track can assist the moving part in linear motion and can offset external impact force, so that the moving part is protected and prevented from being deformed and damaged; all the components can be integrated on the base plate, and therefore a user can conveniently install the parking space lock.

The invention provides a hot-rolled seamless steel pipe and a wall thickness controllable processing technology thereof, and aims to solve the problem that the wall thickness of a steel pipe is difficult to accurately control in the prior art. Real-time monitoring and control over the wall thickness of the steel pipe are achieved, so that the wall thickness precision is remarkably improved, raw material components of the seamless steel pipe comprise C, Si, Mn, P, S, Cr, Mo, Ni and Fe, the wall thickness range of the seamless steel pipe is 5-20 mm, and the preparation technology comprises the steps of raw material proportioning, vacuum smelting, mold cylinder preheating and coating treatment, wall thickness laser measurement, rotating speed regulation and control forming, annealing, forced cooling treatment and the like. Through 300-600 times of high-frequency wall thickness measurement per second, the wall thickness uniformity and precision of the steel pipe in the whole production process are ensured in combination with rotating speed regulation and forced cooling, and finally the product quality and economic benefits are improved.