79results about How to "Consistent mechanical properties" patented technology

The invention discloses a multi-layer high gradient insulator for a high-voltage pulse power supply and a manufacturing method thereof. The multi-layer high gradient insulator is characterized in that thin conductive layers are regularly embedded in an insulator body made of an insulated material, the side surface of the insulator, which is in a certain depth, is formed by an insulated material layer and a conductive material layer, and the interior of the insulator is formed by a single insulated material. According to the invention, a conductive array is embedded in the side surface of the insulator body, the secondary electron emitting characteristic of the surface of the insulator and the surface load charge accumulation are restrained, the vacuum surface flashover characteristic of the insulator body is improved, the surface impact voltage of the insulator body is improved, the problem that the insulated material layer is not matched with the mechanical and thermal performance of the conductive material layer is solved, and the process difficulty and cost for manufacturing the multi-layer high gradient insulator are remarkably lowered.

The invention discloses a heat-treatment cooling process for a train wheel, and belongs to the technical field of heat-treatment cooling for train wheels. The heat-treatment cooling process for the train wheel comprises the steps that first, the whole wheel is heated to be completely austenitized; second, the wheel is transferred onto a quenching table and is made to rotate, a gas-mist two-phase flow with the pressure being increased step by step is sprayed onto a wheel tread; and third, the whole wheel is placed into a tempering furnace for heat preservation and is finally taken out to be air-cooled, wherein the gas-mist two-phase flow with the pressure being increased step by step is sprayed onto the wheel tread sequentially through three stages, the rotation speeds V1, V2 and V3 of thewheel, the water pressures P1, P2 and P3 and the quenching times T1, T2 and T3 in the three stages are controlled, and the numbers of started nozzles which are distributed at equal intervals in the circumferential direction of the wheels in the three stages are respectively M, 2M and 3M. By adoption of the heat-treatment cooling process for the train wheel, the capacity to cool the interior of a rim can be improved, the cooling speed is kept balanced and consistent from the wheel tread to the deep interior of the rim, the structure of the whole cross section of the rim is optimized, and accordingly, the radial hardness gradient of the rim is greatly reduced, and the mechanical property and usability of the wheel are greatly improved.

The invention discloses a mechanical behavior device for simulating a cigarette ash dropping process by a person, which is characterized by comprising a cigarette clamping mechanism, a cigarette lighting device located right in front of the cigarette clamping mechanism, a cigarette striking device located at one side of the cigarette clamping mechanism and an optical sensing device located at the other side of the cigarette clamping mechanism. The device of the invention has the advantages that through researching on the mechanical behavior when a person drops the cigarette ash, high consistency between the mechanical behavior when a mechanical device drops the cigarette ash and the actual mechanical behavior can be ensured; and the optical sensing device monitors the surface temperature of a burning cone during a cigarette smoking process, the cigarette end dropping phenomenon is recorded in real time through temperature detection, and automation and intelligence of the striking device are improved.

Embodiments of the present invention include composite compositions extrusion compounded together comprising a polymer, an amount of nanotubes, and an amount of finely milled carbon fiber having an aspect ratio greater than 1 and less than about 5. The resulting composite materials allow for high carbon loading levels with improved tribological properties including coefficient of friction and wear rates, provides uniform surface resistance with minimal processing sensitivity, retains rheological properties similar to the base resin, and provides isotropic shrink and a reduced coefficient of thermal expansion leading to minimal warp. In general, various articles can be formed that take advantage of the properties of the composite materials incorporating a polymer, carbon nanotubes and finely milled carbon fiber.

{0><}0{>The invention relates to the field of preparation of cell ion exchange membranes and particularly relates to a low-temperature alkaline fuel cell anion exchange membrane and a preparation method thereof. <0}{0><}0{>The preparation method comprises the following steps: preparing a high molecular polymer into a membrane; immerging the membrane into staining solution containing a quaternary ammonium salt cation reactive dye, thereby obtaining a dyed membrane; and soaping the dyed membrane, washing the membrane with water and drying the membrane; performing aldolization on the dried membrane with multi-aldehyde group, wherein the high molecular polymer is any one of chitosan and polyvinyl alcohol. <0}{0><}0{>According to the method, a dye dyeing technology is introduced into the preparation method of the fuel cell alkaline membrane; the chitosan or polyvinyl alcohol is selected as a substrate, and the cation reactive dye serves as a load body, cation groups are introduced onto a macromolecule main chain under a relatively mild reaction condition, so that OH- conduction is effectively performed; then <0}{0><}0{>aldolization is performed, so that the finally prepared membrane is excellent in conductivity, mechanical property and thermostability.

The invention provides a repairable carbon fiber cloth reinforced epoxy resin plate and preparation and repairing methods thereof; the repairable carbon fiber cloth reinforced epoxy resin plate is prepared from, by weight, 100 parts of epoxy resin, 5-20 parts of curing agent A, 10-40 parts of curing agent B, 0.1-5 parts of an accelerant, and at least one layer of carbon fiber cloth; the curing agent A is selected from one or more of acid anhydride and carboxylic acid curing agents, the curing agent B is selected from one or more of curing agents other than acid anhydride and carboxylic acid ones, and the accelerant is selected from one or more of calcium salts, zinc salts and iron salts. The repairable carbon fiber cloth reinforced epoxy resin plate of the invention has the advantages of common carbon fiber cloth reinforced epoxy resin plates, such as high rigidity, high hardness, high tolerance to temperatures, low flammability and good article size stability, is repairable, allows damage in use to be repaired easily, and has post-repairing mechanical properties basically identical with initial mechanical properties of the resin plate, and the repairing process is simple and low in cost.

The invention belongs to the field of armor materials, and particularly relates to a negative Poisson's ratio cell lattice type ceramic skeleton reinforced composite material and a manufacturing method. The composite material comprises a ceramic framework reinforcing phase and a metal matrix phase, wherein the ceramic framework reinforcing phase is formed by arraying negative Poisson's ratio cellsin a three-dimensional space; the negative Poisson's ratio cells are formed by vertically nesting and connecting two double-arrow unit structures at an inner concave end point; a metal matrix infiltrates and completely fills a ceramic framework through a melt infiltration process; and the periodic communication structure composite material with a macroscopic negative Poisson's ratio effect is formed after the metal matrix is solidified. According to the composite material, the problems that granular or fibrous ceramics are unevenly distributed in a traditional ceramic reinforced metal matrixcomposite material, the ceramic reinforced phase is prone to displacement in a projectile penetration process, and the difference of the penetration resistance in all directions is large are overcome,the composite material has stronger macroscopically uniform fracture resistance, and the local density of a target plate loading area is increased under the negative Poisson's ratio effect to furtherimprove the bulletproof performance.

The invention discloses a ratproof and termiteproof material, which comprises the following components in percentage by weight: 80 to 85 percent of polypropylene, 8 to 20 percent of glass fiber, 0.6 to 2 percent of capsaicine, 0.8 to 2 percent of dihydrocapsaicine and 1 to 2.5 percent of cypermethrin. Because the capsaicine, the dihydrocapsaicine and the cypermethrin can generate strong odor irritating both olfactory sensation and taste sensation of mice and insects, the ratproof and termiteproof material can effectively prevent the bite and encroachment of mice and termites and is particularly suitable to manufacture civil engineering members used outdoors for a long period of time such as filling sacks and fixing buckles used in barrier building; a built barrier has less potential threat and high safety factor and passes experimental verification; and the mechanical property of the ratproof and termiteproof material is identical to that of ordinary polypropylene materials and does not influence the quality of products manufactured by the material.

The invention relates to an entire filling plastic coating steel strand that includes a core thread and plural side track. The feature is that it is coated a HDPE plastic anticorrosion insulation, and HDPE plastic anticorrosion layer is also filled in the clearance between core thread and side track. It has good anticorrosion capability, and has the same mechanical properties and utilization property as normal PC steel strand.

The invention particularly relates to a magnesium alloy plate grain refining controlled edge crack rolling method, and belongs to the technical field of metal material processing. The method aims to solve the problems that in existing magnesium alloy plate rolling, the yield is low caused by edge cracks; the production cost is greatly increased due to the fact that the damage of a rolling mill anda lining plate is large; and the grain refining effect in a plate is not obvious. The rolling method comprises the steps of prefabricating rolling direction edge convexity, asymmetrical cross rollingprefabricating a convexity plate, large-pressure lower continuous axial rolling, cross broad siding finish rolling and the like. The invention discloses a rolling method for effectively weakening cracks at the edge of a magnesium alloy plate and refining grains. The magnesium alloy plate grain refining controlled edge crack rolling method carries out composite optimization on broadside rolling, asymmetrical rolling, prefabricating convexity rolling and cross rolling methods which are applied to a magnesium alloy rolling forming process widely. The method provides technical support for improving the yield, refining grains and promoting magnesium alloy plate large-scale application, and has wide application prospects.

The invention discloses an on-line winding device for the waste edge for aluminum processing equipment. A mandrel of a winding shaft is hinged to a rack. A bidirectional circulating lead screw is characterized in that two thread lines of the same specification and opposite in screwing directions are correspondingly arranged in the middle of a guide shaft. A sliding block is fixed to a bottom face of a frame type guide frame, and a hole with the diameter matched with the maximum outer diameter of the bidirectional circulating lead screw is formed in the sliding block. A circular-arc guide block is fixedly arranged on the upper end wall of the hole. When the bidirectional circulating lead screw is sleeved with the sliding block, the circular-arc guide block is embedded into a threaded groove in the bidirectional circulating lead screw. An output chain wheel of a torque motor is connected with a drive chain wheel A of the winding shaft through a chain. A middle chain wheel is arranged on the winding shaft. The middle chain wheel is arranged on a drive chain wheel B on the bidirectional circulating lead screw through the chain in a connected manner. By means of the on-line winding device for the waste edge for the aluminum processing equipment, the waste edge is evenly wound around the winding shaft, it is guaranteed that the tension in the waste edge winding process is constant, the edge shearing quality of finished product strips is guaranteed, the yield is increased, the waste edge is wound on line, and the production efficiency is improved.

The invention relates to the field of building construction, in particular to a constructional column chiseling-free construction method beneficial to controlling the top sealing quality of a constructional column. The method includes the following steps: firstly, wall building, wherein during wall building, mould bricks are built together with a wall body at a constructional column design position; secondly, pouring assembly installation, wherein when the wall body in the first step is built to the top, a gap for pouring constructional column concrete is reserved at the top of the constructional column design position, and a pouring assembly for pouring the concrete is arranged at the gap position of the wall body; thirdly, constructional column pouring, wherein the concrete is poured into a construction column pouring cavity through the pouring assembly, after concrete pouring is completed, the gap at the top of the constructional column is sealed through a sealing plate, a pouring bucket of the pouring assembly is detached, and concrete in the pouring bucket is recycled; and fourthly, maintenance. The constructional column chiseling-free construction method firstly simplifies the construction, greatly shortens the construction period and greatly improves the surface flatness of the constructional column.

The invention provides a hot press molding method for a spherical head made of 10CrNi3MoV steel and belongs to the field of machining and manufacturing methods of end sockets of sealing pressure structures of ship bathyscaphs. The problems that an existing spherical head cold machining and forming process is high in cost and machining stress is difficult to eliminate are solved, so that cost is reduced, and the service life of the spherical head made of the 10CrNi3MoV steel is prolonged. The method includes the round plate heating step, the die forming step, the quenching treatment step and the tempering treatment step. By the adoption of the method, the requirements for pressing die and stamping equipment are lowered, stamping forming is easy to control, quality is better, machining stress does not exist, it can be guaranteed that the mechanical performance of the spherical head made of the 10CrNi3MoV steel is identical to that of the 10CrNi3MoV steel plate, and therefore it is guaranteed that the service life of the spherical head made of the 10CrNi3MoV steel is identical to that of a ship.

The invention discloses a method for manufacturing a hammer shaft of a single-stage hammer crusher. The method comprises the following steps of: a, selecting hot-rolled 48MnV round steel; b, performing normalizing treatment on the round steel at the temperature of between 930 and 940 DEG C, wherein the soaking time is 70 to 75 minutes; c, cooling the round steel by adopting wind cooling, controlling the cooling speed which is controlled to be between 30 and 40 DEG C per minute at the temperature of over 500 DEG C, and reducing the round steel to the room temperature through air cooling when the temperature is below 500 DEG C; d, performing cutting machine-shaping; and e, performing surface induction hardening and tempering. A great number of material tests summarize that the 48MnV is used as a raw material, and by implementing a great number of tests for summarization and a unique manufacturing process, the method, which is more economical and reasonable, for manufacturing the hammer shaft of the single-stage hammer crusher is obtained, and the method ensures that the mechanical properties of core parts and surfaces of components are more accordant, and the overall comprehensive performance of the components is better.

An apparatus and method is disclosed for simultaneously electroplating at least two parts in a series electrical configuration in an electroplating system using a shared electrolyte with excellent consistency in thickness profiles, coating weights and coating microstructure. Parts in high volume and at low capital and operating cost are produced as coatings or in free-standing form.

The invention discloses an isotropous rolling method for an ion-based high-temperature alloy rectangular ring part. The isotropous rolling method comprises the following steps: firstly, heating an iron-based high temperature alloy rod to a forging temperature, and carrying out upsetting, punching and pre-rolling on the iron-based high temperature alloy rod to prepare rectangular ring blank; filling the rectangular ring blank into ring rolling machine, lifting a tapered roller by a height h being 5mm-10mm for tilting the rectangular ring blank; then, rolling and shaping the rectangular ring blank to obtain the ion-based high-temperature alloy rectangular ring part. According to the method, by changing the flow direction of materials during rolling, isotropous mechanical properties of the rectangular ring part are kept consistent, so that the comprehensive mechanical properties of the rectangular ring part are improved. The method is used for producing the isotropous ion-based high-temperature alloy rectangular ring part.

The invention discloses a lost foam casting mold for a cutter tooth holder. The lost foam casting mold for the cutter tooth holder comprises a cutter tooth holder white mold and a casting system whitemold, sand box casting is changed into lost foam casting, and a sprue and a plurality of groups of ingates are arranged in a roller, so that molten metal is cast in the cutter tooth holder white moldfrom bottom to top; the first ingate, the second ingate and the third ingate in the ingates convey the molten metal to the roller and promote the molten metal to form local entrainment scouring in the roller at the same time, so that impurities such as bubbles and dross remaining in the roller, a first inverted teeth and a second inverted teeth are washed away, the pouring quality is greatly improved, the production cost is reduced, a first riser and a second riser are correspondingly arranged at the joints of the end part of the roller and the end parts of the first inverted tooth and the second inverted tooth, so that molten metal with impurities is timely discharged, the pouring quality of a cutter tooth holder is greatly improved, the internal structure distribution is uniform, the compactness is good, the mechanical properties of the two sides are consistent, and the service life of the cutter tooth holder is remarkably prolonged.

The invention discloses a butt joint method for long powder metallurgy compressed billets. Materials are prefabricated into at least two compressed billets, and the compression coefficient of the compressed billets ranges from 1.25 to 1.35; butt joint faces of the compressed billets are subjected to roughening; and the butt joint faces of the compressed billets are evenly coated with powder with the same brand number with the compressed billets, then a soft film is used for wrapping every two adjacent compressed billets for locating, afterwards, the compressed billets are put in a cold isostatic press to be subjected to pressurizing and pressure maintaining, and the compression coefficient is lowered to be smaller than 1.21, so that the compressed billets are tightly combined. The butt joint method has the advantages that an original long compressed billet is divided into several small compressed billets which are compressed through molds, but the compression coefficient is not directly settled in one step, then the powder with the same brand number with the compressed billets is laid between every two adjacent compressed billets for cold isostatic pressing, and therefore the two compressed billets are bonded together to form a long compressed billet, and the design requirements are met; according to the method, existing short molds can be fully utilized, the compressed billet obtained through the butt joint method is consistent with a one-time formed compressed billet in mechanical property, and the consistent density of the whole compressed billet also can be guaranteed.

The invention discloses a device and a process for producing and forming OV type high-gloss films. The device comprises a rack, wherein an elastic roller, a flat die head, a mirror roller, a deviation correcting roller and a cooling roller are arranged on the rack; the elastic roller is mounted on one side of the mirror roller; the cooling roller is mounted on the other side of the mirror surface; the elastic roller and the mirror roller are mounted in a manner of infinitely close to each other; the flat die head is mounted on the upper part of the joint of the elastic roller and the mirror surface; the deviation correcting roller is mounted on the rack under the mirror roller; a stainless steel strip is mounted among the elastic roller, the mirror roller, the cooling roller and the deviation correcting roller; the mirror roller is connected with a servo motor. By virtue of the device and the process for producing and forming OV type high-gloss films, the problems of transparency and thickness uniformity of the films are solved; and the problem of the gloss of the surfaces of the films is solved.

The invention discloses a triaxial test method for measuring the shear strength index of a rammed earth wall, which comprises the following steps: 1) preparing a soil sample in combination with the manufacturing process of the rammed earth wall in engineering practice, preparing materials required by the soil sample and the proportion of the materials, and ensuring that the moisture content requirement of the soil sample obtained after stirring is consistent with the manufacturing process of the rammed earth wall in engineering practice; 2) tamping a soil sample in the sample striking cylinderaccording to the construction process requirement of the rammed earth wall to obtain a cylindrical sample; 3) applying confining pressure to the cylindrical sample; shearing the cylindrical sample atan axial strain of which the shearing rate is 0.5-1% per minute until the cylindrical sample is subjected to shear failure, and recording and storing data; and 4) drawing an envelope curve of the damage stress circle under different confining pressures so as to obtain the shear strength parameter cohesive force C and the internal friction angle of the cylindrical sample. The method can effectively and accurately determine the shear strength index of the rammed earth test piece.