39results about How to "To achieve the effect of lightweight" patented technology

The invention discloses a variable-thickness-gradient negative poisson ratio automobile buffering and energy-absorbing structure and an optimization method thereof. The automobile buffering and energy-absorbing structure is formed by a variable-thickness-gradient negative poisson ratio structure, and the negative poisson ratio structure is formed by three-dimensional inwardly-sunken hexagon unit-cells in an array mode; in the longitudinal direction of an automobile, and three layers of unit-cells are distributed, the thickness gradients among the layers are different; and the variable-thickness-gradient negative poisson ratio automobile buffering and energy-absorbing structure is located between a bumper outer skin and a bumper cross beam, and mounted on the automobile bumper cross beam through mounting clamping holes, and mainly when the automobile is collided, the variable-thickness-gradient negative poisson ratio automobile buffering and energy-absorbing structure plays the role of energy absorbing and buffering. The invention further discloses a design method of the automobile buffering and energy-absorbing structure of the variable-thickness-gradient negative poisson ratio structure, the variable-thickness-gradient distribution character of the negative poisson ratio structure can be designed according to design objectives and requirements through a multi-subject and multi-objective cooperative optimization method, and the positive effects on protection to legs of goers outside the automobile and the crashworthiness of an automobile body are achieved.

The invention discloses a method for lightening of a BIM. The method comprises the steps that information data is extracted; in BIM engineering modeling under an existing system, model information data is extracted from an original BIM through use of legal and compliant technical manners; with regard to all the extracted component lists as well as race information data used by each component list, math methods of linear algebra and space analytic geometry will be used to analyze components of the same type in the BIM; and component template data formed by a reusable technologies and global coordinate system matrix data in the BIM are obtained through analysis. According to the invention, the ultra-large data size of the BIM is reduced; bottlenecks of the BIM in storage and transfer are solved; and the BIM is lightened.

The invention discloses a wave type carbon felt electromagnetic shielding structural body and a preparation method thereof. The structural body is combined by adopting multi-layer wave type carbon felts according to certain angles. The multi-layer wave type carbon felts are adhesively connected by adopting adhesives, the wave type carbon felts adopt resin as base bodies, and carbon fiber felts arefunctional bodies. The electromagnetic shielding structural body has the large internal surface area, after electromagnetic waves transmit the surface layer carbon felts, the hook faces of the innerlayer carbon felts can perform repeated reflection, by mans of the multiple electromagnetic wave scattering effect of carbon fiber inside the carbon felts, and therefore the electromagnetic wave consumption and absorption of the carbon felt structural body are remarkably enhanced, the electromagnetic shielding effect is improved, the surface layer wave type carbon felt can remarkably lower the reflecting effect for emission electromagnetic waves, the influence of electromagnetic waves for peripherals and workers is lowered, and the invisibility effect can be achieved in some application fields.

The invention discloses a forming method for an aluminum alloy hub, which comprises the following forming steps: casting, calendering, heat treating, machining, testing, coating, and packing and storing. According to the forming method, feeding for a rib tail arc angle and a mounting face is improved during foundry manufacturing; the castability is good; the strength is effectively improved; and the thickness of a finished rim is thinner than that of a normal rim, so as to achieve the effect that the hub is light in weight, and is convenient to use and transport.

The invention discloses a three-dimensional model lightweight method based on unit reuse in a three-dimensional scene. The method specifically comprises steps that: attitude alignment preprocessing on all the model units is carried out, and the preprocessing comprises translation-independent processing, rotation-independent processing and zoom-independent processing; after the preprocessing, each characteristic descriptor of each unit under the alignment attitude is extracted, matching and classification for all the model units are carried out through a matching method, and the model units which can be reused are found out; after the model units which can be reused are found out, the redundant repeated units are removed to realize an effect of lightweight model data. The method is employed, whether two model units are same is determined by comparing how many same numbers do voxel states of same indexes have, and lightweight time and manpower cost are obviously reduced compared with other methods.

The invention discloses an integral wheel stamping and spinning manufacturing method. The method comprises the following steps that (1) stamping is carried out, specifically, stamping is carried out on a blank so as to form a spoke part; (2) pre-spinning is carried out on a rim, specifically, the blank is clamped by adopting an upper pre-spinning mandrel and a lower pre-spinning mandrel, the upperpre-spinning mandrel and the lower pre-spinning mandrel drive the blank to rotate synchronously, and meanwhile, lateral extrusion force is applied to the outer edge of the blank by adopting an autorotation and radial feed type spinning wheel so as to form the outer edge of the blank into the V-shaped rim with an outward opening; (3) spinning forming is carried out on the rim, specifically, the blank is clamped by adopting an upper rim forming mandrel and a lower rim forming mandrel, the upper rim forming mandrel and the lower rim forming mandrel drive the blank to synchronously rotate, and meanwhile, pressure is applied to the two sides of the V-shaped rim by adopting an autorotation and radial feed type forming spinning wheel so as to enable the two sides of the V-shaped rim to be attached to the upper rim forming mandrel and the lower rim forming mandrel respectively; and (4) spinning is carried out on a wheel flange.

The invention discloses an aluminum alloy honeycomb plate. The aluminum alloy honeycomb plate comprises a first aluminum alloy layer, a first adhesive layer, a first honeycomb core layer, a second adhesive layer and a second aluminum alloy layer. The above layers are orderly stacked. The first aluminum alloy layer and/or the second aluminum alloy layer is one of an aluminum-copper alloy, an aluminum-silicon alloy and an aluminum-zinc alloy. The aluminum alloy honeycomb plate has high strength and low weight.

The invention discloses a polyimide foam composite material which is characterized in that raw materials of the polyimide foam composite material comprise glass beads and graphene sheets. The density of the material is 20-50g/cm<3>, the temperature range span with the damping coefficient of more than or equal to 0.3 is 250 DEG C, the polyimide foam composite material is a novel high-efficiency acoustic and heat insulation light material which is low in density, high in heat insulation property, safe and reliable to use and convenient in construction, and the application defects and potential safety hazard of existing materials are overcome. According to the polyimide high-efficiency acoustic and heat insulation light material, the operating safety of ships and naval vessels, aircrafts and high speed trains is improved, and the effect of lightening the weight is achieved, so that the navigational speed is improved, the fuel is saved, and the carrying capacity is improved.

The invention discloses a thinned belted layer component for a radial tire. The thinned belted layer component comprises a belted layer framework and a rubber coating layer, wherein the framework is made of a high-modulus cord thread material which comprises steel wire cord threads or fiber cord threads, and one or more cord thread layers are arranged; the rubber coating layer is made of natural rubber or a blend of the natural rubber and synthetic rubber; cord thread expansion, calendaring and rubber coating are carried out according to a radial tire belted layer production process to manufacture a thinned belted layer piece with a standard width, and the rubber layer thickness of the component is thinned by 3-10 percent compared with that of a component produced by a traditional process; and then, the thinned belted layer piece is radiated and prevulcanized by adopting an electronic accelerator radiation device to prepare a thinned belted layer component. The thinned belted layer component has a thinned belted layer structure and has the advantages of low rubber raw material dosage, high Green strength of the coated rubber, good rubber layer uniformity and strong structure stability, so that the performance and the quality of a manufactured tire is greatly improved, and the thinned belted layer component is suitable for preparing a high-performance radial tire.

The invention discloses a chemical fiber cotton fiber filling material and a manufacturing method thereof. The chemical fiber cotton fiber filling material replaces down feather to fill down feather products, and comprises at least 70 to 99 wt% of chemical fiber material and 1 to 30 wt% of natural fiber material. The chemical fiber material comprises at least one or more chemical fiber resin cotton of the above specification, the natural fiber material is a natural fiber made from a natural down material, and the fiber length of the natural fiber material is less than 3 cm.

The invention provides a headset upper cover structure having a function of forcing regulation, which is arranged between a headset set and a handle upright pipe. The structure comprises a base which is provided with reversely screwed first and second threaded parts along coaxial line along the internal edge, a first whirling element which is threaded on the first threaded part and is capable of generating radial displacement in the spiral way so as to resist one end face thereof on the handle upright pipe, and a second whirling element which is threaded on the second threaded part and is capable of generating radial displacement in the spiral way so as to resist one end face thereof on the headset. When the base is rotated, the first and second whirling elements will synchronously generate corresponding radial displacement so as to change the distance between the end faces for performing the function of forcing regulation.

The invention discloses a TV stand. The TV stand comprises a pedestal, a support column and a fixed arm, the support column is mounted on the pedestal and perpendicularly connected with the pedestal,the support column is provided with a fixed arm mounting hole, and the fixed arm passes through the fixed arm mounting hole and parallel to the pedestal. According to the TV stand provided by the invention, by optimizing a structure of the TV stand, an effect of light weight is realized while balanced strength of the TV stand is guaranteed, in a production process, an aim of saving materials, saving labors, saving time and saving money is realized, meanwhile, the TV stand also has relatively higher adaptability, is suitable for mounting of various TVs in different size, split type design of the TV stand is convenient for storage, and in a transportation or storage process, less space is occupied.

A prestress carbon fiber aerial ladder truck cantilever crane mainly comprises vertical ladder columns, ladder steps, struts and lateral oblique beams, wherein the vertical ladder columns are connected with the lateral oblique beams; the lateral oblique beams are connected with the struts; the struts have the load-bearing effect; the left strut and the right strut are connected with each other by the ladder steps; and a worker can walk on the cantilever crane through the ladder steps. The structural style of cross sections of the struts is improved, carbon fiber materials are pretreated so that the carbon fiber materials have the prestress effect, and then the prestressed carbon fiber materials are connected with the struts of the cantilever crane. The invention provides an aerial ladder truck firefighting cantilever crane structure, the cross sections of the struts of the cantilever crane have novel C-shaped structures, and two sections of the cantilever crane are combined in an inserted mode. In addition, the carbon fiber materials are tensioned in advance, the cross sections of the struts of the cantilever crane have the novel C-shaped structures, and inner lower sides of the struts and the prestressed carbon fiber materials are anchored. The novel cantilever crane is subjected to a reverse prestress effect when not working; stress and deformation conditions of the cantilever crane can be improved effectively when the cantilever crane works, and therefore, the prestress carbon fiber aerial ladder truck cantilever crane is high in efficiency, good in performance and high in safety.

The invention discloses a large anchor and mooring machine pump station lightweight composite general valve group, which comprises two groups of control oil ways arranged in parallel, and each control oil way is composed of a general valve block, a first one-way valve, a first overflow valve, an electromagnetic directional valve, a second overflow valve and a second one-way valve which are connected in sequence; the electromagnetic directional valve is a two-position three-way electromagnetic valve and is inserted into the general valve block through threads, and the first one-way valve, the second one-way valve, the first overflow valve and the second overflow valve are connected with the general valve block through pipe joints and threads. The universality and interchangeability are greatly enhanced, meanwhile, the weight and the size of the product are reduced by about one third through the modularized and integrated optimization design, the light weight effect is achieved, and installation and use are more convenient. Due to the fact that the pipe hole of the valve block is optimized, noise and vibration are reduced.

The invention discloses a rotary positioning mechanism, an armrest frame with a rotatable armrest seat, and a chair. The rotary positioning mechanism is suitable for being mounted on a chair armrest, and the chair armrest is provided with a supporting rod and the armrest seat capable of rotating relative to the supporting rod. The rotary positioning mechanism comprises a fixing unit and a rotating unit. The fixing unit comprises a fixing plate, an elastic ring piece and a joint block. The fixing plate is provided with two arc grooves. The elastic ring sheet is arranged between the arc grooves and is provided with a plurality of arc concave parts. A plurality of joint concave surfaces are formed on the joint block. The rotating unit rotates along with the armrest seat and comprises a linkage plate and a pushing piece. The linkage plate is provided with two rotating columns extending to the arc grooves respectively, and each rotating column is used for being in friction joint with one arc concave part. The pushing piece can be jointed with one of the joint concave surfaces in an elastic pushing manner. The armrest frame with the rotatable armrest seat and the chair comprise the rotary positioning mechanism.

The invention discloses a bee keeping bag. The upper part of a central bearing part is used for hoisting and hanging and can be hung at positions such as branches; the at least three fixed spleen bodies are positioned and mounted on the central bearing part, the fixed spleen bodies are made of hard materials, and each fixed spleen body radiates and extends towards the periphery in the radial direction with the central bearing part as the center to form a supporting framework to play a supporting role; the flexible deformable bag body is arranged on the periphery of the supporting framework formed by spleen fixing in a covering mode and surrounds the outside to achieve the protection effects of wind prevention, heat preservation and the like; the bag body surrounds to form a hollow bee breeding space, the top end of the bag body is closed, and the bottom end of the bag body is open for bees to enter and exit. A traditional hard wood beehive is replaced with the modular assembly type structure, the bag body can be made of various materials in a mixed mode, the requirement of bees for the nesting environment is better met, the overall mass can be effectively reduced, the light weight effect is achieved, the material cost is reduced, and the workload of outdoor beehive arrangement is reduced.

A pair of lightweight intelligent glasses comprises an intelligent glasses body and a mobile device, the intelligent glasses body is provided with a glasses end transmission module, the glasses end transmission module comprises a glasses end antenna and a glasses end wireless transceiver module, and the glasses end antenna is a millimeter wave antenna; the mobile device is provided with a mobile end transmission module, the mobile end transmission module comprises a mobile end antenna and a mobile end wireless transceiver module, the mobile end antenna is a millimeter wave antenna, the mobile device and the intelligent glasses body are in wireless electric connection through the mobile end transmission module and the glasses end transmission module, and the data transmission between the intelligent glasses body and the mobile device is carried out by the mobile end transmission module and the glasses end transmission module through radio waves above a millimeter wave level.

The invention provides a fixing assembly of a pumping module and a laser. The fixing assembly comprises a shell, a radiator, a refrigerator and a fan assembly. A resonant cavity and a mounting cavityare defined by the shell, and a flange for separating the resonant cavity from the mounting cavity is arranged on the inner wall of the shell. The radiator is located in the mounting cavity. Part of the radiator abuts against the flange, and the end, facing the resonant cavity, of the radiator is connected with the pumping module. The refrigerator is located between the radiator and the pumping module. The fan assembly is connected with the shell, and the end, facing the resonant cavity, of the fan assembly abuts against the end, away from the resonant cavity, of the radiator. According to thefixing assembly of the pumping module, the radiator is fixed and limited through the fan assembly and the flange of the shell; the problems that due to the fact that the radiator is fixed to the shell through screws, mechanical deformation happens to the shell, a resonant cavity is detuned, and laser output energy is reduced can be avoided; and moreover, the fixing assembly is simple in structureand convenient to assemble.

The invention belongs to the field of production and manufacturing of plastic cups made of SNA materials, and relates to a bubble cup and a preparation method thereof. A small amount of polyhydroxy acid sodium salt and sodium bicarbonate powdery mixed foaming agent are added into SNA resin, the bubble cup with the bubble density being 17-21/cm<3>, the bubble diameter being 0.9-1.5 mm and the bubble cup wall thickness being 2.6-2.8 mm is obtained through screw extrusion, injection molding, forming, cooling and mold opening, bubbles are distributed evenly and beautifully, the effect of light weight of the cup body is achieved, the consumption of raw materials is reduced; the production cost is greatly reduced; the bubble cup prepared by taking the SNA resin as the main raw material has good strength and temperature resistance, the preparation method is simple, the raw material cost is low, and the bubble cup is very suitable for large-scale industrial production.

The invention discloses a multi-channel surface-mounted T/R assembly in the field of radio frequency microwave assemblies, which comprises a substrate, the upper surface of the substrate is fixedly connected with a metal ring frame, and the upper part of the metal ring frame is fixedly connected with a cover plate; the upper surface of the substrate is also provided with a plurality of grooves which are regularly distributed, radio frequency channels are arranged in the grooves, the radio frequency channels are electromagnetically isolated by partition walls among the grooves, and the partition walls and the substrate are made of the same material; an inner cavity is formed in the partition wall, and a microwave transmission line is arranged in the inner cavity; and a lumped circuit is further arranged on the substrate, one end of each radio frequency channel is connected to an antenna port of the T/R assembly, the other end of each radio frequency channel is connected to a branch port of the lumped circuit through a microwave transmission line, the electrical length of each radio frequency channel is equal to that of the microwave transmission line of the lumped circuit, and a total port of the lumped circuit is connected to a lumped port of the T/R assembly through a total port transmission line. According to the invention, a multi-channel comprehensive integrated structure is adopted, the usage amount of metal materials is reduced, the internal space of the T/R assembly is fully utilized, and the effects of miniaturization and light weight are achieved.

The invention discloses a lightweight composite automobile body plate for automobile impact buffering and energy absorption, and belongs to the technical field of automobile body plates. The lightweight composite automobile body plate comprises layered fiber reinforced composite materials on the two sides and a corrugated metal component arranged in the center, and the layered fiber reinforced composite materials on the two sides are connected with the corrugated metal component in the center through an adhesive or a fastener. According to the lightweight composite vehicle body plate disclosed by the invention, the defects of brittle fracture of a traditional fiber reinforced composite material and overlarge plastic deformation of a traditional metal plate are overcome; when being impacted, the lightweight composite vehicle body plate is not easy to deform; the synergistic plastic deformation energy absorption capacity of the layered fiber reinforced composite materials on the two sides and the corrugated metal component in the center can be utilized to a greater extent, and the lightweight composite automobile body plate has more advantages than an aluminum honeycomb structure in vehicle body board application, so that the lightweight composite automobile body plate has better physical properties such as buffering, shock absorption and energy absorption than a traditional groove-shaped corrugated board.