117 results about "Latticework" patented technology

The invention belongs to the technical field of computer aided design and structural design, and discloses a multi-scale lattice structure and a design method thereof. The design method comprises the following steps: S1, designing a cubic unit cell with eight symmetrically distributed corner nodes according to a cubic lattice structure; s2, all the lattice unit cells are zoomed, one part of the lattice unit cells are zoomed into small lattice unit cells with the size being half of the original size, and the other part of the lattice unit cells are large lattice unit cells with the original size reserved; s3, in the macroscopic lattice structure, arranging the position relation of the small lattice unit cells and the large lattice unit cells; and S4, through a computer aided design method, adjusting the macroscopic lattice structure by adopting a large and small lattice unit cell connection mode based on rod diameter transition. A multi-scale large and small lattice unit cell arrangement mode is introduced into the lattice structure, so that the lattice structure has better mechanical performance under the same compression load.

The invention discloses a TPMS (Tire Pressure Monitor System) lattice design method, a lattice structure, a storage medium and a device, which are applied to the technical field of TPMS lattices, and the design method comprises the following steps: establishing a coordinate system o-xyz by taking the lattice direction of a TPMS basic unit cell as a reference; gradient transformation is carried out on the TPMS basic unit cells in the x-axis direction, and a gradient column structure is obtained; performing gradient transformation on the gradient column structure along the y-axis direction to obtain a gradient layer structure; array copying is conducted on the gradient layer structure in the z-axis direction, and a TPMS lattice is obtained. The lattice structure is obtained by adopting the design method. A terminal program is stored in the storage medium, and the design method is carried out when the terminal program is executed. The device comprises a memory, a processor and a computer program in which steps corresponding to the design method are stored. The TPMS lattice structure is expanded from one direction to a plurality of directions, so that the lattice structure can form continuously changing rigidity distribution in a plurality of lattice directions, a multi-direction continuous stress diffusion path is formed, and the impact resistance of the TPMS lattice is further improved.

The invention discloses a novel structure construction method using a gradient triple-period minimal surface lattice. The novel structure construction method comprises the following steps: defining a mathematical relationship of an entity part of a TPMS lattice according to a selected scene; the standard TPMS lattice in the original cube is deformed and matched into the pyramid space, a transition structure is formed, and a final TPMS distortion structure is output; connecting the upper-layer small unit lattices with the lower-layer large unit lattices by the TPMS twisted structure to generate gradient lattices without geometric defects; the gradient between different unit numbers is controlled by controlling the size of the top plane of the pyramid; the size of the transition area is adjusted, the transformation completion distance of the substructure is changed, and then the elastic modulus is adjusted and controlled; the number of layers of the base structure in the transition area is increased, and the buffering distance of structure transformation is prolonged. The problems that in the prior art, a gradient lattice transition area has geometric defects, the adjustable range of elastic modulus is small, and stress is concentrated are solved, and the stability and durability of the structure are improved.

A transparent wood surface imprinting optical device is provided. A preparation method for the device includes cleaning and drying surfaces of transparent wood, spin-coating polymethyl methacrylate (PMMA) on a substrate of the transparent wood to obtain a PMMA layer, and spin-coating an ultraviolet (UV) glue on the PMMA layer to obtain a UV glue layer; placing the transparent wood on a silicon wafer, attaching a transparent grating array imprinting template on the UV glue layer, exposing the UV glue layer, and removing the transparent grating array imprinting after the exposing, thereby to obtain a grating-structure-based transparent wood; and replacing the grating structure imprinting template by a lattice structure imprinting template to prepare lattice-structure-based transparent wood. The diffraction efficiency of the grating structure and the lattice structure on the transparent wood are greater and more stable than those of PMMA substrates.

The utility model relates to the technical field of building engineering, concretely relates to the optimization design of the structure of external scaffold and steel sheet net connecting device, the utility model is realized through the following technical scheme: a kind of external frame steel sheet net connecting device, including connecting steel pipe and connecting plate, the one end of connecting steel pipe is provided with the slot for the insertion of connecting plate along its length direction, and the slot extends the clamping interface of connecting steel pipe in the circumferential direction;Connecting plate includes the horizontal main part of part insertion in the connecting steel pipe, and the convex part of the clamping interface resistance cooperation that is outwardly extended horizontally from horizontal main part. The utility model aims at the improvement of the structure of connecting steel pipe and connecting plate itself, the stable connection of both can be realized without additional connecting bolt, eliminate the security risk caused by bolt drop, enhance the security and stability in construction process.

The invention relates to the technical field of additive manufacturing, and discloses a supporting structure for additive manufacturing of a large-size thin-wall workpiece, which comprises a hollow rib plate control frame, a variable density lattice support and a solid grid lattice distribution structure, the hollow rib plate shape control frame is arranged in the thin-wall part or in an opening area, the variable-density lattice support is arranged at a key part and an easy-to-deform area of the thin-wall part, and the solid grid lattice distribution structure is arranged in a stress concentration area or a sudden change surface area of the thin-wall part. A sawtooth cutting contact structure is arranged at the contact part of the cutter and the thin-wall part; according to the supporting structure for additive manufacturing of the large-size thin-wall part, mechanical linkage and thermal expansion self-adaption design of the movable assembly are utilized, transmission cooperation of a driving plate, a toothed plate and a gear is combined with the limiting effect of a bevel gear set and a limiting plate, an abutting plate is attached to the inner wall of a frame all the time, and gaps and stress concentration caused by thermal expansion are counteracted; and the supporting stability and the fitting degree are maintained.

This invention relates to the field of parts processing equipment technology, and discloses a modular assembly and welding equipment for metal chassis parts. The equipment includes a processing table with adjustment slots on both sides of the top center of the processing table. A central plane seat, movable forward and backward, is slidably connected within each adjustment slot. A workpiece positioning mechanism, mounted on the processing table, is used to position the vertical columns and internal partitions of the chassis to be welded before processing. By adding and setting the pre-processing mechanism, the internal partitions can be uniformly preheated throughout the entire area. This method not only avoids softening and deformation of the sheet metal caused by localized overheating, but also slowly releases the residual lattice stress from previous bending and stamping processes, laying the foundation for subsequent welding shrinkage balance. Simultaneously, pulsed current further enhances the stress release effect, maintaining the original mechanical properties of the partitions without additional heat input and solving the problem of pre-processing lattice distortion.

The invention provides a three-dimensional staggered lattice structure design method derived from a two-dimensional grid, and belongs to the technical field of lattice structure design. The method comprises the following steps of: 1, performing array and dislocation displacement on two-dimensional grid unit cells to form a three-dimensional staggered lattice structure; 2, when the dislocation displacement distance is smaller than the single-layer thickness and equal to the single-layer thickness, additional connecting rod pieces do not need to be added between two adjacent layers of two-dimensional grid unit cells for connection, and when the dislocation displacement distance is larger than the single-layer thickness, additional connecting rod pieces need to be added between two adjacent layers of two-dimensional grid unit cells for connection; 3, when the dislocation displacement distance is larger than the thickness of a single layer, the number and positions of interlayer connecting points between two adjacent layers of two-dimensional grid unit cells and the form of connecting rod pieces are designed according to requirements, and optimization is conducted through topological optimization and rod piece hollowing. Compared with an original two-dimensional grid structure, the weight and the occupied space are not greatly increased, the out-of-plane rigidity is greatly improved, and the structure is simple and effective.

The application discloses a three-dimensional lattice array structure with a controllable z-direction Poisson's ratio, and a basic unit comprises a lower bottom layer, an upper bottom layer, an intra-unit connecting rod and an inter-unit connecting rod, and the intra-unit connecting rod and the inter-unit connecting rod are symmetrical about the lower bottom layer or the upper bottom layer; a surface formed after arraying the lower bottom layer and the upper bottom layer is a novel negative Poisson's ratio plane structure, which comprises a central concave-arc-side hexagonal structure composed of concave-arc-sides and a chiral structure composed of plane connecting rods, and the plane connecting rods of the lower bottom layer and the upper bottom layer are opposite to each other around the direction of the central concave-arc-side hexagonal structure. The structure proposed by the application couples a chiral structure and a concave-arc-side polygonal structure on the upper bottom layer and the lower bottom layer, has a negative Poisson's ratio characteristic, and simultaneously improves the deformation capacity and the energy absorption and vibration reduction characteristics of the structure; the three-dimensional lattice array structure proposed can change the inclination direction of the connecting rods according to actual requirements, so as to realize a variable Poisson's ratio characteristic, and thus the application range of the structure is expanded.

Methods and an induction curing system for curing a composite panel. The induction curing system comprises; a rigid curing tool configured to hold a composite material; a vacuum bagging material sealed to the rigid curing tool; and a dimensional control structure having a lattice and an open casing formed of a rigid material, the lattice positioned within a concavity of the open casing, the dimensional control structure sealed to at least one of the vacuum bagging material or the rigid curing tool.

This application provides a heat dissipation module and a motor. The heat dissipation module includes a housing and a lattice structure. The lattice structure includes multiple stacked lattice sub-parts, each lattice sub-part having multiple heat dissipation sub-channels spaced apart along a direction perpendicular to the stacking direction of the lattice structure. The arrangement directions of the heat dissipation sub-channels of adjacent lattice sub-parts are different. Along the stacking direction of the lattice structure, the heat dissipation sub-channels of the multiple lattice sub-parts are sequentially connected to form a heat dissipation channel penetrating the housing, which is used for the flow of cooling gas. This application uses a lattice structure formed by multiple lattice sub-parts as a heat sink, which increases the heat dissipation surface of the heat dissipation module, ensures sufficient flow space in the heat dissipation channel, and, by limiting the arrangement directions of the heat dissipation sub-channels of adjacent lattice sub-parts to different directions, results in a heat dissipation channel composed of heat dissipation sub-channels of various shapes, which is beneficial for creating turbulence in the cooling gas, thereby improving the heat dissipation effect of the heat dissipation module.

The present invention relates to lattice materials (5) used in many engineering fields, particularly materials engineering. These materials are formed from a lattice structure (1) comprising an inner element (2) in the form of an irregular polygon having at least six edges, with struts arranged along each edge to create at least one triangle (3.1).

A porous media transport diffusion plate is provided. The porous media diffusion plate has an outer support perimeter configured to be coupled to a process chamber that delivers a flow of material through the porous media transport diffusion plate; and a built porous media transport layer has a plurality of lattice structures contained in the outer support perimeter to receive and diffuse the flow of material. The lattice structure is formed by a plurality of struts and plurality of ribs coupled by joints and connection points.

The invention relates to a large-aperture reflector lightweight topological structure based on three-stage reinforcing ribs, a reflector is composed of a plurality of groups of hexagonal lattice arrays, a plurality of first-stage equilateral triangles are processed in each hexagonal lattice, and the sides of the first-stage equilateral triangles form first-stage reinforcing ribs; every six first-stage equilateral triangles form a second-stage equilateral triangle, and the edges of the second-stage equilateral triangles are heightened and thickened on the basis of the first-stage reinforcing ribs to form second-stage reinforcing ribs; the outermost side of each second-level equilateral triangle serves as the side of the hexagonal lattice, and the height and the thickness are increased on the basis of the second-level reinforcing ribs, so that third-level reinforcing ribs are formed. According to the invention, the weight of the large-aperture reflector can be fully reduced, and the lightweight rate of the reflector is improved.

The invention relates to the technical field of metamaterial lattice structures, in particular to a construction method of a mixed positive and negative Poisson's ratio structure. According to the method, a lattice structure is constructed based on a plurality of FCC, then the lattice structure and a 3D RH structure are fused to form a new concave lattice structure, and the structure solves the problems that an existing negative Poisson's ratio structure is large in plastic section stress fluctuation and low in platform stress under compression loads, so that the energy absorption performance of the negative Poisson's ratio structure is improved, and the energy absorption performance of the negative Poisson's ratio structure is improved. The invention discloses a mixed positive and negative Poisson's ratio structure constructed by the method, a metamaterial comprising the structure and a preparation method of the metamaterial.

The present disclosure provides a 3D-printed bicycle saddle including a shell and an elastic pad disposed on the shell, wherein the elastic pad has a bottom surface facing the shell and a top surface facing away from the bottom surface. The elastic pad features a 3D-printed lattice structure including a plurality of lattice struts, wherein the diameter of each lattice strut gradually increases in a gradient manner from the top surface to the bottom surface of the elastic pad. The difference between the maximum diameter and the minimum diameter of each of the lattice struts is smaller than or equal to 0.5 mm.

The invention provides a concrete water and soil chemical heat release calculation method and system based on layered pouring and a nonlinear dynamic heat source, and belongs to the technical field of concrete hydration heat calculation. A mass concrete structure is dispersed into a regular lattice system, and layered pouring is simulated by controlling the activation state of lattices; a multi-component cement hydration heat model coupled with the real-time temperature is embedded in each active lattice point to serve as a dynamic heat source; and the lattice Boltzmann method is utilized to calculate the conduction of heat between lattices and the dissipation at the boundary, so that the accurate temperature field distribution of the mass concrete structure in time and space is obtained. The lattice points are activated in a layered manner, and heat release attributes and heat dissipation attributes are stored in the lattice points, so that the problem that heat dissipation boundary conditions of concrete are changed due to introduction of a new dynamic heat source is solved, and accurate simulation of the heat transfer history of the system is realized.

The application relates to a manufacturing method of a UHPC prefabricated guardrail for a highway, which comprises the following steps: weaving metal flat wires into a negative Poisson's ratio plane unit with a chiral lattice structure, and the rectangular arbitrary edge direction has at least three layers of the chiral lattice structure; performing a carbonization process treatment on the negative Poisson's ratio plane unit after being connected in series by using carbon fiber raw wires to form a sheet skeleton; magnetically polarizing micro straight steel fibers and then configuring UHPC slurry; pouring the UHPC slurry into a mold in which the sheet skeleton is placed, demolding after curing and solidification to obtain a prefabricated guardrail module. The sheet skeleton is composed of metal flat wires and carbon fibers, UHPC material is poured to form a prefabricated wave-shaped guardrail, the self weight is reduced, the energy absorption capacity and the impact resistance of the guardrail are improved, the density of the micro straight steel fibers in the magnetically controlled UHPC material and the exposed form of the UHPC solidification surface are changed to make the micro straight steel fibers have a hydrophobic surface, corrosion prevention effect is realized, and the service life of the guardrail is prolonged.

The present application relates to the field of shoe sole design, and specifically relates to a lattice structure rod diameter reverse design method, comprising the following sequentially executed steps: S1: constructing a unit cell structure; S2: defining parameters: connecting rod diameter d1, main rod diameter d2, fiber rod diameter d3, unit cell structure side length L and shape coefficient alpha; S3: generating a test structure; S4: obtaining the super-elasticity data and viscoelasticity data of the test structure, and establishing a finite element analysis model of the test structure; S5: setting each parameter, simulating and analyzing the test structure under each combination, obtaining the mechanical performance indicators of each test structure, and constructing a mechanical performance indicator database using the obtained mechanical performance indicators; S6: determining a unique rod diameter combination; S7: generating a lattice structure for filling a shoe sole according to the obtained rod diameter combination; the design method can quickly realize the reverse design of the rod diameter parameters in the lattice lattice structure, quickly iteratively obtain the rod diameter combination parameters under the target mechanical performance, and save design costs.

The application discloses a discrete doll-in-doll type periodic vibration reduction and isolation pile and a laying method thereof, and comprises: a plurality of discrete doll-in-doll type vibration reduction and isolation single piles arranged according to a square lattice; each single pile structure comprises a local resonance concrete layer, a rubber soft layer and a steel pipe wrapping layer which are sequentially and multi-layered nested; the single pile as a whole presents a doll-in-doll type structure, and the cross section of each single pile is circular, and the rubber soft layer is arranged in a discrete type along the ring direction. The pile utilizes the band gap characteristics of the periodic structure to inhibit environmental vibrations with frequencies in the attenuation domain range, so as to reduce the adverse effects of environmental vibrations such as rail transit operation and earthquakes; the pile can break the limitation that the traditional periodic vibration reduction and isolation pile is not conducive to isolating low-frequency vibration waves in a limited site; the pile can make up for the defect that the traditional periodic vibration reduction and isolation pile can only isolate vibrations in a single frequency band, and realizes multi-frequency band vibration reduction and isolation application; the pile has strong geometric variability, can be targeted to attenuate environmental vibrations in different frequency bands, and has good durability and high operability.

The invention belongs to the technical field of structural design and mechanical property analysis, and particularly discloses a dot matrix entity mixed structure and a design method thereof.The method comprises the following steps that an entity structure model and a cubic structure model are constructed and subjected to topological optimization, and an optimized entity structure and a TOPO lattice are obtained; the TOPO crystal lattice and the BCC or FCC regular crystal lattice are geometrically coupled to form a hybrid crystal lattice; embedding the hybrid lattice into a low-density region in the optimized entity structure, and constructing a lattice entity mixed structure; a finite element model is established on the basis of an explicit dynamics platform, three-point bending boundary conditions are applied, load-displacement response and stress distribution of a hybrid structure are analyzed, and then layout and parameters of hybrid lattices and the shape of an entity structure are adjusted according to analysis results. According to the method, collaborative optimization of the bearing capacity, the bending rigidity and the energy absorption efficiency of the structure can be achieved, a systematic simulation verification process is established, and an efficient design basis is provided for engineering application.

The invention relates to sheet metal working bending equipment with an adjustable bending section, which relates to the related technical field of sheet metal working, and comprises a bottom plate, a dustproof shell, a body, a support assembly, a built-in groove, a bending head, a suspension bracket, a guide assembly, a bending seat, a bending assembly and a linkage assembly, the method can solve the problems that in the prior art, a material is subjected to large-amplitude plastic deformation instantly in a single-time direct bending mode, so that an internal lattice structure of the material is subjected to severe recombination in an extremely short time, high-concentration residual internal stress is generated, after external bending force is unloaded, the forcibly-restrained stress seeks to be released, and the material is damaged. The problems that the bending angle is difficult to accurately control due to the fact that the bending angle is large, the rebound amount is in non-linear fluctuation due to small differences of material characteristics, thicknesses and the like, and finally the forming size stability is poor, and the product percent of pass is difficult to guarantee are solved.

This application discloses an optimization method and system for lattice support, a computer device, a medium, and a computer program product. The optimization method for lattice support includes the following steps: obtaining a 3D printed model corresponding to a target part and its lattice support; wherein the lattice support is composed of multiple support units; identifying the suspended support units in the lattice support; wherein the suspended support units are support units whose lower ends have a gap with the building plane and do not have any supporting support; for each suspended support unit, establishing a connecting support with at least one support unit connected to its lower end, which can form a supporting support between the lower end of the suspended support unit and the building plane, to obtain the optimized lattice support.

The application belongs to the technical field of computer-aided design and structure design, and discloses a multi-scale lattice structure and a design method thereof. The design method comprises the following steps: S1, a cubic unit cell with 8 symmetrically distributed corner nodes is designed according to a cubic lattice structure; S2, all lattice unit cells are scaled respectively, a part of the lattice unit cells are scaled into small lattice unit cells with a size being half of the original size, and the other part of the lattice unit cells are large lattice unit cells with the original size; S3, the positional relationship of the small lattice unit cells and the large lattice unit cells is arranged in a macroscopic lattice structure; and S4, the macroscopic lattice structure is adjusted by using a connection mode of the small and large lattice unit cells based on rod diameter transition through a computer-aided design method. The multi-scale small and large lattice unit cell arrangement mode is introduced into the lattice structure, so that the lattice structure has better mechanical properties under the same compression load.

A path planning method for lattice three-dimensional (3D) printing includes generating a 3D model; slicing the 3D model to generate a 2D contour; determining a region of the 2D contour; and generating a path. The 3D model is represented by an explicit mesh or implicit function. Slicing the 3D model to generate the 2D contour includes generating the 2D contour of the 3D model defined by an explicit or implicit function. For a 3D model defined by an explicit function, a 2D contour is generated by calculating intersections between slice layers and triangular meshes. The determination of the region comprises dividing the lattice structure or the thin-wall structure into two regions including a thin wall and a wall connection. Geometric features of the two regions are defined by the tilt angle and the plate thickness.

This invention belongs to the field of wind power generation technology and discloses a biomimetic tower for a wind turbine and a wind turbine generator. The biomimetic tower for the wind turbine generator includes a tower body and a biomimetic inner rib structure. The diameter of the tower body gradually decreases from bottom to top. The biomimetic inner rib structure is connected to the inner wall of the tower body. The biomimetic inner rib structure includes multiple circumferential inner ribs, multiple axial inner ribs, and double diagonal stiffening ribs. The multiple circumferential inner ribs and multiple axial inner ribs enclose multiple lattice units. The double diagonal stiffening ribs include multiple first stiffening ribs and multiple second stiffening ribs. The multiple first stiffening ribs and multiple second stiffening ribs are arranged at an angle within the lattice units and are connected to the sides of the lattice units. This biomimetic tower for the wind turbine generator has better overall stability, can control the vibration amplitude at the top of the tower, and can improve buckling resistance, fatigue resistance, and vibration reduction performance without changing the outer surface shape and near-field flow boundary, while avoiding adverse effects on tower shadow effect and wake characteristics.