CN115476549B - Voxelized ordered porous structure and modularized assembly method thereof - Google Patents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
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Abstract
A voxelized ordered porous structure and a modularized assembly method thereof relate to the technical field of materials. The invention aims to solve the problem that the existing large-size or complex porous structure is difficult to prepare. The voxel ordered porous structure comprises a plurality of voxel modules, wherein the voxel modules are fixedly connected in parallel along the length direction, each voxel module comprises a plurality of voxel units which are arranged in a matrix shape, each voxel unit comprises a functional component and a plurality of connecting blocks, the plurality of connecting blocks are uniformly and symmetrically fixedly connected to the outer side edge of the functional component, and every two adjacent connecting blocks between every two adjacent voxel units are fixedly connected.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a voxelized ordered porous structure and a modularized assembly method thereof.
Background
The basic configuration of the porous structure is derived from the unique microscopic geometric characteristics of the biological material, and has excellent mechanical characteristics and unique multifunctional composite characteristics. Compared with the traditional disordered porous material foam and compact material, the ordered porous material represented by the lattice has the advantages of accurate load transmission path in the microstructure, wide adjustable range of mechanical properties and multiple designable parameters, and has great application potential in the industrial fields of aerospace, transportation, national defense, biomedical treatment, energy, mechanical equipment and the like.
The macroscopic mechanical properties of ordered porous structures are highly dependent on the geometry, distribution characteristics and deformation modes of the internal unit cells of the structure. The structural form gradually expands from a light and efficient lattice bearing structure to a metamaterial functional structure with abnormal characteristics such as negative poisson ratio, multistability, zero negative thermal expansion, ultralow shear rigidity and the like. At present, the lattice structure preparation mainly comprises a mesh series laminated spot welding scheme, an investment casting scheme, a rolling-electroplating welding scheme and the like based on metal materials, and a braiding and sewing process, a co-curing mould pressing process, a continuous fiber/short fiber printing process and the like based on composite materials. Whereas metamaterial structures mostly employ a 3D printing process based on polymer materials due to their complex configuration. The structure scale of the existing preparation is limited by equipment such as a forming die, a processing machine tool, a printing platform and the like, so that the structure cannot be prepared into a large-size or oversized component, and in engineering application, an ordered porous structure generally appears in a large-scale mode, which is far beyond the preparation size of laboratory level. And there is one-to-one correspondence among structural configuration, composition materials and preparation modes, so that different structures are difficult to integrate, and structural collaborative design and structural function integrated design are prevented.
Disclosure of Invention
The invention aims to solve the problem that the existing large-size or complex porous structure is difficult to prepare, and further provides a voxelized ordered porous structure and a modularized assembly method thereof.
The technical scheme adopted for solving the technical problems is as follows:
the voxel ordered porous structure comprises a plurality of voxel modules, wherein the voxel modules are fixedly connected in parallel along the length direction, each voxel module comprises a plurality of voxel units which are arranged in a matrix shape, each voxel unit comprises a functional component and a plurality of connecting blocks, the plurality of connecting blocks are uniformly distributed and symmetrically fixedly connected at the outer side edge of the functional component, and every two adjacent connecting blocks between every two adjacent voxel units are fixedly connected.
Further, the voxel module comprises a plurality of groups of voxel units, the plurality of groups of voxel units are arranged in parallel along the thickness direction, and each group of voxel units comprises a plurality of voxel units of the same kind or different kinds.
Further, the connection block is disposed at an end portion or a middle portion of the functional module.
Further, the functional component is a lattice bearing structure or a metamaterial structure.
Further, the functional component is an octahedral lattice unit cell structure or a multistable lattice unit cell structure or a negative poisson ratio lattice unit cell structure.
Further, the number of the connection blocks in each voxel unit is six.
Further, the voxelized ordered porous structure further comprises two skins, and the skins are respectively arranged on the inner side and the outer side of the plurality of voxel modules.
Further, the skin is connected with the voxel module in a gluing way.
A modular assembly method of a voxelized ordered porous structure comprises the following steps:
sequentially fixedly connecting a plurality of voxel units into a group of voxel units by a manipulator;
sequentially fixedly connecting a plurality of groups of voxel units into voxel modules along the thickness direction by using a manipulator;
sequentially fixedly connecting a plurality of voxel modules into a porous structure along the length direction by using a manipulator;
and fourthly, fixedly connecting skins on the inner side and the outer side of the porous structure to prepare the sandwich structure.
Further, in the first step, the second step, the third step and the fourth step, the fixing mode is welding or cementing.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a technical method for discretizing a complex or large-size structure into voxels for preparation and then carrying out multifunctional assembly according to requirements, so as to solve the problems of large-size preparation and multifunctional collaborative preparation of the structure.
The connecting block is mainly used for connecting different voxels so as to form a structure whole. The single voxel units can be connected to form a single functional structure, and the different voxel units can be connected to form a multifunctional integrated structure. The invention can also solve the design problem of the multi-material combined structure.
The connection area provided by the invention is used for mechanical assembly to form a large-size and multi-hybrid ordered porous structure, and the ordered porous structure voxelized design and modularized assembly method provided by the invention are easy to design and prepare a large-size structural member, and are easy to lead the structure with different functions to be produced in a standardized way, thereby enabling the mass production of the structure to be possible and greatly reducing the manufacturing cost. The large-size structure can be produced in a standardized way in a factory, so that the transportation difficulty is reduced, and the large-size structure can be conveniently and quickly assembled in a use place.
The voxel unit provided by the invention can be automatically produced, and has high production efficiency, so that the stability of the processing quality of the complex voxel unit 2 is ensured, and the overall structural safety is further ensured; the assembly of different functional voxel units can meet the requirement of failing to function; the shape requirement of the plastic can be met through different assembly modes; easy assembly and disassembly, and then easy replacement, updating, maintenance, recovery and the like of the voxel units.
Drawings
FIG. 1 is a schematic diagram of the discrete voxelization process of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the functional module 3 of the present invention in an octahedral lattice unit cell structure;
FIG. 3 is a schematic diagram of the structure of the multistable lattice unit cell of the functional device 3 according to the present invention;
FIG. 4 is a schematic diagram of the structure of the functional component 3 of the present invention, which is a negative Poisson ratio lattice unit cell structure;
FIG. 5 is a schematic diagram of a process for preparing a digital programming assembled hybrid collaborative design in accordance with the present invention;
FIG. 6 is a schematic diagram of the process for preparing the assembled sandwich panel from octahedral lattice unit cell structure voxel units 5 in the present invention;
FIG. 7 is a schematic diagram of the process of preparing a sandwich panel assembled from multistable lattice unit structure voxel units 6 in the present invention;
FIG. 8 is a schematic diagram of the process of preparing a sandwich panel assembled from negative Poisson's ratio lattice unit cell structure voxel units 7 in the present invention;
FIG. 9 is a schematic diagram of the process of preparing a cartridge assembled from octahedral lattice unit cell structure voxel units 5 in the present invention;
FIG. 10 is a schematic diagram of a process for preparing a cartridge assembled from multistable lattice unit structure voxel units 6 in the present invention;
FIG. 11 is a schematic diagram of a process for preparing a cartridge assembled by negative poisson's ratio lattice unit cell structure voxel units 7 in the invention;
FIG. 12 is a schematic diagram of an automated assembly strategy according to the present invention.
Wherein: 1-general structure; a 2-voxel unit; 3-functional components; 4-connecting blocks; 5-octahedral lattice unit cell structure voxel unit; 6-multistable lattice unit cell structure voxel unit; 7-negative poisson ratio lattice unit cell structure voxel unit; 8-covering.
Detailed Description
The first embodiment is as follows: referring to fig. 1 to 12, the voxel ordered porous structure according to this embodiment includes a plurality of voxel modules, wherein the voxel modules are fixedly connected in parallel along a length direction, each voxel module includes a plurality of voxel units 2 arranged in a matrix, each voxel unit 2 includes a functional module 3 and a plurality of connection blocks 4, the plurality of connection blocks 4 are uniformly and symmetrically fixedly connected at an outer edge of the functional module 3, and every two adjacent connection blocks 4 between every two adjacent voxel units 2 are fixedly connected.
The second embodiment is as follows: the voxel module according to the present embodiment includes a plurality of sets of voxel units 2, and the plurality of sets of voxel units 2 are arranged in parallel in the thickness direction, and each set of voxel units 2 includes a plurality of voxel units 2 of the same kind or a plurality of different kinds, described with reference to fig. 1 to 12. The technical features not disclosed in this embodiment are the same as those of the first embodiment.
And a third specific embodiment: the present embodiment will be described with reference to fig. 1 to 12, in which the connection block 4 is provided at an end portion or a middle portion of the functional module 3. The technical features not disclosed in this embodiment are the same as those of the first embodiment.
The specific embodiment IV is as follows: the present embodiment will be described with reference to fig. 1 to 12, where the functional component 3 in the present embodiment is a lattice bearing structure or a metamaterial structure. The technical features not disclosed in this embodiment are the same as those of the first, second or third embodiments.
Fifth embodiment: the present embodiment is described with reference to fig. 1 to 12, in which the functional component 3 is an octahedral lattice unit cell structure, a multistable lattice unit cell structure, or a negative poisson ratio lattice unit cell structure. The technical features not disclosed in this embodiment are the same as those of the fourth embodiment.
Specific embodiment six: the present embodiment is described with reference to fig. 1 to 12, in which the number of connection blocks 4 in each voxel unit 2 is six. The technical features not disclosed in this embodiment are the same as those of the first, second, third or fifth embodiments.
Seventh embodiment: the present embodiment is described with reference to fig. 1 to 12, and the voxel-based ordered porous structure of the present embodiment further includes two skins 8, where the skins 8 are disposed on the inner and outer sides of the plurality of voxel modules, respectively. The technical features not disclosed in this embodiment are the same as those of the sixth embodiment.
Eighth embodiment: the present embodiment is described with reference to fig. 1 to 12, in which the skin 8 and the voxel module are adhesively bonded. The technical features not disclosed in this embodiment are the same as those of the first embodiment.
Detailed description nine: the method for modular assembly of the voxelized ordered porous structure according to the present embodiment includes the following steps, referring to fig. 1 to 12:
sequentially fixedly connecting a plurality of voxel units 2 into a group of voxel units 2 by a manipulator;
sequentially fixedly connecting a plurality of groups of voxel units 2 into voxel modules along the thickness direction by using a manipulator;
sequentially fixedly connecting a plurality of voxel modules into a porous structure along the length direction by using a manipulator;
and fourthly, fixedly connecting skins 8 on the inner side and the outer side of the porous structure to prepare the sandwich structure.
Detailed description ten: in the first, second, third and fourth embodiments described in the present embodiment, the fastening manner is welding or gluing, which will be described with reference to fig. 1 to 12. The technical features not disclosed in this embodiment are the same as those of the embodiment nine.
The preparation method of the voxel unit 2 is not limited in this embodiment, and it may be prepared in various ways, either integrally or separately.
The functional component 3 is designed into a lattice bearing structure, such as an octahedral lattice unit cell structure voxel unit 5, mainly according to the functional requirement of the structure; or a multifunctional material structure such as a multistable lattice unit cell structure voxel unit 6 and a negative poisson ratio lattice unit cell structure voxel unit 7; the connecting block 4 is mainly used for connecting different voxel units 2 so as to form a whole structure.
The voxel units 2 can be singly connected to form a single functional structure, or different voxel units 2 can be connected to form a multifunctional integrated structure. Depending on the voxels of the connecting piece 4, a sandwich structure with a planar or curved skin 8 can be produced.
The voxel unit 2 can be assembled automatically by a mechanical arm, manual operation is not needed, and the production efficiency is high.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The modular assembly method of the voxelized ordered porous structure comprises a plurality of voxelized modules, wherein the voxelized modules are fixedly connected in parallel along the length direction, each voxelized module comprises a plurality of voxelized units (2) which are arranged in a matrix shape, each voxelized unit (2) comprises a functional component (3) and a plurality of connecting blocks (4), the connecting blocks (4) are uniformly and symmetrically fixedly connected to the outer side edge of the functional component (3), and every two adjacent connecting blocks (4) between every two adjacent voxelized units (2) are fixedly connected; the voxel module comprises a plurality of groups of voxel units (2), the plurality of groups of voxel units (2) are arranged in parallel along the thickness direction, and each group of voxel units (2) comprises a plurality of voxel units (2) of the same kind or different kinds; the connecting block (4) is arranged at the end part or the middle part of the functional component (3); the functional component (3) is of an octahedral lattice unit cell structure or a multistable lattice unit cell structure or a negative poisson ratio lattice unit cell structure; the number of the connecting blocks (4) in each voxel unit (2) is six; the voxelized ordered porous structure further comprises two skins (8), wherein the skins (8) are respectively arranged on the inner side and the outer side of the voxel modules; the skin (8) is connected with the voxel module in a gluing way;
the method is characterized in that: the method comprises the following steps:
sequentially fixedly connecting a plurality of voxel units (2) into a group of voxel units (2) by a manipulator;
sequentially fixedly connecting a plurality of groups of voxel units (2) into voxel modules along the thickness direction by using a manipulator;
sequentially fixedly connecting a plurality of voxel modules into a porous structure along the length direction by using a manipulator;
and fourthly, fixedly connecting skins (8) on the inner side and the outer side of the porous structure to prepare the sandwich structure.
2. A modular assembly method of a voxelized ordered porous structure according to claim 1, wherein: in the first step, the second step, the third step and the fourth step, the fixedly connecting mode is welding or cementing.
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| 轻质高强多功能点阵夹层结构研究进展;陈东;吴永鹏;李忠盛;黄安畏;孙彩云;吴道勋;花泽荟;舒露;周富;;装备环境工程(第04期);全文 * |
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