CN115476549A - Voxelized ordered porous structure and modular assembly method thereof - Google Patents
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- 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
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Abstract
A voxelized ordered porous structure and a modular 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 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 arranged in a matrix shape, each voxelized unit comprises a functional component and a plurality of connecting blocks, the connecting blocks are uniformly distributed and symmetrically and fixedly connected to the outer edge of the functional component, and every two adjacent voxelized units are fixedly connected with each other through two adjacent connecting blocks.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a voxelized ordered porous structure and a modular assembly method thereof.
Background
The basic configuration of the porous structure is derived from the unique microscopic geometrical properties of the biological material, and has excellent mechanical properties and unique multifunctional composite properties. 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 transfer path inside the microstructure, wide adjustable and controllable mechanical property range and more 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 geometrical configuration, distribution characteristics and deformation modes of the unit cells inside the structure. The structural form is gradually expanded from a light and efficient lattice bearing structure to a metamaterial functional structure with abnormal characteristics such as negative Poisson ratio, multiple stable states, zero negative thermal expansion, ultralow shear stiffness and the like. At present, lattice structure preparation mainly comprises a metal material-based mesh system laminated spot welding scheme, an investment casting scheme, a binding-electroplating welding scheme and the like, and a composite material-based weaving and sewing process, a co-curing mould pressing process, a continuous fiber/short fiber printing process and the like. And the metamaterial structure mostly adopts a 3D printing process based on a polymer material due to its complex configuration. The scale of the existing prepared structure is restricted by equipment such as a forming die, a processing machine tool, a printing platform and the like, so that the existing prepared structure cannot be prepared into a large-size or super-large-size component, and an ordered porous structure generally appears in a large-scale mode in engineering application, which far exceeds the preparation size of a laboratory level. And the structure configuration, the composition materials and the preparation mode have one-to-one correspondence, so that different structures are difficult to integrate, and the structure collaborative design and the structure function integrated design are hindered.
Disclosure of Invention
The invention provides a voxelized ordered porous structure and a modular assembly method thereof, aiming at solving the problem that the existing large-size or complex porous structure is difficult to prepare.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a voxelization ordered porous structure includes a plurality of voxel modules, and the rigid coupling is in parallel along length direction between a plurality of voxel modules, and the voxel module includes a plurality of voxel units that are the matrix form and set up, and the voxel unit includes functional component and a plurality of connecting block, and the outside edge at functional component of a plurality of connecting block equipartition symmetry rigid coupling, two adjacent connecting block rigid couplings between every two adjacent voxel units.
Furthermore, the voxel module includes multiple sets of voxel units, the multiple sets of voxel units are arranged in parallel along the thickness direction, and each set of voxel unit includes multiple same or multiple different types of voxel units.
Further, the connecting block is arranged at the end or in the middle of the functional component.
Further, the functional component is a lattice bearing structure or a metamaterial structure.
Furthermore, 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 voxel modules.
Further, the skin and the voxel module are connected through glue joint.
A modular assembly method of a voxelized ordered porous structure comprises the following steps:
step one, a plurality of voxel units are fixedly connected into a group of voxel units in sequence through a mechanical arm;
secondly, sequentially fixedly connecting a plurality of groups of voxel units into voxel modules along the thickness direction through a mechanical arm;
thirdly, sequentially fixing a plurality of voxel modules into a porous structure along the length direction through a manipulator;
and fourthly, fixedly connecting skins on the inner side and the outer side of the porous structure to prepare a sandwich structure.
Furthermore, in the first step, the second step, the third step and the fourth step, the fixing mode is welding or gluing.
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 performing multifunctional assembly according to requirements, thereby solving the problems of large-size preparation and multifunctional cooperative preparation of the structure.
The connecting block is mainly used for connecting different voxels to form a structural whole. The single voxel unit can be connected to form a single functional structure, and different voxel units can be connected to form a multifunctional integrated structure. The invention can also solve the design problem of the combined composition structure of multiple materials.
The connection regions provided by the invention are utilized to carry out mechanical assembly to form a large-size and multi-hybrid ordered porous structure, the ordered porous structure voxelization design and the modular assembly method provided by the invention are easy to design and prepare large-size structural members, are easy to realize standardized production of structures with different functions, enable mass production of the structures to be possible, and greatly reduce the manufacturing cost. The large-size structure can be produced in a standardized manner in a factory, 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 safety of the whole structure is further ensured; the non-functional requirements can be met by assembling different functional voxel units; the shape requirement can be met through different assembling modes; the voxel unit is easy to assemble and disassemble, and therefore the voxel unit is easy to replace, update, maintain, recycle and the like.
Drawings
FIG. 1 is a schematic diagram of a structure discretization voxelization process of the present invention;
FIG. 2 is a schematic structural diagram of an octahedral lattice unit cell structure as a functional element 3 according to the present invention;
FIG. 3 is a schematic structural diagram of a functional module 3 of the present invention, which is a multi-stable lattice unit cell structure;
FIG. 4 is a schematic structural diagram of a functional module 3 of the present invention with a negative Poisson ratio lattice unit cell structure;
FIG. 5 is a schematic diagram of a hybrid structure collaborative design manufacturing process according to the present invention;
FIG. 6 is a schematic diagram of the preparation process of the sandwich panel assembled by the octahedral lattice unit structure voxel unit 5 in the present invention;
FIG. 7 is a schematic diagram of the preparation process of the sandwich panel assembled by the multistable lattice unit cell structure voxel unit 6 in the invention;
FIG. 8 is a schematic diagram of a manufacturing process of assembling a sandwich panel by a negative Poisson ratio lattice unit structure voxel unit 7 in the present invention;
FIG. 9 is a schematic diagram of a process for preparing a mandrel composed of octahedral lattice unit structure voxel units 5 according to the present invention;
FIG. 10 is a schematic diagram of a process for preparing a core barrel assembled by multistable lattice unit cell structure voxel units 6 according to the present invention;
FIG. 11 is a schematic diagram of a process for preparing a core barrel assembled by a negative Poisson ratio lattice unit structure voxel unit 7 according to the present invention;
FIG. 12 is a schematic diagram of an automated assembly strategy of the present invention.
Wherein: 1-general structure; 2-voxel unit; 3-a functional component; 4, connecting blocks; 5-octahedral lattice unit 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: the embodiment is described with reference to fig. 1 to fig. 12, and the voxelized ordered porous structure in the embodiment includes a plurality of voxel modules, the voxel modules are fixedly connected in parallel along the length direction, the voxel module includes a plurality of voxel units 2 arranged in a matrix shape, the voxel unit 2 includes a functional component 3 and a plurality of connecting blocks 4, the connecting blocks 4 are uniformly distributed and symmetrically and fixedly connected to the outer edge of the functional component 3, and two adjacent connecting blocks 4 are fixedly connected between every two adjacent voxel units 2.
The second embodiment is as follows: the present embodiment is described with reference to fig. 1 to 12, the voxel module according to the present embodiment includes a plurality of sets of voxel units 2, 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 same type or a plurality of different type voxel units 2. Technical features not disclosed in the present embodiment are the same as those of the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 1 to 12, and the connection block 4 of the present embodiment is provided at an end portion or a middle portion of the functional module 3. Technical features not disclosed in the present embodiment are the same as those of the first embodiment.
The fourth concrete implementation mode: in the present embodiment, the functional component 3 is a lattice-supporting structure or a metamaterial structure, which is described with reference to fig. 1 to 12. The technical features not disclosed in this embodiment are the same as those of the first, second, or third embodiment.
The fifth concrete implementation mode: in the present embodiment, the functional element 3 is an octahedral lattice unit structure, a multistable lattice unit structure, or a negative poisson ratio lattice unit structure, which is described with reference to fig. 1 to 12. The features not disclosed in the present embodiment are the same as those of the fourth embodiment.
The sixth specific implementation mode: the present embodiment will be described with reference to fig. 1 to 12, and the number of the connection blocks 4 in each voxel unit 2 in the present embodiment is six. The technical features not disclosed in this embodiment are the same as those of the first, second, third or fifth embodiment.
The seventh embodiment: the embodiment is described with reference to fig. 1 to fig. 12, and the voxelized ordered porous structure of the embodiment further includes two skins 8, where the skins 8 are respectively disposed on the inner side and the outer side of the plurality of voxel modules. The technical features not disclosed in the present embodiment are the same as those of the sixth embodiment.
The specific implementation mode is eight: the embodiment is described with reference to fig. 1 to 12, and the skin 8 and the voxel module are bonded together in this embodiment. Technical features not disclosed in the present embodiment are the same as those of the first embodiment.
The specific implementation method nine: the present embodiment is described with reference to fig. 1 to 12, and the method for modularly assembling a voxelized ordered porous structure according to the present embodiment includes the following steps:
step one, fixedly connecting a plurality of voxel units 2 into a group of voxel units 2 in sequence through a manipulator;
secondly, sequentially fixing a plurality of groups of voxel units 2 into voxel modules along the thickness direction through a manipulator;
thirdly, sequentially fixing a plurality of voxel modules into a porous structure along the length direction through a manipulator;
and fourthly, fixedly connecting skin 8 on the inner side and the outer side of the porous structure to prepare a sandwich structure.
The detailed implementation mode is ten: in the first step, the second step, the third step and the fourth step of the present embodiment, the fixing method is welding or gluing. The technical features not disclosed in the present embodiment are the same as those of the ninth embodiment.
The mode of production of the voxel unit 2 is not limited in the present embodiment, and it may be produced in a variety of ways, either integrally or separately.
The functional component 3 is mainly designed into a lattice bearing structure according to the functional requirements of the structure, such as an octahedral lattice unit cell structure voxel unit 5; or a multifunctional material structure, such as a multistable lattice unit of unit cell structure voxel unit 6 and a negative poisson ratio lattice unit of unit cell structure voxel unit 7; the connecting block 4 is mainly used for connecting different voxel units 2 to form a structural whole.
The voxel units 2 can be singly connected to form a single functional structure, and different voxel units 2 can be connected to form a multifunctional integrated structure. The sandwich structure with the plane or curved surface skin 8 can be prepared according to different voxels of the connecting block 4.
The voxel unit 2 can be automatically assembled by a mechanical arm without manual operation, and the production efficiency is high.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A voxelized ordered porous structure, characterized by: the voxel module comprises a plurality of voxel modules which are fixedly connected in parallel along the length direction, the voxel modules comprise a plurality of voxel units (2) which are arranged in a matrix shape, each voxel unit (2) comprises a functional component (3) and a plurality of connecting blocks (4), the connecting blocks (4) are uniformly distributed and symmetrically and fixedly connected to the outer side edge of the functional component (3), and every two adjacent voxel units (2) are fixedly connected with each other through two adjacent connecting blocks (4).
2. A voxelized ordered porous structure according to claim 1, characterized in that: the voxel module comprises a plurality of groups of voxel units (2), the groups of voxel units (2) are arranged in parallel along the thickness direction, and each group of voxel units (2) comprises a plurality of same or different types of voxel units (2).
3. A voxelized ordered porous structure according to claim 1, characterized in that: the connecting block (4) is arranged at the end part or the middle part of the functional component (3).
4. A voxelized ordered porous structure according to claim 1, 2 or 3, characterized in that: the functional component (3) is of a lattice bearing structure or a metamaterial structure.
5. A voxelized ordered porous structure according to claim 4, characterized in that: 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.
6. A voxelized ordered porous structure according to claim 1, 2, 3 or 5, characterized in that: the number of the connecting blocks (4) in each voxel unit (2) is six.
7. The voxelized ordered porous structure of claim 1, wherein: the voxelized ordered porous structure further comprises two skins (8), and the skins (8) are respectively arranged on the inner side and the outer side of the voxel modules.
8. A voxelized ordered porous structure according to claim 7, characterized in that: the skin (8) and the voxel module are connected in a gluing mode.
9. A modular assembly method using a voxelized ordered porous structure according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
step one, a plurality of voxel units (2) are fixedly connected into a group of voxel units (2) in sequence through a manipulator;
secondly, sequentially fixedly connecting a plurality of groups of voxel units (2) into voxel modules along the thickness direction through a mechanical arm;
thirdly, sequentially fixing a plurality of voxel modules into a porous structure along the length direction through 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.
10. The method of modular assembly of a voxelized ordered porous structure according to claim 9, characterized in that: in the first step, the second step, the third step and the fourth step, the fixing mode is welding or gluing.
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