CN110985872B

CN110985872B - Part with lattice structure, lattice structure and lattice cell element

Info

Publication number: CN110985872B
Application number: CN201911342709.9A
Authority: CN
Inventors: 温伟斌; 段晟昱; 方岱宁
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2021-02-02
Anticipated expiration: 2039-12-23
Also published as: CN110985872A

Abstract

The invention relates to the technical field of material structures, in particular to a part with a dot matrix structure, the dot matrix structure and a dot matrix cell. The lattice cell is a plate lattice cell with a hollow structure and composed of a plurality of plates, when a load is applied, the plurality of plates deform together, the load is borne by the plurality of plates together, and the stress distribution is more uniform and has more excellent mechanical properties compared with a same-mass lattice structure formed by connecting rod pieces, and particularly, the lattice cell has advantages in modulus, strength and energy absorption. The lattice structure is formed by a plurality of plate type lattice cell arrays in a distributed mode, so that the stress distribution is more uniform, and the lattice structure has more excellent mechanical properties. At least part of the lattice part is of a lattice structure, so that the specific rigidity and the specific strength of the part are improved while the weight is reduced, the reliability of the part is improved, and the stress concentration of the part is greatly reduced.

Description

Part with lattice structure, lattice structure and lattice cell element

Technical Field

The invention relates to the technical field of material structures, in particular to a part with a dot matrix structure, the dot matrix structure and a dot matrix cell.

Background

The lattice structure belongs to one of porous materials and structures, and has the advantages of low density, specific stiffness, specific strength and high specific energy absorption, so that parts with the lattice structure have the characteristic of light weight, and are applied to many fields, for example, in the aerospace field, the structure weight belongs to an important index.

The lattice structure is formed by a plurality of cell arrays, and the lattice cells are mostly formed by multi-rods, generally formed by rods in a certain symmetrical form in space. For example, application No. 201610623926.5, patent application name: the utility model provides a fretwork cell cube in the patent application that is arranged in fretwork cell cube that metal 3D printed and has part of this cell cube hollow cell cube, it includes major structure and extension structure, major structure includes the dodecahedron structure of using the main part rib to constitute as the arris, and extension structure includes the extension rib of the body diagonal direction outside extension from the dodecahedron to obtain the rhombohedral dodecahedron lattice structure that has central symmetry, and then be applied to it and realize losing weight of part structure in the part.

However, due to the lattice structure formed by the rod members, the rod members are bent when stressed, and stress concentration is likely to occur at the junctions of the rod members, so that the lattice structure formed by the rod members is often low in material utilization rate, and cannot fully exert the characteristics of high specific stiffness and high specific strength of the structure.

Disclosure of Invention

Technical problem to be solved

An object of the present invention is to provide a new lattice structure, which solves the problem of the existing lattice structure that stress concentration is easy to occur when a force is applied.

(II) technical scheme

In order to solve the above technical problem, a first aspect of the present invention provides a dot matrix cell, which in a first implementation manner includes four reference plates located on a same plane, where the four reference plates are arranged in parallel at intervals;

between two adjacent reference plates, one side edge of each reference plate close to the other side is provided with two inclined plates, the two inclined plates and the reference plates are arranged in an obtuse-angle inclined mode, one inclined plate is an upper inclined plate, the upper inclined plate extends upwards in an inclined mode and is close to the adjacent reference plate, the other inclined plate is a lower inclined plate, the lower inclined plate extends downwards in an inclined mode and is close to the adjacent reference plate, the two upper inclined plates are connected above the interval of the two adjacent reference plates to form four upper connection positions, and the two lower inclined plates are connected below the interval of the two adjacent reference plates to form four lower connection positions;

each upper joint is provided with an upper vertical plate along the joint line, and each lower joint is provided with a lower vertical plate along the joint line;

an upper connecting plate is arranged between every two adjacent upper vertical plates and used for connecting the two adjacent upper vertical plates, and a lower connecting plate is arranged between every two adjacent lower vertical plates;

an upper filling plate is arranged among each reference plate, two upper inclined plates connected with the reference plate, two upper vertical plates respectively connected with the two upper inclined plates and an upper connecting plate connecting the two upper vertical plates, and gaps among the plates are filled;

a lower filling plate is arranged among each reference plate, two lower inclined plates connected with the reference plate, lower vertical plates respectively connected with the two lower inclined plates and a lower connecting plate connected with the two lower vertical plates, and gaps among the plates are filled;

two upper inclined plates and two lower inclined plates between every two adjacent reference plates form a circumferential cavity in a surrounding mode, four circumferential cavities are formed between the four reference plates in a conformal mode, an upper cavity is formed between the four upper connecting plates in a surrounding mode, a lower cavity is formed between the four lower connecting plates in a surrounding mode, and the upper cavity, the lower cavity and the four circumferential cavities are communicated through the inner cavity of the dot matrix cell element.

With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect of the present invention, the cross section of the reference plate, the upper inclined plate, the lower inclined plate, the upper vertical plate, the lower vertical plate, the upper connecting plate, and/or the lower connecting plate is a variable cross section.

With reference to the first implementation manner of the first aspect, in a third implementation manner of the first aspect of the present invention, the cross sections of the reference plate, the upper inclined plate, the lower inclined plate, the upper vertical plate, the lower vertical plate, the upper connecting plate, and/or the lower connecting plate are equal cross sections.

With reference to any one implementation manner of the first implementation manner to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect of the present invention, intervals between two adjacent reference plates are the same.

With reference to any one of the first to fourth implementation manners of the first aspect, in a fifth implementation manner of the first aspect of the present invention, holes and/or grooves are formed in the reference plate, the upper inclined plate, the lower inclined plate, the upper vertical plate, the lower vertical plate, the upper connecting plate, and/or the lower connecting plate.

With reference to any one implementation manner of the first implementation manner to the fifth implementation manner of the first aspect, in a sixth implementation manner of the first aspect of the present invention, the lattice cell is a centrosymmetric structure.

A second aspect of the invention provides a lattice cell which is shear-deformed or twist-deformed in accordance with any one of the implementations of the first aspect.

A third aspect of the present invention provides a lattice structure, wherein in a first implementation form, the lattice structure comprises a plurality of lattice cells in any implementation form of the first aspect or the second aspect of the present invention, and the plurality of lattice cells are arranged in an array along at least one direction.

With reference to the first implementation manner of the third aspect of the present invention, in a second implementation manner of the third aspect of the present invention, a plurality of lattice cells are distributed along a spatial cartesian coordinate system array.

A fourth aspect of the present invention provides a dot matrix component, at least a part of which is the dot matrix structure in any one of the implementations of the third aspect of the present invention.

(III) advantageous effects

The technical scheme of the invention has the following advantages: the lattice cell provided by the invention is a plate type lattice cell with a hollow structure, which is formed by a plurality of plates, when the lattice cell is loaded, the plurality of plates deform together, the load is borne by the plurality of plates together, and the stress distribution is more uniform than that of a same-mass lattice structure formed by connecting rod pieces, and the lattice cell also has more excellent mechanical properties, and particularly has advantages in modulus, strength and energy absorption.

The lattice structure provided by the invention is formed by the array distribution of a plurality of plate type lattice cells, when a load is applied, the plurality of plates deform together, the load is borne by the plurality of plates together, the stress distribution is more uniform compared with the same-mass lattice structure formed by connecting rod pieces, the lattice structure also has more excellent mechanical properties, and particularly has more advantages in modulus, strength and energy absorption.

The lattice component provided by the invention can reduce weight, improve the specific rigidity and specific strength of the component, improve the reliability of the component and greatly reduce the stress concentration of the component.

Drawings

The drawings of the present invention are provided for illustrative purposes only, and the proportion and the number of the components in the drawings do not necessarily correspond to those of an actual product.

FIG. 1 is a schematic diagram of a lattice cell according to one embodiment of the present invention;

fig. 2 is a schematic top view of a lattice cell structure according to one embodiment of the present invention;

FIG. 3 is a schematic bottom view of a lattice cell structure according to one embodiment of the present invention;

FIG. 4 is a schematic half-sectional view of a lattice cell structure according to one embodiment of the present invention;

FIG. 5 is a schematic diagram of another lattice cell structure in accordance with one embodiment of the present invention;

FIG. 6 is a schematic diagram of a lattice cell structure according to one embodiment of the present invention;

FIG. 7 is a schematic diagram of another lattice cell structure according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of another lattice cell according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of another lattice cell structure in accordance with one embodiment of the present invention;

fig. 10 is a schematic cross-sectional view of a panel of a midpoint array cell according to an embodiment of the invention;

fig. 11 is another schematic cross-sectional view of a panel of a lattice cell according to an embodiment of the invention;

FIG. 12 is a stress-strain plot of the present invention lattice cell structure versus two prior art lattice cell structures;

figure 13 is a graph comparing the compressive modulus, compressive strength and specific energy absorption of the present invention lattice cell structure with two prior lattice cell structures of the same mass;

FIG. 14 is a schematic diagram of a lattice cell structure according to a second embodiment of the present invention;

FIG. 15 is a schematic view of another lattice cell structure according to the second embodiment of the present invention;

FIG. 16 is a schematic diagram of another lattice cell structure according to a second embodiment of the present invention;

FIG. 17 is a schematic diagram of a lattice structure in the third embodiment of the present invention;

FIG. 18 is a schematic view showing the structure of a lattice fork member in a fourth embodiment of the present invention;

FIG. 19 is a schematic view of the construction of a conventional fork part;

FIG. 20 is a schematic structural diagram of a lattice cylinder component according to a fourth embodiment of the present invention;

fig. 21 is a schematic structural view of a conventional cylindrical part.

In the figure: 100: a dot matrix cell;

101: a first reference plate; 102: a second reference plate; 103: a third reference plate; 104: a fourth reference plate;

105: a first upper sloping plate; 106: a second upper sloping plate; 107: a third upper sloping plate; 108: a fourth upper sloping plate; 109: a fifth upper sloping plate; 110: a sixth upper sloping plate; 111: a seventh upper sloping plate; 112: an eighth upper sloping plate;

113: a first lower sloping plate; 114: a second lower sloping plate; 115: a third lower sloping plate; 116: a fourth lower sloping plate; 117: a fifth lower sloping plate; 118: a sixth lower sloping plate; 119: a seventh lower sloping plate; 120: an eighth lower sloping plate;

121: a first upper riser; 122: a second upper riser; 123: a third upper riser; 124: a fourth upper riser;

125: a first upper connecting plate; 126: a second upper connecting plate; 127: a third upper connecting plate; 128: a fourth upper connecting plate;

129: a first lower vertical plate; 130: a second lower vertical plate; 131: a third lower vertical plate; 132: a fourth lower vertical plate;

133: a first lower connecting plate; 134: a second lower connecting plate; 135: a third lower connecting plate; 136: a fourth lower connecting plate;

137: a first upper infill panel; 138: a second upper infill panel; 139: a third upper infill panel; 140: a fourth upper infill panel;

141: a first lower infill panel; 142: a second lower infill panel; 143: a third infill panel; 144: a fourth infill panel;

200: and (3) lattice structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Example one

As shown in fig. 1 to 4, a dot matrix cell 100 according to an embodiment of the invention includes four reference plates located on the same plane, and the four reference plates are arranged in parallel at intervals, as shown in fig. 1 and 2, one of the reference plates is a first reference plate 101, and a second reference plate 102, a third reference plate 103, and a fourth reference plate 104 are sequentially arranged from the first reference plate 101 to the back in a clockwise direction.

Between two adjacent reference plates, one side of each reference plate close to the other side is provided with two inclined plates, the two inclined plates and the reference plates are obliquely arranged at an obtuse angle, one inclined plate is an upper inclined plate, and the upper inclined plate extends obliquely upwards and is close to the adjacent reference plate at the same time, namely the upper inclined plate is obliquely arranged obliquely upwards; the other swash plate is a lower swash plate that extends obliquely downward and is also disposed adjacent to the adjacent reference plate, i.e., the upper swash plate is obliquely downward.

Referring to fig. 1, 3 and 4, the two inclined plates of the first reference plate 101 on the side close to the second reference plate 102 are respectively a first upper inclined plate 105 and a first lower inclined plate 113, the two inclined plates of the second reference plate 102 on the side close to the first reference plate 101 are respectively a second upper inclined plate 106 and a second lower inclined plate 114, and the subsequent inclined plates are sequentially defined in the clockwise direction, for example, the two inclined plates of the second reference plate on the side close to the third reference plate are respectively a third upper inclined plate 103 and a third lower inclined plate 115; the two inclined plates provided on the side of the first reference plate 101 close to the fourth reference plate 104 are an eighth upper inclined plate 112 and an eighth lower inclined plate 120, respectively.

Each upper inclined plate and each lower inclined plate extend obliquely towards the direction close to the adjacent reference plate, so that in the interval of one adjacent reference plate, the upper inclined plates are jointed above the interval of the two adjacent reference plates to form an upper joint; the lower sloping plate meets below the interval between two adjacent reference plates to form a lower joint. Referring to fig. 1, 2, and 4, a joint formed by the first upper swash plate 105 and the second upper swash plate 106 is a first upper joint, a joint formed by the first lower swash plate 113 and the second lower swash plate 114 is a first lower joint, a joint formed by the third upper swash plate 107 and the fourth upper swash plate 108 is a second upper joint, a joint formed by the third lower swash plate 115 and the fourth lower swash plate 116 is a second lower joint, a joint formed by the fifth upper swash plate 109 and the sixth upper swash plate 110 is a third upper joint, a joint formed by the fifth lower swash plate 117 and the sixth lower swash plate 118 is a third lower joint, a joint formed by the seventh upper swash plate 111 and the eighth upper swash plate 112 is a fourth upper joint, and a joint formed by the seventh lower swash plate 119 and the eighth lower swash plate 120 is a fourth lower joint.

Referring to fig. 1, 2 and 4, an upper riser is provided along the connecting line from the first upper connecting point to the fourth upper connecting point, and the upper risers are a first upper riser 121, a second upper riser 122, a third upper riser 123 and a fourth upper riser 124 in the clockwise direction. All have a riser downwards along the handing-over line in first handing-over department to fourth lower handing-over department, according to clockwise in proper order for first riser 129, second riser 130, third riser 131 and fourth riser 132.

The upper riser is arranged upwards in a whole manner, and the lower riser is arranged downwards in a whole manner, but in some embodiments, both the upper riser and the lower riser can have a certain inclination angle relative to the reference plate, for example, the inclination angles can be 50 °, 60 °, 70 °, 80 °, 90 °, 100 °, 110 °, 120 ° and 130 ° with respect to the reference plate, and generally speaking, the upper riser and the lower riser can be not parallel to the reference plate. Preferably, the upper and lower risers are inclined at an angle of 60 ° to 120 ° to the reference plate, and more preferably, the upper and lower risers are both disposed at 90 ° to the reference plate. That is, referring to fig. 1 and 2, the first to fourth upper risers 121 to 124 and the first to fourth lower risers 129 to 132 are perpendicular to the reference plate.

An upper connecting plate is arranged between every two adjacent upper vertical plates and used for connecting the two adjacent upper vertical plates. Referring to fig. 1 and 2, the first upper riser 121 and the second upper riser 122 are connected by a second upper connecting plate 126, the second upper riser 122 and the third upper riser 123 are connected by a third upper connecting plate 127, the third upper riser 123 and the fourth upper riser 124 are connected by a fourth upper connecting plate 128, and the fourth upper riser 124 and the first upper riser 121 are connected by a first upper connecting plate 125.

And a lower connecting plate is arranged between every two adjacent lower vertical plates and used for connecting the two adjacent lower vertical plates. Referring to fig. 1 and 3, the first lower riser 129 and the second lower riser 130 are connected by a second lower connecting plate 134, the second lower riser 130 and the third lower riser 131 are connected by a third lower connecting plate 135, the third lower riser 131 and the fourth lower riser 132 are connected by a fourth lower connecting plate 136, and the fourth lower riser 132 and the first lower riser 129 are connected by a first lower connecting plate 133.

Of course, in some embodiments in which the upper and lower risers are inclined from the reference plate, when the inclination angle reaches a certain degree and the size is sufficient, there will be a contact between the adjacent upper and lower risers (the upper end of the upper connecting plate and the lower end of the lower connecting plate) and the upper and lower connecting plates mainly serve to connect the remaining non-contact portions.

An upper filling plate is arranged between each reference plate, two upper inclined plates connected with the reference plate, two upper vertical plates respectively connected with the two upper inclined plates and an upper connecting plate connecting the two upper vertical plates, and gaps among the plates are filled. Referring to fig. 1, 2, and 4, in the present embodiment, a first upper filling plate 137 is provided between the first reference plate 101, the first upper sloping plate 105, the eighth upper sloping plate 112, the first upper riser 121, the fourth upper riser 124, and the first upper connecting plate 125, and fills a gap between the plates. Similarly, a second upper packing plate 138 is provided between the second reference plate 102 and its associated plates, a third upper packing plate 139 is provided between the third reference plate 103 and its associated plates, and a fourth upper packing plate 140 is provided between the fourth reference plate 104 and its associated plates.

A lower filling plate is arranged between each reference plate, two lower inclined plates connected with the reference plate, two lower vertical plates respectively connected with the two lower inclined plates and a lower connecting plate connected with the two lower vertical plates, and gaps among the plates are filled. Referring to fig. 1, 3 and 4, in the present embodiment, a first lower filling plate 141 is provided between the first reference plate 101, the first lower sloping plate 113, the eighth lower sloping plate 120, the first lower riser 129, the fourth lower riser 132 and the first lower connecting plate 133 to fill the gap between the plates. Similarly, a second underfill plate 142 is provided between the second reference plate 102 and its associated plates, a third underfill plate 143 is provided between the third reference plate 103 and its associated plates, and a fourth underfill plate 144 is provided between the fourth reference plate 104 and its associated plates.

Referring to fig. 1-4, a circumferential cavity is defined by two upper inclined plates and two lower inclined plates between every two adjacent reference plates, four circumferential cavities are formed between the four reference plates, a first circumferential cavity, a second circumferential cavity, a third circumferential cavity and a fourth circumferential cavity are respectively defined in a clockwise direction, an upper cavity is defined between the four upper connecting plates, a lower cavity is defined by the four lower connecting plates, and the upper cavity, the lower cavity and the four circumferential cavities are communicated by an internal cavity of a cell array to form a plate-type lattice cell with a hollow structure.

When the plate type lattice cell element with the hollow structure is loaded, the plurality of plates deform together, the load is borne by the plurality of plates together, the stress distribution is more uniform compared with a same-mass lattice structure formed by connecting rod pieces, the bar type lattice cell element also has more excellent mechanical properties, and particularly has advantages in modulus, strength and energy absorption.

Referring to fig. 1 to 4, in one embodiment of the present invention, each of the plates constituting the dot matrix cell is a flat plate structure with a uniform cross section, and the first reference plate 101 to the fourth reference plate 104, the first upper riser 121 to the fourth upper riser 124, and the first lower riser 129 to the fourth lower riser 132 are flat plates with a chamfer, and the upper inclined plate and the lower inclined plate connected thereto have a width to a chamfer. Referring to fig. 1, taking the first upper filling plate 137 and its surrounding plates as an example for illustration, the first reference plate 101 is a flat plate with one chamfer, the first upper sloping plate 105 and the eighth upper sloping plate 112 are respectively connected to both sides of the chamfer of the first reference plate 101, the first upper sloping plate 105 and the first upper connecting plate 125 are respectively connected to both sides of the chamfer of the first upper riser 121, and the eighth upper sloping plate 112 and the first upper connecting plate 125 are respectively connected to both sides of the chamfer of the fourth upper riser 124, so that the first upper filling plate 137 between the first reference plate 101, the first upper sloping plate 105, the eighth upper sloping plate 112, the first upper riser 121, the first upper connecting plate 125 and the fourth upper riser 124 is a non-equilateral hexagonal flat plate. Similarly, the connection relationship and shape of the second to fourth upper filling plates 138 to 140, the first to fourth lower filling plates 141 to 144, and the peripheral plates thereof are the same as the first upper filling plate 137 and the connected plates, and are not described herein again. Referring to fig. 5, in one embodiment, the first to fourth reference plates 101 to 104, the first to fourth upper risers 121 to 124, and the first to fourth lower risers 129 to 132 are each a quadrilateral flat plate, and each of the filler plates thereof is a triangular flat plate.

Referring to fig. 6-9, the spacing distance L between two adjacent reference plates is adjusted to maintain the overall size of the dot matrix cell₁Length L of the cross-connect line₂The shape and size of each plate can be changed, and the L is adjusted on the basis of the L shown in fig. 6 in fig. 7-9₁And L₂The resulting lattice cell. L in the figure_cThe length of the lattice cell is L, the length of the lattice cell in the horizontal and vertical directions when the lattice cell is in a central symmetrical structure_cThe same is true.

In some embodiments, the cross section of any one of the reference plate, the upper sloping plate, the lower sloping plate, the upper riser plate, the lower riser plate, the upper connecting plate and the lower connecting plate may be a variable cross section, for example, referring to fig. 10, both ends of the cross section become gradually larger toward the middle or referring to fig. 11, periodically changing from one end to the other end of the cross section.

In other embodiments, some of the plates of the lattice cell may have a constant cross section, and another portion of the plates may have a variable cross section, and the thickness of any one of the plates may be different.

In order to further reduce the weight of the lattice cell or to facilitate the fabrication, in some embodiments, holes or grooves may be formed in any or some or all of the reference plates, the upper sloping plate, the lower sloping plate, the upper riser, the lower riser, the upper connecting plate and the lower connecting plate. In some embodiments with grooves, grooves may be formed in one surface of the plate, grooves may be formed in two surfaces of the plate in a staggered manner, holes may be formed in a part of the plate, and grooves may be formed in another part of the plate, which is not limited in this embodiment.

In other embodiments, holes and grooves can be simultaneously formed in any one or more or all of the reference plate, the upper inclined plate, the lower inclined plate, the upper vertical plate, the lower vertical plate, the upper connecting plate and the lower connecting plate.

In some preferred embodiments, the interval between two adjacent reference plates is the same, so that the bearing performance is better and the stress distribution is more uniform.

In some preferred embodiments, the lattice cell is a centrosymmetric structure.

In any of the above embodiments, the thickness of any of the reference plate, the upper inclined plate, the lower inclined plate, the upper riser, the lower riser, the upper connecting plate, and the lower connecting plate may be adjusted.

The same mass of the flat-panel lattice cell structure of the invention and the existing lattice cell structure formed by combining the rods are respectively subjected to strength test. Specifically, three lattice structures are selected for comparative study, wherein the first lattice cell structure is a flat plate type lattice cell structure in the invention, the second lattice cell structure is a Rhombic Dodecahedron (RD) lattice cell structure formed by combining equal-diameter round rods, and the third lattice cell structure is a Body Centered Cubic (BCC) lattice cell structure formed by combining equal-diameter round rods. The three lattice cell elements are all made of stainless steel materials through 3D printing, the mass of the first lattice cell element structure is 156g, the mass of the second rhombic dodecahedron lattice structure is 170g, and the mass of the third body-centered cubic lattice structure is 161g, and the three lattice structures are subjected to experiments and result comparison. The nominal stress-strain curve obtained by the mechanical compression experiment is shown in fig. 12. According to experimental results, under the condition of lower quality, the stress-strain curve of the lattice cell structure disclosed by the invention is greatly higher than the stress-strain curves of the two rod piece lattices, the compression modulus, the compression strength and the specific energy absorption of the three structures are quantitatively compared in a graph 13, and as is obvious from the graph, compared with the traditional rhombic dodecahedron rod piece lattice, the modulus of the lattice cell disclosed by the invention is improved by 216%, the strength is improved by 191%, the energy absorption is improved by 163%, the mechanical property is greatly improved, and the stress distribution of the lattice cell structure disclosed by the invention is more uniform in structural damage degree, so that the problem of stress concentration of the lattice structure formed by the traditional rod pieces at the connection positions of the rod pieces is solved, and the bearing capacity of the lattice cell structure can be fully exerted.

Example two

As shown in fig. 14 to 16, the lattice cell provided in the second embodiment is a modified structure of the lattice cell provided in the first embodiment, which can be modified based on any implementation manner in the first embodiment. Fig. 14 shows a dot matrix cell after stretching and deforming the dot matrix cell according to one embodiment. Referring to fig. 15, a lattice cell is shown after shear deformation of a lattice cell according to one embodiment. Referring to fig. 16, a twisted lattice cell of one embodiment of the lattice cell is shown.

In the case of the tensile deformation of the lattice cells, the axial stretching of the lattice cells may be understood as a case of changing the plate size in the stretching direction, and the diagonal stretching of the lattice cells may be understood as a case of the shear deformation.

EXAMPLE III

Referring to fig. 17, the lattice structure 200 provided in this embodiment includes a plurality of lattice cells 100 according to any one of the first embodiment or the second embodiment, and each of the lattice cells 100 is arranged in an array along at least one direction according to the size and the structural requirement, for example, in a space cartesian coordinate system, the lattice cells 100 may be arranged in an array along either direction X, Y or Z, along any two directions of X, Y or Z, or along directions X, Y and Z.

Example four

In the dot matrix component provided in this embodiment, at least a part of the dot matrix component is the dot matrix structure 200 in any one of the three embodiments of the embodiment. Fig. 19 is a conventional fork element, and fig. 18 is a dot matrix element formed by replacing the middle portion of the element of fig. 19 with a dot matrix structure 200.

Fig. 21 shows a conventional cylinder part structure, and fig. 20 shows a dot matrix part formed by replacing the whole part of fig. 21 with a dot matrix structure 200.

The lattice structure of the invention can reduce weight, improve the specific rigidity and specific strength of parts, improve the reliability of parts and greatly reduce the stress concentration of parts.

The dot matrix part provided by the invention can be manufactured by a 3D printing technology, and the main manufacturing process and flow are as follows:

1) drawing a part containing a lattice structure through three-dimensional modeling software, and exporting a three-dimensional model of the part into a universal three-dimensional model file format;

2) importing the exported three-dimensional model file into 3D printing subdivision software, automatically performing layered subdivision through the software and importing the subdivided discrete file into 3D printing equipment;

3) processing by 3D printing equipment, and stacking materials layer by layer until the part is completely molded;

4) the part is removed from the 3D printing apparatus and the support material is removed.

Specifically, taking the fork frame type part shown in fig. 16 as an example, when manufacturing the metal fork frame lattice part, the three-dimensional modeling software is used to array the flat lattice cell in a three-dimensional space along a cartesian coordinate system to form a lattice structure, and then the lattice structure and the fork frame connector are established as an entity through boolean operations, and a three-dimensional model thereof is derived. And then, introducing the three-dimensional model into metal 3D printing equipment, dispersing the three-dimensional model into layers by software carried by the metal 3D printing equipment and introducing the layers into a manufacturing program, then repeatedly spreading powder layer by layer and carrying out laser melting forming layer by the printing equipment, and repeatedly processing layer by layer until the three-dimensional model is completely formed.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: each embodiment does not include only one independent technical solution, and in the case of no conflict between the solutions, the technical features mentioned in the respective embodiments can be combined in any way to form other embodiments which can be understood by those skilled in the art.

Furthermore, modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the scope of the present invention, and the essence of the corresponding technical solutions does not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dot matrix cell, comprising: the device comprises four reference plates positioned on the same plane, wherein the four reference plates are arranged in parallel at intervals;

between two adjacent reference plates, two inclined plates are arranged on one side edge of each reference plate close to the other side, the two inclined plates and the reference plates are arranged in an obtuse-angle inclined mode, one inclined plate is an upper inclined plate, the upper inclined plate extends upwards in an inclined mode and is close to the adjacent reference plate, the other inclined plate is a lower inclined plate, the lower inclined plate extends downwards in an inclined mode and is close to the adjacent reference plate, the two upper inclined plates are connected above the interval of the two adjacent reference plates to form four upper connection positions, and the two lower inclined plates are connected below the interval of the two adjacent reference plates to form four lower connection positions;

each upper junction is provided with an upper vertical plate along the junction line, and each lower junction is provided with a lower vertical plate along the junction line;

an upper connecting plate is arranged between every two adjacent upper risers and is used for connecting the two adjacent upper risers, and a lower connecting plate is arranged between every two adjacent lower risers;

an upper filling plate is arranged among each reference plate, two upper inclined plates connected with the reference plate, two upper vertical plates respectively connected with the two upper inclined plates and an upper connecting plate connected with the two upper vertical plates, and gaps among the plates are filled;

2. The lattice cell of claim 1, wherein: the cross sections of the reference plate, the upper inclined plate, the lower inclined plate, the upper vertical plate, the lower vertical plate, the upper connecting plate and/or the lower connecting plate are variable cross sections.

3. The lattice cell of claim 1, wherein: the cross sections of the reference plate, the upper inclined plate, the lower inclined plate, the upper vertical plate, the lower vertical plate, the upper connecting plate and/or the lower connecting plate are equal cross sections.

4. The lattice cell of any one of claims 1-3, wherein: the interval between two adjacent reference plates is the same.

5. The lattice cell of any one of claims 1-3, wherein: holes and/or grooves are formed in the reference plate, the upper inclined plate, the lower inclined plate, the upper vertical plate, the lower vertical plate, the upper connecting plate and/or the lower connecting plate.

6. The lattice cell of claim 1, wherein: the lattice cell is a centrosymmetric structure.

7. A dot matrix cell, comprising: subjecting the lattice cell of any one of claims 1 to 6 to shear deformation or torsional deformation in its entirety.

8. A lattice structure characterized by: comprising a plurality of the lattice cells of any one of claims 1 to 7, the plurality of lattice cells being arranged in an array in at least one direction.

9. The lattice structure of claim 8, wherein: a plurality of the lattice cells are distributed along a space Cartesian coordinate system array.

10. A dot matrix component characterized by: the lattice component having at least a portion of the lattice structure of claim 8 or 9.