Structure for connecting interlayer interfaces of 3D printing test pieces

Abstract

The utility model belongs to the technical field of concrete 3D printing, and relates to a structure for connecting an interlayer interface of a 3D printing test piece, which comprises a first reinforcing piece for connecting the 3D printing test piece, and the 3D printing test piece is formed by laminating at least two layers of 3D printing test piece bodies; the first reinforcing piece penetrates through at least two layers of 3D printing test piece bodies in the stacking direction of the 3D printing test piece bodies; according to the 3D printing test piece disclosed by the utility model, through the first reinforcing piece, interlayer interfaces of multiple layers of 3D printing test pieces can be conveniently connected to form a whole, and the interlayer bonding strength of the 3D printing test pieces is enhanced, so that when the 3D printing test pieces are subjected to external force, the layers are not easy to separate or slide, the stress and the force transfer are continuous at the interlayer interfaces, and the structural reliability of the 3D printing test pieces is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete 3D printing, and particularly to a structure for connecting interlayer interfaces of 3D printed specimens. Background Art

[0002] In the 1990s, 3D printing technology began to move towards commercialization and gradually covered various fields such as medicine, aerospace, automobile manufacturing, and construction. In the past decade, 3D printing concrete technology has attracted the attention of researchers from various countries and has developed rapidly due to its moldless process, fast molding speed, good comprehensive benefits, environmental friendliness, intelligence, and high degree of precision. It has now gradually been applied to actual engineering construction.

[0003] Referring to the patent document with application number 202220836655.2, a 3D printed reinforced concrete special-shaped building component is disclosed, including a special-shaped building component body, the special-shaped building component body is provided with one or more concrete layers, the concrete layer is cast by concrete sprayed from a printing nozzle, and the concrete layers are cast together by concrete; transversely arranged transverse steel bars and longitudinally arranged longitudinal steel bars are uniformly inserted inside the concrete layer; the transverse steel bars and the longitudinal steel bars pass through the outside of the concrete layer; the transverse steel bars and the longitudinal steel bars are stacked to form a quadrilateral through hole, and the concrete sprayed from the printing nozzle is poured together. Concrete flows through the through holes; when using 3D printed concrete, first, the designer designs the building model through the computer, and the model exists in the form of data inside the computer. Then, the data is transmitted to the 3D printer and converted into specific printing instructions. After receiving the instructions, the printer begins to print concrete layer by layer. The printer prints layer by layer through the print nozzle. When the first concrete layer is printed, the 3D printing that automatically executes the printing program pauses printing. At the same time, the workers press the pre-manufactured transverse and longitudinal steel bars into the first concrete layer. In this way, multiple printings are performed until the entire 3D printing is completed.

[0004] With regard to the above-mentioned related technologies, in the process of printing concrete using 3D printing technology, concrete is printed layer by layer, and there is an interlayer interface between two adjacent first concrete layers. There is a technical problem of discontinuous force and force transmission in the interlayer interface, which causes the interlayer interface bonding force to be weaker than the strength of the concrete layer, thereby reducing the reliability of 3D printed concrete components. Utility Model Content

[0005] In order to solve the technical problem of discontinuity in force and force transmission in the interlayer interface in the background technology, the utility model provides a structure for connecting the interlayer interface of a 3D printed specimen.

[0006] The utility model is used for connecting the structure of the interlayer interface of the 3D printed specimen. Through the first reinforcement member, the interlayer interface of the multi-layer 3D printed specimen is conveniently connected to form a whole, thereby enhancing the interlayer bonding strength of the 3D printed specimen, so that when the 3D printed specimen is subjected to external force, the layers are not easily separated or slipped. At the interlayer interface, the force is received and transmitted continuously, thereby improving the structural reliability of the 3D printed specimen.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A structure for connecting the interface between layers of a 3D printed specimen, comprising a first reinforcing member for connecting the 3D printed specimen, wherein the 3D printed specimen is formed by stacking at least two layers of 3D printed specimen bodies; the first reinforcing member passes through at least two layers of the 3D printed specimen bodies along the stacking direction of the 3D printed specimen bodies.

[0009] In a specific feasible implementation scheme, a plurality of second reinforcement members are fixedly connected to the first reinforcement member; the plurality of second reinforcement members are distributed along the axial direction of the first reinforcement member, two ends of the second reinforcement members are respectively located on both sides of the first reinforcement member, and there is an angle between the axial direction of the second reinforcement member and the axial direction of the first reinforcement member; the second reinforcement member is placed in the 3D printed specimen body.

[0010] In a specific embodiment, the plurality of second reinforcement members are evenly distributed along the axial direction of the first reinforcement member.

[0011] In a specific embodiment, the angle between the axial direction of the second reinforcement and the axial direction of the first reinforcement is 90°.

[0012] In a specific possible implementation manner, the distance between adjacent second reinforcement members is h, and h is equal to half of the total height of two adjacent 3D printed specimen bodies corresponding to the second reinforcement members.

[0013] In a specific possible implementation manner, the first reinforcement and the second reinforcement connected to the first reinforcement together form a connection assembly, and multiple rows of connection assemblies are arranged horizontally along the stacking direction of the 3D printed specimen body.

[0014] In a specific possible implementation scheme, multiple rows of connection components are arranged along the horizontal longitudinal direction of the stacking direction of the 3D printed specimen body.

[0015] In a specific feasible implementation scheme, the number of layers of the 3D printed specimen is n, the height of the 3D printed specimen body is D, and the width is L, the width L is the horizontal transverse direction along the stacking direction of the 3D printed specimen body, the height D is the horizontal longitudinal direction along the stacking direction of the 3D printed specimen body, the length of the first reinforcement is (n-0.5)D, and the length of the second reinforcement is (10% to 15%)L.

[0016] In a specific implementation manner, the diameter of the first reinforcement member and the diameter of the second reinforcement member are both (3% to 5%)L.

[0017] In a specific implementation manner, both the first reinforcement member and the second reinforcement member are provided with threads.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects:

[0019] 1. The utility model is used for connecting the structure of the interlayer interface of the 3D printed specimen. Through the first reinforcement member, it is convenient to connect the interlayer interfaces of the multi-layer 3D printed specimen to form a whole, thereby enhancing the interlayer bonding strength of the 3D printed specimen, so that when the 3D printed specimen is subjected to external force, the layers are not easy to separate or slide. At the interlayer interface, the force is received and transmitted continuously, thereby improving the structural reliability of the 3D printed specimen.

[0020] 2. The utility model is used for connecting the structure of the interface between layers of a 3D printed specimen. A plurality of second reinforcement members are distributed along the axial direction of the first reinforcement member, and there is an angle between the axial direction of the second reinforcement member and the axial direction of the first reinforcement member. Preferably, the axial angle between the axial direction of the second reinforcement member and the axial direction of the first reinforcement member is 90°, so that the contact area between the fishbone structure and the 3D printed specimen body is maximized, and loads from different directions are dispersed and borne to the maximum extent, thereby further improving the overall stability and load-bearing capacity of the 3D printed specimen.

[0021] 3. The utility model is used for connecting the structure of the interface between layers of 3D printed specimens. Multiple second reinforcement members are evenly distributed along the axial direction of the first reinforcement member, so that the first reinforcement member is evenly stressed in the axial direction, reducing the risk of local damage caused by stress concentration and improving the overall stability and bearing capacity of the 3D printed specimen.

[0022] 4. The utility model is used to connect the structure of the interlayer interface of the 3D printed specimen, and the distance between adjacent second reinforcement members is h, which is equal to half of the total height of the two adjacent 3D printed specimen bodies corresponding to the second reinforcement members, thereby maximizing the interlayer connection, facilitating the formation of tight mechanical locking between the multi-layer 3D printed specimen bodies, improving the interlayer adhesion, and thereby enhancing the overall stability of the 3D printed specimen.

[0023] 5. The utility model is used to connect the structure of the interlayer interface of the 3D printed specimen. Multiple rows of connecting components are arranged horizontally along the stacking direction of the 3D printed specimen body, so as to further enhance the interlayer tensile strength and shear strength of the 3D printed specimen and improve the overall stability of the 3D printed specimen.

[0024] 6. The utility model is used for connecting the structure of the interface between layers of 3D printed specimens. Multiple rows of connecting components are arranged along the horizontal longitudinal direction of the stacking direction of the 3D printed specimen body, which effectively disperses and bears stress from different directions, reduces stress concentration, and thus reduces the risk of structural damage due to stress concentration, making the 3D printed specimen more durable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the 3D printed test piece of the utility model.

[0026] Figure 2 It is a schematic diagram of the overall structure of the structure used for connecting the interfaces between layers of 3D printed specimens in the utility model.

[0027] Figure 3 It is a schematic diagram of the overall structure of the structure used to connect the interfaces between layers of 3D printed specimens in Utility Model Example 1.

[0028] Figure 4 It is a schematic diagram of the overall structure of the structure for connecting the interfaces between layers of 3D printed specimens according to Example 2 of the utility model.

[0029] Figure 5 It is a schematic diagram of the overall structure of the structure for connecting the interfaces between layers of a 3D printed specimen according to Example 3 of the utility model.

[0030] Figure 6 It is a schematic diagram of the overall structure of the structure for connecting the interfaces between layers of 3D printed specimens according to Example 4 of the utility model.

[0031] Figure 7 It is a schematic diagram of the overall structure of the structure used to connect the interfaces between layers of 3D printed specimens in Example 5 of the utility model.

[0032] Explanation of the accompanying drawings: 1. connecting component; 11. first reinforcement member; 12. second reinforcement member; 2. 3D printed specimen body. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-7 The utility model is described in further detail.

[0034] The utility model discloses a structure for connecting the interlayer interfaces of a 3D printed specimen.

[0035] Reference Figure 1 and Figure 2 A structure for connecting the interface between layers of a 3D printed specimen, comprising a first reinforcement member 11 for connecting the 3D printed specimen, the 3D printed specimen being formed by stacking at least two layers of a 3D printed specimen body 2, the first reinforcement member 11 passing through at least two layers of a 3D printed specimen body 2 along the stacking direction of the 3D printed specimen body 2, the 3D printed specimen body 2 in the utility model can be set to four layers, five layers, or six layers, as long as the 3D printed specimen is formed by stacking multiple layers of 3D printed specimen bodies 2; during the 3D printing process, the first reinforcement member 11 is vertically inserted into at least two layers of the 3D printed specimen body 2 and twisted at a small angle, the first reinforcement member 11 is engaged with the 3D printed specimen body 2, and a stable connection of the multiple layers of the 3D printed specimen body 2 is achieved.

[0036] Reference Figure 2 In order to enhance the interlayer tensile strength and shear strength of the 3D printed specimen, a plurality of second reinforcement members 12 are fixedly connected to the first reinforcement member 11, and the plurality of second reinforcement members 12 are distributed along the axial direction of the first reinforcement member 11. The two ends of the second reinforcement member 12 are respectively located on both sides of the first reinforcement member 11, and there is an angle between the axial direction of the second reinforcement member 12 and the axial direction of the first reinforcement member 11. The second reinforcement member 12 is placed in the 3D printed specimen body 2, wherein the second reinforcement member 12 corresponds to the 3D printed specimen body 2 one by one, and the plurality of second reinforcement members 12 and the first reinforcement member 11 form a fishbone structure; in the utility model, the angle between the second reinforcement member 12 and the first reinforcement member 11 can be 30°, 45°, or 90°, as long as the second reinforcement member 12 is arranged along the axial direction of the first reinforcement member 11 so that the second reinforcement member 12 and the first reinforcement member 11 form a fishbone structure, the interlayer tensile strength and shear strength of the 3D printed specimen are increased.

[0037] Reference Figure 2 In order to improve the interlayer bonding strength of the 3D printed specimen, the distance between adjacent second reinforcement members 12 is h, and h is equal to half of the total height of two adjacent 3D printed specimen bodies 2 corresponding to the second reinforcement members 12, thereby maximizing the interlayer connection, facilitating the formation of a tight mechanical lock between the multi-layer 3D printed specimen bodies 2, improving the interlayer bonding strength, and thus enhancing the overall stability of the 3D printed specimen.

[0038] Reference Figure 2 The first reinforcement member 11 and the second reinforcement member 12 connected to the first reinforcement member 11 together form a connection component 1. A plurality of rows of connection components 1 are arranged horizontally along the stacking direction of the 3D printed specimen body 2. In the utility model, the connection components 1 can be arranged in one row, two rows, or three rows, as long as the interlayer tensile strength and shear strength of the 3D printed specimen can be enhanced by the connection components 1.

[0039] Reference Figure 2 , the number of layers of the 3D printed specimen is n, the height of the 3D printed specimen body 2 is D, and the width is L, the width L is the horizontal transverse direction along the stacking direction of the 3D printed specimen body 2, the height D is the horizontal longitudinal direction along the stacking direction of the 3D printed specimen body 2, the length of the first reinforcement 11 is (n-0.5)D, the length of the second reinforcement 12 is (10%~15%)L, and the diameter of the first reinforcement 11 and the diameter of the second reinforcement 12 are both (3%~5%)L; at this optimal length, it can ensure that the first reinforcement 11 is fully inserted into the multi-layer 3D printed specimen, and all the second reinforcements 12 can form a good bite effect with the 3D printed specimen. At this optimal diameter, the contact area between the fishbone structure and the 3D printed concrete layer is maximized, which is convenient for enhancing the interlayer adhesion of the 3D printed specimen.

[0040] Reference Figure 1 In order to further improve the overall stability of the 3D printed specimen, threads are provided on the first reinforcement member 11 and the second reinforcement member 12 to further increase the friction resistance between the first reinforcement member 11 and the 3D printed specimen body 2, and the friction resistance between the second reinforcement member 12 and the 3D printed specimen body 2, thereby improving the overall stability of the 3D printed specimen.

[0041] Example 1

[0042] This embodiment is a structure for connecting the interface between layers of a 3D printed specimen, referring to Figure 3 In this embodiment, the axial angle between the second reinforcement 12 and the axial angle between the first reinforcement 11 is 90°, so that the contact area between the fishbone structure and the 3D printed specimen body 2 is maximized, and the loads from different directions are dispersed and borne as much as possible, further improving the overall stability and load-bearing capacity of the 3D printed specimen.

[0043] Example 2

[0044] This embodiment is a structure for connecting the interface between layers of a 3D printed specimen, referring to Figure 4 On the basis of Example 1, in this embodiment, a plurality of second reinforcement members 12 are evenly distributed along the axial direction of the first reinforcement member 11, so that the first reinforcement member 11 is evenly stressed in the axial direction, reducing the risk of local damage caused by stress concentration and improving the overall stability and bearing capacity of the 3D printed specimen.

[0045] Example 3

[0046] This embodiment is a structure for connecting the interface between layers of a 3D printed specimen, referring to Figure 5On the basis of Example 2, in this embodiment, the 3D printed specimen is formed by stacking six layers of 3D printed specimen bodies 2, and the second reinforcement members 12 are correspondingly set to six, wherein the height of the 3D printed specimen body 2 is 20m, and the width of the 3D printed specimen body 2 is 80m. Correspondingly, the distance between two adjacent second reinforcement members 12 is 20m, thereby maximizing the interlayer connection and improving the interlayer adhesion; the length of the first reinforcement member 11 is 110m, and the length of the second reinforcement member 12 can be 8~12m. In this embodiment, the length of the second reinforcement member 12 is 10m, and the diameter of the first reinforcement member 11 and the diameter of the second reinforcement member 12 can be 2.4~4m. In this embodiment, the diameter of the first reinforcement member 11 and the diameter of the second reinforcement member 12 are both 3m.

[0047] Example 4

[0048] This embodiment is a structure for connecting the interface between layers of a 3D printed specimen, referring to Figure 6 On the basis of Example 2, in this embodiment, the connection components 1 are arranged in two rows, and the two rows of connection components 1 are arranged horizontally along the stacking direction of the 3D printed specimen body 2, so as to further enhance the interlayer tensile strength and shear strength of the 3D printed specimen and improve the overall stability of the 3D printed specimen.

[0049] Example 5

[0050] This embodiment is a structure for connecting the interface between layers of a 3D printed specimen, referring to Figure 7 On the basis of Example 4, two rows of connection components 1 are arranged horizontally and longitudinally along the stacking direction of the 3D printed specimen body 2, which effectively disperses and bears stress from different directions, reduces stress concentration, and thus reduces the risk of structural damage due to stress concentration, making the 3D printed specimen more durable and reliable.

[0051] The implementation principle of the structure for connecting the interlayer interface of a 3D printed specimen of the utility model is as follows: during the 3D printing process, multiple rows of connection components 1 are vertically inserted into the multi-layer 3D printed specimen body 2 and twisted at a small angle, and the multiple rows of connection components 1 are staggered and distributed at the same time. At this time, the first reinforcement member 11 is mechanically engaged with the multi-layer 3D printed specimen body 2, and the multiple second reinforcement members 12 are mechanically engaged with the multi-layer 3D printed specimen body 2 in a one-to-one correspondence, so as to achieve a stable connection of the multi-layer 3D printed specimen body 2.

[0052] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A structure for connecting the interfaces between layers of a 3D printed specimen, characterized in that: The structure for connecting the interface between layers of a 3D printed specimen comprises a first reinforcing member (11) for connecting the 3D printed specimen, wherein the 3D printed specimen is formed by stacking at least two layers of 3D printed specimen bodies (2); The first reinforcement member (11) passes through at least two layers of the 3D printed specimen body (2) along the stacking direction of the 3D printed specimen body (2).

2. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 1, characterized in that: A plurality of second reinforcement members (12) are fixedly connected to the first reinforcement member (11); A plurality of second reinforcement members (12) are distributed axially along the first reinforcement member (11), two ends of the second reinforcement member (12) are respectively located on both sides of the first reinforcement member (11), and an angle exists between the axial direction of the second reinforcement member (12) and the axial direction of the first reinforcement member (11); The second reinforcement member (12) is placed in the 3D printed specimen body (2).

3. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 2, characterized in that: The plurality of second reinforcement members (12) are evenly distributed axially along the first reinforcement member (11).

4. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 3, characterized in that: The axial angle between the second reinforcement member (12) and the axial angle between the first reinforcement member (11) is 90°.

5. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 4, characterized in that: The distance between adjacent second reinforcement members (12) is h, and h is equal to half of the total height of two adjacent 3D printed specimen bodies (2) corresponding to the second reinforcement members (12).

6. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 3, characterized in that: The first reinforcing member (11) and the second reinforcing member (12) connected to the first reinforcing member (11) together form a connection assembly (1), and a plurality of rows of connection assemblies (1) are arranged horizontally along the stacking direction of the 3D printed specimen body (2).

7. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 6, characterized in that: A plurality of rows of connection components (1) are arranged in a horizontal longitudinal direction along the stacking direction of the 3D printed specimen body (2).

8. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 4, characterized in that: The number of layers of the 3D printed specimen is n, the height of the 3D printed specimen body (2) is D, and the width is L, the width L is the horizontal transverse direction along the stacking direction of the 3D printed specimen body (2), and the height D is the horizontal longitudinal direction along the stacking direction of the 3D printed specimen body (2); The length of the first reinforcement member (11) is (n-0.5)D, and the length of the second reinforcement member (12) is (10%-15%)L.

9. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 8, characterized in that: The diameter of the first reinforcement member (11) and the diameter of the second reinforcement member (12) are both (3% to 5%) L.

10. The structure for connecting the interfaces between layers of a 3D printed specimen according to claim 2, characterized in that: The first reinforcement member (11) and the second reinforcement member (12) are both provided with threads.

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