CN119981254A - A special-shaped hole shell component reinforced by 3D printing connector and a manufacturing method thereof - Google Patents
A special-shaped hole shell component reinforced by 3D printing connector and a manufacturing method thereof Download PDFInfo
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- CN119981254A CN119981254A CN202510407919.0A CN202510407919A CN119981254A CN 119981254 A CN119981254 A CN 119981254A CN 202510407919 A CN202510407919 A CN 202510407919A CN 119981254 A CN119981254 A CN 119981254A
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Abstract
The invention discloses a special-shaped hole shell member reinforced by a 3D printing connecting piece and a manufacturing method thereof, belonging to the technical fields of building structure engineering and additive manufacturing. The member comprises an upper layer plate, a lower layer plate, a middle-opening-shaped 3D printing connecting piece and a filling material of a cavity between the two layers of plates, wherein when the member is manufactured, the upper layer plate, the lower layer plate and the middle-opening-shaped 3D printing connecting piece are assembled to form a double-layer structure with the cavity, and then the filling material is poured into the cavity to form the integral shell member with the variable thickness and the opening state. The 3D printing connecting piece plays a structural reinforcing role, can remarkably improve structural performances such as strength, rigidity and stability of the shell, can be custom designed and manufactured by 3D printing according to the thickness and the size requirements of specific positions, has better suitability for special-shaped shells, is free in shape, has light-transmitting or luminous holes, and has more abundant space effects and artistic expressive force.
Description
Technical Field
The invention relates to the technical fields of building structure engineering and additive manufacturing, in particular to a special-shaped hole shell member reinforced by a 3D printing connecting piece and a manufacturing method.
Background
The existing shell structure commonly has the following technical bottlenecks in engineering application, and severely restricts the popularization of the shell structure in complex building forms and functional demand scenes:
1. Limitations of mechanical Properties of traditional Shell
The inherent defect of single thickness design is that the conventional shell adopts an equal thickness design, and the local thickness cannot be optimized according to stress distribution, so that the material utilization rate is low. For example, in areas with higher bending moments, thin-walled structures tend to produce plastic hinges, while in areas with lower forces, thick-walled designs result in redundant mass.
The mechanical defect of the sandwich filling structure is that although the rigidity of the traditional sandwich shell (such as honeycomb core and foam filling) can be partially improved, the connection strength between the sandwich shell and the panel is insufficient, and the sandwich shell is easy to deglue or delaminate under the action of long-term load.
The structures of the two traditional shells are difficult to adapt to complex mechanical working conditions (such as uneven load and bending and twisting combined stress).
2. Difficulty in adapting to special-shaped shell
The geometric constraint of the traditional connecting piece is that the conventional connecting piece such as steel ribs, wooden supports and the like rely on die processing, and the suitability for free-form surfaces and variable-thickness shells is low.
The customization production efficiency is low, the connecting pieces are required to be customized piece by piece aiming at the complex curved surface, the production period is long, and the die loss rate is high.
3. Aesthetic and functional synergy problems
The functionality and the safety of the light-transmitting holes are contradicted, namely the light-transmitting holes of the traditional shell are mostly provided with later mechanical holes, the integrity of the panel is damaged, and the problem of local cracking easily occurs after the panel is put into use.
The conflict between the decorative requirement and the structural strength is that the traditional shell is difficult to realize complicated curved surface modeling, and in order to meet the pursuit of architects on artistic effects such as hollowed-out, gradual change and the like, the structural performance is always required to be sacrificed, and the unification of the mechanical performance and the aesthetic design is difficult to realize.
Therefore, the traditional shell structure has the problems of insufficient strength, poor special-shaped adaptability, low construction efficiency and the like under the complex working condition, and is difficult to meet the requirements of modern buildings on the shell structure, and the existing limitation is broken through by innovative structural forms and manufacturing processes.
Disclosure of Invention
The invention aims to provide a special-shaped hole shell member reinforced by a 3D printing connecting piece and a manufacturing method thereof, wherein the special-shaped hole shell member which has variable thickness, excellent mechanical property and quick assembly is manufactured through the synergistic effect of the customized design of the 3D printing connecting piece and a cavity filling material, the problems of insufficient strength, poor special-shaped adaptability, low construction efficiency and the like of a traditional shell structure under complex working conditions are solved, and artistic expression functions such as light transmission, gradual change form and the like are endowed to the shell.
In order to achieve the above object, the present invention provides a special-shaped hole shell member reinforced by a 3D printing connector, comprising an upper plate and a lower plate, wherein a 3D printing connector and a cavity filling layer are arranged between the upper plate and the lower plate;
Holes are formed in the upper-layer plate and the lower-layer plate, and nail holes are uniformly formed in the edges of the holes;
The 3D printing connecting piece is of a hollow closed structure, holes are formed in the upper end face and the lower end face, and the 3D printing connecting piece passes through the nail holes and the holes through bolts or rivets to be fixedly connected with the upper-layer plate and the lower-layer plate.
Preferably, the outer wall of the 3D printing connecting piece is provided with a protrusion for enhancing engagement with the cavity filling layer and effectively preventing the 3D printing connecting piece from being separated and slipped.
Preferably, the protrusions are cylindrical or conical.
Preferably, the upper plate and the lower plate are aluminum alloy plates or steel plates.
Preferably, the hole is polygonal, circular or free curve.
The invention also provides a manufacturing method of the special-shaped hole shell member reinforced by the 3D printing connecting piece, which comprises the following steps:
S1, generating three-dimensional data according to a design model, and printing a 3D printing connecting piece;
S2, connecting the upper layer plate, the lower layer plate and the 3D printing connecting piece through bolts or rivets to form a cavity structure;
s3, filling a filling material into the cavity, and curing to form a cavity filling layer.
Preferably, in the S1, the 3D printing connector is formed by 3D printing of plastic or metal materials, so that the structural performance of the housing can be enhanced.
Preferably, in the step S3, the filler is a concrete or a resin material.
Therefore, the special-shaped hole shell member reinforced by the 3D printing connecting piece and the manufacturing method provided by the invention have the following beneficial effects:
(1) The 3D printing connector serves as an internal reinforcing rib, and is cooperated with the cavity filling layer to resist shearing force, so that the integral rigidity of the shell is obviously improved, and the 3D printing connector can be used as a plane stress member, a vertical stress member and a space stress member;
(2) The construction without the template is that the upper layer plate and the lower layer plate can be used as pouring templates, so that the traditional template materials are saved;
(3) The art and the functions are combined, the 3D connecting piece is of a hollow light-transmitting design (such as transparent resin material and hole array), so that a dynamic light and shadow effect can be realized, and the aesthetic requirement of a building can be met;
(4) The 3D printing connector has better suitability for the special-shaped shell, can be customized and designed and manufactured by 3D printing according to the thickness and the size of the specific position of the shell, and has better suitability and stronger space adaptability for the special-shaped shell;
(5) The 3D printing connecting piece can be adapted to any special-shaped hole, the upper layer of plate and the lower layer of plate can be connected with the 3D printing connecting piece through bolts or rivets, the assembly is quick and simple, and the design to the installation period is shortened.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a cross-sectional view of a variable thickness housing of the present invention;
FIG. 2 is an exploded view of the housing member of the present invention;
reference numerals illustrate:
1. The plate comprises an upper plate, a lower plate, a 3D printing connecting piece, a cavity filling layer, a 5, a hole, a 6, a nail hole, a 7, a hole, an 8, a rivet, a 9 and a protrusion.
Detailed Description
The technical scheme of the application is further described below through the attached drawings and the embodiments. It should be understood that these embodiments are merely illustrative of the present application and not intended to limit the scope of the present application, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the application are intended to be equivalent substitutes are included in the scope of the present application. It is also to be understood that various changes and modifications may be made by those skilled in the art after reading the disclosure herein, and that such equivalents are intended to fall within the scope of the application as defined by the appended claims.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment may be combined in any manner to form a corresponding implementable technical solution.
Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application pertains, and the use of related terms herein is intended only to describe specific embodiments, not to limit the present application.
Unless otherwise indicated herein, reagents, instruments, equipment, and the like used in the present invention are those conventionally used by those skilled in the art.
The materials of the following examples were selected:
The upper layer plate and the lower layer plate are made of aluminum alloy plates with the thickness of 1.5mm, and the tensile strength is more than or equal to 300MPa;
The 3D printing connector is made of transparent PC plastic (the light transmittance is more than or equal to 85 percent), the height gradient changes (50 mm-120 mm), and the height of the conical protrusion on the outer wall is 8mm;
Filling material, C40 light weight concrete (density 1800kg/m 3).
Example 1
The present embodiment provides a curved roof housing member reinforced with 3D printed connectors, as shown in fig. 1, which is a cross-sectional view of a variable thickness housing of the present embodiment, illustrating the relationship between upper and lower sheets and 3D printed connectors and the filler layer and the thickness variation of the housing, and as shown in fig. 2, which is an exploded view of a housing member of the present embodiment, illustrating the assembled relationship between upper and lower sheets and 3D printed connectors. Specifically, the curved roof shell member comprises an upper layer plate 1 and a lower layer plate 2, and a 3D printing connecting piece 3 and a cavity filling layer 4 are arranged between the upper layer plate 1 and the lower layer plate 2.
Circular holes 5 are formed in the upper plate 1 and the lower plate 2, nail holes 6 are uniformly formed in the edges of the holes 5, the 3D printing connecting piece 3 is of a hollow annular wall closed structure, holes 7 are formed in the upper end face and the lower end face, and the 3D printing connecting piece 3 is fixedly connected with the upper plate 1 and the lower plate 2 through bolts or rivets 8 penetrating through the nail holes 6 and the holes 7. The outer wall of the 3D printing connecting piece 3 is provided with a cylindrical protrusion 9 for enhancing engagement with the cavity filling layer 4 and effectively preventing the detachment and sliding of the cylindrical protrusion.
Example 2
The embodiment provides a manufacturing method of the curved roof shell member reinforced by the 3D printing connecting piece, which specifically comprises the following steps:
Step 1, generating three-dimensional data of a connecting piece according to a roof curved surface model, ensuring that the outer contour of the connecting piece is matched with the edges of holes of an upper layer of plates and a lower layer of plates, and optimizing the distribution density of the connecting piece through finite element analysis;
Step 2, printing the 3D printing connecting piece by adopting an FDM process, wherein the thickness of a printing layer is 0.2mm, and the filling rate is 80%;
step 3, connecting the 3D printing connecting piece with the pre-perforated upper plate and the lower plate by stainless steel rivets, wherein the maximum thickness of the cavity is 120mm (central bearing area) and the minimum thickness of the cavity is 50mm (edge area);
And 4, pumping concrete into the cavity from the bottom grouting holes, pouring the concrete into each layer, compacting the inserted vibrator, and curing for 7 days to form a cavity filling layer.
And (3) effect verification:
And (3) testing the ultimate bearing capacity, namely, when the uniform load reaches 15kN/m 2, buckling failure does not occur (compared with the structure without connecting piece, the structure is lifted by 45%).
The LED lamp strip is arranged at night, so that perforation illumination is realized.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted by the same, and the modified or substituted technical solution may not deviate from the spirit and scope of the technical solution of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510407919.0A CN119981254B (en) | 2025-04-02 | 2025-04-02 | A special-shaped hole shell component reinforced with 3D printed connectors and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510407919.0A CN119981254B (en) | 2025-04-02 | 2025-04-02 | A special-shaped hole shell component reinforced with 3D printed connectors and its manufacturing method |
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| Publication Number | Publication Date |
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| CN119981254A true CN119981254A (en) | 2025-05-13 |
| CN119981254B CN119981254B (en) | 2025-10-21 |
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| CN202510407919.0A Active CN119981254B (en) | 2025-04-02 | 2025-04-02 | A special-shaped hole shell component reinforced with 3D printed connectors and its manufacturing method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8301971A (en) * | 1983-06-02 | 1985-01-02 | Schelfhorst Hendrik W | Double walled inflatable building - has inner and outer foil shells and cavity filled with setting material |
| CA1220011A (en) * | 1985-10-22 | 1987-04-07 | James T. Van Dame | Energy efficient skylight structure |
| CN2672191Y (en) * | 2003-12-17 | 2005-01-19 | 刘健群 | Roof large plate member of ventilation, heat insulation and uniform lighting |
| CN205117116U (en) * | 2015-09-06 | 2016-03-30 | 长沙星纳气凝胶有限公司 | Insulation glass |
| CN105756187A (en) * | 2016-03-22 | 2016-07-13 | 华南理工大学 | 3d printing process and concrete combined building structure and construction method |
| CN107559768A (en) * | 2017-09-26 | 2018-01-09 | 深圳市科冷商用设备有限公司 | A kind of pneumatic membrane building with assemblies |
| WO2020048468A1 (en) * | 2018-09-06 | 2020-03-12 | 浙江大学 | Construction method for 3d printed integrated-weaving molding building |
| KR20230099378A (en) * | 2021-12-27 | 2023-07-04 | 현대건설(주) | Formwork including 3D-printed atypical formwork parts for small structures and manufacturing method thereof |
-
2025
- 2025-04-02 CN CN202510407919.0A patent/CN119981254B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8301971A (en) * | 1983-06-02 | 1985-01-02 | Schelfhorst Hendrik W | Double walled inflatable building - has inner and outer foil shells and cavity filled with setting material |
| CA1220011A (en) * | 1985-10-22 | 1987-04-07 | James T. Van Dame | Energy efficient skylight structure |
| CN2672191Y (en) * | 2003-12-17 | 2005-01-19 | 刘健群 | Roof large plate member of ventilation, heat insulation and uniform lighting |
| CN205117116U (en) * | 2015-09-06 | 2016-03-30 | 长沙星纳气凝胶有限公司 | Insulation glass |
| CN105756187A (en) * | 2016-03-22 | 2016-07-13 | 华南理工大学 | 3d printing process and concrete combined building structure and construction method |
| CN107559768A (en) * | 2017-09-26 | 2018-01-09 | 深圳市科冷商用设备有限公司 | A kind of pneumatic membrane building with assemblies |
| WO2020048468A1 (en) * | 2018-09-06 | 2020-03-12 | 浙江大学 | Construction method for 3d printed integrated-weaving molding building |
| KR20230099378A (en) * | 2021-12-27 | 2023-07-04 | 현대건설(주) | Formwork including 3D-printed atypical formwork parts for small structures and manufacturing method thereof |
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| CN119981254B (en) | 2025-10-21 |
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