3D printing manufacturing method of curved surface template

Abstract

The invention provides a 3D printing manufacturing method of a curved surface template, and relates to the technical field of curved surface template manufacturing, and the 3D printing manufacturing method comprises the steps of template construction design, 3D film shell model establishment, segmentation area division, back rib arrangement, tongue-and-groove arrangement, template printing forming, surface treatment and assembly forming, template recovery and the like. The construction safety and the construction progress can be guaranteed, and the use amount of manpower and material resources is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of curved surface template production, and in particular to a 3D printing production method for a curved surface template. Background Art

[0002] In recent years, with the development of construction technology, in order to realize the design features of various shapes, it is inevitable to deepen the curve and curved surface shapes, which puts higher requirements on the deepening processing of traditional templates. If you encounter irregular wall panels, beams and columns, each section presents a different curvature. The traditional production template cannot guarantee the smoothness of the structural surface. The selection of the mold is directly related to the concrete molding effect.

[0003] In the past, mold deepening either used a patchwork method of replacing curves with straight ones, which could not guarantee the strength and deformation resistance of the mold; or used steel molds or aluminum alloy molds for reverse molding, which was costly and difficult to process. At the same time, the large and heavy metal molds were very difficult to locate and install on site, and there were also major safety hazards and low residual value for recycling. Summary of the invention

[0004] In view of the above-mentioned prior art, the present invention proposes a 3D printing production method for a curved template.

[0005] The present invention provides a 3D printing method for producing a curved surface template, comprising the following steps: S1. Design template structure: Design the internal space support shape of the curved template, calculate the force model, and optimize the internal structure of the curved template; S2. Establishing a 3D membrane shell model: Using BIM technology to establish a 3D data model of the curved surface template, and at the same time establishing a 3D membrane shell data model of the curved surface template; S3. Divide the segmented area: Divide the segmented printing area according to the stress analysis of the overall curved template support system to ensure that each divided block is within the printing size range of the 3D printer; S4. Setting back ribs: setting back ribs on the back of each printing block template; S5. Setting a tongue and groove: setting a tongue and groove that can be installed and removed on one side between two adjacent curved surface templates; S6, template printing and molding: 3D printing modeling is performed on the BIM model of each partition, and the modeling information is accurate to the layer thickness. The 3D printing model is transferred to the printer, and the printer is used to print layer by layer until the finished surface; S7, surface treatment and assembly: After printing, assemble along the tongue and groove to form an integral curved template, and reinforce it with wood and screws; S8, template recycling: After the concrete pouring is completed and the curved template is removed, the template is recycled into printing raw materials for recycling, and then processed by drawing the printing consumables and used as new printing consumables.

[0006] Preferably, in S1, the internal structure of the curved template is a spatial honeycomb structure, and a hollow inner rib structure is used in the middle of the side plane printing body.

[0007] Preferably, in S4, a small back rib is provided on the back of the casting surface of the curved template, and a circular hole is preset at the corresponding position of the matching mold as a screw eye for the screw to pass through for reinforcement.

[0008] Preferably, in S8, the printing consumables are thermoplastic polymers.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a 3D printing production method for curved surface templates, which can print out mold templates of any curved surface shape; and it can be operated by a lightweight 3D printer, and a complete set of large curved surface templates can be formed by segmented printing and assembly with the help of simple support and reinforcement, which is simple and convenient to operate; and after the concrete pouring is completed, the printing consumables can be processed and recycled on site, and the recycled residual value is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of the hollow inner rib structure in an embodiment of the present invention.

[0011] Figure 2 It is a schematic diagram of dividing segmented areas in an embodiment of the present invention.

[0012] Figure 3 It is a schematic diagram of setting the back ribs in an embodiment of the present invention.

[0013] Figure 4 It is a schematic diagram of setting the tongue and groove in an embodiment of the present invention. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0015] Example: Figure 1-Figure 4 As shown, a 3D printing method for producing a curved template includes the following steps: S1. Design template structure: Design the internal space support shape of the curved template, calculate the force model, and optimize the internal structure of the curved template. The internal structure of the curved template is a spatial honeycomb structure, and a hollow internal rib structure is used in the middle of the side plane print body to ensure that the curved template per unit area is made with the least and lightest material. At the same time, the thickness, strength and other parameters of the curved template are guaranteed to reduce the dead weight of the curved template and facilitate transportation and on-site manual construction and assembly.

[0016] S2. Establish 3D membrane shell model: Use BIM technology to establish a three-dimensional data model of the curved surface template, and at the same time establish a three-dimensional membrane shell data model of the curved surface template. The thickness of the membrane shell is equal to the thickness of the template plate. Perform a force analysis on the entire curved surface template, set the separation position of the curved surface template at a position with less shear force, and establish the various shapes and sizes.

[0017] S3. Divide the area into sections: Divide the printing area into sections according to the stress analysis of the overall curved template support system to ensure that each section is within the printing size range of the 3D printer.

[0018] S4. Set back ribs: A reliable back rib is set on the back of each printing block template to limit the deformation of the template. In order to ensure the rigidity of the template itself and reduce the problem of insufficient support caused by insufficient modulus of the back rib keel, a small back rib is set on the back of the casting surface of the curved template, and a circular hole is preset at the corresponding position of the matching mold as a screw eye for the screw to pass through for reinforcement.

[0019] S5. Setting tongue and groove: In order to reduce the misalignment between the partition panels, make the on-site assembly surface more precise, and ensure that each section of the wall panel can be perfectly spliced, a tongue and groove that can be installed and removed on one side is set between two adjacent curved templates.

[0020] Among them, although tongue and groove are set at the joints between each partition section, double-sided tape is still needed to seal the larger joints to ensure that no leakage occurs during the pouring process.

[0021] S6. Template printing: 3D printing modeling is performed on the BIM model of each partition. The modeling information is accurate to the layer thickness. The thickness of the layer printing is related to the flatness and accuracy required for concrete pouring. The 3D printed model is transferred to the printer, and the printer is used to print layer by layer until the finished surface.

[0022] In order to reduce the template error during printing, the printer needs to be set on a completely flat and stable base, and a shock-absorbing pad is set at the bottom. In order to achieve a perfect curve effect in each partition area, a temporary printing support is set during printing. After printing is completed, the temporary support is removed with a polishing device to ensure the flatness and cleanliness of the template surface.

[0023] S7, surface treatment and assembly: After printing is completed, the external support structure required for layered printing is removed, and the whole curved template is assembled along the tongue and groove, and reinforced with wood and screws. Use 3D scanning and measurement equipment to scan the pre-assembled large curved template, accurately collect data, and compare the dimensions in all directions with the original 3D model.

[0024] In order to reduce deformation during the pouring process, before the formal production of the formwork, a small concrete test mold is used as a comparative test, and the deviation of the demoulding test blocks under various sizes, thicknesses, concrete grades and pouring temperatures is compared to determine the template thickness and back rib form under the minimum deformation. A 150×150×150 test mold is made, and pouring and demoulding tests are carried out to test the deformation, demoulding effect, size, carbonization depth, etc. during the pouring process.

[0025] S8, template recycling: After the concrete pouring is completed and the curved template is removed, the template is recycled into printing raw materials using a heating spray gun, and then processed by drawing the printing consumables and used as new printing consumables.

[0026] The 3D printer in this embodiment is an FDM 3D printer, and the printing consumables are thermoplastic polymers. This type of plastic can be heated and repeatedly melted and solidified, so it has a high degree of plasticity and reusability. In terms of form, the thermoplastic plastics used are mainly filaments, such as PLA, ABS, TPU and PETG. If the project has special requirements, this type of printing consumables can also add PLA-based mixed consumables such as carbon fiber, wood powder, metal powder, etc.

[0027] In this embodiment, formwork reinforcement, concrete pouring, formwork removal, etc. are all conventional construction practices, so they will not be described in detail here.

[0028] In this embodiment, in order to reduce the problem of formwork floating during concrete pouring, the back ribs of the bottom layer of formwork can be reinforced by leaving holes for adding ground nails or fastening bolts.

[0029] The method of this embodiment uses 3D modeling and cutting to reduce the size of each mold, thereby reducing the error in the entire surface printing mold (3D printing will amplify the cumulative error over time). At the same time, the cut template is also lighter. The tongue and groove design ensures that there is no leakage at the template joints. The back rib design ensures that the template is less deformed during transportation, hoisting and pouring, which is convenient for hoisting at the construction site, effectively optimizes the construction progress, quality, safety and other issues, ensures construction safety and progress, and reduces the use of manpower and material resources. In addition, after the curved panel construction is completed, the material can be completely recycled to make new printing consumables.

[0030] The above are only implementation modes of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent schemes made using the contents of the present invention specification, directly or indirectly applied in other related technical fields, are also within the patent protection scope of the present invention.

Claims

1. A 3D printing method for producing a curved template, characterized in that: The steps include: S1. Design template structure: Design the internal space support shape of the curved template, calculate the force model, and optimize the internal structure of the curved template; S2. Establishing a 3D membrane shell model: Using BIM technology to establish a 3D data model of the curved surface template, and at the same time establishing a 3D membrane shell data model of the curved surface template; S3. Divide the segmented area: Divide the segmented printing area according to the stress analysis of the overall curved template support system to ensure that each divided block is within the printing size range of the 3D printer; S4. Setting back ribs: setting back ribs on the back of each printing block template; S5. Setting a tongue and groove: setting a tongue and groove that can be installed and removed on one side between two adjacent curved surface templates; S6, template printing and molding: 3D printing modeling is performed on the BIM model of each partition, and the modeling information is accurate to the layer thickness. The 3D printing model is transferred to the printer, and the printer is used to print layer by layer until the finished surface; S7, surface treatment and assembly: After printing, assemble along the tongue and groove to form an integral curved template, and reinforce it with wood and screws; S8, template recycling: After the concrete pouring is completed and the curved template is removed, the template is recycled into printing raw materials for recycling, and then processed by drawing the printing consumables and used as new printing consumables.

2. The 3D printing method for producing a curved template according to claim 1, characterized in that: In S1, the internal structure of the curved template is a spatial honeycomb structure, and a hollow inner rib structure is used in the middle of the side plane printing body.

3. The 3D printing method for producing a curved template according to claim 1 or 2, characterized in that: In S4, a small back rib is arranged on the back of the casting surface of the curved template, and a circular hole is preset at the corresponding position of the matching mold as a screw eye for the screw to pass through for reinforcement.

4. The 3D printing method for producing a curved template according to claim 1 or 2, characterized in that: In S8, the printing consumables are thermoplastic polymers.

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