Lattice concrete 3D printing method and application for large component forming

Abstract

The present invention relates to a dot matrix concrete 3D printing method and application for large-scale component molding, which includes obtaining three-dimensional data of the component to be printed, establishing its three-dimensional model, obtaining the configuration of the print head, and setting printing parameters; obtaining the printing parameters, and generating dot matrix information of the corresponding three-dimensional model based on the characteristics of the component to be printed with an improved slicing algorithm; controlling the print head to perform 3D printing according to the dot matrix information; post-processing the printed component to obtain a finished component; and the method is applied to 3D printing of concrete structures. The present invention processes the three-dimensional model layer by layer into a dot matrix by optimizing the slicing algorithm, and each dot is a printing extrusion point where the print head pauses, so that the printing height of a single dot is significantly improved; there are no restrictions on the print head size, printing speed, and continuous printing, and the single-layer height and printing speed are significantly improved; considering the yield stress and thixotropy of the printed concrete material, the self-supporting and stability of the printed material are ensured; and it adapts to diversified printing needs.

Description

Technical Field

[0001] The present invention relates to the technical field of processing cement, clay or stone, and in particular to a lattice concrete 3D printing method and application for forming large components. Background Art

[0002] Concrete is one of the most important civil engineering materials in contemporary times. It has the advantages of abundant raw materials, low price, simple production process, high compressive strength, good durability, and a wide range of strength grades. This makes concrete not only used in various civil engineering projects, but also used in a large number of other related industries to support the rapid development of society. Concrete is also a high-energy consumption and high-pollution material. In order to give full play to its advantages and reduce its negative impact, 3D printing concrete technology based on 3D printing has become the focus of people's attention.

[0003] Concrete 3D printing technology is an interdisciplinary technology that integrates computer graphics, mechanical parts design and production, assembly technology, automated control, precision numerical control, concrete materials, fluid mechanics and other disciplines. It has the advantages of high efficiency, no template required, labor saving, material saving, low carbon and environmental protection. It is not only suitable for the design and construction of traditional house shapes, but also can realize the construction of various beautiful irregular curved shapes.

[0004] Discussions on 3D printed concrete have been disclosed in the prior art. A Chinese patent with publication number CN118305866A discloses a multi-line 3D printed concrete structure and a construction method thereof, wherein the method prepares a concrete printing material; designs a 3D printing model according to the shape of the concrete structure to be printed, wherein the designed 3D printing model includes an outer contour line and an internal structure line closely attached to the outer contour line; and uses a 3D printing device to sequentially print the outer contour line and the internal structure line according to the designed 3D printing model, thereby forming a multi-line 3D printed concrete structure. This application discusses a 3D printed concrete structure with at least two layers of lines, wherein the outer contour line serves as the outer contour of the structure, and the internal structure line serves as the internal support of the outer contour line. In practical applications, this is a 3D printing mode, but it has certain requirements for the size of the print head, otherwise the contour is more likely to fall or tilt during the printing of a single contour, thereby causing the overall model to be out of shape. At the same time, this printing method has high requirements for printing speed and continuous printing, and the construction requirements for the processing site will also be high. Summary of the invention

[0005] The present invention solves the problems existing in the prior art and provides a dot matrix concrete 3D printing method and application for large component forming. By optimizing the slicing algorithm, the component to be printed is processed layer by layer into a dot matrix, and each dot is a working point where the print head pauses, thereby achieving a significant increase in the printing height of a single dot.

[0006] The technical solution adopted by the present invention is a lattice concrete 3D printing method for forming large components, the method comprising the following steps:

[0007] S1 obtains the three-dimensional data of the component to be printed and establishes its three-dimensional model;

[0008] S2 obtains the print head configuration and sets the printing parameters;

[0009] S3 obtains printing parameters and generates dot information of the corresponding three-dimensional model by using an improved slicing algorithm based on the features of the component to be printed;

[0010] S4 controls the print head and performs 3D printing according to the dot matrix information;

[0011] S5 performs post-processing on the printed component to obtain a finished component.

[0012] Preferably, in S1, the three-dimensional data includes a coordinate set of all points and lines of the component to be printed in the 3D space.

[0013] Preferably, in S3, generating the lattice information of the corresponding three-dimensional model by using the improved slicing algorithm comprises the following steps:

[0014] S3.1 Obtaining the slump of the printed concrete material;

[0015] S3.2 Based on the slump of the printed concrete material, obtain the minimum circumscribed circle and height h of the unit extrusion amount of the printed concrete material on the horizontal plane within a preset time; initialize j=1;

[0016] S3.3 Initialize i=1, N j =0;

[0017] S3.4 Based on the minimum circumscribed circle and the height, take the i-th layer contour of the j-th sub-component to be printed of the component to be printed from bottom to top, arrange points on the contour and inside the contour with the minimum circumscribed circle tangent to generate a first point arrangement diagram, and the outermost circle points of the first point arrangement diagram are connected to form the bottom contour;

[0018] S3.5 calculating, based on the first layout diagram and the current layer height, an extrusion amount of the supplementary printing concrete material at other positions except the current layer contour, so that the extrusion sites of the supplementary printing concrete material are the second layout diagram;

[0019] S3.6 Calculate the corrected height after adding the printed concrete material to obtain the slice height h of the i-th layer i ;

[0020] S3.7 Calculate the total height H of all slices of the subcomponent to be printed temp, if H temp is smaller than the height H of the subcomponent to be printed and (HH temp ) / h>α, then add 1 to i and return to S3.4, otherwise, proceed to the next step; α∈(1,1.5];

[0021] S3.8 Obtaining HH temp The value of is used as the height limit, the extrusion amount of the printed concrete material is calculated based on the slump of the printed concrete material, the temporary minimum circumscribed circle corresponding to this time is obtained, and the third distribution diagram is obtained based on the temporary minimum circumscribed circle; i is added by 1, and N at this time is j +i value is assigned to N j , proceed to the next step;

[0022] S3.9 If there are still unsliced ​​sub-components to be printed, j is increased by 1 and the process returns to S3.3, otherwise proceed to the next step;

[0023] S3.10 constructing a dot matrix information set of N layers of the component to be printed, , where J is the total number of subcomponents to be printed.

[0024] Preferably, in S3, the characteristics of the component to be printed include whether the component to be printed is hollow;

[0025] When the component to be printed is hollow, the subcomponent to be printed has an independent hollow space, and a partition is arranged between several subcomponents to be printed;

[0026] When the component to be printed is not hollow, the component to be printed is divided into a plurality of sub-components to be printed based on the visible horizontal plane of the component to be printed on the horizontal projection plane.

[0027] Preferably, corresponding to the partition or the non-hollow sub-component to be printed, concrete material is filled between the lattices corresponding to each layer, and the layer height after the concrete material is filled is controlled to meet the design height of the current layer.

[0028] Preferably, the dot matrix information set includes the coordinates of the dot matrix and the output of the printed concrete material of the corresponding dot matrix.

[0029] Preferably, corresponding to any layer of any sub-component to be printed, a plurality of print heads are used to simultaneously complete the printing of the first dot layout pattern, the second dot layout pattern, or the third dot layout pattern.

[0030] Preferably, when the distance between the multiple print heads is greater than a preset value when printing on the first layout pattern, the second layout pattern or the third layout pattern, a steel mesh is arranged between the output points of any two print heads.

[0031] Preferably, in S4, the component to be printed is printed at a preset station, and after each layer of printing is completed, a top view image of the current layer is obtained, and the cutting line is positioned and calibrated;

[0032] In S5, post-processing includes leveling and maintaining the printed component based on the cutting line.

[0033] An application of the dot matrix concrete 3D printing method for large-scale component molding is applied to 3D printing molding of concrete structures.

[0034] The present invention relates to a dot matrix concrete 3D printing method and application for large-scale component molding, which comprises the following steps: obtaining three-dimensional data of a component to be printed, establishing a three-dimensional model thereof, obtaining a print head configuration, and setting printing parameters; obtaining the printing parameters, and generating dot matrix information of a corresponding three-dimensional model by an improved slicing algorithm based on the characteristics of the component to be printed; controlling the print head to perform 3D printing according to the dot matrix information; post-processing the printed component to obtain a finished component; and the method is applied to 3D printing of concrete structures.

[0035] The beneficial effects of the present invention are that, by optimizing the slicing algorithm, the three-dimensional model is processed layer by layer into a dot matrix, and each dot is a printing extrusion point where the print head pauses, thereby significantly improving the printing height of a single dot; there is no restriction on the print head size, printing speed and continuous printing, and the single-layer height and printing speed are significantly improved; the yield stress and thixotropy of the printed concrete material are taken into consideration to ensure the self-support and stability of the printed material; and it can adapt to diverse printing needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a flow chart of the method of the present invention;

[0037] Figure 2 A schematic diagram of slicing a component to be printed and generating dot matrix information in the present invention;

[0038] Figure 3 is a flow chart of S3 in the present invention;

[0039] Figure 4 A schematic diagram of dividing a component to be printed into subcomponents to be printed in the present invention;

[0040] Figure 5 It is a schematic diagram of the point distribution in the present invention, wherein the dotted line is the current outline, the large circle corresponds to the dot matrix of the first point distribution diagram, and the small circle on the left is the point (matrix) corresponding to the second point distribution diagram. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with embodiments, but the protection scope of the present invention is not limited thereto.

[0042] like Figure 1 As shown, the present invention relates to a lattice concrete 3D printing method for large-scale component forming, the method comprising the following steps:

[0043] S1 obtains the three-dimensional data of the component to be printed and establishes its three-dimensional model;

[0044] S2 obtains the print head configuration and sets the printing parameters;

[0045] S3 obtains printing parameters and generates dot information of the corresponding three-dimensional model by using an improved slicing algorithm based on the features of the component to be printed;

[0046] S4 controls the print head and performs 3D printing according to the dot matrix information;

[0047] S5 performs post-processing on the printed component to obtain a finished component.

[0048] In the present invention, a component to be printed is defined, and its three-dimensional model information is established. The three-dimensional model here refers to placing it in a preset three-dimensional coordinate system, and each point of the component to be printed can be located by the three-dimensional coordinates; then, based on the objectively settable print head parameters and the corresponding data of the printed concrete material, the three-dimensional model is layered and sliced ​​with an improved slicing algorithm, and then the dot matrix information of the printed output as "dots" is obtained, and each layer of the component to be printed is covered with the dot matrix, that is, the three-dimensional model is sliced ​​layer by layer into a dot matrix composed of space points at a certain interval; the construction in the Z-axis direction is completed by superposition, and the print head is called based on the dot matrix information to print;

[0049] Specifically, each dot of the dot matrix corresponds to the concrete extrusion position of the print head. The printer identifies the 3D printing dots and determines the printing parameters of each dot, including dot spacing, printing height, material extrusion amount and moving speed, to adapt to the yield stress and thixotropy of the material. The print head of the concrete 3D printer moves along the generated dot matrix line and extrude and print concrete materials, stacking them layer by layer into components / structures. The printing height of each dot is generally several times that of traditional line slices. When the extrusion height of the print head reaches the designed height, it stops extruding and moves to the next dot to continue printing and extruding until all the dot matrix layers are printed, and then it moves to the next slice layer above the current layer to continue printing.

[0050] Finally, the printed components are post-processed according to the conventional concrete post-processing method.

[0051] Each step is further explained below.

[0052] (1) Obtaining the 3D data of the component to be printed and establishing its 3D model;

[0053] The three-dimensional data includes a coordinate set of all points and lines of the component to be printed in the 3D space.

[0054] In the present invention, considering the effectiveness of printing and the convenience of setting the dot matrix, the intersection of multiple lines is taken as the point, the information of the lines between the points is obtained, and a coordinate set is constructed, wherein the lines include straight lines and curves, that is, corresponding to planes and curved surfaces.

[0055] (2) Get the print head configuration and set the printing parameters

[0056] In the present invention, the printing parameters include the density (spacing) of printing dots and the layer height, and of course also include the basic properties of the printed concrete material, to ensure that it can be used with a higher single-dot height; the print head configuration generally refers to a single print head operation or multiple print heads running in parallel, the former is used to print thinner contour surfaces, while the latter is used to print thicker contour surfaces, components to be printed with more dots or hollow walls, etc., and has a wider range of applications.

[0057] (3) obtaining printing parameters and generating dot information of the corresponding three-dimensional model using an improved slicing algorithm based on the characteristics of the component to be printed;

[0058] In the present invention, Figure 2 As shown in (a), the component to be printed is shown. Taking its outline as an example, the following Figure 2 As shown in (b), it is dotted, and the same is true for each layer of contour, and finally a three-dimensional model composed of dot matrix is ​​formed; Figure 2 As shown in (c), it is the working position of the print head corresponding to the dot matrix. After the extrusion of the printed concrete material is completed, the corresponding effect is as follows Figure 2 As shown in (d).

[0059] Specifically, if Figure 3 As shown, the step (3) of generating the dot information of the corresponding three-dimensional model by using the improved slicing algorithm includes the following steps:

[0060] (3-1) Obtaining the slump of printed concrete material;

[0061] When the printed concrete material is dot-matrix printed, the printing height of each dot is generally several times the width of the print head extrusion port, and the printing height of a single layer of each dot in the Z-axis direction depends on the yield stress and thixotropy of the concrete or mortar, ensuring the self-support and stability of the printed structure. In order to obtain better printing effects, the amount of printed concrete material extruded by the print head is generally very small, so that it can be better shaped.

[0062] In the present invention, the printed concrete material has more or less slump, which will be taken into account in the layering process. The slump will cause the extruded printed concrete material to have a certain degree of height change. Since the extruded printed concrete material is generally in the shape of a round cake, after filling the gap between adjacent round cake-shaped printed concrete materials, due to the action of force, a certain degree of height fluctuation will occur until it stabilizes, which needs to be taken into account in the layering process.

[0063] (3-2) Based on the slump of the printed concrete material, the minimum circumscribed circle and height h of the unit extrusion amount of the printed concrete material on the horizontal plane within a preset time are obtained; j=1 is initialized; the outer diameter and height h of the minimum circumscribed circle here are used as the guidance of the first layout diagram, that is, the state of the extruded printed concrete material without interference; j is used to correspond to the jth sub-component to be printed that is divided;

[0064] Here, the sub-component to be printed is associated with the features of the component to be printed, and the features of the component to be printed include whether the component to be printed is hollow;

[0065] When the component to be printed is hollow, it is mainly reflected in houses or building parts. In this case, the sub-component to be printed has an independent hollow space, and when the house or building part involves a multi-layer structure, interlayers are set between several sub-components to be printed, that is, the sub-component to be printed and the interlayers that may exist between more than two sub-components to be printed constitute the entire component to be printed;

[0066] When the component to be printed is not hollow, it is mainly reflected in solid concrete products, such as precast beams, concrete steps, etc. Based on the visible horizontal plane of this type of component to be printed on the horizontal projection plane, it is divided into blocks according to the horizontal plane (if any), and the component to be printed can be divided into several sub-components to be printed, that is, after placing the largest horizontal plane on the work station, the parts with obviously inconsistent edges are divided into sub-components to be printed, until the segmentation is completed. After each sub-component to be printed is matched with the corresponding three-dimensional model data, the three-dimensional information of each point can be obtained.

[0067] like Figure 4 As shown in (a), the component to be printed is a step structure. Figure 4 (b) shows the visible horizontal plane on the horizontal projection plane, as shown in Figure 4 As shown in (c), it is the top surface of each sub-component to be printed corresponding to the three-layer steps.

[0068] (3-3) Initialize i=1, N j = 0; i here corresponds to the i-th layer of each subcomponent to be printed, N j The count of the number of layers corresponding to the i-th component;

[0069] (3-4) Based on the minimum circumscribed circle and the height, the i-th layer contour of the j-th sub-component to be printed of the component to be printed is taken from bottom to top, and points are arranged on the contour and inside the contour with the minimum circumscribed circle being tangent to generate a first point arrangement diagram, wherein the outermost circle points of the first point arrangement diagram are connected to form the bottom contour; Figure 5 As shown by the large circle in;

[0070] The layering process starts from the bottom layer of each sub-component to be printed. First, the bottom surface is dotted. In this dot distribution process, the circular cake-shaped printed concrete material after collapse is used as the distribution reference. Since the edge position of each layer is certain and the outer diameter of the printed concrete material is certain, the printed concrete material can be directly arranged at the edge of each layer in a tangent manner to the circumference of the printed concrete material to obtain the first dot distribution diagram. Here, the center of each printed concrete material is located at the edge. The printed concrete material outside the edge contour can be directly cut and processed in the later stage. Since the extrusion amount of the printed concrete material is small, the amount of printed concrete material that needs to be cut is actually not large.

[0071] Obviously, when there is no need to split the sub-components to be printed, the number of sub-components to be printed is 1.

[0072] (3-5) based on the first layout diagram and the current layer height, calculating the extrusion amount of the additional printing concrete material at other positions except the current layer contour, so that the extrusion positions of the additional printing concrete material are the second layout diagram;

[0073] (3-6) Calculate the corrected height after adding printed concrete material to obtain the slice height h of the i-th layer i ;

[0074] On the basis of obtaining the first point layout, it may be necessary to fill the spaces between the points with printing concrete material, and the filled positions constitute the second point layout, such as Figure 5 As shown in the small circle, based on the space margin of each point, the extrusion amount of the printed concrete material is calculated on the basis of meeting the same layer height;

[0075] At the same time, after completing the printing of the second layout, due to the interaction of the printed concrete materials between the points and considering the actual properties of the printed concrete materials, the actual height of the current layer will fluctuate to a certain extent, so the actual slice height h is obtained. i ;

[0076] (3-7) Calculate the total height H of all slices of the subcomponent to be printed temp , if H temp is smaller than the height H of the subcomponent to be printed and (HH temp ) / h>α, then add 1 to i and return to (3-4), otherwise, proceed to the next step; α∈(1,1.5];

[0077] If and only if the total height of all slices of the sub-component to be printed has not reached the planned height H and is still large enough to split a layer, continue splitting, where α is related to the slump of the printed concrete material;

[0078] (3-8) Get HH temp The value of is used as the height limit, the extrusion amount of the printed concrete material is calculated based on the slump of the printed concrete material, the temporary minimum circumscribed circle corresponding to this time is obtained, and the third distribution diagram is obtained based on the temporary minimum circumscribed circle; i is added by 1, and N at this time is j +i value is assigned to N j , proceed to the next step;

[0079] When the total height of all slices of the sub-component to be printed has not reached the planned height H but can only be divided into one layer, it is necessary to adjust the model height at this moment, that is, on the basis of the height limit, the spacing of the points is reduced by reducing the extrusion amount of the printed concrete material to obtain a third point layout with denser points and smaller extrusion height;

[0080] After completion, record the obtained N j value;

[0081] (3-9) If there are still unsliced ​​sub-components to be printed, j is increased by 1 and the process returns to (3-3), otherwise proceed to the next step;

[0082] (3-10) constructing a dot matrix information set of N layers of the component to be printed, , where J is the total number of subcomponents to be printed.

[0083] Here N refers to all N j The dot information corresponding to each layer includes the first dot layout diagram and the second dot layout diagram or the third dot layout diagram, and the corresponding output of the printed concrete material.

[0084] The dot matrix information set includes the coordinates of the dot matrix and the output of the printed concrete material of the corresponding dot matrix.

[0085] Corresponding to the partitions or non-hollow sub-components to be printed, concrete material is filled between the dot matrixes corresponding to each layer, and the layer height after the concrete material is filled is controlled to meet the design height of the current layer.

[0086] In the present invention, for the solid layer, including but not limited to the interlayer between multiple hollow sub-components to be printed and the non-hollow sub-components to be printed, it is only necessary to fill the current layer with concrete material after printing its outer side surface. At the same time, this also facilitates the control of the height of the current layer to make it meet the design height.

[0087] During the implementation of the present invention, one or more print heads may be configured for the dot matrix information of any layer;

[0088] When multiple print heads are configured, corresponding to any layer of any sub-component to be printed, the first dot layout pattern, the second dot layout pattern, or the third dot layout pattern is printed simultaneously by multiple print heads.

[0089] When the distance between the multiple print heads is greater than a preset value when printing on the first layout diagram, the second layout diagram, or the third layout diagram, a steel mesh is set between the output points of any two print heads.

[0090] That is, the present invention supports dual-point printing technology, especially for printing surfaces with larger thickness, using two side-by-side print heads to perform extrusion operations synchronously to improve printing efficiency; at this time, the materials extruded by the two rows of printing points can be in contact and connected with each other, and in fact a certain distance can be retained to form a cavity wall structure, and in this process, in order to enhance the structural performance, a certain amount of tie steel mesh can be arranged therein, and this arrangement can be achieved by machine or manually.

[0091] (4) Control the print head and perform 3D printing according to the dot matrix information;

[0092] Print the components to be printed at the preset station. After each layer of printing is completed, obtain the top view image of the current layer, locate and calibrate the cutting line;

[0093] In the present invention, the dot matrix printing head adopts a screw extrusion type, which can evenly stack mortar or concrete building materials with good thixotropy and support.

[0094] In the present invention, considering that no matter how small the outer diameter of the circular cake-shaped printed concrete material is after the extruded printed concrete material, there may be some overflow, so it is necessary to locate and calibrate the cutting line after each layer of printing is completed, on the one hand to achieve position calibration and ensure that no offset occurs, and on the other hand to facilitate subsequent cutting processing.

[0095] (5) performing post-processing on the printed component to obtain a finished component;

[0096] In S5, post-processing includes leveling and maintaining the printed component based on the cutting line.

[0097] In the present invention, the leveling operation includes but is not limited to post-processing measures such as grinding leveling, plastering leveling or puttying leveling.

[0098] The present invention also relates to an application of the lattice concrete 3D printing method for large-scale component forming, which is applied to 3D printing forming of concrete structures.

[0099] In the present invention, the 3D printing of concrete structures herein includes but is not limited to 3D printing rapid prototyping of house construction, concrete components, and concrete structures in geotechnical engineering.

[0100] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lattice concrete 3D printing method for large-scale component molding, characterized in that: The method comprises the following steps: S1: Acquire the three-dimensional data of the component to be printed and establish its three-dimensional model; the three-dimensional data includes the coordinate set of all points and lines of the component to be printed in the 3D space; S2 obtains the print head configuration and sets the printing parameters; S3 obtains printing parameters and generates dot information of the corresponding three-dimensional model using an improved slicing algorithm based on the features of the component to be printed, including the following steps: S3.1 Obtaining the slump of the printed concrete material; S3.2 Based on the slump of the printed concrete material, obtain the minimum circumscribed circle and height h of the unit extrusion amount of the printed concrete material on the horizontal plane within a preset time; initialize j=1; S3.3 Initialize i=1, N j =0; S3.4 Based on the minimum circumscribed circle and the height, take the i-th layer contour of the j-th sub-component to be printed of the component to be printed from bottom to top, arrange points on the contour and inside the contour with the minimum circumscribed circle tangent to generate a first point arrangement diagram, and the outermost circle points of the first point arrangement diagram are connected to form the bottom contour; S3.5 calculating, based on the first layout diagram and the current layer height, an extrusion amount of the supplementary printing concrete material at other positions except the current layer contour, so that the extrusion sites of the supplementary printing concrete material are the second layout diagram; S3.6 Calculate the corrected height after adding the printed concrete material to obtain the slice height h of the i-th layer i ; S3.7 Calculate the total height H of all slices of the subcomponent to be printed temp , if H temp is smaller than the height H of the subcomponent to be printed and (HH temp ) / h>α, then add 1 to i and return to S3.4, otherwise, proceed to the next step; α∈(1,1.5]; S3.8 Obtaining HH temp The value of is used as the height limit, the extrusion amount of the printed concrete material is calculated based on the slump of the printed concrete material, the temporary minimum circumscribed circle corresponding to this time is obtained, and the third distribution diagram is obtained based on the temporary minimum circumscribed circle; i is added by 1, and N at this time is j +i value is assigned to N j , proceed to the next step; S3.9 If there are still unsliced ​​sub-components to be printed, j is increased by 1 and the process returns to S3.3, otherwise proceed to the next step; S3.10 constructing a dot matrix information set of N layers of the component to be printed, , where J is the total number of subcomponents to be printed; S4 controls the print head and performs 3D printing according to the dot matrix information; S5 performs post-processing on the printed component to obtain a finished component.

2. A lattice concrete 3D printing method for large-scale component molding according to claim 1, characterized in that: In S3, the characteristics of the component to be printed include whether the component to be printed is hollow; When the component to be printed is hollow, the subcomponent to be printed has an independent hollow space, and a partition is arranged between several subcomponents to be printed; When the component to be printed is not hollow, the component to be printed is divided into a plurality of sub-components to be printed based on the visible horizontal plane of the component to be printed on the horizontal projection plane.

3. A lattice concrete 3D printing method for large component molding according to claim 2, characterized in that: Corresponding to the partitions or non-hollow sub-components to be printed, concrete material is filled between the dot matrixes corresponding to each layer, and the layer height after the concrete material is filled is controlled to meet the design height of the current layer.

4. A lattice concrete 3D printing method for large-scale component molding according to claim 1, characterized in that: The dot matrix information set includes the coordinates of the dot matrix and the output of the printed concrete material of the corresponding dot matrix.

5. A lattice concrete 3D printing method for large-scale component molding according to claim 1, characterized in that: Corresponding to any layer of any sub-component to be printed, a plurality of print heads are used to simultaneously complete the printing of the first dot layout pattern, the second dot layout pattern, or the third dot layout pattern.

6. A lattice concrete 3D printing method for large-scale component molding according to claim 5, characterized in that: When the distance between the multiple print heads is greater than a preset value when printing on the first layout diagram, the second layout diagram, or the third layout diagram, a steel mesh is set between the output points of any two print heads.

7. A lattice concrete 3D printing method for large-scale component molding according to claim 1, characterized in that: In S4, the component to be printed is printed at a preset station, and after each layer of printing is completed, a top view image of the current layer is obtained, and the cutting line is positioned and calibrated; In S5, post-processing includes leveling and maintaining the printed component based on the cutting line.

8. An application of the lattice concrete 3D printing method for large-scale component molding according to any one of claims 1 to 7, characterized in that: Applied to 3D printing of concrete structures.

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