WO2022032882A1 - Procédé de division de grille et dispositif de division de grille pour boîte d'emballage, et support de stockage lisible par ordinateur - Google Patents

Procédé de division de grille et dispositif de division de grille pour boîte d'emballage, et support de stockage lisible par ordinateur Download PDF

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Publication number
WO2022032882A1
WO2022032882A1 PCT/CN2020/124796 CN2020124796W WO2022032882A1 WO 2022032882 A1 WO2022032882 A1 WO 2022032882A1 CN 2020124796 W CN2020124796 W CN 2020124796W WO 2022032882 A1 WO2022032882 A1 WO 2022032882A1
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WO
WIPO (PCT)
Prior art keywords
layer
grid
packing box
reference plane
meshing
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Application number
PCT/CN2020/124796
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English (en)
Chinese (zh)
Inventor
胡乾双
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惠州市华星光电技术有限公司
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Publication of WO2022032882A1 publication Critical patent/WO2022032882A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00—Details relating to the application field
    • G06F2113/20—Packaging, e.g. boxes or containers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30—Computing systems specially adapted for manufacturing

Definitions

  • the present application relates to the field of packaging box production, and in particular, to a grid dividing method, a grid dividing device and a computer-readable storage medium for a packaging box.
  • an embodiment of the present application provides a method for meshing a packing box, wherein the method for meshing a packing box includes the following steps:
  • the step S10 includes:
  • the number of layers of the layer structure is obtained according to the amount of reference meshes required to form all the layer structures by stretching.
  • the step S15 includes:
  • the step S20 includes:
  • the cell size is 3 to 5 times the size of the shortest side of the grid cells in the first grid structure.
  • the step S30 includes:
  • the step S30 before the step S31, the step S30 further includes:
  • S34 Determine the height to be stretched of the second grid structure of each layer according to the size of the layer structure of each layer in the three-dimensional model of the packing box.
  • an embodiment of the present application also provides a device for dividing a grid of a packing box, including:
  • the simulation model preprocessing module is used to obtain the three-dimensional model of the packing box and the contour lines of the orthographic projection of all layer structures of the packing box on the reference plane, and process the contour lines to form the first grid structure on the reference plane. ;
  • the 2D meshing module is used to perform 2D meshing on the reference surface according to the first meshing structure to form a second meshing structure on the reference surface; the 2D meshing module is also used to copy the second meshing structure on each layer of the layer structure, and move each layer of the layer structure to the corresponding position along the height direction of the packaging box, delete the second grid structure of each layer that does not overlap with the corresponding layer structure. part;
  • the 3D mesh division module is used to stretch the second mesh structure of each layer along the height direction of the packaging box to form a 3D solid mesh unit corresponding to the layer structure of each layer; 3D mesh division The module is also used to combine all the 3D solid mesh units to form a 3D solid mesh model of the packing box.
  • the simulation model preprocessing module is used to import the three-dimensional model of the packaging box, and save the three-dimensional model of each layer structure of the packaging box separately; establish a reference plane parallel to the bottom surface of the layer structure, and obtain the contour lines of the orthographic projection of all the layer structures on the datum plane; connect all nodes of the contour lines on the datum plane through the first horizontal connecting line and the second vertical connecting line, to forming a first grid structure on the reference plane;
  • the 2D meshing module is configured to set the unit size according to the size of the shortest side of the grid unit in the first grid structure; form a second grid structure on the reference plane, so as to carry out the calculation on the reference plane.
  • 2D grid division the size of the side of each grid unit in the second grid structure is equal to the unit size; copy the second grid structure to each layer of the layer structure, and put the The layer structure is moved to the corresponding position along the height direction of the packing box; the part of the second grid structure of each layer that does not overlap with the corresponding layer structure is deleted;
  • the 3D meshing module is used to stretch the second mesh structure of each layer along the height direction of the packing box to form a 3D solid mesh unit corresponding to the layer structure of each layer; delete all the first meshes. Second grid structure, and combine all the 3D solid grid units to form a 3D solid grid model of the packing box.
  • the simulation model preprocessing module is used for:
  • All nodes of the contour lines on the reference plane are connected by a first horizontal connecting line and a second vertical connecting line, so as to form a first grid structure on the reference plane.
  • the simulation model preprocessing module is further configured to process the three-dimensional model of the packing box to remove rounded corners and characters in the three-dimensional model of the packing box.
  • the simulation model pre-processing module when the simulation model pre-processing module reads the number of layers of the layer structure of the packaging box from the wire frame of the front view of the three-dimensional model of the packaging box, all the layers of the layer structure are formed according to stretching. The number of layers of the reference grid required to obtain the layer structure.
  • the simulation model preprocessing module is used for:
  • the 2D meshing module is used to:
  • a second grid structure is formed on the reference plane, and 2D grid division is performed on the reference plane, and the size of the side of each grid unit in the second grid structure is equal to the unit size;
  • the portion of the second grid structure of each layer that does not overlap with the corresponding layer structure is deleted, and the portion of the second grid structure of each layer that overlaps the corresponding layer structure is retained.
  • the cell size is 3 to 5 times the size of the shortest side of the grid cells in the first grid structure.
  • the 3D meshing module is used to:
  • the second grid structure of each layer is stretched along the height direction of the packaging box to form a 3D solid grid unit corresponding to the layer structure of each layer;
  • All the 3D solid mesh units are combined and assembled to form a 3D solid mesh model of the packing box.
  • the 3D grid division module is further configured to determine the height to be stretched of the second grid structure of each layer according to the size of the layer structures of each layer in the three-dimensional model of the packing box.
  • an embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program code, and the program code is used to cause a computer to execute a method for meshing a packing box.
  • a 3D solid grid unit corresponding to the layer structure is formed by stretching the second grid unit.
  • the size of each grid unit in the second grid structure is consistent, and the grid quality is high, which effectively improves the quality of grid division and reduces the size of the grid. Because of the simulation calculation error caused by the quality of the mesh, the analysis accuracy of the simulation calculation is improved.
  • FIG. 1 is a schematic structural diagram from a first perspective of a three-dimensional model of a packaging box in an embodiment of the application;
  • FIG. 2 is a schematic structural diagram of a three-dimensional model of a packaging box from a second perspective in an embodiment of the application;
  • Fig. 3 is the step schematic diagram of the grid division of packing box model in the application.
  • FIG. 4 to FIG. 20 are schematic diagrams of the meshing flow of the packing box in an embodiment of the present application.
  • the drawn grid is relatively rough, and the quality of the grid is low. error, which leads to technical problems with low simulation calculation accuracy.
  • the packing box 10 includes a multi-layer structure 11 .
  • the meshing method of the packing box 10 includes the following steps:
  • the packing box 10 can be meshed by using meshing software, and the meshing software can be Hypermesh software.
  • the size of the shortest side of the set element size determines the size of the mesh element in the second mesh structure formed by mesh division, and the second mesh element is stretched to form a 3D solid mesh element corresponding to the layer structure 11 one-to-one.
  • the size of each grid unit in the second grid structure is consistent, the grid quality is high, and the size of each grid unit in the second grid structure is more accurate, so that the packing box 10 can be adjusted according to the divided second grid unit.
  • the accuracy of the simulation calculation is higher.
  • the step S10 includes:
  • the three-dimensional model of the packing box 10 can be constructed by three-dimensional model processing software such as UG, Solidworks, and Proe.
  • the packaging box 10 for packaging the display panel is generally symmetrical in structure up and down and left and right.
  • the packaging box 10 for packaging the display panel is divided into grids, in the step S11, only the packaging box can be divided into two parts.
  • a quarter of the three-dimensional model of 10 is imported into the meshing software for processing;
  • the packaging box 10 used to package the display panel assembly is mostly a left-right symmetrical structure, because the display panel assembly is provided with flexible connecting materials and The space occupied by the ends of the circuit board and other devices is larger than the rest of the ends, so the top and bottom of the packaging box 10 for packaging the display panel assembly is asymmetrical.
  • step S11 only the left half or the right half of the three-dimensional model of the packing box 10 may be imported into the meshing software for processing.
  • the step S10 further includes:
  • three-dimensional processing software can be used to remove small structures such as rounded corners and characters in the three-dimensional model of the packing box 10, so as to facilitate the meshing of the packing box 10 later.
  • the number of layers of the layer structure 11 is obtained according to the types and amounts of the reference grids required to form all the layer structures 11 by stretching.
  • the layer structures 11 of the packaging box 10 are all formed by stretching the reference grid, and the layer structures 11 that can be stretched from the same reference grid are all the same layer-by-layer structure 11 , and different layer structures 11 need to be formed by stretching different types of reference grids, and the number of layers of the layer structure 11 is determined according to the type and quantity of the required reference grids, so as to ensure the size of the layer structure 11 formed by stretching. and shape accuracy is higher.
  • the step S15 includes:
  • the reference plane can be 10 mm, which can facilitate the calculation of the moving distance of the second grid structure in the future.
  • the step S20 includes:
  • step S25 includes:
  • the three-dimensional model of the packing box 10 can be imported into the processing interface of each grid unit in the meshing software as a reference, so as to facilitate the Layer
  • the layer structure 11 is moved to a corresponding position along the height direction of the packaging box 10 .
  • the unit size is 3 to 5 times the size of the shortest side of the grid unit in the first grid structure.
  • the unit size can be set relatively small, and for the large-sized packing box 10, in order to save calculation time, the unit size can be set relatively large.
  • the step S30 includes:
  • the step S30 further includes:
  • each layer structure 11 may include multiple layers of 3D grid units, and each layer of 3D grid units is formed by stretching the second grid structure, and the stretched height of each layer of 3D grid units is And the number of layers of the 3D grid unit in each layer structure 11 can be determined according to the size of the packing box 10, the number of grid controls, etc., and each grid unit in the 3D grid unit can be a cube, so that the 3D grid Grid cells are squarer and more accurate in size.
  • the step S33 includes:
  • FIGS. 4 to 20 are schematic diagrams of the mesh dividing flow of the packaging box 10 .
  • the packing box 10 is a left-right symmetrical structure.
  • the three-dimensional model processing software small structures such as rounded corners and characters in the three-dimensional model of the packing box 10 are removed, and the left half of the three-dimensional model of the packing box 10 is imported into the network.
  • the 3D model imported into the grid division software is generally a solid body. Therefore, the solid body of the 3D model of the packing box 10 needs to be hidden in the grid division software, and the outline of the 3D model of the packing box 10 should be preserved.
  • the number of layers of the layer structure 11 of the packaging box 10 is read from the wire frame of the front view of the three-dimensional model of the packaging box 10 .
  • the first layer structure 111 , the second layer structure 112 , the third layer structure 113 , the fourth layer structure 114 , the fifth layer structure 115 , the sixth layer structure 116 and the seventh layer structure 117 , the three-dimensional model of the 7-layer structure 11 is saved separately in the meshing software.
  • the slope corner point in Figure 5 is the slope corner point of the desiccant tank, and the slope surface can be approximated as a straight surface.
  • all nodes 50 of the contour lines on the reference plane 20 are connected by a first horizontal connecting line and a second vertical connecting line to form a first grid structure 30 on the reference plane 20 .
  • the preparation material of the display panel assembly generally includes EPS (expandable polystyrene), and the preparation material of the packaging box 10 generally includes EPO (expandable polyethylene).
  • EPS expandable polystyrene
  • EPO expandable polyethylene
  • a second grid structure 40 is formed on the reference plane 20 , and the reference plane 20 is divided into 2D meshes.
  • the size of the side of each grid cell in the second grid structure 40 is equal to the cell size b .
  • the part of the second grid structure 40 of each layer that does not overlap with the corresponding layer structure 11 is deleted, and the corresponding layer structure 11 on each layer of the second grid structure 40 is retained.
  • the second grid structure 40 of each layer is stretched along the height direction of the packing box 10 to form a 3D solid grid unit corresponding to each layer of the layer structure 11 one-to-one, as shown in FIG. 13 19 respectively correspond to the first layer structure 111, the second layer structure 112, the third layer structure 113, the fourth layer structure 114, the fifth layer structure 115, the sixth layer structure 116 and the seventh layer 3D solid grid cells of layer structure 117 .
  • delete the second mesh structure 40 on all layer structures 11 move all 3D solid mesh units corresponding to the layer structure 11 to the model building interface, and refer to the three-dimensional model of the packing box 10
  • the positions of the layer structure 11 are combined with all 3D solid mesh units to form a 3D solid mesh model of the packaging box 10 .
  • the meshing device for packing boxes 10 includes a simulation model preprocessing module, a 2D meshing module and a 3D meshing module. module.
  • the simulation model preprocessing module is used to obtain the three-dimensional model of the packing box 10 and the contour lines of the orthographic projection of all the layer structures 11 of the packing box 10 on the reference plane, and process the contour lines to form the contour lines on the reference plane.
  • the first grid structure 30 is used to obtain the three-dimensional model of the packing box 10 and the contour lines of the orthographic projection of all the layer structures 11 of the packing box 10 on the reference plane, and process the contour lines to form the contour lines on the reference plane.
  • the first grid structure 30 is used to obtain the three-dimensional model of the packing box 10 and the contour lines of the orthographic projection of all the layer structures 11 of the packing box 10 on the reference plane, and process the contour lines to form the contour lines on the reference plane.
  • the three-dimensional model of the layer structure 11 of each layer of the packaging box 10 is stored separately in the simulation model preprocessing module, and then a parallel to the layer structure 11 is created in the simulation model preprocessing module.
  • the reference plane 20 of the bottom surface of the structure 11 is obtained, and the contour lines of the orthographic projection of all the layer structures 11 on the reference plane 20 are obtained, and all the nodes 50 of the contour lines pass through the horizontal first connecting line and the vertical second connecting line.
  • the connection lines are connected to form the first mesh structure 30 on the reference plane 20 .
  • the simulation model preprocessing module is used to import the three-dimensional model of the packing box 10; hide the entity of the three-dimensional model of the packing box 10, and retain the outline of the three-dimensional model of the packing box 10; from the front view of the three-dimensional model of the packing box 10 Read the number of layers of the layer structure 11 of the packaging box 10 from the wireframe of the figure; save the three-dimensional model of the layer structure 11 for each layer separately; establish a reference plane 20 parallel to the bottom surface of the layer structure 11, and obtain The contour lines of the orthographic projection of all the layer structures 11 on the reference plane 20; all nodes 50 of the contour lines on the reference plane 20 are connected by a first horizontal connecting line and a second vertical connecting line , so as to form the first grid structure 30 on the reference plane 20 .
  • the simulation model preprocessing module is further used to process the three-dimensional model of the packing box 10 to remove rounded corners and characters in the three-dimensional model of the packing box 10 .
  • the simulation model pre-processing module reads the number of layers of the layer structure 11 of the packaging box 10 from the wire frame of the front view of the three-dimensional model of the packaging box 10, it forms all the layers of the layer structure 11 according to stretching.
  • the number of layers of the layer structure 11 is obtained according to the type of reference grid required.
  • the simulation model preprocessing module is used to establish The reference plane 20 is parallel to the bottom surface of the layer structure 11; the reference plane 20 is moved along the height direction of the packaging box 10 to the top of the three-dimensional model of the packaging box 10, and the reference plane 20 is aligned with the packaging There is a gap between the top surfaces of the boxes 10 ; the contour lines of the orthographic projection of all the layer structures 11 on the reference plane 20 are obtained.
  • the 2D meshing module is used to perform 2D meshing on the reference plane 20 according to the first grid structure 30 to form the second grid structure 40 on the reference plane 20; the 2D meshing module also uses After copying the second grid structure 40 to the layer structure 11 of each layer, and moving the layer structure 11 of each layer to the corresponding position along the height direction of the packing box 10, delete the second grid layer of each layer The portion of the structure 40 that does not overlap with the corresponding layer structure 11 .
  • the unit size is set according to the size of the shortest side of the grid unit in the first grid structure 30, and the 2D meshing module forms the second grid structure 40 on the reference plane according to the unit size, and the The size of the side of each grid cell in the second grid structure 40 is equal to the cell size.
  • the 2D meshing module is used to measure the size of the shortest side of the grid unit in the first grid structure 30; The size sets the unit size; a second grid structure 40 is formed on the reference plane 20, and 2D grid division is performed on the reference plane 20.
  • the side of each grid cell in the second grid structure 40 is The size is equal to the unit size; check the size of each grid unit in the second grid structure 40, and output the inspection result; if the inspection result meets the preset requirements, copy the second grid structure 40 to each layer described in on the layer structure 11, and move each layer of the layer structure 11 to the corresponding position along the height direction of the packing box 10; delete the part of each layer of the second grid structure 40 that does not overlap with the corresponding layer structure 11 , the portion of each layer of the second grid structure 40 that overlaps with the corresponding layer structure 11 is reserved.
  • the unit size is 3 to 5 times the size of the shortest side of the grid unit in the first grid structure 30 .
  • the 3D meshing module is used to stretch the second mesh structure 40 of each layer along the height direction of the packaging box 10 to form a 3D solid mesh corresponding to the layer structures 11 of each layer.
  • Grid unit; the 3D mesh division module is further configured to combine all the 3D solid grid units to form a 3D solid grid model of the packing box 10 .
  • the 3D meshing module is used to stretch the second mesh structure 40 of each layer along the height direction of the packaging box 10 to form a 3D solid mesh corresponding to the layer structures 11 of each layer. grid unit; delete all the second grid structures 40 ; combine all the 3D solid grid units to form a 3D solid grid model of the packing box 10 .
  • the 3D grid is further configured to determine the height to be stretched of each layer of the second grid structure 40 according to the size of each layer of the layer structure 11 in the three-dimensional model of the packing box 10 .
  • the present application further discloses a computer-readable storage medium, where the computer-readable storage medium stores program codes, and the program codes are used to cause a computer to execute any of the above-mentioned embodiments.
  • the grid division method of the packing box is not limited to the above meshing method for packing boxes.
  • the computer-readable storage medium may be a non-volatile readable storage medium, and a computer program code is stored in the readable storage medium, and the computer program instructs the server to execute the grid division method of the packing box in the present application.
  • the readable storage medium may include various storage media that can store program codes, such as read-only memory, random access memory, magnetic disk or optical disk.

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Abstract

L'invention concerne un procédé et un dispositif de division de grille pour une boîte d'emballage (10), et un support de stockage lisible par ordinateur. Le procédé de division de grille pour une boîte d'emballage (10) consiste à : former une seconde structure de grille (40) sur une surface de référence ; copier la seconde structure de grille (40) sur chaque couche d'une structure en couches (11) ; supprimer la partie de chaque couche de la seconde structure de grille (40) qui n'est pas en chevauchement avec la structure en couches correspondante (11) ; étirer chaque couche de la seconde structure de grille (40) pour former des unités de grille d'entité 3D correspondant à diverses couches de la structure en couches (11) sur une base une à une ; et combiner toutes les unités de grille d'entité 3D pour la construction, afin de former un modèle de grille d'entité 3D pour la boîte d'emballage (10).
PCT/CN2020/124796 2020-08-12 2020-10-29 Procédé de division de grille et dispositif de division de grille pour boîte d'emballage, et support de stockage lisible par ordinateur WO2022032882A1 (fr)

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CN202010807222.X 2020-08-12
CN202010807222.XA CN112037335B (zh) 2020-08-12 2020-08-12 包装箱的网格划分方法、网格划分装置及计算机可读存储介质

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CN101303774A (zh) * 2008-06-12 2008-11-12 大连工业大学 基于三维实体模型的四边形有限元网格生成方法
CN104828398A (zh) * 2015-05-19 2015-08-12 深圳市华星光电技术有限公司 一种液晶面板包装箱
CN107464285A (zh) * 2017-06-26 2017-12-12 北京长城华冠汽车科技股份有限公司 一种三维模型的网格划分方法和装置
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