Positioning jig

Abstract

The utility model relates to a positioning jig which comprises a bottom plate and a plurality of positioning columns arranged on the bottom plate, the bottom plate and the positioning columns are each composed of a hollowed-out structural part and a covering part, the covering parts cover the outer surfaces of the hollowed-out structural parts, each hollowed-out structural part comprises a plurality of lattice unit layers, and the lattice unit layers are sequentially stacked to form a preset shape; each lattice unit layer comprises a plurality of lattice units, each lattice unit comprises an outer frame, an inner frame and a supporting part, the inner frame is arranged in the outer frame, and the supporting part is arranged between the outer frame and the inner frame and connected with the outer frame and the inner frame. According to the positioning jig, the lightweight design of the jig can be achieved, the overall weight is obviously reduced, and the labor intensity of workers in the using process is relieved; meanwhile, the structural design of the lattice unit layer enhances the overall strength and stability of the jig; in addition, the hollow structure reduces the material usage amount, and the surface optimization of the covering part is combined, so that the material utilization rate is further improved, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of additive manufacturing technology, specifically to a positioning fixture. Background Technology

[0002] Currently, most positioning fixtures are manufactured using traditional CNC (Computer Numerical Control) methods. However, positioning fixtures with slightly more complex structures tend to have a larger overall mass and lower strength, increasing the workload of operators during use. The current manufacturing of positioning fixtures primarily relies on traditional CNC machining. While this method can meet certain accuracy requirements, it has significant limitations when manufacturing complex positioning fixtures. Because CNC machining achieves part forming by removing material, the overall mass of the fixture is relatively large, and the structural strength is relatively low, especially in the design of complex geometries, where it is difficult to achieve optimal material distribution. Furthermore, the heavier fixtures increase the workload of operators and reduce work efficiency. At the same time, material waste generated during CNC machining also increases production costs and is detrimental to the efficient use of resources. Therefore, there is an urgent need for a manufacturing technology that can achieve lightweight, high-strength, and environmentally friendly production to improve the development process of positioning fixtures. Utility Model Content

[0003] In view of the above, it is necessary to propose a positioning fixture that is lightweight and has high strength in order to reduce the labor intensity of personnel during use.

[0004] This application provides a positioning fixture, including a base plate and a plurality of positioning posts disposed on the base plate. Both the base plate and the positioning posts are composed of a hollow structure and a cover. The cover is disposed on the outer surface of the hollow structure. The hollow structure includes a plurality of lattice unit layers, which are stacked sequentially to form a preset shape. Each lattice unit layer includes a plurality of lattice units. Each lattice unit includes an outer frame, an inner frame, and a support portion. The inner frame is disposed within the outer frame, and the support portion is disposed between the outer frame and the inner frame and is respectively connected to the outer frame and the inner frame.

[0005] In some embodiments, the outer frame includes a plurality of first polygonal structures, which are connected to form a first three-dimensional structure; the inner frame includes a plurality of second polygonal structures, which are connected to form a second three-dimensional structure; the second three-dimensional structure is disposed within the first three-dimensional structure; and the supporting portion is connected to the second polygonal structures and the first polygonal structures respectively.

[0006] In some embodiments, a plurality of second polygonal structures are respectively configured to correspond one-to-one with a plurality of first polygonal structures.

[0007] In some embodiments, the centers of the outer frame and the inner frame coincide.

[0008] In some embodiments, the support portion includes a plurality of connecting rods, and the plurality of connecting rods, the plurality of second polygonal structures, and the plurality of first polygonal structures are respectively disposed accordingly, with each connecting rod connecting to the corresponding second polygonal structure and the first polygonal structure.

[0009] In some embodiments, each connecting rod includes two connecting rods arranged crosswise, one end of each connecting rod is connected to a corresponding second polygonal structure, and the other end of each connecting rod is connected to a corresponding first polygonal structure.

[0010] In some embodiments, the included angle between any two links in each lattice unit ranges from 15° to 90°.

[0011] In some embodiments, the diameter of each link is greater than 0.2 mm.

[0012] In some embodiments, the positioning fixture further includes a plurality of support structures disposed within a plurality of lattice units of the lattice unit layer near the cover. Each support structure is located between the inner frame and the outer frame of the corresponding lattice unit. One end of each support structure is connected to the side of the inner frame near the cover, and the other end of each support structure is flush with the side of the outer frame near the cover.

[0013] In some embodiments, the support structure includes a connector and a support. One end of the connector is connected to the side of the inner frame near the cover, and the other end of the connector is connected to the support. The side of the support away from the connector is flush with the side of the outer frame near the cover. A groove is provided on the side of the connector connected to the inner frame.

[0014] The aforementioned positioning fixture employs a combination of hollow structural components and cover parts. Using additive manufacturing technology, it constructs a hollow structural component composed of multiple lattice unit layers, each including an outer frame, an inner frame, and a support component. The support component between the outer and inner frames forms an optimized internal support network, achieving a lightweight design that significantly reduces overall weight and labor intensity during use. Simultaneously, the lattice unit layer structure enhances the fixture's overall strength and stability, effectively withstanding loads and stresses under complex working conditions. Furthermore, the hollow structure reduces material usage, and combined with surface optimization of the cover parts, further improves material utilization and reduces production costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the positioning fixture provided in the embodiments of this application.

[0016] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the positioning fixture along the AA direction.

[0017] Figure 3 yes Figure 2 The diagram shows a three-dimensional structure of a crystal lattice unit.

[0018] Figure 4 yes Figure 3 The diagram shows the exploded structure of a crystal unit cell.

[0019] Figure 5 yes Figure 2 A schematic diagram of the three-dimensional structure of another lattice unit is shown.

[0020] Figure 6 yes Figure 5 The diagram shows a cross-sectional view of the positioning fixture along the BB direction.

[0021] Key component symbols: Positioning jig 100, base plate 110, positioning post 120, hollow structure 130, lattice unit layer 131, lattice unit 1311, outer frame 1311a, first polygonal structure 1311a1, inner frame 1311b, second polygonal structure 1311b1, support part 1311c, connecting rod 1311c1, link 1311c 11 , Cover 140, Support structure 150, Connector 151, Support 152, Groove 153, Workpiece 200. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0023] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, it should be noted that "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0026] Please see Figure 1 This application provides a positioning fixture 100, which is applied in the 3C manufacturing and automotive manufacturing industries. It includes a base plate 110 and multiple positioning posts 120, which are used to support / position the workpiece 200.

[0027] Please see also Figure 2 Multiple positioning posts 120 are disposed on the base plate 110, wherein there are eight positioning posts 120 spaced apart. Both the base plate 110 and the positioning posts 120 are composed of a hollow structural component 130 and a covering component 140. The covering component 140 covers the outer surface of the hollow structural component 130. The hollow structural component 130 and the covering component 140 can be an integral structure or separate structures. The hollow structural component 130 includes multiple lattice unit layers 131, which are stacked sequentially to form a preset shape. The preset shape can be plate-shaped or column-shaped, but is not limited to these. Each lattice unit layer 131 includes multiple lattice units 1311, please refer to [reference needed]. Figure 3Each lattice unit 1311 includes an outer frame 1311a, an inner frame 1311b, and a support portion 1311c. The inner frame 1311b is disposed inside the outer frame 1311a, and the support portion 1311c is disposed between the outer frame 1311a and the inner frame 1311b and is connected to the outer frame 1311a and the inner frame 1311b respectively.

[0028] Please see also Figure 4 In some embodiments, the outer frame 1311a includes multiple first polygonal structures 1311a1, which are connected to form a first three-dimensional structure. The inner frame 1311b includes multiple second polygonal structures 1311b1, which are connected to form a second three-dimensional structure. The second three-dimensional structure is disposed within the first three-dimensional structure. The support portion 1311c connects the second polygonal structures 1311b1 and the first polygonal structures 1311a1 respectively. Specifically, the first polygonal structures 1311a1 are regular octagons, and there are six of them. The first polygonal structures 1311a1 are cubes. The second polygonal structures 1311b1 are regular octagons, and there are six of them. The second three-dimensional structure is a cube. Through the polygonal three-dimensional design of the outer frame 1311a and the inner frame 1311b, combined with the connecting effect of the support portion 1311c, the overall strength and impact resistance are significantly enhanced.

[0029] In some embodiments, a plurality of second polygonal structures 1311b1 are respectively configured in a one-to-one correspondence with a plurality of first polygonal structures 1311a1. This enables precise matching and uniform stress distribution between the outer frame 1311a and the inner frame 1311b, thereby further improving the stability and strength of the overall structure. Through this one-to-one connection, the support portion 1311c can more effectively transmit and disperse external forces, reduce stress concentration, and enhance resistance to deformation and impact.

[0030] In some embodiments, the centers of the outer frame 1311a and the inner frame 1311b coincide. This center coincidence allows the support portion 1311c to connect the outer frame 1311a and the inner frame 1311b in an optimal manner, effectively dispersing external forces and reducing stress concentration, thereby further enhancing resistance to deformation and impact. In addition, this symmetrical design simplifies the manufacturing and assembly process and improves the consistency and precision of the structure.

[0031] In some embodiments, the support portion 1311c includes a plurality of connecting rods 1311c1. The plurality of connecting rods 1311c1, a plurality of second polygonal structures 1311b1, and a plurality of first polygonal structures 1311a1 are respectively disposed correspondingly. Each connecting rod 1311c1 connects to a corresponding second polygonal structure 1311b1 and a first polygonal structure 1311a1. Specifically, there are twelve connecting rods 1311c1, and each second polygonal structure 1311b1 and each first polygonal structure 1311a1 are connected to four connecting rods 1311c1. Thus, by having each connecting rod 1311c1 correspondingly connect to a second polygonal structure 1311b1 and a first polygonal structure 1311a1, external forces can be effectively dispersed and stress transmission paths optimized, stress concentration phenomena reduced, and resistance to deformation and impact enhanced.

[0032] In some embodiments, each connecting rod 1311c1 includes two connecting rods 1311c. 11 Two connecting rods 1311c 11 Cross-connection, two links 1311c 11 One end is connected to the corresponding second polygonal structure 1311b1, and the two connecting rods 1311c. 11 The other end is connected to the corresponding first polygonal structure 1311a1, wherein each link 1311c 11 The connecting rods 1311c are all connected to the endpoints of the first polygonal structure 1311a1 and the second polygonal structure 1311b1. Thus, the intersecting connecting rods 1311c... 11 This forms a highly efficient triangular support structure 150, which can withstand tension, compression, and torsion regardless of the force applied to the links 1311c. 11 The mutual restraint and absorption of external forces enhance the structure, evenly dispersing external forces and optimizing stress transmission paths, thereby reducing stress concentration and improving overall strength and impact resistance. Furthermore, this design further improves the symmetry and rigidity of the structure, while increasing the overall toughness of the structure through cross-connection, enabling it to remain stable under complex loads.

[0033] In some embodiments, any two links 1311c in each lattice unit 1311 11 The included angle α between them ranges from 15° to 90°. Specifically, α can be 15°, 30°, 40°, 50°, 60°, 70°, 80°, or 90°. Thus, a smaller included angle (such as 15°) can increase the number of connecting rods 1311c. 11 The density increases the overall rigidity and stability of the structure, making it suitable for scenarios requiring high strength; while a larger included angle (such as 90°) can expand the support range, enhance the structure's resistance to deformation and the uniformity of load distribution, while also helping to reduce weight and improve heat dissipation performance.

[0034] In some embodiments, each link 1311c 11 The diameter is greater than 0.2mm. This ensures that the connecting rod 1311c... 11 It possesses sufficient strength and rigidity to effectively support the connection between the outer frame 1311a and the inner frame 1311b, thereby enhancing the stability and load-bearing capacity of the overall structure.

[0035] Please see Figure 5 In some embodiments, the positioning fixture 100 further includes multiple support structures 150. These support structures 150 are disposed within multiple lattice units 1311 of the lattice unit layer near the cover member 140. Each support structure 150 is located between the inner frame 1311b and the outer frame 1311a of the corresponding lattice unit 1311. One end of each support structure 150 is connected to the side of the inner frame 1311b near the cover member 140, and the other end of each support structure 150 is flush with the side of the outer frame 1311a near the cover member 140. Thus, by connecting the inner frame 1311b and the outer frame 1311a, the support structures 150 effectively disperse the external force transmitted by the cover member 140, reducing stress concentration and improving resistance to deformation and impact. Simultaneously, the flush design of the support structures 150 with the outer frame 1311a ensures a tight fit between the cover member 140 and the lattice unit layer, further improving the overall integrity and load-bearing uniformity of the structure.

[0036] Please see Figure 6 In some embodiments, the support structure 150 includes a connector 151 and a support 152. The connector 151 is a columnar structure, and the support 152 is a flat, ring-shaped structure. One end of the connector 151 is connected to the side of the inner frame 1311b near the cover 140, and the other end of the connector 151 is connected to the support 152. The side of the support 152 facing away from the connector 151 is flush with the side of the outer frame 1311a near the cover 140. A groove 153 is formed on the side of the connector 151 connected to the inner frame 1311b. Specifically, the support structure 150 is a T-shaped structure and a rotating body, and part of the bottom of the groove 153 penetrates through the support 152. Thus, the connection between the connector 151 and the inner frame 1311b, and the flush design between the support 152 and the outer frame 1311a, effectively enhance the local support strength and overall stability, while optimizing the stress transmission path and reducing stress concentration. The design of the groove 153 not only reduces the weight of the support structure 150, but also improves the efficiency of material utilization, and may provide additional space for heat dissipation or assembly.

[0037] The base plate 110 and positioning post 120 in the aforementioned positioning fixture 100 are both composed of hollow structural components 130 and cover components 140. By adopting a combined design of hollow structural components 130 and cover components 140, the hollow structural components 130, composed of multiple lattice unit layers 131, are constructed layer by layer using additive manufacturing technology. Each lattice unit layer 131 includes an outer frame 1311a, an inner frame 1311b, and a support portion 1311c. An optimized internal support network is formed by the support portion 1311c between the outer frame 1311a and the inner frame 1311b, thereby achieving a lightweight design of the positioning fixture 100, significantly reducing the overall weight, and reducing the labor intensity of personnel during use. At the same time, the structural design of the lattice unit layer 131 enhances the overall strength and stability of the positioning fixture 100, and can effectively withstand the loads and stresses under complex working conditions. In addition, the hollow structure reduces the amount of material used, and combined with the surface optimization of the cover component 140, it further improves the material utilization rate and reduces production costs.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

[0039] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A positioning jig characterized by, The system includes a base plate and multiple positioning posts disposed on the base plate. Both the base plate and the positioning posts are composed of a perforated structural member and a cover member. The cover member covers the outer surface of the perforated structural member. The hollow structure includes multiple lattice unit layers, which are stacked sequentially to form a preset shape. Each lattice unit layer includes multiple lattice units, and each lattice unit includes an outer frame, an inner frame, and a support portion. The inner frame is located inside the outer frame, and the support portion is located between the outer frame and the inner frame and is connected to both the outer frame and the inner frame.

2. The positioning fixture of claim 1, wherein The outer frame includes multiple first polygonal structures, which are connected to form a first three-dimensional structure. The inner frame includes multiple second polygonal structures, which are connected to form a second three-dimensional structure. The second three-dimensional structure is disposed within the first three-dimensional structure. The supporting portion is connected to the second polygonal structures and the first polygonal structures respectively.

3. The positioning fixture of claim 2, wherein Each of the second polygonal structures is configured to correspond one-to-one with each of the first polygonal structures.

4. The positioning fixture of claim 3, wherein The centers of the outer frame and the inner frame coincide.

5. The positioning fixture of claim 4, wherein The support includes multiple connecting rods, and the multiple connecting rods, multiple second polygonal structures and multiple first polygonal structures are respectively arranged accordingly. Each connecting rod connects to the corresponding second polygonal structure and the first polygonal structure.

6. The positioning fixture of claim 5, wherein Each connecting rod includes two connecting rods, which are arranged crosswise. One end of each connecting rod is connected to the corresponding second polygonal structure, and the other end of each connecting rod is connected to the corresponding first polygonal structure.

7. The positioning fixture of claim 6, wherein The included angle between any two links in each lattice unit ranges from 15° to 90°.

8. The positioning fixture of claim 6, wherein, Each of the aforementioned links has a diameter greater than 0.2 mm.

9. The positioning fixture of claim 1, wherein, The positioning fixture further includes multiple support structures, which are disposed within multiple lattice units of the lattice unit layer near the cover. Each support structure is located between the inner frame and the outer frame of the corresponding lattice unit. One end of each support structure is connected to the side of the inner frame near the cover, and the other end of each support structure is flush with the side of the outer frame near the cover.

10. The positioning fixture of claim 9, wherein, The support structure includes a connector and a support. One end of the connector is connected to the inner frame near the cover, and the other end of the connector is connected to the support. The side of the support away from the connector is flush with the side of the outer frame near the cover. A groove is provided on the side of the connector connected to the inner frame.

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