Design method of drilling jig for drilling large-size composite wallboard

Abstract

The invention discloses a design method of a drilling jig for drilling a large-size composite wallboard. The design method comprises the following steps: nesting design; mutually nested structures are arranged between the beam and rib drill jigs and the adjacent wall and rib drill jigs, and gaps are formed between the nested structures of the adjacent drill jigs; hole site coordination design; after the positioning positions of the drill jigs are determined, other drill jigs with the periphery assembled with the drill jigs are identified, and mutual trimming is designed at the positions of the nested structures on the drill jigs according to the nested design structures; the nested structure is designed in a differentiated manner; and aiming at a plurality of drill jigs with similar structures, which have a coordination relationship with the same drill jig, nesting structures with different shapes are designed for the drill jigs with the similar structures. Physical mistake proofing and nesting design is carried out on drill jigs of similar structures, the drill jigs can meet the requirement for simultaneous racking and combined use, and through the nesting design between the drill jigs, the problem that drilling is out of tolerance due to mistaken mounting and reverse mounting of the drill jigs is effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of hole-making technology, specifically relating to a drilling jig for large-size composite wall panels and its design method. Background Technology

[0002] Aircraft structures are typically sealed structures formed by connecting external components to a frame structure. These external components are often composite materials. Manufacturing such sealed structures requires numerous connectors to link the external components to the frame structure. A crucial step in achieving this connection is creating connection holes in both the external components and the frame structure. Due to the unique nature of current large-size composite component manufacturing processes, large-size panels cannot yet be precisely positioned. Therefore, assembly connection holes cannot be created while the composite panel is being manufactured. Furthermore, the complex assembly relationships within the internal frame structure present challenges when drilling holes from the frame to the panel, including limited operating space, low drilling efficiency, difficulty in ensuring hole perpendicularity and positional accuracy, and the risk of splitting at the hole edge of the composite panel. Therefore, current processes require drilling holes from one side of the panel towards the frame after the positional relationship between the composite panel and the frame structure is determined.

[0003] Currently, drilling jigs are used when drilling holes from one side of the composite panel towards the frame. However, because the internal frame is mostly composed of beams, ribs, and walls with similar shapes and sizes, and because aircraft wing structures are typically symmetrical with similar upper and lower wing frame structures, and the external composite components are large-sized integral panels, a large number of drilling jigs for panel drilling have similar structures and sizes. This makes it difficult to distinguish between jigs when they are stored together, and there is a risk of incorrect jig installation, leading to out-of-tolerance drilling, which can result in rework or even scrap. Furthermore, the number and variety of connecting holes on the drilling jigs (from K1 to Kn) increase the risk of incorrect hole diameters.

[0004] Under current assembly conditions, the assembly relationships of the beams and ribs in the skeleton structure are complex, with various fitting, overlapping, and mating relationships between structures. Existing drilling jig design methods typically only focus on the design of drilling jigs for drilling holes in individual parts, without considering the mating relationships between surrounding parts with assembly connections. This leads to interference between drilling jigs when used in combination, making it impossible to simultaneously position and drill holes. Large-size wall panels require a large number of drilling jigs, with hundreds for a single panel. When drilling jigs interfere with each other, they need to be placed on the frame multiple times, resulting in low drilling efficiency and long assembly cycles. Summary of the Invention

[0005] The purpose of this invention is to provide a design method for drilling jigs for large-size composite wall panels, in order to solve the problems of interference when drilling jigs are used in combination, inability to use them simultaneously, and easy misassembly of a large number of drilling jigs in the design and use of drilling jigs for large-size composite wall panels.

[0006] This invention is achieved through the following technical solution: A design method for drilling jigs for large-size composite wall panels, wherein the shape of the drilling jig base is based on the internal drilling parts of the wall panel, and the drilling jig base is designed with trimmed edges and nested according to the surrounding drilling jig group to form a nested drilling jig group; including: Nested design; nested structures are set between the skeleton drill jigs, and gaps are set between adjacent nested drill jig structures; Hole position coordination design; after determining the positioning position of the drill jig, identify other drill jigs that have an assembly relationship with the drill jig, and design mutual cutting edges at the nesting structure position on the drill jig according to the nesting design structure; Nested structure differentiation design: For multiple similar drill jigs that have a coordination relationship with the same drill jig, nested structures of different shapes are designed for drill jigs with similar structures.

[0007] In some embodiments of the present invention, the step of designing mutually tangent edges at the nested structure positions on the drill jig according to the nested design structure is as follows: Let the minimum allowable wall thickness of the drill jig hole be h, the spacing between the bottom holes of the drill jig hole be D, the radii of the bottom holes of the two drill jig holes be d1 and d2 respectively, the maximum trimmed edge size be G, and the actual wall thickness after trimming be H. Then H = (D - d1 - d2 - G) / 2. When H < h, change the cutting edge position and transfer one of the holes to another drill jig; if the holes coordinated by the two drill jigs at the nested position still cannot meet the minimum wall thickness requirement of the drill jig hole, then delete the hole.

[0008] In some embodiments of the present invention, for the left and right symmetrical drill jig designs, a nested structure with different structures is designed for the left drill jig and the right drill jig.

[0009] In some embodiments of the present invention, when designing similar structure drill jigs, different hole diameters are used to distinguish the specifications of the connectors and form a unified standard hole diameter.

[0010] In some embodiments of the present invention, let d be the diameter of a certain specification of connector, δd be the hole-making tolerance of different grades, a be the hole diameter in the hole diameter standard sample card, and A be the drill jig hole diameter in the hole diameter standard sample card; if a1-d1≤δd1, then A1 corresponding to a1 is selected as the drill jig hole diameter when making holes in the connector.

[0011] In some embodiments of the present invention, when designing similar structure drill jigs, different colors are used to distinguish the specifications of the connectors and a unified standard color is used for identification.

[0012] In some embodiments of the present invention, multiple positioning holes / tensioning holes are designed on the drill jig, and markings are set at the corresponding positions of the positioning holes / tensioning holes.

[0013] In some embodiments of the present invention, arrow markings for machining the BL, STA, and WL directions are respectively provided on the drill jig.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention employs a physical error-proofing and nesting design for similar structured drill jigs, enabling the drill jigs to meet the requirements of simultaneous assembly and use. Furthermore, the nesting design between drill jigs effectively solves the problem of excessive hole drilling caused by incorrect or reversed installation of drill jigs.

[0015] The nested design ensures clear installation of the drill jig, avoiding the problem of out-of-tolerance holes caused by incorrect drill jig positioning. At the same time, the nested structure between drill jigs increases the number of drill jigs that can be positioned at one time, reducing the working time for positioning and drilling a single wing-shaped drill jig by more than 20%. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the drill jig group structure in the nested pattern of large-size wall panels in an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A partial schematic diagram of the nested structure of the drill jig.

[0019] Figure 3 This is a schematic diagram showing the relationship between the bottom hole cutting edge and wall thickness in the hole position coordination design of this invention.

[0020] Figure 4 This is a structural diagram of a nested drill jig with similar structures, representing a different design in an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram showing the difference in hole diameter and color on similar drill jigs in an embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the positioning hole marking structure in an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the heading arrow markings in an embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram showing the hole position designed from drill jig 1 onto drill jig 2 in an embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0026] This invention addresses the scenario of drilling holes in a single, ultra-large integral wall panel where there are many drilling jigs, complex coordination relationships, and similar external structures. It proposes a drilling jig design method that can not only meet the requirements of simultaneous mounting and positioning but also effectively solve the problems of incorrect drilling jig installation, incorrect use, and incorrect hole diameter.

[0027] In some embodiments of the present invention, the method for designing drilling jigs for large-size composite wall panels is described with reference to... Figure 1 , Figure 2 ,include: 1. Physical error prevention design S011, Nested anti-drill jig misassembly design; The drill jigs feature a nested structure, providing physical error prevention. A 3mm gap S is maintained between adjacent nested drill jigs to ensure no interference occurs between them. Figure 2 The "S" in the middle represents the gap between the nested drill jig structures.

[0028] S012, Hole position coordination design; After determining the positioning position of the drill jig, identify the drill jigs that have complex assembly relationships with it and carry out collaborative design; cut off each other according to the nested design in step S011 to ensure that drill jig 1 and drill jig 2 do not interfere with each other.

[0029] Let the minimum allowable wall thickness of the drill jig hole be h, the spacing between the bottom holes of the drill jig hole be D, the radii of the two bottom holes of the drill jig hole be d1 and d2 respectively, the maximum trimmed edge size be G (according to step S011, G≥3mm), and the actual wall thickness after trimming be H. Then H=(D-d1-d2-G) / 2, as follows. Figure 3 As shown.

[0030] When H < h, change the cutting edge position and redesign one of the holes from drill jig 1 to drill jig 2, as shown in the reference. Figure 8 If the hole positions coordinated by drill jig 1 and drill jig 2 cannot meet the requirements, the hole position is deleted and other methods are used to make the hole. This enables a large number of drill jigs to be positioned and made simultaneously for ultra-large wall panels, and allows for timely detection of drill jig misinstallation during positioning.

[0031] S013, Differentiated design of nested structures; Based on step S011, to ensure that drill jigs with similar external structures are not mis-installed, nested structures of different shapes are designed for multiple drill jigs with similar structures that have a coordination relationship with the same drill jig, thus avoiding mis-installation of drill jigs with similar structures; such as Figure 4 Drill jig 1 uses a triangular protrusion nesting, drill jig 2 uses a circular protrusion nesting, and drill jig 3 uses a square protrusion nesting.

[0032] S014, Left and right parts are designed separately; Because the wing has a symmetrical structure, the drill jig is symmetrical on the left and right sides. Based on step S023, in order to distinguish between the left and right parts, the right drill jig adopts a different nesting structure than the left drill jig.

[0033] Reference Figure 1 , Figure 2 For the nested structure design of the drill jig, the shape of the drill jig base is based on the hole-making parts inside the wall panel; Drill jigs with interconnected internal holes form nested drill jig groups. First, determine the basic shape and hole positions of each drill jig base within the group. For areas of mutual interference, determine the cutting edge positions based on the hole positions, cutting away excess material to ensure a 3mm gap between each drill jig and prevent mutual interference, forming a nested structure. Figure 1 The nested drill jig group shown can be expanded outwards according to the connection of the internal drilling components.

[0034] When designing nested drill jig groups, after determining the drill jig hole positions and diameters, adjust the cutting edge dimensions based on the minimum allowable wall thickness of the drill jig holes, and perform coordinated design of the drill jig group component hole positions, referring to... Figure 1 .

[0035] When designing nested drill jig groups, adjust the nesting structure for drill jigs with similar structures, such as... Figure 4 As shown, from left to right, the nested structure of the drill jig is designed as a "ton triangle", a "small pointed corner", a "square corner" and a "right triangle".

[0036] 2. Error-proof signage design; a) Aperture differentiation design; refer to Figure 5 For the connectors between the mounting wall panels and internal parts, there are multiple specifications from K1 to Kn. Each specification of connector requires a different hole diameter, which needs to be made through a drilling jig. When designing drilling jigs for similar structures, the connector specifications are distinguished by different drilling jig hole diameters, and a unified standard template for drilling jig hole diameters is formed. That is, one specification of connector corresponds to one drilling jig hole diameter, ensuring that the drilling jig hole diameter corresponding to each specification is different.

[0037] Let d be the diameter of a certain specification of connector, δd be the hole-making tolerance of different grades, a be the hole diameter in the hole diameter standard sample card, and A be the drill jig hole diameter in the hole diameter standard sample card; if a1-d1≤δd1, then select A1 corresponding to a1 as the drill jig hole diameter when making holes in the corresponding connector.

[0038] b) Color-coded design; refer to Figure 5 For connectors with various specifications from K1 to Kn, when designing similar structure drill jigs, different colors are used to distinguish the connector specifications and form a unified standard color.

[0039] Let A be the required drill jig diameter for a certain specification of connector. Based on the diameter-color standard chart, select the corresponding RGB color C.

[0040] c) Differentiated design of positioning holes; refer to Figure 6 For each drill jig, design at least 2 or 4 positioning holes / tensioning holes, carve 0.5mm grooves at the positioning hole / tensioning hole positions, and spray colored paint inside the grooves to distinguish the drill jig holes on the drill jig.

[0041] d) Design with directional differentiation; refer to Figure 7 For each drill jig, arrow markings in the BL, STA, and WL directions are machined on the drill jig and then painted with colored paint.

[0042] Among them, BL (Buttock Line) is the fuselage longitudinal section line, STA (Station) is the fuselage station line, and WL (Waterline) is the waterline; the three together constitute the core dimension positioning system of aircraft design, each corresponding to the dimension marking requirements in different directions.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use. They are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this invention does not imply that the components are required to be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for designing drilling jigs for large-size composite wall panels, characterized in that, The shape of the drill jig base is based on the hole-making parts inside the wall panel. The drill jig base is designed with trimmed edges and nested according to the surrounding drill jig group to form a nested drill jig group. include: Nested design; nested structures are set between the skeleton drill jigs, and gaps are set between adjacent nested drill jig structures; Hole position coordination design; after determining the positioning position of the drill jig, identify other drill jigs that have an assembly relationship with the drill jig, and design mutual cutting edges at the nesting structure position on the drill jig according to the nesting design structure; Nested structure differentiation design: For multiple similar drill jigs that have a coordination relationship with the same drill jig, nested structures of different shapes are designed for drill jigs with similar structures.

2. The method for designing drilling jigs for large-size composite wall panels according to claim 1, characterized in that, The steps for designing mutually tangent edges at the nested structure positions on the drill jig based on the nested design structure are as follows: Let the minimum allowable wall thickness of the drill jig hole be h, the spacing between the bottom holes of the drill jig hole be D, the radii of the bottom holes of the two drill jig holes be d1 and d2 respectively, the maximum trimmed edge size be G, and the actual wall thickness after trimming be H. Then H = (D - d1 - d2 - G) / 2. When H < h, change the cutting edge position and transfer one of the holes to another drill jig; if the holes coordinated by the two drill jigs at the nested position still cannot meet the minimum wall thickness requirement of the drill jig hole, then delete the hole.

3. The method for designing drilling jigs for large-size composite wall panels according to claim 1, characterized in that, For the design of symmetrical drill jigs, a nested structure with different structures is designed for the left and right drill jigs.

4. The method for designing drilling jigs for large-size composite wall panels according to claim 1, characterized in that, When designing drill jigs with similar structures, different hole diameters are used to distinguish the specifications of the connectors and form a unified standard hole diameter.

5. The method for designing drilling jigs for large-size composite wall panels according to claim 4, characterized in that, Let d be the diameter of a certain specification of connector, δd be the hole-making tolerance of different grades, a be the hole diameter in the hole diameter standard sample card, and A be the drill jig diameter in the hole diameter standard sample card; if a1-d1≤δd1, then select A1 corresponding to a1 as the drill jig diameter when making holes for the connector.

6. The method for designing drilling jigs for large-size composite wall panels according to claim 1, characterized in that, When designing drill jigs with similar structures, different colors are used to distinguish the specifications of the connectors, and a unified standard color is used for identification.

7. The method for designing drilling jigs for large-size composite wall panels according to claim 1, characterized in that, Multiple positioning holes / tensioning holes are designed on the drill jig, and markings are set at the corresponding positions of the positioning holes / tensioning holes.

8. The method for designing drilling jigs for large-size composite wall panels according to claim 1, characterized in that, Arrow markings for machining the BL, STA, and WL directions are set on the drill jig.

Images