Composite fairing boss molded surface detection device

Abstract

The utility model belongs to the technical field of aircraft assembly, and relates to a detection device for a boss profile of a composite fairing. Comprising a detection flat plate, angle seats and insertion sheets. The detection flat plate is in a long strip shape, angle seats are arranged on the two sides of the detection flat plate respectively, the angle seats are fixedly connected with the detection flat plate through quick-release bolts and handle nuts, and each angle seat comprises a bottom plate and a vertical plate. The bottom plate and the vertical plate are welded into a whole, a theoretical gap is formed between the profile of the vertical plate and the profile of the boss of the fairing, the fairing is placed between the two angle seats during measurement, and the theoretical gap is compensated and detected by placing the insertion piece. Bolts and nuts are all quickly disassembled, can be quickly disassembled and assembled and are convenient to operate, so that the operation time is saved, and the problem of high labor intensity of operators is solved; as the device is not influenced by geographical factors outside the rack, the device is simple in structure and convenient to operate, the design and use requirements are met, and the assembly efficiency and quality of composite products are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the process equipment of aircraft assembly, concretely relates to a kind of composite fairing boss profile detection device. BACKGROUND

[0002] There are a large number of composite fairing structure products in the existing aircraft assembly in China, which are mostly glass fiber reinforced plastic, i.e. fiber reinforced plastic. Generally, it refers to the reinforced plastic using glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin matrix, with glass fiber or its product as reinforcing material, which is called glass fiber reinforced plastic or glass steel. It has the advantages of light weight, high strength, non-conductivity, corrosion resistance, high mechanical strength, good thermal performance, good designability and excellent processability, but also has the disadvantages of low elastic modulus, poor long-term temperature resistance, aging phenomenon and low shear strength.

[0003] The fairing is a streamlined component on the aircraft that covers the external protrusions or discontinuous structures to reduce air resistance. The fairing of the aircraft is used to adjust the airflow, and in order to reduce the resistance of the aircraft in the air, the fairing is designed in a streamlined manner to make the airflow smooth. The fairing is also used to protect the core components such as the engine and the nacelle. Therefore, the application value of the fairing on the aircraft is very critical and important.

[0004] Since the glass fiber reinforced plastic fairing is a non-metallic material, its shape feature is that the bottom size is larger, the top end is narrow and small, and the inside is a thin-walled cavity structure that is enclosed around. Therefore, the fairing has a large curvature change. Because of the characteristics of glass fiber reinforced plastic, the composite fairing and the boss on the fairing are easily deformed, which leads to a complicated process, assembly trouble and uncertain actual deviation.

[0005] In actual production and assembly, the fairing boss profile size in the spanwise position may have deviation. The installation of the theoretically designed device may have problems, which requires disassembly, rework or change of the theoretically designed size, etc., which increases many steps and processes and wastes a lot of time and economic cost. INVENTION CONTENTS

[0006] TECHNICAL PROBLEM SOLVED

[0007] The utility model overcomes the size deviation caused by the deformation of the composite fairing product in the prior art and the size deviation in the actual production and assembly of the composite fairing product, which leads to the inability to assemble the product. It provides a composite fairing boss profile detection device before assembly.

[0008] In order to solve the above technical problems, the utility model is through the following technical solutions realizes: this device has the complex material fairing boss profile detection function. Before the complex material fairing assembly, use the device to detect the profile size of fairing boss, if do not satisfy the assembly requirement, can immediately repair, has saved the cost and time of manufacturing and production assembly. Still can use this device to detect whether the complex material fairing boss profile development direction interval size satisfies the design requirement after the complex material fairing manufacturing is completed, has guaranteed the manufacturing precision of complex material fairing.

[0009] Technical scheme

[0010] The utility model provides a kind of complex material fairing boss profile detection device, it is characterized in that, including detection flat plate (1), angle seat (4), insert piece (7);The detection flat plate (1) is long strip, and angle seat (4) is respectively arranged on two sides, and the angle seat (4) is connected and fixed with detection flat plate (1) by quick-release bolt (5) and handle nut (6), and angle seat (4) includes bottom plate (8), stand (9);The bottom plate (8) is welded as a whole with stand (9), and there is theoretical gap between the profile of stand (9) and fairing boss profile, when measuring, fairing is placed between two angle seats (4), and the theoretical gap is compensated and detected by placing insert piece 7.

[0011] Further, the detection flat plate (1) is a metal piece, preferably an aluminum plate. The aluminum plate is easy to process, has low density, high strength, and good corrosion resistance

[0012] Further, the detection flat plate (1) has angle seat (4) on both sides, and the profile of the stand (9) on the angle seat (4) is set according to the fairing boss profile. The fairing is placed between the angle seats (4), and the angle seats (4) with exclusive profiles are provided for different models of fairing to meet the use requirements.

[0013] Further, it further includes a reinforcing rib (10), which is arranged on the angle seat (4) and welded with the bottom plate (8) and the stand (9) as a whole. (Ensure that the angle seat (4) is firm and stable)

[0014] Further, the thickness of the insert piece (7) is the theoretical gap. (In addition to setting the thickness of the theoretical gap, a set of insert pieces 7 with different specifications such as ±0.5, ±1, etc. are provided to meet the use requirements of the detection gap size)

[0015] Further, the detection flat plate (1) is provided with multiple sets of symmetrical angle seats (4) to realize the detection of the boss profile of different models of fairing. (Meet the use requirements of different models of fairing boss profile)

[0016] Furthermore, the detection plate (1) is also engraved with the aircraft's central symmetry line and heading. (Note: Operators should place this device in the correct position to ensure proper use.)

[0017] Technical effect

[0018] Compared with existing technologies, the beneficial effects of this utility model are as follows: The composite fairing profile inspection device ensures that the spanwise dimensions of the composite fairing bosses meet assembly and manufacturing requirements, avoiding the problems of long assembly times, high difficulty, high maintenance costs, and high labor intensity caused by disassembly and rework of the composite fairing after assembly if it does not meet design requirements. This significantly improves assembly efficiency and ensures the product assembly meets design requirements. All bolts and nuts are quick-release type, allowing for rapid disassembly and assembly, facilitating operation, saving operation time, and solving the problem of high labor intensity for operators. Because it operates outside the frame and is unaffected by geographical factors, has a simple structure, and is easy to operate, it meets design and usage requirements, improving the efficiency and quality of composite product assembly. It provides a new approach and method for composite product profile inspection, possessing certain promotional significance and value. Attached Figure Description

[0019] This utility model includes 5 accompanying drawings, and the drawings and their descriptions are as follows:

[0020] Figure 1 This utility model relates to a composite fairing profile inspection fixture.

[0021] Figure 2 This is an exploded view of the composite fairing profile inspection fixture of this utility model;

[0022] Figure 3 For testing the corner bracket;

[0023] Figure 4 Composite fairing products;

[0024] Figure 5 This is a schematic diagram showing the relative installation positions of the composite fairing profile inspection fixture and the composite fairing during use.

[0025] Among them, 1-inspection plate, 2-quick release bolt, 3-knurled nut, 4-corner seat, 5-quick release bolt, 6-handle nut, 7-insert plate, 8-base plate, 9-vertical plate, 10-reinforcing rib. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 , 2 The present invention will be further described in detail below with reference to sections 3, 4, and 5, and specific embodiments:

[0027] First, the detection plate 1 is connected and fixed on the standard plate of the required corresponding machine type through the two reference holes. The two reference holes and four connecting holes on the detection plate 1 are pressed into the fixed bushings during manufacturing. Then, the four positioning holes on the detection plate 1 are poured into bushings according to the required hole position on the standard plate, and the quick-release bolt 2 and knurled nut 3 are inserted to fix the fixed bushings of the four positioning holes on the detection plate 1. After the epoxy resin is cured, the detection plate 1, quick-release bolt 2 and knurled nut 3 are removed from the standard plate. Then, the detection plate 1 is connected with the composite fairing product through the quick-release bolt 2 and knurled nut 3, and the detection plate 1 and the composite fairing product are placed flat on the workbench or operating table, such as Figure 5 .

[0028] The detection angle seat 4 is connected with the detection plate 1 through the quick-release bolt 5 and handle nut 6. After the detection angle seat 4 is installed and fixed on the detection plate 1, different specifications and numbers of inserts 7 are inserted between the detection angle seat 4 and the theoretical reserved gap of the convex surface of the composite fairing product according to the actual gap size. The distance size between the detection angle seat 4 and the convex surface of the composite fairing product is determined by the number and thickness size of the inserts 7. If the actual distance size between the two is inconsistent with the theoretical gap size, the convex surface shape of the composite fairing product is deviated from the theoretical shape during product design.

[0029] At this time, the composite fairing product can be repaired in time to meet the assembly requirements of the composite fairing product, and then the product assembly is performed. The situation that the size of the composite fairing product is deviated and cannot be assembled during the assembly process will not occur. Due to the easy size deviation of the composite fairing product, the composite fairing convex surface detection fixture can timely detect whether the composite fairing product has size deviation. The production efficiency is greatly improved.

[0030] In actual production, when other similar composite cover convex surface size detection is required, the size and outer shape of the detection plate 1, the size and outer shape of the detection angle seat 4, the number, thickness, outer shape and size of the inserts 7 can be adjusted and changed according to the actual situation of the composite cover product to complete the operation and installation.

[0031] A composite fairing convex surface detection device, characterized in that it comprises a detection plate assembly, a detection angle seat assembly and inserts 7.

[0032] The detection plate assembly is composed of a detection flat plate 1, quick-release bolts 2, knurled nuts 3. The detection flat plate 1 has 10 holes and 10 fixed bushings, including 2 reference holes, 4 positioning holes and 4 connecting holes. The detection flat plate 1 is also engraved with the center symmetry line and the heading of the aircraft. The 2 reference holes and 4 connecting holes are pressed into the fixed bushings when the detection flat plate 1 is manufactured, and the fixed bushings are in interference fit with the detection flat plate 1. The 4 positioning holes are not pressed into the bushings when the detection flat plate 1 is manufactured, and the fixed bushings need to be cast in the 4 positioning holes after the standard flat plate of the corresponding aircraft model is connected through the 2 reference holes. The quick-release bolts 2 and the knurled nuts 3 are connected with the fairing frame plane through the 4 positioning holes of the detection flat plate 1.

[0033] The detection angle seat assembly is composed of a detection angle seat 4, quick-release bolts 5, handle nuts 6. The detection angle seat 4 is composed of a bottom plate 8, a vertical plate 9 and a reinforcing rib 10. The bottom plate 8 has 2 round holes, and the quick-release bolts 5 and the handle nuts 6 are connected with the detection flat plate 1. The vertical plate 9 has a theoretical gap size with the convex surface of the composite fairing, and the insert piece 7 is inserted between the two to determine whether the convex surface of the composite fairing is deviated. The bottom plate 8 and the vertical plate 9 are provided with the reinforcing rib 10, which is triangular.

[0034] The insert piece 7 has a long round hole for convenient operation. The detection angle seat 4 and the convex surface of the composite fairing have a reserved theoretical gap size, and the insert piece 7 is located between the detection angle seat 4 and the convex surface of the composite fairing for detecting the deviation size. A set of insert pieces 7 are provided according to the specifications of the theoretical gap size, the theoretical gap size ± 0.5, the theoretical gap size ± 1, etc. to meet the use requirements of the detection gap size.

Claims

1. A composite fairing boss profile detection device, characterized in that, The test plate (1) includes a test plate (1), corner brackets (4), and inserts (7). The test plate (1) is long and narrow, with corner brackets (4) on both sides. The corner brackets (4) are connected and fixed to the test plate (1) by quick-release bolts (5) and handle nuts (6). The corner brackets (4) include a base plate (8) and a vertical plate (9). The base plate (8) and the vertical plate (9) are welded together. There is a theoretical gap between the surface of the vertical plate (9) and the surface of the fairing boss. During measurement, the fairing is placed between the two corner brackets (4). The theoretical gap is compensated and detected by placing inserts (7).

2. The composite fairing boss profile detection device according to claim 1, characterized in that, The detection plate (1) is a metal part.

3. The composite fairing boss profile detection device according to claim 2, characterized in that, The detection plate (1) is provided with corner seats (4) on both sides, and the profile of the upright plate (9) on the corner seat (4) is set according to the profile of the fairing boss.

4. The composite fairing boss profile detection device according to claim 3, characterized in that, It also includes reinforcing ribs (10), which are set on the corner base (4) and welded together with the base plate (8) and the upright plate (9).

5. The composite fairing boss profile detection device according to claim 4, characterized in that, The thickness of the insert (7) is the theoretical gap.

6. The composite fairing boss profile detection device according to claim 5, characterized in that, The detection plate (1) is equipped with multiple sets of symmetrical corner seats (4) to realize the detection of the protrusion surface of different models of fairings.

7. The composite fairing boss profile detection device according to claim 6, characterized in that, The detection plate (1) is engraved with the aircraft's central symmetry line and heading.

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