A honeycomb sandwich structure damage repair auxiliary positioning and clamping tool

Abstract

The utility model relates to a kind of honeycomb sandwich structure damage repair auxiliary positioning clamping tool, including left support frame, right support frame, upper connection band plate, lower connection band plate, adjustable clamping rod and fixture support leg.The utility model clamping end head is designed as adjustable structure that can match different profile face, can simultaneously realize clamping and exert the pressure of repair site, can provide stable support for repair area.The utility model each part is disassembled, different component assembly can be carried out according to the size of different front and rear edge honeycomb sandwich structure, realize the local clamping of arbitrary profile structure, provide stable operating space for the high-quality repair of structural damage.

Description

Technical Field

[0001] This utility model relates to the field of repair technology for aerospace honeycomb sandwich composite material structures, specifically to an auxiliary positioning and clamping tool for repairing damage to honeycomb sandwich structures. Background Technology The leading and trailing edge structures of modern aircraft wings are typical honeycomb sandwich structures, composed of high-strength composite material panels and high-rigidity honeycomb structures. With increasingly demanding combat requirements, the probability of damage to these honeycomb sandwich structures during training, exercises, and combat missions is gradually increasing. Damage such as perforation, debonding, and delamination in the leading and trailing edge structures directly leads to a decline in aircraft combat performance, weakening its load-bearing capacity, affecting stealth capabilities, and even compromising the safe and reliable operation of the aircraft. Rapid repair of leading and trailing edge structural damage is a necessary part of aircraft maintenance and support, and its repair is of great significance for ensuring the safe and reliable execution of combat missions by combat aircraft.

[0002] Current damage repair methods mostly rely on factory repair, utilizing existing molding or assembly / inspection fixtures for front and rear edge structural damage repair. However, there is a lack of readily available field repair fixtures and methods, impacting repair efficiency. Furthermore, the diverse shapes of the front and rear edge structures make it difficult to integrate repair tools for various structures using a single fixture. Therefore, this paper proposes an auxiliary positioning fixture suitable for temporary field installation of front and rear edge honeycomb sandwich structures for damage repair. Utility Model Content

[0003] The purpose of this invention is to achieve rapid repair of damage to the leading and trailing edge honeycomb sandwich structure of an aircraft, reduce the frequency of reassembly and inspection of the structure, and ensure the stability and installation accuracy of the structure clamping. The purpose of this invention is to design a damage repair auxiliary positioning and clamping tool for emergency repair of the leading and trailing edge honeycomb sandwich structure in both indoor and outdoor fields. This tool can achieve stable clamping of the relevant areas of the structure during repair, thereby improving the repair efficiency of the structure.

[0004] The technical solution of this utility model is: A honeycomb sandwich structure damage repair auxiliary positioning and clamping fixture is provided. This auxiliary positioning and clamping fixture is used to clamp and constrain the front and rear edges of the honeycomb sandwich structure, providing stable support for repair of the damaged location. The auxiliary positioning and clamping fixture includes a left support frame, a right support frame, an upper connecting plate, a lower connecting plate, adjustable clamping rods, and clamping support legs. There are multiple adjustable clamping rods, and each adjustable clamping rod has two nuts threaded into it. The left support frame, right support frame, upper connecting plate, and lower connecting plate are fixedly connected to form an annular frame. The upper connecting plate and lower connecting plate are located at the upper and lower positions of the annular frame, respectively, and the left support frame and right support frame are located at the left and right positions of the annular frame, respectively. The annular frame is used to penetrate the honeycomb sandwich structure. The clamp support leg is fixedly connected to the lower part of the annular frame to provide stable support; The upper connecting plate and the lower connecting plate have the same structure, both having a herringbone-shaped through hole. The adjustable clamping rod passes through the herringbone-shaped through hole and can slide within it. Two nuts on the adjustable clamping rod passing through the herringbone-shaped through hole are located inside and outside the ring frame, respectively. When the adjustable clamping rod slides to any position in the herringbone-shaped through hole, rotating the two nuts can lock the adjustable clamping rod relative to the ring frame. The left and right support frames have multiple through holes, and each through hole is provided with an adjustable clamping rod. All adjustable clamping rods have a clamping end at one end pointing into the annular frame, which is used to abut against the honeycomb sandwich structure to provide clamping support. Two nuts on the adjustable clamping rods passing through the through holes are located inside and outside the annular frame, respectively. Rotating the two nuts can lock the adjustable clamping rod relative to the annular frame. Furthermore, the fishbone-shaped through hole includes a longitudinal through hole and multiple transverse through holes, with the longitudinal through hole communicating with the multiple transverse through holes.

[0005] Furthermore, the through hole is a threaded hole that engages with the corresponding adjustable clamping rod via a thread. The length of the clamping rod is adjusted by the thread.

[0006] Furthermore, the clamping end is disc-shaped or square. Even further, the end face of the clamping end has a matrix arrangement of hexagonal screws, each screw engaging with a threaded hole on the end face. This allows rotation of each screw to adjust its extension and retraction position, adapting to the external shape of the honeycomb sandwich structure. For example, if the honeycomb sandwich structure is the leading and trailing edge structure of an airfoil, this arrangement prevents stress concentration damage to the external surface due to localized contact. The matrix of hexagonal screws can adapt to surfaces with different curvatures.

[0007] Furthermore, the clamp support leg is an adjustable height support leg, the clamp support leg is a sleeve structure, the inner and outer sleeves of the clamp support leg are connected by bolt holes, and the outer sleeve has multiple threaded holes to adapt to different heights.

[0008] The advantages of this utility model are: This utility model features an adjustable clamping end designed to match different surface shapes, enabling simultaneous clamping and pressure application to the repair area, providing stable support. All parts of the tool are detachable, allowing for assembly of different components according to the dimensions of various honeycomb sandwich structures at the front and rear edges. This enables localized clamping of arbitrary surface structures, providing a stable operating space for high-quality repair of structural damage.

[0009] This invention is an auxiliary positioning and clamping fixture for repairing damage to the leading and trailing edge sandwich structure of an airfoil, which is assembled from multiple parts. By assembling parts of different sizes, it can meet the local clamping needs of different external surfaces and leading and trailing edge structures of different sizes. It can be applied to the rapid repair of internal and external field structures, improving repair efficiency and quality. The reassembled structure has a certain degree of versatility and high application benefits. Attached Figure Description

[0010] Figure 1 A schematic diagram of an auxiliary positioning tool for repairing damage to a honeycomb sandwich structure. Figure 2 This is a schematic diagram of the upper and lower connecting plate structure; Figure 3 This is a schematic diagram of the adjustable clamping rod, nut, and clamping end. Figure 4 This is a schematic diagram of the clamping end structure; Figure 5 A schematic diagram of a matrix-type internal hexagonal screw; Figure 6 This is a schematic diagram of the clamp support structure; Among them: 1-left support frame and right support frame, 2-upper connecting plate, lower connecting plate, 3-adjustable clamping rod, 4-clamping end, 5-clamping support leg, 6-wing leading and trailing edge sandwich structure. Detailed Implementation

[0011] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0012] like Figures 1-5 As shown, an auxiliary positioning and clamping fixture for repairing damage to a honeycomb sandwich structure is provided. This auxiliary positioning and clamping fixture is used to clamp and constrain the honeycomb sandwich structure on the leading and trailing edges of an airfoil, providing stable support for repair of the damaged area. The auxiliary positioning and clamping fixture includes a left support frame, a right support frame, an upper connecting plate, a lower connecting plate, adjustable clamping rods, and clamping support legs. There are multiple adjustable clamping rods, and each adjustable clamping rod has two nuts threaded onto it. The left support frame, right support frame, upper connecting plate, and lower connecting plate are fixedly connected to form an annular frame. The upper connecting plate and lower connecting plate are located at the upper and lower positions of the annular frame, respectively, and the left support frame and right support frame are located at the left and right positions of the annular frame, respectively. The annular frame is used to penetrate the honeycomb sandwich structure. The clamp support leg is fixedly connected to the lower part of the annular frame to provide stable support; The upper connecting plate and the lower connecting plate have the same structure, both having a herringbone-shaped through hole. The adjustable clamping rod passes through the herringbone-shaped through hole and can slide within it. Two nuts on the adjustable clamping rod passing through the herringbone-shaped through hole are located inside and outside the ring frame, respectively. When the adjustable clamping rod slides to any position in the herringbone-shaped through hole, rotating the two nuts can lock the adjustable clamping rod relative to the ring frame. The left and right support frames have multiple through holes, and each through hole is provided with an adjustable clamping rod. All adjustable clamping rods have a clamping end at one end pointing into the annular frame, which is used to abut against the honeycomb sandwich structure to provide clamping support. Two nuts on the adjustable clamping rods passing through the through holes are located inside and outside the annular frame, respectively. Rotating the two nuts can lock the adjustable clamping rod relative to the annular frame. The fishbone-shaped through hole includes a longitudinal through hole and multiple transverse through holes, with the longitudinal through hole communicating with the multiple transverse through holes.

[0013] The through hole is a threaded hole that engages with the corresponding adjustable clamping rod via a thread. The length of the clamping rod is adjusted by the thread.

[0014] The clamping end is square. A matrix of hexagonal screws are arranged on the end face of the clamping end, each screw engaging with a threaded hole on the end face. The position of the screws can be adjusted by rotating each screw to fit the outer surface of the honeycomb sandwich structure. For example, if the honeycomb sandwich structure is the leading and trailing edge structure of an airfoil, this arrangement prevents stress concentration damage to the outer surface due to localized contact. The matrix of hexagonal screws can adapt to surfaces with different curvatures.

[0015] The clamp support leg is an adjustable height support leg, and the clamp support leg has a sleeve structure. The inner and outer sleeves of the clamp support leg are connected by bolt holes, and the outer sleeve has multiple threaded holes to adapt to different heights.

[0016] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may describe different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical application of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.

Claims

1. A honeycomb sandwich structure damage repair auxiliary positioning and clamping tool, characterized in that: It includes a left support frame, a right support frame, an upper connecting plate, a lower connecting plate, adjustable clamping rods, and clamping support legs; there are multiple adjustable clamping rods; each adjustable clamping rod has two nuts threaded into it; The left support frame, right support frame, upper connecting plate, and lower connecting plate are fixedly connected to form an annular frame. The upper connecting plate and lower connecting plate are located at the upper and lower positions of the annular frame, respectively, and the left support frame and right support frame are located at the left and right positions of the annular frame, respectively. The annular frame is used to penetrate the honeycomb sandwich structure. The clamp support leg is fixedly connected to the lower part of the annular frame to provide stable support; The upper connecting plate and the lower connecting plate have the same structure, both having a herringbone-shaped through hole. The adjustable clamping rod passes through the herringbone-shaped through hole and can slide within it. Two nuts on the adjustable clamping rod passing through the herringbone-shaped through hole are located inside and outside the ring frame, respectively. When the adjustable clamping rod slides to any position in the herringbone-shaped through hole, rotating the two nuts can lock the adjustable clamping rod relative to the ring frame. The left and right support frames have multiple through holes, and each through hole is provided with an adjustable clamping rod. All adjustable clamping rods have a clamping end at one end pointing into the annular frame, which is used to abut against the honeycomb sandwich structure to provide clamping support. Two nuts on the adjustable clamping rods passing through the through holes are located inside and outside the annular frame, respectively. Rotating the two nuts can lock the adjustable clamping rod relative to the annular frame.

2. The auxiliary positioning and clamping tool for repairing damage of a honeycomb sandwich structure according to claim 1, characterized in that: The fishbone-shaped through hole includes a longitudinal through hole and multiple transverse through holes, with the longitudinal through hole communicating with the multiple transverse through holes.

3. The auxiliary positioning and clamping tool for repairing damage of a honeycomb sandwich structure according to claim 1, characterized in that: The through hole is a threaded hole that engages with the corresponding adjustable clamping rod; the length of the clamping rod is adjusted by the thread.

4. The auxiliary positioning and clamping tool for repairing damage of a honeycomb sandwich structure according to claim 1, characterized in that: The clamping end is disc-shaped or square.

5. The auxiliary positioning and clamping tool for repairing damage of a honeycomb sandwich structure according to claim 4, characterized in that: The clamping end face has hexagonal screws arranged in a matrix. Each screw mates with a screw hole on the end face, and the position of the screw extension and retraction can be adjusted by rotating each screw to adapt to the outer surface of the honeycomb sandwich structure.

6. The auxiliary positioning and clamping tool for repairing damage of a honeycomb sandwich structure according to claim 1, characterized in that: The clamp support leg is an adjustable height support leg, and the clamp support leg has a sleeve structure. The inner and outer sleeves of the clamp support leg are connected by bolt holes, and the outer sleeve has multiple threaded holes to adapt to different heights.

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