Composite repair device

Abstract

The utility model belongs to the field of composite material maintenance discloses a kind of composite material maintenance device, including patch, connecting sleeve and locking piece.Patch is used to repair the opening on the inner side skin of composite material.Connecting sleeve is detachably connected with patch.Locking piece is adjustably arranged in connecting sleeve, and the side of locking piece facing patch is used to abut with the outer side skin of composite material.The composite material maintenance device provided by the utility model can adjust the position of locking piece in the axial direction of connecting sleeve after patch is inserted into the opening of the inner side skin of composite material, so that locking piece can be attached to the outer side skin of composite material and abut, and patch can be attached to the inner side skin of composite material, to ensure the attachment force between patch and inner side skin during curing, and to ensure the repair quality of composite material.

Description

Technical Field

[0001] This utility model relates to the field of composite material repair, and in particular to a composite material repair device. Background Technology

[0002] Composite materials, with their superior lightweight advantages, are widely used in the aerospace field as various structural components. With the widespread application of composite materials, the need for their repair has also increased, especially the repair of sandwich panels in aircraft.

[0003] Due to the structural limitation that composite sandwich panels cannot be disassembled from the original structure, repairs can only be carried out from one side. This can easily lead to the repair patch not being able to fit well with the inner skin, resulting in gaps between the patch and the inner skin during the curing process and thus poor repair quality.

[0004] To address this issue, two common composite material repair devices are employed: 1. A spring steel strip, in conjunction with temporary fasteners, uses its elastic force to press the patch tightly against the inner skin after bending and returning to its original position. 2. A connecting wire, in conjunction with a bridge rod, provides the bonding force between the patch and the inner skin. However, neither of these methods effectively controls the bonding force between the patch and the inner skin, making it easy for operators to make mistakes during operation, potentially damaging the sandwich panel or causing the patch to detach.

[0005] Therefore, there is an urgent need for a composite material repair device to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a composite material repair device to solve the problem that the control of the adhesion force between the patch and the inner skin in the existing composite material repair devices is not good, and the operator is very likely to make mistakes during the operation, resulting in damage to the sandwich panel or patch falling off.

[0007] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0008] A composite material repair device includes: a patch, a connecting sleeve, and a locking element; the patch is used to repair an opening on the inner skin of the composite material; the connecting sleeve is detachably connected to the patch; the locking element is adjustablely disposed on the connecting sleeve, and the side of the locking element facing the patch is used to abut against the outer skin of the composite material.

[0009] Optionally, it also includes a connector, which includes a first segment and a second segment. The diameter of the first segment is smaller than the diameter of the second segment. The first segment is provided with an external thread, and the patch is provided with a threaded hole. The first segment of the connector is threadedly connected to the threaded hole.

[0010] Optionally, it also includes an extension sleeve, which is detachably connected to the end of the connecting sleeve away from the patch.

[0011] Optionally, the axial length of the extension sleeve is greater than the axial length of the connecting sleeve.

[0012] Optionally, the extension sleeve is provided with threads on both the inner and outer sides, the connecting sleeve is provided with an external thread at the end away from the patch, the extension sleeve is threadedly connected to the connecting sleeve, and the locking member is threadedly sleeved on the extension sleeve.

[0013] Optionally, the locking member is provided with a handle, the extension direction of which is perpendicular to the extension sleeve.

[0014] Optionally, it also includes a pad, one side of which abuts against the locking member and the other side of which abuts against the outer skin of the composite material.

[0015] Optionally, the pad is provided with an anti-slip structure on the side surface that abuts against the outer skin of the composite material.

[0016] Optionally, the patch is elliptical, and the smaller diameter of the patch is smaller than the diameter of the opening.

[0017] Optionally, an adhesive is provided on the side of the patch facing the connecting sleeve.

[0018] The beneficial effects of this utility model are:

[0019] The composite material repair device proposed in this utility model, by setting a connecting sleeve and a locking member, can adjust the position of the locking member in the axial direction of the connecting sleeve after the patch is inserted into the opening of the inner skin of the composite material. This allows the locking member to fit and abut against the outer skin of the composite material, ensuring that the patch is tightly attached to the inner skin of the composite material. This guarantees the adhesion between the patch and the inner skin during the curing process, thereby ensuring the repair quality of the composite material. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional view of the composite material repair device provided in this embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the connecting sleeve, the extension sleeve, and the locking member when they are in cooperation, according to an embodiment of this utility model.

[0023] Figure 3 yes Figure 2 Sectional view at point AA along the middle;

[0024] Figure 4 This is a schematic diagram of the opening of the inner skin of the patch-bonded composite material provided in this embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the patch provided in this embodiment of the present invention passing through the opening of the inner skin of the composite material.

[0026] In the picture:

[0027] 1. Patch; 2. Connecting sleeve; 21. Connecting hole; 3. Locking element; 4. Connecting element; 41. First section; 42. Second section; 5. Extension sleeve; 6. Pad; 7. Outer skin; 71. Repair hole; 8. Inner skin; 81. Opening; 9. Core. Detailed Implementation

[0028] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] This embodiment discloses a composite material repair device, including a patch 1, a connecting sleeve 2, and a locking member 3. The patch 1 is used to repair the opening 81 on the inner skin 8 of the composite material. The connecting sleeve 2 is detachably connected to the patch 1. The locking member 3 is adjustablely disposed on the connecting sleeve 2, and the side of the locking member 3 facing the patch 1 is used to abut against the outer skin 7 of the composite material.

[0032] It is understood that the composite material repair device proposed in this embodiment, by setting the connecting sleeve 2 and the locking member 3, can, after the patch 1 extends into the opening 81 of the inner skin 8 of the composite material, adjust the position of the locking member 3 in the axial direction of the connecting sleeve 2, so that the locking member 3 can fit and abut against the outer skin 7 of the composite material, while the patch 1 is tightly fitted to the inner skin 8 of the composite material. This ensures the adhesion between the patch 1 and the inner skin 8 during the curing process, thereby ensuring the repair quality of the composite material. Moreover, by adjusting the position of the locking member 3 in the axial direction of the connecting sleeve 2, the adhesion between the patch 1 and the inner skin 8 of the composite material can be adjusted, ensuring that the operator will not cause the patch 1 to fall off or damage the composite material due to operational errors.

[0033] Furthermore, in some embodiments, the composite material repair device further includes a connector 4, which includes a first segment 41 and a second segment 42. The diameter of the first segment 41 is smaller than the diameter of the second segment 42. The first segment 41 is provided with external threads, and the patch 1 has a threaded hole. The first segment 41 of the connector 4 is threadedly connected to the threaded hole. More specifically, as shown in the figure, in this embodiment, the end of the connecting sleeve 2 away from the patch 1 is provided with an opening 81 to accommodate the connector 4. The end of the connecting sleeve 2 near the patch 1 has a connecting hole 21 with a diameter of 3mm. The inner diameter of the threaded hole on the patch 1 is also 3mm. The first segment 41 of the connector 4 has a diameter of 3mm. The first end of the connector 4 passes through the connecting hole 21 and is threadedly connected to the threaded hole of the patch 1. The end face of the second segment 42 of the connector 4 near the first segment 41 can abut against the inner bottom wall of the connecting sleeve 2, ensuring a stable connection between the connecting sleeve 2 and the patch 1.

[0034] Furthermore, in some embodiments, the composite material repair device further includes an extension sleeve 5, which is detachably connected to the end of the connecting sleeve 2 away from the patch 1. It is understood that the extension sleeve 5 and the connecting sleeve 2 are coaxially arranged. By providing the extension sleeve 5, when the composite material is thick, the operating end of the connecting sleeve 2 can be extended beyond the outer skin 7 of the composite material. This allows workers to adjust the relative position between the patch 1 and the opening 81 on the inner skin 8 of the composite material using the extension sleeve 5, ensuring that the patch 1 and the opening 81 on the inner skin 8 correspond in position, thus achieving proper repair of the opening 81 by the patch 1.

[0035] Furthermore, in some embodiments, as shown in the figure, the axial length of the extension sleeve 5 is greater than the axial length of the connecting sleeve 2. It is understood that the size of the extension sleeve 5 can be selected according to the composite material to be repaired. To facilitate the adjustment of the position of the patch 1 by the workers and to improve the applicability of the composite material repair device, the axial length of the extension sleeve 5 is greater than the axial length of the connecting sleeve 2.

[0036] For example, the extension sleeve 5 has threads on both its inner and outer sides, and the connecting sleeve 2 has an external thread at its end away from the patch 1. The extension sleeve 5 is threadedly connected to the connecting sleeve 2, and the locking member 3 is threadedly fitted onto the extension sleeve 5. It can be understood that the extension sleeve 5 is threaded onto the outside of the connecting sleeve 2 and rotates to connect with the unthreaded and externally threaded portion of the connecting sleeve 2 to fix the extension sleeve 5 to the connecting sleeve 2. The locking member 3 is threadedly connected to the outside of the extension sleeve 5 and can move axially along the extension sleeve 5 by rotation, thereby adjusting the distance between it and the patch 1, and adjusting the adhesion force between the patch 1 and the inner skin 8.

[0037] Furthermore, in some embodiments, the locking member 3 is provided with a handle, the extension direction of which is perpendicular to the extension sleeve 5. It is understood that by providing a handle, the lever arm can be increased, enabling the application of large tightening or loosening torque with less effort, facilitating operation by the worker, thereby achieving rapid adjustment of the locking member 3 and greatly improving the efficiency of adjusting the adhesion between the patch 1 and the inner skin 8. More specifically, in this embodiment, multiple handles are evenly arranged along the circumference of the locking member 3. This arrangement further facilitates the worker in adjusting the position of the locking member 3 on the extension sleeve 5.

[0038] Furthermore, in some embodiments, since it is necessary to tilt the patch 1 to facilitate its passage through the opening 81 of the inner skin 8 of the composite material, the outer skin 7 of the composite material and the composite material repair device also include a pad 6. One side of the pad 6 abuts against the locking member 3, and the other side abuts against the outer skin 7 of the composite material. It is understood that by providing the pad 6, the locking member 3 abuts against the outer skin 7 of the composite material through the pad 6, which increases the contact area between the locking member 3 and the outer skin 7 of the composite material, disperses the compressive stress between the locking member 3 and the outer skin 7 of the composite material, ensures that the outer skin 7 of the composite material is not damaged by the locking member 3, and at the same time enables the locking member 3 to provide a uniform clamping force.

[0039] Furthermore, to better ensure the adhesion between the pad 6 and the outer skin 7 of the composite material, in some embodiments, an anti-slip structure is provided on the surface of the pad 6 that abuts against the outer skin 7 of the composite material. Specifically, in this embodiment, the anti-slip structure is a rubber strip. It can be understood that by providing an anti-slip structure, the relaxation effect of the pad 6 can be improved, thereby ensuring that the locking member 3 provides a stable adhesion force to the patch 1, and thus improving the adhesion between the patch 1 and the inner skin 8 of the composite material.

[0040] Furthermore, in some embodiments, the patch 1 is elliptical, and the smaller diameter of the patch 1 is smaller than the diameter of the opening 81. It is understood that the opening 81 on the inner skin 8 must at least ensure that the smaller diameter of the patch 1 can pass through it. This arrangement ensures that the patch 1 can smoothly pass through the opening 81 of the inner skin 8 of the composite material, thereby achieving a fit with the inner skin 8. Exemplarily, the opening 81 of the inner skin 8 of the composite material is also elliptical. If the opening 81 of the inner skin 8 is irregular, it is modified into an elliptical shape. This arrangement makes the fit between the patch 1 and the opening 81 of the inner skin 8 more uniform, thereby ensuring the repair quality of the opening 81 of the inner skin 8.

[0041] Optionally, in some embodiments, to further improve the adhesion between the patch 1 and the inner skin 8 of the composite material, and to prevent the patch 1 from detaching from the inner skin 8 of the composite material due to insufficient adhesion, an adhesive is provided on the side of the patch 1 facing the connecting sleeve 2. It is understood that the adhesive can cooperate with the patch 1 to improve the adhesion of the patch 1, ensuring that the patch 1 will not detach from the inner skin 8 of the composite material after curing, thus guaranteeing the repair quality.

[0042] Referring to the figures, the repair process of the composite material repair device provided in this embodiment of the invention for damaged composite materials is roughly as follows:

[0043] While removing any remaining damage to the outer skin 7 and core 9 of the composite material, a repair hole 71 larger than the opening 81 of the inner skin 8 of the composite material is drilled. The repair hole 71 facilitates the placement of the patch 1 and the subsequent installation of the connecting sleeve 2 and the extension sleeve 5. For example, the size of the repair hole 71 on the outer skin 7 and core 9 of the composite material is D.

[0044] The opening 81 of the inner skin 8 of the composite material is shaped into an ellipse. For example, the major diameter of the opening 81 of the inner skin 8 of the composite material is d.

[0045] Based on the shaped opening 81, a patch 1 of suitable size is made, and a threaded hole with the same size as the connector 4 is opened on the patch 1.

[0046] Connect patch 1, connector 4, connecting sleeve 2 and extension sleeve 5, and apply adhesive to patch 1.

[0047] The patch 1 is passed through the opening 81 of the inner skin 8 of the composite material and rotated to completely cover the opening 81 of the inner skin 8 of the composite material.

[0048] Place the pad 6 on the outer skin 7 of the composite material and rotate the locking member 3 to make the patch 1 fit the inner skin 8 of the composite material, and then wait for curing.

[0049] After curing, remove connector 4, extension sleeve 5, pad 6 and locking component 3.

[0050] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite material repair device, characterized in that, include: The patch (1), the connecting sleeve (2), and the locking element (3) are used to repair the opening (81) on the inner skin (8) of the composite material. The connecting sleeve (2) is detachably connected to the patch (1). The locking element (3) is adjustablely positioned on the connecting sleeve (2), and the side of the locking element (3) facing the patch (1) is used to abut against the outer skin (7) of the composite material.

2. The composite material repair device according to claim 1, characterized in that, It also includes a connector (4), which includes a first segment (41) and a second segment (42). The diameter of the first segment (41) is smaller than the diameter of the second segment (42). The first segment (41) is provided with an external thread, and the patch (1) is provided with a threaded hole. The first segment (41) of the connector (4) is threadedly connected to the threaded hole.

3. The composite material repair device according to claim 1, characterized in that, It also includes an extension sleeve (5), which is detachably connected to the end of the connecting sleeve (2) away from the patch (1).

4. The composite material repair device according to claim 3, characterized in that, The axial length of the extension sleeve (5) is greater than the axial length of the connecting sleeve (2).

5. The composite material repair device according to claim 3, characterized in that, The extension sleeve (5) is provided with threads on both the inner and outer sides. The end of the connecting sleeve (2) away from the patch (1) is provided with an external thread. The extension sleeve (5) is threadedly connected to the connecting sleeve (2). The locking member (3) is threadedly fitted onto the extension sleeve (5).

6. The composite material repair device according to claim 5, characterized in that, The locking member (3) is provided with a handle, and the extension direction of the handle is perpendicular to the extension sleeve (5).

7. The composite material repair device according to claim 1, characterized in that, It also includes a pad (6), one side of which abuts against the locking member (3) and the other side abuts against the outer skin (7) of the composite material.

8. The composite material repair device according to claim 7, characterized in that, The pad (6) has an anti-slip structure on the side surface that abuts against the outer skin (7) of the composite material.

9. The composite material repair device according to any one of claims 1-8, characterized in that, The patch (1) is elliptical, and the smaller diameter of the patch (1) is smaller than the diameter of the opening (81).

10. The composite material repair device according to any one of claims 1-8, characterized in that, The patch (1) is provided with adhesive on the side facing the connecting sleeve (2).

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