A device for secondary pilot hole of aircraft assembly access cover

Abstract

The utility model provides a device for aircraft assembly port cover secondary lead -hole, including reamer, connecting plate, tray nut, guide sleeve and port cover, the reamer working end top is provided with guide rod, the connecting plate is installed in port cover bottom, the connecting plate central arrangement has hole, tray nut is installed in connecting plate bottom, and with the hole on connecting plate corresponds, guide sleeve is in the middle and passes through the thread is installed in tray nut, with the guide rod on reamer is matched. The cooperation clearance of guide rod and guide sleeve is 0.01-0.03mm, the connecting plate is fixedly connected with port cover bottom through at least two countersunk head bolt, guide sleeve adopts brass to make, its inner wall is provided with lubricating coating. The length of guide rod is greater than the axial length of guide sleeve, and the difference value is 5-10mm, the utility model discloses simple structure, convenient to use, under the precondition of guaranteeing tray nut hole and the hole coaxial degree on port cover, fast drilling reduces production cycle.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft assembly technology, specifically relating to a device for secondary drilling holes in aircraft assembly covers. Background Technology

[0002] During aircraft assembly, narrow spaces and enclosed areas are easily formed, making it impossible to pass through the cover from the side of the tray nut. The traditional method of drilling and enlarging holes involves using a self-made reverse drilling template to reverse the tray nut hole onto the cover to create the initial hole, and then enlarging the initial hole to create the final hole. Since the hole position during reverse drilling depends on the quality of the self-made reverse drilling template and the usage error of the template, this method is prone to causing the final hole to be misaligned with the tray nut hole, resulting in out-of-tolerance hole position. In addition, the correctness of the hole position after drilling needs to be repeatedly confirmed during the reverse drilling process, which affects the production cycle. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a device that can rapidly form holes and reduce the production cycle while ensuring the coaxiality of the enlarged holes.

[0004] The objective of this utility model is achieved through the following technical solution: A device for secondary drilling of an aircraft assembly cover includes a reamer, a connecting plate, a tray nut, a guide sleeve, and the cover. A guide rod is provided at the top of the working end of the reamer. The connecting plate is installed at the bottom of the cover. A hole is provided in the center of the connecting plate. The tray nut is installed at the bottom of the connecting plate and corresponds to the hole on the connecting plate. The guide sleeve is a through-cylinder shape, threaded into the tray nut, and matches the guide rod on the reamer. The clearance between the guide rod and the guide sleeve is 0.01-0.03 mm. The connecting plate is fixedly connected to the bottom of the cover by at least two countersunk bolts. The guide sleeve is made of brass, and its inner wall is coated with a lubricating coating. The length of the guide rod is greater than the axial length of the guide sleeve, with a difference of 5-10 mm.

[0005] The beneficial effects of this utility model are: This utility model has a simple structure and is easy to use. It can quickly make holes and reduce the production cycle while ensuring the coaxiality of the hole in the support plate nut and the hole on the cover. Attached Figure Description

[0006] The present invention will now be described in further detail with reference to the accompanying drawings.

[0007] Figure 1 This is a structural diagram of the present invention.

[0008] Figure 2 This is a partial sectional view of the present invention.

[0009] As shown in the figure: 1-Reamer; 11-Guide rod; 2-Connecting plate; 3-Pallet nut; 31-Guide sleeve; 4-Cover. Detailed Implementation

[0010] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0011] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0012] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0013] like Figure 1 , Figure 2 As shown, a device for secondary drilling of an aircraft assembly cover includes a reamer 1, a guide rod 11, a connecting plate 2, a tray nut 3, a guide sleeve 31, and a cover 4.

[0014] The reamer 1 has a conventional blade. A guide rod 11 is provided at the top of the working end of the reamer 1. The reamer 1 and the guide rod 11 are coaxially arranged. The length of the guide rod 11 is greater than the axial length of the guide sleeve 31, and the difference is 5-10mm. The fit clearance between the guide rod 11 and the guide sleeve 31 is 0.01-0.03mm.

[0015] The connecting plate 2 is installed at the bottom of the cover 4; the connecting plate 2 has a hole in the center; the connecting plate 2 is fixedly connected to the bottom of the cover 4 by at least two countersunk bolts.

[0016] The tray nut 3 is a conventional tray nut with internal threads. The tray nut 3 is installed at the bottom of the connecting plate 2, and the hole in the middle of the tray nut 3 corresponds to the hole on the connecting plate 2, and they are coaxially arranged.

[0017] The guide sleeve 31 is a through cylindrical shape, which is threaded into the tray nut 3 and matches the guide rod 11 on the reamer 1; the guide sleeve 31 is made of brass and its inner wall is provided with a lubricating coating. The length of the guide rod 11 is greater than the axial length of the guide sleeve 31, and the difference is 5-10mm.

[0018] The working steps of this utility model are as follows: When the cover 4 has a quality problem and needs to be replaced, a new hole needs to be drilled. However, the hole and the hole on the connecting plate 2 have a coaxiality requirement. After connecting the cover 4 to the connecting plate 2, the hole is first pre-drilled by entering through the side of the tray nut 3. After pre-drilling, the reamer 1 is entered from the side of the cover 4. The guide rod 11 on the reamer 1 cooperates with the guide sleeve 31 to ensure the accuracy of the reamer 1 in enlarging the hole and to ensure the coaxiality of the hole between the cover 4 and the connecting plate 2.

[0019] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A device for secondary pilot holes in aircraft assembly covers, characterized in that: It includes a reamer (1), a connecting plate (2), a tray nut (3), a guide sleeve (31), and a cover (4); the top of the working end of the reamer (1) is provided with a guide rod (11); the connecting plate (2) is installed at the bottom of the cover (4); the connecting plate (2) has a hole in the center; the tray nut (3) is installed at the bottom of the connecting plate (2) and corresponds to the hole on the connecting plate (2); the guide sleeve (31) is a through cylindrical shape, which is installed in the tray nut (3) by thread and matches the guide rod (11) on the reamer (1).

2. The device for secondary pilot holes for aircraft assembly covers according to claim 1, characterized in that: The reamer (1) and the guide rod (11) are coaxially arranged.

3. The device for secondary pilot holes for aircraft assembly covers according to claim 1, characterized in that: The clearance between the guide rod (11) and the guide sleeve (31) is 0.01-0.03 mm.

4. The device for secondary pilot holes for aircraft assembly covers according to claim 1, characterized in that: The connecting plate (2) is fixedly connected to the bottom of the cover (4) by at least two countersunk bolts.

5. The device for secondary pilot holes for aircraft assembly covers according to claim 1, characterized in that: The guide sleeve (31) is made of brass and has a lubricating coating on its inner wall.

6. The device for secondary pilot holes for aircraft assembly covers according to claim 1, characterized in that: The length of the guide rod (11) is greater than the axial length of the guide sleeve (31), and the difference is 5-10 mm.

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