Dimple device suitable for curvature molded surface

Abstract

The utility model relates to a dimpling device suitable for a curvature molded surface. The dimpling device comprises a connecting rod, a shell, a small spring, an external thread, a supporting rod, a cutter clamping device and a locking sleeve, each blind hole is internally provided with one small spring, a supporting rod is inserted into each blind hole, and the small springs provide elastic thrust for the supporting rods; the front end of the shell is provided with an external thread, the locking sleeve is provided with an internal thread, the locking sleeve is matched with the external thread, the locking sleeve is provided with an annular inner flange, the annular inner flange is provided with a plurality of through holes, each through hole corresponds to one blind hole, and each supporting rod penetrates through the corresponding through hole; and the locking sleeve can be rotated through the matching of the internal thread and the external thread, so that the annular inner flanging is annularly staggered relative to the shell to press and lock each supporting rod. According to the utility model, dimpling operation of skins with different curvatures is realized, the working efficiency can be improved by 80%, and the percent of pass is improved to more than 95% from the original 75%.

Description

Technical Field

[0001] This utility model relates to aircraft assembly technology, specifically a countersinking device suitable for curved surfaces. Background Technology

[0002] During the assembly of the wing-body fairing, the composite skin is connected to the frame structure with bolts. To ensure aerodynamic shape, countersunk bolts are used for installation. A countersunk limiter is required during assembly to create countersunk notches on the composite skin. Due to the shape characteristics of the wing-body fairing, the composite skin has various curvatures. This means that commonly used countersunk limiters cannot completely conform to the outer surface of the curved composite skin during countersunking, leading to wobbling and resulting in uneven countersunking or out-of-tolerance hole diameters after countersunking. Utility Model Content

[0003] The purpose of this utility model is to provide a method and device for countersinking of multi-curvature parts. The method is simple and easy to operate. It is used for countersinking operations in the area of ​​curved parts. The countersinking device can adapt to and fit the outer surface of the curved parts, ensuring that no shaking occurs during operation, thereby avoiding malfunctions.

[0004] The technical solution of this utility model is:

[0005] A countersinking device suitable for curved surfaces is provided, comprising a connecting rod 1, a housing 2, a small spring 3, an external thread 4, a support rod 5, a tool clamping device 7, and a locking sleeve 9;

[0006] The housing 2 has a central through hole, and the front end of the housing has multiple blind holes. The tool clamping device 7 is slidably disposed in the central through hole. The front end of the connecting rod 1 is axially connected and fixed to the tool clamping device as a whole. The rear end of the connecting rod 1 extends through the rear end of the housing. The rear end of the connecting rod can be matched and connected with a power tool. The tool clamping device can be detachably connected to the tool.

[0007] Each of the blind holes is equipped with a small spring, and a support rod 5 is inserted into each blind hole. The small spring provides elastic thrust to the support rod. The front end of the housing has an external thread, and the locking sleeve has an internal thread that matches the external thread. The locking sleeve also has an annular inner flange with multiple through holes, each corresponding to a blind hole. Each support rod passes through the corresponding through hole. Through the engagement of the internal and external threads, the locking sleeve can be rotated, causing the annular inner flange to be circumferentially misaligned relative to the housing, thus pressing and locking each support rod.

[0008] Furthermore, a preload spring 8 is provided inside the housing, which is located between the housing and the tool clamping device to provide elastic thrust to the tool clamping device.

[0009] Furthermore, the front end of the support rod has a skin tip 6 to protect the flexible curved surface such as the skin.

[0010] Furthermore, the blind hole and the support rod are in a spline fit.

[0011] Furthermore, the support rod is provided with knurling or teeth at the position corresponding to the locking sleeve to increase the frictional locking effect.

[0012] Furthermore, the housing and the tool clamping device are fitted with a small clearance.

[0013] Furthermore, a bearing is provided between the connecting rod and the housing.

[0014] Furthermore, the number of blind holes is at least six. Even further, the blind holes are evenly distributed.

[0015] The advantages of this utility model are: it realizes the countersinking operation of skins with different curvatures, shortens the operation cycle from the original 2.5 days to 0.5 days, and can improve work efficiency by 80%. The pass rate of countersinking using this solution is increased from the original 75% to more than 95%. At the same time, this solution can achieve fast and stable operation, effectively improve the countersinking operation efficiency and assembly quality of curved parts, and reduce the scrap and rework costs caused by failures. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0017] Figure 2 This is a structural appearance drawing of the present invention;

[0018] Figure 3 for Figure 2 Sectional view along direction B;

[0019] Figure 4 This is a schematic diagram of the annular inner flange of the locking sleeve;

[0020] Figure 5 for Figure 4 Sectional view along line C;

[0021] Figure 6 This is a cross-sectional view of the support rod and the blind hole;

[0022] Figure 7 This is a schematic diagram illustrating the working principle of the locking sleeve.

[0023] Figure 8 This is a schematic diagram illustrating the use of this utility model;

[0024] Figure 9 This is a schematic diagram of the working process of this utility model;

[0025] Wherein: 1-connecting rod, 2-housing, 3-small spring, 4-external thread, 5-support rod, 6-piston head, 7-tool clamping device, 8-preload spring, 9-locking sleeve, 10-pneumatic drill connection. Detailed Implementation

[0026] 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.

[0027] A countersinking device suitable for curved surfaces is provided, comprising a connecting rod 1, a housing 2, a small spring 3, an external thread 4, a support rod 5, a tool clamping device 7, and a locking sleeve 9;

[0028] The housing 2 has a central through hole, and the front end of the housing has multiple blind holes. The tool clamping device 7 is slidably disposed in the central through hole. The front end of the connecting rod 1 is axially connected and fixed to the tool clamping device as a whole. The rear end of the connecting rod 1 extends through the rear end of the housing. The rear end of the connecting rod can be matched and connected with a power tool. The tool clamping device can be detachably connected to the tool.

[0029] Each of the blind holes is equipped with a small spring, and a support rod 05 is inserted into each of the blind holes. The small spring provides elastic thrust to the support rod. The front end of the housing has an external thread, and the locking sleeve has an internal thread that matches the external thread. The locking sleeve also has an annular inner flange with multiple through holes, each corresponding to a blind hole. Each support rod passes through the corresponding through hole. Through the engagement of the internal and external threads, the locking sleeve can be rotated, causing the annular inner flange to be circumferentially misaligned relative to the housing, thus pressing and locking each support rod.

[0030] A preload spring 8 is provided inside the housing. The preload spring is located between the housing and the tool clamping device, and provides elastic thrust to the tool clamping device.

[0031] The support rod has a protective sheath 6 at its front end to protect flexible curved surfaces such as the skin.

[0032] The blind hole and the support rod are connected by a spline.

[0033] The housing and the tool clamping device are fitted with a small clearance.

[0034] A bearing is provided between the connecting rod and the housing.

[0035] The number of blind holes is at least six. The blind holes are evenly distributed.

[0036] 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 countersinking device suitable for curved surfaces, characterized in that: It includes a connecting rod (1), a housing (2), a small spring (3), an external thread (4), a support rod (5), a tool clamping device (7), and a locking sleeve (9); The housing (2) has a central through hole, and the front end of the housing has multiple blind holes. The tool clamping device (7) is slidably disposed in the central through hole. The front end of the connecting rod (1) is axially connected and fixed to the tool clamping device as a whole. The rear end of the connecting rod (1) extends through the rear end of the housing. The rear end of the connecting rod can be matched and connected with a power tool. The tool clamping device can be detachably connected to the tool. Each of the blind holes is provided with a small spring, and each of the blind holes is inserted with a support rod (5). The small spring provides elastic thrust to the support rod. The front end of the housing has an external thread, and the locking sleeve has an internal thread that is adapted to the external thread. The locking sleeve has an annular inner flange with multiple through holes, each corresponding to a blind hole. Each support rod passes through the corresponding through hole. Through the cooperation of the internal and external threads, the locking sleeve can be rotated, so that the annular inner flange is circumferentially misaligned relative to the housing to press and lock each support rod.

2. The countersinking device suitable for curved surfaces as described in claim 1, characterized in that: A preload spring (8) is provided inside the housing. The preload spring is located between the housing and the tool clamping device, and provides elastic thrust to the tool clamping device.

3. The countersinking device suitable for curved surfaces as described in claim 1, characterized in that: The support rod has a leather head (6) at its front end.

4. The countersinking device suitable for curved surfaces as described in claim 1, characterized in that: The blind hole and the support rod are connected by a spline.

5. The countersinking device suitable for curved surfaces as described in claim 1, characterized in that: The support rod is provided with knurling or teeth at the position corresponding to the locking sleeve to increase the friction and locking effect.

6. The countersinking device suitable for curved surfaces as described in claim 1, characterized in that: The housing and the tool clamping device are fitted with a small clearance.

7. The countersinking device suitable for curved surfaces as described in claim 1, characterized in that: A bearing is provided between the connecting rod and the housing.

8. The countersinking device suitable for curved surfaces as described in claim 1, characterized in that: The number of blind holes is at least six.

9. A countersinking device suitable for curved surfaces as described in claim 8, characterized in that: The blind holes are evenly distributed.

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