A rivet removing device with centering function
Patent Information
- Application Number
- CN202522784745.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-29
AI Technical Summary
The existing rivet removal process is difficult to operate, easily damages the surface of the parts, and the drill bit is difficult to keep stable in the center of the rivet hole, resulting in quality problems.
A rivet removal device with a centering function was designed, including a power transmission unit, a drill bit, a housing, and a centering limiter. The centering limiter nests the rivet head to ensure that the drill bit is in the center of the rivet hole, thus avoiding damage to the hole wall.
It improves the stability and efficiency of rivet removal, reduces scratches on parts surfaces, lowers the difficulty of operation and workload, and is suitable for rivet removal with various hole diameters and special shapes.
Smart Images
Figure CN224926988U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a rivet removal device with a centering function, which is applied in the field of aircraft assembly technology. Background Technology
[0002] Riveting is a widely used connection method in aircraft assembly. When the riveting quality is substandard or the rivet connection needs to be disassembled, tools are required to remove the rivets. The general process for rivet removal is as follows: First, a small hole is drilled into the rivet head to weaken the rivet shank; then, a punch or other tool is used to remove the rivet head; finally, the punch is used to force the rivet shank out of the hole. The following risks exist during rivet removal: 1. Difficult to operate When drilling small holes in rivet heads, the drill bit must be kept stable in the center of the rivet head; otherwise, the drill bit will damage the hole wall. In practice, keeping the drill bit stably centered in the rivet head without damaging the hole wall is very difficult and requires a high level of skill from the operator. 2. Easily damages the surface of parts The rivet head has a small diameter, which makes it easy for the drill bit to slip when drilling small holes, causing the drill bit to scratch the product and resulting in quality problems. Utility Model Content
[0003] The purpose of this invention is to provide a simple-to-operate rivet removal device with a centering function, which enables high-quality and rapid rivet removal, reduces scratches on the product surface and hole walls, improves the efficiency of rivet removal operations, and reduces the workload and difficulty of the work.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a rivet removal device with a centering function, the removal device comprising a power transmission unit, a drill bit, a housing, and a centering limiter; the power transmission unit is placed inside the housing, one end of which extends out of the housing end and is connected to a power device, and the other end is connected to the drill bit, and drives the drill bit to rotate synchronously under the action of the power device; the drill bit is placed inside the centering limiter for drilling the rivet head; the housing and the centering limiter are hollow inside, and their ends are connected and fixed, with their center lines coaxial, and a positioning hole is provided at the end of the centering limiter away from the housing, the positioning hole being used to nest the rivet head; in use, the drill bit, driven by the power transmission unit, completes the rivet removal work.
[0005] Preferably, the outer diameter of the drill bit is the same as the diameter of the rivet shank.
[0006] Preferably, the housing has a stepped structure with progressively decreasing inner diameters, and the end with the smallest inner diameter is connected to the centering limiter.
[0007] Preferably, the power transmission unit includes a rotating shaft and a limiting part. One end of the rotating shaft is connected to the power device as a mounting part, and the other end is connected to the drill bit. The limiting part is installed on the rotating shaft and close to the mounting part. Its outer diameter is between the boss near the clamp and the maximum inner diameter of the housing, thereby limiting the rotating shaft.
[0008] Preferably, the shaft has a stepped structure with its outer diameter increasing sequentially, and a bearing is radially installed in the middle of the shaft, with the bearing placed on a boss near the drill bit.
[0009] Preferably, a spring is fitted onto the rotating shaft, and the spring is positioned between the limiting part and the bearing.
[0010] Preferably, a protrusion is provided along the circumference of the end of the shaft near the drill bit, and the outer diameter of the protrusion is between the minimum inner diameter of the housing and the minimum outer diameter of the housing.
[0011] Preferably, a groove is cut into the side wall of the centering limiter to discharge the chips generated during the rivet removal process.
[0012] Compared with the prior art, the present invention has the following advantages: 1. This removal device has the function of determining the axis of the rivet hole, which improves the stability of the rivet drilling process and ensures that the drill bit is always in the center of the rivet hole during the removal of the rivet. It will not damage the wall of the rivet hole throughout the process and avoids slipping and scratching the product. 2. The tool has a simple overall structure that is easy to disassemble and replace parts, which gives it a great advantage for mass production and promotion. 3. Because this tool can be used with centering limiters of various hole diameters, it is suitable for rivet disassembly work with various hole diameters. In addition, the centering limiter can also be customized according to the shape of the rivet head. By relying on the fit between the centering limiter and the rivet head, stable coaxiality is ensured during rivet disassembly, solving the problem of difficult disassembly of special-shaped rivets such as semi-circular heads. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 yes Figure 1 A sectional view; Figure 3 This is a schematic diagram illustrating the use of an embodiment of this utility model; Figure 1-3 In the middle, 1. shaft; 2. clamp; 3. housing; 4. spring; 5. bearing; 6. drill bit; 7. centering limiter; 8. fixing pin; 9. bolt; 10. material layering; 11. forming rivet. Detailed Implementation
[0014] It should be noted that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use. They are only for the convenience of describing this utility model and 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.
[0015] The following is in conjunction with the appendix Figure 1-3 Further details of this utility model: A rivet removal device with a centering function comprises a rotating shaft 1, a clamp 2, a housing 3, a spring 4, a bearing 5, a drill bit 6, a centering limiter 7, a fixing pin 8, and a bolt 9. Figure 1 As shown, the centering limiter 7 is detachable, allowing the tool to be used with centering limiters of various hole diameters; the housing 3 and clamp 2 control the extension length of the shaft 1 and drill bit 6, preventing the drill bit from extending too far and interfering with the centering limiter 7 when removing rivets; the shaft 1 can be connected to a pneumatic drill to drive the drill bit 6 to drill rivet holes. Details are as follows: Rotary shaft 1: Rotary shaft 1 has a stepped structure, with its outer diameter increasing sequentially from top to bottom. In this embodiment, rotary shaft 1 includes three sections: a small shaft section, a middle shaft section, and a large shaft section. An axial mounting hole is opened at the front end of rotary shaft 1 (bottom of the large shaft section). The inner diameter of the mounting hole is consistent with the outer diameter of the top of the drill bit 6. The top of the drill bit 6 is inserted into the mounting hole to connect rotary shaft 1 and drill bit 6. At the same time, a boss is provided along the circumference of the front end of the rotary shaft. The outer diameter of the boss is larger than the inner diameter of the bottom of the housing 3 and smaller than or equal to the outer diameter of the bottom of the housing. The rear end (top) serves as the mounting part and is connected to the air drill to drive the drill bit 6 to drill rivets. Clamp 2: Clamp 2 is installed on the rotating shaft 1 and close to the mounting part. Its outer diameter is between the boss near the clamp (the first boss from top to bottom) and the maximum inner diameter of the housing 1. When clamp 2 moves downward together with the rotating shaft, the first boss in the housing limits the rotating shaft 1 to prevent the rotating shaft 1 from extending too far and damaging the product surface. In this embodiment, pin holes are opened at the corresponding positions of clamp 2 and rotating shaft 1, and the two are connected together by a matching fixing pin 8. Housing 3: The interior of housing 3 is hollow and has a stepped structure. Its inner and outer diameters decrease sequentially from top to bottom. It is used to accommodate internal parts such as rotating shaft 1. At the same time, the outer diameter of the small shaft section of housing 3 is adapted to the inner diameter of one end of the centering limiter. Threaded holes are opened at the corresponding positions of the shaft and the centering limiter 7. The two are connected and fixed together by the matching bolts 9. Spring 4: Spring 4 is fitted onto the central section of the rotating shaft 1, with its two ends abutting against the bottom surface of the clamp 2 and the top surface of the bearing 5; it absorbs the vibration and impact energy during the rivet removal process and resets the rotating shaft and drill bit after the external force is removed. Bearing 5: Bearing 5 is installed in the middle section of the rotating shaft and is placed on the boss near the drill bit 6. During the riveting process, it plays the role of reducing friction between the rotating shaft and the housing and providing lubrication. Drill bit 6: The outer diameter of drill bit 6 is consistent with the diameter of the rivet shank on the material stack 10; a suitable drill bit can be replaced according to the diameter of the formed rivet 11 to perform rivet drilling work. Centering limiter 7: This is the core functional component of the removal device. The centering hole in front of the centering limiter 7 is used to nest the head of the rivet 11, so that the central axis of the rivet coincides with the axis of the centering limiter 7. The centering limiter is easy to disassemble, allowing the tool to be used with centering limiters of various hole diameters, thus adapting to rivets of multiple hole diameters and types. The centering limiter 7 has slots on both sides to facilitate the discharge of chips generated during rivet removal. Fixing pin 8: Used to fix the rotating shaft 1 and the clamp 2; Bolt 9: Connects housing 3 and centering limiter 7.
[0016] The usage method is as follows: (1) Place the rotating shaft 1, bearing 5 and spring 4 into the housing 3 in sequence, and use clamp 2 to fix the rotating shaft 1; (2) Insert the drill bit 6 into the shaft 1, and then install the centering limiter 7 below the housing 3; (3) Install the rivet removal device on a pneumatic drill or electric drill; (4) Align the centering hole of the centering limiter 7 with the head of the forming rivet 11 so that the lower surface of the centering limiter 7 fits against the surface of the material stack 10.
[0017] (5) Start the air drill or electric drill and make the drill bit 6 stably drill a small hole on the head of the shaped rivet 11 until the clamp 2 is limited by the housing 3. (6) Stop the air drill or electric drill. The drill bit 6 will be withdrawn from the small hole under the action of the spring 4. Remove the rivet removal device. (7) Continue to complete the removal of rivets such as head removal and punching.
[0018] The above embodiments are merely preferred embodiments of this utility model and do not constitute a limitation thereof. Any extensions, modifications, etc., made by those skilled in the art without departing from the principle of this utility model should be included within the protection scope of this utility model.
Claims
1. A rivet removal device with a centering function, characterized in that: The removal device includes a power transmission unit, a drill bit, a housing, and a centering limiter. The power transmission unit is located inside the housing, with one end extending out of the housing and connected to a power device, and the other end connected to the drill bit. Under the action of the power device, it drives the drill bit to rotate synchronously. The drill bit is placed inside the centering limiter and is used to drill the rivet head. The housing and the centering limiter are hollow inside, and their ends are connected and fixed, with their center lines coaxial. A positioning hole is provided at the end of the centering limiter away from the housing, which is used to nest the rivet head. In use, the drill bit, driven by the power transmission unit, completes the rivet removal work.
2. The rivet removal device with centering function according to claim 1, characterized in that: The outer diameter of the drill bit is the same as the diameter of the rivet shank.
3. The rivet removal device with centering function according to claim 1, characterized in that: The housing has a stepped structure with decreasing inner diameters, and the end with the smallest inner diameter is connected to the centering limiter.
4. The rivet removal device with centering function according to claim 3, characterized in that: The power transmission unit includes a rotating shaft and a limiting part. One end of the rotating shaft is connected to the power unit as a mounting part, and the other end is connected to the drill bit. The limiting part is installed on the rotating shaft and close to the mounting part. Its outer diameter is between the boss near the clamp and the maximum inner diameter of the housing, thereby limiting the rotating shaft.
5. The rivet removal device with centering function according to claim 4, characterized in that: The shaft has a stepped structure with its outer diameter increasing sequentially. A bearing is radially installed in the middle of the shaft and is placed on a boss near the drill bit.
6. The rivet removal device with centering function according to claim 5, characterized in that: A spring is fitted onto the shaft, and the spring is positioned between the limiting part and the bearing.
7. The rivet removal device with centering function according to claim 4, characterized in that: A protrusion is provided on the circumference of the end of the shaft near the drill bit, and the outer diameter of the protrusion is between the minimum inner diameter and the minimum outer diameter of the housing.
8. The rivet removal device with centering function according to claim 1, characterized in that: A groove is cut into the side wall of the centering limiter to discharge the chips generated during the rivet removal process.