Auxiliary device for disassembling raised head rivet
By designing a rivet disassembly auxiliary device that includes a guide sleeve, drill rod, bearing, and four-jaw slider, the problems of inaccurate positioning and low efficiency in the disassembly of convex rivets are solved, achieving fast and accurate rivet disassembly and reducing the difficulty of operation and the risk of damage to parts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGHE AIRCRAFT INDUSTRIES CORPORATION
- Filing Date
- 2025-04-08
- Publication Date
- 2026-04-28
AI Technical Summary
Existing technologies for disassembling convex rivets suffer from problems such as inaccurate positioning, low efficiency, high skill requirements for operators, and damage to parts. Therefore, there is a need for an auxiliary device for rivet disassembly that can accurately position the parts without damaging them.
An auxiliary device was designed, comprising a guide sleeve, drill rod, bearing, drill rod spring, four-jaw slider, and drill bit. The four-jaw slider automatically locates the rivet center, the drill rod spring provides axial force, and the drill bit is limited to prevent slippage, thus achieving rapid and accurate rivet disassembly.
It achieves precise positioning during the rivet disassembly process, improves disassembly efficiency, reduces the skill requirements for operators, avoids damage to parts, and has a simple and reliable structure.
Smart Images
Figure CN224168672U_ABST
Abstract
Description
Technical Field
[0001] This invention pertains to aircraft riveting and assembly technology, and relates to an auxiliary device for disassembling convex head rivets. Background Technology
[0002] In the riveting and assembly process of aircraft manufacturing parts, a large number of rivets of various specifications are used. During the riveting process, rivets often fail to meet the requirements and need to be disassembled and re-riveted. The commonly used disassembly method is to directly disassemble them using ordinary drill bits. However, the drill bit is not accurately positioned on the cam rivet and is prone to slipping. Existing methods have problems such as low disassembly efficiency, high skill requirements for operators, inaccurate positioning leading to substandard rivet holes, and damage to parts. Therefore, it is necessary to invent a rivet disassembly auxiliary device to ensure accurate positioning during rivet disassembly without damaging parts, without enlarging rivet holes, improve the efficiency of rivet disassembly, and reduce the requirements for operators. Summary of the Invention
[0003] This application provides an auxiliary device for disassembling convex rivets, solving the problem of inaccurate positioning during convex rivet disassembly and improving work efficiency and quality. It provides auxiliary limiting for the drill bit, ensuring that the drill bit is aligned with the center of the convex rivet and preventing slippage during drilling.
[0004] Technical solution: This application provides an auxiliary device for disassembling a convex rivet, comprising a guide sleeve 1, a drill rod 2, a first bearing 3, a drill rod spring 4, a second bearing 5, a four-jaw slider 6, a slider spring 7, and a drill bit 8, wherein:
[0005] The guide sleeve 1 is cylindrical in shape. The upper end of the barrel has a straight hole, and the lower end has a stepped hole for installing the second bearing 5, drill rod 2, drill rod spring 4, and first bearing 3. The outer surface of the lower end of the barrel has 4 grooves for installing the four-jaw slider 6 and slider spring 7. The guide sleeve 1 provides a mounting support structure for other parts.
[0006] The drill rod 2 is a round straight rod with a boss in the middle. The upper end of the drill rod is installed in the first bearing 3. The lower surface of the boss contacts the upper end of the drill rod spring 4. The lower end of the drill rod is installed in the second bearing 5. The drill rod 2 is used to transmit power. The upper end is connected to the pneumatic tool and the upper end is connected to the drill bit 8.
[0007] The first bearing 3 and the second bearing 5 are in the shape of rings and are used to install the drill rod 2 inside the guide sleeve 1. The inner diameter of the first bearing 3 and the inner diameter of the second bearing 5 are both matched with the outer diameter of the drill rod 2, and the outer diameter of the first bearing 3 and the outer diameter of the second bearing 5 are both matched with the inner diameter of the guide sleeve 1.
[0008] Specifically, the drill rod spring 4 is a helical spring. The drill rod spring 4 is installed inside the guide sleeve 1 and sleeved on the outside of the drill rod 2. The upper end of the drill rod spring 4 contacts the lower surface of the boss of the drill rod 2, and the lower end contacts the upper surface of the second bearing 5. It is used to transmit axial force through the drill rod 2 to the guide sleeve 1.
[0009] Specifically, the four-jaw slider 6 is a slider with bosses. The four sliders are distributed in a circle at 90°. The sliders can slide radially. Each slider is cube-shaped with bosses on both sides. The cross-sectional shape of the slider matches the inner shape of the groove at the lower end of the guide sleeve 1. The four-jaw slider 6 is used to find the center of the convex head rivet and slides radially in the groove of the guide sleeve 1.
[0010] Specifically, the slider spring 7 is in the shape of a helical spring. The diameter of the slider spring 7 matches the inner dimensions of the groove cross-section at the lower end of the guide sleeve 1, and it can be installed in the groove. One end of the spring contacts the outer end face of the slider, and the other end of the spring contacts the inner end face of the groove. The slider spring 7 provides the thrust for the four-jaw slider 6 to slide radially in the groove of the guide sleeve 1.
[0011] Specifically, drill bit 8 is a threaded shank twist drill bit. The upper end of the threaded shank can be installed at the lower end of drill rod 2. The diameter of drill bit 8 can be selected according to the diameter of the rivet to be disassembled. Drill bit 8 is used to disassemble the rivet head part.
[0012] Specifically, the guide sleeve 1, drill rod 2, first bearing 3, second bearing 5, and four-jaw slider 6; drill rod spring 4 and slider spring 7 are made of spring steel; and drill bit 8 is made of high-speed alloy steel.
[0013] In summary, this application provides an auxiliary device for disassembling convex rivets, suitable for the rapid and precise disassembly of convex rivets during aircraft riveting and assembly. This device automatically locates the center of the convex rivet and provides a limiting function to prevent the drill bit from slipping on it. The device has a simple structure, excellent stability and reliability, and can quickly and effectively achieve the rapid and precise disassembly of convex rivets. This method and device are widely applicable. Attached Figure Description
[0014] Figure 1 A schematic diagram of a convex head rivet disassembly auxiliary device provided in this application;
[0015] Figure 2 A schematic diagram of the structure of a guide sleeve provided in this application;
[0016] Figure 3 A schematic diagram of a drill pipe provided in this application;
[0017] Figure 4 A schematic diagram of the structure of a first bearing provided in this application;
[0018] Figure 5 A schematic diagram of the structure of a drill pipe spring provided in this application;
[0019] Figure 6 A schematic diagram of the structure of a second bearing provided in this application;
[0020] Figure 7 This application provides a schematic diagram of the structure of a four-claw slider.
[0021] Figure 8 A schematic diagram illustrating the usage of an auxiliary device for disassembling a convex head rivet, as provided in this application;
[0022] Among them, 1-guide sleeve, 2-drill rod, 3-first bearing, 4-spring, 5-second bearing, 6-four-jaw slider, 7-spring, 8-drill bit, 9-mounting plate, 10-rivet. Detailed Implementation
[0023] Example 1
[0024] like Figure 1 As shown, this application provides an auxiliary device for disassembling a convex rivet, including a guide sleeve 1, a drill rod 2, a first bearing 3, a drill rod spring 4, a second bearing 5, a four-jaw slider 6, a slider spring 7, and a drill bit 8, wherein:
[0025] The guide sleeve 1 is cylindrical in shape. The upper end of the barrel has a straight hole, and the lower end has a stepped hole for installing the second bearing 5, drill rod 2, drill rod spring 4, and first bearing 3. The outer surface of the lower end of the barrel has 4 grooves for installing the four-jaw slider 6 and slider spring 7. The guide sleeve 1 provides a mounting support structure for other parts.
[0026] The drill rod 2 is a round straight rod with a boss in the middle. The upper end of the drill rod is installed in the first bearing 3. The lower surface of the boss contacts the upper end of the drill rod spring 4. The lower end of the drill rod is installed in the second bearing 5. The drill rod 2 is used to transmit power. The upper end is connected to the pneumatic tool and the upper end is connected to the drill bit 8.
[0027] The first bearing 3 and the second bearing 5 are in the shape of rings and are used to install the drill rod 2 inside the guide sleeve 1. The inner diameter of the first bearing 3 and the inner diameter of the second bearing 5 are both matched with the outer diameter of the drill rod 2, and the outer diameter of the first bearing 3 and the outer diameter of the second bearing 5 are both matched with the inner diameter of the guide sleeve 1.
[0028] The drill rod spring 4 is a helical spring. The drill rod spring 4 is installed inside the guide sleeve 1 and sleeved outside the drill rod 2. The upper end of the drill rod spring 4 contacts the lower surface of the boss of the drill rod 2 and the lower end contacts the upper surface of the second bearing 5. It is used to transmit axial force through the drill rod 2 to the guide sleeve 1.
[0029] The four-jaw slider 6 is a slider with bosses. The four sliders are distributed in a circle at 90°. The sliders can slide radially. Each slider is cube-shaped with bosses on both sides. The cross-sectional shape of the slider matches the inner shape of the groove at the lower end of the guide sleeve 1. The four-jaw slider 6 is used to find the center of the convex head rivet and slides radially in the groove of the guide sleeve 1.
[0030] The slider spring 7 is in the shape of a helical spring. The diameter of the slider spring 7 matches the inner dimensions of the groove cross-section at the lower end of the guide sleeve 1, so that it can be installed in the groove. One end of the spring contacts the outer end face of the slider, and the other end of the spring contacts the inner end face of the groove. The slider spring 7 provides the thrust for the four-jaw slider 6 to slide radially in the groove of the guide sleeve 1.
[0031] Drill bit 8 is a threaded shank twist drill bit. The upper end of the threaded shank can be mounted on the lower end of drill rod 2. The diameter of drill bit 8 can be selected according to the diameter of the rivet to be disassembled. Drill bit 8 is used to disassemble the rivet head part.
[0032] Specifically, the guide sleeve 1, drill rod 2, first bearing 3, second bearing 5, and four-jaw slider 6; drill rod spring 4 and slider spring 7 are made of spring steel; and drill bit 8 is made of high-speed alloy steel.
[0033] Specifically, such as Figure 2 As shown, the guide sleeve 1 has an outer diameter of 20mm, a height of 55mm, and an inner diameter of 16mm. The inner diameter of the upper straight barrel part is 0.05mm larger than the outer diameter of the first bearing 3 and the second bearing 5, and 0.1mm larger than the outer diameter of the boss of the drill rod 2. The diameter of the lower boss hole is 2mm larger than the diameter of the drill rod 2. The inner dimension of the lower sliding groove is 0.1mm larger than the outer dimension of the four-jaw slider 6.
[0034] Specifically, such as Figure 3 As shown, the drill rod 2 has an outer diameter of 6mm and a height of 75mm. The outer diameter of the straight rod at the top and bottom is 0.05mm smaller than the inner diameter of the first bearing 3 and the second bearing 5. The outer diameter of the boss is 0.1mm smaller than the inner diameter of the guide sleeve 1. The lower end has a threaded hole (M8) for mounting the drill bit 8, which matches the mounting thread on the upper part of the drill bit 8.
[0035] Specifically, such as Figure 4 , 6 As shown, the outer diameter of the drill rod spring 4 is less than 16mm, which is 1mm smaller than the inner diameter of the guide sleeve 1. The inner diameter is 1mm larger than the outer diameter of the drill rod 2. The spring height is twice the distance from the lower surface of the drill rod 2 boss to the upper surface of the second bearing 5.
[0036] Specifically, such as Figure 5 As shown, the first bearing 3 and the second bearing 5 are annular ball bearings. The outer diameter of the bearings is 0.05 mm smaller than the inner diameter of the guide sleeve 1, and the inner diameter is 0.05 mm larger than the outer diameter of the drill rod 2.
[0037] Specifically, such as Figure 7 As shown, the four-jaw slider 6 has an outer dimension that is 0.1mm smaller than the inner dimension of the groove at the lower end of the guide sleeve 1. The boss of the slider is engaged with the groove of the guide sleeve, and the slider can slide radially with a radial sliding amount of not less than 2mm. When the slider is in the popped-out state, the overlap between the slider and the groove is not less than 2mm, and the gap between the outer side of the slider and the inner side of the groove is 3mm.
[0038] Specifically, the slider spring 7 has an outer diameter that is 0.1 mm smaller than the width of the guide sleeve 1 groove, with a diameter of approximately 1 mm and a spring height of approximately 4 mm.
[0039] Specifically, drill bit 8 is a threaded drill bit with a threaded upper shank (M8) that matches the threaded hole (M8) at the bottom of drill rod 2. When in use, drill bit 8 is installed at the bottom of drill rod 2.
[0040] Example 2
[0041] like Figure 8 As shown, this application provides a method for using an auxiliary device for disassembling protruding rivets, the method comprising:
[0042] Step 1. Install the drill bit 8 at the lower end of the drill rod 2 and install the rivet disassembly auxiliary device at the upper end of the drill rod 2 on a pneumatic or electric tool;
[0043] Step 2. Align the rivet disassembly aid device with the rivet 10 protrusion riveted to the mounting plate 9;
[0044] Step 3. Press down the pneumatic or electric tool, and the inner claw of the four-jaw slider 6 of the rivet disassembly auxiliary device contacts the protruding head of the rivet 10. The four-jaw slider 6 moves automatically in the radial direction, and the slider spring 7 pushes the guide sleeve 1 to move and adjust. The guide sleeve 1 automatically finds the center of the rivet head.
[0045] Step 4. Start the pneumatic or electric tool. The drill rod 2 and drill bit 8 will rotate. The drill bit will cut off the rivet protrusion, completing the rivet disassembly.
[0046] In summary, this application provides an auxiliary device for disassembling convex rivets. It has a simple structure and is easy to operate. Disassembling rivets using this device is simple, convenient, and efficient, requiring minimal operator skill. When disassembling rivets using this device, the drill rod 2 is pressed down, and the drill rod spring 4 presses the guide sleeve 1 against the surface of the assembled part, ensuring the drill bit is perpendicular to the part surface. The device uses a four-jaw slider 6 to contact the rivet head. The four-jaw slider 6 automatically moves radially, and the slider spring 7 pushes the guide sleeve 1 to move and adjust. The guide sleeve 1 can automatically locate the center of the convex rivet head. The guide sleeve 1 ensures that the drill rod 2, drill bit 8, and rivet are coaxial, ensuring the drilling position for rivet disassembly is on the rivet axis. It has a limiting function to prevent slippage, facilitating rivet disassembly, and is simple and convenient to operate. This device is suitable for disassembling convex rivets with a diameter of 2-6mm; only a drill bit with the same diameter as the rivet needs to be installed on the drill rod.
Claims
1. An auxiliary device for disassembling convex head rivets, characterized in that, Includes guide sleeve (1), drill rod (2), first bearing (3), drill rod spring (4), second bearing (5), four-jaw slider (6), slider spring (7), and drill bit (8), wherein: The guide sleeve (1) is cylindrical in shape. The upper end of the barrel has a straight hole, and the lower end has a stepped hole for installing the second bearing (5), drill rod (2), drill rod spring (4), and first bearing (3). The outer surface of the lower end of the barrel has four grooves for installing the four-jaw slider (6) and slider spring (7). The guide sleeve (1) provides a support structure for installing other parts. The drill rod (2) is a straight rod with a boss in the middle. The upper end of the drill rod is installed in the first bearing (3). The lower surface of the boss contacts the upper end of the drill rod spring (4). The lower end of the drill rod is installed in the second bearing (5). The drill rod (2) is used to transmit power. The upper end is connected to the pneumatic tool and the upper end is connected to the drill bit (8). The first bearing (3) and the second bearing (5) are in the shape of a ring and are used to install the drill rod (2) inside the guide sleeve (1). The inner diameter of the first bearing (3) and the inner diameter of the second bearing (5) are both matched with the outer diameter of the drill rod (2). The outer diameter of the first bearing (3) and the outer diameter of the second bearing (5) are both matched with the inner diameter of the guide sleeve (1).
2. The auxiliary device for disassembling protruding rivets according to claim 1, characterized in that, The drill rod spring (4) is a helical spring. The drill rod spring (4) is installed inside the guide sleeve (1) and sleeved on the outside of the drill rod (2). The upper end contacts the lower surface of the drill rod (2) boss and the lower end contacts the upper surface of the second bearing (5). It is used to transmit axial force through the drill rod (2) to the guide sleeve (1).
3. The auxiliary device for disassembling protruding rivets according to claim 1, characterized in that, The four-jaw slider (6) is a slider with a boss. The four sliders are distributed in a circle at 90°. The slider slides radially. The shape of a single slider is a cube with bosses on both sides. The cross-sectional shape of the slider matches the inner shape of the groove at the lower end of the guide sleeve (1). The four-jaw slider (6) is used to find the center of the rivet head and slides radially in the groove of the guide sleeve (1).
4. The auxiliary device for disassembling protruding rivets according to claim 1, characterized in that, The slider spring (7) is in the shape of a helical spring. The diameter of the slider spring (7) matches the inner dimensions of the groove cross-section at the lower end of the guide sleeve (1). It can be installed in the groove. One end of the spring contacts the outer end face of the slider and the other end of the spring contacts the inner end face of the groove. The slider spring (7) provides the thrust for the four-jaw slider (6) to slide radially in the groove of the guide sleeve (1).
5. The auxiliary device for disassembling protruding rivets according to claim 1, characterized in that, The drill bit (8) is a threaded shank twist drill bit. The upper end of the threaded shank can be installed at the lower end of the drill rod (2). The diameter of the drill bit (8) is selected according to the diameter of the rivet to be disassembled. The drill bit (8) is used to disassemble the rivet head part.
6. The auxiliary device for disassembling protruding rivets according to claim 1, characterized in that, Specifically, the guide sleeve (1), drill rod (2), first bearing (3), second bearing (5), and four-jaw slider (6); the drill rod spring (4) and slider spring (7) are made of spring steel; the drill bit (8) is made of high-speed alloy steel.