An automated mechanism integrating clamping and riveting

Abstract

This application relates to an integrated automatic clamping and riveting mechanism, belonging to the fields of aircraft manufacturing and automatic drilling and riveting technology. Utilizing the technical characteristics of compressed air within a pneumatic structure, it can buffer changes in clamping force during the riveting process, thereby ensuring stable clamping force during the riveting movement. A single displacement sensor enables multifunctional data acquisition, including recording the clamping thickness and the height of the riveted object, saving costs and reducing the burden on the data acquisition system.

Description

Technical Field

[0001] This application relates to an integrated clamping and riveting automatic mechanism, belonging to the fields of aircraft manufacturing and automatic drilling and riveting technology. Background Technology

[0002] Aircraft assembly is a critical step in aircraft manufacturing, with riveting being the primary connection method. To ensure consistent aircraft manufacturing quality and improve assembly efficiency, automated riveting technology is widely used. The key quality control points for automated riveting technology are process parameters, including those for drilling and riveting. To ensure coaxiality in riveting quality and avoid interference with aircraft components, a combination design of clamping sleeves and riveting mandrels is required. Current control methods rely on force sensor feedback and servo motor displacement adjustment to control clamping and riveting forces. However, this method has the following drawback: fluctuations in clamping force due to the overall movement of the clamping sleeve and riveting mandrel during the riveting process lead to unstable riveting quality. Summary of the Invention

[0003] In order to overcome the above-mentioned technical defects, the present invention provides an integrated clamping and riveting automatic mechanism, which uses a cylinder to control the clamping force and a force sensor to control the riveting force. By utilizing the technical feature that the movement of the clamping sleeve by the cylinder does not affect the clamping force, the clamping force is kept stable, thereby solving the quality problem of automatic drilling and riveting.

[0004] According to one aspect of this application, an integrated clamping and riveting automatic mechanism is provided, including a ball screw (1), a drive structure (2), a cylinder (3), a rotating device (4), a push rod (5), a riveting core (6), a clamping sleeve (7), a return spring (8), a displacement sensor (9), and a pressure sensor (10).

[0005] The drive structure (2) is connected to the ball screw (1), the cylinder (3) is connected to the drive structure (2), the cylinder (3) drives the rotating device (4) to move, the rivet core (6), the clamping sleeve (7) and the return spring (8) are connected to the rotating device (4), the drive device (2) drives the push rod (5) to move, the push rod (5) drives the rivet core (6) to move, the displacement sensor (9) is set between the drive structure (2) and the rotating device (4), and the pressure sensor (10) is set between the drive structure (2) and the push rod (5).

[0006] The work is as follows:

[0007] 1) First, the initial state is reset, and the specific implementation is as follows:

[0008] ① To achieve an angle that facilitates processing, a rotating device (4) is used to rotate the riveting core (6), clamping sleeve (7), and return spring (8);

[0009] ② Use the preset air pressure to drive the cylinder (3) to the highest point to ensure that the clamping sleeve (7) is not subjected to external force;

[0010] ③Use the return spring (8) to ensure the initial relative displacement of the riveting core (6) and the clamping sleeve (7);

[0011] ④ Use displacement sensor (10) to record the initial position of drive structure (2) and rotating device (4).

[0012] 2) The moving drive and real-time feedback of the displacement sensor (9) complete the clamping, specifically as follows:

[0013] ① Use a ball screw (1) to move the drive structure (2);

[0014] ② The movement of cylinder (3) and rotating device (4) is completed by using drive structure (2), and the overall movement of pressing core (6) and clamping sleeve (7) is finally completed according to the connection diagram of this technology;

[0015] ③ When the clamping sleeve (7) moves and contacts the clamped object, it will be subjected to external force, and then fed back to the cylinder (3) in the order of the return spring (8) and the rotating device (4). If the force on the cylinder (3) is greater than the preset air pressure, there will be displacement between the rotating device (4) and the drive structure (2).

[0016] ④ When the signal fed back in real time by the displacement sensor (9) between the rotating device (4) and the driving structure (2) changes, the clamping is completed. At the same time, the displacement information of the displacement sensor (9) is recorded and the thickness information of the clamped object is collected.

[0017] 3) Continue to push and provide real-time feedback to the pressure sensor (10) to complete the riveting process, specifically as follows:

[0018] ① Continue to push the drive structure (2). Since the cylinder (3) maintains the preset air pressure, the clamping force will no longer change.

[0019] ② Continue to push the drive structure (2), push rod (5) and rivet core (6);

[0020] ③ When the riveting core (6) moves and contacts the riveting object, it will receive an external force and feed the force back to the pressure sensor (10).

[0021] ④ If the pressure sensor (10) reaches the preset riveting force, the riveting is completed. At the same time, the displacement information of the displacement sensor (9) is recorded, and the height information of the riveted object is collected.

[0022] 4) After riveting is completed, a recovery operation is performed, specifically as follows:

[0023] ①Use a ball screw (1) to move in the opposite direction to push the drive structure (2);

[0024] ② First, the drive structure (2), push rod (5) and rivet core (6) will move, and then the rivet will be released;

[0025] ③ During the reverse movement, the cylinder (3) continues to be subjected to force in the order of clamping sleeve (7), return spring (8) and rotating device (4). When the force is greater than the preset air pressure, the internal structure of the cylinder moves, while the rotating device (4) and clamping sleeve (7) do not move. If the force on the cylinder (3) is less than the preset air pressure, the rotating device (4) will move.

[0026] ④ During the reverse movement of the rotating device (4), due to the force on the return spring (8), the clamping sleeve (7) does not move until the return spring (8) returns to its initial position, at which point the clamping object is released.

[0027] ⑤ Continue to move the drive structure (2) in the reverse direction. After reaching the preset position, the recovery operation is completed.

[0028] The effects and benefits of this invention are: by using an integrated clamping and riveting automatic mechanism, the technical defect of clamping force fluctuation during the riveting movement process can be solved, and it has the following advantages:

[0029] 1. The use of compressed air in the pneumatic structure can buffer changes in clamping force during the riveting process, thereby ensuring stable clamping force during the riveting movement process;

[0030] 2. A single displacement sensor can acquire multifunctional data, including recording clamping thickness and the height of the press-fitted object, which can save costs and reduce the burden on the data acquisition system. Attached Figure Description

[0031] Figure 1 A schematic diagram of an automatic mechanism for integrated clamping and riveting.

[0032] The components include: 1. ball screw, 2. drive structure, 3. cylinder, 4. rotating device, 5. push rod, 6. rivet core, 7. clamping sleeve, 8. return spring, 9. displacement sensor, and 10. pressure sensor. Detailed Implementation

[0033] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0034] Example 1

[0035] An integrated clamping and riveting automatic mechanism includes a ball screw (1), a drive structure (2), a cylinder (3), a rotating device (4), a push rod (5), a riveting core (6), a clamping sleeve (7), a return spring (8), a displacement sensor (9), and a pressure sensor (10).

[0036] The drive structure (2) is connected to the ball screw (1), the cylinder (3) is connected to the drive structure (2), the cylinder (3) drives the rotating device (4) to move, the rivet core (6), the clamping sleeve (7) and the return spring (8) are connected to the rotating device (4), the drive device (2) drives the push rod (5) to move, the push rod (5) drives the rivet core (6) to move, the displacement sensor (9) is set between the drive structure (2) and the rotating device (4), and the pressure sensor (10) is set between the drive structure (2) and the push rod (5).

[0037] The work is as follows:

[0038] 1) First, the initial state is reset, and the specific implementation is as follows:

[0039] ① To achieve an angle that facilitates processing, a rotating device (4) is used to rotate the riveting core (6), clamping sleeve (7), and return spring (8);

[0040] ② Use the preset air pressure to drive the cylinder (3) to the highest point to ensure that the clamping sleeve (7) is not subjected to external force;

[0041] ③Use the return spring (8) to ensure the initial relative displacement of the riveting core (6) and the clamping sleeve (7);

[0042] ④ Use displacement sensor (10) to record the initial position of drive structure (2) and rotating device (4).

[0043] 2) The moving drive and real-time feedback of the displacement sensor (9) complete the clamping, specifically as follows:

[0044] ① Use a ball screw (1) to move the drive structure (2);

[0045] ② The movement of cylinder (3) and rotating device (4) is completed by using drive structure (2), and the overall movement of pressing core (6) and clamping sleeve (7) is finally completed according to the connection diagram of this technology;

[0046] ③ When the clamping sleeve (7) moves and contacts the clamped object, it will be subjected to external force, and then fed back to the cylinder (3) in the order of the return spring (8) and the rotating device (4). If the force on the cylinder (3) is greater than the preset air pressure, there will be displacement between the rotating device (4) and the drive structure (2).

[0047] ④ When the signal fed back in real time by the displacement sensor (9) between the rotating device (4) and the driving structure (2) changes, the clamping is completed. At the same time, the displacement information of the displacement sensor (9) is recorded and the thickness information of the clamped object is collected.

[0048] 3) Continue to push and provide real-time feedback to the pressure sensor (10) to complete the riveting process, specifically as follows:

[0049] ① Continue to push the drive structure (2). Since the cylinder (3) maintains the preset air pressure, the clamping force will no longer change.

[0050] ② Continue to push the drive structure (2), push rod (5) and rivet core (6);

[0051] ③ When the riveting core (6) moves and contacts the riveting object, it will receive an external force and feed the force back to the pressure sensor (10).

[0052] ④ If the pressure sensor (10) reaches the preset riveting force, the riveting is completed. At the same time, the displacement information of the displacement sensor (9) is recorded, and the height information of the riveted object is collected.

[0053] 4) After riveting is completed, a recovery operation is performed, specifically as follows:

[0054] ①Use a ball screw (1) to move in the opposite direction to push the drive structure (2);

[0055] ② First, the drive structure (2), push rod (5) and rivet core (6) will move, and then the rivet will be released;

[0056] ③ During the reverse movement, the cylinder (3) continues to be subjected to force in the order of clamping sleeve (7), return spring (8) and rotating device (4). When the force is greater than the preset air pressure, the internal structure of the cylinder moves, while the rotating device (4) and clamping sleeve (7) do not move. If the force on the cylinder (3) is less than the preset air pressure, the rotating device (4) will move.

[0057] ④ During the reverse movement of the rotating device (4), due to the force on the return spring (8), the clamping sleeve (7) does not move until the return spring (8) returns to its initial position, at which point the clamping object is released.

[0058] ⑤ Continue to move the drive structure (2) in the reverse direction. After reaching the preset position, the recovery operation is completed.

[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions made by those skilled in the art within the scope of the technology disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automatic mechanism integrating clamping and riveting, characterized in that, It includes a ball screw (1), a drive structure (2), a cylinder (3), a rotating device (4), a push rod (5), a rivet core (6), a clamping sleeve (7), a return spring (8), a displacement sensor (9), and a pressure sensor (10). The drive structure (2) is connected to the ball screw (1), the cylinder (3) is connected to the drive structure (2), the cylinder (3) drives the rotating device (4) to move, the rivet core (6), the clamping sleeve (7) and the return spring (8) are connected to the rotating device (4), the drive device (2) drives the push rod (5) to move, the push rod (5) drives the rivet core (6) to move, the displacement sensor (9) is set between the drive structure (2) and the rotating device (4), and the pressure sensor (10) is set between the drive structure (2) and the push rod (5).

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