Dimpling method and dimpling device for runner surface of guide rail beam of aviation reverse thrust device

Abstract

The invention discloses a dimpling method and a dimpling device for a runner surface of a guide rail beam of an aviation reverse thrust device, the dimpling device mainly comprises a blower gun, a transmission device, an adapter, a clamp spring and a special dimpling drill, and a hexagonal rod on the adapter penetrates into a hexagonal hole in the transmission device for transmission between the transmission device and the adapter; and the adapter is locked by the clamp spring to prevent falling off, and then the special dimple drill is mounted on the adapter in a threaded connection manner. During dimple, the blower gun and the transmission device are held by a hand, so that the special dimple drill is stably and vertically fed. The dimpling device and method can adapt to a narrow space of a runner surface of a guide rail beam of an aviation reverse thrust device, interference is avoided, it is guaranteed that a counterbore is perpendicular to the runner surface after being machined, and further the flatness of a follow-up countersunk nail and the runner surface can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing of aviation products, and in particular is a countersinking device in a narrow space and a countersinking method for a flow channel surface of a guide rail beam of an aviation reverse thrust device. Background Art

[0002] like Figure 1 The figure shows a guide beam used in an aviation reverse thrust device. Due to the requirements of the engine structure, the guide beam parts have a complex structure and are special-shaped parts. It can be seen from the partial structure shown in the figure that the first curved surface 8 where the countersunk hole 6 is located forms an angle less than 90° with the adjacent second curved surface 7. When processing the countersunk hole 6, the axis of the hole needs to be perpendicular to the first curved surface 8, and the first curved surface 8 is the flow path surface of the airflow of the aviation reverse thrust device. After the countersunk nail is installed, its surface flatness is required to be high. Due to the limitation of the part structure, the use of ordinary countersink drills cannot meet the verticality requirements of the hole and the first curved surface 8, and after the countersunk nail is installed, the flatness of the nail head and the first curved surface 8 cannot be met. Due to the large size of the part and the large number of holes that need to be processed, if a reverse countersink drill (i.e., from Figure 1 The left side processing of the first curved surface 8 in the middle) requires two operators to cooperate with each other, and the countersink drill needs to be installed and disassembled once for each hole countersinking, which wastes manpower and a lot of time. Summary of the invention

[0003] The present invention aims to provide a countersinking method and countersinking device for the flow path surface of a guide rail beam of an aviation reverse thrust device, so as to overcome the technical bottleneck of the difficulty in processing the countersinking of the narrow space countersunk holes of special-shaped parts such as the guide rail beam of the aviation reverse thrust device. The countersinking device has the advantages of simple structure, convenient operation and high processing efficiency, and can meet the countersinking drilling processing of the above-mentioned guide rail beam, and after processing, the verticality requirements of the countersunk holes and the assembly flatness of the subsequent flow path surface are guaranteed.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] Countersinking device, comprising:

[0006] An air gun, the air gun being used as a power source to output torque;

[0007] A transmission device, wherein the input end of the transmission device is connected to the output end of the air gun, the output end of the transmission device outputs a torque, and the rotation axis of the torque is parallel to the rotation axis of the output torque of the air gun;

[0008] An adapter, a first end of which is connected to an output end of the transmission device;

[0009] A special countersink drill is connected to the second end of the adapter.

[0010] Furthermore, the transmission device is a gear box, which includes a plurality of gears with parallel rotating shafts and meshing with each other.

[0011] Furthermore, the output end of the transmission device includes an internal hexagonal structure, and the first end of the adapter is an external hexagonal structure.

[0012] Furthermore, a retaining spring is provided on the outer hexagonal structure of the adapter, and the outer hexagonal structure passes through the inner hexagonal hole structure of the transmission device and is limited on the transmission device by the retaining spring.

[0013] Furthermore, the special countersink drill is connected to the second end of the adapter through a thread.

[0014] Furthermore, the end of the special countersink drill is provided with a guide structure.

[0015] A method for countersinking the flow path surface of a guide rail beam of an aviation reverse thrust device, wherein the flow path surface is a first curved surface, a plurality of countersunk holes to be processed are arranged on the first curved surface, a second curved surface is arranged on one side of the first curved surface, and an angle between the first curved surface and the second curved surface is less than 90°, and the countersinking device with a guide structure using the above-mentioned special countersink drill is used, and comprises:

[0016] Step 1: Estimate the straight-line distance from the countersunk hole to be processed to the second curved surface along the axis direction of the countersunk hole to be processed, and determine the length of the special countersunk drill and the adapter according to the straight-line distance, ensuring that there is still a margin after deducting the length of the special countersunk drill and the adapter from the straight-line distance;

[0017] Step 2: estimate the length of the transmission device to ensure that the air gun connected to the input end of the transmission device does not interfere with the second curved surface during the feeding and withdrawal process of the special countersink drill, and the input end of the transmission device is located outside the space area surrounded by the first curved surface and the second curved surface;

[0018] Step three, placing the countersink device between the first curved surface and the second curved surface, and then using the guide structure on the special countersink drill to cooperate with the hole position where the countersink hole to be processed is located to send the special countersink drill into the hole position, and then according to the size of the angle between the first curved surface and the second curved surface, using the adapter as the rotating shaft, synchronously rotate the transmission device and the air gun so that the transmission device and the air gun are away from the second curved surface;

[0019] Step 4: Hold the end of the transmission device located outside the space area surrounded by the first curved surface and the second curved surface with one hand, and hold the air gun with the other hand and start the air gun to perform the countersinking operation.

[0020] Compared with the prior art, the present invention has the following characteristics:

[0021] 1. The countersinking device of the present invention solves the technical bottleneck problem of the difficulty in processing countersinks in narrow spaces of special-shaped parts such as guide rail beams, overcomes the interference problem caused by the second curved surface when countersinking from the first curved surface and the problem of poor verticality of the countersinking, and can be completed independently by one operator without the need for two operators to cooperate in reverse countersinking.

[0022] 2. The present invention introduces a transmission device, which moves the connection position between the countersink drill and the air gun in the direction away from the first curved surface, so that the transmission device can be held by hand during the countersinking operation, and a holding point is added. Since the holding point is closer to the countersink drill and the countersink position, the probability of the countersink drill swinging during feeding can be reduced, thereby improving the quality of the countersinking. In combination with the guide structure on the countersink drill, the verticality of the countersink and the flow channel surface after the final countersinking is ensured.

[0023] 3. The countersinking device has a simple structure, easy operation and high production efficiency. The transmission device adopts a gear box structure. The size of the gear box and the angle relative to the air gun can be adjusted according to parameters such as the position of the countersunk hole on the flow path surface, the angle between the second curved surface and the flow path surface, the length of the countersink drill and the adapter to ensure that there is no interference in the countersinking process. The countersinking drill speed can also be adjusted by changing the gear transmission ratio in the gear box to improve the countersinking efficiency and quality.

[0024] 4. Compared with the flexible shaft transmission, the gear box has better rigidity and is easier to hold. Its size and transmission ratio are more adjustable, which can ensure the verticality after countersinking and will not produce accidental swing like the flexible shaft. It is more suitable for countersinking occasions with high precision requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A partial schematic diagram of a guide beam used in an aviation reverse thrust device;

[0026] Figure 2 It is a schematic diagram of a small space countersinking device;

[0027] Figure 3 It is a schematic diagram of the state of countersinking using a countersinking device;

[0028] In the figure, 1-air gun, 2-transmission device, 3-adapter, 4-circlip, 5-special countersink drill, 6-countersink, 7-second curved surface, 8-first curved surface. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0030] like Figure 2 As shown, in this embodiment, a countersinking device for a narrow space is designed, which is mainly composed of an air gun 1, a transmission device 2, an adapter 3, a retaining ring 4, and a special countersink drill 5. The transmission device 2 and the adapter 3 are connected by a hexagonal rod on the adapter 3 penetrating into a hexagonal hole in the transmission device 2, and the retaining ring 4 is used to lock the adapter 3 to prevent it from falling off. The special countersink drill 5 is installed on the adapter 3 by threaded connection.

[0031] The transmission device 2 is a gear box. In this embodiment, the gear box includes three gears with parallel rotating shafts and meshing with each other, with a transmission ratio of 1. The input end of the gear box is connected to the air gun 1 through a transmission shaft, and the inner hole of the gear corresponding to the output end of the gear box is hexagonal, which cooperates with the hexagonal rod of the adapter 3. Figure 3 , the length of the gearbox

[0032] The end of the special countersink drill 5 has a guide structure, which is consistent with the inner contour of the countersink hole to be processed on the flow channel surface (first curved surface 8), so as to ensure the verticality during countersinking. After the verticality of the countersink and the flow channel surface is ensured by the guide structure of the special countersink drill 5, the nail head will also be perpendicular to the flow channel surface during subsequent nailing, so as to ensure the flatness of the nail head and the flow channel surface.

[0033] Before machining the countersunk hole 6, the countersinking device is selected as follows:

[0034] Step 1: Estimate the straight-line distance from the countersunk hole 6 to be processed to the second curved surface 7 along the axial direction of the countersunk hole 6 to be processed, and determine the length of the special countersunk drill 5 and the adapter 3 according to the straight-line distance, and ensure that there is still a margin after deducting the length of the special countersunk drill 5 and the adapter 3 from the straight-line distance, and the margin is used for feeding and exiting during countersunking;

[0035] Step 2: estimate the length of the transmission device 2 to ensure that the air gun 1 connected to the input end of the transmission device 2 does not interfere with the second curved surface 7 during the feeding and withdrawal process of the special countersink drill 5, and the input end of the transmission device 2 is located outside the space area surrounded by the first curved surface 8 and the second curved surface 7;

[0036] After the countersinking device is selected, assemble the countersinking device according to the following steps:

[0037] Step 1: Install the adapter 3 onto the transmission device 2 and lock the adapter 3 with the retaining spring 4.

[0038] Step 2: Install the special countersink drill 5 onto the adapter 3.

[0039] Step 3: Connect the air gun 1 to the air source.

[0040] After completing the above assembly, the countersunk hole 6 in the narrow space is countersunk. The specific process is as follows:

[0041] Step 1: Place the countersink device between the first curved surface 8 and the second curved surface 7, and then use the guide structure on the special countersink drill 5 to cooperate with the hole position where the countersunk hole 6 to be processed is located to send the special countersink drill 5 into the hole position, and then according to the size of the angle between the first curved surface 8 and the second curved surface 7, use the adapter 3 as the rotating shaft to synchronously rotate the transmission device 2 and the air gun 1 so that the transmission device 2 and the air gun 1 are away from the second curved surface 7, and ensure that there is enough space between the second curved surface 7 and the transmission device 2 after rotation for the hand to hold one end of the transmission device 2, such as Figure 3 As shown, the lower end of the transmission device 2 is used for holding during operation;

[0042] Step 2: Hold the transmission device 2 at one end outside the space area surrounded by the first curved surface 8 and the second curved surface 7 with one hand, and hold the air gun 1 with the other hand and start the air gun 1 to perform the countersinking operation.

[0043] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. Although the illustrative specific embodiments of the present invention are described above to facilitate the understanding of the present invention by the technical personnel in the field, it should be clear that the present invention is not limited to the scope of the specific embodiments. For ordinary technicians in the field of this technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. A countersinking device, characterized in that: include: An air gun (1), the air gun (1) being used as a power source to output torque; A transmission device (2), wherein the input end of the transmission device (2) is connected to the output end of the air gun (1), the output end of the transmission device (2) outputs a torque, and the rotation axis of the torque is parallel to the rotation axis of the output torque of the air gun (1); An adapter (3), a first end of the adapter (3) being connected to an output end of the transmission device (2); A special countersink drill (5), wherein the special countersink drill (5) is connected to the second end of the adapter (3).

2. A countersinking device according to claim 1, characterized in that: The transmission device (2) is a gear box, which includes a plurality of gears with parallel rotating shafts and meshing with each other.

3. A countersinking device according to claim 1, characterized in that: The output end of the transmission device (2) comprises an internal hexagonal hole structure, and the first end of the adapter (3) is an external hexagonal structure.

4. A countersinking device according to claim 3, characterized in that: A retaining spring (4) is also provided on the outer hexagonal structure of the adapter (3); the outer hexagonal structure penetrates through the inner hexagonal hole structure of the transmission device (2) and is limited on the transmission device (2) via the retaining spring (4).

5. A countersinking device according to claim 1, characterized in that: The special countersink drill (5) is connected to the second end of the adapter (3) via a thread.

6. A countersinking device according to claim 1, characterized in that: The end of the special countersink drill (5) is provided with a guide structure.

7. A method for countersinking the flow path surface of a guide rail beam of an aviation reverse thrust device, wherein the flow path surface is a first curved surface (8), a plurality of countersunk holes (6) to be processed are disposed on the first curved surface (8), a second curved surface (7) is disposed on one side of the first curved surface (8), and an angle between the first curved surface (8) and the second curved surface (7) is less than 90°, characterized in that: The countersinking device according to claim 6 is used, and comprises: Step 1: Estimate the straight-line distance from the countersunk hole (6) to be processed to the second curved surface (7) along the axial direction of the countersunk hole (6) to be processed, and determine the length of the special countersunk drill (5) and the adapter (3) according to the straight-line distance, so as to ensure that there is still a margin after deducting the length of the special countersunk drill (5) and the adapter (3) from the straight-line distance; Step 2: estimating the length of the transmission device (2) to ensure that the air gun (1) connected to the input end of the transmission device (2) does not interfere with the second curved surface (7) during the feeding and withdrawal process of the special countersink drill (5), and the input end of the transmission device (2) is located outside the space area surrounded by the first curved surface (8) and the second curved surface (7); Step three, placing the countersink device between the first curved surface (8) and the second curved surface (7), and then using the guide structure on the special countersink drill (5) to cooperate with the hole position where the countersunk hole (6) to be processed is located to send the special countersink drill (5) into the hole position, and then according to the size of the angle between the first curved surface (8) and the second curved surface (7), using the adapter (3) as the rotation axis, synchronously rotating the transmission device (2) and the air gun (1), so that the transmission device (2) and the air gun (1) are away from the second curved surface (7); Step 4: With one hand, hold the transmission device (2) at one end outside the space area surrounded by the first curved surface (8) and the second curved surface (7), and with the other hand, hold the air gun (1) and start the air gun (1) to perform countersinking operation.

Images