A corner connection tool and its usage method

Abstract

The present invention provides a corner-type connection tool and a method for using the same. The tool includes a tool body, and the tool body includes a through rod connection part, a pull gun connection part, and an L-shaped connection part. The through rod connection part and the pull gun connection part are respectively fixedly connected to two ends of the L-shaped connection part. The included angle α between the through rod connection part and the pull gun connection part is 90° to 120°. A through hole in the shape of an L is formed in the tool body and sequentially penetrates through the through rod connection part, the pull gun connection part, and the L-shaped connection part, and a corner-type transmission assembly is arranged in the through hole. The tool of the present invention is mainly used as a connection tool between a power source and a moving part, can perform steering transmission on the power of the power source, and further change the moving direction of the moving part, can reduce the interference received by the moving part, and the overall structure of the present invention is simple and reasonable. When combined with the power source and the moving part, the connection and disassembly operations are simple, and it is convenient to carry.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining, and particularly relates to a corner connection tool and a using method thereof. Background Art

[0002] In modern fields such as aviation, aerospace vehicles, and high-speed trains, there is an increasing demand for the anti-fatigue performance of structures under high-frequency and low-frequency vibration conditions. The holes in these parts are the main fatigue initiation sites. Therefore, strengthening these basic holes is a common countermeasure.

[0003] In the prior art, the commonly used method for strengthening basic holes is to install a backing plate or a bushing in the basic hole. During this process, a pull gun is required for installation and disassembly. However, for basic holes with a narrow axial clearance, interference occurs between the surrounding obstacles and the gun head of the pull gun, and the basic hole strengthening operation cannot be carried out only by the common method. Therefore, there is an urgent need for a basic hole strengthening method that can adapt to small axial clearances. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a corner connection tool aiming at the deficiencies of the above-mentioned prior art. As a connection tool between a power source and a moving part, this tool can transmit the power of the power source in a turned direction, thereby changing the moving direction of the moving part, reducing the interference on the moving part, and having a simple and reasonable structure, being flexible and convenient to use, and suitable for popularization. At the same time, a using method of this corner connection tool is provided, which is applied to the scenario of strengthening basic holes with small axial clearances.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: a corner connection tool, including a tool body, the tool body includes a through rod connection part, a pull gun connection part, and an L-shaped connection part. The through rod connection part and the pull gun connection part are respectively fixedly connected to both ends of the L-shaped connection part. The included angle α between the through rod connection part and the pull gun connection part is 90° to 120°. A through hole in an L shape is opened in the tool body and sequentially penetrates through the through rod connection part, the pull gun connection part, and the L-shaped connection part. A corner transmission component is arranged in the through hole.

[0006] Preferably, the corner transmission component includes a muzzle fixing sleeve, a gun core connecting rod, a pull rod, a chain, and a through rod joint. The chain is located in the L-shaped connection part. One end of the pull rod is rotatably connected to the chain and is located in the pull gun connection part. The gun core connecting rod is fixedly connected to the other end of the pull rod. The through rod joint is rotatably connected to the chain and is located in the through rod connection part. The muzzle fixing sleeve is rotatably connected to the pull gun connection part.

[0007] Preferably, the gun core connecting rod is provided with an external thread, the muzzle fixing sleeve is provided with an internal thread, and the through rod joint is provided with an internal thread.

[0008] Preferably, a connecting pipe is provided at the end of the pulling gun connecting portion, the gun core connecting rod is inserted through the connecting pipe, the muzzle fixing sleeve is sleeved on the connecting pipe, an annular groove is formed in the muzzle fixing sleeve, a sealing ring and a washer are embedded in the annular groove, an embedding groove is formed in the connecting pipe, and a retaining ring is embedded in the embedding groove.

[0009] Preferably, a limiting groove is formed in the pulling gun connecting portion, a limiting block is sleeved on the gun core connecting rod, and the limiting block is slidably embedded in the limiting groove.

[0010] Preferably, a nose top joint sleeved on the through rod joint is provided at the port of the through rod connecting portion.

[0011] Preferably, a rotating shaft is rotatably installed at the corner of the L-shaped connecting portion, and a roller is sleeved on the rotating shaft.

[0012] A method for using a corner-type connecting tool, which uses the corner-type connecting tool as a connecting tool between a power source and a moving part, so as to install a reinforcing part in a small axial clearance basic hole and strengthen the basic hole, includes the following steps:

[0013] S1. A basic hole is formed in the base material;

[0014] S2. Connect the corner-type connecting tool with a pulling gun as the power source, connect a mandrel as the moving part with the corner-type connecting tool, connect a nose top cap through the mandrel with the corner-type connecting tool, insert the reinforcing part into the basic hole or sleeve it on the mandrel, insert the mandrel into the basic hole, start the pulling gun, pull the mandrel out of the basic hole, and extrude and strengthen the base material around the basic hole;

[0015] S3. Ream the inner hole of the reinforcing part to the required inner diameter size to complete the strengthening.

[0016] The present invention has the following advantages compared with the prior art:

[0017] 1. The tool described in the present invention is mainly used as a connecting tool between a power source and a moving part, can transmit the power of the power source in a steering manner, and then change the moving direction of the moving part, and can reduce the interference received by the moving part.

[0018] 2. The overall structure of the tool described in the present invention is simple and reasonable. When combined with the power source and the moving part, the connection and disassembly operations are simple, and it is convenient to carry.

[0019] The present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the mandrel of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the nasal top cap A of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the nasal top cap B of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the disassembly component A of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the disassembly component B of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the pulling gun of the present invention.

[0026] Figure 7 It is a three-dimensional schematic diagram of the corner-type connecting tool of the present invention.

[0027] Figure 8 It is a schematic internal structure diagram of the corner-type connecting tool of the present invention.

[0028] Figure 9 It is an attachment of the present invention Figure 8 Enlarged view of the structure at the circle S in the figure.

[0029] Figure 10 It is a schematic installation diagram of no riveting support plate on the small axial clearance basic hole in Embodiment 1.

[0030] Figure 11 It is a schematic disassembly diagram of no riveting support plate on the small axial clearance basic hole in Embodiment 1.

[0031] Figure 12 It is a schematic installation diagram of no riveting support plate on the extremely small axial clearance basic hole in Embodiment 2.

[0032] Figure 13 It is a schematic disassembly diagram of no riveting support plate on the extremely small axial clearance basic hole in Embodiment 2.

[0033] Figure 14 It is a schematic installation diagram of a straight-through bushing on the small axial clearance basic hole in Embodiment 3.

[0034] Figure 15 It is a schematic disassembly diagram of a straight-through bushing on the small axial clearance basic hole in Embodiment 3.

[0035] Figure 16 It is a schematic installation diagram of a straight-through bushing on the extremely small axial clearance basic hole in Embodiment 4.

[0036] Figure 17 It is a schematic disassembly diagram of a straight-through bushing on the extremely small axial clearance basic hole in Embodiment 4.

[0037] Description of the reference numerals:

[0038] 1 - Connecting rod; 2 - Extrusion head; 201 - Extrusion ring; 4 - Pulling gun; 401 - Handle; 402 - Sleeve;

[0039] 403 - Sliding seat; 404 - Gun core; 405 - Socket; 406 - Compressed air cavity; 407 - Hydraulic oil cavity; 408 - Pneumatic piston; 409 - Hydraulic oil piston; 410 - Compressed air pipeline; 411 - Hydraulic oil pipeline; 412 - Control button; 5 - Demounting ring; 6 - Demounting cover; 7 - Nose top seat; 8 - Nose top head; 9 - Connecting rod connection part; 10 - Pulling gun connection part; 11 - L-shaped connection part; 12 - Perforation; 13 - Muzzle fixing

[0040] Sleeve; 14 - Gun core connecting rod; 15 - Pull rod; 16 - Chain; 17 - Connecting rod joint; 18 - Rotating shaft; 19 - Drum; 20 - Limit groove; 21 - Limit block; 22 - Connecting pipe; 23 - Annular groove; 24 - Sealing ring; 25 - Washer; 26 - Embedded groove; 27 - Retaining ring; 28 - Nose top joint; 29 - Tool body; 30 - Rivetless support

[0041] Plate; 31 - Slotted lining; 32 - Straight bushing. Detailed implementation mode

[0042] As Figures 7 to 9 shown, the present invention provides a corner connection tool. The corner connection tool includes a tool body 29, and the tool body 29 includes a connecting rod connection part 9, a pulling gun connection part 10 and an L-shaped connection part 11. The connecting rod connection part 9 and the pulling gun connection part 10 are respectively fixedly connected to both ends of the L-shaped connection part 11. Preferably, the connecting rod connection part 9, the L-shaped connection part 11 and the pulling gun connection part 10 are integrally formed. The included angle α between the connecting rod connection part 9 and the pulling gun connection part 10 is 90° to 120°. A perforation 12 in the shape of an L is opened in the tool body 29 and sequentially penetrates through the connecting rod connection part 9, the pulling gun connection part 10 and the L-shaped connection part 11. A corner transmission assembly is arranged in the perforation 12.

[0043] The corner transmission assembly includes a muzzle fixing sleeve 13, a gun core connecting rod 14, a pull rod 15, a chain 16 and a connecting rod joint 17. Among them, the chain 16 is located in the L-shaped connection part 11. One end of the pull rod 15 is rotatably connected to the chain 16 through a pin shaft and is located in the pulling gun connection part 10. The gun core connecting rod 14 is fixedly connected to the other end of the pull rod 15. The connecting rod joint 17 is rotatably connected to the chain 16 through a pin shaft and is located in the connecting rod connection part 9. The muzzle fixing sleeve 13 is rotatably connected to the pulling gun connection part 10,

[0044] Preferably, the gun core connecting rod 14 is provided with an external thread, the muzzle fixing sleeve 13 is provided with an internal thread, the gun core connecting rod 14 and the muzzle fixing sleeve 13 are used to connect to the power source, the through rod joint 17 is provided with an internal thread, and is used to connect to the moving part, so as to realize the steering transmission of the power of the power source and change the moving direction of the moving part.

[0045] In some examples, a rotating shaft 18 is rotatably installed at the corner of the L-shaped connecting part 11, a roller 19 is sleeved on the rotating shaft 18, the roller 19 can support the chain 16 and can rotate along with the movement of the chain 16, making the whole movement transmission smoother and also extending the service life of the corner connection tool.

[0046] In some examples, a limiting groove 20 is formed in the pulling gun connecting part 10, a limiting block 21 is sleeved on the gun core connecting rod 14, and the limiting block 21 is slidably embedded in the limiting groove 20. The cooperation between the limiting groove 20 and the limiting block 21 can limit the movement distance of the gun core connecting rod 14 and prevent the corner transmission component from sliding out of the tool body.

[0047] In some examples, a connecting pipe 22 is arranged at the end of the pulling gun connecting part 10, the gun core connecting rod 14 is arranged through the connecting pipe 22, the muzzle fixing sleeve 13 is sleeved on the connecting pipe 22, an annular groove 23 is formed in the muzzle fixing sleeve 13, a sealing ring 24 and a washer 25 are embedded in the annular groove 23, an embedding groove 26 is formed in the connecting pipe 22, and a retaining ring 27 is embedded in the embedding groove 26. The retaining ring 27 can limit the washer 25 and the sealing ring 24 to prevent them from falling off.

[0048] In some examples, a nose top joint 28 sleeved on the through rod joint 17 is arranged at the port of the through rod connecting part 9, and an external thread is machined on the nose top joint 28.

[0049] The present invention also provides a using method of the corner connection tool, wherein the corner connection tool is used to assist in the installation and disassembly of the reinforcement on the small axial clearance basic hole, so as to strengthen the basic hole. In Embodiments 1-4, the specific working methods of the corner connection tool in four scenarios of disassembling and assembling the non-riveted pallet nut on the small axial clearance basic hole, disassembling and assembling the non-riveted pallet nut on the extremely small axial clearance basic hole, disassembling and assembling the straight-through bushing on the small axial clearance basic hole, and disassembling and assembling the straight-through bushing on the extremely small axial clearance basic hole are respectively given.

[0050] As Figures 1 to 6 shown, in these application scenarios, the equipment used for installation is: a mandrel, a corner connection tool, a nose top cap and a pulling gun, wherein the mandrel is the moving part and the pulling gun is the power source; the equipment used for disassembly is: a corner connection tool, a pulling gun, a nose top cap and a disassembly component, wherein the disassembly component is the moving part and the pulling gun is the power source.

[0051] Specifically, the mandrel includes a connecting rod 1 and an extrusion head 2. External threads are provided at both ends of the connecting rod 1. A connecting hole with an internal thread is machined on the connecting side of the extrusion head 2, and the outer diameter of this side gradually decreases to be equal to the outer diameter of the connecting rod 1. The connecting hole of the extrusion head 2 is connected to the external thread at one end of the connecting rod, and the external thread at the other end of the connecting rod is used to connect to the internal thread on the rod joint 17. An extrusion ring 201 for extrusion strengthening is provided in the middle of the extrusion head 2, and a chamfer is provided at the other end of the extrusion head 2.

[0052] Preferably, the pulling gun 4 is an automatic pulling gun. The automatic pulling gun includes a handle 401, a sleeve 402, a sliding seat 403, and a gun core 404. One end of the gun core 404 is fixedly connected to the sliding seat 403, and a socket 405 is provided at the other end. An internal thread is machined in the socket 405 for connecting to the external thread on the gun core connecting rod 14 in the angled connecting tool. External threads are provided at the open end of the sleeve 402, i.e., the muzzle, for connecting to the internal thread on the muzzle fixing sleeve 13. A compressed air inner cavity 406 and a hydraulic oil inner cavity 407 are provided in the sliding seat 403. A pneumatic piston 408 and a hydraulic oil piston 409 are provided in the sleeve 402. The pneumatic piston 408 is inserted into the compressed air inner cavity 406, and the hydraulic oil piston 409 is inserted into the hydraulic oil inner cavity 407. The pneumatic piston 408 and the hydraulic oil piston 409 move in opposite directions. The pneumatic piston 408 is connected to a compressed air pipeline 410, and the hydraulic oil piston 409 is connected to a hydraulic oil pipeline 411. Sealing treatments are performed at the connection between the pneumatic piston 408 and the compressed air pipeline 410 and at the connection between the hydraulic oil piston 409 and the hydraulic oil pipeline 411. A control button 412 for controlling the flow and disconnection of the compressed air in the compressed air pipeline 410 is installed on the handle 401.

[0053] The working principle of the automatic pulling gun is as follows: When the user presses the control button 412, the flow of compressed air in the compressed air pipeline 410 is disconnected. At the same time, hydraulic oil enters the hydraulic oil inner cavity 407 in the sliding seat 403, pushing the sliding seat 403 to move into the sleeve 402. When the user releases the control button 412, the flow of compressed air in the compressed air pipeline 410 starts, the hydraulic oil is pressed back into the hydraulic oil pipeline 411, and compressed air enters the compressed air inner cavity 406 in the sliding seat 403, pushing the sliding seat 403 to move out of the sleeve 402.

[0054] The disassembly assembly includes disassembly assembly A and disassembly assembly B. Disassembly assembly A includes a disassembly ring 5 and a connecting through rod 1. A threaded hole is provided at the center of the disassembly ring 5, and one end of the connecting through rod 1 is inserted into the threaded hole by means of threaded fit. The outer diameter of the disassembly ring 5 is between the inner and outer diameters of the bushing to be disassembled. Disassembly assembly B includes a disassembly cover 6 and a connecting through rod 1. The disassembly cover 6 is a housing with a cavity. One side of the housing is an opening, and an internal threaded mounting hole is provided on the other side of the housing based on the center line of the cavity. The connecting through rod 1 can pass through the cavity and be threadedly connected to the disassembly cover 6.

[0055] The connecting through rod in the disassembly assembly is the same as that in the mandrel.

[0056] Specifically, the nose top cap includes nose top cap A and nose top cap B. Nose top cap A includes a nose top seat 7, and an internal thread is machined in the nose top seat 7 for connection with the nose top joint 28. Nose top cap B includes a nose top seat 7 and a nose top head 8. An internal thread is machined in the nose top seat 7 for connection with the external thread on the nose top joint 28. The inner and outer diameter dimensions of the nose top 8 head are between the inner and outer diameter dimensions of the straight cylinder end of the non-riveted bracket 30.

[0057] It should be noted that in the present invention:

[0058] The distance from the left end of the basic hole to the nearest obstacle is defined as: forward clearance;

[0059] The distance from the right end of the basic hole to the nearest obstacle is defined as: reverse clearance;

[0060] The distance from the center line of the basic hole to the upper obstacle is: upper end clearance;

[0061] The distance from the center line of the basic hole to the lower obstacle is: lower end clearance.

[0062] The axial clearance of the basic hole includes forward clearance and reverse clearance, and when both the forward clearance and reverse clearance of the basic hole do not exceed 100 mm, the basic hole is defined as a basic hole with a small axial clearance.

[0063] Embodiment 1

[0064] As Figure 10 、 Figure 11 shown, this embodiment provides the application of this corner connection tool during the installation and disassembly of the reinforcement on the basic hole with a small axial clearance;

[0065] Select a non-riveted bracket nut as the reinforcement;

[0066] Among them, the installation method includes the following steps:

[0067] S1. Open a hole in the base material. Optionally, the base material is made of aluminum alloy or titanium alloy;

[0068] The forward clearance and backward clearance of the obtained hole are both 100 mm, the upper-end clearance is 70 mm, and the lower-end clearance is not restricted;

[0069] The specific operation is as follows:

[0070] S101. Initial drilling: Drill a pilot hole in the base material;

[0071] S102. Initial reaming: Perform initial reaming on the pilot hole according to the required size and surface finish requirements;

[0072] S103. Inspection: Insert the go and no-go ends of the combined gauge into the pilot hole. The go end can pass, and the no-go end cannot pass, indicating that the pilot hole passes the inspection. Use a mandrel ring gauge to inspect the extrusion head 2 of the mandrel. The extrusion head 2 cannot pass through the mandrel ring gauge, indicating that the mandrel extrusion head 2 passes the inspection; otherwise, replace it.

[0073] After initial drilling or initial reaming, the size of the basic hole is 10.417 - 10.479 mm. Correspondingly, a non-riveted backing plate with an inner diameter of 8 mm is selected;

[0074] Select a corner-type connection tool with an angle α of 120° between the through-bar connection part 9 and the pull gun connection part 10.

[0075] S2. Combine the mandrel, corner-type connection tool, nose top cap A, and pull gun 4. Specifically: Combine the mandrels, sleeved the slotted inner liner 31 on the combined mandrel, connect the connecting through-bar 1 with the through-bar joint 17, pass the nose top cap A through the mandrel and connect it with the nose top joint 28, so that the slotted inner liner 31 presses against the nose top seat 7. Then connect the gun core connecting rod 14 with the gun core 404 of the pull gun 4, and rotate the muzzle fixing sleeve 13 so that the muzzle fixing sleeve 13 is connected to the open end of the sleeve 402.

[0076] S3. Insert the straight barrel end of the non-riveted backing plate 30 into the basic hole, and then insert the combined body of the slotted inner liner 31 and the mandrel into the non-riveted backing plate 30, so that the non-riveted backing plate 30 and the pull gun 4 are located on the same side or both sides of the basic hole, and make the nose top seat 7 closely and steadily adhere to the surface of the basic hole or the non-riveted backing plate 30. Then start the pull gun 4, pull the mandrel, so that the extrusion head 2 of the mandrel is gradually pulled away from the basic hole, and the slotted inner liner 31 is expanded by extrusion, so that the non-riveted backing plate 30 has a high interference fit with the base material, and the non-riveted backing plate 30 is fixedly installed in the basic hole, while the slotted inner liner 31 remains in the non-riveted backing plate 30.

[0077] It should be noted that the slotted inner liner 31 extends 3 - 4 mm out of the barrel part of the non-riveted backing plate 30. After the pull gun 4 is started and before the extrusion head 2 is pulled away from the basic hole, the control button 412 shall not be released.

[0078] S3. Remove the slotted inner liner 31 from the non-riveted backing plate 30, insert the go end of the combined gauge into the inner hole of the non-riveted backing plate 30. The go end can pass, indicating that the inner hole passes the inspection; otherwise, re-extrude the inner hole.

[0079] It should be noted that a new slotted lining 31 must be used when the secondary extrusion non-riveted retainer plate 30 is performed.

[0080] S3. Ream the inner hole of the non-riveted retainer plate 30 to the required inner diameter dimension, and then install the nut plate on the non-riveted retainer plate 30 to complete the installation of the nut of the non-riveted retainer plate 30.

[0081] The disassembly steps of the non-riveted retainer plate nut on the small axial clearance basic hole are as follows:

[0082] Select a corner connection tool with an included angle α of 120° between the through rod connection part 9 and the pull gun connection part 10.

[0083] S1. Select the disassembly component B and the nose top cap B, remove the nut plate from the non-riveted retainer plate 30, then cover the disassembly cover 6 on the side of the non-riveted retainer plate 30 where the nut plate is installed. After that, connect one end of the connecting through rod 1 to the corner connection tool, and pass the nose top cap B through the connecting through rod 1 to make the nose top seat 7 connect with the nose top joint 28. Subsequently, insert the other end of the connecting through rod 1 through the inner hole of the non-riveted retainer plate 30 and connect it to the disassembly cover 6.

[0084] S2. Start the pull gun 4, and push the non-riveted retainer plate 30 out of the bottom hole through the nose top head 8 to complete the disassembly of the non-riveted retainer plate 30;

[0085] It should be noted that the outer diameter of the nose top head 8 is between the inner diameter and the outer diameter of the straight cylinder end of the non-riveted retainer plate 30, and the control button 412 shall not be released before the non-riveted retainer plate 30 is pulled away from the basic hole after the pull gun 4 is started.

[0086] Embodiment 2

[0087] Such as Figure 12 、 Figure 13 As shown, this embodiment provides the application of the corner connection tool in the installation and disassembly process of the reinforcement on the extremely small axial clearance basic hole.

[0088] Select the non-riveted retainer plate nut as the reinforcement;

[0089] Among them, the installation method includes the following steps:

[0090] S1. Drill a hole in the base material. Optionally, the base material is made of aluminum alloy or titanium alloy;

[0091] The positive clearance and the back clearance of the obtained hole are both 75 mm, the upper clearance is 70 mm, and the lower clearance is not limited;

[0092] The specific operation is as follows:

[0093] S101. Initial drilling: Drill the bottom hole of the base material;

[0094] S102. Initial reaming: Ream the bottom hole initially according to the required dimensions and surface finish requirements.

[0095] S103. Inspection: Insert the go and no-go ends of the combination gauge into the bottom hole. The go end can pass through, and the no-go end cannot pass through, indicating that the bottom hole passes the inspection. Use a mandrel ring gauge to inspect the extrusion head 2 of the mandrel. If the extrusion head 2 cannot pass through the mandrel ring gauge, the mandrel extrusion head 2 passes the inspection; otherwise, replace it.

[0096] The size of the basic hole after initial drilling or reaming is: 10.417 - 10.479 mm. Correspondingly, select a non-riveted backing plate with an inner diameter of 8 mm.

[0097] Select a corner connection tool with an angle α of 90° between the through rod connection part 9 and the pull gun connection part 10.

[0098] S2. Combine the mandrel, corner connection tool, nose top cap A, and pull gun 4. Specifically: Combine the mandrels, sleeved the slotted inner liner 31 on the combined mandrel, connect the connecting through rod 1 with the through rod joint 17, pass the nose top cap A through the mandrel and connect it with the nose top joint 28, so that the slotted inner liner 31 presses against the nose top seat 7. Then connect the gun core connecting rod 14 with the gun core 404 of the pull gun 4, and rotate the muzzle fixing sleeve 13 so that the muzzle fixing sleeve 13 is connected to the open end of the sleeve 402.

[0099] S3. Insert the straight barrel end of the non-riveted backing plate 30 into the basic hole, and then insert the combined body of the slotted inner liner 31 and the mandrel into the non-riveted backing plate 30, so that the non-riveted backing plate 30 and the pull gun 4 are located on the same side or both sides of the basic hole, and make the nose top seat 7 closely adhere to the surface of the basic hole or the non-riveted backing plate 30 smoothly. Then start the pull gun 4 and pull the mandrel, so that the extrusion head 2 of the mandrel is gradually pulled away from the basic hole, and the slotted inner liner 31 is extruded and expanded, so that the non-riveted backing plate 30 has a high interference fit with the base material, and the non-riveted backing plate 30 is fixedly installed in the basic hole, while the slotted inner liner 31 remains in the non-riveted backing plate 30.

[0100] It should be noted that the slotted inner liner 31 extends 3 mm to 4 mm from the barrel part of the non-riveted backing plate 30. After the pull gun 4 is started and before the extrusion head 2 is pulled away from the basic hole, the control button 412 shall not be released.

[0101] S3. Remove the slotted inner liner 31 from the non-riveted backing plate 30, insert the go end of the combination gauge into the inner hole of the non-riveted backing plate 30. If the go end can pass through, the inner hole passes the inspection; otherwise, re-extrude the inner hole.

[0102] It should be noted that a new slotted inner liner 31 must be used when re-extruding the non-riveted backing plate 30 for the second time.

[0103] S4. Ream the inner hole of the non-riveted backing plate 30 to the required inner diameter size, and then install the nut plate on the non-riveted backing plate 30 to complete the installation of the non-riveted backing plate nut.

[0104] The disassembly steps of the non-riveted backing nut on the base hole with a minimum axial clearance are as follows:

[0105] Select a corner connection tool with an angle α of 90° between the connecting part 9 of the through rod and the connecting part 10 of the pulling gun.

[0106] S1. Select the disassembly component B and the nose cap B, remove the nut plate from the non-riveted backing plate 30, then cover the disassembly cover 6 on the side of the non-riveted backing plate 30 where the nut plate is installed. After that, connect one end of the connecting through rod 1 to the corner connection tool, and pass the nose cap B through the connecting through rod 1 so that the nose seat 7 is connected to the nose joint 28. Subsequently, insert the other end of the connecting through rod 1 through the inner hole of the non-riveted backing plate 30 and connect it to the disassembly cover 6.

[0107] S2. Start the pulling gun 4 and push the non-riveted backing plate 30 out of the bottom hole through the nose tip 8 to complete the disassembly of the non-riveted backing plate 30.

[0108] It should be noted that the nose cap B is tightly pressed against the base material, the outer diameter of the nose tip is between the inner diameter and the outer diameter of the straight cylinder end of the non-riveted backing plate, and the control button shall not be released before the non-riveted backing plate is pulled away from the base hole after the pulling gun is started.

[0109] Embodiment 3

[0110] Such as Figure 14 、 Figure 15 As shown, this embodiment provides the application of this corner connection tool in the installation and disassembly of the reinforcement on the base hole with a small axial clearance.

[0111] Select a straight-through bushing as the reinforcement;

[0112] Among them, the installation method includes the following steps:

[0113] S1. Drill a hole in the base material. Optionally, the base material is a carbon fiber composite material;

[0114] The forward clearance and the backward clearance of the obtained hole are both 100 mm, the upper-end clearance is 70 mm, and the lower-end clearance is not limited;

[0115] The specific operation is as follows:

[0116] S101. Initial drilling: Drill the bottom hole of the base material;

[0117] S102. Initial reaming: Ream the bottom hole according to the required size and surface finish requirements;

[0118] S103. Inspection: Insert the through and non-through ends of the combined gauge into the bottom hole. The through end can pass, and the non-through end cannot pass, indicating that the bottom hole inspection is qualified. Use the mandrel ring gauge to inspect the extrusion head 2 of the mandrel. The extrusion head 2 cannot pass through the mandrel ring gauge, indicating that the mandrel extrusion head 2 inspection is qualified. Otherwise, replace it;

[0119] The size of the basic hole after initial drilling or initial reaming is: 35.281 - 35.297 mm. Correspondingly, a straight-through bushing with an inner diameter of 30 mm and a wall thickness of 3 mm is selected.

[0120] A corner connection tool with an included angle α of 120° between the connecting rod connecting part and the pull gun connecting part is selected.

[0121] S2. Combine the mandrel, the corner connection tool, the nose top cap A and the pull gun 4. Specifically: Combine the mandrels, set the straight-through bushing 32 on the combined mandrel, connect the connecting rod 1 with the rod joint 17, pass the nose top cap A through the mandrel and connect it with the nose joint 28, make the straight-through bushing 32 press against the nose top seat 7, then connect the gun core connecting rod 14 with the gun core 404 of the pull gun 4, and rotate the muzzle fixing sleeve 13 so that the muzzle fixing sleeve 13 is connected to the open end of the sleeve 402.

[0122] S3. Insert the straight-through bushing 32 and mandrel assembly into the basic hole, so that the extrusion head 2 of the mandrel and the pull gun 4 are respectively on both sides of the basic hole, and make the nose top seat 7 closely adhere to the surface of the basic hole. Then start the pull gun 4, pull the mandrel, so that the extrusion head 2 of the mandrel is gradually pulled away from the basic hole, the straight-through bushing 32 is extruded and expanded, and has a high interference fit with the base material and remains in the basic hole.

[0123] The extrusion amount of the basic hole does not exceed 2%.

[0124] It should be noted that after the pull gun 4 is started, before the extrusion head 2 is pulled away from the basic hole, the control button 412 shall not be released.

[0125] S4. Ream the straight-through bushing 32 to the required inner diameter size to complete the installation of the straight-through bushing 32.

[0126] The disassembly steps of the straight-through bushing on the basic hole with a small axial clearance are as follows:

[0127] A corner connection tool with an included angle α of 120° between the connecting rod connecting part 9 and the pull gun connecting part 10 is selected.

[0128] S1. Select the disassembly component A and the nose top cap A. Connect one end of the connecting rod 1 to the corner connection tool, pass the nose top cap A through the connecting rod 1, connect the nose top seat 7 with the nose joint 28, then insert the other end of the connecting rod 1 through the straight-through bushing 32 and connect it with the disassembly ring 5, so that the disassembly ring 5 and the pull gun 4 are respectively on both sides of the basic hole, and make the disassembly ring 5 closely adhere to the surface of the basic hole.

[0129] S2. Start the pull gun 4, and push out the straight-through bushing 32 from the bottom hole through the disassembly ring 5 to complete the disassembly of the straight-through bushing 32.

[0130] It should be noted that the A nose top cap is pressed tightly against the base material. The outer diameter of the disassembly ring 5 should be between the inner diameter and the outer diameter of the straight-through bushing 32, and the control button 412 should not be released before the straight-through bushing 32 is pulled away from the base hole after the pulling gun is started.

[0131] Embodiment 4

[0132] As Figure 16 、 Figure 17 shown, this embodiment provides the application of this corner connection tool during the installation and disassembly of the reinforcement on the base hole with an extremely small axial clearance.

[0133] Select a straight-through bushing as the reinforcement;

[0134] Among them, the installation method includes the following steps:

[0135] S1. Drill a hole in the base material. Optionally, the base material is a carbon fiber composite material;

[0136] The forward clearance and the backward clearance of the obtained hole are both 75 mm, the upper end clearance is 70 mm, and the lower end clearance is not restricted;

[0137] The specific operation is as follows:

[0138] S101. Initial drilling: Drill the base hole of the base material;

[0139] S102. Initial reaming: Ream the base hole according to the required size and surface finish requirements;

[0140] S103. Inspection: Insert the through and non-through ends of the combined gauge into the base hole. The through end can pass, and the non-through end cannot pass, indicating that the base hole inspection is qualified. Use the core rod ring gauge to inspect the extrusion head 2 of the core rod. The extrusion head 2 cannot pass through the core rod ring gauge, indicating that the core rod extrusion head 2 is qualified. Otherwise, replace it;

[0141] The size of the base hole after initial drilling or initial reaming is: 35.281 - 35.297 mm. Correspondingly, select a straight-through bushing with an inner diameter of 30 mm and a wall thickness of 3 mm;

[0142] Select a corner connection tool with an included angle α of 90° between the through rod connection part and the pulling gun connection part.

[0143] S2. Combine the core rod, the corner connection tool, the nose top cap A, and the pulling gun. Specifically: Combine the core rod, set the straight-through bushing 32 on the combined core rod, connect the connecting through rod 1 with the through rod joint 17, pass the nose top cap A through the core rod and connect it with the nose top joint 28, so that the straight-through bushing 32 presses against the nose top seat 7. Then connect the gun core connecting rod 14 with the gun core 404 of the pulling gun 4, and rotate the muzzle fixing sleeve 13 so that the muzzle fixing sleeve 13 is connected to the open end of the sleeve 402.

[0144] S3, insert the straight bushing 32 and the mandrel assembly into the base hole, so that the extrusion head 2 and the pulling gun 4 of the mandrel are respectively located on both sides of the base hole, and the nose top seat 7 is stably and tightly attached to the surface of the base hole, and then start the pulling gun 4 to pull the mandrel, so that the extrusion head 2 of the mandrel is gradually pulled away from the base hole, and the straight bushing 32 is squeezed and expanded, and a high interference fit is generated with the base material and retained in the base hole;

[0145] The extrusion of the base hole does not exceed 2%;

[0146] It should be noted that after the pulling gun 4 is started, the control button 412 must not be released before the extrusion head 2 is pulled away from the base hole.

[0147] S4, finally ream the straight bushing 32 to the required inner diameter size, and complete the installation of the straight bushing 32.

[0148] The steps for removing the through bushing on the base hole with minimal axial clearance are as follows:

[0149] An angle connection tool is selected in which the angle α between the through rod connection part 9 and the pulling gun connection part 10 is 90°.

[0150] S1. Select the disassembly assembly A and the nose cap A, connect one end of the connecting rod 1 with the angle connection tool, pass the nose cap A through the connecting rod 1, connect the nose seat 7 with the nose joint 28, and then insert the other end of the connecting rod 1 through the straight bushing 32 and connect it with the disassembly ring 5, so that the disassembly ring 5 and the pulling gun 4 are respectively located on both sides of the base hole, and the disassembly ring 5 is stably and tightly attached to the surface of the base hole;

[0151] S2, start the pulling gun 4, push the straight bushing 32 out of the bottom hole through the disassembly ring 5, and complete the disassembly of the straight bushing 32;

[0152] It should be noted that the outer diameter of the disassembly ring 5 should be between the inner diameter and the outer diameter of the straight bushing 32, and after the pulling gun 4 is started, the control button 412 must not be released before the straight bushing 32 is pulled away from the base hole.

[0153] The above records the application of the angle connection tool in the small axial clearance base hole strengthening scenario, but the scope of use of the tool is not limited to this, and it can be applied to any application scenario that requires changing the transmission direction of the power source.

[0154] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A corner connection tool, comprising a tool body, characterized in that: The tool body includes a through rod connecting part, a pull gun connecting part and an L-shaped connecting part. The through rod connecting part and the pull gun connecting part are respectively fixedly connected to both ends of the L-shaped connecting part. The included angle α between the through rod connecting part and the pull gun connecting part is 90° to 120°. A through hole in the shape of an L is formed in the tool body and sequentially penetrates through the through rod connecting part, the pull gun connecting part and the L-shaped connecting part. A corner transmission component is arranged in the through hole; The corner transmission component includes a muzzle fixing sleeve, a gun core connecting rod, a pull rod, a chain and a through rod joint. The chain is located in the L-shaped connecting part. One end of the pull rod is rotatably connected to the chain and is located in the pull gun connecting part. The gun core connecting rod is fixedly connected to the other end of the pull rod. The through rod joint is rotatably connected to the chain and is located in the through rod connecting part. The muzzle fixing sleeve is rotatably connected to the pull gun connecting part; A rotating shaft is rotatably installed at the corner of the L-shaped connecting part, and a roller is sleeved on the rotating shaft.

2. The corner connection tool according to claim 1, wherein: External threads are provided on the gun core connecting rod, internal threads are provided on the muzzle fixing sleeve, and internal threads are provided on the through rod joint.

3. The corner connection tool according to claim 1, characterized in that: A connecting pipe is provided at the end of the pull gun connecting part. The gun core connecting rod is inserted through the connecting pipe. The muzzle fixing sleeve is sleeved on the connecting pipe. An annular groove is formed in the muzzle fixing sleeve. A sealing ring and a washer are embedded in the annular groove. An embedding groove is formed in the connecting pipe, and a retaining ring is embedded in the embedding groove.

4. The angled connecting tool according to claim 1, wherein: A limiting groove is formed in the pull gun connecting part, and a limiting block is sleeved on the gun core connecting rod. The limiting block is slidably embedded in the limiting groove.

5. The corner connection tool according to claim 1, characterized in that: A nose top joint sleeved on the through rod joint is provided at the port of the through rod connecting part.

6. A method for using a corner connection tool, characterized in that: Using the corner connection tool according to any one of claims 1-5 as the connection tool between the power source and the moving part, so as to install the strengthening part in the small axial clearance basic hole and strengthen the basic hole, including the following steps: S1. A basic hole is formed in the base material; S2. Connect the corner connection tool to the pull gun as the power source, connect the mandrel as the moving part to the corner connection tool, pass the nose top cap through the mandrel and connect it to the corner connection tool, insert the strengthening part into the basic hole or sleeve it on the mandrel, insert the mandrel into the basic hole, start the pull gun, pull the mandrel away from the basic hole, and extrude and strengthen the base material around the basic hole; S3. Finish reaming the inner hole of the strengthening part to the required inner diameter size to complete the strengthening.

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