Special-shaped sleeve part sleeve wall hole forming positioning device and hole forming method

Abstract

The invention discloses a special-shaped sleeve part cylinder wall hole forming positioning device and a hole forming method. The special-shaped sleeve part cylinder wall hole forming positioning device is provided with a positioning shaft, a cushion block, a locking nut, a positioning pin sleeve, a locking pin and a positioning supporting seat. The positioning shaft is a stepped shaft, one end of the positioning shaft is installed on a chuck of numerical control machining equipment, a positioning hole matched with a to-be-formed hole in a workpiece in size and position is formed in the middle of the positioning shaft, and external threads are arranged at the other end of the positioning shaft. The cushion block is arranged at the end, provided with the external threads, of the positioning shaft in a sleeving mode and matched with the external threads on the positioning shaft through the locking nut, and the step face of the cushion block and the step face of the positioning shaft are attached and pressed tightly. The positioning supporting seat is mounted on the horizontal working platform, and a positioning pin hole is formed in the upper end of the positioning supporting seat; the positioning pin sleeve penetrates through a hinge hole in the workpiece and a positioning pin hole in the positioning supporting seat, and a locking pin is assembled at the tail end of the positioning pin sleeve. According to the method, the problem that holes are formed in the cylinder wall of the special-shaped sleeve part is solved, and the purpose of guaranteeing the maintenance quality and flight safety of an airplane is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft maintenance, and in particular to a workpiece positioning device and a hole making method for a canard rocker arm hole making operation during aircraft maintenance. Background Art

[0002] As attached Figures 1 to 3 As shown, the canard 1 of a certain type of aircraft needs to be connected to the actuator through the canard rocker 3 set on the canard shaft beam 2. The canard rocker 3 is a special-shaped sleeve-like part. A hinge seat 3-3 connected to the actuator is provided on the outer wall of the sleeve. A hinge hole 3-2 is provided on the hinge seat 3-3. The sleeve of the canard rocker 3 is sleeved on the canard shaft beam 2 and fixed to the canard shaft beam 2 by bolts. During the maintenance of this type of aircraft, due to the deformation of the old canard rocker 3, the bolts cannot pass through the assembly hole 3-1 on the canard rocker 3 and the assembly hole on the canard shaft beam 2 at the same time, so a new canard rocker 3 needs to be replaced. Before replacing the new canard rocker arm 3, a new hole needs to be prepared on the wall of the canard rocker arm tube in conjunction with the assembly hole on the canard shaft beam 2, which brings about the problem of positioning the new canard rocker arm workpiece. In addition, according to the traditional hole making method, the tool needs to be placed inside the canard shaft beam 2. Due to the small working space, it is not only difficult for the operator's arm to enter, the operation is difficult, and it is easy to cause aperture deviation, but also special tools and reamer positioning tools are required. Therefore, it is very necessary to innovatively design a hole making and positioning device for the tube wall of a special-shaped sleeve part and a hole making method. Summary of the invention

[0003] The present invention provides a hole making and positioning device for a cylinder wall of a special-shaped sleeve part and a hole making method, aiming to realize reliable positioning of special-shaped sleeve parts through a workpiece positioning device, and to make holes on a new canard rocker arm through an in-situ hole-guiding method to ensure that bolts can simultaneously pass through assembly holes on the canard rocker arm and the canard shaft beam, thereby achieving the purpose of improving the quality of aircraft maintenance work and flight safety.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme: A device for positioning holes in the wall of a special-shaped sleeve part, comprising a positioning shaft, a cushion block, a locking nut, a positioning pin sleeve, a locking pin and a positioning support seat; the positioning shaft is a stepped shaft with thin ends and a thick middle, one end of which is mounted on the chuck of a CNC machining device, a positioning hole matching the size and position of the hole to be made on the workpiece is provided in the middle of the positioning shaft, and an external thread is provided at the other end of the positioning shaft; the cushion block is sleeved on the end of the positioning shaft with an external thread, and the cushion block is fitted and pressed against the stepped surface of the positioning shaft through the locking nut cooperating with the external thread on the positioning shaft; the positioning support seat is installed on a horizontal working platform, and a positioning pin hole is provided on the upper end of the positioning support seat; the positioning pin sleeve passes through the hinge hole on the workpiece and the positioning pin hole on the positioning support seat, and a locking pin is fitted at the end of the positioning pin sleeve.

[0005] The above-mentioned device for positioning the hole in the wall of the special-shaped sleeve part is also provided with a correction rod, which is a stepped cylindrical structure, and its small diameter end matches the size of the positioning hole on the positioning shaft. The axial dimension of the small diameter end of the correction rod is larger than the sum of the positioning shaft diameter and twice the wall thickness of the workpiece sleeve.

[0006] The above-mentioned device for making holes and positioning the wall of a special-shaped sleeve part, the positioning pin sleeve is composed of a working part, a clamping part and a pin sleeve handle; the working part is a cylindrical structure, and a threaded hole is provided at the outer end of the working part; the clamping part is arranged between the working part and the pin sleeve handle, and the clamping part is a frustum structure.

[0007] In the above-mentioned special-shaped sleeve part wall hole making and positioning device, the locking pin is composed of a screw rod, a locking part and an operating part; the screw rod matches the threaded hole of the positioning pin sleeve; the locking part is arranged between the screw rod and the operating part, and the locking part is a truncated cone structure.

[0008] A method for making holes in the wall of a special-shaped sleeve part is used for preparing mounting holes on the wall of a new aircraft canard rocker arm sleeve during aircraft maintenance. The special-shaped sleeve part wall hole making and positioning device is used to complete the hole making operation through an in-situ hole-guiding process. The specific operation steps are as follows: a. Select a sample, a canard rocker arm sample that can be assembled with the canard shaft beam on the aircraft by bolts, and use the two sets of assembly holes on the canard rocker arm sample as a reference to machine two sets of positioning holes on the positioning shaft of the special-shaped sleeve part cylinder wall hole making and positioning device; b. Sample installation: Clamp the positioning shaft of the hole-making positioning device of the special-shaped sleeve part on the chuck of the CNC machining equipment, and assemble the sample and the positioning shaft; c. Fix the sample. Pass the small diameter ends of two calibration rods with exactly the same size through the assembly hole of the sample and the positioning hole on the positioning shaft, and then press and fix the sample with the pad and locking nut; d. Use the micrometer installed on the spindle tool holder of the CNC machining equipment to align the two correction rods, and use the CNC machining equipment to record the coordinate values ​​of the assembly holes on the sample; e. Install the positioning support seat, fix the sample and the positioning support seat with the positioning pin sleeve and locking pin, and position the horizontal angle of the positioning pin hole on the positioning support seat; f. Replace the workpiece to be processed, remove the sample, and assemble the workpiece to be processed with the hole-making and positioning device of the special-shaped sleeve part; g. Perform hole making operation on the workpiece according to the coordinate values ​​of the assembly holes on the sample recorded by the CNC machining equipment.

[0009] In the above-mentioned method for making holes in the wall of a special-shaped sleeve part, in the step d, the angle of the spindle tool holder of the processing equipment is adjusted so that the upper end face runout of the correction rod inserted into the two assembly holes of the sample is less than 0.01 mm.

[0010] In the above-mentioned method for making holes in the wall of a special-shaped sleeve part, in step e, after one end of the locating pin sleeve with a threaded hole passes through the hinge hole on the sample and the locating pin hole on the locating support seat, the threaded hole is assembled with the screw of the locking pin to achieve the horizontal angle positioning of the locating pin hole on the locating support seat.

[0011] In the above-mentioned method for making holes in the wall of a special-shaped sleeve part, in the step e, after the sample and the positioning support seat are fixedly assembled, the positioning support seat is fixed on a horizontal workbench.

[0012] The present invention provides a hole making and positioning device for a cylinder wall of a special-shaped sleeve part and a hole making method. The hole making and positioning device for a cylinder wall of a special-shaped sleeve part can realize reliable positioning of special-shaped sleeve parts, and is particularly suitable for the replacement of canard rocker arm parts during aircraft maintenance. Before the replacement of the canard rocker arm parts, a hole is made on the new canard rocker arm by cooperating with a numerical control processing device by an in-situ hole-guiding method, thereby solving the problem of the traditional hole making method being difficult to operate and prone to causing a hole diameter deviation, ensuring that the bolt can simultaneously pass through the assembly holes on the canard rocker arm and the canard shaft beam, thereby achieving the purpose of improving the quality of aircraft maintenance work and flight safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the assembly structure of the canard, canard shaft beam and canard rocker arm of a certain type of aircraft; Figure 2 It is a schematic diagram of the canard rocker arm structure; Figure 3 yes Figure 2 Schematic diagram of the middle canard rocker arm after spatial rotation; Figure 4 It is a schematic diagram of the hole-making and positioning device for the wall of a special-shaped sleeve part and the workpiece assembly structure; Figure 5 yes Figure 4 Schematic diagram of the explosion structure; Figure 6 It is a schematic diagram of the structure of the positioning pin sleeve in the hole-making positioning device of the special-shaped sleeve part; Figure 7 The invention is a schematic diagram of the locking pin structure in a hole-making and positioning device for a special-shaped sleeve part.

[0014] Explanation of the symbols in the figure: 1 is a canard; 2 is a canard shaft beam; 3 is a canard rocker arm (i.e., a workpiece), 3-1 is an assembly hole, 3-2 is an articulated seat, and 3-3 is an articulated hole; 4 is a locating shaft, 4-1 is a locating hole, and 4-2 is an external thread; 5 is a correction rod, and 5-1 is a small diameter end; 6 is a spacer; 7 is a locking nut; 8 is a locating pin sleeve, 8-1 is a working part, 8-2 is a clamping part, 8-3 is a pin sleeve handle, and 8-4 is a threaded hole; 9 is a locking pin, 9-1 is a screw, 9-2 is a locking part, and 9-3 is an operating part; 10 is a locating support seat, and 10-1 is a locating pin hole. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] See Figure 1. Figure 2 , Figure 3 The canard 1 of a certain type of aircraft needs to be connected to the actuator through the canard rocker arm 3 provided on the canard shaft beam 2. The canard rocker arm 3 is a special-shaped sleeve-like part. A hinge seat 3-3 connected to the actuator is provided on the outer wall of the sleeve. A hinge hole 3-2 is provided on the hinge seat 3-3. The sleeve of the canard rocker arm 3 is sleeved on the canard shaft beam 2 and fixed to the canard shaft beam 2 by bolts. During the maintenance of this type of aircraft, the old canard rocker arm 3 is deformed, resulting in the inability of the bolts to pass through the assembly hole 3-1 on the canard rocker arm 3 and the assembly hole on the canard shaft beam 2 at the same time. Therefore, a new canard rocker arm 3 needs to be installed. Before replacing the new canard rocker arm 3, a new hole needs to be prepared on the canard rocker arm cylinder wall to match the assembly hole on the canard shaft beam 2.

[0017] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5In order to solve the problem that the traditional method of making holes on the wall of the sleeve of the canard rocker arm 3 is difficult to operate and easy to cause aperture deviation, the present invention provides a hole-making and positioning device for the wall of a special-shaped sleeve part, which is provided with a positioning shaft 4, a correction rod 5, a cushion block 6, a locking nut 7, a positioning pin sleeve 8, a locking pin 9 and a positioning support seat 10; the positioning shaft 4 is a stepped shaft with thin ends and thick middle, one end of which is installed on the chuck of a CNC machining equipment, a positioning hole 4-1 matching the size and position of the hole to be made on the workpiece is provided in the middle of the positioning shaft 4, and an external thread 4-2 is provided at the other end of the positioning shaft 4; the cushion block 6 is sleeved on the end of the positioning shaft 4 with the external thread, and is passed through The locking nut 7 cooperates with the external thread 4-2 on the positioning shaft 4 to fit the cushion block 6 and the stepped surface of the positioning shaft 4 tightly; the positioning support seat 10 is installed on a horizontal working platform, and a positioning pin hole 10-1 is provided at the upper end of the positioning support seat 10; the positioning pin sleeve 8 passes through the hinge hole 3-3 on the workpiece and the positioning pin hole 10-1 on the positioning support seat 10, and a locking pin 9 is installed at the end of the positioning pin sleeve 8; the correction rod 5 is a stepped cylindrical structure, and its small diameter end 5-1 matches the size of the positioning hole 4-1 on the positioning shaft 4, and the axial dimension of the small diameter end 5-1 of the correction rod 5 is larger than the sum of the positioning shaft diameter and twice the wall thickness of the workpiece sleeve.

[0018] See also Figure 4 , Figure 5 , Figure 6 The positioning device for making holes in the wall of a special-shaped sleeve part described in the present invention, its positioning pin sleeve 8 is composed of a working part 8-1, a clamping part 8-2 and a pin sleeve handle 8-3; the working part 8-1 is a cylindrical structure, and a threaded hole 8-4 is provided at the outer end of the working part 8-1; the clamping part 8-2 is arranged between the working part 8-1 and the pin sleeve handle 8-3, and the clamping part 8-2 is a frustum of a cone structure, which can achieve center positioning through the tapered surface cooperating with the hinge hole 3-1 on the workpiece.

[0019] See also Figure 4 , Figure 5 , Figure 7 The device for making holes and positioning the wall of a special-shaped sleeve part described in the present invention has a locking pin 9 composed of a screw rod 9-1, a locking portion 9-2 and an operating portion 9-3; the screw rod 9-1 matches the threaded hole 8-4 of the positioning pin sleeve 8; the locking portion 9-2 is arranged between the screw rod 9-1 and the operating portion 9-3, and the locking portion 9-2 is a frustum of a cone structure, which can achieve center positioning through the cooperation of the conical surface with the hinge hole 3-1 on the workpiece.

[0020] See also Figures 1 to 7 The present invention also provides a method for making holes in the wall of a special-shaped sleeve part, which is used in the aircraft maintenance process to prepare installation holes on the wall of a new aircraft canard rocker arm sleeve. The method adopts the above-mentioned special-shaped sleeve part wall hole making and positioning device, and completes the hole making operation through an in-situ hole-guiding process. The specific operation steps are as follows: a. Select a sample, select a canard rocker arm 3 sample that can be assembled with the canard shaft beam 2 on the aircraft by bolts, and use the two groups of assembly holes 3-1 on the canard rocker arm 3 sample as a reference to machine two groups of positioning holes 4-1 on the positioning shaft 4 of the special-shaped sleeve part cylinder wall hole making and positioning device; b. Sample installation: Clamp the positioning shaft 4-1 of the hole-making positioning device for the special-shaped sleeve part on the chuck of the CNC machining equipment, and assemble the sample with the positioning shaft 4-1; c. Fix the sample. Pass the small diameter ends 5-1 of two calibration rods 5 with exactly the same size through the assembly hole 3-1 of the sample and the positioning hole 4-1 on the positioning shaft 4, and then press and fix the sample with the pad 6 and the locking nut 7; d. Alignment by dialing. By adjusting the angle of the spindle tool holder of the CNC machining equipment, use the micrometer installed on the spindle tool holder of the CNC machining equipment to measure, so that the upper end face runout of the correction rod 5 inserted into the two assembly holes of the sample is less than 0.01mm, and record the coordinate value of the assembly hole 3-1 on the sample through the CNC machining equipment; e. Install the positioning support seat, pass one end of the positioning pin sleeve 8 with the threaded hole 8-4 through the hinge hole 3-3 on the sample and the positioning pin hole 10-1 on the positioning support seat 10, and assemble it with the screw 9-1 of the locking pin 9 through the threaded hole 8-4 to achieve the horizontal angle positioning of the positioning pin hole 10-1 on the positioning support seat 10, and then fix the positioning support seat 10 on the horizontal workbench; f. Replace the workpiece to be processed, remove the sample, and assemble the workpiece to be processed with the hole-making and positioning device of the special-shaped sleeve part; g. Perform hole making operation on the workpiece according to the coordinate values ​​of the assembly holes on the sample recorded by the CNC machining equipment.

Claims

1. A hole-making and positioning device for a special-shaped sleeve part, characterized in that: A positioning shaft (4), a cushion block (6), a locking nut (7), a positioning pin sleeve (8), a locking pin (9) and a positioning support seat (10) are provided; the positioning shaft (4) is a stepped shaft with thin ends and thick middle, one end of which is mounted on a chuck of a CNC machining device, a positioning hole (4-1) matching the size and position of a hole to be made on a workpiece is provided in the middle of the positioning shaft (4), and an external thread (4-2) is provided at the other end of the positioning shaft (4); the cushion block (6) is sleeved on the positioning shaft (4) and has an external thread One end of the positioning shaft (4) is engaged with the external thread (4-2) on the positioning shaft (4) through a locking nut (7), so that the cushion block (6) and the stepped surface of the positioning shaft (4) are fitted and pressed; the positioning support seat (10) is installed on a horizontal working platform, and a positioning pin hole (10-1) is provided on the upper end of the positioning support seat (10); the positioning pin sleeve (8) passes through the hinge hole (3-3) on the workpiece and the positioning pin hole (10-1) on the positioning support seat (10), and a locking pin (9) is installed at the end of the positioning pin sleeve (8).

2. The hole-making and positioning device for the wall of a special-shaped sleeve part according to claim 1 is characterized in that: A correction rod (5) is also provided. The correction rod (5) is a stepped cylindrical structure. The small diameter end (5-1) of the correction rod (5) matches the size of the positioning hole (4-1) on the positioning shaft (4). The axial dimension of the small diameter end (5-1) of the correction rod (5) is greater than the sum of the diameter of the positioning shaft and twice the wall thickness of the workpiece sleeve.

3. The hole-making and positioning device for the wall of a special-shaped sleeve part according to claim 2 is characterized in that: The positioning pin sleeve (8) is composed of a working part (8-1), a clamping part (8-2) and a pin sleeve handle (8-3); the working part (8-1) is a cylindrical structure, and a threaded hole (8-4) is provided at the outer end of the working part (8-1); the clamping part (8-2) is arranged between the working part (8-1) and the pin sleeve handle (8-3), and the clamping part (8-2) is a truncated cone structure.

4. The hole making and positioning device for the wall of a special-shaped sleeve part according to claim 2 or 3, characterized in that: The locking pin (9) is composed of a screw rod (9-1), a locking portion (9-2) and an operating portion (9-3); the screw rod (9-1) matches the threaded hole (8-4) of the positioning pin sleeve (8); the locking portion (9-2) is arranged between the screw rod (9-1) and the operating portion (9-3), and the locking portion (9-2) is a truncated cone structure.

5. A method for making holes in the wall of a special-shaped sleeve part, which is used in the process of aircraft maintenance to prepare mounting holes on the sleeve wall of a new aircraft canard rocker arm, and is characterized by: The hole making and positioning device for the cylinder wall of a special-shaped sleeve part according to any one of claims 1 to 4 is used to complete the hole making operation through an in-situ hole-making process, and the specific operation steps are as follows: a. Select a sample, a canard rocker arm (3) sample that can be assembled with a canard shaft beam (2) on an aircraft by bolts, and use the two groups of assembly holes (3-1) on the canard rocker arm (3) sample as a reference to machine two groups of positioning holes (4-1) on a positioning shaft (4) of a special-shaped sleeve part cylinder wall hole making and positioning device; b. Installing the sample: clamping the positioning shaft (4-1) of the special-shaped sleeve part wall hole positioning device on the chuck of the CNC processing equipment, and assembling the sample and the positioning shaft (4-1); c. Fix the sample by inserting the small diameter ends (5-1) of two calibration rods (5) of exactly the same size through the assembly hole (3-1) of the sample and the positioning hole (4-1) on the positioning shaft (4), and then pressing and fixing the sample with the spacer (6) and the locking nut (7); d. Use a micrometer installed on the spindle tool holder of the CNC machining equipment to align the two calibration rods (5) and record the coordinate values ​​of the assembly holes (3-1) on the sample through the CNC machining equipment; e. Install the positioning support seat, fix the sample and the positioning support seat (10) with the positioning pin sleeve (8) and the locking pin (9), and position the horizontal angle of the positioning pin hole (10-1) on the positioning support seat (10); f. Replace the workpiece to be processed, remove the sample, and assemble the workpiece to be processed with the hole-making and positioning device of the special-shaped sleeve part; g. Perform hole making operation on the workpiece according to the coordinate values ​​of the assembly holes on the sample recorded by the CNC machining equipment.

6. The method for making holes in the wall of a special-shaped sleeve part according to claim 5, characterized in that: In the step d, the spindle tool holder angle of the processing equipment is adjusted so that the upper end surface runout of the correction rod (5) inserted into the two assembly holes of the sample is less than 0.01 mm.

7. The method for making holes in the wall of a special-shaped sleeve part according to claim 5 or 6, characterized in that: In the step e, after one end of the positioning pin sleeve (8) with the threaded hole (8-4) passes through the hinge hole (3-3) on the sample and the positioning pin hole (10-1) on the positioning support seat (10), the threaded hole (8-4) is assembled with the screw rod (9-1) of the locking pin (9) to achieve the horizontal angle positioning of the positioning pin hole (10-1) on the positioning support seat (10).

8. The method for making holes in the wall of a special-shaped sleeve part according to claim 7, characterized in that: In the step e, after the sample and the positioning support seat (10) are fixedly assembled, the positioning support seat (10) is fixed on a horizontal workbench.

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