Hole making method based on inner side feature position

Abstract

The invention discloses a hole making method based on an inner side feature position, belongs to the technical field of aircraft assembly and is applied to the field of aircraft assembly. According to the hole making method, the inner side features such as the position of a side line are recognized through automatic equipment, so that the outer side hole making position is obtained, hole making from the outer side is achieved, and the requirement for controlling the distance between holes and the inner side features is met. The implementation method comprises the following steps: arranging a signal transmitting device on the inner side of a part, receiving a signal by using equipment on the outer side of the part, and analyzing to obtain the position of a signal source; a plurality of signal sources can be arranged, and the plurality of signal sources together explain the feature shape and position of the inner side part. According to the invention, the hole is formed along with the offset of the edge of the internal part, and the hole edge distance meets the requirement; any position of the edge of the internal part of the product can be obtained, and the application range is wide; drilling and drilling preparation work for establishing a reference in a traditional drilling method are avoided, the reference position is determined by using a simple manual measurement method, and the working efficiency is improved; and the automation degree is high.

Description

Technical Field

[0001] The present invention belongs to the automated processing realization part in the field of aircraft assembly technology, and relates to a hole making method based on inner characteristic positions, which is a method for identifying inner characteristic positions by using automated equipment and a signal transmitting device on the inner side of a part. Background Art

[0002] The common method of automatic hole making in aircraft assembly is to make holes from the outside of the product to the inside. Before making holes in the product, the hole making equipment identifies the positions of several benchmarks, establishes the relationship between the product position and the equipment position, and then makes holes in the product. The benchmark can be a hole already made on the surface of the product, or it can be an installed fastener, etc. The benchmark is installed according to the theoretical position. The position tolerance of the internal components of some products is large, and the edge of the part deviates from the theoretical position by a large amount. Making holes through this benchmark will result in drilling to the edge of the part or the hole distance from the edge of the part not meeting the requirements. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a method for automatically correcting the position of fastener holes during automatic hole making in assembly. By placing a number of signal emitting devices on the edge of each part inside the product, the actual position of the signal emitting device on each edge is measured using numerical control equipment outside the product to obtain the actual position of the edge of the internal part. Each edge is a group, and a comparison and analysis between the actual position and the theoretical position is performed to obtain a deviation value. The deviation value is measured for each signal emitting device on each edge. The distance from the theoretical position of the hole making on this edge to the signal emitting device is then calculated geometrically to obtain the deviation value of each drilling position. The theoretical drilling position is corrected according to the deviation value, and drilling is performed to achieve a hole distance that meets the requirements of the edge position of the internal part.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A hole making method based on the inner characteristic position, the hole making method is implemented based on a signal transmitter 3, a numerical control device 4, and a signal receiving and analyzing device 5. A signal transmitter is fixed at the center of the signal transmitter 3, and the signal transmitter 3 is fixed to the edge of the internal part of the assembled product. The position of the signal transmitter 3 is determined by the following method: the fixed position is manually measured along the length direction of the part edge using a simple tool such as a tape measure, and no measurement is required perpendicular to the part edge direction. The signal transmitter 3 is attached to this edge, and the signal transmitter 3 is fixed using a simple method such as tape. The central signal transmitter of the signal transmitter 3 is perpendicular to the fixed surface of the product, and its contact surface with the product is a plane or a stepped structure. The contact surface has a certain size, such as 10 mm long and 10 mm wide, and the size must meet the requirement that the central signal transmitter of the signal transmitter 3 is perpendicular to the product surface. The signal emitted by the signal transmitter 3 can be a magnetic field signal, an electric field signal, an acoustic wave signal, etc. For each internal part edge of the assembled product, the number of signal transmitters 3 is n, which is specifically determined by the length of the internal part edge. Generally, one is arranged at a spacing of about 0.5m along the length direction of the part edge. For shorter edges, the number is not less than 2. The numerical control device 4 is a numerical control device, which includes a working head and various linear or rotating axes, and the position of the working head is controlled by a numerical control program. The signal receiving and analyzing device 5 is fixed on the working head of the numerical control device 4. The receiving component of the signal receiving and analyzing device 5 is controlled by the numerical control device 4 to be near the signal transmitting device, specifically, the receiving component is perpendicular to the outer surface of the product, 0-30mm away from the product surface, and the signal receiving and analyzing device is started. The signal receiving and analyzing device identifies the position of the transmitted signal, specifically, the position of the signal transmitter of the signal transmitting device 3 relative to the signal receiving component in the direction perpendicular to the signal receiving component. This position is represented by A. A is decomposed along the length direction of the internal part edge of the product and perpendicular to the length direction to obtain the vertical edge size V, which represents the offset distance of the actual position of this edge at the signal transmitting device relative to the theoretical position. This is the calculation of the position and size of a signal transmitter. The position and size of each signal transmitter are processed in this way. The offset size of the nth signal transmitter in the direction perpendicular to the edge of the internal part is recorded as Vn, and the distance between the nth point and the n+1 point is recorded as Bn. A hole H is drilled between the nth and n+1th signal transmitters. Signal transmitters n and n+1 can be obtained on both sides of H along the length direction of the part. The distance between H and points n and n+1 can be known through geometric calculation, Vn and Vn+1 can be known. Through geometric analysis and calculation, the distance V of the drilling point H in the direction perpendicular to the edge of the internal part can be obtained. H When the equipment automatically makes holes, the theoretical value T is offset by V in the direction perpendicular to the edge of the internal part. H Hole making. The hole making method comprises the following steps:

[0006] Step 1: Fix the product to the equipment processing position, manually fix the signal transmitter 3 to an edge of a part inside the product, and fix it.

[0007] Specifically, multiple signal transmitters 3 are set up, which are set up in the following way: along the length direction of the part edge, use a simple tool such as a tape measure to manually measure the fixed position, and no measurement is required in the direction perpendicular to the part edge. The signal transmitter 3 is attached to this edge and fixed by a simple method such as tape to keep its bottom surface in contact with the product surface. At this time, the signal transmitter at its center is perpendicular to the fixed surface of the product. The number of signal transmitters 3 arranged is n, which is specifically determined by the length of the internal part edge. Generally, one is arranged along the length direction of the part edge at a spacing of about 0.5m. For shorter sides, the number is not less than 2.

[0008] Step 2: Fix the signal receiving and analyzing device 5 on the working head of the numerical control device 4. The numerical control device 4 is located outside the product. The numerical control device 4 moves the signal receiving and analyzing device 5 on the working head to the outer surface of the product and near a signal transmitting device according to the pre-written numerical control program. Specifically, the receiving component is perpendicular to the outer surface of the product and 0-30mm away from the product surface.

[0009] Step 3: Continue to operate the numerical control device 4, start the signal receiving and analyzing device 5 to measure the position of the first signal transmitting device. The signal receiving and analyzing device identifies the position of the transmitted signal, specifically, the position of the signal transmitter of the signal transmitting device 3 relative to the signal receiving component in a direction perpendicular to the signal receiving component, and this position is represented by A1.

[0010] Step 4: Process the position data A1. Specifically, decompose A1 along the length direction of the edge of the internal part of the product and perpendicular to the length direction to obtain the vertical dimension V1 of the edge. V1 represents the offset distance of the actual position of the edge at this signal transmitter position relative to the theoretical position. Record the position and dimension V1 of the first signal transmitter.

[0011] Step 5: Continue to operate the numerical control device 4 to measure the position of the second signal transmitter. Specifically, move the signal receiving and analyzing device 5 on the working head to the vicinity of the outer surface of the product and a signal transmitter, specifically, the receiving component is perpendicular to the outer surface of the product and 0-30mm away from the product surface.

[0012] Step 6: Start the signal receiving and analyzing device 5 to measure the position of the second signal transmitting device. The signal receiving and analyzing device identifies the position of the transmitted signal, specifically the position of the signal transmitter of the signal transmitting device 3 relative to the signal receiving component in a direction perpendicular to the signal receiving component, and this position is represented by A2.

[0013] Step 7: Process the position data A2. Specifically, decompose A2 along the length direction of the edge of the internal part of the product and perpendicular to the length direction to obtain the vertical dimension V2 of the edge. V2 represents the offset distance of the actual position of the edge at this signal transmitter position relative to the theoretical position. Record the position and dimension V1 of the third signal transmitter.

[0014] Step 8: Measure the positions of other signal emitting devices on this edge and proceed according to steps 5, 6 and 7.

[0015] Step 9: Correct the drilling position and drill: For the nth signal transmitter position, the offset size in the direction perpendicular to the edge of the internal part is recorded as Vn, and the distance between the nth point and the n+1 point is recorded as Bn. Drill a hole H between the nth and n+1 signal transmitters. Signal transmitters n and n+1 can be obtained on both sides of H along the length direction of the part. The distance between H and points n and n+1 can be known through geometric calculation. Vn and Vn+1 can be known. Through geometric analysis and calculation, the distance V of the drilling point H in the direction perpendicular to the edge of the internal part can be obtained. H When the equipment automatically makes holes, the theoretical value T is offset by V in the direction perpendicular to the edge of the internal part. H Hole making.

[0016] The beneficial effects of the present invention are:

[0017] (1) The present invention realizes hole making following the edge offset of internal parts, ensuring that the hole margin meets the requirements.

[0018] (2) The present invention can achieve the position at any position of the edge of the internal parts of the product, and has a wide range of applications.

[0019] (3) The benchmark realization method of the present invention avoids the drilling and preparation work of drilling holes to establish benchmarks in the traditional method, and uses a simpler manual measurement method to determine the benchmark position, thereby improving work efficiency.

[0020] (4) The present invention is used in combination with numerical control equipment, and the automation level is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The working structure diagram of the fastener hole position automatic correction system is shown.

[0022] Figure 2 It means that the signal transmitting device is arranged on the edge of the internal parts of the product.

[0023] In the figure: 1 product represents the aircraft skin; 2 product represents the aircraft type long stringer; 3 signal transmitting device; 4 numerical control equipment; 5 signal receiving and analyzing device. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific embodiments.

[0025] Figure 1 The working structure diagram of the automatic correction system for the position of fastener holes is shown, in which 1 represents an aircraft product, which is a skin in this embodiment. 2 represents an aircraft product, which is an I-type long stringer in this embodiment. 3 represents a signal transmitting device, which is a small component in the shape of a rectangular parallelepiped with a length of 2 cm, a width of 1 cm, and a height of 1 cm. 4 represents a numerical control device, which is specifically a working head of a numerical control device in this embodiment. 5 represents a signal receiving and analyzing device, which is specifically a signal receiving and analyzing system in this embodiment. A method for making holes based on an inner characteristic position comprises the following steps:

[0026] The first step is to fix the C919 vertical tail skin product 1 to the equipment processing position, and its inner surface is an I-shaped long stringer.

[0027] Specifically, six signal transmitters 3 are arranged on each long stringer, and are arranged in the following manner: a tape measure is used to manually measure a fixed position along the length direction of the edge of the long stringer, and the signal transmitter 3 is attached to the edge and fixed with tape to keep its bottom surface in contact with the product surface.

[0028] Step 2: Fix the signal receiving and analyzing device 5 on the working head of the numerical control device 4. The numerical control device 4 is located outside the product. The numerical control device 4 moves the signal receiving and analyzing device 5 on the working head to the outer surface of the product and near the first signal transmitting device according to the pre-written numerical control program. Specifically, the receiving component is perpendicular to the outer surface of the product and 0 mm away from the product surface.

[0029] Step 3: Continue to operate the numerical control device 4, start the signal receiving and analyzing device 5 to measure the position of the first signal transmitting device. The signal receiving and analyzing device identifies the position of the transmitted signal, specifically, the position of the signal transmitter of the signal transmitting device 3 relative to the signal receiving component in a direction perpendicular to the signal receiving component, and this position is represented by A1.

[0030] Step 4: Process the position data A1. Specifically, decompose A1 along the length direction of the edge of the internal part of the product and perpendicular to the length direction to obtain the vertical dimension V1 of the edge. V1 represents the offset distance of the actual position of the edge at this signal transmitter position relative to the theoretical position. Record the position and dimension V1 of the first signal transmitter.

[0031] Step 5: Continue to operate the numerical control device 4 to measure the position of the second signal transmitter. Specifically, the signal receiving and analyzing device 5 on the working head is moved to the vicinity of the outer surface of the product and the first signal transmitter, specifically, the receiving component is perpendicular to the outer surface of the product and 0 away from the product surface.

[0032] Step 6: Start the signal receiving and analyzing device 5 to measure the position of the second signal transmitting device. The signal receiving and analyzing device identifies the position of the transmitted signal, specifically the position of the signal transmitter of the signal transmitting device 3 relative to the signal receiving component in a direction perpendicular to the signal receiving component, and this position is represented by A2.

[0033] Step 7: Process the position data A2. Specifically, decompose A2 along the length direction of the edge of the internal part of the product and perpendicular to the length direction to obtain the vertical dimension V2 of the edge. V2 represents the offset distance of the actual position of the edge at this signal transmitter position relative to the theoretical position. Record the position and dimension V1 of the third signal transmitter.

[0034] Step 8: Measure the positions of other signal transmitting devices on this long beam and proceed according to steps 5, 6 and 7.

[0035] Step 9: Correct the drilling position and drill: For the nth signal transmitter position, the offset size in the direction perpendicular to the edge of the internal part is recorded as Vn, and the distance between the nth point and the n+1 point is recorded as Bn. Drill a hole H between the nth and n+1 signal transmitters. Signal transmitters n and n+1 can be obtained on both sides of H along the length direction of the part. The distance between H and points n and n+1 can be known through geometric calculation. Vn and Vn+1 can be known. Through geometric analysis and calculation, the distance V of the drilling point H in the direction perpendicular to the edge of the internal part can be obtained. H When the equipment automatically makes holes, the theoretical value T is offset by V in the direction perpendicular to the edge of the internal part. H Hole making.

[0036] Step 10: Drill holes on the stringer. Repeat steps 2 to 9 to continue drilling holes on other stringers.

[0037] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A hole making method based on inner characteristic position, characterized in that: The hole making method is implemented based on a signal transmitting device (3), a numerical control device (4), and a signal receiving and analyzing device (5); a signal transmitter is fixed at the center of the signal transmitting device (3), and the signal transmitting device (3) is fixed to the edge of the internal part of the assembled product; the signal transmitter at the center of the signal transmitting device (3) is perpendicular to the fixed surface of the product; for each edge of the internal part of the assembled product, the number of signal transmitting devices (3) is n; the numerical control device (4) controls the position of its working head through a numerical control program; the signal receiving and analyzing device (5) is fixed on the working head of the numerical control device (4), and the receiving component of the signal receiving and analyzing device (5) is controlled by the numerical control device (4) to be near the signal transmitting device (3), and the signal receiving and analyzing device is started, and the signal receiving and analyzing device (5) identifies the position of the transmitted signal; the hole making method comprises the following steps: Step 1: Fix the product to the processing position of the equipment and fix n signal transmitting devices (3) to the edges of the internal parts of the product; Step 2: fix the signal receiving and analyzing device (5) on the working head of the numerical control device (4); the numerical control device (4) is located outside the product, and the receiving component of the signal receiving and analyzing device (5) is moved to the outer surface of the product, near a signal transmitting device (3); Step 3: Continue to operate the numerical control device (4), start the signal receiving and analyzing device (5) to measure the position of the first signal transmitting device (3); the signal receiving and analyzing device (5) identifies the position of the transmitted signal, which refers to: the position of the signal transmitter of the signal transmitting device (3) relative to the signal receiving component in a direction perpendicular to the signal receiving component, and this position is represented by A1; Step 4: Processing the position data A1; Step 5: Continue to operate the numerical control device (4) to measure the position of the second signal transmitting device; move the receiving component of the signal receiving and analyzing device (5) to the outer surface of the product and near one signal transmitting device; Step 6: Start the signal receiving and analyzing device (5) to measure the position of the second signal transmitting device; the signal receiving and analyzing device (5) identifies the position of the transmitted signal, which refers to: the position of the signal transmitter of the signal transmitting device (3) relative to the signal receiving component in a direction perpendicular to the signal receiving component, and this position is represented by A2; Step 7: Processing the position data A2; Step 8: Measure the positions of other signal emitting devices on this edge and process according to steps 5, 6 and 7; Step 9: Correct the drilling position and drill: The offset size of the nth signal transmitter position in the direction perpendicular to the edge of the internal part is recorded as Vn, and the distance between the nth point and the n+1th point is recorded as Bn. A hole H is drilled between the nth and n+1th signal transmitters. Signal transmitters n and n+1 can be obtained on both sides of H along the length direction of the part. The distance between H and points n and n+1 can be known through geometric calculation. Vn and Vn+1 can be known. The distance V between the drilling point H in the direction perpendicular to the edge of the internal part can be obtained through geometric analysis and calculation. H ; When the equipment automatically makes holes, the theoretical value T is offset by V in the direction perpendicular to the edge of the internal part H Hole making.

2. A hole making method based on inner characteristic position according to claim 1, characterized in that: The signal emitting device (3) is arranged in the following manner: a fixed position is measured along the length direction of the edge of the part, and no measurement is required in the direction perpendicular to the edge of the part. The signal emitting device (3) is fixed to the edge, and its bottom surface is kept in contact with the surface of the product. At this time, the signal emitter at the center of the signal emitting device (3) is perpendicular to the fixed surface of the product; the number of signal emitting devices (3) arranged is n, which is specifically determined by the edge length of the internal part, and one is arranged at a spacing of 0.5m along the length direction of the edge of the part. For shorter sides, the number is not less than 2.

3. A hole making method based on inner characteristic position according to claim 1, characterized in that: In the second step, the receiving component of the signal receiving and analyzing device (5) is perpendicular to the outer surface of the product and is 0-30 mm away from the product surface.

4. A hole making method based on inner characteristic position according to claim 1, characterized in that: In the fifth step, the receiving component of the signal receiving and analyzing device (5) is perpendicular to the outer surface of the product and is 0-30 mm away from the product surface.

5. The hole making method based on the inner characteristic position according to claim 1, characterized in that: The fourth step of processing A1 is specifically as follows: decomposing A1 along the length direction of the edge of the internal part of the product and perpendicular to the length direction to obtain the dimension V1 perpendicular to the edge, where V1 represents the offset distance of the actual position of this edge at this signal transmitting device position relative to the theoretical position; recording the first signal transmitting device position and dimension V1.

6. A hole making method based on inner characteristic position according to claim 1, characterized in that: The seventh step of processing A2 is: decomposing A2 along the length direction of the edge of the internal part of the product and perpendicular to the length direction to obtain the dimension V2 perpendicular to the edge, V2 represents the offset distance of the actual position of this edge at this signal transmitting device position relative to the theoretical position; recording the position and dimension V1 of the third signal transmitting device.

7. A hole making method based on inner characteristic position according to claim 1, characterized in that: The signal transmitting device (3) transmits a magnetic field signal, an electric field signal, or a sound wave signal.

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