A method for engraving lines on an aircraft assembly tooling clamping plate

Abstract

The present invention belongs to the technical field of aircraft process equipment, and discloses a method for engraving lines on an aircraft assembly tooling template. First, prepare a platform and establish a three-dimensional digital model of the platform; then, set laser detection holes on the upper surface of the platform entity for placing laser targets, mark the positions of the laser targets on the three-dimensional digital model of the platform, and then install the platform digital model on the tooling digital model. Measure the coordinate values of the laser targets in the design coordinate system of the tooling, use a laser device to establish a coordinate system with a marked point on the tooling entity as the reference, place the laser target in the laser detection hole of the platform, adjust the position of the laser target according to the coordinate values obtained in step three, and then fix the platform. Use the intersection line between the upper surface of the platform and the template as the standard for engraving lines. Using the method of the present invention, it is no longer necessary to send it back to the jig manufacturing unit for processing with a CNC milling machine, which greatly improves work efficiency and solves the problem that the cycle for supplementing engraving lines is long due to the need to disassemble, install, and transport the template back and forth during the process of supplementing the engraving lines of the template in the past.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft processing equipment, and relates to a method for scribing a template, specifically to a method for scribing lines on an aircraft assembly tooling template. Background Art

[0002] The scribed lines such as the stringer axes, beam axes, centering lines, and skin cutting lines on the aircraft assembly tooling template often play an auxiliary positioning role. During the aircraft assembly process, as the aircraft assembly requirements change, it is often necessary to supplement the scribed lines on the template of the assembly tooling.

[0003] Currently, when it is necessary to supplement the scribed lines on the aircraft assembly tooling template, the template needs to be disassembled and pulled back to the jig manufacturing unit to complete the scribing using a CNC milling machine, and then the template is pulled back to the aircraft assembly site and installed back on the assembly tooling. There are many positioning parts on the template, and the positioning parts are often lost during the disassembly and transportation process. Moreover, the disassembly and assembly of the template and the round-trip transportation have a long cycle, resulting in high scribing costs and low efficiency. Summary of the Invention

[0004] To solve the above problems, the present invention provides a method for scribing lines on an aircraft assembly tooling template, which no longer requires disassembly, assembly, and round-trip transportation during the supplement of the scribed lines on the template.

[0005] The technical solution of the present invention is as follows:

[0006] A method for scribing lines on an aircraft assembly tooling template, comprising the following steps:

[0007] Step 1, prepare a reference platform for scribing and establish a 3D digital model of the platform;

[0008] Step 2, set at least three laser detection holes on the solid upper surface of the platform for placing laser targets, mark the positions of the laser targets on the 3D digital model of the platform, and then install the digital model of the platform on the digital model of the tooling;

[0009] Step 3, measure the coordinate values of the laser targets in the design coordinate system of the tooling;

[0010] Step 4, use a laser device to establish a coordinate system with a marked point on the solid of the tooling as a reference, place the laser target in the laser detection hole of the platform, adjust the position of the laser target according to the coordinate values obtained in Step 3, and then fix the platform;

[0011] Step 5, use the intersection line of the upper surface of the platform and the template as the standard scribed line.

[0012] Further, in Step 2, when the digital model of the platform is installed on the digital model of the tooling, the side surface of the platform fits with the surface of the template where the scribed lines need to be supplemented, and the upper surface of the platform coincides with the scribed lines to be supplemented on the template.

[0013] Furthermore, the laser target is specifically a laser target ball, and the laser device used in Step 4 is a laser tracker.

[0014] Furthermore, in Step 4, the selected fiducial point is a tooling TB seat that can be scanned and recognized by the same laser device as all laser target points.

[0015] Furthermore, in Step 4, the selected fiducial point is a card board OTP point that can be scanned and recognized by the same laser device as all laser target points.

[0016] Furthermore, the reference platform for scribing is specifically an angle seat. The angle seat has an L-shaped cross-section. Its upper surface is a precision-machined plane, and the side surface is the surface that fits against the card board. The machining precision of the side surface is not lower than that of the card board; a fixing structure for connecting with the card board is provided on the side surface of the angle seat.

[0017] Furthermore, the connecting and fixing structure specifically includes: a kidney-shaped hole is provided on the side surface of the angle seat, and a hook-shaped bolt passes through the kidney-shaped hole and is threadedly connected with a handle nut; when the side surface of the angle seat fits against the card board, the hook of the hook-shaped bolt is stuck at the edge of the card board, and the angle seat and the card board are relatively fixed by tightening the handle nut.

[0018] Furthermore, the kidney-shaped holes on the side surface of the angle seat are at least two kidney-shaped holes arranged at equal intervals, and the long hole direction of the kidney-shaped hole is perpendicular to the scribing edge of the upper surface of the angle seat.

[0019] Furthermore, there are four laser detection holes, and the four laser detection holes are respectively arranged at the four corners of the upper surface of the angle seat.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. Using the method of the present invention, only one laser device needs to be set up on site to complete the supplementary manufacturing of the card board scribing, and it is no longer necessary to send it back to the jig manufacturing unit for machining with a CNC milling machine, which greatly improves the work efficiency and solves the problem of long cycle for supplementary scribing due to disassembly, installation and round-trip transportation of the card board in the past during the supplementary manufacturing of the card board scribing.

[0022] 2. The method of the present invention also effectively avoids the problem of loss of parts attached to the card board that may occur during the transportation and processing of the card board, avoids the production schedule delay caused by the above problems, and improves the efficiency of supplementary scribing of the assembly jig card board. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of an angle seat according to an embodiment of the present invention;

[0024] Figure 2 It is a schematic installation diagram of an angle seat according to an embodiment of the present invention;

[0025] Figure 3Schematic diagram of a scribing method according to an embodiment of the present invention;

[0026] Wherein: 1 - angle seat, 2 - hook-shaped bolt, 3 - handle nut, 4 - clamping plate, 5 - laser target ball, 6 - TB seat, 7 - assembly tooling. Detailed implementation manners

[0027] This part is an embodiment of the present invention, used to explain and illustrate the technical solution of the present invention. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicating directions or position relationships are the azimuth or position relationships given in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or case must have a specific azimuth, be constructed and operated in a specific azimuth, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include more than one of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be interpreted in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0030] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0031] A method for scribing lines on a clamping plate of an aircraft assembly tooling includes the following steps:

[0032] Step 1, prepare a reference platform for scribing and establish a three-dimensional digital model of the platform;

[0033] Step 2, set at least three laser detection holes on the solid upper surface of the platform for placing laser targets, mark the positions of the laser targets on the three-dimensional digital model of the platform, and then install the digital model of the platform on the digital model of the tooling;

[0034] Step 3: Measure the coordinate values of the laser target in the design coordinate system of the tooling.

[0035] Step 4: Use the laser equipment to select a fiducial point on the entity of the tooling to establish a coordinate system. Place the laser target in the laser detection hole of the platform, adjust the position of the laser target according to the coordinate values obtained in Step 3, and then fix the platform.

[0036] Step 5: Use the intersection line of the upper surface of the platform and the clamping plate as the reference line.

[0037] In Step 2, when the digital model of the platform is installed on the digital model of the tooling, the side surface of the platform is fitted to the surface of the clamping plate where the line needs to be supplemented, and the upper surface of the platform coincides with the line to be supplemented on the clamping plate.

[0038] The laser target is specifically the laser target ball 4, and the laser equipment used in Step 4 is the laser tracker.

[0039] In Step 4, the selected fiducial point is the tooling TB seat that can be swept and recognized by the same laser equipment as all the laser target points.

[0040] In Step 4, the selected fiducial point is the clamping plate OTP point that can be swept and recognized by the same laser equipment as all the laser target points.

[0041] The reference platform for scribing is specifically the angle block 1. The angle block 1 has an L-shaped cross-section. Its upper surface is a precision-machined plane, and its side surface is the surface that fits on the clamping plate. The precision of the side surface is not lower than that of the clamping plate. The side surface of the angle block 1 is provided with a fixing structure for connecting to the clamping plate.

[0042] The connection and fixing structure specifically includes: the side surface of the angle block 1 is provided with a kidney-shaped hole, and the hook bolt 2 passes through the kidney-shaped hole and is threadedly connected to the handle nut 3; when the side surface of the angle block 1 is fitted on the clamping plate, the hook of the hook bolt 2 is stuck at the edge of the clamping plate, and by tightening the handle nut 3, the angle block 1 is relatively fixed to the clamping plate.

[0043] The kidney-shaped holes on the side surface of the angle block 1 are at least two kidney-shaped holes arranged at equal intervals, and the long hole direction of the kidney-shaped holes is perpendicular to the scribed edge of the upper surface of the angle block 1.

[0044] There are four laser detection holes, and the four laser detection holes are respectively arranged at the four corners of the upper surface of the angle block 1.

[0045] A method for scribing the clamping plate of an aircraft assembly tooling according to the present invention will be described in detail with reference to the accompanying drawings. The steps are as follows:

[0046] Step 1: As Figure 1As shown in the figure, a 3D digital model of the angle seat 1 is established. On one of the outer right-angled surfaces of the angle seat 1, at least 3 laser detection holes are designed for placing the laser target ball 5. On the other surface of the angle seat 1, kidney-shaped holes arranged at equal intervals are designed for clamping cardboards with different widths, and the arrangement direction is horizontal.

[0047] Step 2: As Figure 2 shown in the figure, mark the positions of the laser target balls 5 on the digital model of the angle seat 1, and assemble the digital model of the angle seat 1 onto the digital model of the assembly tooling 7. The assembly method is as follows: ① The outer right-angled surface of the angle seat 1 with equally spaced kidney-shaped holes fits the plane of the cardboard 4 where the engraved lines need to be supplemented; ② The intersection line of the two outer right-angled surfaces of the angle seat 1 coincides with the engraved lines that need to be supplemented on the cardboard 7.

[0048] Step 3: Measure the coordinate values of the laser target balls 5 in the coordinate system designed for the tooling.

[0049] Step 4: The two outer right-angled surfaces of the angle seat 1 are processed into finish-machined surfaces. The surface roughness requirement is 1.6, the flatness requirement is 0.05 mm, the perpendicularity requirement is 0.05 mm, and the hole position tolerance of the laser holes on the angle seat is ±0.05 mm, meeting the engraving requirement of the position tolerance of the cardboard engraved lines of ±0.2 mm.

[0050] Step 5: As Figure 3 shown in the figure, use a laser tracker to select a suitable OTP point 7 on the TB seat 6 or the cardboard on the assembly tooling 7 as the reference to establish a coordinate system. Place the laser target balls into the laser detection holes on the angle seat 1 respectively. Adjust the angle seat 1 to the correct position according to the coordinate values of the laser target balls 5 measured in Step 3, and fix the angle seat 1 to the cardboard using the hook bolts 2 and handle nuts.

[0051] Step 6: The intersection line of the two outer right-angled surfaces of the angle seat 1 is the position where the engraved lines need to be supplemented. Manually complete the supplementation of the engraved lines using a scriber, and the supplemented engraved lines can meet the accuracy requirements of the position tolerance and meet the production requirements.

Claims

1. A method for engraving lines on an aircraft assembly tooling template, characterized in that, It includes the following steps: Step 1: Prepare a reference platform for scribing, and establish the 3D digital model of this platform; Step 2: Set at least three laser detection holes on the solid upper surface of the platform for placing laser targets, mark the positions of the laser targets on the 3D digital model of the platform, and then install the digital model of the platform on the digital model of the tooling; Step 3: Measure the coordinate values of the laser targets in the design coordinate system of the tooling; Step 4: Use a laser device to select a fiducial point on the solid of the tooling to establish a coordinate system, place the laser targets in the laser detection holes of the platform, adjust the positions of the laser targets according to the coordinate values obtained in Step 3, and then fix the platform; Step 5: Use the intersection line of the upper surface of the platform and the clamping plate as the standard for scribing.

2. A method for engraving lines on an aircraft assembly tooling template according to claim 1, characterized in that, In Step 2, when the digital model of the platform is installed on the digital model of the tooling, the side surface of the platform fits the surface of the clamping plate where the scribing needs to be supplemented, and the upper surface of the platform coincides with the scribing to be supplemented on the clamping plate.

3. A method for engraving lines on an aircraft assembly tooling template according to claim 1, characterized in that, The laser target is specifically a laser target ball (4), and the laser device used in Step 4 is a laser tracker.

4. A method for engraving lines on an aircraft assembly tooling template according to claim 1, characterized in that In Step 4, the selected fiducial point is the tooling TB seat that can be scanned and recognized by the same laser device as all laser target points.

5. A method for engraving the lines of an aircraft assembly tooling template according to claim 1, characterized in that, In Step 4, the selected fiducial point is the clamping plate OTP point that can be scanned and recognized by the same laser device as all laser target points.

6. A method for engraving lines on an aircraft assembly tooling template according to claim 1, characterized in that, The reference platform for scribing is specifically an angle seat (1). The angle seat (1) is a structure with an L-shaped cross-section. Its upper surface is a precision-machined plane, and the side surface is the surface that fits on the clamping plate. The machining precision of the side surface is not lower than that of the clamping plate; the side surface of the angle seat (1) is provided with a fixing structure for connecting with the clamping plate.

7. A method for engraving lines on an aircraft assembly tooling clamping plate according to claim 6, characterized in that, The connection and fixing structure specifically includes: the side surface of the angle seat (1) is provided with kidney-shaped holes, and the hook-shaped bolt (2) passes through the kidney-shaped holes and is threadedly connected with the handle nut (3); when the side surface of the angle seat (1) fits on the clamping plate, the hook of the hook-shaped bolt (2) is stuck at the edge of the clamping plate, and by tightening the handle nut (3), the angle seat (1) is relatively fixed with the clamping plate.

8. A method for engraving lines on an aircraft assembly tooling template according to claim 6, characterized in that, The kidney-shaped holes on the side surface of the angle seat (1) are at least two kidney-shaped holes arranged at equal intervals, and the long hole direction of the kidney-shaped holes is perpendicular to the scribing edge of the upper surface of the angle seat (1).

9. A method for engraving lines on an aircraft assembly tooling card board according to claim 6, characterized in that, There are four laser detection holes, and the four laser detection holes are respectively arranged at the four corners of the upper surface of the angle seat (1).

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