A high-compatibility milling and drilling integrated device for sheet metal parts and a method of using the same

Abstract

A kind of high degree of fit sheet metal parts milling and drilling integrated device and its using method belong to the manufacturing technical field of aircraft sheet metal parts. Mainly include: matrix, cover plate, base, shaft, frame car etc. The using method of the device: first step, two sheet metal parts are placed between matrix and cover plate, positioning is carried out by bolt, then using arc clamp is tightened. Second step, the two sheet metal parts that have been fixed are drilled by fixed drill bushing, and are fixed by using suitable screw. Third step, remove arc clamp, use air milling cutter to mill the contour of the two sheet metal parts at the same time. Fourth step, the edge of the two sheet metal parts is trimmed. The present application can solve the problem that the edge line contour and hole coaxiality of sheet metal parts cannot meet the high fitting requirement after separate processing due to tolerance bandwidth, and the device is simple to operate, improves the fitting accuracy, reduces the production cost, and is worth popularizing in the aircraft sheet metal manufacturing industry.

Description

Technical Field

[0001] This invention relates to a milling and drilling integrated device for high-fit sheet metal parts and its usage method, belonging to the field of aircraft sheet metal manufacturing technology. Background Technology

[0002] Statistical data shows that sheet metal parts account for about 50% of aircraft components, and many of these parts require a high degree of fit during assembly. However, due to the forming process characteristics of sheet metal parts, the tolerances for some complex parts are relatively wide, making it difficult to meet high precision requirements. Therefore, precise fit requirements cannot be met when parts are mated together. The most important fit parameters during assembly are usually the outer edge profile of the parts and the coaxiality of the holes.

[0003] Traditional sheet metal parts processing methods involve single-piece processing. To meet the high degree of fit required for assembly, it is necessary to improve the processing accuracy of each part and use special molds and CNC machining equipment to replace manual processing. This inevitably increases the processing difficulty of the parts and raises the production cost of the parts. Summary of the Invention

[0004] The purpose of this invention is to provide a high-fitness sheet metal parts milling and drilling integrated device and its usage method. By coordinating the milling and drilling of high-fitness sheet metal parts, the device ensures the accuracy of the outer edge contour and the coaxiality of the holes. Simultaneously, by replacing the need for multiple sets of molds and equipment for single-part processing with a single device, the device improves the fit accuracy of sheet metal parts and reduces production costs. It solves the problem that the edge contour and hole coaxiality of sheet metal parts cannot meet the high-fit requirements after separate processing.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A high-fitness sheet metal parts milling and drilling integrated device, comprising a body 1, a cover plate 2, a reference block 3, a base 4, a first rotating shaft 5, a supporting indexing seat 6, a second rotating shaft 7, a support 8, an arc-shaped clamp 9, an angle seat 10, a frame 11, a first fixed drill sleeve 12, a second fixed drill sleeve 13, a cylindrical pin with a fixed handle 14, a lifting eye screw 15, a first screw 16, a second screw 17, a third screw 18, a first cylindrical pin 19, a second cylindrical pin 20, a tool ball sleeve 21, and a pin 22. Details are as follows:

[0007] The cover plate 2 and the body 1 are fitted with the first fixed drill sleeve 12 through two pins 22 to fix their relative positions. Then, an arc-shaped clamp 9 is used to clamp the surfaces. This structure allows two highly fitted parts to be simultaneously fixed between the body 1 and the cover plate 2 via pins 22, and the arc-shaped clamp 9 ensures 100% fit. The outer contours of the body 1 and the cover plate 2 are consistent with the theoretical outer contours of the parts, allowing for precise milling of the parts' outer contours along the outer end faces of the body 1 and the cover plate 2, ensuring the consistency of the outer contours of the highly fitted sheet metal parts.

[0008] The tire body 1 is fixed to the first rotating shaft 5 and the second rotating shaft 7 by means of the corner seat 10 and the first screw 16. The first rotating shaft 5, the second rotating shaft 7, the supporting indexing seat 6 and the support 8 are assembled together by means of bearings. Then the supporting indexing seat 6 and the support 8 are limited to the base 4 by means of the first cylindrical pin 19. Finally, the assembly is locked by means of the second screw 17.

[0009] The cylindrical pin 14 with a fixed handle is fixed in a clearance fit with the mating hole of the supporting indexing seat 6, so as to fix the position of the tire body 1 and the cover plate 2 after they are flipped by the first rotating shaft 5 and the second rotating shaft 7. From the perspective of ergonomics, this solves the problem of inconvenience in milling at different angles.

[0010] The reference block 3 and the base 4 are first positioned by a clearance fit using the second cylindrical pin 20, and then tightened by the threaded locking of the third screw 18. The tool ball sleeve 21 is threadedly locked onto the reference block 3. The tool ball sleeve 21 on the reference block 3 serves as a design and measurement reference for the device, ensuring its calibration.

[0011] The second fixed drill sleeve 13 is fitted onto the cover plate 2 with an overfit, and is used for synchronous drilling of sheet metal parts with high fit, ensuring the consistency of hole position and coaxiality of the parts.

[0012] Finally, it is lifted and placed onto the frame 11 using eye bolts 15, and then stopped by a stop block.

[0013] A method for using a high-fitness sheet metal parts milling and drilling integrated device includes the following steps:

[0014] The first step is to check whether the steering wheels, blocks, and other accessories of the frame 11 are loose or damaged, and then move it to an open position for processing.

[0015] The second step involves checking whether the second cylindrical pin 20 and the third screw 18, which fix the reference block 3 to the base 4, are loose, and whether the tool ball sleeve 21 on the reference block 3 is loose. Next, check whether the first cylindrical pin 19 and the second screw 17, which fix the indexing seat 6 and the support 8 to the base 4, are loose. Then, check whether the first screw 16 on the angle bracket 10 is loose. Finally, check whether the eye bolt 15 on the base 4 is loose.

[0016] The third step is to check whether the tire body 1 can be flipped over by the first rotating shaft 5 and the second rotating shaft 7.

[0017] Fourth step, check if the bow-shaped clip 9 is intact. Check if the first fixed drill sleeve 12 and the second fixed drill sleeve 13 on the cover plate 2 have fallen off, and whether the hole diameter is qualified.

[0018] Fifth, place the two highly fitted sheet metal parts between the jig body 1 and the cover plate 2 according to their mating relationship. Use the pin 22 to install the jig body 1, cover plate 2, and highly fitted sheet metal parts into the first fixed drill sleeve 12 for positioning with a clearance fit. Use the bow-shaped clamps 9 to clamp the jig body 1, the highly fitted sheet metal parts, and the cover plate 2 on the lower surface of the jig body 1 and the upper surface of the cover plate 2 respectively.

[0019] The sixth step is to drill holes in the two sheet metal parts with a high degree of fit using the second fixed drill sleeve 13 on the cover plate 2, and to use tool pins for limiting the position.

[0020] Step 7: Use a pneumatic milling cutter to mill the outer contours of the two sheet metal parts with high fit. During the milling process, the second rotating shaft 7 is flipped and fixed by a cylindrical pin 14 with a fixed handle to improve the ease of operation.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention enables the milling and hole making of high-fit sheet metal parts through a set of devices, solving the problem that the edge contour and hole coaxiality of sheet metal parts cannot meet the high-fit requirements after separate processing due to the wide tolerance range. Moreover, the device is simple to operate, improves the fit accuracy, and reduces the production cost, making it worthy of promotion in the aircraft sheet metal manufacturing industry. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of a high-fitting sheet metal part for an aircraft.

[0024] Figure 2 This is a sectional view along the AA direction of a high-fitting sheet metal part for an aircraft.

[0025] Figure 3 This is a front view of the device structure of the present invention.

[0026] Figure 4 This is a top view of the device structure of the present invention.

[0027] Figure 5 This is a left view of the device structure of the present invention.

[0028] The following components are shown in the diagram: 1. Carcass, 2. Cover plate, 3. Reference block, 4. Base, 5. First pivot, 6. Support indexing seat, 7. Second pivot, 8. Support, 9. Bow-shaped clamp, 10. Angle seat, 11. Carriage, 12. First fixed drill sleeve, 13. Second fixed drill sleeve, 14. Cylindrical pin with fixed handle, 15. Eye bolt, 16. First screw, 17. Second screw, 18. Third screw, 19. First cylindrical pin, 20. Second cylindrical pin, 21. Tool ball sleeve, 22. Pin. Detailed Implementation

[0029] To further illustrate the concept of the present invention, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0030] A high-fitness sheet metal parts milling and drilling integrated device, comprising a body 1, a cover plate 2, a reference block 3, a base 4, a first rotating shaft 5, a supporting indexing seat 6, a second rotating shaft 7, a support 8, an arc-shaped clamp 9, an angle seat 10, a frame 11, a first fixed drill sleeve 12, a second fixed drill sleeve 13, a cylindrical pin with a fixed handle 14, a lifting eye screw 15, a first screw 16, a second screw 17, a third screw 18, a first cylindrical pin 18, a second cylindrical pin 20, a tool ball sleeve 21, and a pin 22. Details are as follows:

[0031] The cover plate 2 and the body 1 are fitted together with the first fixed drill sleeve 12 through two φ5.2mm diameter pins 22, achieving relative position fixation between the cover plate and the body. Then, an arc-shaped clamp 9 is used to clamp the profile. This structure allows for the simultaneous fixing of two high-fitting parts between the body 1 and the cover plate 2 via the pins 22, and ensures 100% fit through the arc-shaped clamp 9. The outer contours of the body 1 and the cover plate 2 are consistent with the theoretical outer contours of the parts, allowing for precise milling of the parts' outer contours along the outer end faces of the body 1 and the cover plate 2, ensuring the consistency of the outer contours of the high-fitting sheet metal parts.

[0032] The tire body 1 is fixed to the first rotating shaft 5 and the second rotating shaft 7 by means of the corner seat 10 and the first screw 16. The first rotating shaft 5, the second rotating shaft 7, the supporting indexing seat 6 and the support 8 are assembled together by means of bearings. Then the supporting indexing seat 6 and the support 8 are limited to the base 4 by means of the first cylindrical pin 19. Finally, the assembly is locked by means of the second screw 17.

[0033] The cylindrical pin 14 with a fixed handle is fixed in a clearance fit with the mating hole of the supporting indexing seat 6, so as to fix the position of the tire body 1 and the cover plate 2 after they are flipped by the first rotating shaft 5 and the second rotating shaft 7. From the perspective of ergonomics, this solves the problem of inconvenience in milling at different angles.

[0034] The reference block 3 and the base 4 are first positioned by a clearance fit using the second cylindrical pin 20, and then tightened by the threaded locking of the third screw 18. The tool ball sleeve 21 is threadedly locked onto the reference block 3. The tool ball sleeve 21 on the reference block 3 serves as a design and measurement reference for the device, ensuring its calibration.

[0035] The second fixed drill sleeve 13 is fitted onto the cover plate 2 with an overfit, and is used for synchronous drilling of sheet metal parts with high fit, ensuring the consistency of hole position and coaxiality of the parts.

[0036] Finally, it is lifted and placed onto the frame 11 using eye bolts 15, and then stopped by a stop block.

[0037] Taking ergonomics into consideration, the optimal overall height of the device is 850mm. Considering the lifespan of the device, the materials for the body 1 and the cover plate 2 are 45# steel.

[0038] A method for using a high-fitness sheet metal parts milling and drilling integrated device includes the following steps:

[0039] The first step is to check whether the steering wheels, blocks, and other accessories of the frame 11 are loose or damaged, and then move it to an open position for processing.

[0040] The second step involves checking whether the second cylindrical pin 20 and the third screw 18, which fix the reference block 3 to the base 4, are loose, and whether the tool ball sleeve 21 on the reference block 3 is loose. Next, check whether the first cylindrical pin 19 and the second screw 17, which fix the indexing seat 6 and the support 8 to the base 4, are loose. Then, check whether the first screw 16 on the angle bracket 10 is loose. Finally, check whether the eye bolt 15 on the base 4 is loose.

[0041] The third step is to check whether the tire body 1 can be flipped over by the first rotating shaft 5 and the second rotating shaft 7.

[0042] Fourth step, check if the bow-shaped clip 9 is intact. Check if the first fixed drill sleeve 12 and the second fixed drill sleeve 13 on the cover plate 2 have fallen off, and whether the hole diameter is qualified.

[0043] Fifth, place the two highly fitted sheet metal parts between the jig body 1 and the cover plate 2 according to their mating relationship. Use the pin 22 to install the jig body 1, cover plate 2, and highly fitted sheet metal parts into the first fixed drill sleeve 12 for positioning with a clearance fit. Use the bow-shaped clamps 9 to clamp the jig body 1, the highly fitted sheet metal parts, and the cover plate 2 on the lower surface of the jig body 1 and the upper surface of the cover plate 2 respectively.

[0044] The sixth step is to drill holes in the two sheet metal parts with a high degree of fit using the second fixed drill sleeve 13 on the cover plate 2, and to use tool pins for limiting the position.

[0045] Step 7: Use a pneumatic milling cutter to mill the outer contours of the two sheet metal parts with high fit. During the milling process, the second rotating shaft 7 is flipped and fixed by a cylindrical pin 14 with a fixed handle to improve the ease of operation.

[0046] The above-described embodiments are merely illustrative of the implementation methods of the present invention, but should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A high-fitness sheet metal parts milling and drilling integrated device, characterized in that, The high-fitness sheet metal parts milling and drilling integrated device includes a jig (1), a cover plate (2), a reference block (3), a base (4), a first rotating shaft (5), a support indexing seat (6), a second rotating shaft (7), a support (8), an arc-shaped clamp (9), an angle seat (10), a frame (11), a first fixed drill sleeve (12), a second fixed drill sleeve (13), a cylindrical pin with a fixed handle (14), a lifting eye screw (15), a first cylindrical pin (19), a second cylindrical pin (20), a tool ball sleeve (21), and a pin (22); specifically as follows: The cover plate (2) and the body (1) are fitted with the first fixed drill sleeve (12) through a gap by a pin (22) to fix the relative position of the cover plate and the body, and are clamped by a bow-shaped clip (9); the two high-fit parts are simultaneously fixed between the body (1) and the cover plate (2) by a pin (22). The tire body (1) is connected and fixed to the first rotating shaft (5) and the second rotating shaft (7) through the corner seat (10) and the first screw (16). The first rotating shaft (5), the second rotating shaft (7), the support indexing seat (6) and the support (8) are assembled into one unit through bearing installation. The support indexing seat (6) and the support (8) are limited to the base (4) through the first cylindrical pin (19). Finally, the assembly is locked by the second screw (17). The cylindrical pin (14) with a fixed handle is fixed in a clearance fit with the mating hole of the supporting indexing seat (6), so as to fix the position of the tire body (1) and the cover plate (2) after they are flipped by the first rotating shaft (5) and the second rotating shaft (7); The reference block (3) and the base (4) are first limited by the gap fit of the second cylindrical pin (20), and then the assembly is locked by the thread of the third screw (18). The tool ball sleeve (21) is threadedly locked on the reference block (3). The high-fitness sheet metal parts milling and drilling integrated device is lifted and placed on the frame vehicle (11) by eye bolts (15) and limited by stop blocks; The outer contours of the body (1) and cover plate (2) are consistent with the theoretical outer contours of the parts. The outer contours of the parts can be precisely milled along the outer end faces of the body (1) and cover plate (2) to ensure the consistency of the outer contours of the high-fit sheet metal parts. The second fixed drill bushing (13) is fitted onto the cover plate (2) for synchronous drilling of sheet metal parts with high fit, ensuring the consistency of hole position and coaxiality of the parts.

2. The high-fitness sheet metal parts milling and drilling integrated device according to claim 1, characterized in that, The tool ball sleeve (21) on the reference block (3) is used as a reference for the design and measurement of the device.

3. A method of using the high-fitness sheet metal part milling and drilling integrated device according to any one of claims 1-2, characterized in that, Includes the following steps: The first step is to inspect the frame (11) and move it to an open position for processing; The second step is to check whether the installation of the high-fit sheet metal parts milling and drilling integrated device is secure. The third step is to check whether the tire body (1) can be flipped over by the first rotating shaft (5) and the second rotating shaft (7); Fourth step, check whether the bow-shaped clip (9) is intact; check whether the first fixed drill sleeve (12) and the second fixed drill sleeve (13) on the cover plate (2) have fallen off, and whether the hole diameter is qualified; Fifth step: Place the two sheet metal parts with high fit between the body (1) and the cover plate (2) according to their fit relationship. Use the pin (22) to install the body (1), the cover plate (2) and the sheet metal parts with high fit into the first fixed drill sleeve (12) for positioning. Use the bow-shaped clamp (9) to clamp the body (1), the sheet metal parts with high fit and the cover plate (2) on the lower surface of the body (1) and the upper surface of the cover plate (2). The sixth step is to drill holes in the two sheet metal parts with high fit through the second fixed drill sleeve (13) on the cover plate (2) and use tool pins for limiting; Step 7: Use a pneumatic milling cutter to mill the outer contours of the two sheet metal parts with high fit. During the milling process, the second rotating shaft (7) is flipped and fixed by a cylindrical pin (14) with a fixed handle.

4. The method of using the high-fitness sheet metal parts milling and drilling integrated device according to claim 3, characterized in that, The second step is specifically as follows: check whether the second cylindrical pin (20) and the third screw (18) fixing the reference block (3) and the base (4) are loose, and whether the tool ball sleeve (21) on the reference block (3) is loose; check whether the first cylindrical pin (19) and the second screw (17) fixing the support indexing seat (6) and the support (8) to the base (4) are loose; check whether the first screw (16) on the corner seat (10) is loose; check whether the eye bolt (15) on the base (4) is loose.

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