High-adaptability sheet metal part milling and drilling integrated device and using method thereof

Abstract

The invention discloses a high-adaptability sheet metal part milling and drilling integrated device and a using method thereof, and belongs to the technical field of manufacturing of aircraft sheet metal parts. The device mainly comprises a tire body, a cover plate, a base, a rotating shaft, a trolley and other main body parts. The using method of the device comprises the steps that firstly, two sheet metal parts are placed between the tire body and the cover plate, are positioned through the plug pins and then are clamped through the arch-shaped clamps; and secondly, drilling is conducted on the two fixed sheet metal parts through the fixing drill bushings, and tensioning and fixing are conducted through appropriate screws. And thirdly, the arch-shaped clamp is dismantled, and the outer edge contours of the two sheet metal parts are milled at the same time through a pneumatic milling cutter. And fourthly, the edges of the two sheet metal parts are trimmed. The device can solve the problem that the edge line profile tolerance and the hole coaxiality cannot meet the high matching requirement after sheet metal parts are separately machined due to the tolerance bandwidth, is easy to operate, improves the matching precision, reduces the production cost and is worthy of being popularized in the airplane sheet metal manufacturing industry.

Description

Technical Field

[0001] The invention relates to a high-matching sheet metal part milling and drilling integrated device and a use method thereof, belonging to the technical field of manufacturing aircraft sheet metal parts. Background Art

[0002] Statistics show that sheet metal parts account for about 50% of aircraft, and many of these sheet metal parts require a high degree of fit during assembly. However, due to the forming process characteristics of sheet metal parts, the tolerance bands for some complex parts are relatively wide, making it difficult to achieve high precision requirements. Therefore, when they fit together, they cannot meet the precise fit requirements. Usually, the fit that is most concerned during assembly is the outer edge contour and hole coaxiality of the parts.

[0003] Traditional sheet metal parts processing methods are all single-piece processing. In order 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 equipment CNC processing to replace manual processing, which invisibly increases the processing difficulty of parts and increases the production cost of parts. Summary of the invention

[0004] The purpose of the present invention is to provide a high-fit sheet metal parts milling and drilling device and a method for using the device, which ensures the outer edge profile accuracy and hole coaxiality accuracy of the sheet metal parts through the coordinated milling and hole making of the high-fit sheet metal parts. At the same time, a set of devices replaces the original single-piece processing requirements of multiple sets of molds and equipment, thereby improving the matching accuracy of sheet metal parts and reducing production costs. It solves the problem that the edge line profile and hole coaxiality of sheet metal parts cannot meet high matching requirements after separate processing.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A high-matching sheet metal parts milling and drilling device, the device includes a carcass 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, a bow clamp 9, an angle seat 10, a frame 11, a first fixed drill sleeve 12, a second fixed drill sleeve 13, a cylindrical plug with a fixed handle 14, an 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 plug 22. The details are as follows:

[0007] The cover plate 2 and the carcass 1 are gap-assembled through two latches 22 and the first fixed drill sleeve 12 to fix the relative position of the cover plate and the carcass, and then the profile is clamped using the bow clamp 9. This structure can meet the requirements of high-fitting two-layer parts being fixed between the carcass 1 and the cover plate 2 at the same time through the latch 22, and the bow clamp 9 can ensure 100% fit. The outer contours of the carcass 1 and the cover plate 2 are consistent with the theoretical outer contours of the parts, and the outer contours of the parts can be accurately milled along the outer end faces of the carcass 1 and the cover plate 2, ensuring the consistency of the outer contours of the high-fitting sheet metal parts.

[0008] The tire body 1 is fixed to the first rotating shaft 5 and the second rotating shaft 7 through a threaded connection with an angle seat 10 and a first screw 16. The first rotating shaft 5, the second rotating shaft 7, the supporting indexing seat 6 and the support 8 are installed as a whole through bearings. Then the supporting indexing seat 6 and the support 8 are limited by the first cylindrical pin 19 with the base 4, and finally assembled by threaded locking with the second screw 17.

[0009] The cylindrical latch 14 with a fixed handle is fixed with the clearance of the matching hole of the supporting indexing seat 6, so that the position of the tire body 1 and the cover plate 2 is fixed after being flipped by the first rotating shaft 5 and the second rotating shaft 7, which solves the inconvenience of milling at different angles from the perspective of ergonomics.

[0010] The reference block 3 and the base 4 are first limited by the clearance fit of the second cylindrical pin 20, and then assembled by thread locking by the third screw 18, and the tool ball sleeve 21 is threadedly locked on the reference block 3. The tool ball sleeve 21 on the reference block 3 is used for the design and measurement benchmark of the device to ensure the calibration of the device.

[0011] The second fixed drill sleeve 13 is installed on the cover plate 2 in an over-fitting manner and is used for synchronous drilling of high-fit sheet metal parts, thereby ensuring the consistency of hole position and coaxiality of the parts.

[0012] Finally, it is lifted and placed on the frame vehicle 11 through the eye screw 15 and limited by the block.

[0013] A method for using a high-matching sheet metal part milling and drilling device, comprising the following steps:

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

[0015] The second step is to check whether the second cylindrical pin 20 and the third screw 18 that 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. Check whether the first cylindrical pin 19 and the second screw 17 that fix the supporting indexing seat 6 and the support 8 to the base 4 are loose. Check whether the first screw 16 on the angle seat 10 is loose. Check whether the eye screw 15 on the base 4 is loose.

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

[0017] The fourth step is to check whether the bow card 9 is intact. Check whether the first fixed drill sleeve 12 and the second fixed drill sleeve 13 on the cover plate 2 fall off and whether the hole diameter is qualified.

[0018] In the fifth step, two sheet metal parts with high matching degree are placed between the carcass 1 and the cover plate 2 according to the matching relationship, and the carcass 1, the cover plate 2 and the sheet metal parts with high matching degree are installed into the first fixed drill sleeve 12 by means of the latch 22 for positioning. The carcass 1, the sheet metal parts with high matching degree and the cover plate 2 are clamped by using the arch clamp 9 to act on the lower surface of the carcass 1 and the upper surface of the cover plate 2 respectively.

[0019] In the sixth step, two sheet metal parts with a high degree of fit are drilled with holes through the second fixed drill sleeve 13 on the cover plate 2, and tool pins are used for positioning.

[0020] In the seventh step, a pneumatic milling cutter is used to mill the outer edge contours of the two high-fitting sheet metal parts. During the milling process, the second rotating shaft 7 is flipped and fixed by a cylindrical latch 14 with a fixed handle to improve the convenience of operation.

[0021] The beneficial effects of the present invention are:

[0022] The present invention realizes the milling and hole making of high-fit sheet metal parts through a set of devices, which solves the problem that the edge line contour and hole coaxiality of sheet metal parts cannot meet the high-fit requirements after separate processing due to the tolerance bandwidth. In addition, the device is easy to operate, improves the fitting accuracy, and reduces the production cost, and is worthy of promotion in the aircraft sheet metal manufacturing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of high-fit sheet metal parts for aircraft.

[0024] Figure 2 This is the AA section view of a high-fit sheet metal part of an aircraft.

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

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

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

[0028] Shown in the figure: 1 carcass, 2 cover plate, 3 reference block, 4 base, 5 first rotating shaft, 6 supporting indexing seat, 7 second rotating shaft, 8 support, 9 bow clamp, 10 angle seat, 11 carriage, 12 first fixed drill sleeve, 13 second fixed drill sleeve, 14 cylindrical latch with fixed handle, 15 lifting eye screw, 16 first screw, 17 second screw, 18 third screw, 19 first cylindrical pin, 20 second cylindrical pin, 21 tool ball sleeve, 22 latch. DETAILED DESCRIPTION

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

[0030] A high-matching sheet metal parts milling and drilling device, the device includes a carcass 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, a bow clamp 9, an angle seat 10, a frame 11, a first fixed drill sleeve 12, a second fixed drill sleeve 13, a cylindrical latch with a fixed handle 14, an 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 latch 22. The details are as follows:

[0031] The cover plate 2 and the carcass 1 are gap-assembled through two pins 22 with a diameter of φ5.2 mm and the first fixed drill sleeve 12 to fix the relative position of the cover plate and the carcass, and then the profile is clamped using the bow clamp 9. This structure can meet the requirements of high-fitting two-layer parts being fixed between the carcass 1 and the cover plate 2 at the same time through the pins 22, and the 100% fit is guaranteed by the bow clamp 9. The outer contours of the carcass 1 and the cover plate 2 are consistent with the theoretical outer contours of the parts, and the outer contours of the parts can be accurately milled along the outer end faces of the carcass 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 through a threaded connection with an angle seat 10 and a first screw 16. The first rotating shaft 5, the second rotating shaft 7, the supporting indexing seat 6 and the support 8 are installed as a whole through bearings. Then the supporting indexing seat 6 and the support 8 are limited by the first cylindrical pin 19 with the base 4, and finally assembled by threaded locking with the second screw 17.

[0033] The cylindrical latch 14 with a fixed handle is fixed with the clearance of the matching hole of the supporting indexing seat 6, so that the position of the tire body 1 and the cover plate 2 is fixed after being flipped by the first rotating shaft 5 and the second rotating shaft 7, which solves the inconvenience of milling at different angles from the perspective of ergonomics.

[0034] The reference block 3 and the base 4 are first limited by the clearance fit of the second cylindrical pin 20, and then assembled by thread locking by the third screw 18, and the tool ball sleeve 21 is threadedly locked on the reference block 3. The tool ball sleeve 21 on the reference block 3 is used for the design and measurement benchmark of the device to ensure the calibration of the device.

[0035] The second fixed drill sleeve 13 is installed on the cover plate 2 in an over-fitting manner and is used for synchronous drilling of high-fit sheet metal parts, thereby ensuring the consistency of hole position and coaxiality of the parts.

[0036] Finally, it is lifted and placed on the frame vehicle 11 through the eye screw 15 and limited by the block.

[0037] Taking ergonomics into consideration, the optimal overall height of the device is 850 mm. Considering the service life of the device, the material of the carcass 1 and the cover plate 2 is 45# steel.

[0038] A method for using a high-matching sheet metal part milling and drilling device, comprising the following steps:

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

[0040] The second step is to check whether the second cylindrical pin 20 and the third screw 18 that 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. Check whether the first cylindrical pin 19 and the second screw 17 that fix the supporting indexing seat 6 and the support 8 to the base 4 are loose. Check whether the first screw 16 on the angle seat 10 is loose. Check whether the eye screw 15 on the base 4 is loose.

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

[0042] The fourth step is to check whether the bow card 9 is intact. Check whether the first fixed drill sleeve 12 and the second fixed drill sleeve 13 on the cover plate 2 fall off and whether the hole diameter is qualified.

[0043] In the fifth step, two sheet metal parts with high matching degree are placed between the carcass 1 and the cover plate 2 according to the matching relationship, and the carcass 1, the cover plate 2 and the sheet metal parts with high matching degree are installed into the first fixed drill sleeve 12 by means of the latch 22 for positioning. The carcass 1, the sheet metal parts with high matching degree and the cover plate 2 are clamped by using the arch clamp 9 to act on the lower surface of the carcass 1 and the upper surface of the cover plate 2 respectively.

[0044] In the sixth step, two sheet metal parts with a high degree of fit are drilled with holes through the second fixed drill sleeve 13 on the cover plate 2, and tool pins are used for positioning.

[0045] In the seventh step, a pneumatic milling cutter is used to mill the outer edge contours of the two high-fitting sheet metal parts. During the milling process, the second rotating shaft 7 is flipped and fixed by a cylindrical latch 14 with a fixed handle to improve the convenience of operation.

[0046] 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 high-matching sheet metal parts milling and drilling device, characterized in that: The high-matching sheet metal parts milling and drilling device comprises a carcass (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), a bow clamp (9), an angle seat (10), a frame (11), a first fixed drill sleeve (12), a second fixed drill sleeve (13), a cylindrical latch 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 latch (22); the details are as follows: The cover plate (2) and the carcass (1) are gap-assembled via a latch (22) and a first fixed drill sleeve (12) to achieve relative position fixation of the cover plate and the carcass, and the profile is clamped via an arch clamp (9); The carcass (1) is connected and fixed to the first rotating shaft (5) and the second rotating shaft (7) through an angle seat (10) and a first screw (16); the first rotating shaft (5), the second rotating shaft (7) and the supporting indexing seat (6) and the support (8) are installed as a whole through bearings; the supporting indexing seat (6) and the support (8) are limited by the first cylindrical pin (19) and finally assembled by thread locking with the second screw (17); The cylindrical latch pin (14) with a fixed handle is fixedly matched with the matching hole of the supporting indexing seat (6) through clearance, so that the position of the carcass (1) and the cover plate (2) is fixed after being turned over 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 clearance fit of the second cylindrical pin (20), and then assembled by thread locking through the third screw (18), and the tool ball sleeve (21) is thread locked on the reference block (3); The device is hoisted and placed on a trolley (11) by means of a lifting eye screw (15) and is limited in position by means of a stopper.

2. The high-matching sheet metal parts milling and drilling device according to claim 1, characterized in that: The outer contours of the carcass (1) and the cover plate (2) are consistent with the theoretical outer contours of the parts, and the outer contours of the parts can be accurately milled along the outer end faces of the carcass (1) and the cover plate (2), thereby ensuring the consistency of the outer contours of the high-fitting sheet metal parts.

3. The high-matching sheet metal parts milling and drilling device according to claim 1, characterized in that: The tool ball sleeve (21) on the reference block (3) is used for designing and measuring the reference of the device.

4. The high-matching sheet metal parts milling and drilling device according to claim 1, characterized in that: The second fixed drill sleeve (13) is installed on the cover plate (2) in an over-fitting manner and is used for synchronous drilling of high-fit sheet metal parts to ensure the consistency of the hole position and coaxiality of the parts.

5. A method for using the high-matching sheet metal parts milling and drilling device according to any one of claims 1 to 4, characterized in that: The following steps are involved: The first step is to check the carriage (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 device is tight; The third step is to check whether the carcass (1) can be turned over by the first rotating shaft (5) and the second rotating shaft (7); Step 4: Check whether the bow-shaped card (9) is intact; check whether the first fixed drill sleeve (12) and the second fixed drill sleeve (13) on the cover plate (2) are detached, and whether the hole diameter is qualified; In the fifth step, two sheet metal parts with a high degree of fit are placed between the carcass (1) and the cover plate (2) according to the fitting relationship, and the carcass (1), the cover plate (2) and the sheet metal parts with a high degree of fit are installed in the first fixed drill sleeve (12) with clearance fit by means of a latch (22) for positioning; an arch clamp (9) is used to act on the lower surface of the carcass (1) and the upper surface of the cover plate (2) respectively to clamp the carcass (1), the sheet metal parts with a high degree of fit and the cover plate (2); Step 6: drilling holes in the two sheet metal parts with a high degree of fit through the second fixed drill sleeve (13) on the cover plate (2), and limiting them with tool pins; In the seventh step, a pneumatic milling cutter is used to mill the outer edge contours of the two high-matching sheet metal parts. During the milling process, the second rotating shaft (7) is flipped and fixed by a cylindrical latch (14) with a fixed handle.

6. The method for using the high-matching sheet metal parts milling and drilling device according to claim 5, characterized in that: The second step specifically includes: checking 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; checking whether the first cylindrical pin (19) and the second screw (17) fixing the supporting indexing seat (6) and the support (8) and the base (4) are loose; checking whether the first screw (16) on the angle seat (10) is loose; and checking whether the eye screw (15) on the base (4) is loose.

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