Airplane fuselage curved surface polishing device and method

Abstract

Aircraft body curved surface polishing device and method, including support frame, support column, slide, grinding machine adjusting seat and height indicating rod, four corner parts of support frame are installed with support column respectively, lower end of support column is installed with sucking disc, slide includes guide sleeve and slide plate, two guide sleeves are fixedly installed at both ends of slide plate, guide sleeve sliding guide is installed on support frame, multiple grinding machine adjusting seats are located at lower side of slide plate, grinding machine adjusting seats are hingedly connected with each other, and are elastically connected with slide through adjusting screw, height indicating rod is longitudinally installed on slide plate, and is located at both sides of grinding wheel adjusting seat. Adjusting screw is adjusted, so that lower side working surface of grinding machine is matched with curved surface of body. And support frame is adjusted through height indicating rod at both sides, so that support frame is matched with inclination of body surface, so that grinding machine can uniformly polish aircraft body with high precision when slide is pushed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft maintenance, and particularly relates to an aircraft body curved surface polishing device and method. BACKGROUND

[0002] The paint on the surface of the aircraft body needs to be repaired after being impacted, such as bird strike, hail or the emergence of aging cracks on the paint surface, which involves polishing the paint on the surface of the aircraft body.

[0003] Chinese patent document CN112192396A, published on January 8, 2021, discloses an aircraft outer surface paint removal polishing tool, which comprises a fixed plate and a polisher. The top of the fixed plate is detachably provided with a counterweight. The counterweight is connected with a connecting rod. The top end of the connecting rod is provided with a handle. A damping assembly is arranged between the connecting rod and the counterweight. The bottom of the fixed plate is provided with at least one connecting frame. The end of the connecting frame is hingedly connected with two clamping blocks. The two clamping blocks are mirror-symmetrically connected and clamp the neck of the polisher. A circular-arc-shaped clamping opening corresponding to the neck of the polisher is formed in the middle of the connecting end of the clamping block. Threaded holes are formed in the clamping block and mirror-symmetrically arranged on both sides of the clamping opening. Corresponding connecting screws are arranged in the threaded holes. The characteristic is that it can reduce the vibration generated during polishing operation, thereby reducing the labor intensity of the operator and increasing the comfort. The disadvantage is that the weight of the device is at the lower end of the polisher, which is inconvenient to use. The polisher cannot be smoothly pushed, and the curved surface structure of the aircraft surface cannot be adapted to the curved edge structure of the aircraft surface. In the disordered polishing process, the surface of the aircraft may be damaged.

[0004] In addition, Chinese patent document CN 211841447 U, published / announced on November 3, 2020, discloses an aircraft paint removal and polishing device. The two ends of the main beam plate are respectively connected to a first screw, the lower end of the first screw is fixedly connected to a suction cup, and the main beam plate is slidably connected to a trolley frame. The main beam plate has a strip-shaped through hole. The upper end of the second screw passes through the threaded through hole of the trolley frame and the long strip-shaped through hole of the main beam plate and is connected to a handwheel. The lower end is rotatably connected to a connecting frame, and the second screw is threadedly connected to the threaded through hole of the trolley frame. Both sides of the trolley frame are connected to a guide sleeve through ear plates. The guide sleeve has a guide through hole. The upper end of the connecting frame has two symmetrically distributed guide rods, the upper ends of which are inserted into the guide through holes of the guide sleeve. The lower end is connected to multiple polishing machines. Its advantages are that the sander can remove paint from aircraft simply by pushing the handle to move the sander back and forth, which improves work efficiency and reduces the labor intensity of the staff. Its disadvantages are that the sander cannot adapt to the curved surface structure of the aircraft body, cannot effectively sand curved surfaces, and the distance between the main beam plate and the surface of the aircraft body cannot be detected. During sanding, the sanding depth of the aircraft body surface is uneven, which may cause over-sanding and damage to the mask, or under-sanding. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to solve the problems existing in the above-mentioned background art and provide an aircraft body curved surface grinding device, which can grind the aircraft body curved surface with high precision.

[0006] Another technical problem to be solved by the present invention is to provide a method for grinding the curved surface of an aircraft body using the aforementioned aircraft body curved surface grinding device.

[0007] To achieve the aforementioned technical features, the present invention aims to provide an aircraft fuselage surface grinding device comprising a support frame, support columns, a slide block, a grinding wheel adjustment seat, and a height indicator rod. Support columns are installed at the four corners of the support frame, and the height of the support frame on the support columns is adjustable. A suction cup is installed at the lower end of each support column. The slide block includes guide sleeves and a sliding plate. Two guide sleeves are fixedly installed at both ends of the sliding plate, and the guide sleeves are slidably guided on the support frame. Multiple grinding wheel adjustment seats are located on the lower side of the sliding plate, and the grinding wheel adjustment seats are hinged together and elastically connected to the sliding plate via adjusting screws. A grinding wheel for grinding the fuselage is installed on the lower side of the grinding wheel adjustment seat. The height indicator rod is longitudinally installed on the sliding plate and located on both sides of the grinding wheel adjustment seat.

[0008] The support frame is a rectangular frame with adjustment holes at the four corners. After the support column passes through the adjustment holes, limit nuts are installed on the upper and lower sides of the adjustment holes respectively.

[0009] The adjusting hole is provided with a joint bearing, and the supporting column passes through the inner hole of the joint bearing.

[0010] The supporting column comprises a connecting seat and a supporting screw rod, the lower end of the connecting seat is connected with the suction cup, the supporting screw rod is located at the upper end of the connecting seat, and a limiting nut is mounted on the supporting screw rod.

[0011] The guide sleeve comprises a guide groove, the opening of the guide groove faces downward, a plurality of notches are arranged on the upper side of the guide groove, rollers are rotatably mounted in the notches, a cover plate is mounted at the opening of the lower side of the guide groove, a pressure adjusting plate is mounted on the upper side of the cover plate, a guide rod is fixedly arranged on the lower side of the pressure adjusting plate, the guide rod slidably passes through the cover plate, a spring is mounted between the pressure adjusting plate and the cover plate, a channel is formed between the pressure adjusting plate and the guide groove, and the guide sleeve is slidably mounted on the supporting frame through the channel.

[0012] A plurality of the grinding machine adjusting seats comprise a first adjusting seat and a second adjusting seat mounted on the two sides of the first adjusting seat respectively, the two sides of the first adjusting seat are hingedly connected with the second adjusting seat respectively, the adjusting screw rods comprise a plurality of first adjusting screw rods and a plurality of second adjusting screw rods, the first adjusting screw rods are hingedly mounted on the hinging points of the first adjusting seat and the second adjusting seat, the upper ends of the first adjusting screw rods pass through the first adjusting holes on the sliding plate, the first adjusting screw rods are provided with first stop washers below the sliding plate, the first adjusting screw rods are provided with first springs between the first stop washers and the sliding plate, and the upper side of the sliding plate is provided with first adjusting nuts.

[0013] The first adjusting seat comprises two first half rings and a first groove seat, the two ends of the two first half rings are connected by bolts, and the first half rings are used for clamping the grinding machine, the notch of the first groove seat faces downward, and the two first half rings are mounted at the notch of the first groove seat, the two sides of the first groove seat are respectively provided with two first hinging seats, the second adjusting seat comprises two second half rings and a second groove seat, the two ends of the two second half rings are connected by bolts, and the second half rings are used for clamping the grinding machine, the notch of the second groove seat faces downward, and the two second half rings are mounted at the notch of the second groove seat, one side of the second groove seat close to the first groove seat is provided with two second hinging seats, and the upper side of the second groove seat is provided with two third hinging seats, the first hinging seat is hingedly connected with the second hinging seat, the lower end of the first adjusting screw rod is provided with a U-shaped joint, the U-shaped joint is hingedly connected with the first hinging seat and the second hinging seat, and the lower end of the second adjusting screw rod is provided with a hinging ring, the hinging ring is hingedly connected with the third hinging seat.

[0014] The sliding seat is further provided with a handle, and the two ends of the handle are mounted on the guide sleeve respectively.

[0015] The height indicator rod includes a fixed sleeve and a telescopic rod. The fixed sleeve includes a mounting plate with a connecting hole. The mounting plate is fixedly connected to the lower side of the mounting plate. The bottom of the mounting sleeve has an inwardly facing flange. The telescopic rod is slidably installed inside the fixed sleeve. The telescopic rod has a limiting ring inside the fixed sleeve. A third spring is installed between the limiting ring and the mounting plate on the telescopic rod. The lower end of the telescopic rod has a smooth end, and the upper end of the telescopic rod has an annular scale. The fixed sleeve is installed on the lower side of the slide plate through the connecting hole. The upper end of the telescopic rod passes through a through hole on the slide plate.

[0016] A method for polishing curved surfaces of an aircraft fuselage using an aircraft fuselage polishing device includes the following steps:

[0017] S1. Mark and number defects on the surface of the aircraft fuselage;

[0018] S2. Move the grinding device to the location on the aircraft body that needs repair, fix the support column with the suction cup, and make the sliding direction of the slide block consistent with the length direction of the aircraft body;

[0019] S3. Adjust the position of the support frame by using the limit nut so that the grinding wheel does not contact the surface of the machine body, and the telescopic rod of the height indicator rod contacts the surface of the machine body;

[0020] S4. Push and pull the slide block and observe the circular scale on the telescopic rod. If the circular scale fluctuates greatly, adjust the height of the support frame through the limit nut until the difference between the upper and lower values ​​of the circular scale is within 0.5mm.

[0021] S5. Adjust the first adjusting nut so that the grinding wheel at the lower end of the first adjusting seat contacts the aircraft body, and then adjust the second adjusting nut so that the grinding wheel at the lower end of the second adjusting seat contacts the aircraft body, thereby adapting the lower working surface of each grinding wheel to the curved surface of the aircraft body.

[0022] S6. Start the grinding machine, push the slide, observe the grinding condition of the machine body surface, and further adjust the first and second adjusting nuts according to the grinding condition until the fan skin is exposed.

[0023] The present invention has the following beneficial effects:

[0024] 1. The support frame is used for supporting the sliding seat and enabling the sliding seat to slide smoothly along the support frame, the support column is used for supporting the support frame, enabling the sliding seat to be at a distance from the surface of the machine body, the grinding machine adjusting seat is used for mounting the grinding machine, and the grinding machine adjusting seat is elastically connected to the sliding plate through the adjusting screw, since the grinding machine adjusting seats are hingedly connected to each other, the adjusting screw can be adjusted according to the curved surface of the machine body, so that the lower working surface of the grinding machine is adapted to the curved surface of the machine body, and when the sliding seat is reciprocally pushed, the lower working surface of the grinding machine grinds the curved surface of the machine body. The height indicating rod is arranged to indicate the position state of the support frame, and the position state of the support frame is adjusted, so that the grinding machine can prevent the situation that one side of the machine body is overground and the other side is underground.

[0025] 2. The joint bearing is arranged, the support column can swing according to the curved surface of the machine body, and the support column can adapt to the curved surface structure of the machine body, so as to stably support the support frame above.

[0026] 3. The roller is arranged, the guide sleeve can slide conveniently, and the pressure adjusting plate is arranged on the upper side of the cover plate, the pressure adjusting plate is acted on by the spring, so as to press the support frame in the channel, preventing the whole sliding seat from shaking and improving the stability.

[0027] 4. The first spring is arranged between the first stop ring and the sliding plate, and the second spring is arranged between the second stop ring and the sliding plate, the first spring and the second spring can not only conveniently adjust the positions of the first adjusting seat and the second adjusting seat by rotating the first adjusting nut and the second adjusting nut, but also can move upwards to avoid obstacles when the grinding machine encounters obstacles. DETAILED DESCRIPTION

[0028] Figure 1 It is a perspective structural schematic view of the present application.

[0029] Figure 2 It is a front view structural schematic view of the present application.

[0030] Figure 3 It is a perspective structural schematic view of the support frame of the present application.

[0031] Figure 4 It is a perspective structural schematic view of the support column of the present application.

[0032] Figure 5 It is a perspective structural schematic view of the sliding seat of the present application.

[0033] Figure 6 It is a perspective structural schematic view of the first adjusting seat of the present application.

[0034] Figure 7 It is a perspective structural schematic view of the second adjusting seat of the present application.

[0035] Figure 8 Figure 1 is a perspective view of the first adjusting screw of the present application.

[0036] Figure 9 Figure 2 is a perspective view of the second adjusting screw of the present application.

[0037] Figure 10 Figure 3 is a perspective view of the height indicating rod of the present application.

[0038] Figure 11 Figure 4 is a longitudinal section view of the height indicating rod of the present application. Figure 10 Figure 5 is a longitudinal section view of the height indicating rod of the present application.

[0039] In the figure: support frame 10, adjusting hole 11, joint bearing 12, support column 20, suction cup 21, connecting seat 22, support screw 23, limiting nut 26, sliding seat 30, guide sleeve 31, guide groove 311, notch 312, roller 313, cover plate 314, pressure adjusting plate 315, guide rod 316, channel 317, sliding plate 32, first adjusting hole 321, second adjusting hole 322, through hole 323, handle 33, first adjusting seat 40, first half ring 41, first groove seat 42, first hinged seat 43, second adjusting seat 50, second half ring 51, second groove seat 52, second hinged seat 53, third hinged seat 54, first adjusting screw 60, U-shaped joint 61, first stop ring 62, first spring 63, first adjusting nut 64, second adjusting screw 70, hinged ring 71, second stop ring 72, second spring 73, second adjusting nut 74, grinder 80, height indicating rod 90, fixed sleeve 91, telescopic rod 92, mounting plate 911, connecting hole 913, mounting sleeve 912, flange 914, limiting ring 922, third spring 93, round smooth end 921, annular scale 923. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be further described below with reference to the accompanying drawings.

[0041] Example 1

[0042] Reference is made to Figures 1-11, the aircraft body curved surface polishing device, including support frame 10, support column 20, slide 30, grinding machine adjusting seat and height indicating rod 90, the four corners of the support frame 10 are respectively provided with support column 20, the height of support frame 10 on support column 20 is adjustable, the lower end of support column 20 is provided with suction cup 21, the slide 30 includes guide sleeve 31 and slide plate 32, two guide sleeves 31 are respectively fixedly installed at both ends of the slide plate 32, the guide sleeve 31 is slidably installed on the support frame 10, a plurality of grinding machine adjusting seats are located on the lower side of the slide plate 32, the grinding machine adjusting seats are hingedly connected with each other, and are elastically connected with the slide plate 32 through adjusting screw, the grinding machine 80 for polishing is installed on the lower side of the grinding machine adjusting seat, and the height indicating rod 90 is longitudinally installed on the slide plate 32 and located on both sides of the grinding machine adjusting seat.

[0043] The support frame 10 is used for supporting the slide 30 and enabling the slide 30 to stably slide along the support frame 10, the support column 20 is used for supporting the support frame 10 and enabling the slide 30 to be at a distance from the surface of the aircraft body, the grinding machine adjusting seat is used for mounting the grinding machine 80 and is elastically connected with the slide plate 32 through the adjusting screw, the adjusting screw can be adjusted according to the curved surface of the aircraft body, so that the lower working surface of the grinding machine 80 is adapted to the curved surface of the aircraft body, and the lower working surface of the grinding machine 80 polishes the curved surface of the aircraft body when the slide 30 is reciprocally pushed. Height indicating rods 90 are installed on both sides of the slide plate 32, the support frame 10 is adjusted through the height indicating rods 90 on both sides, so that the support frame 10 is adapted to the inclination of the surface of the aircraft body, so that the grinding machine 80 can uniformly polish the aircraft body with high precision when the slide 30 is pushed, and the situation that one side is over-polished and the other side is under-polished does not occur.

[0044] The grinding machine 80 can be an electric polisher or a pneumatic polisher.

[0045] Referring to Figure 3 The support frame 10 is a rectangular frame body, the four corners of the rectangular frame body are respectively provided with adjusting holes 11, and the support column 20 passes through the adjusting holes 11 and is respectively provided with limiting nuts 26 on the upper side and the lower side of the adjusting holes 11. The structure is simple and stable.

[0046] Referring to Figure 2 The adjusting holes 11 are provided with joint bearings 12, and the support column 20 passes through the inner holes of the joint bearings 12. Through the joint bearings 12, the support column 20 can swing according to the curved surface of the surface of the aircraft body, and the support column 20 can adapt to the curved surface structure of the surface of the aircraft body, so as to stably support the support frame 10 above.

[0047] Referring to Figure 4The support column 20 comprises a connecting seat 22 and a support screw 23, the lower end of the connecting seat 22 is connected with the suction cup 21, the support screw 23 is located at the upper end of the connecting seat 22, and a limiting nut 26 is installed on the support screw 23. In the preferred scheme, the suction cup 21 can adopt a vacuum suction cup, and can also adopt a glass suction cup structure, and the glass suction cup is preferred in the application, which is simple in structure, convenient to use and good in stability.

[0048] Referring to Figure 5 The guide sleeve 31 comprises a guide groove 311, the opening of the guide groove 311 faces downward, a plurality of notches 312 are arranged on the upper side of the guide groove 311, a roller 313 is rotatably installed in the notch 312, a cover plate 314 is installed at the opening of the lower side of the guide groove 311, a pressure adjusting plate 315 is installed on the upper side of the cover plate 314, a guide rod 316 is fixedly arranged on the lower side of the pressure adjusting plate 315, the guide rod 316 slidably penetrates through the cover plate 314, a spring is installed between the pressure adjusting plate 315 and the cover plate 314, a channel 317 is formed between the pressure adjusting plate 315 and the guide groove 311, and the guide sleeve 31 is slidably installed on the support frame 10 through the channel 317. The roller 313 is arranged to facilitate the sliding of the guide sleeve 31, and the pressure adjusting plate 315 is arranged on the upper side of the cover plate 314, the pressure adjusting plate 315 is pressed against the support frame 10 in the channel 317 by the spring, so that the sliding seat 30 is prevented from shaking as a whole, and the stability is good.

[0049] The grinding machine adjusting seat can be two, three or four.

[0050] Referring to Figure 1 , 2, 6, 7, in the preferred scheme, the grinding machine adjusting seat is three. Specifically, a plurality of said grinding machine adjusting seat includes a first adjusting seat 40 and a second adjusting seat 50 respectively installed on both sides of the first adjusting seat 40, both sides of the first adjusting seat 40 are hinged with the second adjusting seat 50, the adjusting screw rod includes a plurality of first adjusting screw rod 60 and a plurality of second adjusting screw rod 70, the first adjusting screw rod 60 is hingedly installed on the hinge point of the first adjusting seat 40 and the second adjusting seat 50, the upper end of the first adjusting screw rod 60 is threaded through the first adjusting hole 321 on the slide plate 32, the first adjusting screw rod 60 is provided with a first stop ring 62 below the slide plate 32, the first adjusting screw rod 60 is provided with a first spring 63 between the first stop ring 62 and the slide plate 32, a first adjusting nut 64 is installed on the upper side of the slide plate 32, the second adjusting screw rod 70 is hingedly installed on the side of the second adjusting seat 50 away from the first adjusting seat 40, the upper end of the second adjusting screw rod 70 is threaded through the second adjusting hole 322 on the slide plate 32, the second adjusting screw rod 70 is provided with a second stop ring 72 below the slide plate 32, the second adjusting screw rod 70 is provided with a second spring 73 between the second stop ring 72 and the slide plate 32, a second adjusting nut 74 is installed on the upper side of the slide plate 32. The height of the first adjusting seat 40 is adjusted by the first adjusting screw rod 60, and the first adjusting screw rod 60 is provided on both sides of the first adjusting seat 40, so as to adjust the inclination angle of the first adjusting seat 40, thereby adjusting the inclination angle of the grinding machine 80, and the first adjusting seat 40 is conveniently adjusted up and down by rotating the first adjusting nut 64. The angle of the second adjusting seat 50 is adjusted by the second adjusting screw rod 70, and since the second adjusting seat 50 is hinged with the first adjusting seat 40, the second adjusting seat 50 is conveniently swung by rotating the second adjusting nut 74. The first spring 63 is installed between the first stop ring 62 and the slide plate 32 of the first adjusting screw rod 60, and the second spring 73 is installed between the second stop ring 72 and the slide plate 32 of the second adjusting screw rod 70. By the support of the first spring 63 and the second spring 73, not only can the first adjusting seat 40 and the second adjusting seat 50 be conveniently adjusted by rotating the first adjusting nut 64 and the second adjusting nut 74, but also can be moved up to avoid obstacles when the grinding machine 80 encounters obstacles.

[0051] Specifically, see Figures 6-9The first adjusting seat 40 comprises two first half rings 41 and a first slot seat 42. The two first half rings 41 are connected by bolts at two ends and used for clamping the grinder 80. The first slot seat 42 has a downward slot. The two first half rings 41 are installed at the slot of the first slot seat 42. The two sides of the first slot seat 42 are respectively provided with two first hinge seats 43. The second adjusting seat 50 comprises two second half rings 51 and a second slot seat 52. The two second half rings 51 are connected by bolts at two ends and used for clamping the grinder 80. The second slot seat 52 has a downward slot. The two second half rings 51 are installed at the slot of the second slot seat 52. The side close to the first slot seat 42 of the second slot seat 52 is provided with two second hinge seats 53. The upper side of the second slot seat 52 is provided with two third hinge seats 54. The first hinge seat 43 is hinged with the second hinge seat 53. The lower end of the first adjusting screw 60 is provided with a U-shaped joint 61. The U-shaped joint 61 is hinged with the first hinge seat 43 and the second hinge seat 53. The lower end of the second adjusting screw 70 is provided with a hinge ring 71. The hinge ring 71 is hinged with the third hinge seat 54.

[0052] Referring to Figure 5 The slide seat 30 is further provided with a handle 33. The two ends of the handle 33 are respectively installed on the guide sleeve 31. The handle 33 facilitates the pushing of the slide seat 30.

[0053] Referring to Figure 10 、 11 The height indicating rod 90 comprises a fixed sleeve 91 and a telescopic rod 92. The fixed sleeve 91 comprises an installation plate 911 provided with a connecting hole 913. The lower side of the installation plate 911 is fixedly connected with an installation sleeve 912. The bottom of the installation sleeve 912 is provided with an inward flange 914. The telescopic rod 92 is slidably installed in the fixed sleeve 91. The telescopic rod 92 is provided with a limiting ring 922 in the fixed sleeve 91. The telescopic rod 92 is provided with a third spring 93 between the limiting ring 922 and the installation plate 911. The lower end of the telescopic rod 92 has a smooth end 921. The upper end of the telescopic rod 92 is provided with an annular scale 923. The fixed sleeve 91 is installed on the lower side of the slide plate 32 through the connecting hole 913. The upper end of the telescopic rod 92 penetrates through the through hole 323 on the slide plate 32. The height indicating rod 90 is slid on the surface of the aircraft body by pushing the slide seat 30. In the sliding process, the telescopic rod 92 moves up and down. When the position of the annular scale 923 at the upper end of the telescopic rod 92 changes greatly, it proves that the support frame 10 is not parallel or corresponding to the surface of the aircraft body. Therefore, the position of the support frame 10 needs to be adjusted. The position state of the support frame 10 is indicated by the height indicating rod 90. The position state of the support frame 10 is adjusted. Thus, the situation that one side of the aircraft body is over polished and the other side is under polished by the grinder 80 can be prevented.

[0054] Embodiment two:

[0055] Referring to Figure 1 、 2 A method for polishing with an aircraft body curved surface polishing device, comprising the following steps,

[0056] S1. Mark and number the defects on the surface of the aircraft body;

[0057] S2. Carry the polishing device to the position of the aircraft body that needs to be repaired, fix the support column 20 through the suction cup 21, and make the sliding direction of the sliding seat 30 consistent with the length direction of the aircraft body;

[0058] S3. Adjust the position of the support frame 10 through the limiting nut 26, so that the grinding machine 80 does not contact the surface of the aircraft body, and the telescopic rod 92 of the height indicating rod 90 contacts the surface of the aircraft body;

[0059] S4. Push and pull the sliding seat 30, and observe the annular scale 923 on the telescopic rod 92. If the annular scale 923 fluctuates greatly up and down, adjust the height of the support frame 10 through the limiting nut 26, until the difference between the up and down values of the annular scale 923 is within 0.5mm;

[0060] S5. Adjust the first adjusting nut 64, so that the grinding machine 80 at the lower end of the first adjusting seat 40 contacts the aircraft body, and then adjust the second adjusting nut 74, so that the grinding machine 80 at the lower end of the second adjusting seat 50 contacts the aircraft body, so that the lower end working surface of each grinding machine 80 adapts to the curved surface of the aircraft body;

[0061] S6. Start the grinding machine 80, push the sliding seat 30, and observe the polishing condition of the surface of the aircraft body. According to the polishing condition, further adjust the first adjusting nut 64 and the second adjusting nut 74, until the polishing exposes the fan skin.

Claims

1. An aircraft fuselage curved surface polishing device, characterized in that: The utility model provides a grinding machine height adjustable frame, including support frame (10), support column (20), slide (30), grinding machine adjusting seat and height indicating rod (90), four corner parts of support frame (10) are installed with support column (20) respectively, the height of support frame (10) is adjustable on support column (20), the lower end of support column (20) is installed with sucking disc (21), the slide (30) includes guide sleeve (31) and slide plate (32), two guide sleeve (31) are fixedly installed at both ends of slide plate (32) respectively, guide sleeve (31) is slidably installed on support frame (10), a plurality of grinding machine adjusting seat are located on the downside of slide plate (32), grinding machine adjusting seat is hingedly connected between each other, and the elastic connection of grinding machine adjusting seat with slide plate (32) is adjustable through adjusting screw, and the grinding machine (80) for polishing machine body is installed on the downside of grinding machine adjusting seat, height indicating rod (90) is longitudinally installed on slide plate (32) and is located on the both sides of sand wheel adjusting seat, The guide sleeve (31) includes guide groove (311), the opening of guide groove (311) faces downward, a plurality of notches (312) are arranged on the upper side of guide groove (311), the roller (313) is rotatably arranged in the notch (312), the cover plate (314) is arranged on the lower side opening of guide groove (311), the pressure adjusting plate (315) is arranged on the upper side of cover plate (314), the guide rod (316) is fixedly arranged on the lower side of pressure adjusting plate (315), the guide rod (316) is slidably arranged through cover plate (314), the spring is arranged between pressure adjusting plate (315) and cover plate (314) of guide rod (316), the channel (317) is formed between pressure adjusting plate (315) and guide groove (311), the guide sleeve (31) is slidably arranged on support frame (10) through channel (317).

2. The aircraft fuselage curving sander of Claim 1, wherein: The support frame (10) is a rectangular frame body, the four corner parts of the rectangular frame body are respectively provided with adjusting holes (11), the support column (20) passes through the adjusting hole (11) and is respectively provided with limiting nuts (26) on the upper side and the lower side of the adjusting hole (11).

3. The aircraft fuselage curving sander of Claim 2, wherein: The adjusting hole (11) is provided with the knuckle bearing (12), and the support column (20) passes through the inner hole of the knuckle bearing (12).

4. An aircraft fuselage fairing device as claimed in claim 2 or 3, characterised in that: The support column (20) includes a connecting seat (22) and a support screw (23), the lower end of the connecting seat (22) is connected with the sucking disc (21), the support screw (23) is located at the upper end of the connecting seat (22), and the limiting nut (26) is arranged on the support screw (23).

5. The aircraft fuselage curving sander of Claim 2, wherein: The plurality of grinding machine adjusting seats comprises a first adjusting seat (40) and a second adjusting seat (50) respectively installed on both sides of the first adjusting seat (40), both sides of the first adjusting seat (40) are hinged with the second adjusting seat (50), the adjusting screw rod comprises a plurality of first adjusting screw rods (60) and a plurality of second adjusting screw rods (70), the first adjusting screw rod (60) is hingedly installed at the hinge point of the first adjusting seat (40) and the second adjusting seat (50), the upper end of the first adjusting screw rod (60) passes through the first adjusting hole (321) on the sliding plate (32), the first adjusting screw rod (60) is provided with a first stop ring (62) below the sliding plate (32), the first adjusting screw rod (60) is provided with a first spring (63) between the first stop ring (62) and the sliding plate (32), a first adjusting nut (64) is installed on the upper side of the sliding plate (32), the second adjusting screw rod (70) is hingedly installed on the side of the second adjusting seat (50) away from the first adjusting seat (40), the upper end of the second adjusting screw rod (70) passes through the second adjusting hole (322) on the sliding plate (32), the second adjusting screw rod (70) is provided with a second stop ring (72) below the sliding plate (32), the second adjusting screw rod (70) is provided with a second spring (73) between the second stop ring (72) and the sliding plate (32), a second adjusting nut (74) is installed on the upper side of the sliding plate (32).

6. An aircraft fuselage fairing polishing apparatus as defined in claim 5, wherein: The first adjusting seat (40) comprises two first half rings (41) and a first slot seat (42), both ends of the two first half rings (41) are connected by bolts, used for clamping the grinding machine (80), the slot of the first slot seat (42) is downward, the two first half rings (41) are installed at the slot of the first slot seat (42), both sides of the first slot seat (42) are respectively provided with two first hinge seats (43), the second adjusting seat (50) comprises two second half rings (51) and a second slot seat (52), both ends of the two second half rings (51) are connected by bolts, used for clamping the grinding machine (80), the slot of the second slot seat (52) is downward, the two second half rings (51) are installed at the slot of the second slot seat (52), the side of the second slot seat (52) close to the first slot seat (42) is provided with two second hinge seats (53), the upper side of the second slot seat (52) is provided with two third hinge seats (54), the first hinge seat (43) is hinged with the second hinge seat (53), the lower end of the first adjusting screw rod (60) is provided with a U-shaped joint (61), the U-shaped joint (61) is hinged with the first hinge seat (43) and the second hinge seat (53), the lower end of the second adjusting screw rod (70) is provided with a hinge ring (71), the hinge ring (71) is hinged with the third hinge seat (54).

7. The aircraft fuselage curving sander of Claim 1, wherein: The sliding seat (30) is further provided with a handle (33), both ends of the handle (33) are respectively installed on the guide sleeve (31).

8. The aircraft fuselage curving sander of Claim 5, wherein: The height indicating rod (90) comprises a fixed sleeve (91) and a telescopic rod (92), the fixed sleeve (91) comprises a mounting plate (911) provided with a connecting hole (913), the lower side of the mounting plate (911) is fixedly connected with a mounting sleeve (912), the bottom of the mounting sleeve (912) is provided with an inward flange (914), the telescopic rod (92) is slidably mounted in the fixed sleeve (91), the telescopic rod (92) is provided with a limiting ring (922) in the fixed sleeve (91), the telescopic rod (92) is provided with a third spring (93) between the limiting ring (922) and the mounting plate (911), the lower end of the telescopic rod (92) has a smooth end (921), the upper end of the telescopic rod (92) is provided with an annular scale (923), the fixed sleeve (91) is mounted on the lower side of the sliding plate (32) through the connecting hole (913), and the upper end of the telescopic rod (92) penetrates through the through hole (323) on the sliding plate (32).

9. A method of polishing with the aircraft fuselage curve polishing device of claim 8, characterized in that, The method comprises the following steps, S1. Mark and number the surface defects of the aircraft body; S2. Carry the polishing device to the position of the aircraft body needing repair, fix the supporting column (20) through the suction cup (21), and make the sliding direction of the sliding seat (30) consistent with the length direction of the aircraft body; S3. Adjust the position of the supporting frame (10) through the limiting nut (26), so that the grinding machine (80) is not in contact with the surface of the body, and the telescopic rod (92) of the height indicating rod (90) is in contact with the surface of the body; S4. Push and pull the sliding seat (30), and observe the annular scale (923) on the telescopic rod (92), if the annular scale (923) fluctuates greatly up and down, adjust the height of the supporting frame (10) through the limiting nut (26), until the difference between the up and down values of the annular scale (923) is within 0.5mm; S5. Adjust the first adjusting nut (64), so that the grinding machine (80) at the lower end of the first adjusting seat (40) is in contact with the aircraft body, and then adjust the second adjusting nut (74), so that the grinding machine (80) at the lower end of the second adjusting seat (50) is in contact with the aircraft body, so that the lower end working surface of each grinding machine (80) is adapted to the curved surface of the aircraft body; S6. Start the grinding machine (80), push the sliding seat (30), and observe the polishing condition of the surface of the body, further adjust the first adjusting nut (64) and the second adjusting nut (74) according to the polishing condition, until the polishing exposes the fan skin.

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