Flexible positioning device for processing aircraft DOS support

Abstract

This invention discloses a flexible positioning device for machining aircraft DOS supports, relating to the field of precision machining of aerospace components. It includes a tooling base and an elastic positioning rod. Multiple detachable blocks for mounting the elastic positioning rod are detachably installed on the tooling base, and a limiting mechanism is provided between the tooling base and the detachable blocks. A reinforcement mechanism is also provided at the detachable blocks. This invention, through a matching integrated cleaning mechanism combining circumferential sweeping and air jetting, can blow and brush away metal debris adhering to the outer wall of the elastic positioning rod during machining gaps, reducing the probability of debris getting stuck in the rod's mating gaps, alleviating rod jamming and positioning misalignment problems, and helping to maintain the tooling positioning accuracy over the long term. Simultaneously, during cleaning operations, the pressure rollers on the pusher frame can continuously limit and press the frame, with the locking state and cleaning action linked and coordinated. The cleaning and locking processes do not interfere with each other, the stroke of each component is reasonable, and the occurrence of component collisions and interference during operation is not likely.

Description

Technical Field

[0001] This invention relates to the field of precision machining of aerospace components, specifically a flexible positioning device for machining aircraft DOS supports. Background Technology

[0002] The DOS support (casing end) is a key irregular structural component of the aircraft power system. The raw material is 7050-T7451 aviation aluminum alloy. The machining process includes multiple CNC cutting processes such as reference milling, roughing and finishing, boring, chamfering, and segmented cutting. The product's dimensional accuracy and geometric tolerances are strictly controlled. The positioning accuracy of the machining and clamping directly determines the finished product qualification rate and machining stability. Flexible positioning fixtures, with their advantages of self-adaptation and self-centering and adaptability to various specifications of irregular workpieces, are gradually replacing traditional dedicated rigid fixtures and are widely used in the batch CNC machining of aircraft DOS supports.

[0003] The existing flexible positioning device for machining aircraft DOS supports mainly consists of a tooling base, a drive cylinder, multiple sets of elastic positioning rods, and locking and limiting components. The equipment relies on the cylinder to drive the positioning components on both sides to achieve self-centering clamping of the workpiece. After the workpiece is placed in the middle of the tooling, the cylinder pushes the positioning structure to fit the outer contour of the workpiece, and the fasteners lock the flexible structure into a rigid positioning state. After machining is completed, the fasteners are loosened, and the tooling can return to its self-adaptive flexible state. It can be compatible with left and right DOS support clamping of different shapes and sizes in the same series, without the need to frequently change the entire set of tooling, effectively reducing the manufacturing cost of non-standard fixtures. It is the mainstream clamping solution for current aerospace irregular small parts.

[0004] However, during the continuous machining process of DOS support cutting and grinding, the cutting tool generates a large amount of fine alloy slag and metal dust. The slag is very easy to fall and get stuck inside the expansion and contraction gap of the elastic rod, accumulating and adhering to the outer wall of the elastic rod and the sliding cavity for a long time. The slag will increase the frictional resistance of the expansion and contraction movement of the elastic rod. At best, it will cause expansion and contraction to be stuck, and return to the original position incompletely, resulting in workpiece centering deviation and decreased clamping and positioning accuracy. At worst, it will directly jam the elastic rod, and the tooling will lose its self-centering and flexible clamping functions, forcing the machine to stop for disassembly and cleaning, which will greatly interrupt the continuous machining rhythm of DOS support and increase equipment maintenance time and production costs. Summary of the Invention

[0005] The purpose of this invention is to provide a flexible positioning device for machining aircraft DOS bearings, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flexible positioning device for processing aircraft DOS support, comprising a tooling base and an elastic positioning rod, wherein a plurality of easy-to-remove blocks for installing the elastic positioning rod are detachably installed on the tooling base, and a limit mechanism is provided between the tooling base and the easy-to-remove blocks, and a reinforcement mechanism is provided at the easy-to-remove blocks. A cleaning mechanism corresponding to the elastic positioning rod is provided on the outer wall of the tooling base. The cleaning mechanism includes a cleaning plate slidably mounted on the outer wall of the tooling base, a propulsion frame and an electric push rod slidably mounted on the side wall of the tooling base. The propulsion frame is connected to the electric push rod and the cleaning plate, and a plurality of through holes and nozzles adapted to the elastic positioning rod are provided on the cleaning plate. The nozzles are interconnected with each other, and the nozzles face the outer wall of the elastic positioning rod. A trachea slidably mounted on the tooling base and connected to the cleaning plate and an external blower is provided, and the trachea is connected to the nozzles in the cleaning plate; The cleaning mechanism further includes a rotating ring rotatably mounted in the cleaning plate and a cleaning brush mounted on the outer wall of the rotating ring, and the cleaning brush contacts the outer wall of the elastic positioning rod. A driver for driving the rotating ring is provided in the cleaning plate.

[0007] Preferably, the limiting mechanism includes a bottom connecting block mounted at the bottom of the detachable block and a bottom connecting groove provided on the inner wall of the bottom of the tooling base. The length of the bottom connecting block is less than the length of the detachable block, and chamfering treatments are performed on the bottom end corners of the bottom connecting block and the top opening corners of the bottom connecting groove.

[0008] Preferably, the outer walls of the plurality of detachable blocks do not abut against each other, and the reinforcement mechanism provided on the outer wall of the detachable block includes side pushing frames slidably mounted on the outer walls on both sides of the detachable block and propulsion pistons slidably mounted in the detachable block. Installation grooves for the side pushing frames and the propulsion pistons to slide are provided on the outer wall of the detachable block.

[0009] Preferably, the reinforcement mechanism further includes an oil box and an oil delivery pipe mounted on the detachable block. One end of the oil delivery pipe is connected to the oil box, and the other end is connected to the installation groove. A downward moving piston, a pressing plate and a spring are slidably mounted on the oil box. The downward moving piston and the pressing plate are respectively located inside and above the oil box. The pressing plate is connected to the spring, and a handle is mounted on the top of the pressing plate.

[0010] Preferably, side pressing ears are mounted on the side wall of the pressing plate. A pressing frame for pressing down the side pressing ears is rotatably mounted at one end of the top of the tooling base, and a magnet magnetically attracting the pressing frame is mounted at the other end.

[0011] Preferably, the side pressing ears are symmetrically mounted on both sides of the pressing plate. The cross section of the pressing frame is designed in a "C" shape for pressing down the tops of all the side pressing ears, and the outer end top of the pressing frame contacts a pressing wheel rotatably mounted on the top of the propulsion frame.

[0012] Preferably, a plurality of the pressing wheels are equidistantly provided on the top of the propulsion frame, and the distance between the plurality of pressing wheels is greater than the length of the elastic positioning rod protruding from the tooling base, so as to ensure that when the cleaning mechanism cleans the elastic positioning rod, the pressing wheels continuously restrict the end of the pressing frame.

[0013] Preferably, the outer end face of the cleaning plate is designed with an angle, and the diameter of the multiple through holes opened on the cleaning plate is larger than the outer diameter of the elastic positioning rod, and the outer openings of the through holes are all designed to open outward.

[0014] Preferably, multiple cleaning brushes are installed at equal angles on the outer wall of the rotating ring, and the length of the cleaning brush is greater than the distance between the outer wall of the rotating ring and the outer wall of the elastic positioning rod.

[0015] Preferably, the driver includes a synchronizing sprocket rotatably mounted inside the cleaning plate and connected to a rotating ring, a driving sprocket rotatably mounted inside the side wall of the cleaning plate, and a chain for connecting the plurality of synchronizing sprockets to the driving sprocket. A motor connected to the driving sprocket is mounted on the outer wall of the cleaning plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the matching integrated cleaning mechanism combining circumferential sweeping and air jetting, can blow and brush away metal debris attached to the outer wall of the elastic positioning rod during the processing gap, reducing the probability of debris getting stuck in the gap between the rod parts, alleviating the problems of rod jamming and positioning offset, and helping to maintain the positioning accuracy of the tooling in the long term. At the same time, during the cleaning operation, the pressure roller on the push frame can continuously limit the pressure frame, and the locking state and the cleaning action are linked and coordinated. The cleaning and locking processes do not interfere with each other, the movement stroke of each component is reasonable, and the collision and interference of components are not likely to occur during operation. 2. This invention adopts a hydraulic side-top locking structure with a pressure frame linkage. Pressing down the pressure frame can simultaneously drive multiple sets of side pushers to abut the disassembly block from the side, improving the stability of the disassembly and assembly and reducing the probability of component loosening caused by processing vibration. When unlocking, it relies on spring rebound or handle to assist in pressure relief, making disassembly and assembly convenient and facilitating the replacement of positioning components with different layouts as needed. At the same time, the disassembly block adopts a plug-in positioning structure with bottom connecting block and bottom connecting groove, coupled with a chamfered guide design, which reduces the difficulty of assembly alignment. When necessary, the disassembly and positioning rods can be flexibly added, removed, or replaced according to different specifications of DOS support, and the cleaning plate can be replaced to improve the flexibility and adaptability of the tooling. 3. In this invention, the cleaning plate is provided with an flared through hole, which allows the debris that is swept off to flow outward along the hole wall, reducing the situation where waste falls back into the gap of the rod, further optimizing the cleaning effect and extending the continuous service life of the elastic positioning rod. 4. This invention integrates flexible workpiece clamping, online slag removal, and modular disassembly and locking into one unit, reducing the frequency of tooling downtime for disassembly, inspection, and cleaning. This is beneficial for improving the continuity of batch CNC machining of aircraft DOS supports and reducing daily equipment maintenance time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2This is a schematic diagram of the structure of the present invention after the cleaning mechanism has been removed; Figure 3 This is a schematic diagram of the structure of the tooling base and the easy-to-disassemble block when separated according to the present invention; Figure 4 This is a schematic diagram of the structure of the disassembly block of the present invention; Figure 5 This is a schematic diagram of the structure of the components on the disassembly block of the present invention after disassembly; Figure 6 This is a schematic diagram of the cleaning mechanism of the present invention; Figure 7 This is a schematic diagram of the cleaning mechanism of the present invention from another perspective; Figure 8 This is a schematic diagram of the structure of the driver of the present invention.

[0018] In the diagram: 1. Tooling base; 2. Easy-to-disassemble block; 3. Elastic positioning rod; 4. Bottom connecting block; 41. Bottom connecting groove; 5. Side push frame; 6. Push piston; 61. Mounting groove; 62. Oil supply pipe; 63. Oil box; 64. Lowering piston; 65. Pressure plate; 66. Handle; 67. Spring; 7. Side pressure ear; 71. Pressure frame; 72. Magnet; 73. Pressure roller; 8. Cleaning plate; 81. Through hole; 82. Push frame; 83. Electric push rod; 9. Nozzle; 10. Air pipe; 11. Rotary ring; 12. Cleaning brush; 13. Synchronous sprocket; 14. Drive sprocket; 15. Chain; 16. Motor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8, the present invention provides a technical solution: a flexible positioning device for machining the DOS support of an aircraft, including a tooling base 1 and elastic positioning rods 3. A plurality of detachable blocks 2 for installing the elastic positioning rods 3 are detachably installed on the tooling base 1, and a limiting mechanism is provided between the tooling base 1 and the detachable blocks 2, and a reinforcement mechanism is provided at the detachable blocks 2; a cleaning mechanism corresponding to the elastic positioning rods 3 is provided on the outer wall of the tooling base 1. The cleaning mechanism includes a cleaning plate 8 slidably installed on the outer wall of the tooling base 1, and a propulsion frame 82 and an electric push rod 83 slidably installed on the side wall of the tooling base 1. The propulsion frame 82, the electric push rod 83 and the cleaning plate 8 are detachably connected by bolts, and a plurality of through holes 81 and nozzles 9 adapted to the elastic positioning rods 3 are formed on the cleaning plate 8. The nozzles 9 are interconnected, and the nozzles 9 face the outer wall of the elastic positioning rods 3. An air pipe 10 connected to the cleaning plate 8 and an external blower is slidably installed on the tooling base 1, and the air pipe 10 is connected to the nozzles 9 in the cleaning plate 8; the cleaning mechanism further includes a rotating ring 11 rotatably installed in the cleaning plate 8 and a cleaning brush 12 installed on the outer wall of the rotating ring 11, and the cleaning brush 12 contacts the outer wall of the elastic positioning rods 3. A driver for driving the rotating ring 11 is provided in the cleaning plate 8.

[0021] As an embodiment of the present invention, the limiting mechanism includes a bottom connecting block 4 installed at the bottom of the detachable block 2 and a bottom connecting groove 41 opened on the inner wall of the bottom of the tooling base 1. The length of the bottom connecting block 4 is less than the length of the detachable block 2, and the bottom end corners of the bottom connecting block 4 and the top opening corners of the bottom connecting groove 41 are chamfered; the chamfered structure facilitates the alignment and insertion of the bottom connecting block 4 into the bottom connecting groove 41, realizing the quick pre-installation positioning of the detachable block 2, and the assembly alignment efficiency is higher.

[0022] As an embodiment of the present invention, the reinforcement mechanism includes a side pushing frame 5 slidably installed on the outer walls of both sides of the detachable block 2 and a propulsion piston 6 slidably installed in the detachable block 2, and an installation groove 61 for the side pushing frame 5 and the propulsion piston 6 to slide is opened on the outer wall of the detachable block 2; The reinforcement mechanism further includes an oil box 63 installed on the detachable block 2 and an oil delivery pipe 62. One end of the oil delivery pipe 62 is connected to the oil box 63, and the other end is connected to the installation groove 61. A downward moving piston 64, a pressing plate 65 and a spring 67 are slidably installed on the oil box 63. The downward moving piston 64 and the pressing plate 65 are respectively located inside and above the oil box 63. The pressing plate 65 is connected to the spring 67, and a handle 66 is installed on the top of the pressing plate 65; A side pressing ear 7 is installed on the side wall of the pressing plate 65. One end of the top of the tooling base 1 is rotatably installed with a pressing frame 71 for pressing down the side pressing ear 7, and the other end is installed with a magnet 72 magnetically attracting the pressing frame 71; the cross section of the pressing frame 71 is designed in a "C" shape for pressing down all the side pressing ears 7, and the outer end top of the pressing frame 71 contacts a pressing wheel 73 rotatably installed on the top of the propulsion frame 82; a plurality of pressing wheels 73 are equally spaced on the top of the propulsion frame 82, and the distance between the plurality of pressing wheels 73 is greater than the length of the elastic positioning rod 3 protruding from the tooling base 1; The pressure frame 71 presses down on the side pressure ear 7, and the side push frame 5 is driven by hydraulic transmission to extend and press against the adjacent easy-to-remove block 2. Multiple blocks are mutually limited and fixed. During cleaning operations, the pressure roller 73 presses the pressure frame 71 to prevent vibration and disengagement. The spring 67 and the handle 66 can realize the manual reset of the hydraulic structure.

[0023] In one embodiment of the present invention, the outer end face of the cleaning plate 8 is designed with a bevel, and the diameter of the multiple through holes 81 opened on the cleaning plate 8 is larger than the outer diameter of the elastic positioning rod 3, and the outer openings of the through holes 81 are all designed to open outward; multiple cleaning brushes 12 are installed at equal angles on the outer wall of the rotating ring 11, and the length of the cleaning brushes 12 is greater than the distance between the outer wall of the rotating ring 11 and the outer wall of the elastic positioning rod 3; the flared through holes 81 facilitate the outward sliding of waste residue, preventing debris from falling back and getting stuck in the gap between the rods, and when the cleaning brushes 12 rotate, they completely wrap around the elastic positioning rod 3, cleaning without dead corners.

[0024] In one embodiment of the present invention, the driver includes a synchronous sprocket 13 rotatably mounted inside the cleaning plate 8 and connected to the rotating ring 11, a drive sprocket 14 rotatably mounted inside the side wall of the cleaning plate 8, and a chain 15 for connecting multiple synchronous sprockets 13 to the drive sprocket 14. A motor 16 connected to the drive sprocket 14 is mounted on the outer wall of the cleaning plate 8. A single motor 16 drives all rotating rings 11 to rotate synchronously through the sprocket and chain linkage, resulting in good synchronization and a simple and stable structure.

[0025] Working principle: Before the assembly operation begins, the flexible positioning device for DOS support processing of this aircraft first activates the electric push rod 83, which drives the push frame 82 and the cleaning plate 8 to move to the extreme position away from the tooling base 1, making room for assembly and facilitating the smooth installation of the disassembly block 2 and the elastic positioning rod 3 onto the tooling base 1. When assembling the disassembly block 2, first align the disassembly block 2 with the bottom connecting block 4 and the bottom connecting groove 41 of the tooling base 1 to complete the positioning assembly. The chamfered structure of the bottom connecting block 4 and the bottom connecting groove 41 facilitates quick alignment and insertion. After all the disassembly blocks 2 are in place, flip the pressure frame 71 so that the pressure frame 71 squeezes all the side pressure ears 7 one by one during the rotation. This causes the side pressure ears 7 to drive the pressure plate 65 to compress the spring 67 downward and push the piston 64 downward at the same time. This allows the hydraulic oil inside the oil box 63 to be sent into the mounting groove 61 through the oil supply pipe 62. The hydraulic pressure pushes the push piston 6 and the side push frame 5, causing the side push frame 5 to extend from both sides of the disassembly block 2. This causes the side push frames 5 of adjacent disassembly blocks 2 to abut against each other and limit the position, improving the assembly firmness of the disassembly block 2. This continues until the end of the pressure frame 71 is magnetically attached to the magnet 72, completing the overall locking and fixing. After locking is completed, start the electric push rod 83 again to pull the push frame 82 and the cleaning plate 8 towards the tooling base 1 until the cleaning plate 8 is in contact with the outer wall of the tooling base 1. During this stage, the pressure roller 73 above the push frame 82 will move to the top surface of the pressure frame 71 and continue to press and limit to prevent the pressure frame 71 from being accidentally lifted during the processing. It should be noted that the start and stop frequency of the electric push rod 83 can be set as needed. It can be used for centralized cleaning before the start of a batch of workpieces or after the completion of the entire batch of processing, or it can be used for immediate cleaning after each single piece is clamped. In addition, except when disassembling the disassembly block 2, the electric push rod 83 will extend to its limit to allow the pressure roller 73 to disengage from the pressure frame 71. Under other normal cleaning conditions, the extension and retraction stroke of the electric push rod 83 is less than the distance between each pressure roller 73. During the regular cleaning phase, while the electric push rod 83 drives the cleaning plate 8 to move back and forth, the motor 16 and the external fan start synchronously. The external fan supplies air to the cleaning plate 8 through the air pipe 10, and the air is sprayed onto the outer wall of the elastic positioning rod 3 through the interconnected nozzles 9. The motor 16 drives all the rotating rings 11 to rotate synchronously by the drive sprocket 14, chain 15, and synchronous sprocket 13, so that multiple sets of cleaning brushes 12 on the outer side of the rotating rings 11 wipe the elastic positioning rod 3 around the periphery to remove debris. The metal debris that is swept off can be guided through the through hole 81 on the cleaning plate 8 to prevent the debris from falling back into the gaps between the rods. After a single cleaning process is completed, the electric push rod 83 drives the cleaning plate 8 back to its original position where it is in contact with the tooling base 1. During the cleaning process, the pressure roller 73 always remains in a state of pressing against the pressure frame 71, and the locking structure continues to be effective. After cleaning is completed, the aircraft DOS support can be placed between each set of elastic positioning rods 3. The elastic positioning rods 3 are used to achieve flexible adaptive centering and carry out CNC machining operations such as milling and boring. To disassemble and replace the easy-release block 2, manually extend the electric actuator 83 to its limit position to separate the pressure roller 73 from the pressure frame 71, thus releasing the pressure constraint on the pressure frame 71. Then, lift the pressure frame 71, the pressure plate 65 loses its downward load, the spring 67 rebounds and drives the downward piston 64 to reset, the hydraulic oil flows back into the oil box 63, and the side pusher 5 and the push piston 6 retract under the action of hydraulic pressure, thus releasing the lateral restraint of the easy-release block 2. Even if the spring 67 fails due to fatigue and cannot rebound automatically, the operator can directly pull the handle 66 to manually lift the pressure plate 65 to complete the reset, and then pull the target easy-release block 2 out of the tooling base 1 for replacement by pulling the handle 66.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A flexible positioning device for machining aircraft DOS bearings, comprising a tooling base (1) and an elastic positioning rod (3), characterized in that: A plurality of detachable blocks (2) for installing elastic positioning rods (3) are detachably installed on the tooling base (1), and a limiting mechanism is provided between the tooling base (1) and the detachable blocks (2), and a reinforcement mechanism is provided at the detachable blocks (2); A cleaning mechanism corresponding to the elastic positioning rod (3) is provided on the outer wall of the tooling base (1). The cleaning mechanism includes a cleaning plate (8) slidably installed on the outer wall of the tooling base (1), a propulsion frame (82) and an electric push rod (83) slidably installed on the side wall of the tooling base (1). The propulsion frame (82) is connected to the electric push rod (83) and the cleaning plate (8), and a plurality of through holes (81) and nozzles (9) adapted to the elastic positioning rod (3) are provided on the cleaning plate (8). The nozzles (9) are interconnected, and the nozzles (9) face the outer wall of the elastic positioning rod (3). A trachea (10) slidably installed on the tooling base (1) and connected to the cleaning plate (8) and an external blower is provided, and the trachea (10) is connected to the nozzles (9) in the cleaning plate (8); The cleaning mechanism further includes a rotating ring (11) rotatably installed in the cleaning plate (8) and a cleaning brush (12) installed on the outer wall of the rotating ring (11), and the cleaning brush (12) contacts the outer wall of the elastic positioning rod (3). A driver for driving the rotating ring (11) is provided in the cleaning plate (8).

2. The flexible positioning device for processing aircraft DOS bearings according to claim 1, characterized in that: The limiting mechanism includes a bottom connecting block (4) installed at the bottom of the detachable block (2) and a bottom connecting groove (41) opened on the inner wall of the bottom of the tooling base (1). The length of the bottom connecting block (4) is less than the length of the detachable block (2), and chamfering treatments are performed on the bottom end corners of the bottom connecting block (4) and the top opening corners of the bottom connecting groove (41).

3. The flexible positioning device for processing aircraft DOS bearings according to claim 1, characterized in that: The outer walls of the plurality of detachable blocks (2) do not adhere to each other, and the reinforcement mechanism provided on the outer wall of the detachable block (2) includes side pushing frames (5) slidably installed on the outer walls on both sides of the detachable block (2) and a propulsion piston (6) slidably installed in the detachable block (2). Installation grooves (61) for the side pushing frames (5) and the propulsion piston (6) to slide are opened on the outer wall of the detachable block (2).

4. The flexible positioning device for processing aircraft DOS bearings according to claim 3, characterized in that: The reinforcement mechanism further includes an oil box (63) and an oil delivery pipe (62) installed on the detachable block (2). One end of the oil delivery pipe (62) is connected to the oil box (63), and the other end is connected to the installation groove (61). A downward moving piston (64), a pressing plate (65) and a spring (67) are slidably installed on the oil box (63). The downward moving piston (64) and the pressing plate (65) are respectively located inside and above the oil box (63). The pressing plate (65) is connected to the spring (67), and a handle (66) is installed on the top of the pressing plate (65).

5. The flexible positioning device for processing aircraft DOS bearings according to claim 4, characterized in that: A side pressing ear (7) is installed on the side wall of the pressing plate (65). A pressing frame (71) for pressing down the side pressing ear (7) is rotatably installed at one end of the top of the tooling base (1), and a magnet (72) magnetically attracting the pressing frame (71) is installed at the other end.

6. The flexible positioning device for processing aircraft DOS bearings according to claim 5, characterized in that: The side pressing ears (7) are symmetrically installed on both sides of the pressing plate (65). The cross section of the pressing frame (71) is designed in a "C" shape for pressing down the tops of all the side pressing ears (7), and the outer end top of the pressing frame (71) contacts a pressing wheel (73) rotatably installed on the top of the propulsion frame (82).

7. A flexible positioning device for machining aircraft DOS supports according to claim 6, characterized in that: Multiple pressure rollers (73) are provided at equal intervals on the top of the push frame (82). The distance between the multiple pressure rollers (73) is greater than the length of the elastic positioning rod (3) protruding from the tooling base (1). This is to ensure that when the cleaning mechanism cleans the elastic positioning rod (3), the pressure rollers (73) continuously restrict the end of the pressure frame (71).

8. The flexible positioning device for processing aircraft DOS bearings according to claim 1, characterized in that: The outer end face of the cleaning plate (8) is designed with a bevel, and the diameter of the multiple through holes (81) opened on the cleaning plate (8) is larger than the outer diameter of the elastic positioning rod (3), and the openings on the outer side of the through holes (81) are designed to open outward.

9. A flexible positioning device for machining aircraft DOS supports according to claim 1, characterized in that: Multiple cleaning brushes (12) are installed at equal angles on the outer wall of the rotating ring (11), and the length of the cleaning brushes (12) is greater than the distance between the outer wall of the rotating ring (11) and the outer wall of the elastic positioning rod (3).

10. A flexible positioning device for machining aircraft DOS supports according to claim 1, characterized in that: The drive includes a synchronizing sprocket (13) rotatably mounted inside the cleaning plate (8) and connected to a sprocket (11), and a drive sprocket (14) rotatably mounted inside the side wall of the cleaning plate (8), and a chain (15) for connecting the plurality of synchronizing sprockets (13) to the drive sprocket (14). A motor (16) connected to the drive sprocket (14) is mounted on the outer wall of the cleaning plate (8).

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