A deformation control device and control method for machining aircraft thin-walled parts

Abstract

The present invention discloses a deformation control device and a control method for machining aircraft thin-walled parts. The deformation control device includes a vacuum adsorption table, a lifting mechanism, a sliding assembly, a contact portion, and a spacing adjustment mechanism; the lifting mechanism is arranged above the vacuum adsorption table, and its output end is connected with a mounting frame; the sliding assembly includes a slide rail and a slider slidably connected to the slide rail. The slide rail is arranged along the width direction of the vacuum adsorption table, and one end of the slide rail is fixed to the side wall of the mounting frame; the contact portion includes a first contact plate and a second contact plate. A drilling guide hole is penetrated through the side wall of the first contact plate, and a discharge hole is penetrated through the side wall of the second contact plate; the spacing adjustment mechanism is arranged between the second contact plate and the mounting frame. By setting the cooperation of the spacing adjustment mechanism and the lifting mechanism, the positions of the first contact plate and the second contact plate can be adjusted, so that the side walls of the C-shaped beam are contacted and positioned by the first contact plate and the second contact plate, avoiding deformation caused by the impact of the drill bit during drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft part processing, and specifically to a deformation control device and control method for processing aircraft thin-walled parts. Background Art

[0002] Aircraft thin-walled parts refer to those with a relatively small wall thickness and a relatively large outer diameter, and are used in various components of an aircraft. Due to their light weight, high strength, and good machinability, thin-walled parts play an important role in aircraft manufacturing.

[0003] As a kind of thin-walled beam, the C-shaped beam mainly serves as a skeleton support structure in an aircraft. As Figure 1 shown, the bottom of the C-shaped beam is composed of a web a, and the two side edges of the C-shaped beam are composed of flanges b fixed on both sides of the web a. The C-shaped beam is generally processed by milling. In order to improve the strength of the C-shaped beam, generally, stiffening ribs are added inside the C-shaped beam and the C-shaped beam is made of composite materials.

[0004] When the C-shaped beam is being processed, considering the installation problem and the weight reduction problem, holes usually need to be drilled on the side wall of the flange b. Currently, most of the time, the web of the C-shaped beam is adsorbed and fixed by a vacuum adsorption device, while the two flange surfaces on both sides of the beam body are in a free state. Since the wall thickness of the flange is relatively thin, when drilling, it is easily deformed around the hole due to the impact of the drill bit, resulting in stress concentration and uneven distribution at the drilling edge. This not only poses a risk of accelerating the generation and expansion of fatigue cracks, but also reduces the stiffness of the C-shaped beam as a support structure, having a non-negligible impact on the safety of the fuselage during long-term flight. Summary of the Invention

[0005] The purpose of the present invention is to provide a deformation control device and control method for processing aircraft thin-walled parts, so as to solve the problem of deformation around the hole caused by the impact of the drill bit when drilling the flange of the C-shaped beam at present.

[0006] The technical solution of the present invention is as follows:

[0007] A deformation control device for machining aircraft thin-walled parts, comprising a vacuum adsorption table, a lifting mechanism, a sliding component, a contact part and a spacing adjustment mechanism; the vacuum adsorption table is strip-shaped and is used to fix the bottom of the C-shaped beam; the lifting mechanism is arranged above the vacuum adsorption table, and the output end of the lifting mechanism is connected with a mounting frame; the sliding component includes a slide rail and a slider, the slide rail is arranged along the width direction of the vacuum adsorption table, and one end of the slide rail is fixed to the side wall of the mounting frame, and the slider is slidably connected in the slide rail; the contact part includes a first contact plate and a second contact plate, the first contact plate and the second contact plate are arranged vertically and parallel, and the upper ends of the first contact plate and the second contact plate are both fixed to the bottom of the slider, the first contact plate is used to contact with the outer side wall of the C-shaped beam, the second contact plate is used to contact with the inner side wall of the C-shaped beam, a drilling guide hole is penetrated through the side wall of the first contact plate, and a discharge hole is penetrated through the side wall of the second contact plate, and the drilling guide hole and the discharge hole are coaxially and oppositely arranged; the spacing adjustment mechanism is arranged between the second contact plate and the mounting frame and is used to adjust the horizontal spacing between the second contact plate and the mounting frame.

[0008] Preferably, the mounting frame is a U-shaped frame, and the opening of the U-shaped frame is downward, and the spacing adjustment mechanism includes two sets of screw transmission components and a driving component; the two sets of screw transmission components are arranged in parallel on the upper and lower sides of the discharge hole, and each set of screw transmission components includes a screw and a threaded sleeve, the screw is penetrated through the side wall of the U-shaped frame and is rotatably connected to the side wall of the U-shaped frame through a bearing, one end of the threaded sleeve is fixed to the inner side wall of the second contact plate, one end of the screw is penetrated through the other end of the threaded sleeve and is threadedly connected to the threaded sleeve; the output end of the driving component is connected to the two screws and is used to drive the two screws to rotate synchronously.

[0009] Preferably, the driving component includes a first motor, a gear transmission component and a synchronous belt transmission component; the first motor is fixed on the inner wall of the U-shaped frame; the gear transmission component includes two meshing gears, one of the gears is sleeved and fixed on the output shaft of the first motor, and the other gear is sleeved and fixed on a screw adjacent to the first motor; the synchronous belt transmission component includes two synchronous belt wheels and a synchronous belt, the two synchronous belt wheels are respectively sleeved and fixed on the two screws, and the two synchronous belt wheels are connected by the synchronous belt.

[0010] Preferably, it further includes an elastic clamping and positioning member, which includes a first clamping member, a spring, a second clamping member and two connecting rods; the first clamping member is a strip-shaped clamping seat, which is slidably connected in the cavity formed by the first bottom plate and the second bottom plate, and is used for clamping the top of the side wall of the C-shaped beam; the spring is arranged vertically, and the two ends of the spring are respectively connected to the top of the strip-shaped clamping seat and the bottom of the slider; the second clamping member is an L-shaped clamping seat, which is arranged below the second bottom plate and is used for clamping the corner formed between the inner side wall of the C-shaped beam and the inner bottom surface of the C-shaped beam; the two connecting rods are located on both sides of the slide rail, and each connecting rod includes a first vertical part, a bent part and a second vertical part that are connected in sequence from head to tail. The head end of the first vertical part is fixed to the top of the first clamping member, and a through hole for the second vertical part to pass through is opened on the second bottom plate. The tail end of the second vertical part is fixed to the horizontal end surface of the second clamping member after passing through the through hole.

[0011] Preferably, the slide rail includes a slide base and a dovetail chute opened at the bottom of the slide base. One end of the slide base is fixed to the side wall of the U-shaped frame. The slider is a dovetail slider, and the dovetail slider is slidably connected in the dovetail chute. The bottoms of the dovetail sliders are respectively fixed to the upper ends of the first bottom plate and the second bottom plate.

[0012] Preferably, the drilling guide hole has a first tapered section and a straight section, and the large-diameter end of the tapered section is located at the outer side wall of the first bottom plate. The small diameter of the tapered section is the same as the diameter of the straight section. The discharge hole is a tapered hole, and the small diameter of the tapered hole is arranged opposite to the straight section, and the small diameter of the tapered hole is the same as the diameter of the straight section.

[0013] Preferably, there are two sets of the sliding assembly, the abutting part, the elastic clamping and positioning member and the two threaded sleeves, and they are symmetrically arranged on both sides of the U-shaped frame. The screw rod is a bidirectional screw rod, and the two ends of the bidirectional screw rod pass through the side walls on both sides of the U-shaped frame and are respectively threadedly connected to the threaded sleeves on both sides.

[0014] Preferably, the bottom of each first bottom plate extends below the bottom of the L-shaped clamping seat, and an inclined guide surface is fixed to the bottom of each first bottom plate.

[0015] Preferably, an installation groove is opened on the inner wall of each first bottom plate close to the guide surface, and a first pressure sensor is arranged in the installation groove. An installation groove is opened at the bottom of each strip-shaped clamping seat, and a second pressure sensor is arranged in the installation groove. An installation groove is opened at the bottom of each L-shaped clamping seat, and a third pressure sensor is arranged in the installation groove. Each first pressure sensor, each second pressure sensor, each third pressure sensor, the lifting mechanism and the first motor are respectively electrically connected to an external controller.

[0016] The present invention also discloses a control method for a deformation control device for machining aircraft thin-walled parts based on the above, including the following steps;

[0017] Place the C-shaped beam on the vacuum adsorption table;

[0018] Control the lifting mechanism to drive the U-shaped frame to descend through the controller until the inner walls of the two first pressing plates provided with pressure sensors move to the outside of the two side walls of the C-shaped beam, and stop descending when the second clamping member is located above the side wall of the C-shaped beam;

[0019] Control the first motor to drive the two bidirectional screws to rotate synchronously through the controller, adjust the distance between the two first pressing plates, and make the two first pressing plates contact and abut against the two sides of the C-shaped beam to form centering clamping on the two sides of the C-shaped beam, ensuring that the C-shaped beam is located at the center of the vacuum adsorption table. The controller automatically controls the first motor to stop rotating after the pressure value detected by the first pressure sensor changes to reach the set range value;

[0020] Start the vacuum adsorption table and use the vacuum adsorption table to adsorb and fix the bottom of the C-shaped beam;

[0021] Control the lifting mechanism to continue driving the U-shaped frame to descend through the controller, so that the side wall of the C-shaped beam is located between the first pressing plate and the second pressing plate. The L-shaped clamping seat clamps the corner through the spring compression deformation and the strip-shaped clamping seat clamps the top of the side wall of the C-shaped beam. The controller automatically controls the first motor to stop rotating after the pressure values detected by the second pressure sensor and the third pressure sensor change to reach the set range value;

[0022] Use the drilling device to drill the side wall of the C-shaped beam under the positioning of the drilling guide hole and the discharge hole.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. By setting the cooperation of the distance adjustment mechanism and the lifting mechanism, the positions of the first pressing plate and the second pressing plate can be adjusted, so that the first pressing plate abuts against the outer side wall of the C-shaped beam, and the second pressing plate abuts against the inner side wall of the C-shaped beam. Since the drilling guide hole and the discharge hole are coaxially and oppositely arranged, the drill is used to drill the side wall of the C-shaped beam along the drilling guide hole. During the drilling process, both sides of the hole wall are abutted and limited by the first pressing plate and the second pressing plate, avoiding deformation caused by the impact of the drill bit, and the drilled waste chips are discharged through the discharge hole.

[0025] 2. The distance adjustment mechanism provided can perform drilling positioning on the side walls of C-shaped beams with different widths, and has a wide application range.

[0026] 3. The lifting mechanism provided can adaptively adjust the height of the drilling hole position according to requirements. Brief Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of a C-shaped beam in the prior art.

[0028] Figure 2 It is a schematic three-dimensional structure diagram of a deformation control device for machining aircraft thin-walled parts according to an embodiment of the present invention.

[0029] Figure 3 It is a schematic three-dimensional diagram of a part of the structure in a deformation control device for machining aircraft thin-walled parts according to an embodiment.

[0030] Figure 4 For the present invention Figure 3 It is a schematic front sectional view structure diagram.

[0031] Figure 5 For the present invention Figure 4 It is a partial enlarged schematic diagram at A in the present invention.

[0032] Figure 6 For the present invention Figure 4 It is a partial enlarged schematic diagram at B in the present invention.

[0033] Figure 7 It is a schematic rear three-dimensional structure diagram of the second female card board in a deformation control device for machining aircraft thin-walled parts according to an embodiment of the present invention. Specific embodiments

[0034] Next, in combination with the attached Figure 1 To the attached Figure 7 , the specific embodiments of the present invention will be described in detail. In the description of the invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of the invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0036] Embodiment 1

[0037] As Figures 2 to 7As shown in the figure, an embodiment of the present invention provides a deformation control device for machining aircraft thin-walled parts, including a vacuum adsorption table 1, a lifting mechanism 2, a sliding assembly, a contact portion, and a spacing adjustment mechanism; the vacuum adsorption table 1 is in a long strip shape and is used to fix the bottom of the C-shaped beam; the lifting mechanism 2 is arranged above the vacuum adsorption table 1, and the output end of the lifting mechanism 2 is connected with a mounting frame 21; the sliding assembly includes a slide rail 31 and a slider 32, the slide rail 31 is arranged along the width direction of the vacuum adsorption table 1, and one end of the slide rail 31 is fixed to the side wall of the mounting frame 21, and the slider 32 is slidably connected in the slide rail 31; the contact portion includes a first contact plate 41 and a second contact plate 42, the first contact plate 41 and the second contact plate 42 are arranged vertically and parallel to each other, and the upper ends of the first contact plate 41 and the second contact plate 42 are both fixed to the bottom of the slider 32, the first contact plate 41 is used to contact the outer side wall of the C-shaped beam, the second contact plate 42 is used to contact the inner side wall of the C-shaped beam, a drilling guide hole 411 is penetrated through the side wall of the first contact plate 41, and a discharge hole 421 is penetrated through the side wall of the second contact plate 42, and the drilling guide hole 411 and the discharge hole 421 are coaxially and oppositely arranged; the spacing adjustment mechanism is arranged between the second contact plate 42 and the mounting frame 21 and is used to adjust the horizontal spacing between the second contact plate 42 and the mounting frame 21.

[0038] In this embodiment, when drilling the side wall of the C-shaped beam, the C-shaped beam is fixed by the vacuum adsorption of the provided vacuum adsorption table 1 to prevent displacement during drilling. After the C-shaped beam is fixed, the horizontal spacing between the second contact plate 42 and the mounting frame 21 is adjusted by the spacing adjustment mechanism. Since the first contact plate 41 and the second contact plate 42 are fixed by the slider 32, when the second contact plate 42 moves, it will drive the slider 32 to move along the slide rail 31, thereby synchronously driving the first contact plate 41 to move, so that the first contact plate 41 is located outside the side wall of the C-shaped beam, and the second contact plate 42 is located inside the side wall of the C-shaped beam. Then, the provided lifting mechanism 2 drives the mounting frame 21, the first contact plate 41, and the second contact plate 42 to descend synchronously, so that the first contact plate 41 moves and contacts the outer side wall of the C-shaped beam, and the second contact plate 42 moves and contacts the inner side wall of the C-shaped beam. Continue to adjust the height position of the drilling by the lifting mechanism 2. After adjustment, stop the lifting. At this time, since the drilling guide hole 411 and the discharge hole 421 are coaxially and oppositely arranged, a drill is used to drill the side wall of the C-shaped beam along the drilling guide hole 411. During the drilling process, both sides of the hole wall are limited by the first contact plate 41 and the second contact plate 42 to avoid deformation caused by the impact of the drill bit, and the drilled waste chips are discharged through the discharge hole 421.

[0039] Specifically, such as Figure 3As shown, the mounting bracket 21 is a U-shaped bracket, and the opening of the U-shaped bracket is downward. As a specific embodiment of the spacing adjustment mechanism, the spacing adjustment mechanism in this embodiment includes two sets of screw drive assemblies and a drive assembly; the two sets of screw drive assemblies are arranged in parallel on the upper and lower sides of the discharge hole 421. Each set of screw drive assemblies includes a screw 51 and a threaded sleeve 52. The screw 51 is passed through the side wall of the U-shaped bracket and is rotatably connected to the side wall of the U-shaped bracket through a bearing. One end of the threaded sleeve 52 is fixedly connected to the inner side wall of the second abutting plate 42. One end of the screw 51 is passed through the other end of the threaded sleeve 52 and is threadedly connected to the threaded sleeve 52; the output end of the drive assembly is connected to the two screws 51 and is used to drive the two screws 51 to rotate synchronously, and drive the threaded sleeve 52 and the second abutting plate 42 to move by using the screw drive principle. Since the two threaded sleeves 52 are located on the upper and lower sides of the discharge hole 421, during drilling, a support reaction force can be provided to the second abutting plate 42 to prevent the impact of the drill bit during drilling.

[0040] Among them, the drive assembly includes a first motor 53, a gear transmission assembly and a synchronous belt transmission assembly; the first motor 53 is fixed on the inner wall of the U-shaped bracket; the gear transmission assembly includes two meshing gears 54, one of the gears 54 is sleeved and fixed on the output shaft of the first motor 53, and the other gear 54 is sleeved and fixed on a screw 51 adjacent to the first motor 53; the synchronous belt transmission assembly includes two synchronous belt pulleys 55 and a synchronous belt 56. The two synchronous belt pulleys 55 are respectively sleeved and fixed on the two screws 51, and the two synchronous belt pulleys 55 are connected by the synchronous belt 56. By controlling the first motor 53 to drive the gear 54 to rotate, one of the screws 51 will be driven to rotate through the transmission of the gear transmission assembly. Since the two screws 51 are connected by the synchronous belt transmission assembly, under the transmission of the synchronous belt transmission assembly, the two screws 51 will rotate synchronously, thereby synchronously driving the two threaded sleeves 52 to move.

[0041] Further, in order to be able to hold and position the top of the side wall of the C-shaped beam and the corner formed between the inner side wall of the C-shaped beam and the U-shaped inner bottom surface during the drilling operation, and to prevent deformation of these weak points, an elastic holding and positioning member is further included. The elastic holding and positioning member includes a first clamping member 61, a spring 62, a second clamping member 63, and two connecting rods 64; the first clamping member 61 is a strip-shaped clamping seat, which is slidably connected in the cavity formed by the first bottom plate 41 and the second bottom plate 42, and is used to hold the top of the side wall of the C-shaped beam; the spring 62 is arranged vertically, and both ends of the spring 62 are respectively connected to the top of the strip-shaped clamping seat and the bottom of the slider 32; the second clamping member 63 is an L-shaped clamping seat, which is arranged below the second bottom plate 42 and is used to hold the corner formed between the inner side wall of the C-shaped beam and the inner bottom surface of the C-shaped beam; the two connecting rods 64 are located on both sides of the slide rail 31, and each connecting rod 64 includes a first vertical portion 641, a bent portion 642, and a second vertical portion 643 that are connected end to end in sequence. The head end of the first vertical portion 641 is fixed to the top of the first clamping member 61, a through hole for the second vertical portion 643 to pass through is provided on the second bottom plate 42, and the tail end of the second vertical portion 643 is fixed to the horizontal end face of the second clamping member 63 after passing through the through hole.

[0042] In another embodiment of the present invention, as Figure 3 and Figure 4 shown, considering that when adjusting the horizontal distance between the second bottom plate 42 and the mounting frame 21 through the spacing adjusting mechanism, since the second bottom plate 42 is connected to the first bottom plate 41 through the slider 32, the three will move simultaneously and have a gravity effect on the threaded sleeve 52 during the movement process, resulting in deformation of the threaded sleeve 52 and making it difficult to cooperate with the screw rod 51. Therefore, the slide rail 31 includes a slide seat and a dovetail chute opened at the bottom of the slide seat. One end of the slide seat is fixed to the side wall of the U-shaped frame. The slider 32 is a dovetail-shaped slider, and the dovetail-shaped slider is slidably connected in the dovetail chute. The bottoms of the dovetail-shaped sliders are fixed to the upper ends of the first bottom plate 41 and the second bottom plate 42 respectively. Through the cooperation of the provided dovetail chute and the dovetail-shaped slider, a vertical support effect can be achieved during the movement process, thereby reducing the problem of gravity extrusion deformation of the threaded sleeve 52.

[0043] In another embodiment of the present invention, as Figure 5 shown, the drilling guide hole 411 has a first tapered section and a straight section, and the large-diameter end of the tapered section is located at the outer side wall of the first bottom plate 41. The small diameter of the tapered section is the same as the diameter of the straight section. The discharge hole 421 is a tapered hole, and the small diameter of the tapered hole is set to face the straight section, and the small diameter of the tapered hole is the same as the diameter of the straight section.

[0044] In another embodiment of the present invention, as Figure 2 and Figure 3As shown, in order to drill the two side walls of the C-shaped beam synchronously at one time and reduce the drilling process, there are two sets of sliding components, abutting parts, elastic clamping and positioning parts and two threaded sleeves 52, which are symmetrically arranged on both sides of the U-shaped frame. The screw rod 51 is a bidirectional screw rod. The two ends of the bidirectional screw rod pass through the side walls on both sides of the U-shaped frame and are respectively threadedly connected to the threaded sleeves 52 on both sides.

[0045] Furthermore, as Figure 3 shown, the bottom of each first abutting plate 41 extends below the bottom of the L-shaped clamping seat, and an inclined guide surface 412 is fixed to the bottom of each first abutting plate 41. By means of the arranged guide surface 412, it is convenient to centeringly clamp the C-shaped beam with the two first abutting plates 41.

[0046] Furthermore, as Figure 3 and Figure 4 shown, in order to avoid damage caused by excessive clamping force when centeringly clamping the C-shaped beam with the two first abutting plates 41, mounting grooves are formed in the inner walls of each first abutting plate 41 close to the guide surface 412, and first pressure sensors 71 are arranged in the mounting grooves. As Figure 6 shown, in order to ensure that the pressure will not be too large and avoid damage when pressing and positioning the top of the side wall of the C-shaped beam with the strip-shaped clamping seat, mounting grooves are formed in the bottom of each strip-shaped clamping seat, and second pressure sensors 72 are arranged in the mounting grooves. As Figure 4 shown, in order to ensure that the pressure will not be too large and avoid damage when pressing and positioning the inner bottom surface of the C-shaped beam with the L-shaped clamping seat, mounting grooves are formed in the bottom of each L-shaped clamping seat, and third pressure sensors 73 are arranged in the mounting grooves. Each first pressure sensor 71, each second pressure sensor 72, each third pressure sensor 73, the lifting mechanism 2 and the first motor 53 are respectively electrically connected to an external controller.

[0047] In another embodiment of the present invention, as Figure 2 and Figure 7As shown in the figure, in order to perform multi-position drilling operations on the side walls of the C-shaped beam along the length direction of the C-shaped beam, brackets 91 are provided on the left and right sides of the vacuum adsorption table 1. A linear movement mechanism is provided between the two brackets 91. The linear movement mechanism is used to drive the lifting mechanism 2 and each structure connected to the U-shaped frame to move along the length direction of the vacuum adsorption table 1. The linear movement mechanism includes a second motor 92, a lead screw 93, a bearing seat, a nut seat 94, and a guide rail assembly 95. The second motor 92 is fixed on the top of one of the brackets 91. The second motor 92 is electrically connected to an external controller. The bearing seat is fixed on the top of the other bracket 91 and is disposed opposite to the second motor 92. One end of the lead screw 93 is connected to the output shaft of the second motor 92 through a coupling. The other end of the lead screw 93 is rotatably connected to the bearing seat. The guide rail assembly 95 includes two symmetrically arranged L-shaped guide frames. The two ends of the L-shaped guide frames are respectively fixed to the side walls of the two brackets 91. A gap is formed between the two L-shaped guide frames. The nut seat 94 is sleeved on the lead screw 93. The lower part of the nut seat 94 is slidably connected between the two L-shaped guide frames. The lifting mechanism 2 is an electric cylinder. The cylinder body of the electric cylinder passes through the gap formed between the two L-shaped guide frames and is fixed to the bottom of the nut seat 94. The telescopic rod end of the electric cylinder is fixed to the top of the U-shaped frame. By controlling the second motor 92 through the controller to drive the lead screw 93 to rotate, while the lead screw 93 rotates, since the two L-shaped guide frames limit the nut seat 94, the rotational motion can be converted into a linear motion, thereby driving the nut seat 94 to move between the two L-shaped guide frames, and further driving the electric cylinder and each structure provided on the U-shaped frame to synchronously perform multi-position drilling operations on the side walls of the C-shaped beam along the length direction of the C-shaped beam. Embodiment 2

[0048] Based on Embodiment 1, this embodiment provides a control method for a deformation control device for machining aircraft thin-walled parts, including the following steps;

[0049] Place the C-shaped beam on the vacuum adsorption table 1;

[0050] Through the controller, control the lifting mechanism 2 to drive the U-shaped frame to descend until the inner walls of the two first pressing plates 41 provided with the pressure sensors 7 move to the outside of the two side walls of the C-shaped beam, and stop descending when the second clamping member 63 is located above the side wall of the C-shaped beam;

[0051] Through the controller, control the first motor 53 to drive the two bidirectional screws to rotate synchronously, adjust the distance between the two first pressing plates 41, and make the two first pressing plates 41 contact and abut against the two sides of the C-shaped beam to form a centering clamp on the two sides of the C-shaped beam, ensuring that the C-shaped beam is located at the center of the vacuum adsorption table 1. When the change in the pressure value detected by the first pressure sensor 71 reaches the set range value, the controller automatically controls the first motor 53 to stop rotating;

[0052] Start the vacuum adsorption table 1, and use the vacuum adsorption table 1 to adsorb and fix the bottom of the C-shaped beam;

[0053] Control the lifting mechanism 2 to continue driving the U-shaped frame to descend through the controller, so that the side wall of the C-shaped beam is located between the first bottom plate 41 and the second bottom plate 42. The L-shaped clamping seat clamps the corner through the compression deformation of the spring 62 and the strip-shaped clamping seat clamps the top of the side wall of the C-shaped beam. After the controller automatically controls the first motor 53 to stop rotating according to the pressure value changes detected by the second pressure sensor 72 and the third pressure sensor 73 reaching the set range value;

[0054] Use the drilling device to drill the side wall of the C-shaped beam under the positioning of the drilling guide hole 411 and the discharge hole 421.

[0055] The above only discloses several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A deformation control device for processing aircraft thin-walled parts, comprising a vacuum adsorption table (1), which is in the shape of a long strip and is used to fix the bottom of a C-shaped beam, characterized in that: Also includes: A lifting mechanism (2) is arranged above the vacuum adsorption platform (1), and an output end of the lifting mechanism (2) is connected to a mounting frame (21); A sliding assembly, comprising a sliding rail (31) and a sliding block (32), wherein the sliding rail (31) is arranged along the width direction of the vacuum adsorption platform (1), and one end of the sliding rail (31) is fixed to the side wall of the mounting frame (21), and the sliding block (32) is slidably connected in the sliding rail (31); The abutment portion comprises a first abutment plate (41) and a second abutment plate (42), wherein the first abutment plate (41) and the second abutment plate (42) are arranged vertically and in parallel, and the upper end of the first abutment plate (41) and the upper end of the second abutment plate (42) are both fixed to the bottom of the slider (32), the first abutment plate (41) is used to abut against the outer side wall of the C-shaped beam, and the second abutment plate (42) is used to abut against the inner side wall of the C-shaped beam, a drilling guide hole (411) is provided through the side wall of the first abutment plate (41), and a discharge hole (421) is provided through the side wall of the second abutment plate (42), and the drilling guide hole (411) and the discharge hole (421) are arranged coaxially and directly opposite to each other; A spacing adjustment mechanism is provided between the second abutment plate (42) and the mounting frame (21) and is used to adjust the horizontal spacing between the second abutment plate (42) and the mounting frame (21); The elastic clamping positioning member includes: a first clamping member (61), which is a strip clamping seat, slidably connected in a cavity formed by the first abutment plate (41) and the second abutment plate (42), and used to clamp the top of the C-shaped beam side wall; a spring (62), which is vertically arranged, and the two ends of the spring (62) are respectively connected to the top of the strip clamping seat and the bottom of the slider (32); a second clamping member (63), which is an L-shaped clamping seat, is arranged below the second abutment plate (42), and is used to clamp the inner side wall of the C-shaped beam and the inner bottom surface of the C-shaped beam. The two connecting rods (64) are located on both sides of the slide rail (31), and each connecting rod (64) includes a first vertical portion (641), a bent portion (642) and a second vertical portion (643) which are connected in sequence from head to tail. The head end of the first vertical portion (641) is fixed to the top of the first clamping member (61), and the second abutment plate (42) is provided with a through hole for the second vertical portion (643) to pass through. The tail end of the second vertical portion (643) is fixed to the horizontal end face of the second clamping member (63) after passing through the through hole. The mounting frame (21) is a U-shaped frame, and the opening of the U-shaped frame is arranged downward. The spacing adjustment mechanism comprises: two groups of screw transmission assemblies, which are arranged in parallel on the upper and lower sides of the discharge hole (421), each group of screw transmission assemblies comprises a screw (51) and a threaded sleeve (52), the screw (51) is passed through the side wall of the U-shaped frame and is rotatably connected to the side wall of the U-shaped frame through a bearing, one end of the threaded sleeve (52) is fixedly connected to the inner side wall of the second abutment plate (42), one end of the screw (51) is passed through the inside of the other end of the threaded sleeve (52) and is threadedly connected to the threaded sleeve (52); a driving assembly, the output end of which is connected to the two screws (51) and is used to drive the two screws (51) to rotate synchronously; The sliding assembly, the abutment portion, the elastic clamping positioning member and the two threaded sleeves (52) are in two groups and are symmetrically arranged on both sides of the U-shaped frame. The screw rod (51) is a bidirectional screw rod. The two ends of the bidirectional screw rod pass through the side walls of the U-shaped frame and are respectively threadedly connected with the threaded sleeves (52) on both sides. The bottom of each first abutment plate (41) extends to below the bottom of the L-shaped card seat, and an inclined guide surface (412) is fixed to the bottom of each first abutment plate (41).

2. The deformation control device for processing aircraft thin-walled parts according to claim 1, characterized in that: The drive assembly comprises: A first motor (53) is fixed on the inner wall of the U-shaped frame; A gear transmission assembly, comprising two mutually meshing gears (54), wherein one gear (54) is sleeved and fixed on the output shaft of the first motor (53), and the other gear (54) is sleeved and fixed on a screw rod (51) adjacent to the first motor (53); The synchronous belt transmission assembly comprises two synchronous belt wheels (55) and a synchronous belt (56). The two synchronous belt wheels (55) are respectively fixed on two screw rods (51), and the two synchronous belt wheels (55) are connected by the synchronous belt (56).

3. The deformation control device for processing aircraft thin-walled parts according to claim 1, characterized in that: The slide rail (31) includes a slide seat and a dovetail slide groove opened at the bottom of the slide seat, one end of the slide seat is fixed to the side wall of the U-shaped frame, the slider (32) is a dovetail slider, the dovetail slider is slidably connected in the dovetail slide groove, and the bottom of the dovetail slider is fixed to the upper end of the first support plate (41) and the upper end of the second support plate (42).

4. The deformation control device for processing aircraft thin-walled parts according to claim 1, characterized in that: The drilling guide hole (411) has a first conical section and a straight section, and the large-diameter end of the conical section is located at the outer wall of the first abutment plate (41), and the small-diameter end of the conical section is the same as the diameter of the straight section. The discharge hole (421) is a conical hole, and the small-diameter end of the conical hole is arranged opposite to the straight section, and the small-diameter end of the conical hole is the same as the diameter of the straight section.

5. The deformation control device for processing aircraft thin-walled parts according to any one of claims 2 to 4, characterized in that: Each of the first abutment plates (41) is provided with a mounting groove on its inner wall near the guide surface (412), and a first pressure sensor (71) is provided in the mounting groove; each of the strip-shaped card seats is provided with a mounting groove at the bottom, and a second pressure sensor (72) is provided in the mounting groove; each of the L-shaped card seats is provided with a mounting groove at the bottom, and a third pressure sensor (73) is provided in the mounting groove; each of the first pressure sensors (71), each of the second pressure sensors (72), each of the third pressure sensors (73), the lifting mechanism (2) and the first motor (53) are electrically connected to an external controller respectively.

6. A deformation control method for machining thin-walled aircraft parts, implemented by using the deformation control device according to claim 5, characterized in that: The steps include: Placing the C-shaped beam on the vacuum adsorption table (1); The lifting mechanism (2) is controlled by a controller to drive the U-shaped frame to descend until the inner walls of the two first abutment plates (41) provided with the pressure sensors (7) move to the outside of the two side walls of the C-shaped beam and the second clamping member (63) is located above the side walls of the C-shaped beam and stops descending; The controller controls the first motor (53) to drive the two bidirectional screws to rotate synchronously, adjusts the distance between the two first abutment plates (41), and makes the two first abutment plates (41) contact and abut against the two sides of the C-shaped beam to form a centering clamp for the two sides of the C-shaped beam, thereby ensuring that the C-shaped beam is located at the center of the vacuum adsorption platform (1); the controller automatically controls the first motor (53) to stop rotating after the pressure value detected by the first pressure sensor (71) reaches a set range value; The vacuum adsorption platform (1) is started, and the bottom of the C-shaped beam is adsorbed and fixed by the vacuum adsorption platform (1); The controller controls the lifting mechanism (2) to continue to drive the U-shaped frame downward, so that the side wall of the C-shaped beam is located between the first abutment plate (41) and the second abutment plate (42), and the L-shaped clamping seat clamps the corner and the strip clamping seat clamps the top of the side wall of the C-shaped beam through compression deformation of the spring (62). The controller automatically controls the first motor (53) to stop rotating after the pressure value detected by the second pressure sensor (72) and the third pressure sensor (73) reaches a set range value; The drilling device is used to drill holes on the side wall of the C-shaped beam under the positioning of the drilling guide hole (411) and the discharge hole (421).

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