A pipe expansion device for aircraft production

Abstract

The present invention relates to the technical field of aircraft pipe processing, and discloses a pipe expanding device for aircraft production, including an operating table, a positioning mechanism is fixedly installed on the upper end of the operating table, a mounting plate is fixedly installed on the rear of the upper end of the operating table, a slide groove is opened at the front end of the mounting plate, a expanding mechanism is slidably connected in the slide groove, a No. 1 forward and reverse motor is fixedly installed on the upper end of the mounting plate, a transmission screw is fixedly installed on the output end of the No. 1 forward and reverse motor, the transmission screw is movably connected in the slide groove and is threadedly connected to the rear of the expanding mechanism; the expanding mechanism includes a lifting plate, a rotating device is movably installed on the lower end of the lifting plate, and a expanding device is arranged at the lower end of the rotating device. The present invention is not only innovative and reasonable in structural design, but also shows the characteristics of high efficiency, precision, flexibility and easy maintenance in practical applications, has significant advantages in improving production efficiency and product quality, and can be widely used in the expanding processing of various pipes.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft pipe processing, and in particular to a pipe expanding device for aircraft production. Background Art

[0002] In the modern aerospace industry, aircraft production has extremely strict requirements on the manufacturing accuracy and quality of parts, especially in the processing of pipe fittings. Existing pipe expansion devices usually use mechanical fixtures or manual fixing methods for positioning. This method relies on the experience and skills of the operator and is prone to positioning deviations. This deviation will cause the pipe to shift or tilt during the processing process, seriously affecting the accuracy and consistency of the expansion. Especially in the production of aircraft with high precision requirements, this error may directly affect the performance and safety of the aircraft. Secondly, a single linear motion or rotational motion is often used to achieve expansion. This method is prone to local over-expansion or insufficient expansion during the expansion process, resulting in uneven expansion, which not only affects the strength and sealing of the pipe fittings, but also reduces the service life and reliability of the pipe fittings, and may also cause serious safety accidents. Finally, the existing expansion devices are usually fixed in design and difficult to adapt to pipe fittings of different specifications and materials. For pipe fittings of different diameters, wall thicknesses or materials, the equipment needs to be frequently replaced or adjusted, which increases the complexity of operation and maintenance costs. Poor adaptability limits the scope of application of the equipment, making it difficult for enterprises to respond flexibly when facing diversified production needs, affecting the flexibility and efficiency of production. Therefore, we propose a pipe expanding device for aircraft production. Summary of the invention

[0003] The main purpose of the present invention is to provide a pipe expanding device for aircraft production, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A pipe expansion device for aircraft production, comprising an operating table, a positioning mechanism is fixedly installed on the upper end of the operating table, a mounting plate is fixedly installed on the rear part of the upper end of the operating table, a slide groove is opened at the front end of the mounting plate, a expanding mechanism is slidably connected in the slide groove, a No. 1 forward and reverse motor is fixedly installed on the upper end of the mounting plate, a transmission screw is fixedly installed on the output end of the No. 1 forward and reverse motor, the transmission screw is movably connected in the slide groove and is threadedly connected to the rear part of the expanding mechanism, and a control panel is fixedly installed on the right end of the operating table;

[0006] The flaring mechanism comprises a lifting plate, a transmission block is fixedly mounted on the rear end of the lifting plate, the transmission block is slidably connected in the slide groove and is threadedly connected to the transmission screw, a rotating device is movably mounted on the lower end of the lifting plate, a flaring device is arranged on the lower end of the rotating device, and a support frame is fixedly mounted on one end of the lifting plate;

[0007] The rotating device includes a rotating table and a driving motor. A mounting rod is fixedly installed on the upper end of the rotating table, a transmission gear is fixedly installed on the upper end of the mounting rod, the driving motor is fixedly installed in a supporting frame, and a driving gear is fixedly installed on the output end of the driving motor through a rotating shaft, and the driving gear and the transmission gear are located in the same plane and mesh with each other.

[0008] As a further improvement of the above solution, the expansion device includes a driving body, which is coaxially arranged with the rotating table and movably connected to the rotating table via a bearing, and four expansion bodies are transmission-connected to the driving body.

[0009] By adopting the above technical solution: the driving body in the expanding device is coaxially arranged with the rotating table, ensuring that the two remain on the same axis during the rotation process, so that the rotational motion of the rotating table can be directly transmitted to the driving body, ensuring the stability and consistency of the expanding device during the rotation process, avoiding vibration and processing errors caused by eccentricity, and improving the accuracy and uniformity of the expanding.

[0010] As a further improvement of the above solution, four slide rails are fixedly installed on the lower end of the rotating table, and the four slide rails are arranged in a ring array, and the four expansion bodies are slidably connected to the four slide rails respectively.

[0011] By adopting the above technical solution: the expansion body is slidably connected to the rotating table through the slide rail, the structure is compact, the transmission is stable, and the expansion process is smoother and more efficient.

[0012] As a further improvement of the above scheme, the driving body includes a No. 2 forward and reverse motor, and the No. 2 forward and reverse motor rotates and installs the upper end of the transmission gear, and the output end of the No. 2 forward and reverse motor is fixedly installed with a rotating rod, and the lower end of the rotating rod sequentially passes through the transmission gear, the mounting rod and the rotating table, and is fixedly installed with a rotating plate, and the rotating rod is movably connected to the rotating table through a bearing, and the outer surface of the rotating plate is integrally formed with four connecting rings, and the four connecting rings are movably connected with traction rods.

[0013] As a further improvement of the above scheme, the expansion body includes a movable plate, a sliding sleeve is fixedly installed on the upper end of the movable plate, the sliding sleeve is slidably connected to the lower end of the rotating table through a sliding rail, a sleeve seat and a connecting rod are fixedly installed on the lower end of the movable plate, and an electric heating rod is detachably installed in the sleeve seat.

[0014] By adopting the above technical solution: the connecting rod is pushed by the traction rod, and then the movable plate moves outward along the slide rail, so as to realize the expansion operation of the pipe opening, increase the adaptability of the equipment, and be able to handle pipes of different specifications.

[0015] As a further improvement of the above scheme, the upper end of the electric heating rod is integrally formed with a spline seat, and the lower end of the sleeve is provided with a spline groove adapted to the spline seat. The spline seat is clamped in the spline groove to fix the electric heating rod to the lower end of the sleeve.

[0016] By adopting the above technical solution: the electric heating rod can be quickly replaced through the cooperation of the spline seat and the spline groove, which reduces the downtime and the maintenance cost.

[0017] As a further improvement of the above solution, two adjacent traction rods are movably connected to the upper and lower sides of two adjacent connecting rings respectively, and the four traction rods are movably connected to the four connecting rods respectively.

[0018] By adopting the above technical solution: combining the rotational motion of the rotating device with the linear motion of the expanding device, the expanding process is made smoother and more efficient. The rotation of the rotating table ensures the uniform expanding of the expanding device at the opening of the pipe fitting, while the outward movement of the movable plate realizes the gradual expansion of the expanding, which not only improves the quality of the expanding, but also increases the adaptability of the equipment, and can handle pipe fittings of different specifications.

[0019] As a further improvement of the above scheme, the positioning mechanism includes a bottom plate and a top plate, the bottom plate and the top plate have the same structure and are coaxially arranged up and down, three positioning bodies are fixedly installed between the bottom plate and the top plate, and the three positioning bodies are distributed in a ring array.

[0020] By adopting the above technical solution: the three positioning bodies are all synchronously controlled by the control panel.

[0021] As a further improvement of the above scheme, the positioning body includes a vertical plate and a sleeve rod, the upper and lower ends of the vertical plate are respectively fixedly connected to the top plate and the bottom plate, an electric cylinder is fixedly installed on the vertical plate, and the output end of the electric cylinder is fixedly connected to a positioning clamping plate, two sleeve rods are provided and both are fixedly connected to the vertical plate, two telescopic rods are fixedly installed on one end of the positioning clamping plate, and the two telescopic rods are respectively slidably connected in the two sleeve rods.

[0022] By adopting the above technical solution: using the positioning mechanism to push the positioning clamp outward through the electric cylinder, contacting and clamping the inner surface of the pipe body, ensuring that the pipe body remains stable during the processing.

[0023] As a further improvement of the above solution, the positioning clamp is made of rubber material, the end surface of the positioning clamp away from the telescopic rod is a curved surface structure, and the axis of the positioning mechanism coincides with the axis of the rotating table.

[0024] By adopting the above technical solution: the axis of the positioning mechanism coincides with the axis of the rotating table, ensuring that the center of the pipe body is completely aligned with the center of the rotating table, so that the pipe body always remains on the same axis during the rotational expansion process, avoiding processing errors caused by eccentricity, improving processing accuracy, and ensuring the uniformity and consistency of expansion. In addition, the positioning splint is made of rubber material and the end face is a curved surface structure, which can effectively prevent the pipe body from being displaced or damaged during the processing process.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the present invention, through the coordinated use of the positioning mechanism and the rotating device, the positioning mechanism is used to push the positioning clamping plate to move outward through the electric cylinder, so as to contact and clamp the inner surface of the pipe body, thereby providing a stable processing basis for the rotary expansion of the rotating device. At the same time, the axis of the positioning mechanism coincides with the axis of the rotating device, ensuring that the center of the pipe body is completely aligned with the center of the rotating table, so that the pipe body always remains on the same axis during the rotary expansion process, avoiding processing errors caused by eccentricity, improving processing accuracy, and ensuring the uniformity and consistency of expansion.

[0027] 2. In the present invention, the rotary motion of the rotary device is combined with the linear motion of the expanding device through the coordinated use of the rotary device and the expanding device, so that the expanding process is smoother and more efficient. The rotation of the rotary table ensures the uniform expanding of the expanding device at the opening of the pipe fitting, while the outward movement of the movable plate realizes the gradual expansion of the expanding, which not only improves the quality of the expanding, but also increases the adaptability of the equipment, and can handle pipe fittings of different specifications.

[0028] 3. In the present invention, the heating function of the electric heating rod is linked with the action of the expanding device, so that the pipe fitting can be locally heated during the expanding process to soften its material, thereby making the expanding operation easier, improving the quality of the expanding, reducing material damage, and extending the service life of the pipe fitting body. At the same time, the electric heating rod can be quickly replaced through the cooperation of the spline seat and the spline groove, reducing downtime and lowering maintenance costs.

[0029] 4. In summary, the present invention is not only innovative and reasonable in structural design, but also shows the characteristics of high efficiency, precision, flexibility and easy maintenance in practical applications. These characteristics make the pipe expanding device for aircraft production have significant advantages in improving production efficiency and product quality, and can be widely used in the expanding processing of various pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of the overall structure of a pipe expansion device for aircraft production according to the present invention;

[0032] Figure 2 It is a schematic diagram of the processing state of a pipe body of a pipe expanding device for aircraft production according to the present invention;

[0033] Figure 3 It is a structural schematic diagram of a expanding mechanism of a pipe expanding device for aircraft production according to the present invention;

[0034] Figure 4 It is a schematic diagram of the bottom structure of a expanding mechanism of a pipe expanding device for aircraft production according to the present invention;

[0035] Figure 5 It is a structural schematic diagram of a rotating device of a pipe expanding device for aircraft production according to the present invention;

[0036] Figure 6 It is a structural schematic diagram of a driving body of a pipe expanding device for aircraft production according to the present invention;

[0037] Figure 7 It is a schematic diagram of the connection between the expansion body and the rotating table of a pipe expansion device for aircraft production according to the present invention;

[0038] Figure 8 It is a structural schematic diagram of an expansion main body of a pipe expansion device for aircraft production according to the present invention;

[0039] Fig. 9 It is a structural schematic diagram of a positioning mechanism of a pipe expanding device for aircraft production according to the present invention;

[0040] Fig.10 It is a structural schematic diagram of a positioning body of a pipe expansion device for aircraft production according to the present invention;

[0041] Fig.11 The present invention is a schematic diagram of the connection structure between a rotating device and a driving body of a pipe expanding device for aircraft production.

[0042] In the figure: 1, operating table; 2, positioning mechanism; 21, bottom plate; 22, top plate; 23, positioning body; 231, vertical plate; 232, electric cylinder; 233, positioning clamping plate; 234, sleeve rod; 235, telescopic rod; 3, mounting plate; 4, slide groove; 5, expansion mechanism; 51, lifting plate; 52, transmission block; 53, rotating device; 531, rotating table; 532, mounting rod; 533, transmission gear; 534, driving motor; 535, driving gear; 536, slide rail; 54 , expanding device; 541, driving body; 5411, No. 2 forward and reverse motor; 5412, rotating rod; 5413, rotating plate; 5414, connecting ring; 5415, traction rod; 542, expansion body; 5421, moving plate; 5422, sliding sleeve; 5423, sleeve seat; 5424, electric heating rod; 5425, spline groove; 5426, spline seat; 5427, connecting rod; 55, supporting frame; 6, No. 1 forward and reverse motor; 7, transmission screw; 8, control panel; 9, pipe body. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0047] A pipe expansion device for aircraft production, such as Figure 1-2As shown, it includes an operating table 1, a positioning mechanism 2 is fixedly installed on the upper end of the operating table 1, a mounting plate 3 is fixedly installed on the rear part of the upper end of the operating table 1, a slide groove 4 is opened at the front end of the mounting plate 3, a flaring mechanism 5 is slidably connected in the slide groove 4, a No. 1 forward and reverse motor 6 is fixedly installed on the upper end of the mounting plate 3, a transmission screw 7 is fixedly installed on the output end of the No. 1 forward and reverse motor 6, the transmission screw 7 is movably connected in the slide groove 4 and is threadedly connected to the rear part of the flaring mechanism 5, and a control panel 8 is fixedly installed on the right end of the operating table 1.

[0048] like Figure 3-Figure 7 and Fig.11 As shown, the flaring mechanism 5 includes a lifting plate 51, a transmission block 52 is fixedly installed at the rear end of the lifting plate 51, the transmission block 52 is slidably connected in the slide groove 4 and is threadedly connected to the transmission screw 7, a rotating device 53 is movably installed at the lower end of the lifting plate 51, and a flaring device 54 is arranged at the lower end of the rotating device 53, and a support frame 55 is fixedly installed at one end of the lifting plate 51; the rotating device 53 includes a rotating table 531 and a driving motor 534, a mounting rod 532 is fixedly installed at the upper end of the rotating table 531, a transmission gear 533 is fixedly installed at the upper end of the mounting rod 532, and the driving motor 534 is fixedly installed. The flaring device 54 comprises a driving body 541, which is coaxially arranged with the rotating platform 531 and movably connected with the rotating platform 531 through a bearing, and four expansion bodies 542 are transmission-connected to the driving body 541; four slide rails 536 are fixedly installed at the lower end of the rotating platform 531, and the four slide rails 536 are arranged in a circular array, and the four expansion bodies 542 are transmission-connected to the driving body 541; 42 are respectively slidably connected with four slide rails 536; the driving body 541 includes a No. 2 forward and reverse motor 5411, which is fixedly installed on the upper end of the transmission gear 533, and a rotating rod 5412 is fixedly installed on the output end of the No. 2 forward and reverse motor 5411. The lower end of the rotating rod 5412 passes through the transmission gear 533, the mounting rod 532 and the rotating table 531 in sequence, and is fixedly installed with a rotating plate 5413. The rotating rod 5412 is movably connected with the rotating table 531 through a bearing, and the outer surface of the rotating plate 5413 is integrally formed with four connecting rings 5414, and the four connecting rings 5414 are The expansion body 542 includes a movable plate 5421, a sleeve 5422 is fixedly installed on the upper end of the movable plate 5421, the sleeve 5422 is slidably connected to the lower end of the rotating table 531 through a slide rail 536, a sleeve 5423 and a connecting rod 5427 are fixedly installed on the lower end of the movable plate 5421, and an electric heating rod 5424 is detachably installed in the sleeve 5423; two adjacent traction rods 5415 are respectively movably connected to the upper and lower sides of two adjacent connecting rings 5414, and the four traction rods 5415 are respectively movably connected to the four connecting rods 5427.

[0049] Through the above scheme: the output end of the first forward and reverse motor 6 drives the transmission screw 7 to rotate. When the transmission screw 7 rotates, the transmission block 52 threadedly connected thereto moves downward along the slide slot 4, thereby driving the flaring mechanism 5 to move downward as a whole, until the four electric heating rods 5424 on the flaring mechanism 5 extend into the opening of the pipe body 9, and the output end of the driving motor 534 drives the driving gear 535 to rotate through the rotating shaft, and the driving gear 535 is engaged with the transmission gear 533 to rotate the transmission gear 533, thereby driving the installation rod 532 and the rotating platform 531 to rotate together, and when the rotating platform 531 rotates When the rotating plate 5413 rotates, the expanding device 54 coaxially arranged therewith also rotates synchronously. At the same time, the output end of the second forward and reverse motor 5411 drives the rotating plate 5413 to rotate through the rotating rod 5412. When the rotating plate 5413 rotates, the four connecting rings 5414 thereon also rotate accordingly. The connecting ring 5414 pushes the connecting rod 5427 through the traction rod 5415. The connecting rod 5427 pushes the movable plate 5421 to move outward along the slide rail 536. The sleeve 5423 on the movable plate 5421 also moves outward accordingly, thereby expanding the opening of the pipe body 9 through the cooperation of the four electric heating rods 5424.

[0050] like Figure 8 As shown, a spline seat 5426 is integrally formed at the upper end of the electric heating rod 5424, and a spline groove 5425 matching the spline seat 5426 is formed at the lower end of the sleeve 5423. The spline seat 5426 is snap-fitted into the spline groove 5425 to fix the electric heating rod 5424 to the lower end of the sleeve 5423.

[0051] Through the above scheme: during the expansion process, the electric heating rod 5424 is used to locally heat the pipe body 9 to soften its material, thereby making the expansion operation easier, improving the quality of the expansion, reducing material damage, and extending the service life of the pipe body 9. At the same time, the electric heating rod 5424 can be quickly replaced through the spline seat 5426 and the spline groove 5425, reducing downtime and reducing maintenance costs.

[0052] like Figure 9-10As shown, the positioning mechanism 2 includes a bottom plate 21 and a top plate 22, the bottom plate 21 and the top plate 22 have the same structure and are coaxially arranged up and down, three positioning bodies 23 are fixedly installed between the bottom plate 21 and the top plate 22, and the three positioning bodies 23 are distributed in a ring array; the positioning body 23 includes a vertical plate 231 and a sleeve rod 234, the upper and lower ends of the vertical plate 231 are respectively fixedly connected to the top plate 22 and the bottom plate 21, an electric cylinder 232 is fixedly installed on the vertical plate 231, the output end of the electric cylinder 232 is fixedly connected to a positioning clamping plate 233, two sleeve rods 234 are provided and are both fixedly connected to the vertical plate 231, one end of the positioning clamping plate 233 is fixedly installed with two telescopic rods 235, and the two telescopic rods 235 are respectively slidably connected in the two sleeve rods 234; the positioning clamping plate 233 is made of rubber material, and the end surface of the positioning clamping plate 233 away from the telescopic rod 235 is a curved surface structure, and the axis of the positioning mechanism 2 coincides with the axis of the rotating table 531.

[0053] Through the above scheme: the three electric cylinders 232 in the positioning mechanism 2 are started through the control panel 8, and the electric cylinders 232 push the positioning clamps 233 to move outward until the three positioning clamps 233 are in contact with the inner surface of the pipe body 9 and tightly clamp the pipe body 9, ensuring that the pipe body 9 remains stable during the processing. In addition, the positioning clamps 233 are made of rubber material, and the end faces are arc-shaped structures, which can effectively prevent the pipe from being displaced or damaged during the processing.

[0054] During use, this embodiment specifically includes the following steps:

[0055] S1. Place the pipe body 9 on the upper end of the operating table 1, ensure that the pipe body 9 is sleeved on the outside of the positioning mechanism 2, and then start the three electric cylinders 232 in the positioning mechanism 2 through the control panel 8. The electric cylinders 232 push the positioning clamping plates 233 to move outward until the three positioning clamping plates 233 are in contact with the inner surface of the pipe body 9 and tightly clamp the pipe body 9, ensuring that the pipe body 9 remains stable during the processing;

[0056] S2, start the No. 1 forward and reverse motor 6 through the control panel 8, and drive the transmission screw 7 to rotate through the output end of the No. 1 forward and reverse motor 6. When the transmission screw 7 rotates, the transmission block 52 threadedly connected thereto moves downward along the slide slot 4, thereby driving the expansion mechanism 5 to move downward as a whole, until the four electric heating rods 5424 on the expansion mechanism 5 extend into the opening of the pipe body 9;

[0057] S3, start the driving motor 534 in the rotating device 53 through the control panel 8, the output end of the driving motor 534 drives the driving gear 535 to rotate through the rotating shaft, and the driving gear 535 is meshed with the transmission gear 533 to rotate the transmission gear 533, thereby driving the mounting rod 532 and the rotating platform 531 to rotate together. When the rotating platform 531 rotates, the expanding device 54 coaxially arranged therewith also rotates synchronously, so as to prepare for the subsequent expanding action;

[0058] S4, start the second forward and reverse motor 5411 in the expansion device 54 through the control panel 8, the output end of the second forward and reverse motor 5411 drives the rotating plate 5413 to rotate through the rotating rod 5412, when the rotating plate 5413 rotates, the four connecting rings 5414 thereon also rotate accordingly, the connecting ring 5414 pushes the connecting rod 5427 through the traction rod 5415, the connecting rod 5427 pushes the moving plate 5421 to move outward along the slide rail 536, and the sleeve 5423 on the moving plate 5421 also moves outward accordingly, so that the four electric heating rods 5424 cooperate with each other to realize the expansion of the opening of the pipe body 9;

[0059] S5. During the expansion process, the electric heating rod 5424 can be started through the control panel 8 to locally heat the pipe body 9 by using the electric heating rod 5424 to improve the expansion effect;

[0060] S6. After the expansion is completed, the expansion mechanism 5 is reset through the control panel 8, and the expansion effect is manually checked to ensure that the process requirements are met. Finally, the electric cylinder 232 is controlled to retract through the control panel 8, the positioning clamp 233 is released, and the expanded pipe body 9 is taken out from the operating table 1 for connection.

[0061] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pipe expansion device for aircraft production, comprising an operating table (1), characterized in that: A positioning mechanism (2) is fixedly mounted on the upper end of the operating table (1); a mounting plate (3) is fixedly mounted on the rear portion of the upper end of the operating table (1); a slide groove (4) is provided at the front end of the mounting plate (3); a flaring mechanism (5) is slidably connected in the slide groove (4); a first forward and reverse motor (6) is fixedly mounted on the upper end of the mounting plate (3); a transmission screw (7) is fixedly mounted on the output end of the first forward and reverse motor (6); the transmission screw (7) is movably connected in the slide groove (4) and is threadedly connected to the rear portion of the flaring mechanism (5); a control panel (8) is fixedly mounted on the right end of the operating table (1); The flaring mechanism (5) comprises a lifting plate (51), a transmission block (52) is fixedly mounted at the rear end of the lifting plate (51), the transmission block (52) is slidably connected in the slide groove (4) and is threadedly connected to the transmission screw (7), a rotating device (53) is movably mounted at the lower end of the lifting plate (51), a flaring device (54) is arranged at the lower end of the rotating device (53), and a support frame (55) is fixedly mounted at one end of the lifting plate (51); The rotating device (53) comprises a rotating platform (531) and a driving motor (534); a mounting rod (532) is fixedly mounted on the upper end of the rotating platform (531); a transmission gear (533) is fixedly mounted on the upper end of the mounting rod (532); the driving motor (534) is fixedly mounted in a supporting frame (55); a driving gear (535) is fixedly mounted on the output end of the driving motor (534) via a rotating shaft; and the driving gear (535) and the transmission gear (533) are located in the same plane and mesh with each other; The expanding device (54) comprises a driving body (541), the driving body (541) is coaxially arranged with the rotating platform (531), and the driving body (541) is movably connected to the rotating platform (531) via a bearing, and four expansion bodies (542) are drivingly connected to the driving body (541); Four slide rails (536) are fixedly mounted on the lower end of the rotating platform (531), and the four slide rails (536) are arranged in a ring array, and the four expansion bodies (542) are respectively slidably connected to the four slide rails (536); The driving body (541) comprises a second forward and reverse motor (5411), the second forward and reverse motor (5411) is fixedly mounted on the upper end of the transmission gear (533), a rotating rod (5412) is fixedly mounted on the output end of the second forward and reverse motor (5411), the lower end of the rotating rod (5412) passes through the transmission gear (533), the mounting rod (532) and the rotating platform (531) in sequence, and a rotating plate (5413) is fixedly mounted thereon, the rotating rod (5412) is movably connected to the rotating platform (531) via a bearing, and the outer surface of the rotating plate (5413) is integrally formed with four connecting rings (5414), and the four connecting rings (5414) are all movably connected to a traction rod (5415); The expansion body (542) comprises a movable plate (5421), a sliding sleeve (5422) being fixedly mounted on the upper end of the movable plate (5421), the sliding sleeve (5422) being slidably connected to the lower end of the rotating platform (531) via a sliding rail (536), a sleeve seat (5423) and a connecting rod (5427) being fixedly mounted on the lower end of the movable plate (5421), and an electric heating rod (5424) being detachably mounted in the sleeve seat (5423); Two adjacent traction rods (5415) are movably connected to the upper and lower sides of two adjacent connection rings (5414), respectively, and the four traction rods (5415) are movably connected to the four connection rods (5427), respectively.

2. The pipe expansion device for aircraft production according to claim 1, characterized in that: The upper end of the electric heating rod (5424) is integrally formed with a spline seat (5426), and the lower end of the sleeve (5423) is provided with a spline groove (5425) adapted to the spline seat (5426), and the spline seat (5426) is snap-fitted into the spline groove (5425) to fix the electric heating rod (5424) to the lower end of the sleeve (5423).

3. The pipe expansion device for aircraft production according to claim 1, characterized in that: The positioning mechanism (2) comprises a bottom plate (21) and a top plate (22); the bottom plate (21) and the top plate (22) have the same structure and are coaxially arranged up and down; three positioning bodies (23) are fixedly installed between the bottom plate (21) and the top plate (22); and the three positioning bodies (23) are distributed in a ring array.

4. The pipe expansion device for aircraft production according to claim 3, characterized in that: The positioning body (23) comprises a vertical plate (231) and a sleeve rod (234); the upper and lower ends of the vertical plate (231) are respectively fixedly connected to the top plate (22) and the bottom plate (21); an electric cylinder (232) is fixedly mounted on the vertical plate (231); the output end of the electric cylinder (232) is fixedly connected to a positioning clamping plate (233); two sleeve rods (234) are provided and are both fixedly connected to the vertical plate (231); two telescopic rods (235) are fixedly mounted on one end of the positioning clamping plate (233); the two telescopic rods (235) are respectively slidably connected in the two sleeve rods (234).

5. The pipe expansion device for aircraft production according to claim 4, characterized in that: The positioning clamp plate (233) is made of rubber material, and the end surface of the positioning clamp plate (233) away from the telescopic rod (235) is a curved surface structure, and the axis of the positioning mechanism (2) coincides with the axis of the rotating platform (531).

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