A round-up flaring device and method for aircraft tubing

Abstract

This invention discloses a device and method for flaring and rounding workpieces for aviation pipelines, comprising a tension clamping unit, a rotary sizing unit, a flaring clamping unit, and a flaring unit mounted on an operating platform. The tension clamping unit includes an axial screw drive platform, a radial screw drive platform, and a tension clamp. The rotary sizing unit includes a chuck mounting base, a pneumatic rotary chuck, and a sizing die. The flaring clamping unit includes a left- or right-handed screw drive platform and a flaring clamp. The flaring unit includes a screw drive platform and a flaring pin. This invention, by setting up the tension clamping unit, rotary sizing unit, flaring clamping unit, and flaring unit, coordinates the clamping, retraction, flaring, and rounding operations of the workpiece, achieving high accuracy and no deformation of the workpiece's outer diameter. Since the workpiece is not deformed, the connection is unaffected, resulting in better quality after connection. This invention has the advantages of being easy to use and producing pipelines with high accuracy and consistent quality in outer diameter.

Description

Technical Field

[0001] This invention relates to the field of pipeline processing technology, and in particular to a device and method for flaring out the end of aviation pipelines. Background Technology

[0002] Aviation piping components are mainly used in aircraft hydraulic, fuel, lubricating oil, and environmental control systems, serving to transmit media and deliver power. They are crucial components affecting aircraft safety and reliability. For hydraulic systems, under the same power conditions, higher operating pressure requires smaller actuator cylinders and oil pump piston bottom areas, resulting in lower pipeline flow rates. Consequently, the overall size and weight of the hydraulic system are reduced, and the lower medium flow rate also minimizes power loss within the pipeline.

[0003] Therefore, researching hydraulic systems with higher working pressures is an objective necessity for the development of the aviation industry.

[0004] Currently, the main operating pressures used in various domestic and international aircraft models for piping connections are 21, 28, and 35 MPa. Higher operating pressures significantly improve aircraft performance and optimize weight, but they also place higher demands on the design and testing of piping components. Flared connections are currently the most common connection method, but for the increasingly stringent requirements of low weight and long service life in aircraft, non-flared connections offer greater advantages. There are various non-flared connection methods. Generally, regardless of the method, the fittings are pre-processed according to certain standards. The fit clearance between the fitting and the conduit end is a crucial factor affecting the sealing performance and service life of the piping connection. This is especially true for beam-type sealing connections, external extrusion test connections, and shape memory alloy fittings, which are particularly sensitive to the outer diameter of the conduit.

[0005] However, in the actual production and processing, the tubing may deform to a certain extent during the process of cutting to a fixed length and chamfering the end of the tubing, which will cause the outer diameter to change. This will eventually affect the assembly of the connector, especially when connecting two tubing ends with different diameters. It is necessary to flare the smaller tubing end to match the outer diameter of the other end to ensure a reliable connection.

[0006] However, current traditional connection processes neglect the sizing and rounding of the ends of the two connecting conduits, or the flaring of the end that needs to be flared is performed on different equipment, resulting in inconsistent outer diameters of the two connected conduit ends, which affects the sealing performance. Summary of the Invention

[0007] The purpose of this invention is to provide a device and method for flaring out the outer diameter of aviation pipelines. This invention has the advantages of being easy to use and producing pipelines with high accuracy and consistent quality.

[0008] The technical solution of the present invention: A flaring device for aviation pipelines, comprising a tension clamp unit, a rotary sizing unit, a flaring clamp unit, and a flaring unit sequentially disposed on an operating platform; the tension clamp unit includes an axial screw drive platform, a radial screw drive platform, and a tension clamp; the rotary sizing unit includes a chuck mounting base, a pneumatic rotary chuck disposed on the chuck mounting base, and a sizing die detachably disposed in the pneumatic rotary chuck; the flaring clamp unit includes a left-right rotary screw drive platform and a flaring clamp; the flaring unit includes a screw drive platform and a flaring pin.

[0009] In the aforementioned circular flaring device for aviation pipelines, the tensioning clamp includes a fixed tensioning clamp and a movable tensioning clamp. The fixed tensioning clamp is mounted on the radial lead screw mounting platform via a fixed clamp mounting table. The movable tensioning clamp is connected to the radial lead screw nut seat via a movable clamp mounting table. The movable clamp mounting table is slidably mounted on the movable clamp slide rail located on the radial lead screw mounting platform. The radial lead screw mounting platform is mounted on the axial lead screw nut seat, and the axial lead screw drive platform drives the axial lead screw nut seat to move laterally.

[0010] In the aforementioned circular flaring device for aviation pipelines, both the fixed clamp mounting platform and the movable clamp mounting platform are detachable structures with multiple different height specifications.

[0011] In the aforementioned flaring device for aviation pipelines, a chuck mounting plate is provided on the front side of the chuck mounting base, and a chuck pulley is provided at the rear end of the chuck mounting base; the chuck pulley is connected to a speed-regulating motor via a belt; the pneumatic rotary chuck is provided with a limiting groove for engaging the sizing die and multiple rotary chuck meshing teeth; the sizing die is provided with a limiting ring and sizing die meshing teeth corresponding to the pneumatic rotary chuck on the outside.

[0012] In the aforementioned flaring device for aviation pipelines, the sizing mold consists of, from right to left, an entry guide section, an entry variable diameter section, a sizing section, an exit variable diameter section, and an exit guide section.

[0013] In the aforementioned flaring device for aviation pipelines, the core of the sizing die is made of hard alloy material, and the size of the sizing die core corresponds to the size of the pipeline, with multiple different sizes.

[0014] In the aforementioned flaring device for aviation pipelines, the flaring fixture includes two corresponding flaring fixture blocks. One of the flaring fixture blocks has a limiting block on the side near the flaring unit, and the limiting block has a through hole for the flaring needle to pass through. The flaring fixture block is mounted on a rotating nut seat via a flaring fixture mounting platform. The left-right turning screw transmission platform includes a bidirectional screw passing through the rotating nut seat and a rotary motor that drives the bidirectional screw to rotate. The bidirectional screw has a thread that is mirror-symmetrical along the middle. The flaring fixture mounting platform is slidably mounted on a flaring fixture slide rail via a flaring fixture slider.

[0015] In the aforementioned flaring device for aviation pipelines, the lead screw drive platform is mounted on a lead screw mounting base, and the lead screw mounting base is provided with a pair of lead screw slide rails; the flaring needle is mounted on a flaring needle mounting base, the flaring needle mounting base is located on the flaring mounting platform, and lead screw sliders are provided below both ends of the flaring mounting platform; the lead screw sliders are correspondingly slidably mounted on the lead screw slide rails; the lead screw drive platform drives the flaring mounting platform to move laterally.

[0016] In the aforementioned flaring device for aviation pipelines, the lead screw drive platform includes a horizontally arranged lead screw motor base, a lead screw passing through the lead screw motor base, and a lead screw stepper motor located outside the lead screw motor base to drive the lead screw to rotate; the lead screw stepper motor is connected to the lead screw via a lead screw coupling; a lead screw nut seat is located at the upper center of the lead screw mounting base and below the flaring mounting platform, and a lead screw bearing seat corresponding to the lead screw nut seat is located behind the lead screw mounting base; the lead screw passes through the lead screw nut seat and the lead screw bearing seat.

[0017] A method for flaring a full circle for aviation pipelines includes the following steps:

[0018] S1. Clamp the workpiece and place it into the tension fixture unit;

[0019] S2. Feed the workpiece into the rotary sizing unit until it reaches the limit block;

[0020] S3. The flared fixture closes and clamps the workpiece.

[0021] S4. The flaring unit is activated, and the flaring is performed on the workpiece.

[0022] S5. After flaring is completed, the flaring unit is removed and the flaring fixture is opened;

[0023] S6. The workpiece exits the rotary sizing unit, and the tensioning fixture unit opens;

[0024] S7. Complete the round flaring operation and remove the workpiece.

[0025] Compared with the prior art, the present invention, by sequentially setting up a stretching fixture unit, a rotary sizing unit, a flaring fixture unit, and a flaring unit on the operating platform, allows each unit to cooperate with each other to complete the workpiece clamping, advancing and retreating, flaring, and rounding operations. It can perform flaring, rounding, or flaring and rounding operations on the workpiece, ensuring that the final workpiece has high outer diameter accuracy and no deformation. When the outer diameter of the workpiece is not deformed, its docking will not be affected, and the quality of the docked pipeline is relatively better.

[0026] This device can be used to complete the flaring and rounding of pipeline workpieces without special operation. Simply change the fixtures (flaring fixtures, stretching fixtures, etc.) according to the actual processing to automatically complete the flaring and rounding of the workpieces. It is simple and convenient to use.

[0027] Therefore, the present invention has the advantages of being easy to use and producing pipes with high outer diameter accuracy and consistent quality. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the structure of the tension clamp unit of the present invention;

[0031] Figure 4 This is a schematic diagram a of the rotating sizing unit of the present invention;

[0032] Figure 5 This is a schematic diagram (b) of the rotating sizing unit of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the pneumatic rotary chuck of the present invention;

[0034] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0035] Figure 8 This is a schematic diagram of the sizing die of the present invention;

[0036] Figure 9 This is a cross-sectional view of the sizing die of the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of the flaring fixture unit of the present invention;

[0038] Figure 11 This is a schematic diagram of the structure of the flared unit of the present invention;

[0039] Figure 12This is a top view of the flared unit of the present invention.

[0040] The labels in the attached diagram are as follows: 1-Tension clamp unit, 11-Radial screw mounting platform, 12-Radial screw drive platform, 13-Tension fixed clamp, 131-Fixed clamp mounting table, 14-Tension moving clamp, 141-Moving clamp mounting table, 15-Axial screw drive platform, 2-Rotary sizing unit, 21-Chuck mounting seat, 22-Chuck mounting plate, 23-Pneumatic rotary chuck, 231-Limiting groove, 232-Rotary chuck meshing teeth, 24-Chuck pulley, 25-Belt, 3-Flanging clamp unit, 31-Flanging clamp mounting platform, 32-Limiting block, 33-Left and right turn screw drive Platform, 34-flaring fixture, 4-flaring unit, 41-lead screw mounting base, 42-lead screw slide rail, 43-lead screw slider, 44-flaring mounting platform, 45-flaring pin mounting base, 46-flaring pin, 5-lead screw transmission platform, 51-lead screw stepper motor, 52-lead screw motor base, 53-lead screw coupling, 6-lead screw, 61-lead screw nut seat, 62-lead screw bearing seat, 7-sizing die, 71-limiting ring, 72-sizing die meshing teeth, 73-entry guide section, 74-entry variable diameter section, 75-sizing section, 76-exit variable diameter section, 77-exit guide section, 9-operating platform. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0042] Example. A full-circle flaring device for aviation pipelines, configured as follows: Figure 1 and 2 As shown, the system includes a tension clamp unit 1, a rotary sizing unit 2, a flaring clamp unit 3, and a flaring unit 4, which are sequentially mounted on the operating platform 9. The tension clamp unit 1 includes an axial screw drive platform 15, a radial screw drive platform 12, and a tension clamp. The rotary sizing unit 2 includes a chuck mounting base 21, a pneumatic rotary chuck 23 mounted on the chuck mounting base 21, and a sizing die 7 detachably mounted in the pneumatic rotary chuck 23. The flaring clamp unit 3 includes a left-right helical screw drive platform 33 and a flaring clamp 34. The flaring unit 4 includes a screw drive platform 5 and a flaring pin 46.

[0043] like Figure 3The tensioning fixture includes a fixed tensioning fixture 13 and a movable tensioning fixture 14. The fixed tensioning fixture 13 is mounted on the radial lead screw mounting platform 11 via a fixed fixture mounting table 131. The movable tensioning fixture 14 is connected to the radial lead screw nut seat via a movable fixture mounting table 141. The movable fixture mounting table 141 is slidably mounted on the movable fixture slide rail located on the radial lead screw mounting platform 11. The radial lead screw mounting platform 11 is mounted on the axial lead screw nut seat, and the axial lead screw transmission platform 15 drives the axial lead screw nut seat to move laterally.

[0044] The radial lead screw drive platform 12 drives the moving tension clamp 14 to move laterally, thereby opening and closing the tension clamp and clamping and releasing the workpiece; the axial lead screw drive platform 15 drives the radial lead screw mounting platform 11 to move, thereby moving the workpiece forward and backward in the sizing mold 7.

[0045] Both the fixed fixture mounting platform 131 and the movable fixture mounting platform 141 are detachable structures with multiple different height specifications. The fixed fixture mounting platform 131 and the movable fixture mounting platform 141 are used to install the corresponding tension fixed fixture 13 and tension movable fixture 14 respectively. The mounting holes are fixed, but the height can be selected as needed, which makes it easy to adjust the center height of the tension fixture and adapt to tension fixtures of different pipe diameters. In turn, tension fixtures of different pipe diameters can adapt to workpieces of different pipe diameters.

[0046] like Figure 4-7 The chuck mounting base 21 has a chuck mounting plate 22 on its front side and a chuck pulley 24 at its rear end. The pneumatic rotary chuck 23 is fixed to the chuck mounting base 21 via the chuck mounting plate 22. The chuck pulley 24 is connected to a speed-regulating motor via a belt 25. The speed-regulating motor drives the chuck pulley 24 to rotate, thereby driving the pneumatic rotary chuck 23 to rotate. The pneumatic rotary chuck 23 has a limiting groove 231 for engaging the sizing mold 7 and multiple rotary chuck meshing teeth 232 inside. The sizing mold 7 has a limiting ring 71 and sizing mold meshing teeth 72 corresponding to the pneumatic rotary chuck 23 on its outside.

[0047] When installing the sizing mold 7, the pneumatic rotary chuck 23 is released, and the sizing mold 7 is pushed in. Under the action of gravity, the limiting ring 71 will be locked into the limiting groove 231. Then, the sizing mold 7 is rotated so that the sizing mold meshing teeth 72 and the rotary chuck meshing teeth 232 are engaged. After air is supplied, the three-lobed chuck of the pneumatic rotary chuck 23 closes and clamps the sizing mold 7, completing the installation.

[0048] like Figure 8 and 9 The sizing mold 7 consists of, from right to left, an entry guide section 73, an entry variable diameter section 74, a sizing section 75, an exit variable diameter section 76, and an exit guide section 77.

[0049] The workpiece's diameter decreases and becomes round at point 74 when it enters the reducing section, which facilitates flaring and forming.

[0050] The outer diameter of the workpiece is fixed at 75° in the sizing section;

[0051] The workpiece narrows to a full circle at the 76-degree reduction section after exiting the reducing section, which facilitates subsequent workpiece pipeline connection.

[0052] The core of the sizing mold 7 is made of hard alloy material. The size of the core of the sizing mold 7 corresponds to the size of the pipeline and has multiple different sizes. The sizing mold 7 has the advantages of high wear resistance, good polishing performance, low adhesion and low coefficient of friction. Under working conditions with small deformation, it can be used for a long time without lubrication, realizing environmentally friendly and clean operation.

[0053] like Figure 10 The flaring fixture 34 includes two corresponding flaring fixture blocks, one of which has a limiting block 32 on the side near the flaring unit 4. The limiting block 32 has a through hole for the flaring needle 46 to pass through. The flaring fixture blocks are mounted on the rotating nut seat via the flaring fixture mounting platform 31. The left and right screw drive platform 33 includes a bidirectional screw passing through the rotating nut seat and a rotary motor that drives the bidirectional screw to rotate. The bidirectional screw has a thread that is mirror-symmetrical along the middle. The flaring fixture mounting platform 31 is slidably mounted on the flaring fixture slide rail via a flaring fixture slider.

[0054] When the rotary motor rotates forward (or reverses, depending on its interaction with the bidirectional lead screw), the two rotating nut seats move toward both ends of the bidirectional lead screw, driving the upper flaring fixture mounting platform 31 to move, thereby opening the flaring fixture 34.

[0055] When the rotary motor rotates in reverse (forward), the two rotating nut seats move toward the center of the bidirectional lead screw, thereby closing the flared clamp 34 and clamping the workpiece.

[0056] This design effectively solves the problem of workpiece ejection after flaring due to interference from the flaring fixture 34.

[0057] When the flaring fixture 34 is open, the limiting block 32 can limit the workpiece. When the flaring fixture 34 is closed, the through hole of the limiting block 32 is coaxial with the workpiece and can stabilize and guide the flaring needle 46.

[0058] The same flaring clamp mounting platform 31 is similar to the fixed clamp mounting platform 131 and the moving clamp mounting platform 141. The mounting holes are fixed, but the height is not fixed, which makes it easy to adjust the center height of the flaring clamp 34 and adapt to flaring clamps 34 with different pipe diameters.

[0059] like Figure 11 and 12The lead screw drive platform 5 is mounted on the lead screw mounting base 41, and the lead screw mounting base 41 is provided with a pair of lead screw slide rails 42; the flaring needle 46 is mounted on the flaring needle mounting base 45, the flaring needle mounting base 45 is located on the flaring mounting platform 44, and lead screw sliders 43 are provided below both ends of the flaring mounting platform 44; the lead screw sliders 43 are correspondingly slidably mounted on the lead screw slide rails 42; the lead screw drive platform 5 drives the flaring mounting platform 44 to move laterally.

[0060] The lead screw transmission platform 5 includes a horizontally arranged lead screw motor base 52, a lead screw 6 passing through the lead screw motor base 52, and a lead screw stepper motor 51 located outside the lead screw motor base 52 to drive the lead screw 6 to rotate; the lead screw stepper motor 51 is connected to the lead screw 6 through a lead screw coupling 53; a lead screw nut seat 61 is provided at the upper center of the lead screw mounting base 41 and located below the flared mounting platform 44, and a lead screw bearing seat 62 corresponding to the lead screw nut seat 61 is provided behind the lead screw mounting base 41; the lead screw 6 passes through the lead screw nut seat 61 and the lead screw bearing seat 62.

[0061] The flaring pin 46 works in conjunction with the flaring fixture 34 with a cup-shaped opening to complete the flaring operation. The outer diameter of the flared workpiece is slightly larger than the inner diameter of the sizing die 7. During the withdrawal process, the outer diameter of the workpiece is adjusted by the sizing die 7 to ensure the roundness of the workpiece after flaring.

[0062] A method for flaring a full circle for aviation pipelines includes the following steps:

[0063] S1. Clamp the workpiece and place it into the tension fixture unit 1;

[0064] S2. Feed the workpiece into the rotary sizing unit 2 until it reaches the limit block 32;

[0065] S3. The flared fixture closes and clamps the workpiece.

[0066] S4, the flaring unit 4 is activated, and the flaring needle 46 flares the workpiece;

[0067] S5. After flaring is completed, flaring unit 4 is removed and flaring fixture is opened;

[0068] S6. The workpiece exits the rotary sizing unit 2, and the tensioning fixture unit 1 opens;

[0069] S7. Complete the round flaring operation and remove the workpiece.

[0070] Working principle:

[0071] Perform full-circle flaring operation for connecting workpieces of different diameters:

[0072] The robotic arm grips the workpiece and places it into the stretching fixture 13. The radial screw motor of the radial screw drive platform 12 starts, driving the stretching fixture 14 to move and close, thus clamping the workpiece. The axial screw motor of the axial screw drive platform 15 starts, feeding the workpiece into the rotary sizing unit 2 until it reaches the limit block 32. The rotary motor in the rotary sizing unit 2 rotates, driving the sizing die 7 to rotate, thereby rounding the workpiece. The rotary motor drives the flaring fixture 34 to close and fix the workpiece. The screw stepper motor 51 starts, driving the flaring pin 46 to move, cooperating with the flaring fixture 34 to complete the flaring operation of the workpiece. After flaring, the flaring pin 46 retracts, the flaring fixture 34 opens, and the axial screw motor starts to remove the flared workpiece from the rotary sizing unit 2. The stretching fixture opens, and the robotic arm removes the processed workpiece.

[0073] Perform a rounding operation on workpieces of the same pipe diameter:

[0074] The robotic arm grips the workpiece and places it into the stretching fixture 13. The radial screw motor of the radial screw drive platform 12 starts, driving the stretching fixture 14 to move and close the stretching fixture, thus holding the workpiece. The axial screw motor of the axial screw drive platform 15 starts, sending the workpiece into the rotary sizing unit 2 until it reaches the limit block 32. The rotary motor in the rotary sizing unit 2 rotates, driving the sizing die 7 to rotate, thereby rounding the workpiece. After rounding, the axial screw motor starts to remove the workpiece from the rotary sizing unit 2. The stretching fixture opens, and the robotic arm removes the processed workpiece.

Claims

1. A rounder and flaring device for aircraft tubing, characterized by: The system includes a tension clamp unit (1), a rotary sizing unit (2), a flaring clamp unit (3), and a flaring unit (4) sequentially mounted on the operating platform (9). The tension clamp unit (1) includes an axial screw drive platform (15), a radial screw drive platform (12), and a tension clamp. The rotary sizing unit (2) includes a chuck mounting base (21), a pneumatic rotary chuck (23) mounted on the chuck mounting base (21), and a sizing die (7) detachably mounted in the pneumatic rotary chuck (23). The flaring clamp unit (3) includes a left-right rotary screw drive platform (33) and a flaring clamp (34). The flaring unit (4) includes a screw drive platform (5) and a flaring pin (46). The tensioning fixture includes a fixed tensioning fixture (13) and a movable tensioning fixture (14). The fixed tensioning fixture (13) is mounted on the radial lead screw mounting platform (11) via a fixed fixture mounting table (131). The movable tensioning fixture (14) is connected to the radial lead screw nut seat via a movable fixture mounting table (141). The movable fixture mounting table (141) is slidably mounted on the movable fixture slide rail located on the radial lead screw mounting platform (11). The radial lead screw mounting platform (11) is mounted on the axial lead screw nut seat. The axial lead screw transmission platform (15) drives the axial lead screw nut seat to move laterally. Both the fixed clamp mounting platform (131) and the movable clamp mounting platform (141) are detachable structures and have multiple different height specifications; The chuck mounting base (21) has a chuck mounting plate (22) on its front side and a chuck pulley (24) at its rear end. The chuck pulley (24) is connected to a speed-regulating motor via a belt (25). The pneumatic rotary chuck (23) has a limiting groove (231) for engaging the sizing die (7) and multiple rotary chuck meshing teeth (232). The sizing die (7) has a limiting ring (71) and sizing die meshing teeth (72) corresponding to the pneumatic rotary chuck (23). The sizing die (7) consists of, from right to left, the following sections: the guide section (73), the variable diameter section (74), the sizing section (75), the variable diameter section (76), and the guide section (77). The flaring fixture (34) includes two corresponding flaring fixture blocks. One of the flaring fixture blocks has a limiting block (32) on one side near the flaring unit (4). The limiting block (32) has a through hole for the flaring needle (46) to pass through. The flaring fixture block is mounted on the rotating nut seat via the flaring fixture mounting platform (31). The left and right screw drive platform (33) includes a bidirectional screw passing through the rotating nut seat and a rotary motor that drives the bidirectional screw to rotate. The bidirectional screw has a thread that is mirror-symmetrical along the middle. The flaring fixture mounting platform (31) is slidably mounted on the flaring fixture slide rail via the flaring fixture slider.

2. A rounder for aircraft tubing as defined in claim 1, wherein: The core of the sizing mold (7) is made of hard alloy material. The core size of the sizing mold (7) corresponds to the pipe size and has multiple different sizes.

3. A rounder for aircraft tubing as defined in claim 1, wherein: The lead screw drive platform (5) is mounted on the lead screw mounting seat (41), and the lead screw mounting seat (41) is provided with a pair of lead screw slide rails (42); the flaring needle (46) is mounted on the flaring needle mounting seat (45), the flaring needle mounting seat (45) is mounted on the flaring mounting platform (44), and the flaring mounting platform (44) is provided with lead screw sliders (43) at both ends below; the lead screw sliders (43) are correspondingly slidably mounted on the lead screw slide rails (42); the lead screw drive platform (5) drives the flaring mounting platform (44) to move laterally.

4. A rounding flaring device for aviation pipelines according to claim 3, characterized in that: The lead screw transmission platform (5) includes a horizontally arranged lead screw motor seat (52), a lead screw (6) passing through the lead screw motor seat (52), and a lead screw stepper motor (51) located outside the lead screw motor seat (52) to drive the lead screw (6) to rotate; the lead screw stepper motor (51) is connected to the lead screw (6) through a lead screw coupling (53); a lead screw nut seat (61) is provided in the middle of the upper part of the lead screw mounting base (41) and located below the flared mounting platform (44); a lead screw bearing seat (62) corresponding to the lead screw nut seat (61) is provided behind the lead screw mounting base (41); the lead screw (6) passes through the lead screw nut seat (61) and the lead screw bearing seat (62).

5. A method for flaring an aviation pipeline based on the flaring device for aviation pipelines according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Clamp the workpiece and place it into the tension fixture unit (1); S2. Feed the workpiece into the rotary sizing unit (2) until it reaches the limit block (32); S3. The flared fixture closes and clamps the workpiece. S4, the flaring unit (4) is started, and the flaring needle (46) flares the workpiece; S5. After the flaring is completed, the flaring unit (4) is removed and the flaring fixture is opened; S6. The workpiece exits the rotary sizing unit (2), and the stretching fixture unit (1) opens; S7. Complete the round flaring operation and remove the workpiece.

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