Multi-angle bending system and method for thin-walled pipes of an aircraft seat luggage rack

Abstract

The present application belongs to the technical field of production of aviation interior parts, and particularly relates to a multi-angle bending system and method for thin-walled pipes of an aviation seat luggage rack, which comprises a rack, a pipe pushing assembly, a pipe overturning assembly, a bending preheating assembly, a bending positioning wheel, a bending assembly and an inner support pushing assembly. The guide wire of the inner support pushing assembly cooperates with the inner support spring to support the inner wall of the pipe, and the bending preheating assembly uniformly preheats the pipe part to be bent. The method based on the system successively completes pipe clamping and inner support, preheating and pushing, bending, multi-angle repeated bending and assembly resetting. The present application can effectively avoid defects such as pipe flattening, wrinkling and cracking, realize multi-angle precise bending, ensure pipe quality and assembly precision, and meet the strict processing requirements of the aviation seat luggage rack.

Description

Technical Field

[0001] This invention belongs to the field of aviation interior parts manufacturing technology, specifically relating to a multi-angle bending system and method for thin-walled tubular materials for aviation seat luggage racks. Background Technology

[0002] In the aerospace field, overhead luggage racks, as a core component of passenger aircraft interiors, directly affect the overall lightweighting level, flight safety, and passenger experience. Their structural design and manufacturing precision are subject to stringent requirements. To accommodate the limited installation space in the aircraft cabin, meet the structural strength requirements for luggage load-bearing, and adhere to standardized aesthetics, the thin-walled tubing used in overhead luggage racks requires multi-angle bending. Strict control over bending quality is essential. This necessitates effectively avoiding forming defects such as flattening, internal wrinkling, external cracking, cross-sectional depressions, and springback that commonly occur during bending. Simultaneously, it is crucial to ensure the relative positional accuracy and dimensional tolerances of each bent component to guarantee smooth assembly and structural stability. This presents an extremely high challenge to the bending technology of thin-walled tubing.

[0003] Existing multi-angle bending systems for thin-walled tubing in aircraft seat overhead bins have several shortcomings. First, the tubing lacks stability under bending stress. The outer side is prone to thinning and cracking due to excessive tensile stress, while the inner side is prone to wrinkling due to compressive stress, severely affecting the appearance and structural strength of the tubing. Second, heating cannot be applied to the bending area during bending, resulting in poor plasticity and high deformation resistance at the bending point, making it susceptible to cracking during the bending process. Third, the inner wall of the tubing lacks support, making it prone to cross-sectional distortion and indentation due to the stress difference between the inner and outer sides during bending.

[0004] Therefore, developing a system and method with heating assistance and internal support functions that can achieve precise multi-angle bending, and solving the pain points of existing technologies, has become an urgent technical problem to be solved in the current field of aerospace interior parts processing. Summary of the Invention

[0005] The purpose of this invention is to overcome the aforementioned problems in the prior art and to provide a multi-angle bending system and method for thin-walled tubular materials used in aircraft seat luggage racks.

[0006] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: This invention provides a multi-angle bending system for thin-walled tubing in aircraft seat overhead bins, comprising a frame, a tubing pushing assembly, a tubing flipping assembly, a bending preheating assembly, bending positioning wheels, a bending assembly, and an inner support pushing assembly. The tubing pushing assembly, tubing flipping assembly, bending preheating assembly, and bending positioning wheels are sequentially installed above the worktable of the frame along the tubing conveying direction. A bending assembly is installed below the worktable of the frame at a position corresponding to the bending positioning wheels. An inner support pushing assembly is installed on the frame at a position corresponding to the rear of the tubing pushing assembly. The inner support pushing assembly includes a material box, a material box bracket, a guide wire, an inner support spring, a connector, a guide wire pushing mechanism, and a spring pushing mechanism. The material box is mounted on the frame via the material box bracket. The material box is equipped with a guide wire pushing mechanism for driving the guide wire to move and a spring pushing mechanism for driving the inner support spring to move. The guide wire is coaxially inserted inside the inner support spring. One end of the inner support spring is installed inside the material box, and the other end is connected to the outer end of the guide wire via the connector.

[0007] Furthermore, in the aforementioned multi-angle bending system for thin-walled tubing of the overhead luggage rack, the thin-walled tubing to be bent is a seamless aluminum tube, and the outer diameter of the inner support spring is in clearance fit with the inner diameter of the seamless aluminum tube, with the clearance amount controlled between 0.05-0.1mm.

[0008] Furthermore, in the aforementioned multi-angle bending system for thin-walled tubing of aviation seat luggage racks, the guide wire pushing mechanism includes a guide wire pushing motor, a gear box, a steering gear set, a drive shaft, and a winding disc. The guide wire pushing motor and the gear box are both installed on the outside of the material box. The output shaft of the guide wire pushing motor extends into the gear box and is connected to one end of the drive shaft via the steering gear set inside the gear box. The other end of the drive shaft extends into the material box, and a winding disc is fixedly sleeved on this end. The outer peripheral wall of the winding disc has a winding groove adapted to the guide wire, and the inner end of the guide wire is fixedly wound in the winding groove to achieve synchronous linkage between the guide wire and the winding disc.

[0009] Furthermore, in the aforementioned multi-angle bending system for thin-walled tubing of aviation seat luggage racks, the spring pushing mechanism includes a spring pushing box, a guide tube, a spring pushing motor, a drive gear, a support plate, a support shaft, a driven gear, a spring pushing belt drive component, and a pushing roller. The spring pushing box is installed at the outlet of the material box, and the guide tube communicates with the internal channel of the material box through the internal channel of the spring pushing box. The spring pushing motor and the support plate are both fixed to the outer wall of the spring pushing box, and the output shaft of the spring pushing motor is equipped with a drive gear. The support plate rotatably supports the support shaft, and the outer end of the support shaft is equipped with a driven gear that meshes with the drive gear. The output shaft of the spring pushing motor and the support shaft are respectively connected to the central shaft of the corresponding pushing roller through the spring pushing belt drive component. The two pushing rollers are assembled in parallel inside the spring pushing box, and their outer peripheral walls are provided with spiral spring pushing grooves with opposite rotation directions. The spring pushing grooves of the two pushing rollers together form a clamping and pushing structure adapted to the inner support spring.

[0010] Furthermore, in the aforementioned multi-angle bending system for thin-walled tubing of aviation seat luggage racks, the tubing pushing assembly includes a tubing pushing box, a tubing pushing motor, a tubing pushing belt drive, a drive shaft, a transmission gear, a driven shaft, and tubing clamping rollers. The tubing pushing box has a tubing conveying channel extending through both ends. The two sides of the tubing pushing box are symmetrically and integrally formed with arched sections, the interior of which communicates with the tubing conveying channel. The tubing pushing motor is fixed to the outside of the tubing pushing box, and its output shaft is connected to one end of the drive shaft via the tubing pushing belt drive. The drive shaft and driven shaft are arranged side-by-side and parallel, and both ends of the drive shaft and driven shaft are fixedly fitted with meshing transmission gears to achieve synchronous counter-rotation. Tubing clamping rollers are fixedly fitted to the outer sides of the shafts of both the drive shaft and driven shaft that extend into the arched sections. The outer peripheral wall of the tubing clamping rollers has an annular clamping surface adapted to the tubing to be bent, and the surface of the annular clamping surface has anti-slip textures.

[0011] Furthermore, in the aforementioned multi-angle bending system for thin-walled tubing of aircraft seat luggage racks, the tubing flipping assembly includes a lower seat, an upper seat, a vacuum pump, a tubing flipping motor, a suction ring, a suction tube, an adsorption sleeve, a driven bevel gear, and a driving bevel gear. The lower seat is fixed to the worktable of the frame, and the upper seat is detachably connected to the lower seat by bolts. The suction ring and adsorption sleeve are coaxially clamped and fixed between the two. The vacuum pump is fixed to the frame, and its suction port is connected to the side of the suction ring through the suction tube. The adsorption sleeve is coaxially sleeved on the outside of the tubing to be bent, with one end sliding against the suction tube and the other end coaxially fixed to the hollow driven bevel gear. The tubing flipping motor is fixed to the frame, and its output end is equipped with a driving bevel gear that meshes with the driven bevel gear. The suction ring has a first suction cavity that communicates with the suction tube in its wall, and the suction ring has an annular sealing groove on the outer periphery of the first suction cavity at its mating end face. The wall of the adsorption tube sleeve is provided with a second suction chamber corresponding to the first suction chamber. The inner wall of the adsorption tube sleeve is evenly provided with a plurality of negative pressure suction holes that penetrate into the second suction chamber. The mating end face of the adsorption tube sleeve is provided with a connecting hole and an annular sealing protrusion. The connecting hole can realize the connection between the opening end of the second suction chamber and the first suction chamber. The sealing protrusion is adapted to and engaged with the sealing groove.

[0012] Furthermore, in the aforementioned multi-angle bending system for thin-walled tubing of aircraft seat luggage racks, the bending preheating component includes a mounting base and a ceramic ring heater; the mounting base is fixed to the worktable of the frame, the ceramic ring heater is embedded inside the mounting base, and the inner hole of the ceramic ring heater is adapted to the outer diameter of the tubing to be bent, which can uniformly preheat the part of the tubing to be bent in the circumferential direction.

[0013] Furthermore, in the aforementioned multi-angle bending system for thin-walled tubing of aircraft seat luggage racks, the bending positioning wheels include two symmetrically arranged guide wheels, both of which are rotatably supported on the worktable of the frame, and a tube-passing area adapted to the tube to be bent is formed between them; the outer peripheral wall of the guide wheel is provided with an annular guide groove adapted to the outer diameter of the tube.

[0014] Furthermore, in the aforementioned multi-angle bending system for thin-walled tubing of aircraft seat overhead bins, the bending assembly includes a bending support plate, a bending drive motor, a bending belt transmission component, a rotating shaft, a first support plate, an adjusting push rod, a telescopic joint tube, a second support plate, an adjusting motor, a boss, a pressure rod, an electromagnetic clutch, and an arc-shaped pressure cover. The bending drive motor is fixed below the worktable of the frame via the bending support plate. The output shaft of the bending drive motor is connected to one end of the rotating shaft via the bending belt transmission component, and the rotating shaft rotates and supports the worktable of the frame. Below the platform; a first support plate is fixedly sleeved on the outer side of the rotating shaft. The first support plate is connected to a second support plate through an adjusting push rod and a telescopic joint tube. An adjusting motor and a boss are installed on the outer side of the second support plate. A pressure rod is inserted through the boss. The lower end of the pressure rod is connected to the output shaft of the adjusting motor through an electromagnetic clutch. The upper end of the pressure rod extends to the top of the machine frame worktable, and an arc-shaped pressure cover is installed at this end. The inner arc surface of the arc-shaped pressure cover is adapted to the outer diameter of the pipe to be bent, and the inner arc surface is provided with an anti-scratch pad.

[0015] This invention also provides a multi-angle bending method for thin-walled tubing of aircraft seat overhead bins, based on the aforementioned multi-angle bending system for thin-walled tubing of aircraft seat overhead bins, specifically including the following steps: S1. Pass one end of the pipe to be bent through the pipe conveying channel of the pipe pushing assembly, and then through the adsorption sleeve of the pipe flipping assembly, the ceramic ring heater of the bending preheating assembly, and the pipe-passing area of ​​the bending positioning wheels in sequence; at the same time, start the inner support pushing assembly, the guide wire pushing mechanism drives the guide wire to move, and the spring pushing mechanism drives the inner support spring to move synchronously, so that the inner support spring, together with the internal guide wire, is pushed into the interior of the seamless aluminum tube through the guide tube until the inner support spring completely covers the part of the pipe to be bent, thus completing the inner support of the part of the pipe to be bent. S2. Start the ceramic ring heater of the bending preheating component to preheat the seamless aluminum tube to be bent in a uniform circumferential direction; after preheating, start the tube pushing component, and through the reverse rotation of the two tube clamping rollers, accurately send the preheated part to be bent into the tube threading area of ​​the bending positioning rollers. S3. Start the bending component and perform the corresponding bending operation according to the designed bending angle; S4. Repeat step S2 to preheat the next section of the pipe to be bent; at the same time, start the pipe flipping motor to flip the pipe to the set rotation angle; start the bending assembly to bend the pipe again; repeat the above operation until all angles of the pipe are bent. S5. After the bending process is completed, start the inner support pushing component. The guide wire pushing mechanism drives the guide wire to retract in the opposite direction. The spring pushing mechanism simultaneously drives the inner support spring to retract in the opposite direction into the material box. Then, release the clamping of the pipe by the pipe pushing component and the pipe flipping component, remove the pipe that has completed the bending process, reset all components, and prepare for the next processing.

[0016] The beneficial effects of this invention are: 1. By incorporating an internal support pushing component, utilizing the cooperation of an internal support spring and guide wire, internal support is provided during pipe bending, effectively preventing defects such as cross-sectional distortion and dents caused by stress differences between the inner and outer sides of the pipe, thus ensuring the appearance quality and structural strength of the pipe. The outer diameter of the internal support spring is fitted with the inner diameter of the seamless aluminum pipe with a clearance control within a reasonable range, resulting in good internal support performance. The guide wire solves the problem of blockage at the front end of the internal support spring due to resistance; the guide wire guides the front end of the internal support spring to move synchronously, facilitating rapid pushing and retraction of the internal support spring.

[0017] 2. The bending preheating component uses a ceramic ring heater, which can uniformly preheat the circumferential part of the pipe to be bent, improving the plasticity of the bending point, reducing deformation resistance, effectively reducing the occurrence of pipe breakage defects during bending, and improving bending quality. The pipe pushing component can precisely control the pushing distance of the pipe, accurately sending the preheated part to be bent into the pipe-passing area of ​​the bending positioning wheel; the pipe flipping component can drive the pipe to flip to the set rotation angle, using adsorption on the outer surface of the pipe to achieve flipping, which can avoid deformation problems caused by squeezing and flipping; in conjunction with the bending component, it can be operated according to the designed bending angle to achieve multi-angle precise bending of the pipe, meeting the complex structural requirements of aviation seat luggage racks.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the entire invention; Figure 3 This is a schematic diagram of the pipe pushing assembly in this invention; Figure 4 This is a schematic diagram of the pipe fitting pushing component in this invention after omitting the pipe fitting pushing box; Figure 5 This is a schematic diagram of the pipe fitting flipping assembly in this invention; Figure 6 This is a schematic diagram of the pipe fitting flipping assembly in this invention after omitting the upper and lower seats; Figure 7 This is a schematic diagram of the assembly of the suction ring and the adsorption sleeve in this invention; Figure 8 This is a schematic diagram of the bending preheating component in this invention; Figure 9 This is a schematic diagram of the bending positioning wheel structure in this invention; Figure 10 This is a schematic diagram of the bending component in this invention; Figure 11 This is a schematic diagram of the internal support pushing component in this invention; Figure 12 This is a schematic diagram of the spring pushing mechanism in this invention; Figure 13 This is a front view schematic diagram of the internal support pushing component in this invention; Figure 14 This is a connection block diagram of the main components in this invention; In the attached diagram, the components represented by each number are as follows: 1-Rack; 2-Pipe push assembly, 201-Pipe push box, 202-Pipe conveying channel, 203-Archive, 204-Transmission gear, 205-Pipe push motor, 206-Pipe push belt drive, 207-Drive shaft, 208-Driven shaft, 209-Pipe clamping roller; 3-Pipe flipping assembly, 301-Lower seat, 302-Upper seat, 303-Vacuum pump, 304-Pipe flipping motor, 305-Suction ring, 305a-First suction chamber, 305b-Annular sealing groove, 306-Suction tube, 307-Adsorption tube sleeve, 307a-Second suction chamber, 307b-Negative pressure suction hole, 307c-Connecting hole, 307d-Annular sealing convex ring, 308-Driven bevel gear, 309-Driven bevel gear; 4-Bending preheating assembly, 401-Mounting base, 402-Ceramic ring heater; 5-Bending and positioning wheels; 6-Bending assembly, 601-Bending support plate, 602-Bending drive motor, 603-Bending belt drive component, 604-Rotating shaft, 605-First support plate, 606-Adjusting push rod, 607-Telescopic joint tube, 608-Second support plate, 609-Adjusting motor, 610-Protrusion seat, 611-Pressure rod, 612-Electromagnetic clutch, 613-Arc-shaped pressure cover; 7-Inner support pushing assembly, 701-Material box, 702-Material box bracket, 703-Guide wire, 704-Inner support spring, 705-Connector, 706-Guide wire pushing motor, 707-Gear box, 708-Wire winding disc, 709-Spring pushing box, 710-Guide tube, 711-Spring pushing motor, 712-Driving gear, 713-Support plate, 714-Support shaft, 715-Driven gear, 716-Spring pushing belt drive component, 717-Pushing roller; 8-Pipe fittings; 9-Controller. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-2 As shown, this embodiment provides a multi-angle bending system for thin-walled tubing in an aircraft seat overhead bin, including a frame 1, a tubing pushing assembly 2, a tubing flipping assembly 3, a bending preheating assembly 4, bending positioning wheels 5, a bending assembly 6, and an inner support pushing assembly 7. The tubing pushing assembly 2, the tubing flipping assembly 3, the bending preheating assembly 4, and the bending positioning wheels 5 are sequentially installed above the worktable of the frame 1 along the tubing conveying direction. The bending assembly 6 is installed below the worktable of the frame 1 at the position corresponding to the bending positioning wheels 5. The inner support pushing assembly 7 is installed on the frame 1 at the rear position corresponding to the tubing pushing assembly 2.

[0023] like Figures 3-4 As shown, the pipe pushing assembly 2 includes a pipe pushing box 201, a pipe pushing motor 205, a pipe pushing belt drive 206, a drive shaft 207, a transmission gear 204, a driven shaft 208, and a pipe clamping roller 209. The pipe pushing box 201 has a pipe conveying channel 202 extending through both ends. The two sides of the pipe pushing box 201 are symmetrically and integrally formed with arched portions 203, the interior of which communicates with the pipe conveying channel 202. The pipe pushing motor 205 is fixed to the outside of the pipe pushing box 201, and its output shaft passes through… The pipe pusher belt drive 206 is connected to one end of the drive shaft 207; the drive shaft 207 and the driven shaft 208 are arranged side by side and in parallel, and the ends of the drive shaft 207 and the driven shaft 208 are fixedly sleeved with mutually meshing transmission gears 204 to realize the opposite synchronous rotation of the two; the drive shaft 207 and the driven shaft 208 are both fixedly sleeved with pipe clamping rollers 209 on the outer side of the shaft body that extends into the arched part 203, and the outer peripheral wall of the pipe clamping roller 209 is provided with an annular clamping surface adapted to the pipe 8 to be bent, and the surface of the annular clamping surface is provided with anti-slip texture.

[0024] The working principle of the pipe fitting push component 2 is as follows: The pipe push motor 205 drives the drive shaft 207 to rotate through the pipe push belt transmission component 206. The drive shaft 207 and the driven shaft 208 achieve synchronous rotation in opposite directions through the transmission gear 204, which in turn causes the two pipe clamping rollers 209 to rotate in opposite directions. The pipe 8 is clamped and pushed by the annular clamping surface and anti-slip texture, so as to achieve precise transmission of the pipe 8 in the system.

[0025] like Figures 5-7As shown, the pipe tilting assembly 3 includes a lower seat 301, an upper seat 302, a vacuum pump 303, a pipe tilting motor 304, a suction ring 305, a suction tube 306, an adsorption tube sleeve 307, a driven bevel gear 308, and a driving bevel gear 309. The lower seat 301 is fixed to the worktable of the frame 1, and the upper seat 302 is detachably connected to the lower seat 301 by bolts. The suction ring 305 and the adsorption tube are coaxially clamped and fixed between the two. The vacuum pump 303 is fixed on the frame 1, and its suction port is connected to the side of the suction ring 305 through the suction pipe 306. The adsorption tube sleeve 307 is coaxially sleeved on the outside of the tube to be bent 8, one end of which slides against the suction pipe 306, and the other end is coaxially fixed to the hollow driven bevel gear 308. The tube flipping motor 304 is fixed on the frame 1, and its output end is equipped with a driving bevel gear 309 that meshes with the driven bevel gear 308.

[0026] The suction ring 305 has a first suction cavity 305a that communicates with the suction tube 306 on its wall. The mating end face of the suction ring 305 has an annular sealing groove 305b located around the first suction cavity 305a.

[0027] The wall of the adsorption sleeve 307 is provided with a second suction cavity 307a corresponding to the first suction cavity 305a. The inner wall of the adsorption sleeve 307 is evenly provided with a plurality of negative pressure suction holes 307b that penetrate into the second suction cavity 307a. The mating end face of the adsorption sleeve 307 is provided with a connecting hole 307c and an annular sealing protrusion 307d. The connecting hole 307c can realize the connection between the opening end of the second suction cavity 307a and the first suction cavity 305a. The annular sealing protrusion 307d is adapted to engage with the annular sealing groove 305b.

[0028] The working principle of the pipe fitting flipping assembly 3 is as follows: The vacuum pump 303 generates negative pressure in the first suction chamber 305a of the suction ring 305 through the suction pipe 306. The second suction chamber 307a of the adsorption sleeve 307 is connected to the first suction chamber 305a through the connecting hole 307c. The negative pressure suction hole 307b on the inner wall of the adsorption sleeve 307 can adsorb and fix the tube 8. The tube flipping motor 304 drives the adsorption sleeve 307 and the tube 8 to rotate through the meshing of the active bevel gear 309 and the driven bevel gear 308, thereby adjusting the angle of the tube 8.

[0029] like Figure 8As shown, the bending preheating assembly 4 includes a mounting base 401 and a ceramic ring heater 402. The mounting base 401 is fixed to the worktable of the frame 1, and the ceramic ring heater 402 is embedded inside the mounting base 401. The inner hole of the ceramic ring heater 402 is adapted to the outer diameter of the tube to be bent 8, enabling uniform circumferential preheating of the part of the tube to be bent. The heating temperature range of the ceramic ring heater 402 is set to 180℃-250℃. This temperature range matches the material characteristics of the seamless aluminum tubes used in aviation seat luggage racks, improving the plasticity of the part to be bent and avoiding defects such as cracks and wrinkles during bending, thus meeting the preheating requirements for bending thin-walled aluminum tubes. The annular guide groove on the outer circumferential wall of the bending positioning wheel 5 guides and positions the tube 8, ensuring accurate positioning of the tube 8 during the bending process and guaranteeing bending precision.

[0030] like Figure 9 As shown, the bending positioning wheel 5 includes two symmetrically arranged guide wheels. Both guide wheels are rotatably supported on the worktable of the frame 1, and a pipe-passing area adapted to the pipe fitting 8 to be bent is formed between them. The outer peripheral wall of the guide wheel is provided with an annular guide groove adapted to the outer diameter of the pipe fitting 8.

[0031] like Figure 10 As shown, the bending assembly 6 includes a bending support plate 601, a bending drive motor 602, a bending belt drive component 603, a rotating shaft 604, a first support plate 605, an adjusting push rod 606, a telescopic joint tube 607, a second support plate 608, an adjusting motor 609, a boss 610, a pressure rod 611, an electromagnetic clutch 612, and an arc-shaped pressure cover 613. The bending drive motor 602 is fixed to the underside of the worktable of the frame 1 via the bending support plate 601. The output shaft of the bending drive motor 602 is connected to one end of the rotating shaft 604 via the bending belt drive component 603. The rotating shaft 604 is rotatably supported under the worktable of the frame 1. A first support plate 605 is fixedly sleeved on the outer side of shaft 604. The first support plate 605 is connected to the second support plate 608 through adjusting push rod 606 and telescopic joint tube 607. An adjusting motor 609 and a boss 610 are installed on the outer side of the second support plate 608. A pressure rod 611 is inserted through the boss 610. The lower end of the pressure rod 611 is connected to the output shaft of the adjusting motor 609 through electromagnetic clutch 612. The upper end of the pressure rod 611 extends to the top of the worktable of the frame 1, and an arc-shaped pressure cover 613 is installed at this end. The inner arc surface of the arc-shaped pressure cover 613 is adapted to the outer diameter of the pipe 8 to be bent, and the inner arc surface is provided with an anti-scratch pad.

[0032] The working principle of the bending assembly 6 is as follows: the bending drive motor 602 drives the rotating shaft 604 to rotate through the bending belt transmission component 603. The first support plate 605 rotates with the rotating shaft 604. The position of the second support plate 608 can be adjusted by adjusting the push rod 606 and the telescopic joint tube 607. The adjusting motor 609 controls the position of the pressure rod 611 through the electromagnetic clutch 612. The arc-shaped pressure cover 613 performs bending operation on the tube 8 under the drive of the pressure rod 611 to achieve bending requirements at different angles.

[0033] like Figures 11-13 As shown, the inner support pushing assembly 7 includes a material box 701, a material box bracket 702, a guide wire 703, an inner support spring 704, a connector 705, a guide wire pushing mechanism, and a spring pushing mechanism. The material box 701 is mounted on the frame 1 via the material box bracket 702. The material box 701 is equipped with a guide wire pushing mechanism for driving the guide wire 703 to move and a spring pushing mechanism for driving the inner support spring 704 to move. The guide wire 703 is coaxially inserted inside the inner support spring 704. One end of the inner support spring 704 is installed inside the material box 701, and the other end is connected to the outer end of the guide wire 703 via the connector 705.

[0034] The tube to be bent, 8, is a seamless aluminum tube. The outer diameter of the inner support spring 704 is in clearance fit with the inner diameter of the seamless aluminum tube, and the clearance is controlled between 0.05-0.1mm.

[0035] The wire guide pushing mechanism includes a wire guide pushing motor 706, a gear box 707, a steering gear set, a drive shaft, and a winding disc 708. The wire guide pushing motor 706 and the gear box 707 are both installed on the outside of the material box 701. The output shaft of the wire guide pushing motor 706 extends into the gear box 707 and is connected to one end of the drive shaft through the steering gear set inside the gear box 707. The other end of the drive shaft passes through the material box 701, and the winding disc 708 is fixedly sleeved on this end. The outer peripheral wall of the winding disc 708 is provided with a winding groove that is adapted to the wire guide 703. The inner end of the wire guide 703 is fixedly wound in the winding groove to realize the synchronous linkage between the wire guide 703 and the winding disc 708.

[0036] The spring pushing mechanism includes a spring pushing box 709, a guide tube 710, a spring pushing motor 711, a drive gear 712, a support plate 713, a support shaft 714, a driven gear 715, a spring pushing belt drive component 716, and a pushing roller 717. The spring pushing box 709 is installed at the outlet of the material box 701, and the guide tube 710 communicates with the internal channel of the material box 701 through the internal channel of the spring pushing box 709. The spring pushing motor 711 and the support plate 713 are both fixed to the outer wall of the spring pushing box 709, and the output shaft of the spring pushing motor 711 is equipped with a drive gear. 712; The support plate 713 rotatably supports the support shaft 714, and the outer end of the support shaft 714 is equipped with a driven gear 715 that meshes with the driving gear 712; The output shaft of the spring push motor 711 and the support shaft 714 are respectively connected to the central shaft of the corresponding push roller 717 through the spring push belt transmission component 716; The two push rollers 717 are assembled in parallel inside the spring push box 709, and the outer peripheral walls of the two have spiral spring push grooves with opposite directions of rotation, and the spring push grooves of the two push rollers 717 together form a clamping and pushing structure that is compatible with the inner support spring 704.

[0037] The working principle of the built-in push component 7 is as follows: The wire guide pushing mechanism moves the wire guide 703 through the cooperation of the wire guide pushing motor 706, gear box 707, steering gear set, drive shaft and winding disc 708; the spring pushing mechanism moves the inner support spring 704 through the cooperation of the spring pushing motor 711, driving gear 712, driven gear 715, spring pushing belt drive component 716 and pushing roller 717. The two work together to push the inner support spring 704 and the wire guide 703 into the tube 8 and provide support. After bending, they are returned to the material box 701.

[0038] like Figure 14 As shown, it also includes a controller 9, which is connected to the pipe pushing assembly 2, the pipe flipping assembly 3, the bending preheating assembly 4, the bending assembly 6 and the inner support pushing assembly 7 respectively.

[0039] This embodiment also provides a multi-angle bending method for thin-walled tubular materials used in aircraft seat overhead bins, specifically including the following steps: S1. Pass one end of the seamless aluminum tube to be bent through the tube conveying channel 202 of the tube pushing assembly 2, and then through the adsorption tube sleeve 307 of the tube flipping assembly 3, the ceramic ring electric heater 402 of the bending preheating assembly 4, and the tube passing area of ​​the bending positioning wheel 5 in sequence.

[0040] At the same time, the inner support pushing component 7 is activated, and the guide wire pushing motor 706 of the guide wire pushing mechanism works. Its output shaft drives the steering gear set in the gear box 707 to rotate, thereby driving the transmission shaft and the winding disc 708 to rotate. Since the inner end of the guide wire 703 is fixedly wound in the winding groove of the winding disc 708, the movement of the guide wire 703 is realized.

[0041] The spring pusher motor 711 of the spring pusher mechanism operates, and its output shaft drives the drive gear 712 to rotate. The drive gear 712 drives the driven gear 715 and the support shaft 714 to rotate. The support shaft 714 and the output shaft of the spring pusher motor 711 drive the two pusher rollers 717 to rotate through the spring pusher belt transmission component 716. The spiral spring pusher grooves on the outer peripheral walls of the two pusher rollers 717 with opposite rotation directions form a clamping and pushing structure that matches the inner support spring 704. The inner support spring 704 is driven to move synchronously, so that the inner support spring 704, together with the internal guide wire 703, is pushed into the interior of the seamless aluminum tube through the guide tube 710 until the inner support spring 704 completely covers the part of the tube 8 to be bent, thus completing the inner support of the part of the tube 8 to be bent.

[0042] S2. Start the ceramic ring heater 402 of the bending preheating component 4. The inner hole of the ceramic ring heater 402 is adapted to the outer diameter of the pipe to be bent 8, which can uniformly preheat the part of the seamless aluminum pipe to be bent in the circumferential direction and improve the plasticity of the part of the pipe to be bent 8.

[0043] After preheating, the pipe pushing assembly 2 is activated. The output shaft of the pipe pushing motor 205 drives the drive shaft 207 to rotate via the pipe pushing belt transmission component 206. The drive shaft 207 meshes with the transmission gear 204 at the end of the driven shaft 208, achieving synchronous rotation in opposite directions. This, in turn, drives the two pipe clamping rollers 209 to rotate in opposite directions. The annular clamping surface on the outer circumference of the pipe clamping rollers 209 engages with the anti-slip texture to precisely feed the preheated part to be bent into the pipe-passing area of ​​the bending positioning rollers 5. The pushing distance after preheating is set to 30mm-50mm. This distance ensures that the preheated part of the pipe to be bent is quickly moved out of the ceramic annular heater 402 and into the bending station. The entire pushing process takes 2-3 seconds, effectively preventing the part of the pipe to be bent from cooling down due to prolonged exposure to air, and ensuring that the plasticity of the pipe is in optimal condition during the bending process.

[0044] S3. Start the bending assembly 6. The output shaft of the bending drive motor 602 drives the rotating shaft 604 to rotate through the bending belt transmission component 603. The first support plate 605 on the outside of the rotating shaft 604 rotates accordingly. The first support plate 605 is connected to the second support plate 608 through the adjusting push rod 606 and the telescopic joint tube 607. The adjusting motor 609 on the outside of the second support plate 608 can adjust the position of the pressure rod 611 as needed. The electromagnetic clutch 612 controls the transmission connection between the pressure rod 611 and the output shaft of the adjusting motor 609. The inner arc surface of the arc-shaped pressure cover 613 at the upper end of the pressure rod 611 is adapted to the outer diameter of the pipe 8 to be bent and is provided with an anti-scratch pad. According to the designed bending angle, the arc-shaped pressure cover 613 performs the bending operation on the pipe 8.

[0045] S4. Repeat step S2 to preheat the next section of pipe fitting 8 to be bent.

[0046] At the same time, the pipe fitting flipping motor 304 is started. The active bevel gear 309 at the output end of the pipe fitting flipping motor 304 drives the driven bevel gear 308 that meshes with it to rotate. The driven bevel gear 308 is coaxially fixed with the adsorption sleeve 307, thereby driving the pipe fitting 8 to flip to the set rotation angle.

[0047] Restart the bending assembly 6 and bend the pipe 8 again using the same method as the initial bending operation. Repeat the above operation until all angles of the pipe 8 have been bent.

[0048] S5. After the bending process is completed, start the inner support pushing component 7. The guide wire pushing motor 706 drives the guide wire 703 to retract in the opposite direction. The spring pushing motor 711 synchronously drives the inner support spring 704 to retract in the opposite direction to the inside of the material box 701.

[0049] Then, the clamping roller 209 of the pipe pushing assembly 2 and the suction sleeve 307 of the pipe flipping assembly 3 are released from the pipe 8, the pipe 8 that has completed the bending process is removed, all components are reset, and preparation is made for the next processing.

[0050] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-angle bending system for thin-walled tubing in aircraft seat overhead bins, characterized in that, The assembly includes a frame, a pipe pushing component, a pipe flipping component, a bending preheating component, a bending positioning roller, a bending component, and an inner support pushing component. The pipe pushing component, the pipe flipping component, the bending preheating component, and the bending positioning roller are sequentially installed above the worktable of the frame along the pipe conveying direction. The bending component is installed below the worktable of the frame at the position corresponding to the bending positioning roller. The inner support pushing component is installed on the frame at the rear position corresponding to the pipe pushing component. The inner support pushing assembly includes a material box, a material box bracket, a guide wire, an inner support spring, a connector, a guide wire pushing mechanism, and a spring pushing mechanism. The material box is mounted on the frame via the material box bracket. The material box is equipped with a guide wire pushing mechanism for driving the guide wire to move and a spring pushing mechanism for driving the inner support spring to move. The guide wire is coaxially inserted inside the inner support spring. One end of the inner support spring is installed inside the material box, and the other end is connected to the outer end of the guide wire via the connector.

2. The multi-angle bending system for thin-walled tubing of an aircraft seat luggage rack according to claim 1, characterized in that, The tube to be bent is a seamless aluminum tube, and the outer diameter of the inner support spring is in clearance fit with the inner diameter of the seamless aluminum tube, with the clearance controlled between 0.05-0.1mm.

3. The multi-angle bending system for thin-walled tubing of an aircraft seat overhead bin as described in claim 2, characterized in that, The wire guide pushing mechanism includes a wire guide pushing motor, a gear box, a steering gear set, a drive shaft, and a winding disc. The wire guide pushing motor and the gear box are both installed on the outside of the material box. The output shaft of the wire guide pushing motor extends into the gear box and is connected to one end of the drive shaft through the steering gear set inside the gear box. The other end of the drive shaft extends into the material box, and a winding disc is fixedly sleeved on this end. The outer peripheral wall of the winding disc has a winding groove adapted to the wire guide. The inner end of the wire guide is fixedly wound in the winding groove to achieve synchronous linkage between the wire guide and the winding disc.

4. The multi-angle bending system for thin-walled tubing of an aircraft seat luggage rack according to claim 3, characterized in that, The spring pushing mechanism includes a spring pushing box, a guide tube, a spring pushing motor, a drive gear, a support plate, a support shaft, a driven gear, a spring pushing belt drive component, and a pushing roller. The spring pushing box is installed at the discharge port of the material box, and the guide tube is connected to the internal channel of the material box through the internal channel of the spring pushing box. The spring pushing motor and the support plate are both fixed to the outer wall of the spring pushing box, and the output shaft of the spring pushing motor is equipped with a drive gear. The support plate rotatably supports the support shaft, and the outer end of the support shaft is equipped with a driven gear that meshes with the drive gear. The output shaft of the spring pushing motor and the support shaft are respectively connected to the central shaft of the corresponding pushing roller through the spring pushing belt drive component. The two pushing rollers are assembled in parallel inside the spring pushing box, and their outer peripheral walls are provided with spiral spring pushing grooves with opposite directions of rotation. The spring pushing grooves of the two pushing rollers together form a clamping and pushing structure that is adapted to the inner support spring.

5. The multi-angle bending system for thin-walled tubing of an aircraft seat luggage rack according to claim 4, characterized in that, The pipe pushing assembly includes a pipe pushing box, a pipe pushing motor, a pipe pushing belt drive, a drive shaft, a transmission gear, a driven shaft, and pipe clamping rollers. The pipe pushing box has a pipe conveying channel extending through both ends. The two sides of the pipe pushing box are symmetrically and integrally formed with arched sections, the interior of which communicates with the pipe conveying channel. The pipe pushing motor is fixed to the outside of the pipe pushing box, and its output shaft is connected to one end of the drive shaft via the pipe pushing belt drive. The drive shaft and driven shaft are arranged side-by-side and parallel, and both ends of the drive shaft and driven shaft are fixedly fitted with meshing transmission gears to achieve synchronous counter-rotation. Pipe clamping rollers are fixedly fitted to the outer sides of the shafts of both the drive shaft and driven shaft that extend into the arched sections. The outer peripheral wall of the pipe clamping rollers has an annular clamping surface adapted to the pipe to be bent, and the surface of the annular clamping surface has anti-slip textures.

6. The multi-angle bending system for thin-walled tubing of an aircraft seat luggage rack according to claim 5, characterized in that, The pipe-flipping assembly includes a lower seat, an upper seat, a vacuum pump, a pipe-flipping motor, a suction ring, a suction tube, an adsorption sleeve, a driven bevel gear, and a driving bevel gear. The lower seat is fixed to the worktable of the machine frame, and the upper seat is detachably connected to the lower seat by bolts. The suction ring and adsorption sleeve are coaxially clamped and fixed between the two. The vacuum pump is fixed to the machine frame, and its suction port is connected to the side of the suction ring through the suction tube. The adsorption sleeve is coaxially sleeved on the outside of the pipe to be bent, with one end sliding against the suction tube and the other end coaxially fixed to the hollow driven bevel gear. The pipe-flipping motor is fixed to the machine frame, and its output end is equipped with a driving bevel gear that meshes with the driven bevel gear. The suction ring has a first suction cavity that communicates with the suction tube in its wall, and the suction ring has an annular sealing groove on the outer periphery of the first suction cavity at its mating end face. The wall of the adsorption tube sleeve is provided with a second suction chamber corresponding to the first suction chamber. The inner wall of the adsorption tube sleeve is evenly provided with a plurality of negative pressure suction holes that penetrate into the second suction chamber. The mating end face of the adsorption tube sleeve is provided with a connecting hole and an annular sealing protrusion. The connecting hole can realize the connection between the opening end of the second suction chamber and the first suction chamber. The sealing protrusion is adapted to and engaged with the sealing groove.

7. A multi-angle bending system for thin-walled tubing of an aircraft seat overhead bin as described in claim 6, characterized in that, The bending preheating assembly includes a mounting base and a ceramic ring heater; the mounting base is fixed on the worktable of the machine frame, the ceramic ring heater is embedded inside the mounting base, and the inner hole of the ceramic ring heater is adapted to the outer diameter of the pipe to be bent, so as to uniformly preheat the part of the pipe to be bent in the circumference.

8. The multi-angle bending system for thin-walled tubing of an aircraft seat overhead luggage rack according to claim 7, characterized in that, The bending positioning wheels include two symmetrically arranged guide wheels, both of which are rotatably supported on the worktable of the machine frame, and a pipe-passing area adapted to the pipe to be bent is formed between them; the outer peripheral wall of the guide wheel is provided with an annular guide groove adapted to the outer diameter of the pipe.

9. A multi-angle bending system for thin-walled tubing of an aircraft seat overhead luggage rack according to claim 8, characterized in that, The bending assembly includes a bending support plate, a bending drive motor, a bending belt transmission component, a rotating shaft, a first support plate, an adjusting push rod, a telescopic joint tube, a second support plate, an adjusting motor, a boss, a pressure rod, an electromagnetic clutch, and an arc-shaped pressure cover. The bending drive motor is fixed below the worktable of the machine frame via the bending support plate. The output shaft of the bending drive motor is connected to one end of the rotating shaft via the bending belt transmission component, and the rotating shaft is rotatably supported below the worktable of the machine frame. The first support plate is fixedly sleeved on the outer side of the rotating shaft. The first support plate is connected to the second support plate via the adjusting push rod and the telescopic joint tube. An adjusting motor and a boss are installed on the outer side of the second support plate. A pressure rod passes through the boss. The lower end of the pressure rod is connected to the output shaft of the adjusting motor via the electromagnetic clutch. The upper end of the pressure rod extends above the worktable of the machine frame, and an arc-shaped pressure cover is installed at this end. The inner arc surface of the arc-shaped pressure cover is adapted to the outer diameter of the pipe to be bent, and the inner arc surface is provided with an anti-scratch pad.

10. A method for multi-angle bending of thin-walled tubing for aircraft seat overhead bins, implemented based on the multi-angle bending system for thin-walled tubing of aircraft seat overhead bins as described in claim 9, characterized in that... Specifically, the steps include the following: S1. Pass one end of the pipe to be bent through the pipe conveying channel of the pipe pushing assembly, and then through the adsorption sleeve of the pipe flipping assembly, the ceramic ring heater of the bending preheating assembly, and the pipe-passing area of ​​the bending positioning wheels in sequence; at the same time, start the inner support pushing assembly, the guide wire pushing mechanism drives the guide wire to move, and the spring pushing mechanism drives the inner support spring to move synchronously, so that the inner support spring, together with the internal guide wire, is pushed into the interior of the seamless aluminum tube through the guide tube until the inner support spring completely covers the part of the pipe to be bent, thus completing the inner support of the part of the pipe to be bent. S2. Start the ceramic ring heater of the bending preheating component to preheat the seamless aluminum tube to be bent in a uniform circumferential direction; after preheating, start the tube pushing component, and through the reverse rotation of the two tube clamping rollers, accurately send the preheated part to be bent into the tube threading area of ​​the bending positioning rollers. S3. Start the bending component and perform the corresponding bending operation according to the designed bending angle; S4. Repeat step S2 to preheat the next section of the pipe to be bent; at the same time, start the pipe flipping motor to flip the pipe to the set rotation angle; start the bending assembly to bend the pipe again; repeat the above operation until all angles of the pipe are bent. S5. After the bending process is completed, start the inner support pushing component. The guide wire pushing mechanism drives the guide wire to retract in the opposite direction. The spring pushing mechanism simultaneously drives the inner support spring to retract in the opposite direction into the material box. Then, release the clamping of the pipe by the pipe pushing component and the pipe flipping component, remove the pipe that has completed the bending process, reset all components, and prepare for the next processing.

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