A system for stretching and unwinding an aluminum honeycomb core

Abstract

The application discloses a kind of aluminum honeycomb core material tensile development system, including honeycomb aluminum core tensile machine, the honeycomb aluminum core tensile machine is provided with rack, fixed end tensile head, mobile end tensile head, tensile head moving motor, planetary reducer, tensile head moving synchronous belt, round guide rail and vacuum chuck, the fixed end tensile head is fixedly installed on rack, the round guide rail is set in the front end both sides of fixed end tensile head, the mobile end tensile head is installed on round guide rail and tensile head moving synchronous belt, the fixed end tensile head and mobile end tensile head are all provided with pin setting mechanism.The beneficial effects of the present application are that: it can realize the automatic production of aluminum honeycomb core material from stretching to setting, effectively inhibits the common shape rebound deformation in traditional process, thereby improving the finished product qualification rate of large-aperture aluminum honeycomb core material, reducing edge waste, significantly improving the utilization rate of raw materials.

Description

Technical Field

[0001] This invention relates to the field of honeycomb composite material preparation technology, specifically to an aluminum honeycomb core material stretching and unfolding system. Background Technology

[0002] Aluminum honeycomb core materials have been widely used in building curtain walls, aerospace structural components, and interior and load-bearing components of transportation vehicles due to their excellent specific strength, specific stiffness and lightweight properties.

[0003] Currently, the stretching and unfolding of aluminum honeycomb core materials mainly relies on manual operation. Operators fix both ends of the compressed honeycomb blank and apply tension manually or semi-automatically to gradually unfold it into a preset shape. However, the physical properties of the aluminum foil material itself and processing environment factors make this process extremely unstable, making it difficult to predict and control the internal stress distribution of the honeycomb core material during stretching.

[0004] Specifically, when producing large-aperture honeycomb core materials, if the internal stress is not completely overcome and rebalanced by external forces during the stretching process, the unfolded honeycomb structure will exhibit a significant spring-like rebound phenomenon, attempting to return to its original state before compression. This springback leads to severe loss of control over the final product shape, with common defects including: forming an "X" shape with normal dimensions at both ends but a contracted middle area; or a "C" shape with one edge straight and the other curved. These irregular deformations are highly random, with an extremely narrow process window, making them difficult to compensate for with fixed parameters. In production, typically only the relatively regular middle portion of each batch of honeycomb core material is used, while the irregularly shaped or irregularly shaped portions are discarded directly as waste. This handling method results in a serious waste of expensive aerospace-grade or architectural-grade aluminum foil materials, significantly increasing production costs and reducing raw material utilization.

[0005] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide an aluminum honeycomb core material stretching and unfolding system. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide an aluminum honeycomb core material stretching and unfolding system to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides an aluminum honeycomb core material stretching and unfolding system, including a honeycomb aluminum core stretching machine, wherein the honeycomb aluminum core stretching machine is provided with a frame, a fixed end stretching head, a moving end stretching head, a stretching head moving motor, a planetary reducer, a stretching head moving synchronous belt, a circular guide rail and a vacuum suction cup; The fixed end stretching head is fixedly installed on the frame. The circular guide rail is set on both sides of the front end of the fixed end stretching head. The moving end stretching head is installed on the circular guide rail and the stretching head moving synchronous belt. The stretching head moving motor is connected to the stretching head moving synchronous belt through a planetary reducer to drive the moving end stretching head to move along the circular guide rail. Both the fixed end stretching head and the moving end stretching head are equipped with a pin shaping mechanism. The pin shaping mechanism includes a pin clamping plate, a rectangular spring, a pin body, a stretching head bracket, a linear guide rail, a drive motor, a second plum blossom coupling, and a two-way lead screw. The linear guide rail is mounted on the tension head bracket. Multiple sets of the insert pin bodies are mounted on the linear guide rail and evenly distributed between two sets of insert pin clamping plates. The rectangular spring is set between two adjacent sets of insert pin clamping plates. The drive motor is connected to a bidirectional lead screw through a second plum blossom coupling. The bidirectional lead screw is connected to the two sets of insert pin clamping plates to drive the insert pin clamping plates to move in opposite directions or away from each other along the linear guide rail, thereby pushing the insert pin body to insert into the honeycomb aluminum core or applying lateral pressure to the insert pin body.

[0008] In one or more embodiments of the present invention, a material detection sensor is provided on one side of the fixed end stretching head, and the material detection sensor is used to detect the position of the honeycomb aluminum core blank.

[0009] In one or more embodiments of the present invention, the pin shaping mechanism further includes a through-beam photoelectric sensor and a sensor bracket. The through-beam photoelectric sensor is fixedly connected to both sides of the stretching head bracket through the sensor bracket. The through-beam photoelectric sensor is used to detect the position of the blank edge or the end of the pin body.

[0010] In one or more embodiments of the present invention, a first plum blossom coupling is fixedly connected between the output end of the stretching head moving motor and the planetary reducer, and one end of the planetary reducer is connected to the stretching head moving synchronous belt.

[0011] In one or more embodiments of the present invention, the rectangular spring is used to compensate for positional deviations when the pin body is inserted, and to subject each pin body to uniform pressure when the pin clamping plate further presses it.

[0012] The beneficial effects of this invention are: it enables automated production of aluminum honeycomb core materials from stretching to shaping, effectively suppresses the springback deformation commonly found in traditional processes, thereby improving the finished product qualification rate of large-diameter aluminum honeycomb core materials, reducing edge waste, and significantly improving the utilization rate of raw materials. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0014] Figure 1 This is a schematic diagram of the structure of an aluminum honeycomb core material stretching and unfolding system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the pin shaping mechanism of an aluminum honeycomb core material stretching and unfolding system according to an embodiment of the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Honeycomb aluminum core stretching machine; 2. Incoming material detection sensor; 3. Fixed end stretching head; 4. Stretching head moving synchronous belt; 5. Moving end stretching head; 6. Stretching head moving motor; 7. Planetary reducer; 8. First plum blossom coupling; 9. Frame; 10. Circular guide rail; 11. Pin clamping plate; 12. Rectangular spring; 13. Pin body; 14. Through-beam photoelectric sensor; 15. Sensor bracket; 16. Stretching head bracket; 17. Linear guide rail; 18. Drive motor; 19. Second plum blossom coupling; 20. Double-acting lead screw. Detailed Implementation

[0016] 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.

[0017] like Figure 1 and Figure 2 As shown, an aluminum honeycomb core material stretching and unfolding system according to one embodiment of the present invention includes a honeycomb aluminum core stretching machine 1. The honeycomb aluminum core stretching machine 1 is provided with a frame 9, a fixed end stretching head 3, a moving end stretching head 5, a stretching head moving motor 6, a stretching head moving synchronous belt 4, and vacuum suction cups (not shown in the figure) for adsorbing the two ends of the honeycomb aluminum core blank.

[0018] The fixed-end stretching head 3 is fixedly mounted on the frame 9. Circular guide rails 10 are provided on both sides of the front end of the fixed-end stretching head 3, extending horizontally to guide the linear movement of the moving-end stretching head 5. A stretching head moving timing belt 4 is located at the center of the front side of the fixed-end stretching head 3 and engages with the moving-end stretching head 5 for transmission. Specifically, the moving-end stretching head 5 is mounted on both the circular guide rails 10 and the stretching head moving timing belt 4, allowing it to slide along the circular guide rails 10 and move driven by the timing belt.

[0019] The stretching head moving motor 6 is fixedly mounted on the frame 9, and its output end is fixedly connected to a planetary reducer 7 via a first perforated coupling 8. One end of the planetary reducer 7 is connected to the stretching head moving synchronous belt 4. Through the speed reduction and torque increase effect of the planetary reducer 7, the stretching head moving motor 6 can control the rotation direction and speed of the stretching head moving synchronous belt 4, thereby smoothly pulling the moving end stretching head 5 to move along the circular guide rail 10.

[0020] A material receiving sensor 2 is installed on one side of the fixed-end stretching head 3 to detect whether the honeycomb aluminum core blank has reached the predetermined position inside the honeycomb aluminum core stretching machine 1. When the material receiving sensor 2 detects that the honeycomb aluminum core blank has arrived, the system starts the stretching head moving motor 6 to run forward, driving the stretching head moving synchronous belt 4 to rotate in a preset direction, pulling the moving end stretching head 5 to smoothly approach the fixed end stretching head 3 along the circular guide rail 10. When the moving end stretching head 5 moves to the position where it is in contact with the other edge of the honeycomb aluminum core blank, the vacuum suction cups on the fixed end stretching head 3 and the moving end stretching head 5 start synchronously, respectively sucking up the two ends of the honeycomb aluminum core blank.

[0021] Subsequently, the stretching head moving motor 6 starts in reverse, driving the stretching head moving synchronous belt 4 to rotate, pulling the moving end stretching head 5 along the circular guide rail 10 in a direction away from the fixed end stretching head 3. At this time, the fixed end stretching head 3 remains stationary, and the two stretching heads on both sides form a reverse pulling force, stretching the honeycomb aluminum core blank at a uniform speed. When the honeycomb aluminum core blank is stretched to the preset length, the stretching head moving motor 6 stops running, the moving end stretching head 5 remains in a fixed position on the circular guide rail 10, and the vacuum suction cups on both sides continue to adhere to both ends of the blank, keeping the blank in the stretched state, preparing for subsequent pin shaping.

[0022] To ensure reliable shaping of the honeycomb aluminum core after stretching, both the fixed-end stretching head 3 and the moving-end stretching head 5 are equipped with pin-setting mechanisms. The pin-setting mechanism includes a pin clamping plate 11, a rectangular spring 12, a pin body 13, a linear guide rail 17, a drive motor 18, a second plum blossom coupling 19, and a two-way lead screw 20.

[0023] Specifically, the bidirectional lead screw 20 is fixedly mounted on the tension head bracket 16, and the drive motor 18 is connected to the bidirectional lead screw 20 via a second perforated coupling 19. A linear guide rail 17 is mounted on the upper surface and front side of the tension head bracket 16, and two sets of pin clamping plates 11 are located on the left and right sides of the bidirectional lead screw 20 and are connected to it for transmission. When the drive motor 18 rotates in the forward or reverse direction, the bidirectional lead screw 20 drives the two sets of pin clamping plates 11 to move towards or away from each other along the linear guide rail 17.

[0024] Multiple sets of pin bodies 13 are mounted on linear guide rails 17 and evenly distributed between two sets of pin clamping plates 11. The front end of the pin body 13 is used to insert into the honeycomb holes of the honeycomb aluminum core. Rectangular springs 12 are disposed between adjacent sets of pin clamping plates 11, that is, a rectangular spring 12 is clamped between each pair of adjacent pin clamping plates 11. The rectangular springs 12 can both provide elastic guidance during pin insertion and evenly transmit pressure during subsequent clamping.

[0025] Sensor brackets 15 are fixedly installed on both sides of the stretching head bracket 16, and through-beam photoelectric sensors 14 are fixedly connected to the sensor brackets 15. The through-beam photoelectric sensors 14 are used to detect whether the edge of the blank is in place, and to detect whether the end of the pin body 13 has reached the preset position during the pin insertion process.

[0026] Once the honeycomb aluminum core blank is stretched to a preset length, the through-beam photoelectric sensor 14 first detects whether the edge of the blank is accurately positioned by emitting and receiving light. After confirming that it is in position, the drive motor 18 starts and runs in the forward direction, driving the bidirectional lead screw 20 to rotate, causing the two sets of pin clamping plates 11 to slowly move towards the center along the linear guide rail 17. During the movement, the pin clamping plates 11 push the pin bodies 13 located between them to move synchronously towards the blank until the front end of the pin body 13 is inserted into the honeycomb hole of the honeycomb aluminum core, thus initially fixing the stretched shape of the honeycomb aluminum core.

[0027] During the insertion of the pin body 13, the rectangular spring 12 between adjacent pin clamping plates 11 is slightly compressed as the pin body 13 moves. The elastic force of the rectangular spring 12 can compensate for the slight positional deviation caused by manufacturing errors or assembly gaps when the pin body 13 is inserted, ensuring that each pin can be accurately inserted into the corresponding honeycomb hole, effectively avoiding core damage or shaping failure caused by misalignment of the pin body 13.

[0028] Once the pin body 13 is inserted to the preset depth, the photoelectric sensor 14 detects that the end of the pin body 13 has reached the preset position, at which point the first stage of the pin shaping action is completed. The drive motor 18 continues to run forward, and the bidirectional lead screw 20 drives the two sets of pin clamping plates 11 to move further towards the center. At this time, since the pin body 13 has been inserted into the honeycomb hole, the pin clamping plate 11 no longer pushes the pin body 13 forward. Instead, the side of the pin clamping plate 11 is in contact with the end of the pin body 13, applying uniform lateral pressure to the pin body 13. As the pin clamping plate 11 continues to move, the rectangular spring 12 is further compressed, and the resulting reverse elastic force is evenly transmitted to each set of pin bodies 13, ensuring that the pressure on all pin bodies 13 is consistent, thus preventing damage to the honeycomb core due to excessive force on individual pins.

[0029] When the two sets of pin clamping plates 11 move to the preset distance, the drive motor 18 stops running, and the bidirectional lead screw 20 locks its position by relying on its self-locking characteristic (or in conjunction with the motor brake). At this time, the pin clamping plates 11 and the pin body 13 remain pressed together, so that the honeycomb aluminum core maintains its shaped structure even when the external tension is removed, which facilitates subsequent processing (such as gluing, curing, etc.).

[0030] In this embodiment, the rectangular spring 12 is a crucial technical means to ensure the quality of the pin shaping. On one hand, during the pin insertion stage, the elastic deformation of the rectangular spring 12 allows for slight axial relative movement between each pin body 13, thereby adaptively matching the actual position of the honeycomb holes and eliminating insertion deviations caused by mechanical clearances or blank deformation. On the other hand, during the clamping stage, the rectangular spring 12, as an elastic pressure transmission element, converts the displacement of the pin clamping plate 11 into a uniform spring force applied to each pin body 13, avoiding local overload or individual pins not being clamped properly due to rigid clamping. By rationally selecting the stiffness and initial compression of the rectangular spring 12, the clamping force of the pin body 13 on the honeycomb core sidewall can be precisely controlled, ensuring the shaping effect without damaging the aluminum foil material.

[0031] In use, the honeycomb aluminum core blank is placed into the predetermined area inside the honeycomb aluminum core stretching machine 1. At this time, the incoming material detection sensor 2 installed on one side of the fixed end stretching head 3 automatically detects whether the honeycomb aluminum core blank is in place. After the honeycomb aluminum core blank is in place, the system starts the stretching head moving motor 6 installed on the frame 9 to run forward. Its output end is connected to the planetary reducer 7 through the first plum blossom coupling 8, which drives the stretching head moving synchronous belt 4 to rotate, thereby pulling the moving end stretching head 5 to move smoothly along the circular guide rails 10 on both sides of the front end of the fixed end stretching head 3 towards the fixed end, until the moving end stretching head 5 is in contact with the other edge of the blank. At this time, the vacuum suction cups on both sides start synchronously and respectively suck up the two ends of the blank. The stretching head moving motor 6 starts in reverse, and the stretching head moving synchronous belt 4 rotates in reverse, pulling the moving end stretching head 5 along the circular guide rail 10 to move away from the fixed end stretching head 3, while the fixed end stretching head 3 remains stationary, thereby forming a reverse pulling force on the blank and stretching it at a uniform speed. When the blank is stretched to the preset length, the stretching head moving motor 6 stops running, the moving end stretching head 5 remains fixed on the circular guide rail 10, and the vacuum suction cup continues to adsorb, keeping the blank in the stretched state.

[0032] Entering the pin shaping stage: The photoelectric sensors 14, which are installed on both sides of the stretching head bracket 16 and fixed by the sensor bracket 15, first confirm that the edge of the blank is in place by emitting and receiving light. After confirmation, the drive motor 18 runs in the forward direction, and drives the bidirectional lead screw 20 to rotate through the second plum blossom coupling 19. This causes the two sets of pin clamping plates 11 to move slowly towards the center along the linear guide rails 17 installed on the upper surface and front side of the stretching head bracket 16. This pushes the multiple sets of pin bodies 13 located between the two sets of clamping plates to move towards the blank in a synchronous manner until the front end of the pin body 13 is inserted into the honeycomb hole of the honeycomb aluminum core. During this process, the rectangular springs 12 between adjacent pin clamping plates 11 are slightly compressed to compensate for positional deviations and ensure that each pin is accurately inserted into the corresponding honeycomb hole. When the photoelectric sensor 14 detects that the end of the pin body 13 has reached the preset depth, the drive motor 18 continues to run in the forward direction, causing the two sets of pin clamping plates 11 to move further towards the center. At this time, since the pin has been inserted into the honeycomb hole, the pin clamping plate 11 no longer pushes the pin forward, but instead applies uniform lateral pressure to the pin by adhering to the end of the pin on the side. The rectangular spring 12 is further compressed, and the reverse elastic force generated by it is evenly transmitted to each set of pin bodies 13, so that all pins are subjected to the same force. When the two sets of pin clamping plates 11 move to the preset distance, the drive motor 18 stops running, and the bidirectional lead screw 20 locks its position by relying on its self-locking characteristic. The pin clamping plate 11 and the pin body 13 remain in a pressed state, so that the honeycomb aluminum core maintains its shape structure under the condition of removing the external tension.

[0033] After the shaping is completed, the drive motor 18 can be started in reverse to loosen the pin clamping plate 11 and remove the pin body 13 from the honeycomb hole. After the vacuum suction cup releases the adsorption, the stretched and shaped honeycomb aluminum core is removed. Then, the stretching head moving motor 6 is started in reverse to reset the moving end stretching head 5, and the next work cycle can begin.

[0034] Obviously, the above-described embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A stretching and unfolding system for aluminum honeycomb core material, characterized in that, The honeycomb aluminum core stretching machine (1) is provided with a frame (9), a fixed end stretching head (3), a moving end stretching head (5), a stretching head moving motor (6), a planetary reducer (7), a stretching head moving synchronous belt (4), a circular guide rail (10) and a vacuum suction cup. The fixed end stretching head (3) is fixedly installed on the frame (9). The circular guide rail (10) is set on both sides of the front end of the fixed end stretching head (3). The moving end stretching head (5) is installed on the circular guide rail (10) and the stretching head moving synchronous belt (4). The stretching head moving motor (6) is connected to the stretching head moving synchronous belt (4) through the planetary reducer (7) to drive the moving end stretching head (5) to move along the circular guide rail (10). Both the fixed end stretching head (3) and the moving end stretching head (5) are provided with a pin shaping mechanism. The pin shaping mechanism includes a pin clamping plate (11), a rectangular spring (12), a pin body (13), a stretching head bracket (16), a linear guide rail (17), a drive motor (18), a second plum blossom coupling (19), and a two-way lead screw (20). The linear guide rail (17) is mounted on the tension head bracket (16). Multiple sets of the pin bodies (13) are mounted on the linear guide rail (17) and evenly distributed between the two sets of pin clamping plates (11). The rectangular spring (12) is set between two adjacent sets of pin clamping plates (11). The drive motor (18) is connected to the bidirectional lead screw (20) through the second plum blossom coupling (19). The bidirectional lead screw (20) is connected to the two sets of pin clamping plates (11) to drive the pin clamping plates (11) to move towards or away from each other along the linear guide rail (17), thereby pushing the pin body (13) to insert into the honeycomb aluminum core or applying lateral pressure to the pin body (13).

2. The aluminum honeycomb core material stretching and unfolding system as described in claim 1, characterized in that, A material detection sensor (2) is provided on one side of the fixed end stretching head (3), and the material detection sensor (2) is used to detect the position of the honeycomb aluminum core blank.

3. The aluminum honeycomb core material stretching and unfolding system as described in claim 1, characterized in that, The pin shaping mechanism also includes a through-beam photoelectric sensor (14) and a sensor bracket (15). The through-beam photoelectric sensor (14) is fixedly connected to both sides of the stretching head bracket (16) through the sensor bracket (15). The through-beam photoelectric sensor (14) is used to detect the position of the blank edge or the end of the pin body (13).

4. The aluminum honeycomb core material stretching and unfolding system as described in claim 1, characterized in that, The output end of the stretching head moving motor (6) is fixedly connected to the planetary reducer (7) by a first plum blossom coupling (8), and one end of the planetary reducer (7) is connected to the stretching head moving synchronous belt (4).

5. The aluminum honeycomb core material stretching and unfolding system as described in claim 1, characterized in that, The rectangular spring (12) is used to compensate for positional deviation when the pin body (13) is inserted, and to make each pin body (13) be subjected to uniform pressure when the pin clamping plate (11) is further pressed.

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