A honeycomb core splicing device and method

Abstract

The application relates to a honeycomb core splicing device and method, wherein the honeycomb core splicing device comprises a bottom plate, a cover plate, a positioning comb plate, a conductive comb plate and a roller; the honeycomb core is placed on the bottom plate in the vertical direction of the corrugated strip and is clamped between the cover plate and the bottom plate; the bottom plate is respectively provided with a plurality of long positioning grooves and a plurality of short positioning grooves at positions corresponding to both sides of the corrugated strip, at least two positioning comb plates and one conductive comb plate are installed in the long positioning grooves, and at least one positioning comb plate is installed in the short positioning grooves; the positioning comb plate and the conductive comb plate are inserted into corresponding honeycomb cells to support the honeycomb cells; the roller moves up and down to splice the honeycomb core. The application can solve the problems of low strength and step difference in the height of the honeycomb cell when point welding is used for splicing, and can improve the structural strength and shape precision of the honeycomb core.

Description

Technical Field

[0001] This application relates to the field of honeycomb core technology, and in particular to a honeycomb core splicing device and method. Background Technology

[0002] Honeycomb sandwich structures possess advantages such as light weight, high specific strength and stiffness, and vibration damping and energy absorption, making them widely used in aviation, aerospace, and rail transportation. Paper honeycomb cores and aluminum alloy honeycomb cores are typically fabricated using a stretching method. However, titanium alloys and other metal materials have lower plasticity compared to aluminum alloys, making stretching an unsuitable method. Therefore, a common approach is to first fabricate corrugated strips and then weld them layer by layer to create the honeycomb core. Currently, resistance spot welding is commonly used for welding honeycomb cores. However, for metal honeycomb cores with large heights (≥150mm) and large dimensions (length ≥500mm), the resistance spot welding method suffers from insufficient connection strength between the honeycomb corrugated strips. During spot welding, adjacent corrugated strips are prone to misalignment, resulting in height differences within the core cells and making the honeycomb core susceptible to twisting and deformation.

[0003] Therefore, the inventors have provided a honeycomb core welding device and method. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] This application provides a honeycomb core welding device and method. The technical problem to be solved is that the connection strength between the honeycomb corrugated strips is not strong enough when spot welding is used. Adjacent corrugated strips are prone to misalignment during spot welding, resulting in a step difference in core cell height and the honeycomb core is prone to twisting and deformation.

[0006] (2) Technical solution

[0007] In a first aspect, this application provides a honeycomb core welding device, including a base plate, a cover plate, positioning comb plates, conductive comb plates, and rollers; the honeycomb cores are placed on the base plate in the vertical direction of the corrugated strip and sandwiched between the cover plate and the base plate; the base plate is provided with a plurality of long positioning grooves and a plurality of short positioning grooves at positions corresponding to both sides of the corrugated strip, the long positioning grooves are equipped with at least two of the positioning comb plates and one of the conductive comb plates, and the short positioning grooves are equipped with at least one of the positioning comb plates; the positioning comb plates and the conductive comb plates are inserted into the corresponding honeycomb cells to support the honeycomb cells; the rollers move up and down to weld the honeycomb cores.

[0008] Furthermore, the bottom surface of the cover plate presses onto the honeycomb core.

[0009] Furthermore, the cover plate has multiple notches along one long side, and the positioning comb plate and the conductive comb plate installed in the long positioning groove are inserted into the honeycomb core along the notches.

[0010] Furthermore, the distance between the other long side of the cover plate and the notch is equal to the distance between the long positioning groove and the short positioning groove.

[0011] Furthermore, the distance between the long positioning slot and the short positioning slot is greater than the original total length of the corresponding honeycomb lattice between the long positioning slot and the short positioning slot.

[0012] Furthermore, the base plate is also provided with a plurality of empty tool slots, which are located at the end of the long positioning slot away from the short positioning slot.

[0013] Furthermore, the positioning comb plate includes multiple support bars, which are connected to each other by pads and screws; each support bar is inserted into a corresponding honeycomb cell.

[0014] Furthermore, the conductive comb plate includes multiple conductive strips, which are connected to each other by pads and screws; each conductive strip is inserted into a corresponding honeycomb cell.

[0015] Furthermore, the honeycomb core welding device also includes a wiring board, which is mounted on the conductive comb plate.

[0016] Secondly, this application provides a method for welding honeycomb cores, wherein the honeycomb cores are welded using the honeycomb core welding device described above.

[0017] (3) Beneficial effects

[0018] The above-mentioned technical solution of this application has the following advantages:

[0019] The honeycomb core welding apparatus and method provided in this application employs a roll welding process for welding the honeycomb core, which has a higher strength than spot welding. During the roll welding process, adjacent corrugated strips can fit tightly together, avoiding misalignment as in resistance spot welding. At least three positioning comb plates are used for support, improving the straightness of the core during welding. The honeycomb core is positioned using a base plate support and a cover plate clamping method, ensuring the positional accuracy of adjacent corrugated strips and reducing the torsional deformation of the honeycomb core. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram illustrating the layer-by-layer welding process for manufacturing a honeycomb core.

[0022] Figure 2 Schematic diagram of the resistance spot welding fixture for honeycomb core;

[0023] Figure 3 Schematic diagram of a high-height honeycomb core;

[0024] Figure 4 A perspective view of the honeycomb core welding device provided in this application;

[0025] Figure 5 The front view and top view of the honeycomb core welding device provided in this application;

[0026] Figure 6 A schematic diagram of the cover plate provided in this application;

[0027] Figure 7 A schematic diagram of the base plate provided in this application.

[0028] Reference numerals: 1. Base plate; 2. Cover plate; 3. Positioning comb plate; 4. Conductive comb plate; 5. Roller; 6. Honeycomb core; 7. Long positioning groove; 8. Short positioning groove; 9. Notch; 10. Hollow knife groove; 11. Wiring board. Detailed Implementation

[0029] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of this application with unnecessary detail.

[0030] It should be understood that, when used in this application specification and appended claims, the term "comprising" indicates the presence of the described feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. The terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, in the description of this application specification and appended claims, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0032] Metal honeycomb sandwich structures possess advantages such as light weight, high specific strength and stiffness, and vibration damping and energy absorption, making them widely used in aviation, aerospace, and rail transportation. Paper honeycomb cores and aluminum alloy honeycomb cores are typically prepared using a stretching method. The specific process involves coating a strip with spaced adhesive films, combining multiple strips, curing them, and then stretching the ends of the honeycomb core after curing. However, metal materials such as titanium alloys have lower plasticity than aluminum alloys and cannot be prepared using the stretching method. Therefore, a method is typically used to prepare the honeycomb core by first fabricating corrugated strips and then welding them layer by layer (e.g.,...). Figure 1 (As shown). For metal honeycomb core structures such as titanium alloys, there are... Figure 2 The spot welding fixture shown.

[0033] For metal honeycomb cores with large height (≥150mm) and large size (length ≥500mm) (such as...) Figure 3 As shown), the resistance spot welding method has the following problems: (1) the strength of the connection between the honeycomb foils is insufficient when resistance spot welding is used; (2) due to the high height of the foils, the distance of the resistance spot welding is large, and adjacent foils are prone to misalignment during the spot welding process, resulting in a step difference in the core cell height; (3) due to the high height of the foils, the resistance spot welding method has the following problems: (1) the strength of the connection between the honeycomb foils is insufficient when resistance spot welding is used; (2) due to the high height of the foils, the distance of the resistance spot welding is large, and adjacent foils are prone to misalignment during the spot welding process, resulting in a step difference in the core cell height; Figure 2When the single support bar shown is resistively spot welded to the middle part of the corrugated strip, the foil is prone to bending and deformation under the action of electrode pressure, resulting in misalignment of adjacent corrugated strips and a step difference in core cell height; (4) Due to the large size of the honeycomb core, there is a gap between the positioning mechanism and the height of the honeycomb core. During the welding process, the deformation will gradually accumulate, causing the honeycomb core to twist and deform.

[0034] To address the aforementioned problems, the purpose of this application is to provide a honeycomb core welding device and method that can solve the problems of low strength and stepped height of the core cells when using spot welding, thereby improving the structural strength and shape accuracy of the honeycomb core.

[0035] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0036] like Figure 4 and Figure 5 As shown, the honeycomb core welding device provided in this embodiment includes a base plate 1, a cover plate 2, a positioning comb plate 3, a conductive comb plate 4, and rollers 5. The honeycomb core 6 is placed on the base plate 1 in the vertical direction of the corrugated strip and sandwiched between the cover plate 2 and the base plate 1. The base plate 1 is provided with a plurality of long positioning grooves 7 and a plurality of short positioning grooves 8 at positions corresponding to both sides of the corrugated strip. At least two positioning comb plates 3 and one conductive comb plate 4 are installed in the long positioning grooves 7, and at least one positioning comb plate 3 is installed in the short positioning grooves 8. The positioning comb plates 3 and the conductive comb plates 4 are inserted into the corresponding honeycomb core cells to support the honeycomb core cells. The rollers 5 move up and down to weld the honeycomb core 6.

[0037] In some embodiments, the bottom surface of the cover plate 2 presses against the honeycomb core 6.

[0038] In some embodiments, the cover plate 2 has a plurality of notches 9 on one long side, and the positioning comb plate 3 and the conductive comb plate 4 installed in the long positioning groove 7 are inserted into the honeycomb core along the notches 9.

[0039] In some embodiments, the distance between the other long side of the cover plate 2 and the notch 9 is equal to the distance between the long positioning groove 7 and the short positioning groove 8.

[0040] In some embodiments, the distance between the long positioning slot 7 and the short positioning slot 8 is greater than the original total length of the corresponding honeycomb lattice between the long positioning slot 7 and the short positioning slot 8.

[0041] In some embodiments, the base plate 1 is further provided with a plurality of empty tool grooves 10, the empty tool grooves 10 being located at the end of the long positioning groove 7 away from the short positioning groove 8.

[0042] In some embodiments, the positioning comb plate 3 includes multiple support bars, which are connected to each other by pads and screws; each support bar is inserted into a corresponding honeycomb cell.

[0043] In some embodiments, the conductive comb plate 4 includes multiple conductive strips, which are connected to each other by pads and screws; each conductive strip is inserted into a corresponding honeycomb cell.

[0044] In some embodiments, the honeycomb core welding device further includes a wiring board 11, which is mounted on the conductive comb plate 4.

[0045] In applications, the size of the honeycomb core is typically a few millimeters to over ten millimeters. Supports need to pass through the core cells, so the rigidity of a single support strip is clearly insufficient; the number of support strips needs to be increased, with at least three support strips required to meet the roll welding requirements. The honeycomb core needs to be positioned both above and below. If the positioning mechanism is not adjustable, there will inevitably be a gap between the honeycomb core and the positioning mechanism. This application selects a scheme that utilizes gravity for positioning the honeycomb core in the height direction. The honeycomb core cells need to be accurately positioned, requiring certain measures to ensure they are in the correct position. Inserting support strips into the honeycomb core cells and then stretching the honeycomb core to a certain extent can achieve accurate positioning of the honeycomb core cells.

[0046] In summary, this application provides a honeycomb core welding device. The honeycomb core 6 is placed vertically along the corrugated strip and sandwiched between the base plate 1 and the cover plate 2. The top and bottom of the honeycomb core 6 are reliably positioned by the pressure of the cover plate 2. Two types of positioning grooves are machined in the base plate 1: at least two positioning comb plates 3 and one conductive comb plate 4 are inserted into the long positioning groove 7, and at least one positioning comb plate 3 is inserted into the short positioning groove 8. The support of at least three comb plates improves the straightness of the honeycomb core during roll welding. The distance between the short positioning groove 8 and the long positioning groove 7 is slightly greater than the original total length of the corresponding core cells within the honeycomb core 6, providing a stretching effect on the honeycomb core 6. Under the elastic action of the honeycomb core 6, the core cells of the honeycomb core 6 are accurately positioned. Rollers 5 move up and down to weld the honeycomb core 6. A wiring plate 11 is installed on the conductive comb plate 4 to conduct electricity to the conductive comb plate 4. The roller 5 can be installed on a robotic arm or robot. By controlling the movement of the robotic arm or robot through a program, the roller 5 and the conductive comb plate 4 work together to complete the welding of the honeycomb core 6.

[0047] Cover plate 2 Figure 6 As shown, to avoid the positioning comb plate 3 and the conductive comb plate 4, the cover plate 2 is designed with many notches 9. The bottom surface of the cover plate 2 presses against the honeycomb core 6. The distance between the long side of the cover plate 2 and the notches 9 is equal to the distance between the long positioning groove 7 and the short positioning groove 8. The base plate 1 is as follows: Figure 7 As shown, to avoid the roller 5, the base plate 1 is designed with many hollow grooves 10. The upper part of the base plate 1 supports the honeycomb core 6. The positioning comb plate 3 is assembled from many steel support strips and steel pads by a long screw. The conductive comb plate 4 is assembled from many copper strips and copper pads by a long screw. To improve the service life of the roller 5, the material of the roller 5 can be selected as chromium zirconium copper.

[0048] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application.

[0049] This embodiment also provides a method for welding honeycomb cores, wherein the honeycomb cores are welded using the honeycomb core welding device described above.

[0050] The honeycomb core welding apparatus and method provided in this application improve the straightness of the honeycomb lattice during roll welding by using at least three positioning comb plates and one conductive comb plate to support the corrugated strip, thus ensuring the welding accuracy of high-height honeycomb cores. Positioning the corrugated strip using a base plate support and cover plate clamping method achieves gapless positioning of the honeycomb core in the height direction. A certain amount of stretching of the honeycomb lattice by the base plate, cover plate, and positioning comb plates ensures accurate positioning of the parts to be welded. The roll welding process for welding the honeycomb cores results in superior strength compared to spot welding. During roll welding, adjacent corrugated strips can fit tightly together, avoiding misalignment as in resistance spot welding. This application solves the problems of insufficient connection strength, stepped lattice height, and easy distortion and deformation of the honeycomb core in the spot welding method.

[0051] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0052] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A honeycomb core welding device, characterized in that, The system includes a base plate, a cover plate, positioning comb plates, conductive comb plates, and rollers. The honeycomb core is placed on the base plate in the vertical direction of the corrugated strip and sandwiched between the cover plate and the base plate. The base plate has multiple long positioning slots and multiple short positioning slots at positions corresponding to both sides of the corrugated strip. At least two positioning comb plates and one conductive comb plate are installed in the long positioning slots, and at least one positioning comb plate is installed in each short positioning slot. Both the positioning comb plates and the conductive comb plates are inserted into their corresponding honeycomb cells to support them. The rollers move up and down to weld the honeycomb cores together.

2. The honeycomb core welding device as described in claim 1, characterized in that, The bottom surface of the cover plate presses onto the honeycomb core.

3. The honeycomb core welding device as described in claim 1, characterized in that, The cover plate has multiple notches along one long side, and the positioning comb plate and the conductive comb plate installed in the long positioning groove are inserted into the honeycomb core along the notches.

4. The honeycomb core welding device as described in claim 3, characterized in that, The distance between the other long side of the cover plate and the notch is equal to the distance between the long positioning groove and the short positioning groove.

5. The honeycomb core welding device as described in claim 1, characterized in that, The distance between the long positioning slot and the short positioning slot is greater than the original total length of the corresponding honeycomb lattice between the long positioning slot and the short positioning slot.

6. The honeycomb core welding device as described in claim 1, characterized in that, The base plate is also provided with multiple empty tool slots, which are located at the end of the long positioning slot away from the short positioning slot.

7. The honeycomb core welding device as described in claim 1, characterized in that, The positioning comb plate includes multiple support bars, which are connected to each other by pads and screws; each support bar is inserted into a corresponding honeycomb cell.

8. The honeycomb core welding device as described in claim 1, characterized in that, The conductive comb plate includes multiple conductive strips, which are connected to each other by pads and screws; each conductive strip is inserted into a corresponding honeycomb cell.

9. The honeycomb core welding device as described in claim 1, characterized in that, The honeycomb core welding device also includes a wiring board, which is mounted on the conductive comb plate.

10. A method for welding honeycomb cores, characterized in that, The honeycomb core welding method uses the honeycomb core welding device as described in any one of claims 1 to 9 to weld the honeycomb core.

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