A laminated sheet winding apparatus and method

Abstract

The application discloses a kind of laminated board winding device, it is related to composite material winding equipment technical field, winding board is square board, and winding board has first bevel in first angle, has second bevel in second angle;First bevel, second bevel and the recess of each circumferential side wall of winding board are provided;Four guide columns are provided on winding board;Winding board is located between two clamping plates, winding board can be rotated with the diagonal between first angle and second angle as axis relative to clamping plate at any angle;Each clamping plate is connected with winding machine tool by connecting rod;The other end of two clamping plates is respectively provided with one rotation limiting piece, and two limiting pieces in same rotation limiting piece can be located at both sides of winding board.Method: after winding in one direction, winding board is turned over 180°, and winding in another direction is carried out.The application effectively improves the manufacturing efficiency of 0° / 90° laminated board.

Description

Technical Field

[0001] This invention relates to the field of composite material winding equipment technology, and in particular to a laminate winding device and method. Background Technology

[0002] Fiber-reinforced resin matrix composites are widely used in the aerospace field due to their low specific gravity, high specific strength and specific modulus, as well as the directional designability of their properties.

[0003] To assess the performance level of composite material wound components, it is crucial to conduct mechanical property tests. Among all single-stress experiments used to determine the mechanical properties of composite materials, the shear test is the most difficult and complex.

[0004] The most widely used shear characterization method is the ±45° laminate tensile test, and ±45° laminate samples are generally obtained by winding and cutting 0° / 90° laminates.

[0005] Currently, the production of 0° / 90° fiber-wound laminate samples generally involves winding one layer on a winding machine using a unidirectional die, then disassembling the die, rotating it 90°, and reassembling it to complete the layup in the other direction. This process is repeated in an alternating manner. As the number of winding layers increases, the winding die needs to be removed frequently, which is time-consuming and labor-intensive, and the winding accuracy cannot be guaranteed. Summary of the Invention

[0006] The purpose of this invention is to provide a laminate winding device and method to solve the problems existing in the prior art and improve the manufacturing efficiency of 0° / 90° laminates.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] This invention provides a laminate winding device, comprising:

[0009] The winding plate is a square plate, and a triangular notch is provided at the first corner and the second corner opposite to the first corner. The first corner has a first hypotenuse and the second corner has a second hypotenuse. Grooves are provided on the first hypotenuse, the second hypotenuse and each circumferential sidewall of the winding plate.

[0010] Four yarn guide posts are provided, with two of the yarn guide posts located on both sides of the first triangle of the winding plate and the other two yarn guide posts located on both sides of the fourth corner of the winding plate.

[0011] Two clamping plates are provided; the winding plate is located between the two clamping plates. One end of one clamping plate is connected to the first inclined side via a first rotating connector; one end of the other clamping plate is connected to the second inclined side via a second rotating connector. The winding plate can rotate at any angle relative to the clamping plates about the diagonal between the first angle and the second angle as an axis. Each clamping plate is connected to the winding machine tool via a connecting rod. The winding machine tool is used to drive the laminate winding device to rotate.

[0012] A rotation limiting component is provided at the other end of each of the two clamping plates; the rotation limiting component includes two limiting pieces respectively located on both sides of the corresponding clamping plates, one end of the limiting piece is hinged to the corresponding clamping plate; the other end of the limiting piece can be connected to the winding plate by bolts; and the two limiting pieces in the same rotation limiting component can be located on both sides of the winding plate.

[0013] Preferably, the first hypotenuse and the second hypotenuse are parallel to each other and both are perpendicular to the diagonal.

[0014] Preferably, a release bar is provided on each of the two ends of the winding plate along the thickness direction; the winding plate is provided with a placement groove corresponding to the release bar, and the release bar is placed in the corresponding placement groove; threaded holes are provided on both ends of the release bar, and the threaded holes are through holes; any one of the yarn guide posts is closer to the center of the winding plate than any one of the threaded holes.

[0015] The surface of the winding plate is covered with a release cloth, which is used to prevent the release rod from coming out of the placement groove;

[0016] It also includes a release screw for threaded connection with the threaded hole, the length of the release screw being greater than the depth of the threaded hole.

[0017] Preferably, it also includes an upper cover plate and a lower cover plate; both the upper cover plate and the lower cover plate can be connected to the two clamping plates by bolts, and the upper cover plate and the lower cover plate are respectively located on both sides of the winding plate.

[0018] Preferably, both the first rotary connector and the second rotary connector are rotary joints.

[0019] Preferably, the thickness of the winding plate at the third and fourth corners is equal to the interval between the two limiting pieces in the rotation limiting member.

[0020] Preferably, the diameter of the end of the yarn guide post away from the winding plate is larger than the diameter of the other end of the yarn guide post.

[0021] Preferably, the winding plate is provided with a limiting groove corresponding to the limiting piece, and the limiting piece can enter the corresponding limiting groove.

[0022] Preferably, the thickness of the winding plate is equal to the thickness of the clamping plate.

[0023] The present invention also provides a laminate winding method, based on the above-described laminate winding apparatus, comprising the following steps:

[0024] (1) Rotate the winding plate so that the winding plate and the two clamping plates are in the same plane; then rotate the two rotating limiting members so that the winding plate is located between the two limiting pieces of each of the rotating limiting members, and fix the limiting pieces to the winding plate by bolts;

[0025] (2) Connect each of the clamps to the winding machine via a connecting rod; then fix the yarn on a yarn guide post for unidirectional winding;

[0026] (3) After winding is completed, remove the bolts between the limiting piece and the winding plate, then rotate the winding plate 180°, and guide the yarn through the yarn guide post on the winding plate to switch the initial winding position; then rotate the two rotating limiting pieces so that the winding plate is located between the two limiting pieces of each rotating limiting piece, and fix the limiting piece to the winding plate with bolts;

[0027] (4) Perform winding in another direction;

[0028] (5) After the winding is completed, the upper cover plate and the lower cover plate are connected to the clamping plate respectively, so that the winding plate and the sample on the winding plate are clamped between the upper cover plate and the lower cover plate; then the laminate winding device is sent into the curing oven to cure and shape the sample.

[0029] (6) After curing, remove the upper cover plate and the lower cover plate, and release the rotation limiting member from the winding plate. Cut the sample along the grooves on the four sides of the winding plate. Then, slowly screw the demolding screw into the threaded hole of the demolding rod to drive the sample to gradually separate from the winding plate and complete the demolding process.

[0030] The present invention achieves the following technical effects compared to the prior art:

[0031] The laminate winding apparatus and method of the present invention effectively improve the manufacturing efficiency of 0° / 90° laminates.

[0032] Furthermore, the laminate winding device and method of the present invention can complete the winding of laminates at different angles in one machine tool clamping. The overall structure is simple, the mold components are easy to assemble and disassemble, and the overall sample preparation efficiency is improved.

[0033] Furthermore, the present invention uses a rotary joint to allow the winding plate to rotate freely along the diagonal axis, directly changing the winding direction of the laminate. Compared with the traditional mold form, this simplifies the structure and operation method and improves the sample preparation efficiency.

[0034] Furthermore, the present invention adopts a combination of a rotating limiting plate and a limiting groove, which not only ensures the size requirements of the mold but also meets the strength requirements. The structure is simple, and with the rotation of the winding plate, it can achieve quick assembly and disassembly.

[0035] Furthermore, the present invention uses a yarn guide post to guide the yarn to change its initial winding position after the winding plate is rotated and fixed, which ensures that the size and position of each layer of winding are fixed and improves the accuracy of the overall size of the prepared sample.

[0036] Furthermore, the present invention adopts a structure in which the upper cover plate and the lower cover plate are directly limited and fixed to the clamping plate, which not only meets the requirements of sample thickness and surface smoothness, but also avoids frequent disassembly and assembly between the clamping plate and the winding plate during curing, thus improving the sample preparation efficiency.

[0037] Furthermore, the present invention employs a design with pre-embedded release rods and release screws, which effectively reduces the difficulty of demolding the sample, decreases the possibility of internal damage to the sample during demolding, and improves the success rate of sample preparation. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in 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.

[0039] Figure 1 This is a schematic diagram of the laminate winding device of the present invention;

[0040] Figure 2 This is a schematic diagram of the laminate winding device of the present invention;

[0041] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0042] Figure 4 This is a schematic diagram showing the rotation of the winding plate relative to the clamping plate in the laminate winding device of the present invention;

[0043] Among them, 1. connecting rod; 2. clamping plate; 3. winding plate; 301. groove; 4. upper cover plate; 5. rotary joint; 6. first bolt; 7. positioning pin; 8. rotation limiter; 801. limit plate; 9. second bolt; 10. yarn guide post; 11. lower cover plate; 12. demolding rod; 13. threaded hole. Detailed Implementation

[0044] 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.

[0045] The purpose of this invention is to provide a laminate winding device and method to solve the problems existing in the prior art and improve the manufacturing efficiency of 0° / 90° laminates.

[0046] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Example 1

[0048] like Figures 1 to 4 As shown, this embodiment provides a laminate winding device, including a winding assembly, a cover plate assembly, and a demolding assembly.

[0049] The winding assembly includes a winding plate 3, four yarn guide posts 10, two clamping plates 2, and two rotation limiting members 8.

[0050] The winding plate 3 is a square plate, and the first corner and the second corner opposite to the first corner are respectively provided with triangular notches. The first corner has a first hypotenuse, and the second corner has a second hypotenuse. The first hypotenuse, the second hypotenuse, and each circumferential sidewall of the winding plate 3 are provided with grooves 301. Four yarn guides 10 are provided, two of which are provided on both sides of the third triangle of the winding plate 3, and the other two are provided on both sides of the fourth corner of the winding plate 3. The first corner, the second corner, the third corner, and the fourth corner are all included angles between two adjacent circumferential sidewalls. Specifically, both ends of the winding plate 3 along the thickness direction are square, and the other ends of the winding plate 3, except for the two ends along the thickness direction, are circumferential sidewalls.

[0051] The winding plate 3 is located between two clamping plates 2. One end of one clamping plate 2 is connected to the first inclined side through a first rotating connector; the other end of the clamping plate 2 is connected to the second inclined side through a second rotating connector. The winding plate 3 can rotate relative to the clamping plate 2 at any angle about the diagonal between the first angle and the second angle. Each clamping plate 2 is connected to the output shaft of the winding machine through a connecting rod 1. The winding machine can drive the laminate winding device to rotate about the two connecting rods 1. In this embodiment, both the first rotating connector and the second rotating connector are rotary joints 5.

[0052] In this embodiment, the first hypotenuse and the second hypotenuse are parallel to each other and both perpendicular to the diagonals of the first angle and the second angle. The rotation axes of both the first and second rotary connectors are coaxial with the diagonals of the first angle and the second angle.

[0053] Each of the two clamping plates 2 has a rotating limiting member 8 at its other end. The rotating limiting member 8 includes two limiting pieces 801 located on either side of the corresponding clamping plate 2. One end of each limiting piece 801 is hinged to the corresponding clamping plate 2; the other end of each limiting piece 801 can be connected to the winding plate 3 via a second bolt 9. The two limiting pieces 801 in the same rotating limiting member 8 can be located on either side of the winding plate 3. The winding plate 3 has a limiting groove corresponding to each limiting piece 801, allowing the limiting piece 801 to enter the corresponding limiting groove. The thickness of the winding plate 3 at the third and fourth corners is equal to the spacing between the two limiting pieces 801 in the rotating limiting member 8.

[0054] The demolding assembly includes demolding rods 12 and demolding screws; a demolding rod 12 is provided on each of the two ends of the winding plate 3 along the thickness direction; the winding plate 3 is provided with a placement groove corresponding to the demolding rod 12, and the demolding rod 12 is placed in the corresponding placement groove; threaded holes 13 are provided on both ends of the demolding rod 12, and the threaded holes 13 are through holes; any one of the yarn guide posts 10 is closer to the center of the winding plate 3 than any one of the threaded holes 13; a demolding cloth is attached to the surface of the winding plate 3, and the demolding cloth is used to prevent the demolding rod 12 from coming out of the placement groove; the demolding screw is used to thread into the threaded hole 13, and the length of the demolding screw is greater than the depth of the threaded hole 13.

[0055] The cover plate assembly includes an upper cover plate 4 and a lower cover plate 11; both the upper cover plate 4 and the lower cover plate 11 can be connected to two clamping plates 2 by means of a first bolt 6 and a locating pin 7, and the upper cover plate 4 and the lower cover plate 11 are located on both sides of the winding plate 3. The thickness of the winding plate 3 is equal to the thickness of the clamping plate 2.

[0056] The diameter of the end of the yarn guide post 10 away from the winding plate 3 is larger than the diameter of the other end of the yarn guide post 10. That is, the diameter of the yarn guide post 10 is thicker at the top and thinner at the bottom, which effectively avoids the slippage of the fiber yarn bundle during the winding process and improves the overall winding processability.

[0057] Example 2

[0058] This embodiment provides a laminate winding method based on the laminate winding apparatus of Embodiment 1, including the following steps:

[0059] (1) Rotate the winding plate 3 so that the winding plate 3 and the two clamping plates 2 are in the same plane; then rotate the two rotating limiting members 8 so that the winding plate 3 is located between the two limiting pieces 801 of each rotating limiting member 8, and fix the limiting pieces 801 to the winding plate 3 by the second bolt 9.

[0060] (2) Connect each clamping plate 2 to the winding machine through the connecting rod 1; then fix the yarn on a yarn guide post 10 and wind it in one direction to obtain a one-way plate;

[0061] (3) After winding is completed, remove the second bolt 9 between the limiting piece 801 and the winding plate 3, then rotate the winding plate 3 180°, and guide the yarn through the yarn guide post 10 on the winding plate 3 to switch the initial winding position; then rotate the two rotating limiting pieces 8 so that the winding plate 3 is located between the two limiting pieces 801 of each rotating limiting piece 8, and fix the limiting piece 801 to the winding plate 3 by the second bolt 9;

[0062] (4) Perform winding in another direction; obtain a one-way plate in another direction, and stack it with the one-way plate in step (2), and the two one-way plates in different directions form a laminate.

[0063] (5) After the winding is completed, the upper cover plate 4 and the lower cover plate 11 are connected to the clamping plate 2 by the first bolt 6 and the positioning pin 7, so that the winding plate 3 and the sample on the winding plate 3 (i.e. the laminate obtained after winding in two directions) are clamped between the upper cover plate 4 and the lower cover plate 11; then the laminate winding device is sent into the curing oven to cure and shape the sample.

[0064] (6) After curing, remove the upper cover plate 4 and the lower cover plate 11, and release the rotation limiter 8 from the winding plate 3. Cut the sample along the grooves 301 on the four sides of the winding plate 3. Then, use a tool (such as a utility knife) to puncture the release cloth on the threaded hole 12 and make a hole in the release cloth that is directly opposite to the threaded hole 13, so that the release screw can be screwed into the threaded hole 13. Then, slowly screw the release screw into the threaded hole 13 of the release rod 12. With the help of the reaction force of the release screw and the winding plate 3, the release rod 12 and the sample are slowly lifted up together, which reduces the possibility of sample damage during demolding. The structure is simple and the demolding is convenient, which improves the sample success rate and demolding efficiency. Demolding is completed when the sample is completely separated from the winding plate 3.

[0065] It is worth noting that since any one of the yarn guide posts 10 is closer to the center of the winding plate 3 than any one of the threaded holes 13, the threaded hole 13 is located outside the edge of the sample formed after winding, so that the sample formed after winding will not affect the screwing in of the release screw.

[0066] In the description of this invention, it should be noted that the terms "center," "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A laminate winding device, characterized in that, include: The winding plate is a square plate, and a triangular notch is provided at the first corner and the second corner opposite to the first corner. The first corner has a first hypotenuse and the second corner has a second hypotenuse. Grooves are provided on the first hypotenuse, the second hypotenuse and each circumferential sidewall of the winding plate. Four yarn guide posts are provided, with two of the yarn guide posts located on both sides of the first triangle of the winding plate and the other two yarn guide posts located on both sides of the fourth corner of the winding plate. Two clamping plates are provided; the winding plate is located between the two clamping plates. One end of one clamping plate is connected to the first inclined side via a first rotating connector; one end of the other clamping plate is connected to the second inclined side via a second rotating connector. The winding plate can rotate at any angle relative to the clamping plates about the diagonal between the first angle and the second angle as an axis. Each clamping plate is connected to the winding machine tool via a connecting rod. The winding machine tool is used to drive the laminate winding device to rotate. A rotation limiting component is provided at the other end of each of the two clamping plates; the rotation limiting component includes two limiting pieces respectively located on both sides of the corresponding clamping plates, one end of the limiting piece is hinged to the corresponding clamping plate; the other end of the limiting piece can be connected to the winding plate by bolts; and the two limiting pieces in the same rotation limiting component can be located on both sides of the winding plate.

2. The laminate winding device according to claim 1, characterized in that: The first hypotenuse and the second hypotenuse are parallel to each other and both are perpendicular to the diagonal.

3. The laminate winding device according to claim 1, characterized in that: The winding plate is provided with a release bar on each of its two ends along the thickness direction; the winding plate is provided with a placement groove corresponding to the release bar, and the release bar is placed in the corresponding placement groove; the two ends of the release bar are provided with threaded holes, and the threaded holes are through holes; any one of the yarn guide posts is closer to the center of the winding plate than any one of the threaded holes. The surface of the winding plate is covered with a release cloth, which is used to prevent the release rod from coming out of the placement groove; It also includes a release screw for threaded connection with the threaded hole, the length of the release screw being greater than the depth of the threaded hole.

4. The laminate winding device according to claim 1, characterized in that: It also includes an upper cover plate and a lower cover plate; both the upper cover plate and the lower cover plate can be connected to the two clamping plates by bolts, and the upper cover plate and the lower cover plate are respectively located on both sides of the winding plate.

5. The laminate winding device according to claim 1, characterized in that: Both the first rotary connector and the second rotary connector are rotary joints.

6. The laminate winding device according to claim 1, characterized in that: The thickness of the winding plate at the third and fourth corners is equal to the interval between the two limiting plates in the rotation limiting member.

7. The laminate winding device according to claim 1, characterized in that: The diameter of the end of the yarn guide post furthest from the winding plate is greater than the diameter of the other end of the yarn guide post.

8. The laminate winding device according to claim 1, characterized in that: The winding plate is provided with a limiting groove corresponding to the limiting piece, and the limiting piece can enter the corresponding limiting groove.

9. The laminate winding device according to claim 1, characterized in that: The thickness of the winding plate is equal to the thickness of the clamping plate.

10. A method for winding laminated boards, characterized in that, The laminate winding apparatus according to any one of claims 1-9 includes the following steps: (1) Rotate the winding plate so that the winding plate and the two clamping plates are in the same plane; then rotate the two rotating limiting members so that the winding plate is located between the two limiting pieces of each of the rotating limiting members, and fix the limiting pieces to the winding plate by bolts; (2) Connect each of the clamps to the winding machine via a connecting rod; then fix the yarn on a yarn guide post for unidirectional winding; (3) After winding is completed, remove the bolts between the limiting piece and the winding plate, then rotate the winding plate 180°, and guide the yarn through the yarn guide post on the winding plate to switch the initial winding position; then rotate the two rotating limiting pieces so that the winding plate is located between the two limiting pieces of each rotating limiting piece, and fix the limiting piece to the winding plate with bolts; (4) Perform winding in another direction; (5) After the winding is completed, the upper cover plate and the lower cover plate are connected to the clamping plate respectively, so that the winding plate and the sample on the winding plate are clamped between the upper cover plate and the lower cover plate; then the laminate winding device is sent into the curing oven to cure and shape the sample. (6) After curing, remove the upper cover plate and the lower cover plate, and release the rotation limiting member from the winding plate. Cut the sample along the grooves on the four sides of the winding plate. Then, slowly screw the demolding screw into the threaded hole of the demolding rod to drive the sample to gradually separate from the winding plate and complete the demolding process.

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