Needle plate assembly and carbon / carbon needling machine

Abstract

The utility model relates to a needle plate assembly and a carbon / carbon needling machine. The needle plate assembly comprises a first needle plate and a second needle plate. The first needle plate is provided with a first embedding surface and a plurality of first needle holes penetrating through the first embedding surface, and the first embedding surface is provided with a first matching part; the second needle plate is provided with a second embedding surface and a plurality of second needle holes penetrating through the second embedding surface; the second embedding surface is provided with a continuous second matching part; a plurality of parallel needling datum lines penetrate through the first needle plate and the second needle plate, and the first needle holes and the second needle holes are formed parallel to the needling datum lines; a base material to be processed is placed between the first embedding surface and the second embedding surface; at least one first matching part is arranged to be a convex part, and at least one second matching part is arranged to be a concave part; the convex parts and the concave parts are correspondingly and complementarily arranged; a needling space is formed between the convex part and the concave part, and the base material to be processed in the needling space is inclined relative to the needling datum line.

Description

Technical Field

[0001] This application relates to the field of carbon fiber preform needle punching technology, and in particular to a needle plate assembly and a carbon / carbon needle punching machine. Background Technology

[0002] With the development of carbon fiber preform needle punching technology, the needle punching process requires repeatedly needle punching carbon fiber cloth and carbon fiber mesh in parallel layers at a certain ratio to obtain the preform. During this process, flat needles are used to guide the needles into the carbon fiber cloth and mesh. Needling fixes the fiber layers together, preventing relative displacement during production and ensuring a stable structure for the preform. However, the preform obtained by the current method has very low strength in its thickness direction, making it prone to delamination and cracking during production or use, thus affecting its service life. Utility Model Content

[0003] Therefore, it is necessary to provide a needle plate assembly and a carbon / carbon needle punching machine to address the problem of insufficient strength in the thickness direction of carbon fiber precast plates processed by needle punching plates.

[0004] A needle plate assembly includes a first needle plate having a plurality of first needle holes and a first mating surface, wherein a first fitting part is provided on the first mating surface and the first needle holes penetrate the first mating surface.

[0005] The second needle plate has several second needle holes and a second mating surface. A second mating part is provided on the second mating surface, and the second needle holes penetrate the second mating surface.

[0006] The first needle plate and the second needle plate have several parallel needle puncture reference lines, and the first needle hole and the second needle hole are opened parallel to the needle puncture reference lines; the first mating surface and the second mating surface are used to place the substrate to be processed; at least one first mating part is set as a protrusion, and at least one second mating part is set as a recess, with the protrusion and the recess being correspondingly complementary; a needle puncture space is formed between the protrusion and the recess, and the substrate to be processed in the needle puncture space is inclined relative to the needle puncture reference lines.

[0007] In one embodiment, the first mating surface and the second mating surface are disposed opposite to each other, and the distance between the first mating surface and the second mating surface is always equal.

[0008] In one embodiment, the first mating portion is configured as a protrusion and / or a recess; the second mating portion is configured as a protrusion and / or a recess.

[0009] The first and second mating parts that form the same acupuncture space are arranged in a complementary manner.

[0010] In one embodiment, the first mating part is alternately configured with protrusions and recesses on the first mating surface; the second mating part is alternately configured with protrusions and recesses on the second mating surface.

[0011] In one embodiment, the first pinholes are evenly arranged along the length of the first pin plate; the second pinholes are evenly arranged along the length of the second pin plate.

[0012] In one embodiment, the second pinholes are arranged in the mating area of ​​the second needle plate, the mating area is set as a strip area along the length direction of the second needle plate, and the mating area is located in the middle of the second needle plate.

[0013] The second needle plate surface has load-bearing guide areas on both sides of the mating area, which are used to guide the movement of the substrate to be processed.

[0014] In one embodiment, the first pinhole and the second pinhole are provided in a one-to-one correspondence, and the pinhole diameters of the first pinhole and the second pinhole are the same.

[0015] In one embodiment, the first needle plate and the second needle plate have the same length and the same thickness, and the width of the second needle plate is greater than the width of the first needle plate.

[0016] In one embodiment, both the first needle plate and the second needle plate are made of carbon steel.

[0017] A needle-punching machine includes the aforementioned needle plate assembly.

[0018] The aforementioned needle plate assembly includes: a first needle plate and a second needle plate. The first needle plate has several first needle holes and a first mating surface, with a first fitting portion on the first mating surface, and the first needle holes penetrating the first mating surface. The second needle plate has several second needle holes and a second mating surface, with continuous second fitting portions on the second mating surface, and the second needle holes penetrating the second mating surface; several parallel needle-punching reference lines pierce through the first and second needle plates, and both the first and second needle holes are parallel to the needle-punching reference lines; a substrate to be processed is placed between the first and second mating surfaces; at least one first fitting portion is a protrusion, and at least one second fitting portion is a recess; the protrusion and the recess are correspondingly complementary; a needle-punching space is formed between the protrusion and the recess, and the substrate to be processed within the needle-punching space is inclined relative to the needle-punching reference lines. During needle punching, ensure that the direction of the needle punching is at a certain angle to the thickness direction of the substrate to be processed. This ensures that the needle is inserted at an angle. The resulting carbon / carbon sheet has higher interlaminar strength and shear strength, a higher proportion of carbon fiber, and higher flexural and compressive strength.

[0019] A carbon / carbon needle punching machine includes the aforementioned needle plate assembly and has the aforementioned beneficial effects. Attached Figure Description

[0020] Figure 1 This is a side sectional view of the needle plate assembly provided in an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the structure of the first needle plate provided in an embodiment of this application.

[0022] Figure 3 This is a schematic diagram of the structure of the second needle plate provided in an embodiment of this application.

[0023] Figure 4 This is a top view of the second needle plate provided in an embodiment of this application.

[0024] Icon labels:

[0025] 1. First needle plate; 11. First needle hole; 12. First mating surface; 13. First mating part;

[0026] 2. Second needle plate; 21. Second needle hole; 22. Second mating surface; 23. Second mating part;

[0027] S1, mating space; S2, needle-punching space; S3, fitting area; S4, load-bearing guide area;

[0028] A. Acupuncture baseline; B. First direction; C. Second direction. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms 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 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.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] See Figure 1 As shown, Figure 1This is a side cross-sectional view of a needle plate assembly provided in an embodiment of this application, showing a needle plate assembly including a first needle plate 1 and a second needle plate 2. The first needle plate 1 has several first needle holes 11, which penetrate the first needle plate 1 along its thickness direction. The second needle plate 2 has several second needle holes 21, which penetrate the second needle plate 2 along its thickness direction. The first needle plate 1 has a first mating surface 12, and the second needle plate 2 has a second mating surface 22. The needle plate assembly also has several needle-piercing reference lines A penetrating the first needle plate 1 and the second needle plate 2, which are arranged parallel to each other.

[0036] The thickness directions of both the first needle plate 1 and the second needle plate 2 are set on the needle puncture reference line A. The needle puncture reference line A is a virtual reference line, not an actual physical object. It is used to simulate the movement path of the needle during needle puncture. The first needle hole 11 and the second needle hole 21 are both set parallel to the needle puncture reference line A. This guides the needles inserted through the first needle plate 1 and the second needle plate 2 to perform needle puncture along the needle puncture reference line A.

[0037] The substrate to be processed is disposed between the first mating surface 12 and the second mating surface 22. The substrate to be processed can be made of different materials in different application scenarios. In one embodiment of this application, taking the production and processing of carbon / carbon composite prefabricated panels as an example, the substrate to be processed includes carbon fiber cloth and carbon fiber mesh, etc., which are collectively referred to as carbon fiber prefabricated substrate.

[0038] A mating space S1 is provided between the first mating surface 12 and the second mating surface 22, and the mating space S1 is used to place the carbon fiber prefabricated substrate. A first mating part 13 is provided on the first mating surface 12 of the first needle plate 1, and a second mating part 23 is provided on the second mating surface 22 of the second needle plate 2. In actual use, the first mating surface 12 and the second mating surface 22 are arranged opposite to each other, and the first mating part 13 on the first mating surface 12 and the second mating part 23 on the second mating surface 22 are arranged in a one-to-one correspondence. A needle-punching space S2 is formed between the corresponding first mating part 13 and the second mating part 23, and the mating space S1 is formed by combining consecutive needle-punching spaces S2.

[0039] Furthermore, at least one of the first mating portions 13 on the first mating surface 12 protrudes relative to the first mating surface 12 to form a protrusion, and at least one of the second mating portions 23 on the second mating surface 22 is recessed relative to the second mating surface 22 to form a recess. The protrusions and recesses between the first mating surface 12 and the second mating surface 22 are always in a complementary state. Assuming that the protrusions and recesses fit together, the protrusions and recesses will be completely conformally embedded. The needle-punching space S2 is opened between the protrusions and recesses, such that the needle-punching space S2 is offset relative to other adjacent needle-punching spaces S2 along an interlacing direction, where the interlacing direction refers to any direction along the length of the needle-punching reference line A.

[0040] After the carbon fiber preform substrate is placed in the mating space S1, the first needle plate 1 and the second needle plate 2 will limit the carbon fiber preform substrate, causing it to conformally fit within the mating space S1. The carbon fiber preform substrate will conformally create a depression or a protrusion at the corresponding positions of the first mating part 13 and the second mating part 23. Simultaneously, because the first needle hole 11 is opened along the thickness direction of the first needle plate 1, and the second needle hole 21 is opened along the thickness direction of the second needle plate 2, the needles inserted from the first needle hole 11 and the second needle hole 21 are inserted into the carbon fiber preform substrate at an angle. That is, because the thickness direction of the substrate to be processed is offset relative to the length direction of the needle piercing reference line A, the needles inserted along the needle piercing reference line A will obliquely penetrate into the carbon fiber preform substrate. This ensures that during needle piercing, the direction of the needle piercing has a certain degree of inclination relative to the thickness direction of the substrate to be processed, ensuring that the needles penetrate obliquely. Laterally inserted needles can cause different layers of carbon fibers to interweave and entwine, significantly enhancing the bonding force between layers, making the overall structure of the precast slab more stable, effectively preventing interlayer separation, improving the precast slab's ability to work together under external forces, and thus enhancing its mechanical properties.

[0041] Meanwhile, lateral needle punching results in a more uniform and three-dimensional distribution of carbon fibers within the precast slab. When the precast slab is subjected to shear forces, this structure better resists shear deformation, disperses stress concentration, and thus improves the shear strength of the precast slab. This makes the precast slab less prone to failure under complex stress conditions, extending its service life. Due to the complex fiber structure formed by lateral needle punching, the precast slab can absorb more energy when impacted, acting as a buffer and shock absorber, reducing the damage to the precast slab and related structures. This is particularly important for applications that require dynamic or impact loads, such as aerospace and automotive manufacturing, as it can improve the safety and reliability of the structure.

[0042] Furthermore, the carbon fiber is positioned more fixedly in the precast slab, making it less prone to displacement and deformation. This improves the dimensional stability of the precast slab and ensures that its shape and size remain relatively stable under different usage conditions. This is beneficial for improving the assembly accuracy with other components and the overall structural stability.

[0043] In this application, the first needle plate 1 and the second needle plate 2 are respectively the upper plate and the lower plate in the needle punching process, and the first needle plate 1 and the second needle plate 2 can be interchanged as the upper plate and the lower plate according to actual needs.

[0044] In one embodiment of this application, the first mating surface 12 and the second mating surface 22 are correspondingly arranged, and the distance L between the first mating surface 12 and the second mating surface 22 is always equal. Furthermore, the distance L along the direction of the acupuncture reference line A within any acupuncture space S2 is equal; that is, the distance from the first mating part 13 to the second mating part 23 within any acupuncture space S2 is equal.

[0045] In one embodiment of this application, the first mating part 13 is continuously disposed on the surface of the first mating surface 12, and the second mating part 23 is also continuously disposed on the surface of the second mating surface 22.

[0046] The first mating portion 13 can protrude from the first mating surface 12 to form a protrusion, or it can protrude from the first mating surface 12 to form a recess. Different first mating portions 13 on the first mating surface 12 can simultaneously be either protrusions or recesses. Similarly, the second mating portion 23 can protrude from the second mating surface 22 to form a protrusion, or it can protrude from the second mating surface 22 to form a recess. Different second mating portions 23 on the second mating surface 22 can simultaneously be either protrusions or recesses.

[0047] However, when forming protrusions and depressions, it is necessary to ensure that the first mating part 13 and the second mating part 23 located in the same needle-punching space S2 are correspondingly complementary. That is, when the first mating part 13 is set as a protrusion, the second mating part 23 needs to be correspondingly set as a depression, and the shapes of the protrusion and the depression can fit and complement each other, and vice versa. The first mating part 13 and the second mating part 23 are correspondingly set in each needle-punching space S2 according to the above requirements, so that the first mating surface 12 and the second mating surface 22 in the needle-punching space S2 are in a curved corresponding arrangement, thereby ensuring that the substrate to be processed is inclined in the direction of the needle-punching space S2 relative to the needle-punching reference line A.

[0048] In one embodiment of this application, the first mating portions 13 on the first mating surface 12 are alternately configured with protrusions and recesses, forming a continuous wavy surface on the first mating surface 12; correspondingly, the second mating portions 23 on the second mating surface 22 are also alternately configured with protrusions and recesses. By fitting the first mating surface 12 and the second mating surface 22 into a corresponding position, the substrate to be processed within each needle-punching space S2 is inclined relative to the direction of the needle-punching reference line A.

[0049] In one embodiment of this application, reference is made to the appended specification. Figure 2 and attached Figure 3 , Figure 2 This is a schematic diagram of the structure of the first needle plate provided in an embodiment of this application. Figure 3 This is a schematic diagram of the structure of the second needle plate provided in the embodiment of this application. A first direction B and a second direction C that are perpendicular to each other in the coordinate system are set. When in use, the length of the first needle plate 1 and the length of the second needle plate 2 are both set parallel to the first direction B.

[0050] The width of the first needle plate 2 and the width of the second needle plate 2 are both set parallel to the second direction C.

[0051] It should be noted that the first direction B and the second direction C are only a means to help clearly describe the technical solution, and do not limit or affect the structure of the first needle plate 1 and the second needle plate 2.

[0052] The first pinhole 11 is evenly distributed along the length of the first pin plate 1; the second pinhole 21 is evenly distributed along the length of the second pin plate 2. This ensures a one-to-one correspondence between the first pinhole 11 and the second pinhole 21, resulting in uniform needle punching. Uniform needle punching allows for more consistent entanglement of carbon fibers within the precast slab, enhancing its overall strength and stability. Regardless of whether subjected to tensile, compressive, or bending forces, the mechanical properties of different parts of the precast slab exhibit minimal differences, improving its reliability and service life. The uniformly distributed pinhole design makes the production process more controllable. Operators can accurately adjust needle punching parameters, such as frequency, depth, and pressure, based on the pinhole distribution pattern to ensure each punch achieves the desired effect. This helps improve production stability and repeatability, reducing product quality fluctuations caused by uneven needle punching.

[0053] In one embodiment of this application, reference is made to the appended specification. Figure 4 , Figure 4This is a top view of the second needle plate provided in this embodiment. The second needle holes 21 are arranged within the fitting area S3 of the second needle plate 2. The fitting area S3 is a strip-shaped area along the length of the second needle plate 2 and is located in the middle of the second needle plate 2. Simultaneously, a bearing guide area S4 is provided on both sides of the fitting area S3 on the surface of the second needle plate 2, dividing the second needle plate 2 into the fitting area S3 and the bearing guide area S4. In actual use, the fitting area S3 completely corresponds to the area on the first needle plate 1 where the first needle holes 11 are located, forming a mating space between them. Needling of the substrate to be processed is only performed within the mating space. The unprocessed and processed portions of the substrate are placed within the bearing guide area S4 of the second needle plate 2. The bearing guide area S4 guides the movement of the substrate, allowing the needle punching machine to move directionally and gradually process and puncture the substrate along a certain direction.

[0054] In one embodiment of this application, the first pinhole 11 and the second pinhole 21 are provided in a one-to-one correspondence, and the pinhole diameters of the first pinhole 11 and the second pinhole 21 are the same. This ensures uniformity of the piercing effect. When the pinholes correspond and have the same diameter, the needle can more accurately interweave different layers of carbon fibers during the piercing process. This allows the fibers to be pierced and wrapped more consistently throughout the board, thus ensuring a uniform degree of fiber interweaving throughout the preform. This avoids localized fiber accumulation or sparseness, improving the overall mechanical properties of the preform.

[0055] In one embodiment of this application, the first needle plate 1 and the second needle plate 2 have the same length and the same thickness, and the width of the second needle plate 2 is greater than the width of the first needle plate 1. This arrangement ensures consistent vertical movement of the upper and lower needle plates during acupuncture. This allows the needle to penetrate the carbon fiber layer more accurately, improving the precision and stability of acupuncture.

[0056] Furthermore, because the second needle plate is wider, it can guide and position the first needle plate to a certain extent. During the operation of the acupuncture device, this helps to maintain the relative stability of the upper and lower needle plates, reducing needle plate displacement caused by vibration or other factors, thereby ensuring the uniformity of the acupuncture effect.

[0057] In one embodiment of this application, both the first needle plate 1 and the second needle plate 2 are made of carbon steel. Carbon steel plates have high strength and rigidity, which can ensure that the substrate to be processed can be bent within the mating space, allowing the needle to be inserted at an angle.

[0058] A carbon / carbon needle punching machine is disclosed for processing carbon / carbon precast panels, comprising the aforementioned needle-plate assembly. The specific structure and operation method of the carbon / carbon needle punching machine can be found in existing technologies and will not be elaborated upon herein.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A needle plate assembly, characterized in that, include: The first needle plate (1) has several first needle holes (11) and a first mating surface (12). A first mating part (13) is provided on the first mating surface (12). The first needle holes (11) penetrate the first mating surface (12). The second needle plate (2) has several second needle holes (21) and a second mating surface (22). A second mating part (23) is provided on the second mating surface (22). The second needle holes (21) penetrate the second mating surface (22). A plurality of parallel needle puncture reference lines are provided through the first needle plate (1) and the second needle plate (2). The first needle hole (11) and the second needle hole (21) are both opened parallel to the needle puncture reference lines. The first mating surface (12) and the second mating surface (22) are used to place the substrate to be processed. At least one of the first mating parts (13) is set as a protrusion and at least one of the second mating parts (23) is set as a recess. The protrusion and the recess are correspondingly and complementary. A needle puncture space is formed between the protrusion and the recess. The substrate to be processed in the needle puncture space is inclined relative to the needle puncture reference lines.

2. The needle plate assembly according to claim 1, characterized in that, The first mating surface (12) and the second mating surface (22) are arranged opposite to each other, and the distance between the first mating surface (12) and the second mating surface (22) is always equal.

3. The needle plate assembly according to claim 1, characterized in that, The first mating part (13) is configured as the protrusion and / or the recess; the second mating part (23) is configured as the protrusion and / or the recess; The first mating part (13) and the second mating part (23) forming the same needle puncture space are respectively and complementary.

4. The needle plate assembly according to claim 1, characterized in that, The first mating part (13) is alternately configured with the protrusion and the recess on the first mating surface (12); The second mating part (23) is alternately configured with the protrusion and the recess on the second mating surface (22).

5. The needle plate assembly according to claim 1, characterized in that, The first pinhole (11) is evenly arranged along the length of the first pin plate (1); the second pinhole (21) is evenly arranged along the length of the second pin plate (2).

6. The needle plate assembly according to claim 1, characterized in that, The second pinhole (21) is arranged in the fitting area of ​​the second pin plate (2), the fitting area is set as a strip area along the length direction of the second pin plate (2), and the fitting area is located in the middle of the second pin plate (2); The second needle plate (2) has a bearing guide area on both sides of the fitting area, which is used to guide the movement of the substrate to be processed.

7. The needle plate assembly according to claim 1, characterized in that, The first pinhole (11) and the second pinhole (21) are set in a one-to-one correspondence, and the pinhole diameters of the first pinhole (11) and the second pinhole (21) are the same.

8. The needle plate assembly according to claim 1, characterized in that, The first needle plate (1) and the second needle plate (2) have the same length, the first needle plate (1) and the second needle plate (2) have the same thickness, and the width of the second needle plate (2) is greater than the width of the first needle plate (1).

9. The needle plate assembly according to claim 1, characterized in that, Both the first needle plate (1) and the second needle plate (2) are made of carbon steel.

10. A carbon / carbon needle punching machine, characterized in that, Includes the needle plate assembly as described in any one of claims 1-9.

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