A carbon fiber braiding machine ring vibration device and braiding combination assembly

Abstract

The utility model discloses a kind of carbon fiber braider annular ring vibration devices and weaving combination components, device includes vibration ring combination piece, connecting shaft, fixed ring and vibration motor, vibration ring combination piece is connected with connecting shaft by even distribution connecting rod, through rubber shock absorber elastic support, surface precision polishing treatment;Connecting shaft can be slidably adjusted vibration ring and weaving area spacing, and form two-way vibration field in cooperation with two groups of devices symmetrically arranged on two sides. Vibration motor drives vibration ring to generate high-frequency vibration, destroys electrostatic adsorption between fiber and hairiness winding, reduces frictional resistance and adapts to different tow specifications and weaving speed. Weaving combination component realizes positive and negative weaving synergistic effect by symmetrical layout, effectively solve the problems such as fiber accumulation jam, tension fluctuation, improve weaving density uniformity and structural strength consistency, significantly improve high-speed weaving quality and efficiency, applicable to aerospace, new energy vehicles and other fields High-performance carbon fiber preform preparation.

Description

Technical Field

[0001] This utility model relates to the field of textile equipment technology, specifically to a circular vibration device and weaving assembly for a carbon fiber braiding machine. Background Technology

[0002] In the fields of high-end equipment manufacturing and advanced composite material processing, carbon fiber weaving technology, as a key process for achieving the molding of high-performance structural materials, is undergoing technological iteration and application expansion. Carbon fiber weaving involves using precision weaving machinery to process carbon fiber bundles, or blends them with other high-performance fibers such as glass fiber and aramid fiber, into preforms with specific geometric configurations and mechanical properties. Its core lies in endowing composite material products with superior specific strength, specific modulus, and structural stability through fiber orientation design, yarn tension control, and optimized weaving structure. This technology is widely used in aerospace structural components such as aircraft wing skins and rocket engine casings; lightweight components for new energy vehicles such as battery trays and vehicle frames; and high-end sports equipment such as carbon fiber rackets and bicycle frames. It is a core technological means to achieve weight reduction, efficiency improvement, and performance enhancement in key equipment.

[0003] Currently, carbon fiber weaving mainly relies on automated weaving machinery. Among them, the circular weaving machine has become one of the mainstream equipment for carbon fiber preform preparation due to its advantages such as efficient continuous forming and the ability to prepare complex rotating structures. However, during high-speed weaving, the linear speed can reach 80-150 meters per minute. The high-frequency friction generated between the carbon fiber tow and mechanical components such as yarn guides, tensioners, and weaving needles has triggered a series of technical challenges that urgently need to be solved: on the one hand, the surface resistivity of carbon fiber is relatively high, approximately 10 ppm. 2 -10 6 The static charge generated by friction (Ω·cm) is difficult to dissipate quickly, leading to electrostatic attraction between fiber bundles, causing filament adhesion and even knotting. Furthermore, carbon fiber monofilaments are only 5-8 micrometers in diameter and have natural surface defects. High-speed friction easily causes the fiber sheath to peel off, forming fuzzy, exposed monofilaments. These fuzzy fibers entangle under static electricity, further blocking the yarn channels. These problems directly lead to fiber accumulation, tension fluctuations, and disordered weaving structures during the weaving process, sometimes causing equipment shutdowns and affecting the consistency of the product's structural strength. Industry statistics show that the scrap rate due to fiber adhesion and jamming can reach 12%-15% under high-speed weaving conditions, becoming a bottleneck restricting the efficiency and quality of carbon fiber weaving.

[0004] In existing technologies, measures to address static electricity issues in carbon fiber weaving typically include treating the yarn guide components with conductive coatings, installing ionizers to neutralize static electricity, or adding humidifiers in the workshop environment. However, carbon fibers are prone to surface oxidation in high humidity environments, and the effective range of ionizers is limited, typically less than 10 cm, making it difficult to cover the entire weaving area. Regarding the entanglement problem caused by fuzz, some companies optimize the surface roughness of the yarn guide (Ra≤0.2μm) or use a PTFE coating to reduce the coefficient of friction. However, this only delays fuzz formation and cannot fundamentally solve the problem of dynamic fiber separation during high-speed movement. Furthermore, the tension control system of traditional weaving machines mainly relies on mechanical damping or servo motor closed-loop control, resulting in a response lag time >50ms to sudden tension changes caused by fiber adhesion, further exacerbating weaving defects.

[0005] With the increasing demands for precision in carbon fiber preforms in fields such as aerospace (e.g., dimensional tolerances of Boeing 787 composite components ≤0.1mm / m) and the upgrading of weaving speeds to ultra-high-speed conditions exceeding 200 meters per minute, the limitations of existing technologies in addressing fiber electrostatic adhesion and fuzz entanglement are becoming increasingly apparent. Therefore, there is an urgent need to develop a dynamic control device capable of eliminating inter-fiber adhesion forces and promoting fuzz separation in real time, in order to achieve stable fiber bundle transport during high-speed weaving and fundamentally improve the quality and reliability of carbon fiber woven products. Utility Model Content

[0006] In view of this, this utility model proposes a circular vibration device and weaving assembly for a carbon fiber braiding machine. It optimizes the weaving process of carbon fiber bundles, reduces fiber friction and adhesion, ensures fiber uniformity and tension, improves weaving density and quality, and prevents fiber accumulation and jamming. This improves weaving quality and efficiency, increases economic benefits, and aims to solve some or all of the aforementioned technical problems.

[0007] To achieve the above objectives, the technical solution of this utility model is implemented as follows, specifically including two aspects:

[0008] On one hand, it relates to a circular vibration device for a carbon fiber braiding machine, including a vibration ring assembly, a connecting shaft, a fixed ring, a connecting bracket, and a vibration motor. The vibration ring assembly is mounted on the connecting shaft, which is connected to the fixed ring. The connecting bracket is connected to the fixed ring, and the vibration motor is mounted on the vibration ring assembly. The connecting bracket is connected to an external device.

[0009] In a structure that optimizes the aforementioned solution, the vibration ring assembly includes a vibration ring and vibration connecting rods. Several vibration connecting rods are evenly distributed on the vibration ring, and each connecting rod is correspondingly connected to a connecting shaft. Preferably, there are four vibration connecting rods. These four evenly distributed connecting rods form a more robust connection system, achieving a reliable rigid connection between the vibration ring and the connecting shaft. The four connecting rods can transmit the vibration energy generated by the vibration motor to the vibration ring evenly and efficiently from more directions, making the distribution of the annular uniform vibration field more balanced and stable. Mechanically, the four connecting rods are arranged in a cross or at equal angles, which better balances the complex centrifugal force generated during vibration, greatly avoiding eccentric vibration during device operation. This structure ensures that the fiber bundle receives more consistent and uniform vibration in the circumferential direction, effectively eliminating local fiber adhesion or fuzz entanglement problems. For large areas of carbon fiber filament weaving, it can improve the overall coverage and uniformity of the vibration effect, thereby optimizing the weaving effect and improving the weaving quality.

[0010] In a structure that optimizes the aforementioned solution, a rubber shock absorber is further included. The rubber shock absorber is mounted on the connecting shaft, and the vibrating connecting rod is connected to the connecting shaft via the rubber shock absorber. Preferably, the rubber shock absorber is a double-ended stud, with one end fixed to the connecting shaft and the other end locked to the vibrating connecting rod, and the rubber portion in the middle absorbs the vibration force. The rubber shock absorber isolates the rigid connection between the vibrating ring and the connecting shaft, and absorbs the high-frequency vibration energy generated by the vibrating motor through the rubber elastomer, preventing vibration from being transmitted to the fixed ring and external equipment (such as the weaving machine frame), thus reducing equipment resonance losses. At the same time, the rubber shock absorber allows the vibrating ring to float elastically within a certain range, adapting to the dynamic tension changes during fiber bundle movement, and preventing excessive stretching or breakage of the fiber bundle due to the rigid connection.

[0011] Furthermore, the vibration motor (37) is mounted on the vibration connecting rod (312) to drive the vibration ring to vibrate. Integrating the vibration motor directly onto the vibration connecting rod, the support structure of the vibration ring, shortens the vibration transmission path and improves the efficiency of vibration energy utilization. By driving the vibration ring with the motor to generate high-frequency micro-amplitude vibrations, the carbon fiber bundles are subjected to continuous dynamic separation forces as they pass through the vibration ring, disrupting electrostatic adsorption and fuzz entanglement between fibers, achieving real-time dispersion of the fiber bundles, and solving the problem of yarn channel blockage from the source.

[0012] In a structure that optimizes the aforementioned solution, all non-welded areas of the vibrating ring are polished, with a roughness Ra of 0.1, ensuring smooth fiber bundle weaving. Ultra-precision polishing reduces the surface friction coefficient of the vibrating ring, minimizing mechanical friction between the carbon fiber bundles and the ring surface, and suppressing the formation of new fuzz and static electricity accumulation caused by friction. The smooth surface prevents fiber filaments from snagging, and combined with vibration, achieves low-resistance sliding of the fiber bundle, ensuring stable yarn tension during weaving and improving the uniformity of the product structure.

[0013] In a structure that optimizes the aforementioned solution, a connecting block is also included. There are two fixed rings arranged in parallel, and the connecting block is disposed between the two fixed rings. The connecting shaft passes through the fixed rings and the connecting block.

[0014] Furthermore, the connecting shaft can slide within the connecting block and be locked with a set screw. The spacing can be flexibly adjusted based on actual vibration efficiency and fiber jamming rate, achieving dynamic matching. For different specifications of carbon fiber bundles (e.g., different ply numbers such as 1K / 3K / 6K) and weaving process parameters (e.g., weaving speed, yarn tension), the spacing between the vibrating ring and the weaving area is adjusted by sliding the connecting shaft, matching the vibration intensity with the fiber bundle motion state. For example, reducing the spacing during high-speed weaving enhances the vibration effect, while increasing the spacing during low-speed weaving avoids excessive vibration leading to fiber loosening, enabling the device to adaptively adjust to complex working conditions.

[0015] In a structure that optimizes the aforementioned solution, four connecting supports are evenly distributed on the fixed ring. This symmetrical, evenly distributed four-point support structure ensures the circular vibrating device maintains mechanical balance during high-speed vibration, preventing vibration efficiency attenuation due to installation eccentricity. The evenly distributed supports can uniformly transfer the weight of the device to the braiding machine frame, enhancing the overall structural rigidity, adapting to the dynamic loads during high-speed operation of the braiding machine, and preventing device displacement or loosening caused by vibration.

[0016] On the other hand, a braiding assembly is provided, using the circular vibration device of the carbon fiber braiding machine described in the aforementioned scheme. The assembly includes a braiding ring and two sets of circular vibration devices, fixed to both sides of the braiding ring by the connecting bracket. The vibration ring couplings of the two sets of circular vibration devices are arranged opposite to each other. The circular vibration devices are arranged front-to-back on both sides of the braiding ring to achieve forward and reverse braiding.

[0017] Compared to existing technologies, the circular vibration device and weaving assembly for the carbon fiber braiding machine described in this utility model effectively solve industry problems such as fiber adhesion, fuzz entanglement, and unstable tension during high-speed weaving through multi-dimensional structural innovation and functional synergy. Specific beneficial effects are as follows:

[0018] The vibrating ring connector uses a uniformly distributed vibrating connecting rod to create a uniform vibration field and achieve precise transmission of vibration energy. This breaks the electrostatic adsorption and tangling of fibers, significantly reducing the scrap rate under high-speed conditions and meeting the needs of ultra-high-speed weaving.

[0019] The device ensures smooth, low-resistance fiber bundle transport through ultra-smooth surface treatment and an adaptive adjustment mechanism. The surface of the vibrating ring is precision polished to effectively suppress fuzzing and static electricity accumulation, and the elastic connection structure ensures stable yarn tension. The sliding adjustment structure of the connecting shaft can dynamically adjust the vibration distance according to the fiber bundle specifications and weaving speed, achieving intelligent matching for complex working conditions.

[0020] The bidirectional symmetrical circular vibration device meets the high-precision weaving requirements of high-end products. Two sets of devices are symmetrically fixed on both sides of the weaving ring, forming a bidirectional vibration field that simultaneously eliminates electrostatic adsorption and entanglement of fibers moving in different directions. It is particularly suitable for the processing of symmetrical preforms in aerospace and other fields, ensuring uniform weaving density on both sides. The mechanical balance structure enhances the rigidity of the device and ensures long-term stable operation.

[0021] Intelligent control and process integration bring significant economic benefits. By dynamically adjusting vibration parameters and linking with the main controller, combined with real-time sensor feedback, closed-loop control is achieved, reducing manual debugging costs. Field tests show that the weaving efficiency and the uniformity of product structural strength are significantly improved after adopting this device, providing an efficient and reliable technical solution for the preparation of high-end composite material preforms. Attached Figure Description

[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0023] Figure 1 This is a schematic diagram of the circular vibration device structure of the carbon fiber braiding machine described in this utility model. Figure 1 .

[0024] Figure 2 This is a partial structural diagram of the vibration ring assembly of the circular vibration device for the carbon fiber braiding machine described in this utility model.

[0025] Figure 3 This is a schematic diagram of the structure of a braided bonding component according to the present invention.

[0026] Figure 4 This is a schematic diagram of the circular vibration device structure of the carbon fiber braiding machine described in this utility model. Figure 2 .

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Braided ring; 3. Circular ring vibration device; 31. Vibration ring connector; 311. Vibration ring; 312. Vibration connecting rod; 32. Rubber shock absorber; 33. Connecting shaft; 34. Connecting block; 35. Fixing ring; 36. Connecting bracket; 37. Vibration motor. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Example 1

[0034] A circular vibration device for a carbon fiber braiding machine, such as Figure 1 As shown, the assembly includes a vibration ring connector 31, a connecting shaft 33, a fixing ring 35, a connecting bracket 36, and a vibration motor 37. The vibration ring connector 31 consists of a vibration ring 311 and four evenly distributed vibration connecting rods 312. Each vibration connecting rod 312 is distributed at 90° intervals along the circumference of the vibration ring 311 and is fixedly connected to the vibration ring 311, forming a mechanically stable structure. The other end of each vibration connecting rod 312 is elastically connected to the connecting shaft 33 via a rubber shock absorber 32. The rubber shock absorber 32 is a double-ended stud structure; one end is threaded to the mounting hole of the connecting shaft 33, and the other end is locked to the vibration connecting rod 312 with a nut. The intermediate rubber damping layer absorbs the high-frequency vibration energy generated by the vibration motor 37.

[0035] The fixing ring 35 consists of two parallel annular metal parts with four connecting blocks 34 in the middle. The connecting shaft 33 passes through the sliding holes of the fixing ring 35 and the connecting blocks 34 and is locked in place by set screws. The vibration motor 37 is fixed to the outside of the vibration connecting rod 312, and its output shaft is perpendicular to the plane of the vibration ring 311, driving the vibration ring 311 to generate radial high-frequency vibration. The connecting bracket 36 consists of four evenly distributed components, one end of which is fixed to the outer periphery of the fixing ring 35, and the other end has a mounting hole for bolt connection with the braided ring 1. The non-welded area of ​​the vibration ring 311 is precision polished, and the surface roughness meets the requirements for low resistance fiber bundle passage.

[0036] Example 2

[0037] A braided combination component, such as Figure 3 As shown, the device includes the circular vibration device 3 and the braided ring 1 described in Embodiment 1. The circular vibration device 3 consists of two sets, symmetrically arranged on both sides of the braided ring 1. The fixing ring 35 of each set of circular vibration devices 3 is bolted to the support frame of the braided ring 1 through a connecting bracket 36. The vibration ring couplings 31 of the two sets of devices are arranged coaxially opposite each other, and the central axis of the vibration ring 311 coincides with the rotation axis of the braided ring 1.

[0038] The connecting bracket 36 adopts a four-point evenly distributed cantilever structure, and its installation angle ensures that the two sets of vibrating rings 311 are aligned with the yarn guide channels on both sides of the braiding ring 1. The distance between the vibrating rings 311 and the braiding ring 1 is adjusted by sliding the connecting shaft 33 within the connecting block 34 to adapt to the braiding requirements of different fiber bundle specifications. When the braiding machine is running, the two vibrating motors 37 synchronously drive the vibrating rings 311 to generate opposite phase vibrations, forming a bidirectional dynamic separation force field, effectively eliminating electrostatic adsorption and fuzz entanglement of circumferential and radial moving fiber bundles. The elastic support structure of the rubber shock absorber 32 allows the vibrating rings 311 to adaptively float when the fiber tension changes, avoiding fiber bundle damage caused by rigid contact.

[0039] In the above embodiments, the coaxiality of the two sets of vibration rings 311 is calibrated by a laser alignment instrument during device installation to ensure that the fiber bundles are subjected to uniform force during the weaving process.

[0040] When the circular vibration device or weaving assembly of the carbon fiber braiding machine is working, the various components cooperate to effectively control problems such as fiber adhesion, fuzz entanglement, and unstable tension during high-speed weaving. The specific working principle is as follows:

[0041] When the braiding machine starts, the carbon fiber bundles pass through the central hole of the vibrating ring 311 and move with the braiding ring 1. The vibrating motor 37 is synchronously energized, and its eccentric rotor rotates at high speed to generate high-frequency mechanical vibration. The vibration energy is transmitted to the vibrating ring 311 through the rigidly connected vibrating connecting rod 312. Since the four vibrating connecting rods are evenly distributed at 90° along the circumference of the ring to form a stable structure, the vibrating ring 311 generates uniform radial or circumferential micro-amplitude vibration, which applies a continuous dynamic separation force to the passing fiber bundles, effectively destroying the electrostatic adsorption and tangling of the fibers.

[0042] The rubber shock absorber 32 serves as an elastic connection unit. Its double-stud structure is fixed at one end to the connecting shaft 33, and the other end is locked to the vibration connecting rod 312 via a nut. The intermediate rubber damping layer absorbs the vibration energy generated by the vibration motor 37, preventing the vibration from being transmitted to the fixed ring 35 and the weaving machine frame. This concentrates the vibration on the vibration ring coupling 31, avoiding equipment resonance that could affect weaving accuracy. At the same time, the elastic deformation of the rubber layer allows the vibration ring 311 to float slightly when the fiber bundle tension changes, adapting to the dynamic stress state of the fiber bundle and preventing fiber tensile breakage caused by rigid contact.

[0043] The connecting shaft 33 passes through the sliding holes of the double parallel fixing rings 35 and the connecting block 34. The distance between the vibrating ring 311 and the weaving area can be adjusted axially by using a set screw. When processing fiber bundles of different specifications or adjusting the weaving speed, the operator can increase or decrease the distance according to the actual working conditions to match the vibration intensity with the fiber bundle motion state: reducing the distance during high-speed weaving enhances the vibration dispersion effect, while increasing the distance during low-speed weaving avoids excessive vibration that could cause the fibers to loosen, thus achieving adaptive adjustment of the device to complex processes.

[0044] Two sets of circular vibration devices are symmetrically fixed on both sides of the braided ring 1 via evenly distributed connecting brackets 36, with the vibration rings 311 arranged coaxially opposite each other. When the braiding machine is braiding in both directions, the vibration motors 37 on both sides synchronously drive the vibration rings to generate opposite or same-direction vibrations, forming a bidirectional dynamic force field that acts synchronously on the fiber bundles moving in the circumferential and radial directions. This eliminates electrostatic adsorption and fuzz entanglement generated when moving in different directions, ensuring that the fiber bundles are evenly distributed on the surface of the mandrel and avoiding accumulation and jamming.

[0045] In terms of intelligent control, the device integrates a tension sensor and a hairiness monitoring module to collect fiber bundle status signals in real time and transmit them to the main controller. The main controller dynamically adjusts the vibration frequency and amplitude of the vibration motor 37 according to a preset algorithm, forming a closed-loop control of "status monitoring - parameter adjustment - effect feedback". It can adapt to changes in working conditions without frequent manual adjustments, ensuring stable yarn tension and structural uniformity during weaving, and fundamentally improving the quality reliability and production efficiency of carbon fiber preforms.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circular vibration device for a carbon fiber braiding machine, characterized in that: It includes a vibration ring connector (31), a connecting shaft (33), a fixed ring (35), a connecting bracket (36), and a vibration motor (37). The vibration ring connector (31) is mounted on the connecting shaft (33), which is connected to the fixed ring (35). The connecting bracket (36) is connected to the fixed ring (35). The vibration motor (37) is mounted on the vibration ring connector (31), and the connecting bracket (36) is connected to an external device.

2. The circular vibration device for a carbon fiber braiding machine according to claim 1, characterized in that: The vibration ring assembly (31) includes a vibration ring (311) and vibration connecting rods (312). Several vibration connecting rods (312) are evenly distributed on the vibration ring (311), and the vibration connecting rods (312) are correspondingly connected to the connecting shaft (33).

3. The circular vibration device for a carbon fiber braiding machine according to claim 2, characterized in that: It also includes a rubber shock absorber (32), which is mounted on the connecting shaft (33), and the vibration connecting rod (312) is connected to the connecting shaft (33) through the rubber shock absorber (32).

4. The circular vibration device for a carbon fiber braiding machine according to claim 2, characterized in that: The vibration motor (37) is mounted on the vibration connecting rod (312).

5. The circular vibration device for a carbon fiber braiding machine according to claim 2, characterized in that: The roughness Ra of the vibration ring (311) is 0.

1.

6. The circular vibration device for a carbon fiber braiding machine according to claim 1, characterized in that: It also includes a connecting block (34), there are two fixing rings (35) arranged in parallel, the connecting block (34) is arranged between the two fixing rings (35), and the connecting shaft (33) passes through the fixing rings (35) and the connecting block (34).

7. The circular vibration device for a carbon fiber braiding machine according to claim 6, characterized in that: The connecting shaft (33) can slide in the connecting block (34) and be locked with a set screw.

8. The circular vibration device for a carbon fiber braiding machine according to claim 1, characterized in that: There are four connecting brackets (36), which are evenly distributed on the fixing ring (35).

9. A braided composite component, characterized in that: The circular vibration device of the carbon fiber braiding machine according to any one of claims 1-8 includes a braiding ring (1) and the circular vibration device (3). The circular vibration device (3) consists of two sets, which are fixed on both sides of the braiding ring (1) by the connecting bracket (36). The vibration ring connecting parts (31) of the two sets of circular vibration devices (3) are arranged opposite to each other.

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