Carbon fiber multifilament cutting apparatus

Abstract

The utility model relates to carbon fiber manufacturing technical field especially carbon fiber multifilament cutting device. Traction feeding machinery, cutting machinery and cutting sample bar conveying machinery are sequentially arranged along multifilament processing direction, and are all installed in the machine table, and the multifilament conveying, cutting and sample bar directional output are realized in cooperation. As for cutting machinery, fixed cutter, cutter holder, guide assembly and power part are all installed based on bearing frame. Fixed cutter is opposite to multifilament feeding path, and movable cutter is fixed in cutter holder. Power part is in transmission connection with cutter holder, and drives cutter holder to execute reciprocating motion under the assistance of guide assembly, and movable cutter and fixed cutter can cut multifilament in cooperation. In this way, the vibration deviation phenomenon of each component in cutting machinery in the cutting process is effectively eliminated; the directional nature of cutter holder movement track is ensured by guide assembly, the accurate cooperation of movable cutter and fixed cutter is ensured, the problems such as cutting deviation and sample bar section roughness are avoided, and finally the strict requirements of mechanical test sample bar on precision and quality are satisfied.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber manufacturing technology, and in particular to a carbon fiber multifilament cutting device. Background Technology

[0002] In the fields of aerospace, new energy vehicles, and high-end equipment manufacturing, carbon fiber multifilament is widely used due to its advantages of high strength, lightweight, and corrosion resistance. During the production and manufacturing stage, in order to ensure the quality of the final product, carbon fiber multifilament needs to be cut into strips of specific lengths for subsequent mechanical property testing. Currently, there is no dedicated cutting equipment for carbon fiber multifilament in the domestic industry. In actual production, companies mostly use general-purpose cutting equipment or manual cutting. General-purpose cutting equipment, not specifically adapted to the material characteristics of carbon fiber multifilament, is prone to problems such as fiber pulling and loss of length accuracy during the cutting process, making it difficult to meet the core requirements of industrial production for sample consistency and reliability. Manual cutting is not only inefficient and difficult to match the pace of large-scale production, but its cutting quality also highly depends on the operator's experience, further restricting the stability of the production and testing processes. To avoid the above problems, a few companies with high quality requirements choose to import similar equipment from abroad. However, the purchase cost per unit is high, which greatly increases the company's initial equipment investment. In addition, the after-sales response cycle is long, which increases the risk of production interruption. Furthermore, existing cutting equipment (including some foreign equipment) still has obvious defects in its structural design: on the one hand, the cutting mechanism lacks a unified and stable installation foundation, and the core components are scattered, resulting in poor coordination between components. During long-term operation, the equipment is prone to positional displacement due to vibration, which directly affects the cutting accuracy; on the other hand, the compatibility between the fixed blade and the carbon fiber multifilament feeding path is insufficient, and the transmission method of the power unit and the execution unit is mostly linkage transmission, which has poor transmission stability and accuracy, further resulting in insufficient cutting force and low processing efficiency, making it difficult to meet actual production needs.

[0003] Therefore, it is urgent for technical personnel to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a carbon fiber multifilament cutting device, which aims to solve the problems of existing designs, such as the lack of a unified and stable foundation for the cutting mechanism, poor component coordination, unstable power transmission, and inability to meet the stringent requirements of mechanical testing for the accuracy of the sample, as well as low cutting efficiency.

[0005] This utility model relates to a carbon fiber multifilament cutting device, including a machine base, a traction feeding mechanism, a cutting mechanism, and a cutting strip conveying mechanism; The traction feeding machine, cutting machine, and cutting strip conveying machine are arranged in sequence along the carbon fiber multifilament processing direction to work together to realize the conveying, cutting, and directional output of carbon fiber multifilaments and cutting strips. All of them are installed on the machine base. The cutting machine includes a support frame, a fixed blade, a moving blade, a blade holder, a guide assembly, and a power unit; The fixed tool, tool holder, guide assembly, and power unit are all mounted on a support frame. The fixed blade is positioned on the feeding path of the carbon fiber multifilament; The moving blade is fixedly mounted on the tool holder; The power unit is connected to the cutter holder and, with the assistance of the guide assembly, drives the cutter holder to reciprocate in a preset direction. The moving cutter and the fixed cutter work together to cut the carbon fiber multifilaments on the feeding path into segments.

[0006] As a further improvement to the technical solution disclosed in this utility model, the power unit includes a geared motor, a coupling, a transmission shaft, a bearing housing, an eccentric wheel, a force transmission component, and a reset assembly; the output shaft of the geared motor is connected to one end of the transmission shaft via the coupling; the bearing housing is fixedly installed on the support frame; the transmission shaft passes through the inner hole of the bearing housing and rotates with its inner bearing, and is fixedly connected to the axis of the eccentric wheel; one end of the force transmission component abuts against the outer circumferential surface of the eccentric wheel, and the other end is fixedly connected to the side wall of the tool holder; the reset assembly is adapted to the tool holder and is used to provide reset power to the tool holder during the rotation of the eccentric wheel; when the geared motor does work, the eccentric wheel rotates synchronously with the transmission shaft, and the eccentric wheel pushes the force transmission component during rotation, while the reverse reset action of the reset assembly is assisted, driving the tool holder to reciprocate along a preset direction.

[0007] As a further improvement to the technical solution disclosed in this utility model, the top contact end of the force transmission component is provided with an arc-shaped force-bearing surface that matches the radius of curvature of the outer circumferential surface of the eccentric wheel.

[0008] As a further improvement to the technical solution disclosed in this utility model, the reset component includes a first spring and a second spring; both the first spring and the second spring are connected between the support frame and the tool holder, and their axes are parallel to the preset reciprocating motion direction of the tool holder; when the moving tool moves towards the fixed tool, the first spring and the second spring are stretched synchronously and store elastic potential energy; when the eccentric wheel no longer applies a thrust to the force transmission component, the first spring and the second spring release the stored elastic potential energy synchronously to jointly pull the tool holder to reset away from the fixed tool, completing one reciprocating motion cycle.

[0009] As a further improvement to the technical solution disclosed in this utility model, the guide assembly includes two sets of parallel guide rails and guide sliders; the guide rails are arranged along the preset reciprocating motion direction of the tool holder and are fixed together with the support frame; the guide sliders correspond one-to-one with the guide rails and are in clearance sliding fit, and are fixed together with the tool holder.

[0010] As a further improvement to the technical solution disclosed in this utility model, the cutting machine also includes an antistatic nozzle; the antistatic nozzle is mounted on a support frame and is connected to an external ion air generator through an air pipe, and is used to spray ion air onto the carbon fiber multifilaments on the feeding path.

[0011] In practical applications, the carbon fiber multifilament cutting equipment disclosed in this utility model can achieve at least the following beneficial technical effects, specifically: 1) The cutting machine uses a support frame as a unified installation base and integrates the fixed blade, blade holder, guide assembly, and power unit, providing stable support for each core component and reducing the occurrence of positional deviation caused by vibration. Furthermore, the power unit is connected to the blade holder and the guide assembly constrains the reciprocating motion trajectory of the blade holder, thereby ensuring the precise coordination between the moving blade and the fixed blade, avoiding cutting deviation and rough cross-section, and improving the stability of power transmission, meeting the stringent requirements of mechanical test specimens for accuracy and quality. 2) The traction feeding machine, cutting machine, and cutting strip conveying machine work together to form a continuous operation process. The traction feeding machine stably conveys the multifilament to the cutting area. After the cutting machine completes the precise cutting, the cutting strip conveying machine immediately guides it out in an oriented manner, which effectively improves the cutting and processing efficiency of carbon fiber multifilament. Moreover, the unified machine base ensures the relative positional accuracy of the traction feeding machine, cutting machine, and cutting strip conveying machine, avoiding coordination deviations caused by scattered installation, and ensuring the precise connection of the multifilament feeding process, cutting process, and conveying process. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional schematic diagram from one perspective of the carbon fiber multifilament cutting equipment disclosed in this utility model.

[0014] Figure 2 This is a three-dimensional schematic diagram from another perspective of the carbon fiber multifilament cutting equipment disclosed in this utility model.

[0015] Figure 3 This is a three-dimensional schematic diagram of the cutting machinery in the carbon fiber multifilament cutting equipment disclosed in this utility model from one perspective.

[0016] Figure 4 This is a three-dimensional schematic diagram of the cutting machinery in the carbon fiber multifilament cutting equipment disclosed in this utility model from another perspective.

[0017] Figure 5 This is a three-dimensional schematic diagram of the power unit in the carbon fiber multifilament cutting equipment disclosed in this utility model (the moving blade, blade holder and guide assembly are all shown in the form of double-dotted lines).

[0018] Figure 6 This is a three-dimensional schematic diagram of the power unit in the carbon fiber multifilament cutting equipment disclosed in this utility model from another perspective (the moving blade, blade holder and guide assembly are all shown in the form of double-dotted lines).

[0019] Figure 7 yes Figure 5 The front view.

[0020] Figure 8 yes Figure 7 AA sectional view.

[0021] Figure 9 This is a three-dimensional schematic diagram of the force transmission component in the carbon fiber multifilament cutting equipment disclosed in this utility model.

[0022] 1-Machine base; 2-Traction feeding mechanism; 3-Cutting mechanism; 31-Support frame; 32-Fixed blade; 33-Moving blade; 34-Blade holder; 35-Guide assembly; 351-Guide slide rail; 352-Guide slider; 36-Power unit; 361-Gear motor; 362-Coupling; 363-Drive shaft; 364-Bearing housing; 365-Eccentric wheel; 366-Force transmission component; 3661-Arc-shaped force-bearing surface; 367-Reset assembly; 3671-First spring; 3672-Second spring; 37-Antistatic nozzle; 4-Cutting strip conveying mechanism. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 , Figure 2Two perspective views of the carbon fiber multifilament cutting equipment disclosed in this utility model are shown, revealing that it mainly consists of a machine base 1, a traction feeding mechanism 2, a cutting mechanism 3, and a cutting strip conveying mechanism 4. The traction feeding mechanism 2, the cutting mechanism 3, and the cutting strip conveying mechanism 4 are arranged sequentially along the carbon fiber multifilament processing direction to collaboratively achieve the conveying, cutting, and directional output of the carbon fiber multifilaments. All three are detachably fixed to the machine base 1. This effectively avoids the coordination deviation problems caused by the dispersed installation of the traction feeding mechanism 2, the cutting mechanism 3, and the cutting strip conveying mechanism 4, ensuring precise connection between the multifilament feeding process, the cutting process, and the conveying process, thus laying a good foundation for improving the cutting efficiency of carbon fiber multifilaments. like Figure 3 , Figure 4 As shown, the cutting machine 3 mainly consists of a support frame 31, a fixed blade 32, a moving blade 33, a blade holder 34, a guide assembly 35, and a power unit 36. The fixed blade 32, blade holder 34, guide assembly 35, and power unit 36 ​​are all mounted on the support frame 31. The support frame 31 provides stable support, reducing positional shifts caused by vibration and laying a structural foundation for subsequent precise cutting. The fixed blade 32 is positioned on the feeding path of the carbon fiber multifilament, forming a cutting benchmark; the moving blade 33 is fixedly mounted on the blade holder 34 to move synchronously with it. The power unit 36 ​​is connected to the blade holder 34 and, with the assistance of the guide assembly 35, drives the blade holder 34 to reciprocate along a preset direction. The moving blade 33 and the fixed blade 32 work together to cut the carbon fiber multifilament on the feeding path into segments, ensuring cutting accuracy and cross-sectional quality through structural design.

[0024] Similarly, Figure 3 , Figure 4 As shown, the guide assembly 35 plays a crucial role in constraining the movement trajectory of the cutter holder 34. It consists of two sets of parallel guide rails 351 and guide sliders 352. The guide rails 351 are arranged along the preset reciprocating motion direction of the cutter holder 34 and are fixed to the support frame 31 to form a stable guiding reference. The guide sliders 352 correspond one-to-one with the guide rails 351 and are in a sliding fit with clearance, and are fixed to the cutter holder 34. In practical applications, the precise cooperation between the guide rails 351 and the guide sliders 352 effectively limits the movement direction of the cutter holder 34, preventing the cutter holder 34 from deviating or wobbling during reciprocating motion, ensuring that the moving cutter 33 and the fixed cutter 32 always maintain precise alignment, and further improving cutting accuracy.

[0025] It should also be noted that the clearance between the guide rail 351 and the guide slider 352 is controlled within the range of 0.02 to 0.05 mm to effectively avoid problems such as cutting offset and rough cross-section, thereby meeting the stringent accuracy requirements of mechanical test specimens. like Figures 5-8 As shown, the power unit 36 ​​serves as the drive source and consists of several parts, including a geared motor 361, a coupling 362, a transmission shaft 363, a bearing housing 364, an eccentric wheel 365, a force transmission component 366, and a reset assembly 367. The output shaft of the geared motor 361 is connected to one end of the transmission shaft 363 via a coupling 362 to achieve efficient power transmission. The bearing housing 364 is fixedly installed on the support frame 31 to provide stable support for the transmission shaft 363. The transmission shaft 363 passes through the inner hole of the bearing housing 364 and rotates with its inner bearing. It is also fixedly connected to the axial position of the eccentric wheel 365 to ensure that the eccentric wheel 365 rotates synchronously with the transmission shaft 363. One end of the force transmission component 366 abuts against the outer circumferential surface of the eccentric wheel 365, and the other end is fixedly connected to the side wall of the tool holder 34, thereby realizing the transmission of power from the eccentric wheel 365 to the tool holder 34. The reset component 367 is adapted to the tool holder 34 to provide reset power for the tool holder 34 during the rotation of the eccentric wheel 365. When the geared motor 361 is working, the eccentric wheel 365 rotates synchronously with the transmission shaft 363. During the rotation, the eccentric wheel 365 pushes the force transmission component 366, and at the same time, with the reverse reset action of the reset component 367, it drives the knife holder 34 to reciprocate along the preset direction, and finally realizes the continuous cutting action. As Figure 9 As shown, the top contact end of the force transmission component 366 is provided with an arc-shaped force-receiving surface 3661 that matches the radius of curvature of the outer circumferential surface of the eccentric wheel 365. In this way, the contact area between the force transmission component 366 and the eccentric wheel 365 can be effectively increased, avoiding component wear caused by localized rapid wear. At the same time, it ensures smoother thrust transmission when the eccentric wheel 365 rotates, reduces impact during power transmission, improves the overall operational stability and service life of the power unit 36, and reduces operating costs. To ensure the continuity and stability of the movement of the cutter holder 34, avoid cutting deviations caused by uneven restoring force, and further guarantee cutting accuracy, as a further optimization of the above technical solution, such as... Figures 5-7 As shown, the reset assembly 367 includes a first spring 3671 and a second spring 3672. Both the first spring 3671 and the second spring 3672 are connected between the support frame 31 and the tool holder 34, and their axes are parallel to the preset reciprocating motion direction of the tool holder 34, forming a symmetrical reset structure. In practical applications, when the moving tool 33 moves towards the fixed tool 32, the first spring 3671 and the second spring 3672 are simultaneously stretched and store elastic potential energy; when the eccentric wheel 365 no longer applies a pushing force to the force transmission component 366, the first spring 3671 and the second spring 3672 simultaneously release the stored elastic potential energy to jointly pull the tool holder 34 away from the fixed tool 32, completing one reciprocating motion cycle.

[0026] According to industry common sense, carbon fiber multifilaments are prone to static electricity generation due to friction during transport, which may cause the multifilaments to shift, inevitably affecting the feeding stability. Therefore, as a further optimization of the above technical solution, the cutting machine 3 is also equipped with an antistatic nozzle 37. The antistatic nozzle 37, also mounted on the support frame 31, is connected to an external ion air generator (not shown in the figure) via an air pipe, and is used to spray ion air onto the carbon fiber multifilaments along the feeding path. The ion air sprayed by the antistatic nozzle 37 can quickly neutralize the static electricity on the surface of the multifilaments, ensuring that the multifilaments always maintain a flat and straight transport state, providing a good foundation for precise cutting.

[0027] It should also be noted that both the fixed blade 32 and the moving blade 33 are made of cemented carbide and have undergone precision grinding to ensure the sharpness and wear resistance of the blades, extend the service life of the blades, and reduce the burrs on the multifilament fibers during the cutting process, thus meeting the stringent requirements of mechanical test specimens for cross-sectional quality. During operation, after the carbon fiber multifilament is fed into the feeding path of the cutting machine 3 by the traction feeding machine 2, the antistatic nozzle 37 first sprays ion air to neutralize the static electricity of the multifilament, ensuring a stable feeding state. Subsequently, the power unit 36 ​​starts, and the reduction motor 361 drives the transmission shaft 363 to rotate through the coupling 362. The transmission shaft 363 drives the eccentric wheel 365 to rotate, and the eccentric wheel 365 pushes the force transmission component 366. Under the constraint of the guide component 35, the cutter holder 34 drives the moving blade 33 to move closer to the fixed blade 32. The two work together to cut the multifilament into segments. After cutting, the first spring 3671 and the second spring 3672 release elastic potential energy, pulling the cutter holder 34 back to its original position, ready for the next cutting. At the same time, the cut sample conveying machine 4 guides the cut sample out in an oriented manner. The entire operation process is coherent, with seamless connection between traction feeding, cutting, and sample conveying, effectively improving the cutting efficiency of carbon fiber multifilament. The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon fiber multifilament cutting device, characterized in that, This includes machine tools, traction feeding machinery, cutting machinery, and cutting strip conveying machinery; The traction feeding machine, the cutting machine, and the cutting strip conveying machine are arranged sequentially along the carbon fiber multifilament processing direction to collaboratively realize the conveying, cutting, and directional output of the carbon fiber multifilament and the cutting strip, and are all installed on the machine platform. The cutting machine includes a support frame, a fixed blade, a moving blade, a blade holder, a guide assembly, and a power unit; The fixed blade, the blade holder, the guide assembly, and the power unit are all mounted on the support frame. The fixed blade is positioned on the feeding path of the carbon fiber multifilament; The moving blade is fixedly mounted on the blade holder; The power unit is connected to the cutter holder and, with the assistance of the guide assembly, drives the cutter holder to reciprocate along a preset direction. The moving cutter and the fixed cutter work together to cut the carbon fiber multifilaments on the feeding path into segments.

2. The carbon fiber multifilament cutting equipment according to claim 1, characterized in that, The power unit includes a geared motor, a coupling, a drive shaft, a bearing housing, an eccentric wheel, a force transmission component, and a reset assembly. The output shaft of the geared motor is connected to one end of the drive shaft via the coupling. The bearing housing is fixedly mounted on the support frame. The drive shaft passes through the inner hole of the bearing housing and rotates with its inner bearing, and is fixedly connected to the axial center of the eccentric wheel. One end of the force transmission component abuts against the outer circumferential surface of the eccentric wheel, and the other end is fixedly connected to the side wall of the tool holder. The reset assembly is adapted to the tool holder and is used to provide reset power to the tool holder during the rotation of the eccentric wheel. When the geared motor performs work, the eccentric wheel rotates synchronously with the drive shaft. During the rotation, the eccentric wheel pushes the force transmission component, and with the counter-reset action of the reset assembly, it drives the tool holder to reciprocate in a preset direction.

3. The carbon fiber multifilament cutting equipment according to claim 2, characterized in that, The top contact end of the force transmission component is provided with an arc-shaped force-bearing surface that matches the radius of curvature of the outer circumference of the eccentric wheel.

4. The carbon fiber multifilament cutting equipment according to claim 2, characterized in that, The reset assembly includes a first spring and a second spring; both the first spring and the second spring are connected between the support frame and the tool holder, and their axes are parallel to the preset reciprocating motion direction of the tool holder; when the moving tool moves towards the fixed tool, the first spring and the second spring are stretched synchronously and store elastic potential energy; when the eccentric wheel no longer applies a thrust to the force transmission component, the first spring and the second spring release the stored elastic potential energy synchronously to jointly pull the tool holder away from the fixed tool and reset it, completing one reciprocating motion cycle.

5. The carbon fiber multifilament cutting equipment according to claim 1, characterized in that, The guiding assembly includes two sets of parallel guide rails and guide sliders; the guide rails are arranged along the preset reciprocating motion direction of the tool holder and are fixed together with the support frame; the guide sliders correspond one-to-one with the guide rails and are in a sliding fit with clearance, and are fixed together with the tool holder.

6. The carbon fiber multifilament cutting equipment according to any one of claims 1-5, characterized in that, The cutting machine also includes an antistatic nozzle; the antistatic nozzle is mounted on the support frame and is connected to an external ion air generator through an air pipe, and is used to spray ion air onto the carbon fiber multifilaments in the feeding path.

Images