Carbon fiber unwinding equipment and control method thereof

Abstract

The invention discloses a carbon fiber pay-off device and a control method thereof.The carbon fiber pay-off device comprises a pay-off frame and a pay-off shaft used for being connected with a yarn cylinder in a sleeved mode, a non-twist guide wheel assembly and a twisting guide wheel assembly are arranged between the pay-off frame and the pay-off shaft, and a carbon fiber tow can selectively pass through the non-twist guide wheel assembly or the twisting guide wheel assembly for pay-off. According to the device, a twisting yarn releasing path and a non-twisting yarn releasing path are formed in the device, so that twisting processing and non-twisting processing can be conducted on carbon fiber tows through one yarn releasing device, switching between the twisting processing technology and the non-twisting processing technology can be conducted on line, the adjusting difficulty of the carbon fiber processing technology is reduced, and the processing efficiency is improved. And the carbon fiber production efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon fiber, and specifically relates to a carbon fiber wire feeding device and a control method thereof. Background Art

[0002] With the substantial improvement of domestic carbon fiber production capacity, the output of ordinary carbon fiber has far exceeded the demand of ordinary civil use. At the same time, due to the monopoly of high-quality carbon fiber precursor by foreign countries and the confidentiality of the production process of high-quality carbon fiber precursor, it is urgent for our country to develop a production process and equipment for carbon fiber precursor with higher strength. Therefore, in the prior art, the carbon fiber precursor is usually twisted during the wire feeding process. For example, multiple strands of carbon fiber precursor are woven into a carbon fiber rope by twisting, thereby greatly improving the strength, elastic modulus and other properties of the carbon fiber during use.

[0003] The Chinese invention patent with the application number 201711438302.7 discloses a carbon fiber rope manufacturing device and equipment, wherein the carbon fiber rope manufacturing device includes: a single-strand twisting mechanism, a multi-strand twisting mechanism and a positioning mechanism, wherein: the single-strand twisting mechanism twists the carbon fiber filament bundle by self-rotation to form a single-strand twisted wire; at least two of the single-strand twisting mechanisms are arranged on the multi-strand twisting mechanism; the positioning mechanism is arranged above the single-strand twisting mechanism; the multi-strand twisting mechanism drives the single-strand twisting mechanism to rotate around a common axis, and the single-strand twisted wire is gathered and fixed at a point through the positioning mechanism to form a multi-strand twisted rope. The carbon fiber rope manufacturing device provided by the invention twists and winds the carbon fiber filament bundle through the single-strand twisting mechanism and the multi-strand twisting mechanism, so that the strength modulus of the carbon fiber filament bundle remains unchanged; it avoids the messy wire at both ends of the yarn bobbin when a single carbon fiber filament bundle is twisted during the twisting process; and it increases the strength of the carbon fiber rope.

[0004] However, this equipment is only used for producing twisted carbon fiber filament bundles, and the carbon fiber filament bundle passes through the guide eye fixed outside the filament bobbin to complete the twisting process, so this equipment cannot realize the switching between the two processes of non-twisting and twisting.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a carbon fiber wire feeding device to achieve the purpose of implementing two processes of twisting treatment and non-twisting treatment on carbon fiber precursor through the same equipment.

[0007] Another purpose of the present invention is also to provide a control method applied to the above carbon fiber wire feeding device to achieve the purpose of eliminating defects such as easy relaxation and winding of the filament bundle during the wire feeding process of the carbon fiber.

[0008] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A carbon fiber wire feeding device includes a wire feeding frame and a wire feeding shaft for sleeving a wire bobbin. An untwisted guide wheel assembly and a twisted guide wheel assembly are provided between the wire feeding frame and the wire feeding shaft. The carbon fiber wire bundle can be selectively fed through the untwisted guide wheel assembly or the twisted guide wheel assembly.

[0010] Further, the twisted guide wheel assembly includes a first guide wheel located on the extension line of the central axis of the wire feeding shaft, which is used to guide the carbon fiber to be twisted during the wire feeding process.

[0011] The untwisted guide wheel assembly includes a fifth guide wheel provided on the perpendicular bisector of the wire feeding shaft, which is used to guide the carbon fiber to be fed without twist along the tangent direction of the wire bobbin.

[0012] Further, the twisted guide wheel assembly further includes a second guide wheel, a third guide wheel and a fourth guide wheel arranged in sequence on the same straight line as the first guide wheel, and the intervals between adjacent guide wheels gradually decrease from the first guide wheel to the fourth guide wheel.

[0013] The carbon fiber bypasses from the side of the first, second and third guide wheels facing away from the wire feeding frame and the side of the fourth guide wheel facing the wire feeding frame in sequence, and is twisted during the wire feeding process.

[0014] Further, the untwisted guide wheel assembly further includes a sixth guide wheel provided at the midpoint of the connection line between the fifth guide wheel and the fourth guide wheel.

[0015] The carbon fiber is directly wound from the wire bobbin along the tangent direction to the side of the fifth guide wheel facing away from the sixth guide wheel, then wound from the sixth guide wheel to the side of the second guide wheel facing away from the sixth guide wheel, and then passes through the third and fourth guide wheels in sequence for untwisted wire feeding.

[0016] Further, it further includes: a wire guiding swing arm, which is installed at the end of the wire feeding shaft and extends radially from the axis of the wire feeding shaft to the outer peripheral side of the wire bobbin, and can rotate freely around the wire feeding shaft.

[0017] A wire hanging ring is provided at the end of the wire guiding swing arm on the outer peripheral side of the wire bobbin.

[0018] Further, the wire hanging ring is arranged in a spiral shape with the head and tail disconnected, and the extension length is at least one and a half weeks.

[0019] Further, the wire feeding shaft is arranged vertically, and the wire guiding swing arm is arranged at the top of the wire feeding shaft.

[0020] The first, second, third and fourth guide wheels are arranged in sequence from right to left horizontally above the wire guiding swing arm, and the fifth and sixth guide wheels are arranged on the left side of the wire feeding shaft.

[0021] After passing through the wire hanging ring, the carbon fiber is wound around the first guide pulley above, and successively bypasses above the first, second, and third guide pulleys and below the fourth guide pulley, enabling twisting during the wire feeding process.

[0022] Alternatively, the carbon fiber is directly wound from the wire bobbin along the tangent direction to the left side of the fifth guide pulley, then bypasses above the sixth guide pulley to above the second and third guide pulleys, and then passes below the fourth guide pulley, enabling twist-free wire feeding.

[0023] Furthermore, the wire feeding shaft is arranged horizontally, and the wire guiding swing arm is arranged at the left end of the wire feeding shaft;

[0024] The first, second, third, and fourth guide pulleys are arranged vertically from bottom to top in sequence on the left side of the wire guiding swing arm, and the fifth and sixth guide pulleys are arranged on the upper side of the wire feeding shaft;

[0025] After passing through the wire hanging ring, the carbon fiber is wound around the first guide pulley on the left side, and successively bypasses the left sides of the first, second, and third guide pulleys and the right side of the fourth guide pulley, enabling twisting during the wire feeding process.

[0026] Alternatively, the carbon fiber is directly wound from the wire bobbin along the tangent direction to the right side of the fifth guide pulley, then bypasses above the sixth guide pulley to the left sides of the second and third guide pulleys, and then passes through the right side of the fourth guide pulley, enabling twist-free wire feeding.

[0027] Furthermore, it further includes a tension pulley, which can float up and down between the fifth guide pulley and the sixth guide pulley in the vertical direction and is located between the second guide pulley and the third guide pulley in the horizontal direction.

[0028] The present invention also provides a control method for a carbon fiber wire feeding device. The wire feeding device further includes a motor drivingly connected to the wire feeding shaft and a frequency conversion device electrically connected to the motor;

[0029] The control method includes: during the process of twist-added wire feeding, controlling the frequency conversion device to adjust the rotation speed of the motor to correspond to the number of twists of the carbon fiber;

[0030] During the process of twist-free wire feeding, obtaining the moving distance of the tension pulley and adjusting the rotation speed of the motor according to the moving distance.

[0031] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art.

[0032] 1. Slip the carbon fiber filament bobbin over the wire feeding shaft. Drive the wire feeding shaft to rotate through a motor for wire feeding. Meanwhile, arrange a wire guiding swing arm extending in the radial direction at the end of the wire feeding shaft, and arrange a wire hanging loop at one end of the wire guiding swing arm that overhangs the outer periphery of the bobbin. Guide the carbon fiber raw filament to be released along the axial direction of the bobbin through the wire hanging loop, which can not only prevent the carbon fiber raw filament from tangling around the outer periphery of the bobbin but also enable the carbon fiber raw filament to complete single-strand twisting treatment.

[0033] 2. By arranging a guide wheel assembly, the carbon fiber wire feeding equipment forms two wire feeding paths, namely a twisting path and a non-twisting path, inside the equipment, enabling the implementation of two processes, i.e., twisting treatment and non-twisting treatment, on the carbon fiber filament bundle using one wire feeding equipment. And by setting the wire hanging loop as a spiral shape, it is possible to switch between the twisting and non-twisting treatment processes without breaking the wire, reducing the adjustment difficulty of the carbon fiber treatment process and improving the production efficiency of carbon fiber.

[0034] 3. Realize the alternating change of the winding distance between the guide wheel assemblies for the carbon fiber, avoiding the carbon fiber filament bundle from directly slackening on the circumferential side of the bobbin due to the rotation of the wire feeding shaft during wire feeding, which may cause the carbon fiber to wind and knot on the bobbin. At the same time, it can also adjust the wire feeding tension, reduce the variation range of the wire feeding tension, and improve the stability of the quality of the carbon fiber raw filament.

[0035] The following further describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0037] Figure 1 is a schematic diagram of a carbon fiber wire feeding equipment of the present invention.

[0038] Among them: 10, wire guiding swing arm; 20, wire hanging loop; 30, wire feeding frame; 40, guide wheel assembly; 41, first guide wheel; 42, second guide wheel; 43, third guide wheel; 44, fourth guide wheel; 45, fifth guide wheel; 46, sixth guide wheel; 47, tension wheel; 50, motor; 51, wire feeding shaft; 52, bobbin; 60, power supply; 70, frequency conversion device.

[0039] It should be noted that these drawings and the text description are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "contact", and "communication" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] As Figure 1 shown, in the embodiment of the present invention, the carbon fiber wire feeding device includes a motor and a wire feeding shaft for sleeving a wire bobbin.

[0044] A guide wheel assembly with several guide wheels is arranged between the wire feeding frame and the wire feeding shaft. Among them, the guide wheels are located in different orientations of the wire feeding shaft and can have different effects on the wire feeding process.

[0045] Specifically, the carbon fiber tow can be fed along specific guide wheels in the guide wheel assembly to form two types of combinations: a non-twisting guide wheel assembly and a twisting guide wheel assembly. The carbon fiber tow can be selectively fed through either the non-twisting guide wheel assembly or the twisting guide wheel assembly.

[0046] The twisting guide wheel assembly includes a first guide wheel located on the extension line of the central axis of the wire feeding shaft, which is used to guide the carbon fiber to be twisted during the wire feeding process. The non-twisting guide wheel assembly includes a fifth guide wheel arranged on the perpendicular bisector of the wire feeding shaft, which is used to guide the carbon fiber to be fed without twist along the tangent direction of the wire bobbin.

[0047] In this embodiment, two wire feeding paths, twisting and non-twisting, are formed inside the device, enabling the use of one wire feeding device to perform two processes of twisting treatment and non-twisting treatment on the carbon fiber tow, enabling the on-line switching between the twisting and non-twisting treatment processes, reducing the adjustment difficulty of the carbon fiber treatment process, and improving the production efficiency of carbon fiber.

[0048] As Figure 1As shown, in another embodiment of the present invention, a guide wheel assembly of a carbon fiber wire feeding device is introduced.

[0049] The guide wheel assembly includes a first guide wheel, a second guide wheel, a third guide wheel, and a fourth guide wheel arranged on the same straight line. In addition, the intervals between adjacent guide wheels gradually decrease from the first guide wheel to the fourth guide wheel.

[0050] The first guide wheel is arranged on the extension line of the central axis of the wire feeding shaft. After the carbon fiber passes through the wire hanging ring, it successively bypasses the sides of the first, second, and third guide wheels facing away from the wire hanging ring and the side of the fourth guide wheel facing the wire hanging ring, and enters the twisted wire feeding path.

[0051] In another embodiment, the guide wheel assembly further includes a fifth guide wheel and a sixth guide wheel.

[0052] The fifth guide wheel is located on the perpendicular bisector of the wire feeding shaft. The connection line between the fifth guide wheel and the third guide wheel is perpendicular to the perpendicular bisector of the wire feeding shaft. The sixth guide wheel is arranged at the midpoint of the connection line between the fifth guide wheel and the fourth guide wheel.

[0053] Thus, the carbon fiber directly winds from the filament bobbin to the side of the fifth guide wheel facing away from the sixth guide wheel along the tangent direction, then winds from the sixth guide wheel to the side of the second guide wheel facing away from the sixth guide wheel, and then successively passes through the third and fourth guide wheels and enters the untwisted wire feeding path.

[0054] In particular, the carbon fiber wire feeding device further includes a wire guiding swing arm installed at the end of the wire feeding shaft. The wire guiding swing arm extends radially from the axis of the wire feeding shaft to the outer peripheral side of the filament bobbin and can freely rotate around the wire feeding shaft. A wire hanging ring is installed at the end of the wire guiding swing arm that extends over the outer peripheral side of the filament bobbin.

[0055] Specifically, the wire guiding swing arm is installed at the end of the wire feeding shaft protruding from the filament bobbin. One end of the wire guiding swing arm is rotatably connected to the wire feeding shaft through a bearing, and the other end is provided with a wire hanging ring. The wire guiding swing arm extends radially from the axis of the wire feeding shaft to the outer periphery of the filament bobbin.

[0056] In another embodiment, the wire hanging ring is set as a spiral line with staggered head and tail. In this way, the carbon fiber bundle can be directly stuffed into the round hole of the wire hanging ring from the discontinuous part of the wire hanging ring, so that the carbon fiber bundle can be adjusted from the twisted wire feeding path to the untwisted wire feeding path without cutting the carbon fiber bundle.

[0057] Preferably, the extension length of the wire hanging ring in the spiral direction is at least more than 1.5 times the circumference of the circle.

[0058] In this embodiment, by setting the wire hanging ring as a spiral line, the switching between the twisted and untwisted processing processes can be realized without breaking the line, the adjustment difficulty of the carbon fiber processing process is reduced, and the production efficiency of the carbon fiber is improved.

[0059] In addition, the wire unwinding shaft is drivingly connected to the motor. For example, the output shaft of the motor and the wire unwinding shaft are driven by bevel gears.

[0060] The bobbin is sleeved on the wire unwinding shaft, and twisting is performed by driving the bobbin to rotate around its axis. When starting to unwind the wire, the output shaft rotates to drive the wire unwinding shaft to rotate through the bevel gears. The bobbin rotates with the wire unwinding shaft for wire unwinding and twisting. The carbon fiber raw wire passes through the wire hanging ring and is conveyed to the wire unwinding frame.

[0061] Furthermore, a tray is provided on the wire unwinding shaft. When the bobbin is sleeved on the wire unwinding shaft, the tray can support the bobbin and keep the bobbin concentric with the wire unwinding shaft, preventing the bobbin from slipping off the wire unwinding shaft.

[0062] In this embodiment, the carbon fiber bobbin is sleeved on the wire unwinding shaft, and the wire is unwound by driving the wire unwinding shaft to rotate through the motor. At the same time, a wire guiding swing arm extending in the radial direction is provided at the end of the wire unwinding shaft, and a wire hanging ring is provided at one end of the wire guiding swing arm that overhangs the outer circumference of the bobbin. The carbon fiber raw wire is guided by the wire hanging ring to be released along the axis direction of the bobbin, which not only avoids the entanglement of the carbon fiber raw wire on the outer circumference of the bobbin but also enables the carbon fiber raw wire to complete the single-strand twisting process.

[0063] As Figure 1 shown, in another embodiment of the present invention, a carbon fiber wire unwinding device capable of preventing the carbon fiber tow from loosening on the circumferential side of the bobbin is introduced.

[0064] The carbon fiber wire unwinding device includes a wire unwinding frame provided above the bobbin, which is used to convey the unwound carbon fiber to the carbonization line. The wire unwinding frame can change the conveying direction of the vertically upward carbon fiber raw wire to facilitate entry into subsequent processing equipment, such as an oxidation furnace.

[0065] Specifically, a guide wheel assembly is further provided between the wire unwinding frame and the wire unwinding shaft. The carbon fiber tow is released along the axial direction of the bobbin and guided to the wire unwinding frame through the guide wheel assembly, forming a wire unwinding path for twisting the carbon fiber tow in the carbon fiber wire unwinding device.

[0066] Specifically, the carbon fiber tow is gradually released from the bobbin along the axis direction of the bobbin at a certain speed. At the same time, the wire unwinding shaft drives the bobbin to rotate around its own central axis, and the released carbon fiber tow is twisted for twisting.

[0067] Furthermore, the carbon fiber wire unwinding device further includes a frequency conversion device and a power supply electrically connected to the motor. According to the requirement of the number of twists for the produced product, during the process of twisting and unwinding the wire, the rotation speed of the motor is controlled to correspond to the number of twists.

[0068] For example, according to different types of carbon fiber: 1K, 3K, 6K, 12K, the number of twists of the carbon fiber raw wire is changed by adjusting the rotation speed of the motor, so that the carbon fiber has better strength and increases the service life of the carbon fiber.

[0069] Alternatively, the carbon fiber tow is discharged tangentially along the filament cylinder and guided to the wire laying frame through the guide wheel assembly, forming a wire laying path in the carbon fiber wire laying equipment without twisting the carbon fiber tow.

[0070] In another embodiment of the present invention, a wire laying shaft of a carbon fiber wire laying equipment is introduced.

[0071] As Figure 1 shown, the wire laying shaft is arranged vertically. The motor has its output shaft directly connected to the wire laying shaft.

[0072] The motor is arranged below the wire laying shaft. The wire guiding rocker arm is arranged at the top of the wire laying shaft.

[0073] The first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are arranged in sequence from right to left horizontally above the wire guiding rocker arm, and are used to introduce carbon fiber into the twisted wire laying path.

[0074] Correspondingly, the fifth guide wheel and the sixth guide wheel are arranged on the left side of the wire laying shaft and are used for untwisted wire laying of carbon fiber.

[0075] Specifically, after the carbon fiber passes through the wire hanging ring, it winds around the upper first guide wheel. Then it bypasses above the first guide wheel, the second guide wheel and the third guide wheel in sequence, and below the fourth guide wheel, and enters the twisted wire laying path.

[0076] Alternatively, the carbon fiber is directly wound from the filament cylinder tangentially to the left side of the fifth guide wheel. Then it winds above the sixth guide wheel, above the second guide wheel and the third guide wheel, and then passes below the fourth guide wheel to enter the untwisted wire laying path.

[0077] In another embodiment of the present invention, another wire laying shaft of a carbon fiber wire laying equipment is introduced.

[0078] The wire laying shaft is arranged horizontally. The motor has its output shaft directly connected to the wire laying shaft. The motor is installed at the right end of the wire laying shaft. The wire guiding rocker arm is arranged at the left end of the wire laying shaft.

[0079] The first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are arranged in sequence from bottom to top vertically on the left side of the wire guiding rocker arm, and are used to introduce carbon fiber into the twisted wire laying path.

[0080] Correspondingly, the fifth and sixth guide wheels are arranged on the upper side of the wire laying shaft and are used for untwisted wire laying of carbon fiber.

[0081] Specifically, the carbon fiber passes through the wire hanging ring and is wound around the first guide wheel on the left side, and then passes around the left side of the first guide wheel, the second guide wheel, and the third guide wheel, and the right side of the fourth guide wheel in turn, and enters the twisted wire release path.

[0082] Alternatively, the carbon fiber is directly wound from the yarn tube to the right side of the fifth guide wheel along the tangential direction, then wound from above the sixth guide wheel to the left side of the second guide wheel and the third guide wheel, and then passes through the right side of the fourth guide wheel to enter the untwisted release path.

[0083] like Figure 1 As shown, in another embodiment of the present invention, a tension wheel for stabilizing the tension of carbon fiber unwinding equipment is introduced.

[0084] The guide wheel assembly further includes a tension wheel. The tension wheel is located between the second guide wheel and the third guide wheel in the horizontal direction. In addition, the tension wheel can float up and down between the fifth guide wheel and the sixth guide wheel in the vertical direction to adjust the tension of the wire release.

[0085] Specifically, during the unwinding process, the weight of the wire drum is constantly reduced, and the carbon fiber is affected by the weight of the wire drum, and the tension required for unwinding varies greatly. When the carbon fiber is wound and transported, the up and down floating of the tension wheel is used to achieve the alternating change of the winding distance of the carbon fiber between the guide wheel assemblies, so as to avoid the carbon fiber bundle being directly relaxed on the side of the wire drum due to the rotation of the unwinding shaft during the unwinding process, causing the carbon fiber to be entangled and knotted on the wire drum. At the same time, the tension of unwinding can be adjusted to reduce the variation of the unwinding tension and improve the stability of the quality of the carbon fiber raw yarn.

[0086] The present invention also provides a control method for a carbon fiber unwinding device. The carbon fiber unwinding device comprises a frequency conversion device electrically connected to the motor, and is used to adjust the number of revolutions of the unwinding shaft per unit time.

[0087] The control method comprises: according to the twist number requirement of the production product, during the twisting and releasing process, controlling the frequency conversion device to adjust the speed of the motor to correspond to the twist number.

[0088] In another embodiment, the carbon fiber is adjusted along the tangential direction from the yarn tube directly to the side of the fifth guide wheel away from the sixth guide wheel, and then from the sixth guide wheel to the side of the second guide wheel away from the sixth guide wheel, and then passes through the third and fourth guide wheels in sequence to enter the untwisted wire release path.

[0089] Then, during the process of untwisted unwinding, the moving distance of the tension wheel is obtained, and the number of revolutions of the motor is adjusted according to the moving distance. For example, when it is obtained that the interval between the tension wheel and the second guide wheel increases, the number of revolutions of the motor is controlled to be reduced to avoid the unwinding shaft rotating too fast and the carbon fiber being loosened around the filament tube.

[0090] In this embodiment, the rotation speed of the motor is controlled by a frequency conversion device, which can not only adjust the number of twists of the carbon fiber during the twisting and wire feeding process, but also control the wire feeding speed during the untwisted wire feeding process, eliminating defects such as easy relaxation and entanglement of the fiber bundle during the wire feeding process of the carbon fiber.

[0091] The above are only preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of the present invention can make some changes or modifications to equivalent embodiments with equivalent changes by using the technical content prompted above within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the scope of the present invention.

Claims

1. A carbon fiber wire feeding device, comprising a wire feeding frame (30) and a wire feeding shaft (51) for sleeving a wire bobbin (52), characterized in that, An untwisted guide wheel assembly and a twisted guide wheel assembly are provided between the wire feeding frame (30) and the wire feeding shaft (51), and the carbon fiber filament bundle can be selectively fed through the untwisted guide wheel assembly or the twisted guide wheel assembly.

2. The carbon fiber wire feeding device according to claim 1, wherein The twisted guide wheel assembly includes a first guide wheel (41) located on the extension line of the central axis of the wire feeding shaft (51), which is used to guide the carbon fiber to be twisted during wire feeding. The untwisted guide wheel assembly includes a fifth guide wheel (45) provided on the perpendicular bisector of the wire feeding shaft (51), which is used to guide the carbon fiber to be fed without twist along the tangent direction of the wire bobbin (52).

3. A carbon fiber wire feeding device according to claim 2, characterized in that, The twisted guide wheel assembly further includes a second guide wheel (42), a third guide wheel (43) and a fourth guide wheel (44) arranged in sequence on the same straight line as the first guide wheel (41), and the interval between adjacent guide wheels gradually decreases from the first guide wheel (41) to the fourth guide wheel (44). The carbon fiber sequentially bypasses from the side of the first, second, and third guide wheels away from the wire feeding frame (30) and the side of the fourth guide wheel (44) facing the wire feeding frame (30), and is twisted during wire feeding.

4. The carbon fiber wire feeding device according to claim 3, wherein, The untwisted guide wheel assembly further includes a sixth guide wheel (46) provided at the midpoint of the connection line between the fifth guide wheel (45) and the fourth guide wheel (44). The carbon fiber is directly wound from the wire bobbin (52) along the tangent direction to the side of the fifth guide wheel (45) away from the sixth guide wheel (46), then wound from the sixth guide wheel (46) to the side of the second guide wheel (42) away from the sixth guide wheel (46), and then passes through the third and fourth guide wheels in sequence for untwisted wire feeding.

5. A carbon fiber wire feeding device according to any one of claims 1-4, characterized in that, It further includes: A wire guiding swing arm (10), which is installed at the end of the wire feeding shaft (51) and extends radially from the axis of the wire feeding shaft (51) to the outer peripheral side of the wire bobbin (52), and can rotate freely around the wire feeding shaft (51). A wire hanging ring (20), which is arranged at the end of the wire guiding swing arm (10) on the outer peripheral side of the wire bobbin (52).

6. The carbon fiber wire feeding device according to claim 5, characterized in that, The wire hanging ring (20) is arranged in a spiral shape with the head and tail disconnected, and the extension length is at least one and a half turns.

7. A carbon fiber wire feeding device according to claim 6, characterized in that, The wire feeding shaft (51) is arranged in the vertical direction, and the wire guiding swing arm (10) is arranged at the top of the wire feeding shaft (51). The first, second, third, and fourth guide wheels are arranged in sequence from right to left in the horizontal direction above the wire guiding swing arm (10), and the fifth and sixth guide wheels are arranged on the left side of the wire feeding shaft (51). The carbon fiber passes through the wire hanging ring (20) and is wound around the upper first guide wheel (41), and sequentially bypasses from above the first, second, and third guide wheels and below the fourth guide wheel (44), and can be twisted during wire feeding. Or, the carbon fiber is directly wound from the wire bobbin (52) along the tangent direction to the left side of the fifth guide wheel (45), then wound from above the sixth guide wheel (46) to above the second and third guide wheels, and then passes through below the fourth guide wheel (44) for untwisted wire feeding.

8. The carbon fiber wire feeding device according to claim 6, wherein, The wire feeding shaft (51) is arranged in the horizontal direction, and the wire guiding swing arm (10) is arranged at the left end of the wire feeding shaft (51). The first, second, third and fourth guide wheels are arranged in sequence from bottom to top on the left side of the wire guide rocker arm (10) along the vertical direction, and the fifth and sixth guide wheels are arranged on the upper side of the wire release shaft (51); After passing through the wire hanging ring (20), the carbon fiber is wound around the first guide wheel (41) on the left side, and then passes around the left sides of the first, second and third guide wheels and the right side of the fourth guide wheel (44) in sequence, and twisted during the wire laying process; Alternatively, the carbon fiber is directly wound from the yarn tube (52) to the right side of the fifth guide wheel (45) along the tangential direction, then wound from above the sixth guide wheel (46) to the left side of the second and third guide wheels, and then passed through the right side of the fourth guide wheel (44) to perform untwisted yarn release.

9. A carbon fiber wire feeding device according to any one of claims 6-8, characterized in that, It also includes a tension wheel (47) which can float up and down between the fifth guide wheel (45) and the sixth guide wheel (46) in the vertical direction, and is located between the second guide wheel (42) and the third guide wheel (43) in the horizontal direction.

10. A control method for a carbon fiber wire feeding device, characterized in that, The wire-releasing device further comprises a motor (50) drivingly connected to the wire-releasing shaft (51) and a frequency conversion device (70) electrically connected to the motor (50); The control method comprises: in the process of twisting and releasing the fiber, controlling the frequency conversion device (70) to adjust the number of revolutions of the motor (50) to correspond to the number of twists of the carbon fiber; During the process of untwisted unwinding, the moving distance of the tension wheel (47) is obtained, and the number of revolutions of the motor (50) is adjusted according to the moving distance.

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