Fiber Reinforced Composite Pultrusion Winding Yarn Tension Detection Device

Abstract

This invention solves the problem of long yarn paths affecting detection accuracy caused by the dispersed layout of the winding mechanism and tension detection mechanism. It relates to the field of tension detection technology, and particularly to a tension detection device for pultruded winding of fiber-reinforced composite materials. The device includes a frame, a turntable rotatably mounted on the frame, and a drive structure for rotating the turntable. Several yarn tensioning components are arranged circumferentially on the surface of the turntable. A mounting plate is located on the front side of the turntable. The turntable and mounting plate are coaxially arranged and both surround the outside of the product to be wound. The mounting plate and the turntable are connected by a connecting support. This invention integrates the frame, turntable, mounting plate, and three-pulley tension detection mechanism into a single rotating system, effectively shortening the yarn path. Furthermore, with the use of slip rings and carbon brushes, the power supply to the tension sensor and yarn tensioning components is cable-free.

Description

Technical Field

[0001] This invention relates to the field of tension detection technology, specifically to a tension detection device for winding yarn used in pultrusion winding of fiber-reinforced composite materials. Background Technology

[0002] With the development of fiber-reinforced composite materials, pultrusion winding technology is playing an increasingly important role in product molding. The winding machine used in pultrusion winding is responsible for completing the winding action. The winding machine is equipped with winding yarn, and the tension of the winding yarn needs to be controlled during unwinding.

[0003] In existing devices, the winding mechanism and tension detection mechanism are scattered, resulting in long yarn paths and large tension losses. At the same time, traditional tension detection components lack guiding structures, making the yarn prone to deviation and further reducing detection accuracy. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a tension detection device for winding yarn in pultrusion winding of fiber-reinforced composite materials, thereby solving the problem mentioned in the background art where the winding mechanism and tension detection mechanism are dispersed, resulting in a long yarn path that affects detection accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tension detection device for pultrusion winding of fiber-reinforced composite materials, comprising a frame base, a turntable and a drive structure for driving the turntable to rotate are rotatably mounted on the frame base, a plurality of yarn tensioning components are arranged circumferentially on the surface of the turntable, a mounting plate is provided on the front side of the turntable, the turntable and the mounting plate are coaxially arranged and both surround the outside of the product to be wound, the mounting plate and the turntable are connected by a connecting support, a plurality of three pulley tension detection mechanisms arranged in a ring are mounted on the mounting plate, the outer ends of the yarns on the yarn tensioning components pass through the three pulley tension detection mechanisms in an S-shape and are fixed to the product to be wound;

[0006] The three-pulley tension detection mechanism includes a fixed base detachably mounted on the front of the mounting plate. A tensioning wheel is mounted in the middle of the fixed base. Two guide rings located on both sides of the tensioning wheel are detachably mounted on the fixed base. A tension sensor is provided on the tensioning wheel. An adjustment component is mounted on the fixed base and rotatably connected to the shaft of the tensioning wheel. The adjustment component is used to adjust the position of the tensioning wheel on the fixed base along a straight line.

[0007] Preferably, the fixed base has a through groove, the width of which is the same as the diameter of the shaft through which the tensioning wheel passes, and the length of which is greater than the diameter of the shaft of the tensioning wheel.

[0008] Preferably, the adjusting assembly includes an internally threaded sleeve fitted on a fixed base, a threaded shaft extending into a through groove inserted along the internally threaded sleeve, an integrally formed connector at the end of the threaded shaft, the connector being T-shaped and rotatably fitted into the shaft body of the tensioning wheel, and a hexagonal head installed at the end of the threaded shaft away from the connector.

[0009] Preferably, a collar is embedded in the surface of the threaded shaft near the hexagonal head, and a scale is installed on the extended end of the collar surface, with the back of the scale fitting against the surface of the fixing seat.

[0010] Preferably, the front of the fixing seat has a limiting groove, the cross-section of the limiting groove is arranged in a T shape, and the extended end of the back of the scale is fitted into the limiting groove.

[0011] Preferably, when the shaft surface of the tensioning wheel is in contact with the inner wall of the through groove away from the inner threaded sleeve, the collar and the inner threaded sleeve are seamlessly fitted.

[0012] Preferably, a slip ring is installed on the surface of the turntable located on the rear side of the bracket, and a carbon brush is installed on the bracket extending from the top surface of the frame. The brush head of the carbon brush is in contact with the surface of the slip ring, and the slip ring is electrically connected to the yarn tensioning component and the tension sensor through a multi-core cable.

[0013] Preferably, the turntable includes an annular cylinder rotatably connected to a bracket extending from the top surface of the frame base. An annular plate is mounted on the front side of the annular cylinder, and the annular plate is fixed to the yarn tensioning assembly by screws. A gear ring is sleeved on the surface of the annular cylinder located on the front side of the bracket, and the gear ring meshes with the drive structure through tooth grooves.

[0014] By means of the above technical solution, the present invention provides a device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials, which has at least the following beneficial effects:

[0015] 1. This invention integrates yarn tensioning, tension detection, and winding actions into a single rotating system by integrating a frame, turntable, mounting plate, and three pulley tension detection mechanism. This effectively shortens the yarn path. In addition, by limiting yarn deviation through an S-shaped winding path, it solves the problems of asynchronous detection and winding and low accuracy caused by yarn deviation. At the same time, it can also realize dynamic monitoring of the tension of several yarns.

[0016] 2. By adjusting the position of the tensioning wheel, this invention can flexibly adapt to the characteristics and requirements of different yarns, ensuring that the yarn is always kept within the most suitable tension range, avoiding yarn breakage or excessive stretching, and improving the versatility and applicability of the equipment.

[0017] 3. When the tensioning wheel moves along the internal path of the through groove by rotating the threaded shaft, the scale moves synchronously so as to observe the corresponding values ​​on the scale at the edge of the fixed seat in real time, so that the position adjustment of the tensioning wheel has a quantitative indicator.

[0018] 4. This invention supplies power to the slip ring via a carbon brush, and then the slip ring supplies power to the tension sensor and the yarn tensioning assembly. Since the slip ring, tension sensor, and yarn tensioning assembly rotate synchronously with the turntable, and since the conductive ring of the slip ring rotates at high speed relative to the brush head of the carbon brush, the sliding contact between the graphite brush head and the conductive ring can still maintain conductive continuity. Therefore, it is possible to achieve un-tangled power supply to the yarn tensioning assembly and the tension sensor. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the installation structure of the turntable of the present invention;

[0022] Figure 3 This is a schematic diagram of the front structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the rear structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the three pulley tension detection mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the adjustment component of the present invention.

[0026] In the diagram: 1. Frame base; 2. Turntable; 201. Annular cylinder; 202. Annular plate; 203. Gear ring; 3. Drive structure; 4. Yarn tensioning assembly; 5. Mounting plate; 501. Connecting support; 6. Three-pulley tension detection mechanism; 601. Fixed base; 6011. Through groove; 6012. Limiting groove; 602. Tensioning wheel; 603. Guide ring; 604. Tension sensor; 605. Adjustment assembly; 6051. Internal threaded sleeve; 6052. Threaded shaft; 6053. Connecting head; 6054. Hexagonal head; 6055. Collar; 6056. Scale; 7. Product to be wound; 8. Current collector slip ring; 9. Carbon brush. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0028] Example 1

[0029] Please see Figures 1-6 This embodiment proposes a tension detection device for pultrusion winding of fiber-reinforced composite materials, which can dynamically detect the tension of the yarn during the pultrusion winding process. The tension detection device includes a frame 1 serving as the foundation for the device. A support extends vertically from the top surface of the frame 1, with a circular opening in the center to facilitate the insertion of the product 7 to be wound. A turntable 2 is rotatably mounted on the support extending from the top surface of the frame 1. A drive structure 3 for rotating the turntable 2 is installed inside the frame 1. Several yarn tensioning components 4 are arranged circumferentially on the surface of the turntable 2. The structure and operating principle of these yarn tensioning components are consistent with those in the prior art, and therefore will not be described in detail here. Their purpose is to enable the release and tensioning of the yarn. A mounting plate 5 is provided on the front side of the turntable 2. The turntable 2 and the mounting plate 5 are coaxially arranged and both surround the outside of the product 7 to be wound. The mounting plate 5 and the turntable 2 are detachably fixed together by multiple connecting supports 501, forming a whole, allowing the mounting plate 5 and its attached structure to rotate synchronously with the turntable 2. The mounting plate 5 is equipped with several three-pulley tension detection mechanisms 6 arranged in a ring, and the number of three-pulley tension detection mechanisms 6 is consistent with that of the yarn tensioning assembly 4.

[0030] Specifically, the turntable 2 includes an annular cylinder 201 rotatably connected to a bracket extending from the top surface of the frame 1. An annular plate 202 is mounted on the front of the annular cylinder 201, and the annular plate 202 is fixed to the yarn tensioning assembly 4 by screws. A gear ring 203 is fitted on the surface of the annular cylinder 201 located on the front side of the bracket, and the gear ring 203 meshes with the drive structure 3 through tooth grooves. The drive structure 3 itself can be composed of a servo motor, a gearbox, and a spur gear. Its spur gear part meshes with the gear ring 203 through tooth grooves. The motor serves as the drive source, and during operation, the annular plate 202 and the annular cylinder 201 are controlled to rotate at the same speed as the winding machine through the structural cooperation of the spur gear and the gear ring 203.

[0031] More specifically, the three-pulley tension detection mechanism 6 includes a fixed base 601 detachably mounted on the front of the mounting plate 5. A tensioning wheel 602 is mounted in the middle of the fixed base 601. Two guide rings 603 are detachably mounted on the fixed base 601, located on both sides of the tensioning wheel 602. A tension sensor 604 is provided on the tensioning wheel 602. An adjustment component 605 is mounted on the fixed base 601 and rotatably connected to the shaft of the tensioning wheel 602. The adjustment component 605 is used to adjust the position of the tensioning wheel 602 on the fixed base 601 along a straight line.

[0032] In practical applications, a matching yarn ball is selected according to the specifications of the product 7 to be wound and the requirements of the winding process. The yarn ball is installed on the yarn ball tensioning assembly 4 on the circumferential surface of the turntable 2. By adjusting the bolt structure inside the assembly, the yarn ball is kept slightly tensioned during rotation to prevent the yarn ball from loosening and causing yarn unwinding disorder. Then, the outer end of the yarn is led out from the yarn ball and passes through the outer guide ring 603, tensioning wheel 602 and inner guide ring 603 of the three pulley tension detection mechanism 6 in sequence, forming an S-shaped winding path. Finally, the outer end of the wound yarn is fixed at the starting winding point of the product 7 to be wound, and the yarn is manually pulled to apply slight force to the tensioning wheel 602. Then, the external control system is used to control the yarn ball according to the process requirements. The rotation speed of turntable 2 needs to be set. This is achieved by a servo motor in drive structure 3, which, through a reduction gearbox and spur gear drive ring 203, drives turntable 2 to rotate synchronously with mounting plate 5. Simultaneously, the pultrusion mechanism of the product to be wound 7 is activated, ensuring the product 7 maintains a set speed and moves axially. This movement, coordinated with the rotation of turntable 2, forms a spiral winding trajectory. During turntable 2's rotation, the yarn bundle is released synchronously. The yarn follows an S-shaped path through the three-pulley tension detection mechanism 6, continuously winding around the surface of the product 7. Tension sensor 604 on tension wheel 602 detects yarn tension in real time, and the tension sensor 604 uses wireless signal transmission. This highly integrated sensor incorporates a tension diaphragm, control chip, wireless transmission module, and signal transmitter, facilitating timely signal feedback.

[0033] Following the above, the yarn passes through the winding path of the three-pulley tension detection mechanism 6 in an S-shape, increasing the contact arc length between the yarn and the tensioning pulley 602. This allows the tension sensor 604 to more stably capture the yarn tension, reducing signal fluctuations caused by single-point contact. Simultaneously, the guide ring 603 restricts the lateral deviation of the yarn, preventing it from deviating from the tensioning pulley 602 due to the centrifugal force of the rotating turntable 2, thus ensuring consistent tension detection. Furthermore, the tension sensor 604 on the tensioning pulley 602 detects the yarn tension in real time, enabling dynamic monitoring.

[0034] Example 2

[0035] Because different yarns have different tension requirements, the fixed contact angle of the tensioning wheel 602 in the conventional setting can easily lead to excessive pressure applied by the tensioning wheel 602 when fine yarns come into contact, causing the tension sensor 604 to detect a falsely high value. Conversely, when coarse yarns come into contact, insufficient contact pressure makes the tension sensor 604 insensitive to minute tension changes, easily resulting in failure to capture tension variations. To avoid this problem, such as... Figure 1 , Figure 5 and Figure 6 As shown, based on Embodiment 1, this embodiment optimizes the structure of the adjustment component 605 of the three pulley tension detection mechanism 6 so that it can adjust the position of the tension wheel 602 as needed.

[0036] Specifically, the fixed base 601 has a through groove 6011. The width of the through groove 6011 is the same as the diameter of the shaft of the tension wheel 602 passing through the through groove 6011, and the length of the through groove 6011 is greater than the diameter of the shaft of the tension wheel 602. The adjusting assembly 605 includes an internally threaded sleeve 6051 fitted on the fixed base 601, a threaded shaft 6052 extending into the through groove 6011 inserted along the internally threaded sleeve 6051, and a connector 6053 integrally formed at the end of the threaded shaft 6052. The connector 6053 is T-shaped and rotatably fitted into the shaft of the tension wheel 602. A hexagonal head 6054 is installed at the end of the threaded shaft 6052 away from the connector 6053. In practical applications, as needed, a rotational force is applied to the hexagonal head 6054, causing the threaded shaft 6052 to rotate inward or outward along the internal threaded sleeve 6051. While adjusting the position of the end connector 6053, a pulling force towards the hexagonal head 6054 or a pushing force away from the hexagonal head 6054 is generated on the tension wheel 602. This causes the tension wheel 602 to drive the tension sensor 604 to change its position as needed, thereby adjusting the tension according to different yarn characteristics and operating conditions, so that the yarn is always kept within the most suitable tension range, avoiding yarn breakage or excessive stretching.

[0037] Example 3

[0038] Following the above embodiment two, as Figure 5 and Figure 6As shown, in this embodiment, a collar 6055 is embedded in the surface of the threaded shaft 6052 near the hexagonal head 6054. Under external force, the collar 6055 can only rotate along the unthreaded area of ​​the threaded shaft 6052, and cannot move axially along the threaded shaft 6052. A scale 6056 is mounted on the extended end of the collar 6055, and the back of the scale 6056 is in contact with the surface of the fixing seat 601. A limiting groove 6012 is formed on the front of the fixing seat 601. The limiting groove 6012 has a T-shaped cross-section, and the extended end of the scale 6056 on the back is fitted into the limiting groove 6012. When the threaded shaft 6052 controls the tensioning wheel 602 to move along the path of the through groove 6011, the scale 6056 can be driven to move along the same path via the collar 6055. The operator can quickly determine the current adjustment displacement of the tensioning wheel 602 by observing the corresponding values ​​on the scale 6056 and the edge of the fixed base 601, thus providing a quantifiable indicator for its position adjustment. Simultaneously, because the extended end of the scale 6056 on its back is engaged with the limiting groove 6012, the scale 6056 can only move, not rotate, ensuring that the back of the scale 6056 is always in contact with the front of the fixed base 601. This avoids data deviation caused by the scale 6056 deviating from its trajectory.

[0039] Specifically, when the shaft surface of the tensioning wheel 602 is in contact with the inner wall of the through groove 6011 away from the inner threaded sleeve 6051, the collar 6055 and the inner threaded sleeve 6051 are seamlessly connected, so that by rotating the threaded shaft 6052, the tensioning wheel 602 can move within the entire path range of the through groove 6011.

[0040] Example 4

[0041] Following the above embodiment one, as Figure 1 and Figure 2 As shown, in this embodiment, a slip ring 8 is installed on the surface of the turntable 2 located on the rear side of the support, and a carbon brush 9 is installed on the support extending from the top surface of the frame 1. The brush head of the carbon brush 9, made of high-purity graphite, is pressed tightly against the conductive ring surface of the slip ring 8 by a spring mechanism. The slip ring 8 is electrically connected to the yarn tensioning assembly 4 and the tension sensor 604 via a multi-core cable. While the drive structure 3 controls the rotation of the turntable 2, it drives the slip ring 8 to rotate synchronously, while the carbon brush 9 remains stationary. Current is transmitted from the brush head of the carbon brush 9 to the conductive ring portion of the rotating slip ring 8. Even if the conductive ring portion of the slip ring 8 rotates at high speed relative to the brush head of the carbon brush 9, the sliding contact between the graphite brush head and the conductive ring portion can still maintain continuous conductivity, achieving sliding contact conductivity. This provides a continuous power supply channel for the yarn tensioning assembly 4 and the tension sensor 604 on the turntable 2, achieving tangle-free power supply.

[0042] Example 5

[0043] The tension sensor 604 works in conjunction with the display and the early warning device, all three being wirelessly connected. The display shows the tension data sensed by each tension sensor 604 and compares this data with internally preset tension data. When the tension exceeds the upper or lower limits, the early warning device sounds an alarm to remind workers to take timely action.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials, comprising a frame (1), characterized in that: A turntable (2) and a drive structure (3) for driving the turntable (2) to rotate are rotatably mounted on the frame (1). Several yarn tensioning components (4) are arranged circumferentially on the surface of the turntable (2). A mounting plate (5) is provided on the front side of the turntable (2). The turntable (2) and the mounting plate (5) are arranged coaxially and both surround the outside of the product to be wound (7). The mounting plate (5) and the turntable (2) are connected by a connecting support (501). Several three-pulley tension detection mechanisms (6) arranged in a ring are installed on the mounting plate (5). The outer end of the yarn on the yarn tensioning component (4) passes through the three-pulley tension detection mechanism (6) in an S-shape and is fixed on the product to be wound (7). The three-pulley tension detection mechanism (6) includes a fixed seat (601) detachably mounted on the front of the mounting plate (5). A tension wheel (602) is mounted in the middle of the fixed seat (601). Two guide rings (603) located on both sides of the tension wheel (602) are detachably mounted on the fixed seat (601). A tension sensor (604) is provided on the tension wheel (602). An adjustment component (605) is mounted on the fixed seat (601) and rotatably connected to the shaft of the tension wheel (602). The adjustment component (605) is used to adjust the position of the tension wheel (602) on the fixed seat (601) along a straight line.

2. The device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials according to claim 1, characterized in that: The fixed base (601) has a through groove (6011). The width of the through groove (6011) is the same as the diameter of the shaft through which the tensioning wheel (602) passes. The length of the through groove (6011) is greater than the diameter of the shaft of the tensioning wheel (602).

3. The device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials according to claim 1, characterized in that: The adjusting assembly (605) includes an internal threaded sleeve (6051) fitted on a fixed base (601), a threaded shaft (6052) extending into a through groove (6011) inserted along the internal threaded sleeve (6051), a connector (6053) integrally formed at the end of the threaded shaft (6052), the connector (6053) being T-shaped and rotatably fitted into the shaft body of the tension wheel (602), and a hexagonal head (6054) installed at the end of the threaded shaft (6052) away from the connector (6053).

4. The device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials according to claim 3, characterized in that: The threaded shaft (6052) has a collar (6055) embedded in the surface near the hexagonal head (6054). A scale (6056) is installed on the extended end of the collar (6055), and the back of the scale (6056) is in contact with the surface of the fixing seat (601).

5. The device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials according to claim 4, characterized in that: The fixed base (601) has a limiting groove (6012) on its front side. The limiting groove (6012) has a T-shaped cross section. The extended end of the scale (6056) on the back side is fitted into the limiting groove (6012).

6. The device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials according to claim 4, characterized in that: When the shaft surface of the tensioning wheel (602) is in contact with the inner wall of the through groove (6011) away from the inner threaded sleeve (6051), the collar (6055) and the inner threaded sleeve (6051) fit seamlessly together.

7. The device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials according to claim 1, characterized in that: A slip ring (8) is installed on the surface of the turntable (2) located on the back side of the bracket. A carbon brush (9) is installed on the bracket extending from the top surface of the frame (1). The brush head of the carbon brush (9) is attached to the surface of the slip ring (8). The slip ring (8) is electrically connected to the yarn tensioning assembly (4) and the tension sensor (604) via a multi-core cable.

8. The device for detecting the tension of winding yarn for pultrusion winding of fiber-reinforced composite materials according to claim 1, characterized in that: The turntable (2) includes an annular cylinder (201) rotatably connected to a bracket extending from the top surface of the frame (1). An annular plate (202) is installed on the front side of the annular cylinder (201). The annular plate (202) is fixed to the yarn tensioning assembly (4) by screws. A gear ring (203) is sleeved on the surface of the annular cylinder (201) located on the front side of the bracket. The gear ring (203) meshes with the drive structure (3) through tooth grooves.

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