Variable speed servo wire spooling device

Abstract

The application discloses a variable-speed follow-up wire winding and unwinding device, and relates to the technical field of automatic composite material manufacturing. The application solves the problems that the winding and unwinding speed synchronization is difficult to control during the winding and unwinding process of the wire, and the rotating speed of the winding roller is invariable.

Description

Technical Field

[0001] This application relates to the field of automated manufacturing technology for composite materials, specifically to a variable speed follow-up wire winding and unwinding device. Background Technology

[0002] Currently, automated manufacturing of composite materials involves many wire manufacturing scenarios. In the manufacturing of wires such as carbon fiber prepreg tow, there is a strong demand for wire winding and unwinding. During these processes, the wire emerging from the unwinding roller must be evenly and smoothly wound back onto the winding roller. During winding and unwinding, the diameter of the winding roller continuously increases while the diameter of the unwinding roller continuously decreases, causing a continuous change in the wire's linear speed. To achieve the desired winding and unwinding effect, the key is to ensure the synchronization of the wire's linear speed during the winding and unwinding processes.

[0003] In existing technologies, the main solutions for wire winding and unwinding applications are as follows: a servo motor is typically used to drive the winding roller, and a wire tension detection device and a wire speed detection device are set on the wire transmission circuit, along with a controller, to accurately detect and control the wire tension and wire speed in order to achieve automatic wire winding. However, this solution has disadvantages such as complex design, high implementation cost, and high control requirements. Summary of the Invention

[0004] The main objective of this application is to provide a variable speed follow-up wire winding and unwinding device, which aims to solve the problem of high cost caused by the need to set up devices for detecting the winding and unwinding speed and accurate wire tension detection devices in the existing technology during the winding and unwinding process.

[0005] The technical solution adopted in this application is as follows:

[0006] A variable speed follow-up wire winding and unwinding device includes an unwinding roller, a tension detection roller unit, a tension adjusting roller unit, and a winding roller, wherein:

[0007] The tension adjusting roller unit includes a drive roller and a differential guide roller assembly. Several differential guide roller assemblies are arranged alternately in the transverse direction, and the height difference between any differential guide roller assembly located at a high position and any differential guide roller assembly located at a low position is the same. The drive roller drives the differential guide roller assembly to rotate. The unwinding roller unwinds the wire sequentially through the tension detection unit, the differential guide roller assembly, and then to the take-up roller.

[0008] Optionally, the differential guide roller assembly includes a spinning apron, a guide roller, and an isolation block. The isolation block is kept fixed, the guide roller is rotatably disposed on the front side of the isolation block, and the spinning apron is sleeved on the common envelope surface formed by the guide roller and the isolation block.

[0009] Optionally, the spinning apron rotates relative to the guide roller and the spacer block.

[0010] Optionally, the bottom end of the guide roller is flush with the bottom end of the isolation block, and the orthogonal projection area of ​​the guide roller on the isolation block is smaller than the area of ​​the projection surface.

[0011] Optionally, the inner circumference of the spinning apron is greater than the outer circumference of the guide roller and the outer circumference of the isolation block.

[0012] Optionally, the guide roller is mounted on a rotating shaft, and a transmission component is mounted on the rotating shaft. The drive roller is connected to the transmission component via a transmission belt.

[0013] Optionally, the linear velocity of the drive roller is greater than the linear velocity of the take-up roller.

[0014] Optionally, the tension detection roller unit includes a directional guide roller and a floating roller, with one directional guide roller on each side of the floating roller, and the floating roller moves up and down longitudinally.

[0015] Optionally, the floating roller moves along the vertical line of the line connecting the two directional guide rollers.

[0016] Optionally, the highest floating point of the floating roller does not exceed the horizontal plane where the directional guide roller is located.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] This application proposes a variable-speed follow-up wire winding and unwinding device. By setting a tension adjusting roller unit, it automatically controls the wire tension between itself and the winding roller to be close to zero, ensuring that the wire is uniformly and smoothly rewound onto the winding roller. This device can realize the automatic winding and unwinding function of wire, and at the same time, it allows the winding roller speed to change within a certain range during the winding and unwinding process, achieving a variable-speed follow-up effect. The entire device has a simple structure, low cost, and does not require a complex electrical control system to realize the automatic winding and unwinding of wire. It has good feasibility, economy and reliability, and solves the problem of difficulty in controlling the synchronization of winding and unwinding speeds during the winding and unwinding process, and the problem of the winding roller rotation speed being invariable. Attached Figure Description

[0019] Figure 1 A schematic diagram of the variable speed follower wire winding and unwinding device provided in an embodiment of this application from one view.

[0020] Figure 2 A schematic diagram of the tension adjusting roller unit in the variable speed follow-up wire winding and unwinding device provided in the embodiment of this application, viewed from one angle.

[0021] Figure 3A schematic diagram of the slip guide roller assembly in the variable speed follow-up wire winding and unwinding device provided in the embodiment of this application, viewed from one angle.

[0022] Figure 4 This is a schematic diagram of the force analysis of the slip guide roller assembly.

[0023] Explanation of the labels in the attached drawings:

[0024] 1-Unwinding roller, 2-Tension detection roller unit, 21-Directional guide roller, 22-Floating roller, 3-Tension reduction roller unit, 31-Drive roller, 32-Transmission chain belt, 33-Slip differential roller assembly, 331-Spinning apron, 332-Guide roller, 333-Separator block, 4-Take-up roller. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0029] See attached document Figure 1 This application provides a variable speed follow-up wire winding and unwinding device, including an unwinding roller 1, a tension detection roller unit 2, a tension adjustment roller unit 3, and a winding roller 4. The unwinding roller 1, the tension detection roller unit 2, the tension adjustment roller unit 3, and the winding roller 4 are arranged in a straight line. In use, the wire is first unwound and coiled on the unwinding roller 1, then passes through the multiple sets of slip guide rollers 332 assemblies of the tension detection roller unit 2 and the tension adjustment roller unit 3 in sequence, and finally the wire end is fixed on the winding roller 4. The winding roller 4 serves as the power roller for winding the wire. When the winding roller 4 rotates actively, the wire is released from the unwinding roller 1, passes through the tension detection roller unit 2 and the tension adjustment roller unit 3 in sequence, and is rewound back onto the winding roller 4.

[0030] In this embodiment, see Figure 1 As shown, the unwinding roller 1 is a passively driven roller, mounted on a rotating shaft via bearings. Under the action of the take-up roller 4, the unwinding roller 1 can rotate freely around its axis to release the wire. The take-up roller 4 is a powered roller, fixedly mounted on a rotating shaft. This shaft can be connected to a rotary drive motor via a coupling. Driven by the rotary drive motor, the take-up roller 4 rotates synchronously with its shaft. As is conventional, both the unwinding roller 1 and the take-up roller 4 are well-known technologies in the art, and therefore will not be described in detail here.

[0031] In this embodiment, see Figure 1 As shown, the tension detection roller unit 2 includes a directional guide roller 21 and a floating roller 22. There are two directional guide rollers 21, positioned at the same horizontal height and spaced apart. The floating roller 22 is positioned between the two directional guide rollers 21 and can move along the vertical line connecting the two directional guide rollers 21. Figure 1As can be seen, after the wire is released from the unwinding roller 1, it reaches the tension detection roller unit 2. When passing through the tension detection roller unit 2, the wire passes around the directional guide roller 21 on the side closest to the unwinding roller 1, then around the floating roller 22, and finally exits from the directional guide roller 21 on the other side. The wire passes through the tension detection roller unit 2 in a V-shape, thus achieving the purpose of tensioning the wire. However, it should be noted that the weight of the floating roller 22 will not break the wire. It can be imagined that the weight of the floating roller 22 can control the tension of the conveyed wire. When the tension of the conveyed wire increases, the floating roller 22 rises vertically along the longitudinal direction under the action of the wire tension. When the tension reaches the maximum value, the floating roller 22 floats to the upper limit position. When the conveyed wire suddenly breaks, the speed of the winding roller 4 drops to zero, or there is no material on the unwinding roller, the wire tension drops to the minimum value, and the floating roller 22 sinks to the lower limit position. This is understandable. To provide early warning of maximum and minimum tension values ​​and promptly alert users to the limits of wire tension, an upper limit switch is installed at the upper limit position of the floating roller 22, and a lower limit switch is installed at the lower limit position. When the tension of the conveyed wire reaches its maximum value, the floating roller 22 rises to its upper limit position and triggers the upper limit switch to issue an excessive tension signal. When the conveyed wire experiences a sudden breakage, the winding roller 4's speed drops to zero, or the unwinding roller has no material, the floating roller 22 sinks to its lower limit position and triggers the lower limit switch to issue an insufficient tension signal. It is important to note that the floating roller 22's maximum rising position must not be higher than the horizontal plane of the directional guide roller 21, and when the floating roller 22 is at its highest limit position, it should be at the same height as the two directional guide rollers 21, with all three aligned.

[0032] In one embodiment, to achieve the self-floating and sinking of the floating roller 22, one implementation method is as follows: a guide plate is installed on the vertical line connecting the two directional guide rollers 21. The guide plate is provided with a guide groove along the longitudinal direction, and baffles are provided at both ends of the guide groove. The baffles limit the upper and lower strokes of the floating roller 22. The floating roller 22 itself is rotatably mounted on a rotating shaft through a bearing. A slider is integrally formed at the end of the rotating shaft. The slider slides in the guide groove without falling off. At the same time, the upper stroke limit switch and the lower stroke limit switch can be installed on the inner side of the baffles on both sides to facilitate contact with the slider, thereby indicating the tension limit of the wire.

[0033] In this embodiment, see Figure 1 As shown, the tension adjusting roller unit 3 includes a drive roller 31 and a slip guide roller 332 assembly. Multiple sets of slip guide roller 332 assemblies are arranged in a staggered, vertically interleaved manner along the transverse side. The spacing between adjacent slip guide roller 332 assemblies is equal. Simultaneously, the arrangement of the slip guide roller 332 assemblies must ensure that the height difference between any slip guide roller 332 assembly located at a higher position and any slip guide roller 332 assembly located at a lower position is the same. Figure 1As shown, after the wire is led out from the tension detection roller unit 2, it passes around each slip guide roller 332 assembly from right to left, and the wire travels in a wave-like shape between the slip guide roller 332 assemblies.

[0034] Specifically, see Figure 2 and Figure 3 As shown, the slip guide roller 332 assembly includes a spinning apron 331, a guide roller 332, and a spacer block. The spacer block is fixed and has a through hole. The guide roller 332 is positioned on the front of the spacer block, and a rotating shaft is fixedly mounted at the center of the guide roller 332. The rotating shaft passes through the through hole into the spacer block, and a transmission component is fixedly mounted on the rotating shaft. The transmission component, the rotating shaft, and the guide roller 332 rotate synchronously. The drive roller 31 is also fixedly connected to a rotating shaft, which is connected to a drive motor via a coupling. The drive roller 31 is connected to the transmission component containing the guide roller 332 via a transmission chain belt 32. An additional tensioning mechanism is provided to keep the transmission chain belt 32 connected to each transmission component, ensuring that the drive roller 31 and each guide roller 332 rotate synchronously. Simultaneously, the linear speed of the drive roller 31 is greater than the linear speed of the take-up roller 4 to ensure that the yarn can be smoothly wound up without slack. Furthermore, as... Figure 3 As shown, in this embodiment, the spinning apron 331 is fitted onto the common envelope surface formed by the guide roller 332 and the isolation block. The bottom end of the guide roller 332 is flush with the bottom end of the isolation block, and the orthographic projection area of ​​the guide roller 332 on the isolation block is smaller than the area of ​​the projection surface. Furthermore, the inner diameter circumference of the spinning apron 331 is greater than the outer diameter circumference of the guide roller 332 and the outer diameter circumference of the isolation block. Thus, the spinning apron 331 is fitted onto the common envelope surface formed by the guide roller 332 and the isolation block, and the spinning apron 331 rotates relative to the guide roller 332 and the isolation block.

[0035] As can be understood from the above content, combined with Figures 1 to 4 As shown, the tension regulating roller unit 3 is used to realize automatic following of the linear speed of the wire. The wire to be rewound passes from the unwinding roller 1 through the tension detection roller unit 2 and the tension regulating roller unit 3 through multiple sets of slip guide rollers 332 and onto the take-up roller 4. When the take-up linear speed generated at the maximum diameter of the take-up roller 4 increases, the linear speed of the wire at the contact point with the wire in the tension regulating roller unit 3 tends to increase. At this time, the tension of the wire increases, which increases the positive pressure of the wire on the spinning apron 331 and the guide roller 332. This further increases the friction between the wire and the spinning apron 331 and the guide roller 332. At this time, the friction between the spinning apron 331 and the wire is a pair of interaction forces, which also increase. The increased friction will drive the wire to accelerate forward until the linear speed of the wire at the contact point of the guide roller 332 is close to the linear speed.

[0036] Conversely, when the winding speed generated at the maximum diameter of the take-up roller 4 decreases, the linear speed of the wire at the contact point with the wire in the relative tension regulating roller unit 3 tends to decrease. At this time, the tension of the wire decreases, which reduces the positive pressure of the wire on the spinning apron 331 and the guide roller 332. This further reduces the friction between the wire and the spinning apron 331 and the guide roller 332. At this time, the friction between the spinning apron 331 and the wire is a pair of interacting forces, which also decreases. The decrease in friction reduces the force that drives the wire to accelerate forward, until the linear speed of the wire at the contact point with the guide roller 332 decreases and approaches the linear speed.

[0037] As can be seen from the above, the slip differential guide roller 332 assembly can be dynamically adjusted and controlled according to the change of linear speed, ensuring that the linear tension of the conveyed wire is close to zero. Multiple sets of slip differential guide roller 332 assemblies are arranged in a certain layout, such as multiple sets arranged laterally with symmetrical intervals between the upper and lower parts, to achieve a more stable linear speed change effect.

[0038] In summary, the variable speed follow-up wire winding and unwinding device provided in this application includes an unwinding roller 1, a tension detection roller unit 2, a tension adjusting roller unit 3, and a winding roller 4 unit. The wire on the unwinding roller 1 passes sequentially through the tension detection roller unit 2 and the tension adjusting roller unit 3 to the winding roller 4. The winding roller 4 is a powered roller with automatic winding and rotation capabilities; the unwinding roller 1 is a non-powered roller that rotates due to the pull of the wire. The tension of the transmitted wire can be controlled by adjusting the weight of the floating roller 22 in the tension detection roller unit 2. When the tension of the transmitted wire reaches its maximum value, the floating roller 22 rises to its upper limit position and triggers the upper travel limit switch to issue an excessive tension signal. When the conveyed wire suddenly breaks, the speed of the take-up roller 4 drops to zero, or the unwind roller is empty, the floating roller 22 sinks to its lower limit position and triggers the lower stroke limit switch to send a low tension signal. The tension regulating roller unit 3 can automatically control the wire tension between itself and the take-up roller 4 to be close to zero, ensuring that the wire is evenly and smoothly rewound onto the take-up roller 4. This device can realize the automatic take-up and unwinding function of the wire, and at the same time, it allows the speed of the take-up roller 4 to vary within a certain range during the take-up and unwinding process, realizing a variable speed follow-up effect. The whole device has a simple structure, low cost, and does not require a complex electrical control system to realize the automatic take-up and unwinding of wire, and has good feasibility, economy and reliability. It can be seen that the variable speed follow-up wire take-up and unwinding device provided in this application embodiment has the following beneficial effects:

[0039] First, the variable speed follow-up wire winding and unwinding device provided by the present invention eliminates the need for a device to detect the wire winding and unwinding speed and a precise wire tension detection device during automatic winding and unwinding, which greatly reduces hardware costs and control difficulty.

[0040] Secondly, the variable speed follow-up wire winding and unwinding device provided by the present invention solves the problem that it is difficult to control the synchronization of winding and unwinding speeds during the winding and unwinding process, and that the rotation speed of the winding roller is not variable.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A variable speed follower type wire winding and unwinding device, characterized in that, It includes an unwinding roll (1), a tension detection roll unit (2), a tension adjusting roll unit (3), and a take-up roll (4), wherein: The tension adjusting roller unit (3) includes a drive roller (31) and a differential guide roller assembly. Several differential guide roller assemblies are arranged alternately in the transverse direction, and the height difference between any differential guide roller assembly located at a high position and any differential guide roller assembly located at a low position is the same. The drive roller (31) is connected to the differential guide roller assembly. The unwinding roller (1) unwinds the wire sequentially through the tension detection unit and the differential guide roller assembly to the take-up roller (4). The differential guide roller assembly includes a spinning apron (331), a guide roller (332), and an isolation block. The isolation block is fixed, and the guide roller (332) is rotatably disposed on the front side of the isolation block. The spinning apron (331) is sleeved on the common envelope surface formed by the guide roller (332) and the isolation block. The bottom end of the guide roller (332) is flush with the bottom end of the isolation block, and the positive projection area of ​​the guide roller (332) on the isolation block is smaller than the area of ​​the projection surface. When the winding linear speed generated at the maximum diameter of the take-up roller (4) increases, the linear speed of the wire at the contact point with the wire in the tension regulating roller unit (3) tends to increase. At this time, the tension of the wire increases, which causes the positive pressure of the wire on the spinning apron (331) and the guide roller (332) to increase. This further increases the friction between the wire and the spinning apron (331) and the guide roller (332). At this time, the friction between the spinning apron (331) and the wire is a pair of interacting forces, which also increases. The increase in friction will drive the wire to accelerate forward until the linear speed of the wire at the contact point of the guide roller (332) approaches the linear speed.

2. The variable speed follower type wire winding and unwinding device according to claim 1, characterized in that, The spinning apron (331) rotates relative to the guide roller (332) and the isolation block.

3. The variable speed follower type wire winding and unwinding device according to claim 1, characterized in that, The inner diameter circumference of the spinning apron (331) is greater than the outer diameter circumference of the guide roller (332) and the outer diameter circumference of the isolation block.

4. The variable speed follower type wire winding and unwinding device according to claim 1, characterized in that, The guide roller (332) is mounted on a rotating shaft, and a transmission component is mounted on the rotating shaft. The drive roller (31) is connected to the transmission component via a transmission belt.

5. The variable speed follower type wire winding and unwinding device according to claim 1, characterized in that, The linear velocity of the drive roller (31) is greater than the linear velocity of the take-up roller (4).

6. The variable speed follower type wire winding and unwinding device according to claim 1, characterized in that, The tension detection roller unit (2) includes a directional guide roller (21) and a floating roller (22). One directional guide roller (21) is provided on each side of the floating roller (22), and the floating roller (22) floats up and down along the longitudinal direction.

7. The variable speed follower type wire winding and unwinding device according to claim 6, characterized in that, The floating roller (22) moves along the vertical line of the line connecting the two directional guide rollers (21).

8. The variable speed follower type wire winding and unwinding device according to claim 6, characterized in that, The highest floating point of the floating roller (22) does not exceed the horizontal plane where the directional guide roller (21) is located.

Images