Yarn rack tension control mechanism of carbon fiber spreading and warping machine

Abstract

This utility model discloses a yarn frame tension control mechanism for a carbon fiber spreading and warping machine, including a yarn frame and several yarn bobbins, as well as a yarn bobbin support frame, a support frame mounting base, a magnetic powder brake, and a rotating shaft. One end of the rotating shaft passes through the rotor of the magnetic powder brake and is interference-fitted to the rotor or connected via a keyway key block structure. The front cylinder of the support frame is fitted onto the other end of the rotating shaft, and the yarn bobbins are mounted on the front cylinder of the support frame. The rear cylinder of the mounting base is fitted onto the shaft body and fixedly connected to the shaft body by a first set screw. The rear cylinder of the support frame is inserted into the inner hole of the front cylinder of the mounting base, and the two are fixedly connected by a second set screw. A guide roller is provided at the unwinding point of the carbon fiber yarn on each yarn bobbin, and a pressure sensor is installed at one or both ends of the guide roller. This utility model allows each yarn bobbin to be controlled individually, enabling adjustment of the carbon fiber yarn tension at the unwinding point of each yarn bobbin, ensuring that the carbon fiber yarn tension at the unwinding point of each yarn bobbin meets the process requirements.

Description

Technical Field

[0001] This utility model relates to a carbon fiber spreading and warping machine, and more particularly to a yarn frame tension control mechanism for a carbon fiber spreading and warping machine, belonging to the field of textile equipment technology. Background Technology

[0002] When the carbon fiber spreading and warping machine is working, the carbon fiber yarn is passively unwinding from the yarn bobbin mounted on the yarn frame. It then passes through the tension spring of the tension bar, the guide tube, and the yarn separating reed before entering the vibrating device and heating device area. After being vibrated at high frequency by the vibrating device and heated by the heating device, the yarn spreads into the pulling device and is finally wound onto the coil by the winding device.

[0003] The existing yarn frame structure of carbon fiber spreading and warping machines has the following drawbacks in actual use: After the strip-shaped carbon fiber yarn bundles are formed into bobbins and then unwound, they often become bent, not straight, and have inconsistent widths, resulting in different tensions of the carbon fiber yarn at each bobbin unwinding point. Furthermore, since the tension spring of the tension bar only provides a certain tension and cannot adjust the tension of the carbon fiber yarn, the tension of the carbon fiber yarn at each bobbin unwinding point cannot meet the process requirements. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a yarn frame tension control mechanism for a carbon fiber spreading and warping machine that can adjust the tension of carbon fiber yarn at each unwinding point of the yarn bobbin, ensure that the tension of carbon fiber yarn at each unwinding point of the yarn bobbin meets the process requirements, and has a simple structure and is easy to install.

[0005] To solve the above-mentioned technical problems, this utility model adopts a yarn frame tension control mechanism for a carbon fiber spreading and warping machine, including a yarn frame and several yarn bobbins mounted on the yarn frame. Each yarn bobbin is wound with carbon fiber yarn. It also includes a yarn bobbin support frame, a support frame mounting base, a magnetic powder brake, and a horizontally arranged rotating shaft. The magnetic powder brake is fixedly mounted on the yarn frame. One end of the rotating shaft passes through the rotor of the magnetic powder brake and is interference-fitted with the rotor or connected via a keyway and key block structure. The yarn bobbin support frame consists of a small-diameter front cylinder and a large-diameter rear cylinder. The front cylinder is fitted onto the other end of the rotating shaft. The yarn bobbin is mounted on the front cylinder. The support frame mounting base consists of a small... The device consists of a rear cylinder for the diameter section of the mounting base and a front cylinder for the large diameter section of the mounting base. The rear cylinder is fitted onto the rotating shaft between the magnetic powder brake and the yarn bobbin support frame. The rear cylinder is fixedly connected to the rotating shaft via a first set screw. The outer circle of the rear cylinder of the support frame is adapted to the inner hole of the front cylinder of the mounting base. The rear cylinder of the support frame is inserted into the inner hole of the front cylinder of the mounting base, and the two are fixedly connected via a second set screw. A guide roller is provided at the unwinding point of the carbon fiber yarn on each yarn bobbin. The guide roller is arranged along the width of the carbon fiber yarn. A pressure sensor for measuring the tension of the carbon fiber yarn passing through the guide roller is installed at one or both ends of the guide roller. The magnetic powder brake, the pressure sensor, and the central processing unit of the warping machine are connected.

[0006] In a preferred embodiment of this utility model, a position sensor for measuring the diameter of the carbon fiber yarn wound on the yarn bobbin is installed above or below each yarn bobbin, and the position sensor is connected to the central processing unit of the warping machine.

[0007] In a preferred embodiment of this utility model, the two ends of the guide roller are rotatably connected to a bearing seat, the bearing seat is fixedly connected to the top plate of the pressure sensor, and the bottom plate of the pressure sensor is fixedly connected to the frame of the warping machine.

[0008] In a preferred embodiment of this utility model, the central processing unit of the warping machine includes an industrial control computer, a programmable logic controller (PLC), or a distributed control system (DCS).

[0009] By adopting the above structure, this utility model has the following beneficial effects:

[0010] This invention features a yarn bobbin support frame, a support frame mounting base, a magnetic powder brake, and a rotating shaft mounted on a yarn frame. One end of the rotating shaft is inserted into the rotor of the magnetic powder brake. The front cylinder of the support frame is fitted onto the other end of the rotating shaft. The yarn bobbin is mounted on the front cylinder of the support frame. The rear cylinder of the mounting base is fitted onto the rotating shaft between the magnetic powder brake and the yarn bobbin support frame. The rear cylinder of the mounting base is fixedly connected to the rotating shaft via a first set screw. The rear cylinder of the support frame is inserted into the inner hole of the front cylinder of the mounting base, and the two are fixedly connected via a second set screw. A guide roller is provided at the unwinding point of the carbon fiber yarn on each yarn bobbin. A pressure sensor is installed at one or both ends of the guide roller. The magnetic powder brake, the pressure sensor, and the central processing unit of the warping machine are connected. During operation, the carbon fiber yarns on the yarn bobbins mounted on the yarn frame are unwound from their respective bobbins and pass through the guide rollers corresponding to their respective unwinding points. Pressure sensors at the ends of each guide roller detect the tension value of the carbon fiber yarn as it passes through the guide roller in real time and transmit these values ​​to the central processing unit (CPU). The CPU calculates the difference between each tension value and the specified tension value, and adjusts the rotational speed of the yarn bobbin corresponding to each guide roller by controlling the braking torque of the magnetic powder brake, until the tension value of the carbon fiber yarn at each unwinding point equals or falls within the specified tension value range. This invention, through the above-described individual adjustment of the carbon fiber yarn tension at each unwinding point of the yarn bobbin, ensures that the tension of the carbon fiber yarn at each unwinding point meets the specified process requirements.

[0011] This invention involves installing a position sensor above or below each yarn bobbin, which is connected to the central processing unit (CPU) of the warping machine. The position sensor detects the diameter of the carbon fiber yarn wound on each bobbin in real time and transmits this value to the CPU. Based on a table showing the relationship between the carbon fiber yarn diameter and tension or historical values, the CPU fine-tunes the rotational speed of each guide roller to ensure that the tension of the carbon fiber yarn at the unwinding point of each bobbin meets the specified process requirements.

[0012] When the machine stops, this invention can increase the output torque of the magnetic powder brake corresponding to each yarn bobbin, thereby reliably stopping the yarn output of each yarn bobbin.

[0013] Each yarn bobbin in this invention can be individually controlled, ensuring that the tension of the carbon fiber yarn at the unwinding point of each bobbin meets the process requirements. It also features fast response, no noise, simple structure, low manufacturing cost, and convenient installation. Attached Figure Description

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0015] Figure 1This is a schematic diagram of the tension control mechanism of the yarn frame of the carbon fiber spreading and warping machine of this utility model.

[0016] Figure 2 This is a schematic diagram of one structure of the yarn bobbin support frame in this utility model.

[0017] Figure 3 This is a front perspective three-dimensional schematic diagram of the support frame mounting base in this utility model.

[0018] Figure 4 This is a rear perspective three-dimensional schematic diagram of the support frame mounting base in this utility model.

[0019] Figure 5 This is a schematic diagram of an installation structure for the guide roller and pressure sensor in this utility model.

[0020] Figure 6 This is a schematic diagram of a brake mounting base in this utility model. Detailed Implementation

[0021] See Figures 1 to 6The diagram illustrates a yarn tension control mechanism for a carbon fiber spreading and warping machine. It includes a yarn frame 1 and several yarn bobbins 2 mounted on the yarn frame 1. The number of yarn bobbins 2 is typically dozens or hundreds; only one is shown in the diagram, the others are not. Each yarn bobbin 2 is wound with carbon fiber yarn 3. The mechanism also includes a yarn bobbin support frame 4, a support frame mounting base 5, a magnetic powder brake 6, and a horizontally arranged rotating shaft 7. The magnetic powder brake 6 is fixedly mounted on the yarn frame 1, preferably via an annular brake mounting base 15. The shaft 7 is bolted to the yarn frame 1. One end 7-1 of the shaft 7 is inserted into the rotor 6-1 of the magnetic powder brake 6 and is either interference-fitted with the rotor 6-1 or connected via a keyway block structure. The yarn bobbin support frame 4 consists of a small-diameter front cylinder 4-1 and a large-diameter rear cylinder 4-2. The front cylinder 4-1 is fitted onto the other end 7-2 of the shaft 7. The yarn bobbin 2 is mounted on the front cylinder 4-1, preferably with a tight fit. The support frame is mounted on the front cylinder 4-1, allowing both to rotate or stop together. The support frame mounting base 5 consists of a small-diameter rear cylinder 5-1 and a large-diameter front cylinder 5-2. The rear cylinder 5-1 is fitted onto the shaft 7 between the magnetic powder brake 6 and the yarn bobbin support frame 4, and is fixedly connected to the shaft 7 via a first set screw 8. The outer diameter of the rear cylinder 4-2 matches the inner diameter of the front cylinder 5-2. The rear cylinder 4-2 of the support is inserted into the inner hole of the front cylinder 5-2 of the mounting base and the two are fixedly connected by the second set screw 9. A guide roller 10 is provided at the unwinding point of the carbon fiber yarn 3 of each yarn bobbin 2. The guide roller 10 is arranged along the longitudinal direction of the carbon fiber yarn 3. A pressure sensor 11 for measuring the tension of the carbon fiber yarn passing through the guide roller 10 is installed at one or both ends of the guide roller 10. The magnetic powder brake 6 and the pressure sensor 11 are connected to the central processing unit of the warping machine through a wired cable or wireless signal.

[0022] As a preferred embodiment of this utility model, such as Figure 1 As shown, a position sensor 12 for measuring the diameter of the carbon fiber yarn wound on the yarn bobbin 2 is installed above or below each yarn bobbin 2. The position sensor 12 is connected to the central processing unit of the warping machine via a wired cable or wireless signal.

[0023] As a preferred embodiment of this utility model, such as Figure 5 As shown, the two ends of the guide roller 10 are rotatably connected to a bearing seat 13, the bearing seat 13 is fixedly connected to the top plate 11-1 of the pressure sensor 11 by bolts, and the bottom plate 11-2 of the pressure sensor 11 is fixedly connected to the frame 14 of the warping machine by bolts.

[0024] In this utility model, the yarn bobbin support frame 4 and the support frame mounting base 5 may not be independent parts, but may be made into an integral part. In this way, there is no need for the second set screw 9 to fix the two together. That is to say, the connection structure of the yarn bobbin support frame 4, the support frame mounting base 5 and the second set screw 9 is equivalent to the yarn bobbin support frame 4 and the support frame mounting base 5 being made into an integral part.

[0025] In a preferred embodiment of this utility model, the central processing unit of the warping machine includes an industrial control computer, a programmable logic controller (PLC), or a distributed control system (DCS), etc., but the central processing unit is not shown in the figure.

[0026] As a preferred mode of operation of this utility model, see [link to relevant documentation]. Figure 1 The carbon fiber yarns 3 of the yarn bobbins 2 mounted on the yarn frame 1 are unwound from their respective bobbins 2 and pass through the guide rollers 10 corresponding to their unwinding points. The pressure sensors 11 at the ends of each guide roller 10 detect the tension value of the carbon fiber yarn 3 as it passes through each guide roller 10 in real time and transmit the tension value to the central processing unit. The central processing unit calculates the difference between each tension value and the tension value specified in the process. By controlling the braking torque of the magnetic powder brake 6 corresponding to each guide roller 10, the rotation speed of the yarn bobbin 2 corresponding to each guide roller 10 is adjusted. Preferably, at the same time, the position sensors 12 of each yarn bobbin 2 detect the diameter value of the carbon fiber yarn wound on each yarn bobbin 2 in real time and transmit the diameter value of each carbon fiber yarn to the central processing unit. The central processing unit fine-tunes the rotation speed of the yarn bobbin 2 corresponding to each guide roller 10 more precisely until the tension value of the carbon fiber yarn at the unwinding point of each yarn bobbin 2 is equal to or within the range of the tension value specified in the process.

[0027] After trial use, it was found that each yarn bobbin of this invention can be controlled individually, and the tension of the carbon fiber yarn at the unwinding point of each yarn bobbin can be adjusted to ensure that the tension of the carbon fiber yarn at the unwinding point of each yarn bobbin meets the process requirements, thus achieving good practical results.

Claims

1. A yarn tension control mechanism for a carbon fiber spreading and warping machine, comprising a yarn frame (1) and a plurality of yarn bobbins (2) mounted on the yarn frame (1), each yarn bobbin (2) having carbon fiber yarn (3) wound on it, characterized in that: It also includes a yarn bobbin support frame (4), a support frame mounting base (5), a magnetic powder brake (6), and a horizontally arranged rotating shaft (7). The magnetic powder brake (6) is fixedly installed on the yarn frame (1). One end (7-1) of the rotating shaft (7) passes through the rotor (6-1) of the magnetic powder brake (6) and is interference-fitted with the rotor (6-1) or connected through a keyway key block structure. The yarn bobbin support frame (4) is composed of a small-diameter front cylinder (4-1) and a large-diameter rear cylinder (4-2). The front cylinder (4-1) is fitted onto the other end (7-2) of the rotating shaft (7). The yarn bobbin (2) is installed on the front cylinder (4-1). The support frame mounting base (5) is composed of a small-diameter rear cylinder (5-1) and a large-diameter front cylinder (5-2). The rear cylinder (5-1) is mounted on the yarn bobbin (7). -1) The shaft (7) is mounted between the magnetic powder brake (6) and the yarn bobbin support frame (4), and the rear cylinder (5-1) of the mounting base is fixedly connected to the shaft (7) by the first set screw (8). The outer circle of the rear cylinder (4-2) of the support frame is adapted to the inner hole of the front cylinder (5-2) of the mounting base. The rear cylinder (4-2) of the support frame is inserted into the inner hole of the front cylinder (5-2) of the mounting base and the two are fixedly connected by the second set screw (9). A guide roller (10) is set at the unwinding point of the carbon fiber yarn (3) of each yarn bobbin (2). The guide roller (10) is arranged along the longitudinal direction of the carbon fiber yarn (3). A pressure sensor (11) for measuring the tension of the carbon fiber yarn passing through the guide roller (10) is installed at one or both ends of the guide roller (10). The magnetic powder brake (6) and the pressure sensor (11) are connected to the central processing unit of the warping machine.

2. The yarn frame tension control mechanism of the carbon fiber spreading and warping machine according to claim 1, characterized in that: A position sensor (12) for measuring the diameter of the carbon fiber yarn wound on the yarn bobbin (2) is installed above or below each yarn bobbin (2), and the position sensor (12) is connected to the central processing unit of the warping machine.

3. The yarn frame tension control mechanism of the carbon fiber spreading and warping machine according to claim 1, characterized in that: The two ends of the guide roller (10) are rotatably connected to a bearing seat (13), the bearing seat (13) is fixedly connected to the top plate (11-1) of the pressure sensor (11), and the bottom plate (11-2) of the pressure sensor (11) is fixedly connected to the frame (14) of the warping machine.

4. The yarn frame tension control mechanism of the carbon fiber spreading and warping machine according to claim 1, 2, or 3, characterized in that: The central processing unit of the warping machine includes an industrial control computer, a programmable logic controller (PLC), or a distributed control system (DCS).

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