Fixed-length shearing device and method

Abstract

The invention discloses a fixed-length shearing device and method.The fixed-length shearing device comprises a winding assembly, a cutting assembly, a length detection assembly and a control part, and the length detection assembly comprises a speed sensor used for detecting the winding speed and a pressure sensor used for detecting the tension of a fiber bundle and generating a pressure signal; and the control part can calculate the winding length according to the winding speed and the duration of generating the pressure signal. According to the device, the speed sensor can detect the traction moving speed of the fiber bundle in real time, the pressure sensor can detect the tension generated when the fiber bundle is dragged and generate the preset pressure signal, and when the fiber bundle slips relative to the winding assembly, the reading of the pressure sensor can be changed; the actual winding length is calculated based on the winding speed and the time of the preset pressure signal, the situation that length detection is inaccurate due to fiber slipping can be avoided, fiber material shafts with the actual length consistent with the expected length can be manufactured, and the quality of final products is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of fiber bundle preparation, and particularly to a fixed-length shearing device and method. Background Art

[0002] Since fibers (such as carbon fibers, glass fibers, etc.) have characteristics such as light weight, high strength, high modulus, corrosion resistance, and high temperature resistance, they are widely used in fields such as aerospace, rail transit, and new energy. Before the fibers are made into final products, they usually need to be cut into a certain length first. The length of the fibers determines the application fields, processing methods, and performance of the final products.

[0003] In related technologies, it is impossible to ensure the length of the fibers after shearing during fixed-length shearing of fibers, which seriously affects the application in fields with high requirements for material uniformity and consistency. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this application provides a fixed-length shearing device and method.

[0005] According to the first aspect of the embodiments of this application, a fixed-length shearing device is provided for performing fixed-length shearing on a fiber bundle. The fixed-length shearing device includes:

[0006] A winding assembly for uniformly winding the fiber bundle;

[0007] A cutting assembly for shearing and dividing the wound part and the unwound part when the winding length of the fiber bundle reaches the target length;

[0008] A length detection assembly including a speed sensor and a pressure sensor. The speed sensor is used to detect the winding speed of the winding assembly, and the pressure sensor is used to detect the tension generated when the fiber bundle is pulled by the winding assembly and generate a pressure signal;

[0009] A control unit is electrically connected to the winding assembly, the cutting assembly, and the length detection assembly. The control unit is used to determine the actual winding length according to the winding speed and the duration of the pressure signal, and control the cutting assembly to perform fixed-length shearing when the actual winding length is equal to the target winding length.

[0010] In some embodiments, the length detection assembly further includes a first support member, and the pressure sensor includes a first pressure sensor, and the first pressure sensor is disposed on the first support member;

[0011] During the operation state, the fiber bundle includes a connected first extension section and a second extension section, and the connection position of the first extension section and the second extension section contacts the first support member or the first pressure sensor;

[0012] Wherein, the first extension section and the second extension section have a preset included angle, and the opening of the preset included angle formed by the first extension section and the second extension section faces the first support member and the first pressure sensor.

[0013] In some embodiments, the support structure further includes a second support member, and the pressure sensor further includes a second pressure sensor, and the second pressure sensor is disposed on the second support member;

[0014] The first support member and the second support member are of a split structure, and the first support member and the second support member enclose a wire passing channel.

[0015] In some embodiments, the length detection assembly further includes a distance adjustment mechanism, the distance adjustment mechanism is connected to the second support member, and the adjustment mechanism is configured to adjust the distance between the first support member and the second support member to adjust the aperture of the wire passing channel.

[0016] In some embodiments, along the arrangement direction of the first support member and the second support member, the first pressure sensor is disposed on a side of the first support member facing away from the second support member, and / or, the second pressure sensor is disposed on a side of the second support member facing away from the first support member;

[0017] Detachable flannelette is provided on opposite surfaces of the first support member and the second support member.

[0018] In some embodiments, the winding assembly includes:

[0019] A winding bracket configured to be rotatable about a preset rotating shaft;

[0020] At least two winding rollers disposed on the winding bracket and evenly distributed along the circumferential direction of the preset rotating shaft;

[0021] At least two winding cylinders detachably sleeved on the at least two winding rollers;

[0022] A tension sensor is disposed on the outer peripheral surface of the winding roller, and the tension sensor is electrically connected to the control unit.

[0023] According to a second aspect of the present disclosure, a fixed-length shearing method is provided, which is applied to the fixed-length shearing device as described in the first aspect, and the fixed-length shearing method includes:

[0024] Pass a fiber bundle through the length detection assembly of the fixed-length shearing device and wind it around the winding assembly;

[0025] Control the winding assembly to wind the fiber bundle at a constant speed, control the length detection assembly to detect the winding speed and the tension of the fiber bundle and generate a pressure signal based on the tension;

[0026] Determine the current winding length of the fiber bundle according to the winding speed and the duration of generating a preset pressure signal, wherein when the length detection component generates the preset pressure signal, it indicates that the fiber bundle does not slip relative to the winding component;

[0027] Control the start and stop of the winding component and the cutting component according to the current winding length and the target winding length; wherein, when the current winding length is equal to the target winding length, control the winding component to stop and control the cutting component to start to cut off the fiber bundle to complete fixed-length shearing.

[0028] In some embodiments, the pressure sensor of the length detection component includes a first pressure sensor, and the first pressure sensor is arranged on a first support member of the support structure of the length detection component;

[0029] The determining the current winding length of the fiber bundle according to the winding speed detected by the speed sensor in the length detection component and the duration of the pressure sensor generating the pressure signal includes:

[0030] Determine the current winding length of the fiber bundle according to the product of the winding speed and the duration of the first pressure sensor generating a first preset pressure signal.

[0031] In some embodiments, the pressure sensor of the length detection component further includes a second pressure sensor, and the second pressure sensor is arranged on a second support member of the support structure of the length detection component;

[0032] After passing the fiber bundle through the length detection component of the fixed-length shearing device, it further includes:

[0033] Adjust the distance between the first support member and the second support member of the support structure of the length detection component to make the second pressure sensor generate a second preset pressure signal.

[0034] In some embodiments, when the current winding length is equal to the target winding length, after controlling the cutting component to cut off the fiber bundle to complete fixed-length shearing, it further includes:

[0035] Control the winding bracket of the winding component to rotate around a preset rotating shaft, so that the bobbin winding the fiber bundle rotates to the unloading position and the bobbin not winding the fiber bundle rotates to the winding position.

[0036] The technical solutions provided by the embodiments of the present application may include the following beneficial effects: The speed sensor can detect the speed at which the fiber bundle is being pulled and moved in real time. The pressure sensor can detect the tension generated when the fiber bundle is being pulled and generate a preset pressure signal. When the fiber bundle slips relative to the winding assembly, the reading of the pressure sensor will change. Calculating the actual winding length based on the winding speed and the time of the preset pressure signal can avoid the situation where the length detection is inaccurate due to fiber slippage, which is beneficial for making a fiber bobbin with an actual length consistent with the expected length to ensure the quality of the final product.

[0037] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0039] Figure 1 The schematic diagram of the fixed-length shearing device provided by an embodiment of the present application is shown;

[0040] Figure 2 The schematic diagram of the length detection assembly provided by an embodiment of the present application is shown;

[0041] Figure 3 is Figure 2 The cross-sectional view in the A-A direction in;

[0042] Figure 4 The flowchart of the fixed-length shearing method provided by an embodiment of the present application is shown.

[0043] In the figure:

[0044] 10. Winding assembly; 11. Clamping roller; 12. Winding roller; 13. Winding bracket; 14. Preset rotating shaft; 15. Winding cylinder; 16. Tensioning roller;

[0045] 20. Length detection assembly; 20a. Wire passing channel; 21. First support; 22. First pressure sensor; 23. Second support; 24. Second pressure sensor; 25. Flannel; 26. Guide roller;

[0046] 30. Yarn guiding hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0048] In the related art, when performing fixed-length shearing of fibers, a certain winding speed is usually set for the production line, and the winding duration is determined according to the ratio of the expected winding length to the winding speed. When the actual operation duration is equal to the calculated required duration, operations such as shearing and shaft cutting are performed to achieve fixed-length shearing. However, when abnormal working conditions occur (such as a sudden change in the winding speed caused by an abnormal winding motor or slipping of the fiber bundle relative to the traction roller), if shaft cutting and shearing are performed according to the calculated required time, there will be a difference between the wound material shaft and the expected material shaft, affecting the quality and performance of the final product.

[0049] To solve the problems existing in the related art, the present application provides a fixed-length shearing device and method. The fixed-length shearing device includes a winding assembly, a cutting assembly, a length detection assembly, and a control unit electrically connected to the winding assembly, the cutting assembly, and the length detection assembly. The length detection assembly includes a speed sensor for detecting the winding speed of the winding assembly and a pressure sensor for detecting the pressure between the fiber bundle and generating a pressure signal. The control unit can calculate the winding length based on the winding speed and the duration of generating the pressure signal, and control the cutting assembly to perform cutting when the winding length reaches a certain length. In the present application, the speed sensor can detect the speed at which the fiber bundle is being tractionally moved in real time, and the pressure sensor can detect the tension generated when the fiber bundle is being tractionally moved and generate a preset pressure signal. When the fiber bundle slips relative to the winding assembly, the reading of the pressure sensor will change. Calculating the actual winding length based on the winding speed and the time of the preset pressure signal can avoid inaccurate length detection caused by fiber slipping, which is beneficial for making a fiber material shaft with an actual length consistent with the expected length to ensure the quality of the final product.

[0050] According to an exemplary embodiment of the present application, this embodiment provides a fixed-length shearing device. The fixed-length shearing device is used for performing fixed-length shearing on the fiber bundle 100. The fixed-length shearing device can wind and wind the longer fiber bundle 100 to a certain length and then shear it, which is beneficial for storing the fiber bundle 100 and facilitating the production of various different final products.

[0051] As Figure 1As shown, the fixed-length shearing device includes a winding assembly 10 and a cutting assembly. The winding device is used to provide a traction force to the fiber bundle 100 and wind the fiber bundle 100. The winding device includes a first servo motor and a clamping roller 11 arranged on the output shaft of the first servo motor. The first servo motor outputs torque to drive the clamping roller 11 to rotate to drive the fiber bundle 100 to move at a constant speed. The winding device further includes a second servo motor and a winding roller 12 arranged on the second servo motor. The winding roller 12 is sleeved with a detachable winding cylinder 15. The second servo motor outputs torque to drive the winding roller 12 and the winding cylinder 15 to rotate, so as to wind the fiber bundle 100 onto the winding cylinder 15. It can be understood that as the fiber bundle 100 wound on the winding cylinder 15 gradually increases, the diameter of the material shaft (i.e., the total name of the winding cylinder 15 and the fiber bundle 100) gradually increases, which is not conducive to driving the fiber bundle 100 in motion. Therefore, in this embodiment, the first servo motor and the clamping roller 11 are provided to drive the fiber bundle 100 to move at a constant speed.

[0052] As Figure 1 shown, the fixed-length shearing device further includes a length detection assembly 20. The length detection assembly 20 is used to detect the winding length of the fiber bundle 100. Refer to Figure 1 , the length detection assembly 20 includes a speed sensor and a pressure sensor.

[0053] Among them, refer to Figure 1 , the speed sensor can detect the winding speed of the winding assembly 10. In one example, the speed sensor can be an encoder. The encoder can detect the rotational angular velocity of the first servo motor in the winding assembly 10. The winding speed of the winding assembly 10 can be determined by the rotational angular velocity and the diameter of the clamping roller 11 in the winding assembly 10.

[0054] Among them, refer to Figure 1 , the pressure sensor can detect the magnitude of the tension generated when the fiber bundle 100 is under traction and generate a pressure signal. In this embodiment, the extension directions of the fiber bundle 100 before and after passing through the pressure sensor are different. It can be understood that when the winding assembly 10 provides a traction force to the fiber bundle 100, it will cause the fiber bundle 100 to generate tension and squeeze the pressure sensor, causing the pressure sensor to generate a large reading. When the fiber bundle 100 slips relative to the winding assembly 10, the tension of the fiber bundle 100 disappears and the pressure detected by the pressure sensor drops suddenly. In this embodiment, by adaptively setting the pressure sensor, the fiber bundle 100 can apply different magnitudes of extrusion forces to the pressure sensor in the stationary state and the moving state, so as to determine whether the fiber bundle 100 slips according to the different pressure signals generated by the pressure sensor.

[0055] In one example, refer to Figure 1, in the traction direction of the fiber bundle 100, a guiding roller 26 is provided at each of the front end and the rear end of the length detection assembly 20. The wire passing channel 20a of the support structure is not collinear with the two guiding rollers 26, and the first support member 21 of the length detection assembly (detailed introduction later) is set to be closer to the connection line of the two guiding rollers 26 than the second support member 23 (detailed introduction later), that is, the first support member 21 is arranged between the connection line of the two guiding rollers 26 and the second support member 23. The pressure sensor causes the fiber bundle 100 to form a preset angle a before and after passing through the pressure sensor, and the preset angle can be 90° to 165°.

[0056] The fixed-length shearing device provided in this embodiment further includes a control unit, which is electrically connected to the winding assembly 10, the cutting assembly, and the length detection assembly 20. The control unit can obtain the winding speed detected by the speed sensor in the length detection assembly 20, and obtain the duration of the pressure signal generated by the pressure sensor. The control unit can calculate and determine the winding length according to the winding speed and the duration of the pressure signal, so as to control the cutting device to perform fixed-length shearing when the winding length reaches the target length. Among them, when the control unit does not receive the detection signal of the pressure sensor, it can be determined that there is slippage between the first servo motor and the clamping roller 11 and the fiber bundle 100. Therefore, the control unit can calculate the winding length according to the duration of the pressure signal generated by the pressure sensor, rather than the actual operation duration, so as to ensure the accuracy of length calculation in the case of abnormal working conditions.

[0057] In the embodiment of the present application, the speed sensor can detect the speed of the fiber bundle being tractionally moved in real time, and the pressure sensor can detect the tension generated when the fiber bundle is tractionally moved and generate a preset pressure signal. When the fiber bundle slips relative to the winding assembly, it will cause a change in the reading of the pressure sensor. Calculating the actual winding length based on the winding speed and the time of the preset pressure signal can avoid the situation that the length detection is inaccurate due to fiber slippage, which is beneficial to making a fiber spool with an actual length consistent with the expected length to ensure the quality of the final product.

[0058] In an exemplary embodiment, as Figure 1 shown, this embodiment provides a fixed-length shearing device, which includes a winding assembly 10, a cutting assembly, a length detection assembly 20, and a control unit. The winding assembly 10 is used to wind the fiber bundle 100 at a constant speed, the cutting assembly is used to shear and separate the wound part and the unwound part, the length detection assembly 20 includes a speed sensor and a pressure sensor, the speed sensor is used to detect the winding speed of the winding assembly 10, and the pressure sensor is used to detect the pressure between the fiber bundle 100 and the pressure sensor and generate a pressure signal.

[0059] Among them, as Figure 2 and Figure 3As shown, the length detection component 20 includes a support structure. The support structure has a wire passing channel 20a that penetrates along the length direction of the fiber bundle 100. The pressure sensor is arranged on the support structure. When the fiber bundle 100 passes through the support structure, the support structure can extrude the fiber bundle 100 so that the pressure sensor generates a pressure signal.

[0060] Among them, as Figure 2 and Figure 3 shown, the support structure includes a separate first support member 21 and a second support member 23. Pressure sensors are arranged on both the first support member 21 and the second support member 23. For example, a first pressure sensor 22 is arranged on the first support member 21, and a second pressure sensor 24 is arranged on the second support member 23. The first pressure sensor 22 and the second pressure sensor 24 are used to detect different parameters during the winding operation.

[0061] Referring to Figure 1 and Figure 2 , in the operating state, the extension directions of the fiber bundle 100 before and after passing through the support structure are different and form a preset angle a of 0° to 180°. The first support member 21 and the first pressure sensor 22 are arranged on the opening side of the preset angle of the fiber bundle 100, and the second support member 23 and the second pressure sensor 24 are arranged on the side of the fiber bundle 100 opposite to the opening of the preset angle.

[0062] In some embodiments, when the winding component 10 drives the fiber bundle 100 to move, the tension generated by the fiber bundle 100 acts on the first support member 21 and the first pressure sensor 22 arranged on the first support member 21. When the fiber bundle 100 slips relative to the winding component 10, there is no tension in the fiber bundle 100, causing the reading of the first pressure sensor 22 to change (decrease). Exemplarily, when the fiber bundle 100 slips relative to the winding component 10, the reading of the first pressure sensor 22 is F1, and when the fiber bundle 100 does not slip relative to the winding component 10, the reading of the first pressure sensor 22 is F2, and F1 is greater than F2. That is, the control unit can determine whether the fiber bundle 100 slips according to the reading of the first sensor.

[0063] In some other embodiments, there are some fiber filaments with shorter lengths in the fiber bundle 100 composed of multiple fiber filaments. After the fiber bundle 100 is wound to a certain length, the number of fiber filaments in the fiber bundle 100 will decrease, which may affect the quality of the final product. Therefore, in this embodiment, the first support member 21 and the second support member 23 are provided to generate a squeezing pressure on the fiber bundle 100 in the wire passing channel 20a, and the control unit determines whether the number of fiber filaments meets the standard according to the reading of the second pressure sensor 24. Exemplarily, when the number of fiber filaments in the fiber bundle 100 meets the standard, the reading of the second pressure sensor 24 is F3, and when the number of fiber filaments decreases, the reading of the second pressure sensor 24 is F4, and F3 is greater than F4. That is, the control unit can determine whether the fiber filaments in the fiber bundle 100 meet the standard according to the reading of the second pressure sensor 24, and the control unit can control the winding device to stop winding when the number of fiber filaments does not meet the preset standard. Here, it should be noted that there will inevitably be shorter fiber filaments in the fiber bundle 100. Therefore, in this embodiment, the control unit can control the winding assembly 10 to stop winding after the difference or ratio between F3 and F4 reaches a certain threshold.

[0064] Among them, as Figure 1 shown, the length detection assembly 20 further includes a distance adjustment mechanism. The distance adjustment mechanism is connected to the second support member 23, and the adjustment mechanism can adjust the distance between the first support member 21 and the second support member 23 to adjust the aperture of the wire passing channel 20a of the support structure, and further adjust the squeezing pressure of the first support member 21 and the second support member 23 on the fiber bundle 100. In one example, the distance adjustment mechanism can be an adjustment screw, and the adjustment screw extends along the arrangement direction of the first support member 21 and the second support member 23.

[0065] Among them, as Figure 1 and Figure 3 shown, along the arrangement direction of the first support member 21 and the second support member 23, the first pressure sensor 22 is arranged on the side of the first support member 21 facing away from the second support member 23, and a detachable flannelette 25 is arranged on the side of the first support member 21 facing the second support member 23. The detachable flannelette 25 can remove the floating hairs on the surface of the fiber filaments and improve the appearance cleanliness and tactile fineness of the final product made of the fiber bundle 100. Similarly, the second pressure sensor 24 is arranged on the side of the second support member 23 facing away from the first support member 21, and a detachable flannelette 25 is arranged on the side of the second support member 23 facing the first support member 21.

[0066] Among them, as Figure 1As shown, the winding assembly 10 includes a winding bracket 13, at least two winding rollers 12 and at least two winding cylinders 15. The multiple winding cylinders 15 are separately arranged on the multiple winding rollers 12, and at least two winding rollers 12 are arranged on the winding bracket 13. The winding bracket 13 can rotate around a preset rotating shaft 14 to drive the winding rollers 12 to move along the circumferential direction of the preset rotating shaft 14, so as to realize the switching of the winding rollers 12. Switching the winding rollers 12, for example, makes the wound winding shaft and winding cylinder 15 move to the unloading position, and makes the unwound winding rollers 12 and winding cylinders 15 move to the loading and winding position.

[0067] In some embodiments, as Figure 1 shown, a tension sensor is arranged on the outer peripheral surface of the winding roller 12, and the tension sensor is electrically connected to the control unit. The tension sensor can detect the interaction force between the outer peripheral surface of the winding roller 12 and the inner wall surface of the winding cylinder 15, and the control unit can adjust the winding speed of the winding roller 12 according to the value of the tension sensor to avoid the rotational linear speed of the winding roller 12 being greater than the rotational linear speed of the clamping roller 11. In addition, the control unit can also judge whether the winding roller 12 is in the loading and winding position or the unloading position according to the reading of the tension sensor.

[0068] In some embodiments, referring to Figure 1 , the winding assembly 10 further includes a tensioning roller 16. The tensioning roller 16 is arranged between the clamping roller 11 and the winding roller 12. The tensioning roller 16 makes the part of the fiber bundle 100 between the clamping roller 11 and the winding roller 12 in a bent shape. When the traction speed of the winding roller 12 is greater than the traction speed of the clamping roller 11, the tensioning roller 16 can displace to make the two bent parts of the fiber bundle 100 in a straight shape, so as to avoid the fiber bundle 100 being broken. And, the tensioning roller 16 can also make the two bent parts of the fiber bundle 100 more bent when the traction speed of the clamping roller 11 is greater than the traction speed of the winding roller 12, so as to avoid the loosening of the fiber bundle 100 wound on the winding roller 12 affecting the winding effect.

[0069] According to an exemplary embodiment of the present application, this embodiment provides a fixed-length shearing method. The fixed-length shearing method can be executed by using the fixed-length shearing device provided in any of the foregoing embodiments of the present application, as Figure 4 shown, the fixed-length shearing method includes the following steps:

[0070] Step S110: Pass the fiber bundle through the length detection assembly of the fixed-length shearing device and wind it onto the winding assembly.

[0071] In this step, referring to Figure 1 , after the fiber bundle 100 is led out from a wire unwinding frame (not shown in the drawings), the free end of the fiber bundle 100 is successively passed through the yarn guiding holes 30 (refer to Figure 1) The length detection component 20, the clamping roller 11 of the winding component 10, and a cutting component (not shown in the drawings), and is wound around the winding drum 15 of the winding roller 12 of the winding component 10.

[0072] The clamping roller can provide a stable traction force for the fiber bundle to make the fiber bundle move at a constant speed. The winding roller can drive the winding drum to rotate to wind the fiber bundle on the winding drum. The cutting component can cut the fiber between the clamping roller and the winding roller to divide the wound part and the unwound part of the fiber bundle.

[0073] Step S120: Control the winding component to wind the fiber bundle at a constant speed, and control the length detection component to detect the winding speed and the tension of the fiber bundle and generate a pressure signal.

[0074] In this step, control the clamping roller of the winding component to rotate at a constant speed to provide a stable traction force for the fiber bundle on the unwinding rack. In addition, as the winding time increases continuously, the amount of the fiber bundle wound on the winding drum gradually increases. Therefore, the rotation speed of the winding shaft of the winding component can be controlled to gradually decrease to avoid the fiber bundle between the winding shaft and the clamping roller from breaking due to the different linear speeds of the clamping roller and the winding shaft.

[0075] Step S130: Determine the current winding length of the fiber bundle according to the winding speed and the duration of generating the preset pressure signal. When the length detection component generates the preset pressure signal, it indicates that the fiber bundle does not slip relative to the winding component.

[0076] In this step, the length detection component includes a speed sensor. Since the rotation speed of the clamping roller remains unchanged, the speed sensor can be set to detect the speed of the clamping roller in the winding component as the winding speed of the winding component. The length detection component also includes a pressure sensor. The pressure sensor can detect the pressure of the fiber bundle during the winding process. The reason for the generation of the pressure is, for example, that the tension generated when the fiber bundle is pulled squeezes the pressure sensor.

[0077] Among them, the control unit can not only receive the pressure signal of the pressure sensor, but also count the duration of the pressure signal, and determine the current winding length of the fiber bundle according to the length equal to the product of the speed and the time.

[0078] It should be noted that in the fixed-length shearing device to which the shearing method provided in this embodiment is applied, by adapting the settings of the pressure sensor, the pressure sensor can detect different pressures when the fiber bundle is normally pulled by the clamping roller and when it slips. The control unit can judge whether the fiber bundle slips according to the reading of the pressure sensor, and calculate the current winding length using the duration of normal traction, which can avoid inaccurate length detection caused by slipping.

[0079] Step S140: Control the start and stop of the winding component and the cutting component according to the current winding length and the target winding length.

[0080] When the winding length is equal to the target length, the control unit can control the winding component to stop and control the cutting component to start cutting off the fiber bundle to complete the fixed-length shearing.

[0081] In the embodiment of the present application, the speed sensor can detect the speed of the fiber bundle being pulled in real time, and the pressure sensor can detect the tension generated when the fiber bundle is pulled and generate a preset pressure signal. When the fiber bundle slips relative to the winding component, the reading of the pressure sensor will change. Calculating the actual winding length based on the winding speed and the time of the preset pressure signal can avoid the situation of inaccurate length detection caused by fiber slipping, which is beneficial to making a fiber spool with an actual length consistent with the expected length to ensure the quality of the final product.

[0082] In some embodiments, the length detection component of the fixed-length shearing device includes a first pressure sensor, and the fixed-length shearing method may include the following steps:

[0083] Step S210: Determine the current winding length of the fiber bundle according to the product of the winding speed and the duration of the first preset pressure signal generated by the first pressure sensor.

[0084] In this step, the fiber bundle bends before and after passing through the first pressure sensor of the length detection component. When the winding component drives the fiber bundle to move, the fiber bundle generates tension and presses the first pressure sensor to generate a first preset pressure signal. When the fiber bundle slips relative to the winding component, the tension of the fiber bundle disappears and the reading of the first pressure sensor changes. Therefore, in this embodiment, the control unit is set to calculate the winding duration when the significance pressure sensor generates the first preset pressure signal, and based on the fact that length is the product of speed and time, the product of the winding speed and the duration of the first preset pressure signal is used as the current winding length.

[0085] In some embodiments, the pressure sensor of the length detection component further includes a second pressure sensor. The second pressure sensor is arranged after the fiber bundle passes through the length detection component of the fixed-length shearing device. The fixed-length shearing method further includes the following steps:

[0086] Step S310: Adjust the distance between the first support member and the second support member of the support structure of the length detection component to make the second pressure sensor generate a second preset pressure signal.

[0087] In this step, by adjusting the distance between the first support member and the second support member, the extrusion force between the first support member and the second support member can be adjusted, thereby changing the reading of the second pressure sensor. In this embodiment, before winding, the reading of the second pressure sensor is set to a preset value. During winding, if there are some short fiber filaments in the fiber bundle passing through the second pressure sensor, the reading of the second pressure sensor will decrease. That is, the control unit can judge whether the number of fiber filaments in the fiber bundle meets the standard according to the reading of the second pressure sensor. When the number of fiber filaments does not meet the standard, the control unit can control the winding assembly to stop winding.

[0088] In some embodiments, when the current winding length is equal to the target winding length, after the cutting assembly cuts off the fiber bundle to complete the fixed-length shearing, the fixed-length shearing method further includes the following steps:

[0089] Step S410: Control the winding bracket of the winding assembly to rotate around a preset rotating shaft, so that the winding cylinder winding the fiber bundle rotates to the unloading position, and the winding cylinder not winding the fiber bundle rotates to the winding position.

[0090] This step is for continuous automatic winding after winding is completed. After the winding bracket rotates to a position, the control unit can judge whether it rotates to the unloading position or the winding position according to the reading of the tension sensor on the winding roller.

[0091] Those of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk, or an optical disc, etc. Optionally, all or part of the steps of the above embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module / unit in the above embodiments can be implemented in the form of hardware or in the form of a software function module. The present invention is not limited to any specific form of combination of hardware and software.

[0092] After considering the specification and practicing the technical means of this application, those skilled in the art will easily think of other implementation schemes of this application. This application aims to cover any variations, uses, or adaptive changes of this application. These variations, uses, or adaptive changes follow the general principles of this application and include common general knowledge or conventional technical means in the technical field not claimed in this application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of this application are pointed out by the following claims.

[0093] It should be understood that this application is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is only limited by the appended claims.

Claims

1. A fixed-length shearing device, characterized in that: Used to cut the fiber bundle to a fixed length, the fixed length cutting device comprises: A winding component, used for winding the fiber bundle at a uniform speed; A cutting component, used for cutting and dividing the rolled-up part and the unrolled part when the rolled-up length of the fiber bundle reaches a target length; A length detection component, comprising a speed sensor and a pressure sensor, wherein the speed sensor is used to detect the winding speed of the winding component, and the pressure sensor is used to detect the tension generated when the fiber bundle is pulled by the winding component and generate a pressure signal; The control unit is electrically connected to the winding component, the cutting component and the length detection component. The control unit is used to determine the actual winding length according to the winding speed and the duration of the pressure signal, and control the cutting component to perform fixed-length cutting when the actual winding length is equal to the target winding length.

2. The cut-to-length device according to claim 1, characterized in that: The length detection assembly further includes a first support member, the pressure sensor includes a first pressure sensor, and the first pressure sensor is disposed on the first support member; In the operating state, the fiber bundle includes a first extension section and a second extension section connected to each other, and a connection position between the first extension section and the second extension section is in contact with the first support member or the first pressure sensor; The first extension section and the second extension section have a preset angle, and an opening of the preset angle formed by the first extension section and the second extension section faces the first support member and the first pressure sensor.

3. The cut-to-length device according to claim 2, characterized in that: The support structure further includes a second support member, and the pressure sensor further includes a second pressure sensor, and the second pressure sensor is disposed on the second support member; The first support member and the second support member are separate structures, and the first support member and the second support member are combined to form a wire passing channel.

4. The cut-to-length device according to claim 3, characterized in that: The length detection assembly also includes a distance adjustment mechanism, which is connected to the second support member. The adjustment mechanism is configured to adjust the distance between the first support member and the second support member to adjust the aperture of the wire passage.

5. The cut-to-length device according to claim 3 or 4, characterized in that: Along the arrangement direction of the first support member and the second support member, the first pressure sensor is arranged on a side of the first support member facing away from the second support member, and / or the second pressure sensor is arranged on a side of the second support member facing away from the first support member; Removable flannel is provided on opposite surfaces of the first supporting member and the second supporting member.

6. The cut-to-length device according to claim 1, characterized in that: The winding assembly comprises: A winding support, configured to be rotatable around a preset rotation axis; At least two winding rollers are arranged on the winding support and are evenly distributed along the circumferential direction of the preset rotating shaft; At least two winding drums are detachably mounted on the at least two winding rollers; A tension sensor is provided on the outer peripheral surface of the winding roller, and the tension sensor is electrically connected to the control unit.

7. A fixed-length cutting method, characterized in that: Applicable to the cut-to-length device according to any one of claims 1 to 6, the cut-to-length method comprising: Passing the fiber bundle through the length detection component of the fixed-length shearing device and winding it to the winding component; Controlling the winding component to wind the fiber bundle at a uniform speed, controlling the length detection component to detect the winding speed and the tension of the fiber bundle and generating a pressure signal based on the tension; Determine the current winding length of the fiber bundle according to the winding speed and the duration of generating the preset pressure signal, wherein when the length detection component generates the preset pressure signal, it indicates that the fiber bundle does not slip relative to the winding component; According to the current winding length and the target winding length, the start and stop of the winding component and the cutting component are controlled; wherein, when the current winding length is equal to the target winding length, the winding component is controlled to stop, and the cutting component is controlled to start to cut the fiber bundle to complete the fixed-length shearing.

8. The cut-to-length method according to claim 7, characterized in that: The pressure sensor of the length detection assembly includes a first pressure sensor, and the first pressure sensor is arranged on a first support member of the support structure of the length detection assembly; Determining the current winding length of the fiber bundle according to the winding speed detected by the speed sensor in the length detection component and the duration of the pressure signal generated by the pressure sensor includes: The current winding length of the fiber bundle is determined according to the product of the winding speed and the duration of the first preset pressure signal generated by the first pressure sensor.

9. The cut-to-length method according to claim 7, characterized in that: The pressure sensor of the length detection assembly further comprises a second pressure sensor, and the second pressure sensor is arranged on a second support member of the support structure of the length detection assembly; After the fiber bundle passes through the length detection component of the fixed-length shearing device, the method further comprises: The distance between the first support member and the second support member of the support structure of the length detection assembly is adjusted so that the second pressure sensor generates a second preset pressure signal.

10. The cut-to-length method according to any one of claims 7 to 9, characterized in that: When the current winding length is equal to the target winding length, after the cutting assembly is controlled to cut the fiber bundle to complete the fixed-length shearing, the method further includes: The winding support of the winding assembly is controlled to rotate around a preset rotating shaft, so that the winding drum with the wound fiber bundle is rotated to the unloading position, and the winding drum without the wound fiber bundle is rotated to the winding position.

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