Glass fiber yarn precursor winding tension online detection method

Abstract

The invention discloses a glass fiber yarn protofilament coiling tension online detection method. The method comprises the following steps that S1, the real-time total torque output by a servo motor of a machine head of a wire drawing machine is collected; s2, calculating a real-time load torque through the real-time total torque; s3, calculating the tension of the precursor spinning cake through the real-time load torque; s4, detecting the tension of the protofilament spinning cake, if the tension of the protofilament spinning cake is within a preset fluctuation range, keeping the wire drawing machine to run continuously, and if the tension of the protofilament spinning cake changes suddenly, stopping the wire drawing machine from running; according to the scheme, under the condition that an additional sensor is not needed, real-time measurement and monitoring of the glass fiber precursor coiling tension on the wire drawing machine can be achieved, meanwhile, a control signal is provided for automatic stopping of flying wires, efficient operation of the wire drawing machine is guaranteed, on one hand, the whole precursor coiling process can be more intelligent, and the production efficiency is improved. On the other hand, the production cost increased due to idling of the wire drawing machine can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of glass fiber drawing, and in particular relates to an online detection method for the winding tension of glass fiber yarn precursor. Background Art

[0002] To ensure a stable linear density during the glass fiber drawing process, the drawing machine drum typically rotates at a constant linear speed. However, the tension of the filament bundle varies with various external factors. This change in bundle tension can lead to problems such as lint and flying yarns, significantly impacting the formation of the yarn cake. Existing drawing machines often utilize additional tension sensors located at locations such as the bunching wheel to detect changes in yarn tension. However, the drawing operation environment is poor, with harsh environmental factors such as moisture, dust, and high temperatures significantly interfering with the tension sensor's real-time tension detection, often leading to measurement errors. Furthermore, if flying yarns break from the original bundle, the machine cannot automatically stop, causing the drawing machine to idle, reducing production efficiency and increasing production costs. Summary of the Invention

[0003] The purpose of the present invention is to provide an online detection method for the winding tension of glass fiber yarn precursor to address the above-mentioned shortcomings. It solves the problem in the prior art that during the detection of the drawing tension, due to the poor drawing working environment, harsh environmental factors such as moisture, dust, and high temperature, there is a large interference to the real-time tension detection of the tension sensor, which often leads to measurement errors. At the same time, it solves the problem in the prior art that the original yarn bundle cannot be automatically stopped when the flying wire is broken, the drawing machine runs idle, and the production cost is increased.

[0004] The present invention is achieved through the following solutions:

[0005] A method for online detection of the winding tension of a glass fiber yarn precursor comprises the following steps:

[0006] Step S1: collecting the real-time total torque output by the servo motor of the wire drawing machine head;

[0007] Step S2: Calculate the real-time load torque through the real-time total torque;

[0008] Step S3: Calculate the tension of the raw silk cake through the real-time load torque;

[0009] Step S4: By detecting the tension of the raw silk cake, if the tension of the raw silk cake is within a predetermined fluctuation range, the wire drawing machine is kept running; if the tension of the raw silk cake suddenly changes, the wire drawing machine is stopped.

[0010] In step S1, the real-time total torque output by the servo motor of the wire drawing machine head is collected by converting the torque analog voltage signal in the servo controller into a specific real-time torque value through the PLC, or directly obtaining the torque data in the servo driver through the digital communication interface.

[0011] Specifically, in step S2 , the real-time total torque includes the real-time total friction torque and the real-time load torque; and the real-time load torque is obtained by calculating the real-time total torque minus the real-time total friction torque=the real-time load torque.

[0012] In step S3, the real-time tension of the raw silk cake is calculated by the real-time load torque, which specifically includes the following steps:

[0013] Step S31, recording the no-load-speed table, recording the no-load torque at different speeds, and obtaining a no-load torque and speed correspondence table of the wire drawing machine motor. The no-load torque at this time is the total friction torque;

[0014] Step S32, calculate the real-time load torque, through the real-time total torque - no-load torque at the current speed = real-time load torque, the no-load torque at the current speed can be obtained by looking up the table in step S31, that is, the corresponding value is automatically obtained by the PLC for corresponding processing;

[0015] Step S33, calculating the real-time radius of the raw yarn cake, and calculating the real-time radius of the raw yarn cake through PLC according to the winding length obtained by the length sensor of the wire drawing machine.

[0016] The specific formula is:

[0017] Where R: radius of the original silk cake;

[0018] R0: initial core radius;

[0019] T: yarn linear density;

[0020] L: coiling length;

[0021] H: package width;

[0022] ρ: yarn bulk density.

[0023] Step S34, calculating the real-time tension of the precursor, using the formula: real-time tension on the precursor = real-time load torque obtained in step S32 / real-time radius of the precursor cake obtained in step S33.

[0024] When the real-time tension of the raw wire does not meet the preset tension requirements, the raw wire tension is adjusted by adjusting the position and angle of the device on the raw wire movement path, adjusting the operating temperature of the wire drawing plate, adjusting the position of the plate cooler and its cooling water flow, so that the tension meets the preset requirements.

[0025] Specifically, this is achieved by adjusting the speed of the wire drawing machine, or adjusting the inclination angle of the bunching wheel and the wire drawing in the previous process, or adjusting the operating temperature of the wire drawing bushing, adjusting the position of the bushing cooler and its cooling water flow.

[0026] In step S4, if the tension of the raw silk cake changes suddenly, the wire drawing machine is stopped. Specifically, when the wire breaks, the real-time load torque is zero. When the PLC detects that the real-time total torque of the motor is equal to the real-time total friction torque, the shutdown signal is triggered.

[0027] The real-time total friction torque specifically includes the motor bearing friction torque, the brush and commutator friction torque, and the windage friction torque.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. This solution can achieve real-time measurement and monitoring of the glass fiber precursor winding tension on the wire drawing machine without adding additional sensors. It also provides a control signal for the automatic stop of the flying wire to ensure the efficient operation of the wire drawing machine. On the one hand, it can make the entire precursor winding process more intelligent, and on the other hand, it can reduce the production costs increased by the idling of the wire drawing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall process of the present invention. DETAILED DESCRIPTION

[0031] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0032] Any feature disclosed in this specification (including any appended claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0033] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a predetermined direction, be constructed and operated in a predetermined direction, and therefore cannot be understood as a limitation on the present invention.

[0034] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of such features.

[0035] Example 1

[0036] like Figure 1 As shown, the present invention provides a technical solution:

[0037] A method for online detection of the winding tension of a glass fiber yarn precursor comprises the following steps:

[0038] Step S1: collecting the real-time total torque output by the servo motor of the wire drawing machine head;

[0039] Step S2: Calculate the real-time load torque through the real-time total torque;

[0040] Step S3: Calculate the tension of the raw silk cake through the real-time load torque;

[0041] Step S4: By detecting the tension of the raw silk cake, if the tension of the raw silk cake is within a predetermined fluctuation range, the wire drawing machine is kept running; if the tension of the raw silk cake suddenly changes, the wire drawing machine is stopped.

[0042] Based on the above structure, this solution can realize real-time measurement and monitoring of the glass fiber raw yarn winding tension on the wire drawing machine without adding additional sensors, and at the same time provide control signals for automatic parking of the flying wire to ensure the efficient operation of the wire drawing machine. On the one hand, it can make the entire raw yarn winding process more intelligent, and on the other hand, it can reduce the production cost increased due to idling of the wire drawing machine.

[0043] As an example, in step S1, the real-time total torque output by the servo motor of the wire drawing machine head is collected by converting the torque analog voltage signal in the servo controller into a specific real-time torque value through PLC, or directly obtaining the torque data in the servo driver through the digital communication interface.

[0044] This solution uses two different data collection methods to ensure that the selection is based on the actual situation on site, which allows for greater flexibility in processing.

[0045] As an example, in step S2 , the real-time total torque includes the real-time total friction torque and the real-time load torque; the real-time load torque is obtained by calculating the real-time total torque minus the real-time total friction torque=the real-time load torque.

[0046] The real-time total friction torque may specifically include the motor bearing friction torque, the brush and commutator (or slip ring) friction torque, and the windage friction torque.

[0047] As an example, in step S3, the real-time tension of the raw silk cake is calculated by the real-time load torque, which specifically includes the following steps:

[0048] Step S31, recording the no-load-speed table. Since the real-time total friction torque will vary at different speeds due to differences in lubrication, windage, etc., the no-load torque at different speeds is recorded to obtain a no-load torque and speed correspondence table of the wire drawing machine motor. The no-load torque at this time is the total friction torque;

[0049] Step S32, calculate the real-time load torque, through the real-time total torque - no-load torque at the current speed = real-time load torque, the no-load torque at the current speed can be obtained by looking up the table in step S31, that is, the corresponding value is automatically obtained by the PLC for corresponding processing;

[0050] Step S33, calculating the real-time radius of the raw yarn cake, and calculating the real-time radius of the raw yarn cake through PLC according to the winding length obtained by the drawing machine length sensor (the average radius is used for the tapered yarn cake);

[0051] The specific formula is:

[0052] Where R: radius of the original silk cake (m);

[0053] R0: initial core radius (m);

[0054] T: yarn linear density (tex, g / km);

[0055] L: coiling length (m);

[0056] H: package width (m);

[0057] ρ: Yarn bulk density (g / m3, can be yarn material density or corrected density).

[0058] Step S34, calculating the real-time tension of the precursor, using the formula: real-time tension on the precursor = real-time load torque obtained in step S32 / real-time radius of the precursor cake obtained in step S33.

[0059] When the real-time tension of the raw wire does not meet the preset tension requirements, the raw wire tension is adjusted by adjusting the position and angle of the device on the raw wire movement path, adjusting the operating temperature of the wire drawing plate, adjusting the position of the plate cooler and its cooling water flow, so that the tension meets the preset requirements.

[0060] Specifically, this is achieved by adjusting the speed of the wire drawing machine, or adjusting the inclination angle of the bunching wheel and the wire drawing in the previous process, or adjusting the operating temperature of the wire drawing bushing, adjusting the position of the bushing cooler and its cooling water flow.

[0061] As an example, in step S4, if the tension of the original wire cake suddenly changes, the wire drawing machine will be stopped. Specifically, when the wire breaks, the real-time load torque is zero. When the PLC detects that the real-time total torque of the motor is equal to the real-time total friction torque, the shutdown signal is triggered.

[0062] This method calculates the real-time tension of the raw yarn using the real-time load torque. In the PLC calculation, the real-time load torque is deducted from the total friction torque. This is combined with the winding radius in the corresponding table of winding length and winding radius to obtain the real-time tension of the raw yarn during winding. When the yarn is flying (i.e., when the winding yarn breaks), a large tension mutation occurs. This mutation signal is set as the trigger of the motor stop signal in the PLC, which can automatically shut down the wire drawing machine due to flying yarn.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for online detection of glass fiber yarn winding tension, characterized in that: The following steps are involved: Step S1: collecting the real-time total torque output by the servo motor of the wire drawing machine head; Step S2: Calculate the real-time load torque through the real-time total torque; Step S3: Calculate the tension of the raw silk cake through the real-time load torque; Step S4: By detecting the tension of the raw silk cake, if the tension of the raw silk cake is within a predetermined fluctuation range, the wire drawing machine is kept running; if the tension of the raw silk cake suddenly changes, the wire drawing machine is stopped.

2. The method for online detection of winding tension of glass fiber yarn according to claim 1, characterized in that: In step S1, the real-time total torque output by the servo motor of the wire drawing machine head is collected by converting the torque analog voltage signal in the servo controller into a specific real-time torque value through the PLC, or directly obtaining the torque data in the servo driver through the digital communication interface.

3. The method for online detection of winding tension of glass fiber yarn according to claim 2, characterized in that: Specifically, in step S2 , the real-time total torque includes the real-time total friction torque and the real-time load torque; and the real-time load torque is obtained by calculating the real-time total torque minus the real-time total friction torque=the real-time load torque.

4. The method for online detection of winding tension of glass fiber yarn according to claim 3, characterized in that: In step S3, the real-time tension of the raw silk cake is calculated by the real-time load torque, which specifically includes the following steps: Step S31, recording the no-load-speed table, recording the no-load torque at different speeds, and obtaining a no-load torque and speed correspondence table of the wire drawing machine motor. The no-load torque at this time is the total friction torque; Step S32, calculate the real-time load torque, through the real-time total torque - no-load torque at the current speed = real-time load torque, the no-load torque at the current speed can be obtained by looking up the table in step S31, that is, the corresponding value is automatically obtained by the PLC for corresponding processing; Step S33, calculating the real-time radius of the raw yarn cake, and calculating the real-time radius of the raw yarn cake through PLC according to the winding length obtained by the length sensor of the wire drawing machine.

5. The method for online detection of winding tension of glass fiber yarn according to claim 4, characterized in that: The specific formula is: Where R: radius of the original silk cake; R0: initial core radius; T: yarn linear density; L: coiling length; H: package width; ρ: yarn bulk density.

6. The method for online detection of winding tension of glass fiber yarn according to claim 5, characterized in that: Step S34, calculating the real-time tension of the precursor, using the formula: real-time tension on the precursor = real-time load torque obtained in step S32 / real-time radius of the precursor cake obtained in step S33.

7. The method for online detection of winding tension of glass fiber yarn according to claim 6, characterized in that: When the real-time tension of the raw wire does not meet the preset tension requirements, the raw wire tension is adjusted by adjusting the position and angle of the device on the raw wire movement path, adjusting the operating temperature of the wire drawing plate, adjusting the position of the plate cooler and its cooling water flow, so that the tension meets the preset requirements.

8. The method for online detection of winding tension of glass fiber yarn according to claim 7, characterized in that: Specifically, this is achieved by adjusting the speed of the wire drawing machine, or adjusting the inclination angle of the bunching wheel and the wire drawing in the previous process, or adjusting the operating temperature of the wire drawing bushing, adjusting the position of the bushing cooler and its cooling water flow.

9. The method for online detection of winding tension of glass fiber yarn according to claim 8, characterized in that: In step S4, if the tension of the raw silk cake changes suddenly, the wire drawing machine is stopped. Specifically, when the wire breaks, the real-time load torque is zero. When the PLC detects that the real-time total torque of the motor is equal to the real-time total friction torque, the shutdown signal is triggered.

10. The method for online detection of winding tension of glass fiber yarn according to claim 9, characterized in that: The real-time total friction torque specifically includes the motor bearing friction torque, the brush and commutator friction torque, and the windage friction torque.

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