KR20010103312A - a thread-tension and thread-length controller - Google Patents

Abstract

The comparator compares the sensor means for detecting the tension of the yarn of the final stage using a strain gauge, the amplifying means for amplifying the output of the sensor means, and the output signal divided by the phase difference of the three phases of the motor. By measuring the length of the yarn to be measured as the pulse output in accordance with the change of phase by inducing magnetization by rotation, the display means for displaying the operating state on the screen, and a small oil-free metal bearing Actuator means for maintaining the tension of the thread at the required tension using a brushless motor, cutting means for cutting the thread, and the change in tension and working conditions measured by the communication protocol to the central system. Communication means for storing the material, and for keeping the tension constant according to the amount of change in tension. It includes a control means for outputting a signal, the tension is detected directly by using a tension sensor to control the tension so that the tension can be precisely controlled, by using a small brushless motor using an oil-free metal bearing At the same time, to provide a tension and deadweight control device that can be remotely controlled using two-way communication.

Description

Tension and Thread Controllers {a thread-tension and thread-length controller}

The present invention relates to a tension and deadweight control device, and more specifically, to a small brushless motor using oil-free metal bearings to precisely control the tension by detecting the tension directly by using a tension sensor to control the tension. The present invention relates to a tension and dead-weight control device capable of increasing the lifespan by using and at the same time remotely using two-way communication.

In general, a weaving machine for weaving fabrics includes a twister for twisting a thread, and a winder (winder preparation machine) that winds up to prepare a twisting process by the twister. The winder has a tension controller attached to the roll to keep the tension of the thread constant, and has an operating characteristic of calculating the length of the thread and cutting it. If the tension of the thread is not constant, the actual length of the thread hanging on each axis is all different, and thus the remaining thread (residue) is discarded after the final work, so the role of the tension controller is very important.

However, the conventional tension controller has a problem that it is difficult to precisely control the tension because it controls the tension by detecting the yarn speed instead of sensing the tension to maintain the yarn speed constant.

In addition, the conventional tension controller is mechanically designed to maintain the tension of the yarn by varying the cross angle of the yarn simply by the elastic force to the extent that the path simply crosses when the yarn passes by the elastic force of the spring. Should be added, there is a problem that the tension deviation caused thereby.

In addition, the conventional tension controller has a problem that can not be diagnosed because the device can be set only by unidirectional communication.

Although there are many such problems, it is urgent to develop a device for overcoming the situation since an effective and proper device for solving the above problems is not developed.

An object of the present invention is to solve such a conventional problem, by using a tension sensor to directly detect the tension to control the tension so that the tension can be precisely controlled, small brushless motor using an oil-free metal bearing In order to increase the lifespan by using, and to provide a tension and the deadweight control device that can be remotely controlled by using two-way communication.

Another object of the present invention is to allow the pre-tenser at the front end of the rotating pulley to cross the thread so that it can act as a buffer when the motor is controlled to maintain the tension change of the thread, It is to provide a tension and deadweight control device to have a spring elastic force within a proper to prevent excessive tension is applied.

1 is a block diagram of a tension and deadweight control device according to an embodiment of the present invention.

2 is a perspective view of a tension and dead zone control device according to an embodiment of the present invention.

3 is a plan view of a tension and dead zone control device according to an embodiment of the present invention.

4 is a side view of the tension and dead zone control device according to an embodiment of the present invention.

5 is a main configuration diagram of a tension and dead zone control device according to an embodiment of the present invention.

Figure 6 is a block diagram of a guide of the tension and dead sand control device according to an embodiment of the present invention.

7 is a cross-sectional structural view of the pulley and the motor of the tension and deadweight control device according to an embodiment of the present invention.

8 is a configuration diagram of a sensor unit of a tension and dead zone control device according to an embodiment of the present invention.

9 is a configuration diagram of a strain gauge of a tension and dead zone control device according to an embodiment of the present invention.

10 is a signal waveform diagram input to the central processor of the tension and deadweight control device according to an embodiment of the present invention.

FIG. 11 is a signal waveform diagram filtered by a central processor of a tension and deadlock controller according to an embodiment of the invention. FIG.

Explanation of symbols on the main parts of the drawings

10: sensor unit 20: amplification unit

30: key input unit 40: electric corner

50: display driver 60: screen display

70: dedicated control comparator 80: amplifier

90: actuator 100: cutting drive

110: cutting unit 120: communication converter

130: central processor

As a means for achieving the above object, the configuration of the present invention includes a sensor means for detecting the tension of the yarn of the final stage by using a strain gauge, an amplifying means for amplifying the output of the sensor means, and a motor. By comparing the output signal divided by the phase difference of the phase by the comparator and inducing magnetization by the rotation, the dead-measuring means for measuring the length of the yarn to be measured and outputted in pulse according to the phase change, and the operation state on the screen Display means for displaying, actuator means for maintaining the tension of the seal at the required tension using a small brushless motor using an oil-free metal bearing, cutting means for cutting the seal, and a communication protocol. Communication means to communicate the changes in measured tension and working conditions to the central system for data storage , It comprises a control means for outputting a control signal to maintain a constant tension according to the amount of change in the tension.

DETAILED DESCRIPTION Hereinafter, the most preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. . For reference, the embodiments disclosed herein are only presented by selecting the most preferred examples to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment. .

As shown in Fig. 1 to Fig. 5, the structure of the tension and dead-weight control device according to the embodiment of the present invention, the sensor unit 10 for detecting the tension of the yarn of the final stage, and the sensor unit ( Amplification section 20 for amplifying the output of 10), key input section 30 for the user to input commands and data, and output signals divided by the phase difference of the three phases of the motor are compared and rotated by a comparator By inducing magnetization by the electric angle portion 40 for measuring the length of the room to be measured by the pulse in accordance with the change of phase, the display driver 50 for operating the screen display 60, the operation state Comparison of the dedicated display for driving the motor installed in front of the sensor which combines the screen display 60 for displaying on the screen and the input PWM signal with the output PWM signal of 100KHz or more and transmits it to the actuator 90 and controls the speed of the seal. (70), an amplifier (80) for amplifying the output of the dedicated control comparator (70), an actuator (90) for maintaining the tension of the thread at the required tension, and operating the cutting section (110). It is possible to automatically measure the change in the tension of the winder to detect and measure the setting and the state by the cutting drive unit 100 for cutting, the cutting unit 110 for cutting the thread, and the system bidirectional communication protocol Communication converter 120 for transferring the changed tension and working conditions to the central system to store data, and a central processor for calculating the control amount based on the change in tension and converting the control amount into a PWM signal and outputting it. 130 is made.

By the above-described configuration, the action of the tension and the deadweight control device according to an embodiment of the present invention is as follows.

When the sensor unit 10 actually detects the tension by using the strain gauge and converts it into an electrical signal and outputs it, the amplification unit 20 amplifies it and outputs it to the central processor 130. The sensor unit 10 also uses a strain gauge capable of detecting a minute displacement of the force applied to the sensor unit 10 so as to detect a change in tension caused by a minute change in yarn speed.

As shown in FIG. 8, the sensor unit 10 is provided with strain gauges 16 on both sides of the leaf spring 15 so that the spring plate 15 causes displacement when a change in the tension of the seal occurs. Made of structure. As shown in FIG. 9, the strain gauge 16 is formed in a bridge form with two reference resistors 14, and the conventional four strain gauges are different from the load cell method. Alternatively, the two strain gauges can be connected in the form of a bridge to detect minute displacements and have a fast response with a maximum delay time of 20usec. The sensor unit 10 digitizes and outputs the detected change in tension through an analog-to-digital converter, so that the central processor 130 recognizes the tension value.

In the signal input from the sensor unit 10 to the central processor 130, since the vibration generated in the operation of the weaving machine, as shown in Figure 10 is input three times or more to the amount of change in the tension, the central processor 130 In order to detect the normal tension signal from the noise signal generated by the vibration of the machine, the software employs a software technique to remove the noise by the median filter method, thereby showing the normal tension signal as shown in FIG. Select only to use. The central processor 130 uses a dedicated processor that operates at a high frequency PWM frequency of about 100KHz to react within 30msec even at high speed.

In the central processor 130, when the tension is measured and sensed, the deviation of the set tension value and the measured tension value is calculated and the rotational force change of the motor is induced by inducing the operation of the motor of the actuator 90 to the required operation through a calculation operation. Torque is induced to change the tension of the thread.

As shown in FIG. 7, the motor uses a three-phase induction electric motor, which is generally used, consisting of a coil and a magnet. The central processor 130 uses a rotating force generated by a phase shift of the motor to seal the seal. The tension of the seal is maintained or changed by driving and braking to change the rotation of the motor via the pulley 97 connected to the motor shaft 91.

The three-phase induction electric motor used to maintain the tension is applied to the brushless type, and the ball bearing is used to prolong the life in response to the high speed change during the long time use of the motor. Without use, the oilless metal bearing (92) and the motor shaft (91) By processing to maintain the error of, it prevents shortening of life due to heat generation and PP current limit is applied through heat release and overload limit by regenerative heat to prevent heat generation by change of torque of motor. In addition, in order to press-fit the driving shaft of the motor shaft 91 into the pulley 97 with a force of 10-40 Kg, it is managed with a tolerance within 3 microns.

The present invention, unlike the conventional tension control method using the elastic force of the spring, by rotating the pulley 97 in the transfer of the yarn by changing the inertial force of the rotation by the motor and the tension measured after the rotation of the motor is made By appropriately adjusting the rotational force of the motor to maintain a constant tension. That is, the central processor 130 adjusts the balance between the rotational force of the motor and the measured value of the sensor unit 10 so that the tension can be maintained in accordance with the set tension, and the rotational force of the motor to match the balance value thus adjusted. Will change.

In addition, a pretensioner 95 is installed between the input change tension and the tension maintaining motor to cross the path of the seal two or more times so as to buffer the change in the length of the seal due to the change in the rotation of the motor. By means of the leaf spring, the arm of the pretensioner 95 is buffered by a constant force, thereby supplying the displacement necessary to maintain the changed tension on the input side by the motor, and by the pretensioner 95 described above. At the surface of the pulley 97, the seal and the pulley 97 do not swing and maintain a constant friction force.

In addition, in order to reduce the error in the length of the yarn caused by the sliding of the yarn and the pulley 97, an oxide film treatment is performed on the surface of the pulley 97 to strengthen the aluminum surface, and then DLC ( Diamond Like Carbon) improves the lifespan reduction by friction of the surface. In addition, in order to reduce the response delay caused by the rotational inertia, aluminum is processed to a thickness of 3 mm or less, and in order to prevent deformation even in oxide film treatment and DLC deposition, it is processed by applying a low temperature deposition of 200 degrees or less.

In the central processor 130, the length of the thread is measured and the cutting part 110 is operated through the cutting driving part 100 to cut the thread to a constant length. The output pulse to be used is used. That is, the central processor 130 measures the length of the yarn by detecting the rotation speed of the pulley 97 connected to the motor shaft 91 by using the output pulse output by the phase shift of the motor. In general, the phase control method of an inverter used to drive a three-phase induction motor is applied.

In addition, the central processor 130 controls the cutting of the thread together with braking of the motor to prevent the thread from being entangled by free rotation due to the rotational inertia, which becomes a problem at the end of the work by applying the motor to the tension control.

In the cutting unit 110, an operation for cutting the thread is performed by fixing the ceramic guide 111 for transport and fixing the cutting knife 112 to the guide 111. In the process of cutting the thread as described above, the central processor 130 brakes the motor attached to the front end of the sensor for stable cutting of the thread to maintain a large tension between the bobbin and the tension-maintaining motor and then cut the thread. Then, the continuous operation of the pulley 97 is stopped by braking of the motor through which the thread passes, thereby preventing the thread from being wound around the pulley 97.

The central processor 130 enables the automatic setting management and operation by the automatic recognition communication protocol by using the communication converter 120 to be connected and removed during operation. Previously, only one-way communication was possible. However, in the present invention, the state of each node is periodically read or stored through the two-way communication so that the command and the state can be checked and the two-way communication can be automatically diagnosed and recognized. use.

The CPU 130 may input or control data by the user through the key input unit 30, and output the result generated during the operation process to the screen display unit 60 through the display driver 50. Allow the user to verify this.

In the present invention, the DC-DC converter supplies + 5V, + 12V, and + 24V only with an external single power source, and also suppresses the current loss so that the maximum current does not exceed 1A.

In addition, in order to eliminate the poor operation of the sensor due to the vibration vibration to manufacture a frame that can be fixed to the parts in the case assembled. In addition, ABS resin and an antistatic liquid are mixed to prevent the bad operation of the apparatus and harmful radio waves by electromagnetic waves, and a special paint is mixed to maintain the strength of the plastic.

As described above, according to the embodiment of the present invention, by detecting the change in the tension caused by the change in the firing speed by the sensor, and adjusts the tension in response to the change in the detected tension to the externally applied tension change element It is possible to fundamentally block the problems caused by the high quality fiber production is possible.

In addition, according to an embodiment of the present invention, the overall tension management by the remote control is enabled to detect the work tension according to the process of each operation and to control it in the central control room to maintain the tension of the worked process Supervision and quality control of production are possible.

In addition, according to the embodiment of the present invention, the basis of the work by the standardized tension is provided, it is possible to precisely manage the tension and the application work according to the characteristics of the production fiber.

In addition, according to the embodiment of the present invention, in order to measure the change of the micro tension which cannot be controlled by the machine and to stabilize the micro tension, the control is performed to stabilize the tension by applying a miniaturized high-power motor, and accordingly, Correspondingly, stable tension is maintained, and the tension is managed by the microprocessor to control the failure due to tension, and the measured tension and the dead flux are transmitted to the main system for storage and maintenance.

In addition, according to the embodiment of the present invention, by enabling the operation by the change in the tension caused by the change in the yarn speed of the spindle generated in the textile machine and the stable tension generated in the winder process, it is possible to produce a high-quality quality, tension management By doing so, the production quality of the product can be improved.

In addition, according to the embodiment of the present invention, it is possible to control and manage the setting and the work status by the network (Network) network, and thus to establish a basis for preventing bad work by strictly controlling the bad work, Additional applications can be connected and controlled and managed by a central system.

In addition, according to the embodiment of the present invention, by processing the given strain of the tension by the arrangement of the arbitrary tension pattern enables a unique fiber processing to change the continuous tension.

Claims (6)

The comparator compares the sensor means for detecting the tension of the yarn of the final stage using a strain gauge, the amplifying means for amplifying the output of the sensor means, and the output signal divided by the phase difference of the three phases of the motor. By measuring the length of the yarn to be measured as the pulse output in accordance with the change of phase by inducing magnetization by rotation, the display means for displaying the operating state on the screen, and a small oil-free metal bearing Actuator means for maintaining the tension of the thread at the required tension using a brushless motor, cutting means for cutting the thread, and the change in tension and working conditions measured by the communication protocol to the central system. Communication means for storing the material, and for keeping the tension constant according to the amount of change in tension. And a tension control device, characterized in that the boss comprises a control means for outputting a signal. The method of claim 1, wherein the small brushless motor has an oilless metal bearing and a motor shaft. Tension and boss control device, characterized in that processed to maintain the error of. The method of claim 1, wherein the small brushless motor is subjected to an oxide film treatment for reinforcing an aluminum surface together with a sending treatment on the surface of the pulley in order to reduce an error in the length of the yarn caused by the sliding of the thread and the pulley. Tension and dead-weight control device characterized by DLC (Diamond Like Carbon) deposition. The device of claim 1, wherein the strain gauge is bridged with two reference resistors in circuit form using two strain gauges. The tension control device according to claim 1, wherein the control means controls to cut the thread together with braking of the motor to prevent the thread from being entangled by free rotation due to the rotational inertia of the motor which becomes a problem at the end of the work. Boss control. The method of claim 1, wherein the communication means reads and stores the state of each node periodically through bidirectional communication, commands and checks the status, and makes it possible to diagnose and recognize automatically. Boss control.