JP2022511861A - Wire tension controller and method - Google Patents

Abstract

The control device for controlling the tension of the wire according to the embodiment of the present disclosure is an unwinding roller that supplies the wire by rotation; a motor that rotates the unwinding roller; a wire supplied by the unwinding roller. A tension roller that supports the tension of the tension roller and can move along the uniaxial path; an air cylinder that applies pressure to the tension roller to support the tension of the wire; measures the position of the tension roller on the uniaxial path. , A linear potential meter that converts the position into a voltage value; and a control unit for controlling a motor and an air cylinder.

Description

The present disclosure relates to a wire tension control device and method, and more particularly to a control device and method for controlling the tension of a wire supplied to a winding device.

Recently, the spread of electric vehicles has been accelerating with the development of secondary battery technology and government subsidy policies. As a result, there is an increasing demand for miniaturization, weight reduction, and high output of drive motors mounted on electric vehicles. To achieve this, various methods of winding wires around coils are being studied.

In particular, it is necessary to precisely control the tension applied to the wire in the process of winding the wire. The wire tension may fluctuate due to the difference in wire characteristics, or even if the same wire is continuously wound, the wire tension may fluctuate due to the fluctuation of the load of the winding device. If the tension of the wound wire is not kept constant and fluctuates, the winding shape may be deformed, which may cause quality deterioration. Therefore, it is necessary to precisely control the tension of the wound wire to maintain it constant.

In the embodiments disclosed herein, the wire tension can be maintained constant and the wire can be prevented from being broken by controlling the tension applied to the wire by the tension roller in the process of winding the wire. Provide possible devices and methods.

The embodiments disclosed herein provide an apparatus and a method capable of adjusting the position of a tension roller when the tension applied to the wire by the tension roller is controlled to be constant in the process of winding the wire.

The control device for controlling the tension of the wire according to the embodiment of the present disclosure is an unwinding roller that supplies the wire by rotation; a motor that rotates the unwinding roller; a wire supplied by the unwinding roller. A tension roller that supports the tension of the wire and can move along the uniaxial path; an air cylinder that applies pressure to the tension roller to support the tension of the wire; measures the position of the tension roller on the uniaxial path. A linear potentiometer that converts the position into a voltage value; and a control unit for controlling a motor and an air cylinder. The control unit controls the pressure of the air cylinder to adjust the tension of the wire. The control unit controls the rotation speed of the motor based on the voltage value converted by the linear potentiometer.

The control unit changes the rotation speed of the motor when the voltage value converted by the linear potentiometer deviates from the threshold voltage value.

The control unit increases the rotational speed of the motor when the voltage value converted by the linear potentiometer exceeds the threshold voltage value.

The threshold voltage value corresponds to the voltage value when the position of the tension roller is located in the center on the uniaxial path.

The direction of the uniaxial path is parallel to the traveling direction of the wire via the tension roller.

The wire tension control device further includes an auxiliary roller for assisting the tension roller, the wire supplied by the unwinding roller is supplied to the tension roller via the auxiliary roller, and the auxiliary roller is a uniaxial path of the tension roller. It is placed deviating from.

The wire tension control device further includes a sensing roller equipped with a pressure sensor for measuring the tension of the wire passing through the tension roller, which provides the pressure value measured by the pressure sensor to the control unit and the control unit. Controls the pressure of the air cylinder based on the pressure value.

A pressure sensor mounted on the sensing roller measures the pressure applied by the wire to the sensing roller in the direction perpendicular to the traveling direction of the wire.

The motor corresponds to a servo motor (Servo Motor).

The control method for controlling the tension of the wire according to the embodiment of the present disclosure is a step in which the wire tension value is input via the constant pressure regulator; the control unit controls the pressure of the air cylinder based on the wire tension value. Step; The step of measuring the position of the tension roller to which the air cylinder applies pressure on the uniaxial path by the linear potentiometer and converting the position of the tension roller into the voltage value; and the control unit sets the wire based on the voltage value. The tension roller is movable on a uniaxial path and supports the tension of the wire supplied by the unwinding roller, including a step of controlling the rotational speed of the motor that rotates the unwinding roller.

In the step where the control unit controls the rotation speed of the motor that rotates the unwinding roller that supplies the wire based on the voltage value, the control unit changes the rotation speed of the motor when the voltage value deviates from the threshold voltage value. Control to do so.

In the step where the control unit controls the rotation speed of the motor that rotates the unwinding roller that supplies the wire based on the voltage value, the control unit increases the rotation speed of the motor when the voltage value exceeds the threshold voltage value. Control to let.

The threshold voltage value corresponds to the voltage value when the position of the tension roller is located in the center on the uniaxial path.

It further includes the step of measuring the tension of the wire passing through the tension roller by the pressure sensor.

It further includes a step of controlling the pressure of the air cylinder based on the measured wire tension.

According to the various embodiments of the present disclosure, the tension applied to the wire by the tension roller and the air cylinder can be precisely controlled.

According to various embodiments of the present disclosure, in the process of controlling the tension applied to the wire by the tension roller and the air cylinder, the rotation speed of the unwinding roller is controlled according to the position of the tension roller measured by the linear potentiometer. By doing so, it is possible to adjust the position of the tension roller.

The effects of the present disclosure are not limited thereto, and other effects not mentioned should be clearly understood by those skilled in the art from the description of the claims.

The embodiments of the present disclosure will be described with reference to the following accompanying drawings. Here, similar reference numbers indicate similar elements, but are not limited thereto.

It is a figure which shows the main part of the wire tension control apparatus by one Example of this disclosure. It is a figure which shows the rear surface of the wire tension control apparatus disclosed in FIG. It is explanatory drawing which shows the example which the tension roller of a wire tension control device moves on a uniaxial path by one Example of this disclosure. It is explanatory drawing which shows the example which the tension roller of a wire tension control apparatus moves on a uniaxial path by another embodiment of this disclosure. It is an exemplary diagram which shows the example which controls the rotation speed of the motor which rotates the unwinding roller when the unwinding roller of a wire tension control device supplies a wire by one Embodiment of this disclosure. It is a sequence diagram which shows the wire tension control method by one Example of this disclosure. It is a figure which shows the main part of the wire tension control apparatus by another embodiment of this disclosure.

Hereinafter, the specific contents for carrying out the present disclosure will be described in detail based on the attached drawings. However, in the following description, if there is a risk of unnecessarily blurring the gist of the present disclosure, specific description of known functions and configurations will be omitted.

In the accompanying drawings, the same or corresponding components are given the same reference numerals. Further, in the following description of the embodiment, duplicate description of the same or corresponding components may be omitted. However, even if the description of a component is omitted, it should not be intended that such a component is not included in the embodiment. Terms that describe relative positions can be used to describe the relationships between the configurations shown in the drawings, and the present disclosure is not limited to such terms.

FIG. 1 is a diagram showing a main part of the wire tension control device 100 according to an embodiment of the present disclosure, and FIG. 2 is a diagram showing the rear surface of the wire tension control device 100 disclosed in FIG.

The directions of the X-axis and the Y-axis shown in FIGS. 1 and 2 mean a positive direction, and are used as the same meaning in other figures.

The wire tension control device 100 includes an unwinding roller 110, a motor 120, a tension roller 140, an air cylinder 150 (see FIG. 2), a linear potentiometer 170 (see FIG. 2), and a control unit (shown). Can include). The wire tension control device 100 can further include an auxiliary roller 130 and a sensing roller 180.

The unwinding roller 110 is a roller for supplying the wire. For example, the unwinding roller 110 can supply the wire wound around the bobbin (not shown) to the winding device (not shown) via the wire tension control device 100, and is supplied to the winding device. The wire can be wound around the coil. The bobbin can be located on the left side of the wire tension control device 100 (negative direction of the X axis shown in FIG. 1, not shown), and the winding device is on the right side of the wire tension control device 100 (X shown in FIG. 1). Can be placed in the positive direction of the axis, not shown). At this time, the direction in which the wire is wound or the wire traveling direction can correspond to the right side direction (the positive direction of the X axis shown in FIG. 1).

The unwinding roller 110 can be rotated by the motor 120 coupled to the unwinding roller 110, and the wire can be supplied by the rotation. The unwinding roller 110 can be connected to the motor 120 via a rotation shaft located at the center of the unwinding roller 110. One end of the rotating shaft can be coupled to the unwinding roller 110 and the other end can be coupled to the motor 120. The motor 120 can supply wires by rotating the unwinding roller 110 in one direction based on a control signal from a control unit (not shown). The motor 120 can correspond to a servo motor. When a servomotor is used, the rotation speed of the unwinding roller 110 can be controlled more precisely in real time based on the control signal.

As shown in FIG. 1, the wire can be supplied from the unwinding roller 110 to the tension roller 140 via a large number of rollers including the auxiliary roller 130. FIG. 1 shows that the wire is supplied from the unwinding roller 110 to the tension roller 140 via a large number of rollers, but the present invention is not limited to this. The wire can also be supplied to the tension roller 140 via only one auxiliary roller 130.

The tension roller 140 is coupled to the air cylinder 150 and can move along a uniaxial path. For example, the tension roller 140 is slidable along a uniaxial path. The air cylinder 150 can apply pressure to the tension roller 140. The pressure of the air cylinder 150 can be kept constant while the wire passes through the tension roller 140. The direction of pressure applied by the air cylinder 150 to the tension roller 140 can be substantially opposite to the tension direction of the wound wire. For example, when a wire is wound as shown in FIG. 1, the direction opposite to the tension direction (positive direction of the X axis shown in FIG. 1) applied to the wound wire (X shown in FIG. 1). In the negative direction of the shaft), the air cylinder 150 can apply pressure to the tension roller 140. Here, the pressure of the air cylinder 150 can be adjusted by the pressure value (or wire tension value) input to the constant pressure regulator 160 by the user.

Due to the pressure applied to the tension roller 140 by the air cylinder 150, the tension roller 140 can support the tension applied to the wire passing through the tension roller 140. If the direction of pressure applied to the tension roller 140 by the air cylinder 150 is substantially opposite to the direction of tension applied to the wire, the tension roller 140 can more accurately support the tension applied to the wire, thereby wire tension. Precise control is possible.

According to one embodiment of the present disclosure, the traveling direction of the wire whose traveling direction is changed via the tension roller 140 is substantially parallel to the direction of the uniaxial path in which the tension roller 140 is slidable. In such a configuration, the direction of the pressure applied to the tension roller 140 by the air cylinder 150 is opposite to the direction of the tension applied to the wire, so that more precise control of the wire tension is possible.

The position of the tension roller 140 on the uniaxial path can be determined by the pressure applied to the tension roller 140 by the air cylinder 150 and the tension applied to the wire passing through the tension roller 140.

In the case of the conventional wire tension control device, the tension roller does not slide along one axis as in the present disclosure, but moves by a method of rotating and swinging around a rotation axis. In the conventional method in which the tension roller swings around the axis of rotation, the wire tension passing through the tension roller changes abruptly depending on the angle at which the tension roller rotates, so that precise control of the wire tension is impossible. On the other hand, when the tension roller 140 slides along a uniaxial path, precise control of wire tension is possible.

The linear potentiometer 170 can measure the position of the tension roller 140 on a uniaxial path and convert the position into a voltage value. The linear potentiometer 170 can provide the converted voltage value to the control unit (not shown).

For example, the linear potentiometer 170 can convert the position of the tension roller 140 on the path 142 into one voltage value of 0V to 5V. More specifically, the linear potentiometer 170 can convert the position to a voltage value of 5V when the tension roller 140 is located at the right end of the movement path 142 (in the positive direction of the X-axis shown in FIG. 1), and the tension. If the roller 140 is located at the left end of the travel path 142 (in the negative direction of the X-axis shown in FIG. 1), that position can be converted to a voltage value of 0V. The linear potentiometer 170 can be provided to a control unit (not shown) based on the converted voltage value.

Alternatively, the linear potentiometer 170 can reconvert the converted voltage value into a displacement value and provide it to the control unit. For example, the linear potentiometer 170 can reconvert the voltage value into one displacement value of 0 to 4000 and provide it to the control unit. That is, 0V of the voltage value can be converted to 0, 5V of the voltage value can be converted to 4000, and 2.5V of the voltage value can be converted to 2500. When the linear potentiometer 170 is used as in the present disclosure, it is not necessary to newly set the position of the tension roller 140 that slides along the uniaxial path every time. For example, when reactivating the wire tension control device 100, the user does not need to reset the position of the tension roller 140 on the path 142. If the voltage value corresponding to the position of the tension roller 140 is 2.2V before the device is restarted, then after the device is restarted, the linear potentiometer 170 will have a voltage value of 2 corresponding to the current position of the tension roller 140. .2V can be provided to the control unit as it is without any additional settings by the user.

The control unit (not shown) can control the rotation speed of the motor 120 based on the voltage value converted by the linear potentiometer 170. The position of the tension roller 140 can be adjusted by the control unit (not shown) controlling the rotation speed of the motor 120 based on the position of the tension roller 140. According to one embodiment of the present disclosure, the control unit (not shown) rotates the motor 120 coupled to the unwinding roller 110 when the voltage value converted by the linear potentiometer 170 deviates from a predetermined threshold voltage value. It can be controlled to change the speed. For example, when the voltage value converted by the linear potentiometer 170 exceeds the threshold voltage value, the rotation speed of the motor 120 can be controlled to be increased. The process in which the control unit controls the rotation speed of the motor 120 based on the voltage value will be described in detail later with reference to FIGS. 3 to 6.

Instead of the voltage value converted by the linear potentiometer 170, the control unit (not shown) can control the rotation speed of the motor 120 based on the displacement value converted by the linear potentiometer 170. In the following, it is described that the control unit (not shown) controls the rotation speed of the motor 120 based on the voltage value converted by the linear potentiometer 170, but the control unit controls the displacement converted by the linear potentiometer 170. It should be noted that the rotational speed of the motor 120 can be controlled based on the value.

As shown in FIG. 1, the auxiliary roller 130 can be arranged between the unwinding roller 110 and the tension roller 140 on the traveling path of the wire. More specifically, the position of the auxiliary roller 130 is determined in consideration of the movable path 142 of the tension roller 140. The auxiliary roller 130 can be arranged deviating from the path 142 on one axis of the tension roller 140. According to one embodiment of the present disclosure, the tension roller 140 can be arranged on the right side of the movement path 142 (corresponding to the positive direction of the X axis shown in FIG. 1). In this configuration, even if the tension roller 140 is located on the rightmost side on the path 142, the auxiliary roller 130 is located on the right side of the tension roller 140, so that the air cylinder 150 is located regardless of the position of the tension roller 140. The direction of pressure applied to the tension roller 140 is always substantially opposite to the direction of tension applied to the wire. As a result, the tension roller 140 can more accurately support the tension applied to the wire, so that the wire tension can be precisely controlled.

The wire that has passed through the tension roller 140 can be supplied to the winding device (not shown) via the sensing roller 180. The sensing roller 180 can be connected to a pressure sensor 182 that measures the pressure applied to the sensing roller 180 by a wire. According to one embodiment of the present disclosure, two rollers can be arranged on both sides of the tension roller 140. As an example, the first roller 184 and the second roller 186 can be arranged on the left side surface and the right side surface of the sensing roller 180, respectively.

As shown in FIG. 1, the first roller 184 and the second roller 186 are arranged to face the sensing roller 180, press the wire toward the sensing roller 180 with a predetermined pressure, and the wire is the first roller 184. It sequentially passes through the sensing roller 180 and the second roller 186. The pressure exerted by the first roller 184 and the second roller 186 on the wire creates a pressure on which the wire pushes the sensing roller 180. The pressure at which the wire pushes the sensing roller 180 can be measured by the pressure sensor 182 provided on the sensing roller 180. According to one embodiment, the pressure sensor 182 can measure the pressure applied by the wire to the sensing roller 180 in the direction perpendicular to the traveling direction of the wire. The pressure value measured by the pressure sensor 182 can be provided to a control unit (not shown). The pressure value can be converted into a tension value applied to the wire by the control unit. The control unit (not shown) can transfer the converted tension value to a user terminal, an external terminal, or the like and provide it to the user. Therefore, the user can monitor the tension applied to the wire in real time.

According to one embodiment of the present disclosure, the control unit can control the pressure of the air cylinder 150 based on the pressure value measured by the pressure sensor 182. For example, if there is a difference between the wire tension value input by the user to the constant pressure regulator 160 and the tension value obtained by converting the pressure value measured from the sensing roller 180, the control unit controls the tension in order to reduce the difference. The pressure of the air cylinder 150 coupled to the roller 140 can be controlled.

FIG. 3 is an exemplary diagram showing an example in which the tension roller 140 of the wire tension control device 100 according to the embodiment of the present disclosure moves on a uniaxial path.

The tension roller 140 is slidable along the path 142. The path 142 corresponds to a straight line along one axis, and the direction of the path 142 is substantially parallel to the traveling direction of the wire via the tension roller 140. The position of the tension roller 140 on the path 142 can be determined by the pressure applied by the air cylinder 150 to the tension roller 140 and the tension applied to the wire passing through the tension roller 140.

The position of the tension roller 140 on the path 142 can be converted into a voltage value by a linear potentiometer. For example, the linear potentiometer can convert the position of the tension roller 140 on the path 142 into one voltage value of 0V to 5V. When the tension roller 140 is located at the left end of the movement path 142 (in the negative direction of the X axis shown in FIG. 3), the linear potentiometer converts the corresponding position value into a voltage value of 0V, and the tension roller 140 moves the movement path. When located at the right end of 142 (in the positive direction of the X-axis shown in FIG. 3), the corresponding position value can be converted to a voltage value of 5V. When the tension roller 140 is located in the center of the movement path 142, the corresponding position value can be converted into a voltage value of 2.5V. The linear potentiometer can provide the control unit with a voltage value corresponding to the position of the tension roller 140.

The first operation 310 indicates the initial position of the tension roller 140. As shown in the first operation 310, the initial position of the tension roller 140 may be, for example, position B. The linear potentiometer can convert the position B of the tension roller 140 into the corresponding voltage value of 3.6 V and provide it to the control unit. The position A corresponds to the center of the path 142 and the corresponding voltage value can be 2.5V.

The second operation 320 determines the position of the tension roller 140 moved from the initial position when the force F1 applied to the tension roller 140 by the air cylinder is larger than the tension F2 applied to the wire by the winding device (not shown). show. For example, the user can upward adjust the pressure applied to the tension roller 140 by the air cylinder via a constant pressure regulator, or momentarily reduce the force of tension applied to the wire by various factors. As described above, when the force F1 applied to the tension roller 140 by the air cylinder is larger than the tension F2 applied to the wire by the winding device (not shown), as shown in the second operation 320, the tension roller 140 The position can be moved from the initial position B to the new position C. While the tension roller 140 moves, the air cylinder can apply a constant pressure to the tension roller 140.

As shown in FIG. 3, the direction of the force F1 of the air cylinder is the direction of pushing the tension roller 140 to the left side (corresponding to the negative direction of the X axis shown in FIG. 3), and the direction of the tension F2 applied to the wire. Can be the opposite of F1 (corresponding to the positive direction of the X-axis shown in FIG. 3). The tension roller 140 can be stopped, for example, at position C when the force F1 applied to the tension roller 140 by the air cylinder and the tension F2 applied to the wire by the winding device (not shown) match.

The linear potentiometer can convert the changed position C of the tension roller 140 into a voltage value (2.2V) and provide it to the control unit. The control unit can compare the converted voltage value (2.2V) with a predetermined threshold voltage value, and can control the rotation speed of the unwinding roller based on the result of the comparison. Here, the threshold voltage value can correspond to the voltage value (2.5V) when the position of the tension roller 140 is located at the center on the path 142.

FIG. 4 is an exemplary diagram showing an example in which the tension roller 140 of the wire tension control device 100 according to another embodiment of the present disclosure moves on a uniaxial path.

The first operation 410 indicates the initial position of the tension roller 140. As shown in the first operation 410, the initial position of the tension roller 140 may be, for example, the position D. The linear potentiometer can convert the position D of the tension roller 140 into a corresponding voltage value of 4V and provide it to the control unit. The position A corresponds to the center of the path 142 and the corresponding voltage value can be 2.5V.

The second operation 420 sets the position of the tension roller 140 moved from the initial position when the force F1 applied to the tension roller 140 by the air cylinder is smaller than the tension F2 applied to the wire by the winding device (not shown). show. For example, the user can downwardly adjust the pressure exerted by the air cylinder on the tension roller 140 via a constant pressure regulator, or momentarily increase the force of tension applied to the wire by various factors. As described above, when the force F1 applied to the tension roller 140 by the air cylinder is smaller than the tension F2 applied to the wire by the winding device (not shown), as shown in the second operation 420, the tension roller 140 The position can be moved from the initial position D to the new position E.

As shown in FIG. 4, the direction of the force F1 of the air cylinder is the direction of pushing the tension roller 140 to the left side (corresponding to the negative direction of the X axis shown in FIG. 4), and the direction of the tension F2 applied to the wire. Can be the opposite of F1 (corresponding to the positive direction of the X-axis shown in FIG. 4). The tension roller 140 can be stopped, for example, at position E when the force F1 applied to the tension roller 140 by the air cylinder and the tension F2 applied to the wire by the winding device (not shown) match.

The linear potentiometer can convert the changed position E of the tension roller 140 into a voltage value (4.5V) and provide it to the control unit. The control unit can compare the converted voltage value (4.5V) with a predetermined threshold voltage value, and can control the rotation speed of the unwinding roller based on the result of the comparison. Here, the threshold voltage value can correspond to the voltage value (2.5V) when the position of the tension roller 140 is located at the center on the path 142.

As described with reference to FIGS. 3 and 4, the tension roller 140 can be moved to the right or left on the path 142 by a variety of factors. At this time, since the range in which the tension roller 140 can move on the path 142 is limited, it is necessary to adjust the position of the tension roller 140. In order to adjust the position of the tension roller 140, the control unit can adjust the rotation speed of the unwinding roller 110 that supplies the wire to the tension roller 140.

As shown in FIG. 4, when the tension roller 140 moves from the position D to the position E, the voltage value (4.5V) obtained by converting the position E by the linear potentiometer exceeds the threshold voltage value of 2.5V. Can have. Therefore, the control unit can control the rotation speed of the motor 120 that rotates the unwinding roller 110 to increase the position of the tension roller 140 in the left side direction (negative direction of the X axis). The control unit can control the rotation speed of the motor 120 until the voltage value obtained by converting the position of the tension roller 140 corresponds to the threshold voltage value (2.5V) or less. At this time, the strength of the force applied to the tension roller 140 by the air cylinder 150 is maintained constant, and only the rotation speed of the motor 120 can be changed.

According to one embodiment of the present disclosure, when the voltage value obtained by converting the position of the tension roller exceeds the threshold voltage value, the control unit can calculate the difference between the converted voltage value and the threshold voltage value, and the difference is calculated. Based on this, the rotation speed of the motor 120 can be controlled. That is, the rotation speed of the motor 120 can be increased in proportion to the degree to which the converted voltage value deviates from the threshold voltage value. At this time, the strength of the force applied to the tension roller 140 by the air cylinder 150 is maintained constant, and only the rotation speed of the motor 120 can be changed.

For example, the tension roller 140 can be located on the right side of the position E (in the positive direction of the X axis). The difference between the voltage value (4.5V) corresponding to the position E of the tension roller 140 and the threshold voltage value (2.5V) corresponds to 2V, but when the tension roller 140 is located on the right side of it, The difference from the threshold voltage value (2.5V) is larger than 2V. At this time, the control unit can control the rotation speed of the motor 120 to be further increased when the tension roller 140 is located on the right side of the position E as compared with the case where the tension roller 140 is located at the position E. That is, the control unit can further increase the rotational speed of the motor 120 in proportion to the degree to which the position of the tension roller 140 deviates from the center of the path 142 and deflects to the right.

On the other hand, as shown in FIG. 3, when the tension roller 140 moves from the position B to the position C, the voltage value (2.2V) obtained by converting the position C by the linear potentiometer corresponds to the threshold voltage value of 2.5V or less. Therefore, the control unit can be maintained as it is without having to increase the rotation speed of the motor 120.

The process in which the control unit controls the rotation speed of the motor 120 for rotating the unwinding roller 110 will be described in detail later with reference to FIG.

FIG. 5 is an exemplary diagram showing an example of controlling the rotation speed of a motor that rotates the unwinding roller 110 when the unwinding roller 110 of the wire tension control device 100 according to the embodiment of the present disclosure supplies wires. ..

The first operation 510 indicates the position of the tension roller 140 when the voltage value obtained by converting the position of the tension roller 140 exceeds the threshold voltage value. As shown in the first operation 510, the tension roller 140 can be located on the path 142 on the right side of the center. The linear potentiometer converts the position of the tension roller 140 into a voltage value and provides the converted voltage value to the control unit. The control unit compares the voltage value obtained by converting the position of the tension roller 140 by the linear potentiometer with the threshold voltage value. Here, the threshold voltage value can correspond to 2.5 V, which is a voltage value when the tension roller 140 is located at the center on the path 142.

The second operation 520 indicates that the rotation speed of the motor is increased to increase the rotation speed of the unwinding roller in order to supply a larger amount of the wire 190 to the tension roller 140. When the converted voltage value exceeds the threshold voltage value (that is, when the tension roller 140 is located on the path 142 to the right of the center), the control unit of the motor, as shown in the second operation 520. By increasing the rotation speed and rotating the unwinding roller 110 faster, a larger amount of wire 190 can be supplied per unit time.

The third operation 530 indicates the tension roller 140 which has been moved to the position corresponding to the voltage value below the threshold voltage value by a large amount of wires supplied to the tension roller 140. If the tension roller 140 is momentarily provided with a larger amount of wire 190, the force of tension applied to the wire can be momentarily reduced. Therefore, as shown in the third operation 530, the tension roller 140 can move along the movement path in the negative direction of the x-axis by the constant pressure provided by the air cylinder, and the voltage value becomes equal to or less than the threshold voltage value. You can move to the corresponding position. Therefore, the wire tension control device can smoothly supply the wire to the winding device with an appropriate tension, and at the same time, can adjust the position of the tension roller 140.

FIG. 6 is a sequence diagram showing a wire tension control method 600 according to an embodiment of the present disclosure.

According to one embodiment of the present disclosure, the user can initiate a desired wire tension value by inputting the wire tension value via the constant pressure regulator 160 (step 610). The input wire tension value can be provided to the control unit. The control unit can control the pressure of the air cylinder 150 based on the wire tension value (step 620). Thereby, the air cylinder 150 applies pressure to the tension roller 140 that can move along the path. The tension roller 140 uses the pressure received from the air cylinder 150 to support the tension of the wire supplied by the unwinding roller. Therefore, by controlling the pressure of the air cylinder, it is possible to control the wire tension by the tension roller.

The linear potentiometer 170 can measure the position of the tension roller 140 coupled to the air cylinder 150 on a uniaxial path and convert the position of the tension roller 140 into a voltage value (step 630). The linear potentiometer 170 can provide the converted voltage value to the control unit.

The control unit can control the rotation speed of the motor 120 that rotates the unwinding roller 110 that supplies the wire based on the voltage value (step 640). Therefore, the position of the tension roller 140 on the path can be adjusted.

In one embodiment, the control unit can control to change the rotation speed of the motor 120 when the voltage value converted by the linear potentiometer 170 deviates from the threshold voltage value. For example, when it is determined that the voltage value converted by the linear potential meter 170 exceeds the threshold voltage value, the control unit controls to increase the rotation speed of the motor 120 and increases the rotation speed of the unwinding roller 110. Therefore, the amount of wire supplied per unit time can be increased. If a larger amount of wire is supplied per unit time, the position of the tension roller 140 on the path can be adjusted. Here, the threshold voltage value can correspond to the voltage value when the position of the tension roller is located at the center on the uniaxial path. The air cylinder 150 can apply a constant pressure to the tension roller 140 while the position of the tension roller 140 is adjusted on the path.

After that, the pressure applied to the sensing roller 180 by the wire passing through the tension roller 140 can be measured by the pressure sensor 182. The control unit can control the pressure of the air cylinder 150 based on the pressure value measured by the pressure sensor 182. For example, if the wire tension value obtained by converting the pressure value measured by the pressure sensor 182 is lower than the wire tension value input to the constant pressure regulator 160 by the user, the control unit can control to increase the pressure of the air cylinder 150.

FIG. 7 is a diagram showing a main part of the wire tension control device 700 according to another embodiment of the present disclosure. The wire tension control device 700 can be configured to include only one auxiliary roller 130, which is not a large number of rollers, in the wire traveling path between the unwinding roller 110 and the tension roller 140. As shown in FIG. 7, one auxiliary roller 130 is arranged between the unwinding roller 110 and the tension roller 140 on the traveling path of the wire to support the wire.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and any person skilled in the art who has ordinary knowledge of the present invention can make various modifications within the ideas and scope of the present invention. Modifications and additions are possible and it should be understood that such modifications, modifications and additions fall within the scope of the claims.

A person having ordinary knowledge in the technical field to which the present invention belongs can make various substitutions, modifications and changes within the range not deviating from the technical idea of the present invention. And not limited by the attached drawings.

Claims (15)

It is a control device for controlling the tension of the wire.
Unwinding rollers that supply wires by rotation,
The motor that rotates the unwinding roller and
A tension roller that supports the tension of the wire supplied by the unwinding roller and can move along a uniaxial path.
An air cylinder that applies pressure to the tension roller to support the tension of the wire,
A linear potentiometer that measures the position of the tension roller on the uniaxial path and converts the position into a voltage value.
Includes a control unit for controlling the motor and the air cylinder.
The control unit controls the pressure of the air cylinder to adjust the tension of the wire.
The control unit is a wire tension control device that controls the rotation speed of the motor based on the voltage value converted by the linear potentiometer. The wire tension control device according to claim 1, wherein the control unit changes the rotation speed of the motor when the voltage value converted by the linear potentiometer deviates from the threshold voltage value. The wire tension control device according to claim 1, wherein the control unit increases the rotation speed of the motor when the voltage value converted by the linear potentiometer exceeds the threshold voltage value. The wire tension control device according to claim 2 or 3, wherein the threshold voltage value corresponds to a voltage value when the position of the tension roller is located at the center on the uniaxial path. The wire tension control device according to claim 1, wherein the direction of the uniaxial path is parallel to the traveling direction of the wire via the tension roller. Further including an auxiliary roller for assisting the tension roller,
The wire supplied by the unwinding roller is supplied to the tension roller via the auxiliary roller.
The wire tension control device according to claim 1, wherein the auxiliary roller is arranged deviating from the uniaxial path of the tension roller. It further comprises a sensing roller equipped with a pressure sensor for measuring the tension of the wire passing through the tension roller.
The sensing roller provides the pressure value measured by the pressure sensor to the control unit.
The wire tension control device according to claim 1, wherein the control unit controls the pressure of the air cylinder based on the pressure value. The wire tension control device according to claim 7, wherein the pressure sensor provided on the sensing roller measures the pressure applied by the wire to the sensing roller in the direction perpendicular to the traveling direction of the wire. The wire tension control device according to claim 1, wherein the motor corresponds to a servo motor. It is a control method for controlling the tension of the wire.
The step where the wire tension value is input via the constant pressure regulator,
A step in which the control unit controls the pressure of the air cylinder based on the wire tension value, and
A step of measuring the position of the tension roller to which the air cylinder applies pressure on a uniaxial path by a linear potentiometer and converting the position of the tension roller into a voltage value.
The control unit includes a step of controlling the rotation speed of the motor for rotating the unwinding roller that supplies the wire based on the voltage value.
A wire tension control method in which the tension roller is movable on the uniaxial path and supports the tension of the wire supplied by the unwinding roller. In the step where the control unit controls the rotation speed of the motor that rotates the unwinding roller that supplies the wire based on the voltage value.
The wire tension control method according to claim 10, wherein the control unit controls to change the rotation speed of the motor when the voltage value deviates from the threshold voltage value. In the step where the control unit controls the rotation speed of the motor that rotates the unwinding roller that supplies the wire based on the voltage value.
The wire tension control method according to claim 10, wherein the control unit controls to increase the rotation speed of the motor when the voltage value exceeds the threshold voltage value. The wire tension control method according to claim 11 or 12, wherein the threshold voltage value corresponds to a voltage value when the position of the tension roller is located at the center on the uniaxial path. The wire tension control method according to claim 10, further comprising a step of measuring the tension of a wire passing through the tension roller by a pressure sensor. The wire tension control method according to claim 14, further comprising a step of controlling the pressure of the air cylinder based on the measured tension of the wire.

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