KR20240065963A - Apparatus for controlling tenson of coil supplied to winding device - Google Patents

Abstract

A control device for controlling the tension of a wire according to an embodiment of the present disclosure includes a metal wire supply unit configured to supply a metal wire, an unwinding roller that supplies the wire by rotation; a motor that rotates the unwinding roller; a tension roller supporting the tension of the wire supplied by the unwinding roller and movable 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 one axis path and converts the position into a voltage value; and a control unit for controlling the motor and 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.

Description

A device for controlling the tension of the coil supplied to the winding device {APPARATUS FOR CONTROLLING TENSON OF COIL SUPPLIED TO WINDING DEVICE}

The present disclosure relates to a coil tension control device, and more specifically, to a control device for controlling the tension of a coil supplied to a winding device.

Recently, the spread of electric vehicles is accelerating due to 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 for winding wire into coils are being studied.

In particular, there is a need to precisely control the tension applied to the wire in the process of winding the wire. Wire tension may change due to differences in wire characteristics, or even if the same wire is continuously wound, wire tension may change due to changes in the load of the winding device. If the tension of the wire being wound is not kept constant but changes, it may cause deformation in the shape of the winding and cause quality deterioration. Therefore, it is necessary to precisely control the tension of the wire being wound and keep it constant.

Embodiments disclosed herein control the tension applied to the wire through a tension roller during the process of winding the wire (or coil), thereby maintaining the wire tension constant and preventing the wire from being disconnected. Provides a device and method.

Embodiments disclosed herein provide an apparatus and method for adjusting the position of a tension roller in the process of constantly controlling the tension applied to the wire through the tension roller during the wire winding process.

A control device for controlling the tension of a wire according to an embodiment of the present disclosure includes a metal wire supply unit configured to supply a metal wire, an unwinding roller that supplies the wire by rotation, and a device that rotates the unwinding roller. A motor, a tension roller supporting the tension of the wire supplied by the unwinding roller and movable along a uniaxial path, an air cylinder applying pressure to the tension roller to support the tension of the wire, tensioning it along a uniaxial path It includes a linear potentiometer that measures the position of the roller and converts the position into a voltage value, and a control unit to control the motor and 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.

According to one embodiment of the present disclosure, the metal wire supply unit includes four rollers.

According to an embodiment of the present disclosure, the four rollers are assembled by applying a preload to each bearing to reduce the shaking of the rollers, and the control unit controls the motor when the voltage value converted by the linear potentiometer exceeds the threshold voltage value. Increases rotation speed.

According to one embodiment of the present disclosure, the metal wire supply unit includes a first roller, a second roller, a third roller, and a fourth roller, the rotation axis of the first roller and the rotation axis of the third roller are parallel to each other, and the threshold voltage The value corresponds to the voltage value when the position of the tension roller is centrally located on one axis path.

According to one embodiment of the present disclosure, the direction of one axis path is parallel to the direction of travel of the wire via the tension roller.

According to one embodiment of the present disclosure, the control unit is further configured to control the rotation of the first roller, the second roller, the third roller, and the fourth roller so that the metal wire supply unit supplies the metal wire.

According to an embodiment of the present disclosure, it further includes 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, and the control unit Controls the pressure of the air cylinder based on the pressure value.

According to an embodiment of the present disclosure, the pressure sensor provided on the sensing roller measures the pressure applied by the wire to the sensing roller in a direction perpendicular to the direction in which the wire travels.

According to one embodiment of the present disclosure, the motor corresponds to a servo motor.

According to one embodiment of the present disclosure, the rotation axis of the second roller and the rotation axis of the fourth roller are parallel to each other, and the rotation axis of the first roller and the rotation axis of the second roller are perpendicular to each other.

According to various embodiments of the present disclosure, the metal wire supply unit includes four rollers, so that roller shake can be alleviated and shake can be minimized by applying preload (pull assembly) to the bearing. As a result, damage to the bearing due to roller shaking can be prevented, and damage to the product due to excessive yaw angle of the roller can also be prevented.

According to various embodiments of the present disclosure, after the metal wire is wound on the bobbin, a forming pressing device capable of physically pressing the metal wire is additionally installed to minimize the change in position of the metal wire due to changes in physical properties. You can.

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

According to various embodiments of the present disclosure, in the process of controlling the tension applied to the wire through 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 through a linear potentiometer, It is possible to adjust the position of the tension roller.

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

Embodiments of the present disclosure will be described with reference to the accompanying drawings described below, in which like reference numerals indicate like elements, but are not limited thereto.
1 is a diagram illustrating main parts of a wire tension control device according to an embodiment of the present disclosure.
FIG. 2 is a diagram showing the rear of the wire tension control device disclosed in FIG. 1
Figure 3 is an exemplary diagram showing an example in which the tension roller of the wire tension control device moves on one axis path according to an embodiment of the present disclosure.
FIG. 4 is an exemplary diagram illustrating an example in which the tension roller of a wire tension control device moves on a single axis path according to another embodiment of the present disclosure.
Figure 5 is an exemplary diagram illustrating an example of controlling the rotational speed of a motor that rotates the unwinding roller when the unwinding roller of the wire tension control device supplies wire according to an embodiment of the present disclosure.
Figure 6 is a flowchart showing a wire tension control method according to an embodiment of the present disclosure.
FIG. 7 is a diagram illustrating main parts of a wire tension control device according to another embodiment of the present disclosure.
Figure 8 is a perspective view of a metal wire supply unit according to an embodiment of the present disclosure.
Figure 9 is a bottom view of a metal wire supply unit according to an embodiment of the present disclosure.
Figure 10 is a perspective view of a forming pressing device according to an embodiment of the present disclosure.

Hereinafter, specific details for implementing the present disclosure will be described in detail with reference to the attached drawings. However, in the following description, detailed descriptions of well-known functions or configurations will be omitted if there is a risk of unnecessarily obscuring the gist of the present disclosure.

In the accompanying drawings, identical or corresponding components are given the same reference numerals. Additionally, in the description of the following embodiments, overlapping descriptions of identical or corresponding components may be omitted. However, even if descriptions of components are omitted, it is not intended that such components are not included in any embodiment. Terms expressing relative positions may be used to describe relationships between components shown in the drawings, and the present disclosure is not limited by such terms.

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

The directions of the

The wire tension control device 100 includes an unwinding roller (110), a motor (120), a tension roller (140), an air cylinder (150, shown in Figure 2), and a linear potentiometer (170, shown in Figure 2). shown) and a control unit (not shown). The wire tension control device 100 may further include an auxiliary roller 130 and a sensing roller 180.

The unwinding roller 110 is a roller for supplying wire. For example, the unwinding roller 110 can supply the wire wound around a bobbin (not shown) to a winding device (not shown) through the wire tension control device 100, and the wire supplied to the winding device is coiled. It can be wound with The bobbin may be placed on the left side of the wire tension control device 100 (on the negative side of the It can be placed on the positive side of the X axis (not shown). At this time, the direction in which the wire is wound or the direction in which the wire travels may correspond to the right direction ((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 can supply wire by rotation. The unwinding roller 110 may be connected to the motor 120 through a rotation axis located at the center of the unwinding roller 110. One end of the rotating shaft may be coupled to the unwinding roller 110, and the other end may be coupled to the motor 120. The motor 120 may supply wire by rotating the unwinding roller 110 in one direction based on a control signal from a control unit (not shown). The motor 120 may correspond to a servo motor. When using a servo motor, the rotation speed of the unwinding roller 110 can be more precisely controlled in real time based on a control signal.

As shown in FIG. 1, the wire may be supplied from the unwinding roller 110 to the tension roller 140 via a plurality of rollers including the auxiliary roller 130. In Figure 1, the wire is supplied from the unwinding roller 110 to the tension roller 140 via a plurality of rollers, but the present invention is not limited thereto. The wire may 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 single axis path. For example, the tension roller 140 can slide along a single axis path. The air cylinder 150 may apply pressure to the tension roller 140. The pressure of the air cylinder 150 may be maintained 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 may be substantially opposite to the direction of tension of the wire being wound. For example, when a wire is wound in the direction shown in FIG. 1, the direction of tension applied to the wire being wound (positive direction of the X axis shown in FIG. 1) and the opposite direction (negative direction of the X axis shown in FIG. 1) As a result, 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 by the user to the static pressure regulator 160.

By the pressure applied by the air cylinder 150 to the tension roller 140, the tension roller 140 can support the tension applied to the wire passing through the tension roller 140. When the direction of pressure applied by the air cylinder 150 to the tension roller 140 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. , which allows detailed control of wire tension.

According to an embodiment of the present disclosure, the traveling direction of the wire whose traveling direction has been changed via the tension roller 140 may be substantially parallel to the direction of an axial path along which the tension roller 140 can slide. In this configuration, the direction of pressure applied by the air cylinder 150 to the tension roller 140 is opposite to the direction of tension applied to the wire, allowing more detailed control of wire tension.

The position of the tension roller 140 on one axis path may 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.

In the case of a conventional wire tension control device, the tension roller does not slide along one axis as in the present disclosure, but moves by rotating and oscillating around a rotation axis. In the conventional method in which the tension roller oscillates around a rotation axis, precise control of the wire tension is impossible because the wire tension passing through the tension roller changes rapidly depending on the angle at which the tension roller is rotated. On the other hand, when the tension roller 140 slides along a single axis path, precise control of wire tension is possible.

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

For example, the linear potentiometer 170 may convert the position on the path 142 of the tension roller 140 into a voltage value of 0 V to 5 V. More specifically, the linear potentiometer 170 converts the position into a voltage value of 5 V when the tension roller 140 is located at the right end (positive direction of the X axis shown in Figure 1) of the movement path 142. This can be done, and when the tension roller 140 is located at the end of the left side (negative direction of the X axis shown in FIG. 1) of the movement path 142, the position can be converted to a voltage value of 0 V. The linear potentiometer 170 can provide the converted voltage value to a control unit (not shown).

Alternatively, the linear potentiometer 170 may convert the converted voltage value back into a displacement value and provide the converted voltage value to the control unit. For example, the linear potentiometer 170 can convert a voltage value into a displacement value from 0 to 4000 and provide it to the control unit. That is, a voltage value of 0 V can be converted to 0, a voltage value of 5 V can be converted to 4000, and a voltage value of 2.5 V can be converted to 2500. When using the linear potentiometer 170 as in the present disclosure, there is no need to newly set the position of the tension roller 140 that slides along one axis path every time. For example, even when reactivating the wire tension control device 100, the user does not need to re-set the position of the tension roller 140 on the path 142. If the voltage value corresponding to the position of the tension roller 140 before the device is restarted is 2.2 V, after the device is restarted, the linear potentiometer 170 has a voltage value of 2.2 V corresponding to the current position of the tension roller 140. It can be provided as is in the control unit without any separate settings by the user.

The control unit (not shown) may control the rotation speed of the motor 120 based on the voltage value converted by the linear potentiometer 170. A control unit (not shown) may control the rotation speed of the motor 120 based on the position of the tension roller 140, thereby adjusting the position of the tension roller 140. According to an embodiment of the present disclosure, when the voltage value converted by the linear potentiometer 170 deviates from a predetermined threshold voltage value, the control unit (not shown) controls the motor 120 coupled with the unwinding roller 110. It can be controlled to change the rotation 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 increase. The process by which the control unit controls the rotation speed of the motor 120 based on the voltage value will be described in detail with reference to FIGS. 3 to 6 below.

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. Below, it is explained 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 rotation speed of the motor 120 based on the displacement value converted by the linear potentiometer 170. Note that the rotation speed of the motor 120 can also be controlled.

As shown in FIG. 1, the auxiliary roller 130 may be disposed between the unwinding roller 110 and the tension roller 140 on the wire's travel path. 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 may be disposed off the path 142 on one axis of the tension roller 140. According to one embodiment of the present disclosure, the tension roller 140 may be disposed to the right 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 of the path 142, the auxiliary roller 130 is located on the right side of the tension roller 140, regardless of the position of the tension roller 140. The direction of pressure applied by the air cylinder 150 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, and thus detailed control of the wire tension is possible.

The wire that has passed through the tension roller 140 may be supplied to a winding device (not shown) via the sensing roller 180. The sensing roller 180 may 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 may be disposed on both sides of the tension roller 140. As an example, a first roller 184 and a second roller 186 may be disposed on the left and right sides 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 to press the wire with a predetermined pressure toward the sensing roller 180, and the wire is It may sequentially pass through the first roller 184, the sensing roller 180, and the second roller 186. The pressure that the first roller 184 and the second roller 186 apply to the wire generates pressure that causes the wire to press against the sensing roller 180. The pressure with which the wire presses 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 may measure the pressure applied by the wire to the sensing roller 180 in a direction perpendicular to the direction in which the wire travels. The pressure value measured by the pressure sensor 182 may be provided to a controller (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) may provide the converted tension value to the user by transmitting it to a user terminal, an external terminal, etc. Therefore, the user can monitor the tension applied to the wire in real time.

According to an embodiment of the present disclosure, the controller may 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 into the static pressure regulator 160 and the tension value converted from the pressure value measured by the sensing roller 180, the control unit uses the tension roller 140 to reduce the difference. The pressure of the air cylinder 150 combined with can be controlled.

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

The tension roller 140 may slide along the path 142. The path 142 may correspond to a straight line along one axis, and the direction of the path 142 may be substantially parallel to the direction in which the wire passes through the tension roller 140. The position of the tension roller 140 on the path 142 may 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 to a voltage value by a linear potentiometer. For example, the linear potentiometer can convert the position on the path 142 of the tension roller 140 into a voltage value of 0 V to 5 V. The linear potentiometer converts the corresponding position value into a voltage value of 0 V when the tension roller 140 is located at the left end of the movement path 142 (negative direction of the When 140) is at the right end (positive direction of the X axis shown in FIG. 3) of the movement path 142, the corresponding position value can be converted to a voltage value of 5 V. When the tension roller 140 is located in the center of the movement path 142, the corresponding position value can be converted to a voltage value of 2.5 V. The linear potentiometer may provide a voltage value corresponding to the position of the tension roller 140 to the control unit.

As shown in FIG. 3(a), 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 a corresponding voltage value of 3.6 V and provide it to the control unit. Location A corresponds to the center of path 142, and the corresponding voltage value may be 2.5 V.

For example, the user may upwardly adjust the pressure applied by the air cylinder to the tension roller 140 through a static pressure regulator, or the tension force applied to the wire may momentarily decrease due to various factors. In this way, when the force F1 applied by the air cylinder to the tension roller 140 is greater than the tension F2 applied to the wire by the winding device (not shown), the tension as shown in FIG. 3(b) The position of the roller 140 may move from the initial position B to the new position C. While the tension roller 140 moves, the air cylinder may apply a certain pressure to the tension roller 140.

As shown in FIG. 3, the direction of the force F1 of the air cylinder may be a direction pushing the tension roller 140 to the left (corresponding to the negative direction of the X axis shown in FIG. 3), and may be applied to the wire. The direction of tension F2 may be opposite to F1 (corresponding to the positive direction of the X axis shown in FIG. 3). The tension roller 140 can stop, for example, at position C when the force F1 applied by the air cylinder to the tension roller 140 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 (2.2 V) and provide it to the control unit. The control unit can compare the converted voltage value (2.2 V) with a preset threshold voltage value and control the rotation speed of the unwinding roller based on the comparison result. Here, the threshold voltage value may correspond to a voltage value (2.5 V) when the tension roller 140 is located at the center of the path 142.

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

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

For example, the user may lower the pressure applied by the air cylinder to the tension roller 140 through a static pressure regulator, or the tension force applied to the wire may momentarily increase due to various factors. In this way, when the force F1 applied by the air cylinder to the tension roller 140 is smaller than the tension F2 applied to the wire by the winding device (not shown), the tension as shown in FIG. 4(b) The position of the roller 140 may move from the initial position D to a new position E.

As shown in FIG. 4, the direction of the force F1 of the air cylinder may be a direction that pushes the tension roller 140 to the left (corresponding to the negative direction of the The direction of tension F2 may be opposite to 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 by the air cylinder to the tension roller 140 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 (4.5 V) and provide it to the control unit. The control unit can compare the converted voltage value (4.5 V) with a preset threshold voltage value and control the rotation speed of the unwinding roller based on the comparison result. Here, the threshold voltage value may correspond to a voltage value (2.5 V) when the tension roller 140 is located at the center of the path 142.

As described with reference to FIGS. 3 and 4 , the tension roller 140 may move to the right or left on the path 142 depending on various factors. At this time, since there is a limit to the range in which the tension roller 140 can move on the path 142, it is necessary to adjust the position of the tension roller 140. In order to adjust the position of the tension roller 140, the controller may 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 position D to position E, the voltage value (4.5 V) converted to position E by the linear potentiometer exceeds the threshold voltage value of 2.5 V. You can have it. Accordingly, the control unit can control the rotation speed of the motor 120 that rotates the unwinding roller 110 to increase, thereby moving the position of the tension roller 140 to the left (negative direction of the X axis). The control unit may control the rotation speed of the motor 120 until the voltage value obtained by changing the position of the tension roller 140 corresponds to a threshold voltage value (2.5 V) or less. At this time, the strength of the force applied by the air cylinder 150 to the tension roller 140 is maintained constant, and only the rotation speed of the motor 120 can be changed.

According to an embodiment of the present disclosure, when the voltage value converted to the position of the tension roller exceeds the threshold voltage value, the control unit may calculate the difference between the converted voltage value and the threshold voltage value, and based on the difference, 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 by the air cylinder 150 to the tension roller 140 is maintained constant, and only the rotation speed of the motor 120 can be changed.

For example, the tension roller 140 may be located further to the right (positive direction of the X axis) than position E. The difference between the voltage value (4.5 V) corresponding to the position E of the tension roller 140 and the threshold voltage value (2.5 V) corresponds to 2 V, but when the tension roller 140 is located to the right, the threshold voltage The difference from the value (2.5 V) is greater than 2 V. In this case, the control unit may control the rotation speed of the motor 120 to be further increased when the tension roller 140 is on the right side of position E compared to when the tension roller 140 is at 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 is biased to the right.

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

The process by which the control unit controls the rotational speed of the motor 120 that rotates the unwinding roller 110 will be described in detail below with reference to FIG. 5.

Figure 5 shows an example of controlling the rotation speed of the motor that rotates the unwinding roller 110 when the unwinding roller 110 of the wire tension control device 100 supplies wire according to an embodiment of the present disclosure. This is an example diagram.

As shown in FIG. 5(a), the tension roller 140 may be located to the right of the center on the path 142. 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 at which the linear potentiometer converts the position of the tension roller 140 with the threshold voltage value. Here, the threshold voltage value may correspond to 2.5 V, which is the voltage value when the tension roller 140 is located in the center on the path 142.

When the converted voltage value exceeds the threshold voltage value (i.e., when the tension roller 140 is located to the right of the center on the path 142), as shown in FIG. 5(b), the control unit controls the motor. By increasing the rotation speed to rotate the unwinding roller 110 faster, a greater amount of wire 190 can be supplied per unit time. When a larger amount of wire 190 is momentarily provided to the tension roller 140, the tension roller 140 can be moved along a movement path in the negative x-axis direction by a constant pressure provided by the air cylinder. , it can be moved to a position corresponding to a voltage value below the threshold voltage value. Accordingly, the wire tension control device can adjust the position of the tension roller 140 while smoothly supplying the wire to the winding device at an appropriate tension.

Figure 6 is a flowchart 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 may begin by inputting a desired wire tension value through the static pressure regulator 160 (step 610). The input wire tension value may be provided to the control unit. The control unit may control the pressure of the air cylinder 150 based on the wire tension value (step 620). Accordingly, 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, wire tension control by the tension roller is possible.

The linear potentiometer 170 can measure the position of the tension roller 140 coupled to the air cylinder 150 on a path of one axis 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 may 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). Accordingly, the position on the path of the tension roller 140 can be adjusted.

In one embodiment, the control unit may control the rotation speed of the motor 120 to change 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 potentiometer 170 exceeds the threshold voltage value, the control unit controls to increase the rotation speed of the motor 120 to increase the rotation speed of the unwinding roller 110. By increasing , the supply amount of wire per unit time can be increased. If a larger amount of wire is supplied per unit time, the position on the path of the tension roller 140 can be adjusted. Here, the threshold voltage value may correspond to the voltage value when the tension roller is located at the center of the one-axis path. While the position of the tension roller 140 is adjusted on the path, the air cylinder 150 may apply a constant pressure to the tension roller 140.

Thereafter, the pressure applied by the wire passing through the tension roller 140 to the sensing roller 180 can be measured through the pressure sensor 182. The controller may 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 converted from the pressure value measured by the pressure sensor 182 is lower than the wire tension value input by the user to the static pressure regulator 160, the control unit controls to increase the pressure of the air cylinder 150. can do.

FIG. 7 is a diagram illustrating main parts of a wire tension control device 700 according to another embodiment of the present disclosure. The wire tension control device 700 may be configured to include only one auxiliary roller 130 rather than multiple rollers in the path of the wire between the unwinding roller 110 and the tension roller 140. As shown in FIG. 7, one auxiliary roller 130 is disposed between the unwinding roller 110 and the tension roller 140 on the wire's path to support the wire.

Figure 8 is a perspective view of a metal wire supply unit according to an embodiment of the present disclosure. Figure 9 is a bottom view of a metal wire supply unit according to an embodiment of the present disclosure. As shown, the metal wire supply unit may include four rollers. Through this configuration, roller shake can be alleviated, and shake can be minimized by applying preload (pull assembly) to the bearing. As a result, damage to the bearing due to roller shaking can be prevented, and damage to the product due to excessive yaw angle of the roller can also be prevented.

In one embodiment, the metal wire supply unit may include four rollers. Here, the four rollers are assembled by applying a preload to each bearing to reduce the shaking of the rollers.

In one embodiment, the metal wire supply unit may include a first roller, a second roller, a third roller, and a fourth roller. At this time, the rotation axis of the first roller and the rotation axis of the third roller may be parallel to each other, and the rotation axis of the second roller and the rotation axis of the fourth roller may be parallel to each other. Additionally, the rotation axis of the first roller and the rotation axis of the second roller may be perpendicular to each other.

Figure 10 is a perspective view of a forming pressing device according to an embodiment of the present disclosure. After the above-described bobbin winding process is completed, a problem in which forming reproducibility is not satisfactory may occur. This problem is because the position changes due to changes in the physical properties of the metal wire (coil). In other words, a phenomenon in which the hardened metal wire rises due to temperature changes, etc. may occur. To solve this problem, after the metal wire is wound on the bobbin, a forming pressing device is additionally installed to physically press the metal wire, thereby minimizing the change in position of the metal wire due to changes in physical properties. .

The preferred embodiments of the present invention described above have been disclosed for illustrative purposes, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions will be possible. should be regarded as falling within the scope of the above patent claims.

Those of ordinary skill in the technical field to which the present invention pertains can make various substitutions, modifications and changes without departing from the technical spirit of the present invention. Therefore, the present invention is limited to the above-described embodiments and the accompanying drawings. It is not limited by

110: Unwinding roller
120: motor
130: Auxiliary roller
140: Tension roller
150: air cylinder
160: static pressure regulator
170: Linear potentiometer
180: Sensing roller
182: pressure sensor
184: first roller
186: second roller

Claims (10)

A control device for controlling the tension of a wire, comprising:
a metal wire supply unit configured to supply metal wire;
an unwinding roller that feeds the wire by rotation;
a motor that rotates the unwinding roller;
a tension roller supporting the tension of the wire supplied by the unwinding roller and movable 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 single axis path and converts the position into a voltage value; and
Control unit for controlling the motor and the air cylinder
Including,
The control unit controls the pressure of the air cylinder to adjust the tension of the wire,
The wire tension control device wherein the control unit controls the rotation speed of the motor based on the voltage value converted by the linear potentiometer.
According to paragraph 1,
A wire tension control device wherein the metal wire supply unit includes four rollers.
According to paragraph 2,
The four rollers are assembled by applying a preload to each bearing to reduce the shaking of the rollers,
The control unit increases the rotation speed of the motor when the voltage value converted by the linear potentiometer exceeds a threshold voltage value.
According to paragraph 3,
The metal wire supply unit includes a first roller, a second roller, a third roller, and a fourth roller,
The rotation axis of the first roller and the rotation axis of the third roller are parallel to each other,
The threshold voltage value corresponds to a voltage value when the position of the tension roller is located at the center on the one-axis path.
According to paragraph 1,
A wire tension control device, wherein the direction of the one-axis path is parallel to the direction of travel of the wire via the tension roller.
According to paragraph 2,
The control unit is further configured to control rotation of the first roller, the second roller, the third roller, and the fourth roller so that the metal wire supply unit supplies the metal wire.
According to paragraph 1,
It further includes 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 wherein the control unit controls the pressure of the air cylinder based on the pressure value.
In clause 7,
The pressure sensor provided on the sensing roller measures the pressure applied by the wire to the sensing roller in a direction perpendicular to the direction in which the wire travels.
According to paragraph 1,
The motor corresponds to a servomotor, a wire tension control device.
According to paragraph 2,
The rotation axis of the second roller and the rotation axis of the fourth roller are parallel to each other,
A wire tension control device, wherein the rotation axis of the first roller and the rotation axis of the second roller are perpendicular to each other.