JPH0820462A - Unwinding tension controlling method and device on winding equipment - Google Patents

Abstract

PURPOSE:To ensure winding by controlling the unwinding tension of a wound material in a pattern similar to a controlling pattern for winding tension, thereby preventing a slip between the wound material and a feed roller, which is caused when the traveling speed of the wound material increases. CONSTITUTION:A wound material 1 unwound from a web 2 is guided by a detection roller 5, and unwinding tension of the material to be reeled 1 is detected. In addition, a feedback controller 6 is provided with a driver 7. In the controller 6, the number of revolutions of a motor 3 is detected by a pulse generator 8, and the driver 7 receives a detection signal N from the generator 8. Based on both winding tension pattern command P and a detection signal T by a detector 4, the driving torque of the motor 3 is placed under feedback control so that the unwinding tension of the material to be reeled 1 is controlled by a pattern similar to a control pattern for the winding tension. Accordingly, since the unwinding tension of the web 2 and the winding tension of the winding roll are balanced, no slip will be made between the wound material 1 and a feed roller even if the traveling speed of the wound material is accelerated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention unwinds a winding material from a raw material, winds it on a winding roll, and sets a winding tension of the winding material according to a set pattern based on a winding tension pattern command of a command section. The present invention relates to a winding device of a control type, and more particularly to a winding tension control device for the winding device.

[0002]

2. Description of the Related Art So-called slitters are used for slitting and winding up a winding material such as paper and plastic film. In the slitter, the material to be wound is unwound from the raw material, passed through a feed roller, guided by a knife, and slit into a plurality of lines. After slitting, the winding material passes through a feeding roller, is guided to a winding roll, and is wound up. In this case, the take-up tension of the take-up material is most important for its performance. In order to accurately wind the winding material, the winding tension is changed along a predetermined characteristic straight line or characteristic curve as the winding diameter increases,
Need to control. Therefore, normally, in the central control device, the control pattern of the winding tension is set in advance, the command section of the central control device issues the winding tension pattern command, and the winding tension of the winding material is based on the winding tension pattern command. Are controlled according to the setting pattern. The set pattern consists of a characteristic straight line or characteristic curve of the winding tension.

By the way, when the winding tension is controlled according to a set pattern, the unwinding tension of the winding material to be unwound from the material is controlled by an appropriate device to control the unwinding tension of the winding material. Was generally kept constant. For example, as shown in FIG. 4, the winding tension T1 of the winding material is controlled in accordance with a set pattern based on the winding tension pattern command of the command section, and the winding tension T1 has a characteristic as the winding diameter D increases. It changes along a straight line and decreases. At the same time, the unwinding tension T2 of the winding material is controlled by an appropriate device, regardless of the winding diameter D.
2 is kept constant. Further, a considerable tension T3 acts on the feed roller between the original fabric and the take-up roll and bears it. This is what is called roller bearing tension.

However, in this case, even if the winding tension T1 decreases along the characteristic straight line, the unwinding tension T2 is maintained at a constant value, and the two do not balance each other. Therefore, as the winding tension T1 decreases, the roller load tension T3 gradually changes and increases. This impairs the running stability of the winding material and is not preferable. In particular, recently, speeding up the slitter,
It is desired to increase the traveling speed of the winding material and the winding speed. However, when the traveling speed of the winding material is increased, when the roller load tension T3 changes, slippage occurs between the winding material and the feed roller. Is likely to occur. When the slip occurs, it affects the winding tension T1 of the winding material, and the winding tension T1 largely changes. Therefore, there is a problem in that the winding material cannot be accurately wound.

Not only the slitter but also other winding devices are the same.

[0006]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a winding material is unwound from a raw material, wound on a winding roll, and the winding tension of the winding material is set according to a set pattern based on a winding tension pattern command of a command section. In the control type winding device,
Even if you speed it up and increase the running speed of the winding material,
The purpose is to prevent slipping between the winding material and the feed roller, accurately control the winding tension, and accurately wind the winding material.

[0007]

According to the present invention, the unwinding tension of the winding material is controlled with a pattern similar to the winding tension control pattern based on the winding tension pattern command of the command section.

Further, according to the present invention, the motor or the brake is connected to the material web, the driving or braking torque is applied to the material web, the unwinding tension is applied to the winding material, and the detector detects the winding material. The unwinding tension is detected. Further, a feedback control device is connected to the motor or the brake, the command unit and the detector, and the drive or braking torque of the motor or the brake is feedback-controlled based on the winding tension pattern command and the detection signal of the detector to control the winding material. The unwinding tension is controlled with a pattern similar to the control pattern of the winding tension.

Further, according to the present invention, when the motor is connected to the original fabric, the original fabric is driven and rotated by the motor, the dancer roller is supported by the movable member, and the winding material is unwound from the original fabric. , The dancer roller engages the web material, the load mechanism is coupled to the movable member, the movable member and the dancer roller are loaded, and the web material is unwound. Furthermore, the position of the dancer roller is detected by the detector, the feedback control device is connected to the motor and the detector, and the rotation speed of the original is feedback-controlled based on the detection signal of the detector, and the position of the dancer roller is constant. The load control device is connected to the command unit and the load mechanism, and the load of the load mechanism is adjusted and changed by the load control device based on the winding tension pattern command of the command unit. Is controlled with a pattern similar to the winding tension setting pattern.

[0010]

Description of Embodiments Embodiments of the present invention will be described below.

FIG. 1 shows an embodiment of the present invention. This is a slitter for the winding material 1 such as paper, plastic film, etc. for slitting and winding the winding material 1. The winding material 1 is unwound from the material 2 and passes through a feed roller, Guided by a knife and slit into multiple lines. After slitting, the winding material 1 passes through a feed roller, is guided to a winding roll, and is wound up. Further, the command unit of the central controller issues a winding tension pattern command P, and based on the winding tension pattern command P, the winding tension of the winding material 1 is controlled according to the set pattern. Normally, the winding roll is driven and rotated by the motor, and the winding tension control device controls the drive torque of the motor based on the winding tension pattern command P.
This controls the winding tension of the winding material 1. Therefore, for example, similar to the device of FIG. 4, as the winding diameter D increases, the winding tension T1 changes according to the characteristic straight line,
Decrease. The structure of the winding tension control device is known, and the description thereof is omitted.

Furthermore, the device comprises a motor 3 and a detector 4, which motor 3 comprises a DC or AC motor,
It is connected to the original 2. Therefore, the motor 3 acts on the original fabric 2, and a driving or braking torque is applied to the original fabric 2, whereby the original fabric 2 is driven or braked, rotates, and unwinding tension is applied to the winding material 1. The detector 4 is composed of a load detector such as a load cell. The winding material 1 unwound from the material 2 is guided to the detection roller 5, and the detector 4 is combined with the support shaft of the detection roller 5, and the support shaft is It is supported by the detector 4. Therefore, the unwinding tension of the winding material 1 acts on the detection roller 5 and the detector 4, and the unwinding tension of the winding material 1 is detected by the detector 4.

Further, a feedback control device 6 is connected to the motor 3, the command section and the detector 4. The feedback control device 6 is for controlling the driving or braking torque of the motor 3, has a driver 7, and the pulse generator 8 detects the rotation speed of the motor 3, and the driver 7 receives the detection signal N. Then, based on the winding tension pattern command P and the detection signal T of the detector 4,
The drive or braking torque of the motor 3 is feedback-controlled, and as shown in FIG. 3, the unwinding tension T2 of the winding material 1 is controlled in a pattern similar to the control pattern of the winding tension T1.

Further, between the original fabric 2 and the winding roll,
The feed roller is driven and rotated by the motor, and the winding material 1 is fed by the feed roller and runs. Regarding the traveling speed, the command unit of the central control unit issues a speed command, and the rotational speed of the feed roller is controlled by the speed command, whereby the traveling speed of the winding material 1 is controlled.
Therefore, the roller-bearing tension T3 acts on the feed roller and bears it.

Therefore, in this device, the winding tension T1
And the unwinding tension T2 have a similar relationship to each other, and as the winding diameter D increases, the winding tension T1 changes according to the characteristic straight line and decreases, and the unwinding tension T2 also changes along the characteristic straight line and decreases. To do. Therefore, regardless of the increase of the winding diameter D, the winding tension T1 and the unwinding tension T2 are balanced with each other between the material roll 2 and the winding roll, and the roller-bearing tension T3 is minimized to a constant value. To be kept. Therefore, even if the speed of the slitter is increased and the traveling speed of the winding material 1 is increased, no slip occurs between the winding material 1 and the feed roller.
Therefore, the winding tension T1 is accurately controlled, and the winding material 1
Can be accurately wound up.

Although a specific characteristic straight line or characteristic curve may be used as a control pattern of the winding tension T1, a variable x such as a winding diameter D, a winding length, a traveling speed, etc., in the winding process. In some cases, the winding tension T1 may be calculated. This can be expressed by the following formula.

T1 = y = f (x)

In this case, the winding tension pattern command P is issued according to the calculation result y, and the winding tension T1 of the winding material 1 is controlled according to the set pattern based on the winding tension pattern command P. At the same time, based on the winding tension pattern command P, the unwinding tension T2 of the winding material 1 is controlled with a pattern similar to the control pattern of the winding tension T1.

In the embodiment shown in FIG. 1, even if the brake is connected to the material web 2 instead of the motor 3, it is possible to apply a braking torque to the material web 2 and to apply the unwinding tension to the winding material 1. Further, when the feedback control device is connected to the brake, the command section and the detector 4 and the braking torque of the brake is feedback-controlled based on the winding tension pattern command P and the detection signal T of the detector 4, the winding material 1 is wound. The output tension T2 can be controlled with a pattern similar to the control pattern of the winding tension T1, and the same effect can be obtained. The brake may be a powder brake or an air brake as long as it can control the braking torque.

FIG. 2 shows another embodiment. The motor 3 is connected to the web 2, and the web 2 is driven and rotated by the motor 3 as in the apparatus shown in FIG. 1, but in this embodiment, the dancer roller 9 is supported by a movable member and wound. When the material 1 is unwound from the web 2, the dancer roller 9 engages the material 1. The movable member is the swing arm 10.
It can be swung around its fulcrum.
Further, the air cylinder 11 is used as a load mechanism,
The air cylinder 11 is connected to the arm 10, air pressure is supplied to the air cylinder 11, and the air cylinder 11 acts on the arm 10. Therefore, a load is applied to the arm 10 and the dancer roller 9, and the unwinding tension is applied to the winding material 1. Further, the detector 12 is provided at the fulcrum of the arm 10, and when the arm 10 swings, the detector 12
Is detected by. As a result, the position of the dancer roller 9 is detected.

Further, a feedback control device 13 is connected to the motor 3 and the detector 12. The feedback control device 13 is for controlling the rotation speed of the motor 3, and has a driver 7. Further, the command unit of the central control unit issues a speed command V, the pulse generator 8 detects the number of rotations of the motor 3, and based on the speed command V, the motor rotation number detection signal N, and the detection signal L of the detector 12, the motor The rotation speed of 3 is feedback-controlled. Therefore, the rotation speed of the original 2 is feedback-controlled, and the position of the dancer roller 9 is maintained at a constant position.

Further, as the load control device, the electropneumatic converter 1
4 is used, and the electropneumatic converter 14 is connected to the command unit and the air cylinder 11. Then, based on the winding tension pattern command P of the command section, the air pressure of the air cylinder 11 is controlled by the electropneumatic converter 14, and the load thereof is adjusted and changed. The unwinding tension T2 of is controlled with a pattern similar to the control pattern of the winding tension T1.

The present invention can be applied not only to the slitter but also to another winding device.

[0024]

As described above, according to the present invention, the unwinding tension T2 of the winding material 1 is controlled with a pattern similar to the control pattern of the winding tension T1. Therefore, the winding tension T1 and the unwinding tension T2 are balanced with each other, and the roller load tension T3 is minimized and kept at a constant value. Therefore, even if the speed of the winding device is increased and the traveling speed of the winding material 1 is increased, slipping does not occur between the winding material 1 and the feed roller, and the winding tension T1 is accurately controlled. Can be accurately wound up. Moreover, regarding the unwinding tension T2, the unwinding tension pattern command P may be used as it is, and the unwinding tension T2 of the winding material 1 may be controlled by the winding tension pattern command P. There is no need to put it out, the cost is low, and the initial purpose can be achieved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing another embodiment.

FIG. 3 is a graph showing a characteristic straight line of the apparatus of FIGS. 1 and 2.

FIG. 4 is a graph showing a characteristic straight line of a conventional device.

[Explanation of symbols]

 T1 Winding tension T2 Unwinding tension P Winding tension pattern command 1 Winding material 2 Raw fabric 3 Motor 4 Detector 6 Feedback control device 9 Dancer roller 10 Swing arm 11 Air cylinder 12 Detector 13 Feedback control device 14 Electropneumatic converter

Claims (3)

[Claims] 1. A winding type in which a winding material is unwound from a raw material, wound on a winding roll, and a winding tension of the winding material is controlled according to a set pattern based on a winding tension pattern command of a command section. In the winding device, the winding tension of the winding material is controlled based on a winding tension pattern command of the command unit by a pattern similar to the control pattern of the winding tension. Force control method. 2. A winding type in which a winding material is unwound from a raw material, wound on a winding roll, and a winding tension of the winding material is controlled according to a set pattern based on a winding tension pattern command of a command section. In the take-up device, a motor or a brake that is connected to the original fabric, applies a driving or braking torque to the original fabric, and applies an unwinding tension to the winding material, and a detector that detects the unwinding tension of the winding material. Connected to the motor or brake, the command unit and the detector, based on the winding tension pattern command and the detection signal of the detector, feedback control the drive or braking torque of the motor or brake, the winding Unwinding tension control of the winding device, which comprises a feedback control device for controlling the unwinding tension of the winding material with a pattern similar to the control pattern of the winding tension. apparatus. 3. A winding type in which a winding material is unwound from a raw material, wound on a winding roll, and the winding tension of the winding material is controlled according to a set pattern based on a winding tension pattern command of a command section. In the take-up device, a motor that is connected to the original fabric and rotates the original fabric; a dancer roller that engages a winding material that is unwound from the original fabric; a movable member that supports the dancer roller; A load mechanism that is connected to a member, applies a load to the movable member and the dancer roller, and applies an unwinding tension to the winding material, a detector that detects the position of the dancer roller, and is connected to the motor and the detector Based on the detection signal of the detector, feedback control the rotational speed of the original fabric, the feedback control device to keep the position of the dancer roller at a constant position, Connected to the command unit and the load mechanism, the load of the load mechanism is changed based on the winding tension pattern command of the command unit, and the unwinding tension of the winding material is similar to the control pattern of the winding tension. The unwinding tension control device for the winding device, which comprises a load control device that controls the pattern according to the above.