JP2001328766A - Tension control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stable tension control in the case of large variation of wire tension. SOLUTION: The wire 2 unreeled from a wire bobbin 1 reaches a work 10 with a rectangular cross section through an initial tension controller 3, a first guide roller 4, a roller 5 for removing slack, a second guide roller 6, a first pulley 7, a second pulley 8, and a tension roller 9, and is wound-up by a winder 11 in the direction of an arrow A. The angles of rotation of the first and the second pulleys 7, 8 are detected by a first and a second encoders 12, 13, and are input into a CPU 18 as a first and a second feed speeds V1, V2 together with a winding signal. An elongation of the wire 2 between the first and the second pulleys 7, 8 is calculated in real time, and a torque of an electrically driven servo motor 14 attached to the first pulley 7 is controlled through a motor driver 15 so as to keep the elongation constant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension control device used for winding a coil, a fiber, a tape, or the like.

[0002]

2. Description of the Related Art Conventionally, as this kind of tension control device,
Wires or tapes (hereinafter referred to as "rolled material") are wound around a pulley at a predetermined angle, the force applied to the pulley is detected and the tension itself is fed back, or the rolled material is wound at a predetermined angle. A pulley has been used which elastically supports and feeds back such that the supporting position is constant.

[0003]

However, such a conventional tension control device is effective when the cross-sectional shape of the winding member is substantially circular and the change in the winding speed is small. When the cross-sectional shape of the take-up member is, for example, a square cross-section and the take-up speed is high, the take-up speed periodically fluctuates greatly, and the material to be wound vibrates violently and extends from a region where it relaxes. The tension fluctuates up to the plastic region. For this reason, there has been a problem that the change of the tension within a predetermined time is so severe that control becomes impossible.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide a tension control device capable of performing stable tension control even when the speed of a material to be wound fluctuates drastically. Aim.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the present invention is a tension control device for controlling the tension of a material to be wound in a winding device. The first to wind each material
Pulley, second pulley, first detecting means and second detecting means for detecting the feed speed of the material to be wound wound on the first pulley and the second pulley, respectively, The elongation between the first and second pulleys of the material to be wound is detected from the difference between the first feed speed and the second feed speed detected by the first detection unit and the second detection unit, respectively. , So that the elongation is constant.
And a control means for controlling the rotation of the pulley.

In the above tension control device, the first
The detecting means and the second detecting means preferably comprise encoders, respectively, and the control means receives signals from the first detecting means and the second detecting means to input a signal from the first detecting means and the second detecting means. It is preferable that a central processing unit that calculates the elongation between the first and second pulleys in real time and an electric servomotor that performs torque control based on the calculation result of the central processing unit.

[0007] The tension control device according to the present invention can stably control the tension even when the speed of the material to be wound fluctuates drastically by employing the above-described structure. Can be speeded up.

[0008]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment in which the present invention is applied to a winding machine using an experimental apparatus.

A wire 2 as a material to be wound out of a wire bobbin 1 as a wire supply source is inserted through a well-known initial tension adjusting device 3 provided with an adjusting screw for adjusting an initial tension. The first pulley 7 on the feeding side and the second pulley 8 on the winding side respectively pass through a guide roller 4, a slack removing roller 5 provided at the end of a slack removing arm 5a made of an elastic body, and a second guide roller 6. After being wound, the work reaches a work (corresponding to a rotor core of a motor) 10 having a square cross section, which is a winding member, via a tension roller 9, and is wound in a direction indicated by an arrow A by an experimental winding machine 11.

First and second encoders 12 and 13 are attached to the first and second pulleys 7 and 8, respectively, to feed out the wire 2 wound around the first and second pulleys 7 and 8. The feed speeds of the side and the winding side can be measured respectively. An electric servomotor 14 for controlling tension is attached to the first pulley 7 and is driven to rotate by a motor driver 15.

A winding signal from the winding machine 11 indicating whether the winding machine 11 is winding or waiting is sent to the first and second encoders via a signal / digital amount converter 16. 12,
The first and second pulses from 13 are converted to first and second feed speeds V1 and V2 via a pulse / peripheral speed converter 17,
Each is taken into a central processing unit (hereinafter, referred to as “CPU”) 18, and the CPU 18 determines a command torque to the electric servomotor 14 accordingly. Thereby, the feed speed of the wire 2 and the first and second pulleys 7,
It is possible to calculate the elongation between 8 and control the torque of the electric servomotor 14 so that the elongation becomes constant.

The above operation will be described more specifically.
The winding signal from the winding machine 11 changes the target value so that a different tension is applied depending on whether the winding is in progress or in standby. This value is one of parameters that can be specified by the user. Optimum tension can be supplied to the controlled object by freely changing the characteristics of the material and the operation mode of winding.

In the winding, the difference between the first and second feed speeds V1 and V2 is set so that the elongation of the wire 2 between the first and second pulleys 7 and 8 becomes a predetermined target pattern. The sum of the proportional signal, the signal obtained by differentiating the difference between the first and second feed speeds V1 and V2, and the target pattern signal multiplied by various gains is calculated as the command torque. The calculated result is D / A converted by the D / A converter 19 so as to correspond to the voltage applied to the motor driver 15. Note that the above calculation is executed in real time at every predetermined sampling cycle.

As described above, as a result of the active tension control of the wire, as compared with the passive tension control of the conventional tension control device, the wire breakage occurring during the winding operation involving a severe tension change is prevented. In addition to this, it has a significant effect on controlling the distortion of the coil winding.

In the above-described embodiment, the first and second encoders are attached to the first and second pulleys to measure the wire feed speed.
It is also possible to detect the feed speed of the wire from the rotational angular displacement of the first and second pulleys using first and second resolvers instead of the encoder of (1). The present invention can be applied not only to a winding machine of a motor core but also to any speed pattern of a coil winding. Further, the present invention can be applied not only to winding of a coil, but also to winding of a fiber, tape or film. It is possible to apply.

[0016]

As described above, according to the tension control device of the present invention, stable tension control is performed even during winding with severe tension fluctuation, thereby preventing cutting and distortion of the material to be wound. And the speed of the winding operation can be increased.

In the above apparatus, the first and second detecting means each comprising an encoder can detect a high-accuracy feed speed with a simple configuration, and the control means is replaced by a central processing unit. And the electric servo motor, it is possible to supply the tension optimal for the characteristics of the material to be wound and the winding operation mode.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

[Explanation of symbols]

1: wire bobbin 2: wire (material to be wound) 3: initial tension adjusting device 7: first pulley 8: second pulley 10: work (winding member) 11: winding machine 12: first encoder ( 1st detection means) 13: 2nd encoder (2nd detection means) 14: Electric servo motor (control means) 18: CPU (control means)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiro Koya 1603-1 Kamitomiokacho, Nagaoka City, Niigata Prefecture Inside Nagaoka University of Technology (72) Inventor Masaaki Nishimura 4289 Yoshidajima Kaiseicho, Ashikaga-gun, Kanagawa 4289 Odawara Engineering Co., Ltd. (72) Inventor Nobuo Miyawaki 4289 Yoshidajima, Kaisei-cho, Ashikaga-gun, Kanagawa F-term in Odawara Engineering Co., Ltd. (reference) 3F111 AA01 AA06 AB01 AB08 CA16 DA08 DB09 DC03 DD02 DE01

Claims (3)

[Claims] 1. A tension control device for controlling the tension of a material to be wound in a winding device, comprising: a first pulley and a second pulley for winding the material to be wound on a winding side and a payout side, respectively; A first detecting means and a second detecting means for detecting a feed speed of a material to be wound wound on the first pulley and the second pulley, respectively, and a first detecting means and a second detecting means. The elongation between the first and second pulleys of the material to be wound is detected from the difference between the first feed speed and the second feed speed detected by the detecting means, and the elongation is constant. And a control means for controlling the rotation of the first pulley. 2. The first detecting means and the second detecting means,
2. The method according to claim 1, wherein each of the encoders comprises an encoder.
A tension control device as described. 3. A central processing unit for inputting signals from the first detecting means and the second detecting means to calculate the elongation of the material to be wound between the first and second pulleys in real time. 3. The tension control device according to claim 1, further comprising an electric servomotor that performs torque control based on a calculation result of the central processing unit.