JPH0592216A - Coil winding / rewinding device - Google Patents

Abstract

(57) [Abstract] [Purpose] Accurately control the coil speed by measuring the coil radius and the coil winding speed or rewinding speed with high accuracy. A displacement meter 11 for detecting a distance to a coil outer peripheral surface 101, a servo mechanism 20 for moving the displacement meter 11 so that the displacement meter 11 maintains a constant distance l ₀ with the coil outer peripheral surface 101, and the displacement. A movement amount detector 23 that detects the movement amount Δl of the total 11, and a calculator 30 that calculates the length L of the coil 100 wound around the reel 2 by the detected movement amount Δl.
In the coil winding / rewinding device having the above, the displacement meter is a laser rangefinder, and the laser rangefinder is integrally provided with a laser Doppler velocity meter 12 for detecting the peripheral speed of the coil. Controls the winding or rewinding speed of the coil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding / rewinding device of Kotel for winding or rewinding a coil at a desired speed by measuring a coil radius.

[0002]

2. Description of the Related Art In a manufacturing line handling a strip-shaped body wound in a coil, it is possible to prevent damage to manufacturing equipment,
In order to improve work efficiency, the winding speed and the rewinding speed of the coil are controlled according to the radius of the coil.

Therefore, in order to accurately control the winding speed,
It is necessary to detect the remaining length of the coil.

A conventional device of this type is shown in FIG.

[0005] This device, when the reel 52 by one revolution rewind the coil 100 detects the feeding amount l _B of the coil 100 while the reel 52 rotates once a roll 54, wherein the arithmetic unit 60

[Equation 1] Is calculated to obtain the coil radius R.

Then, the coil radius R obtained by the above equation (1)
And the coil heat t detected by the thickness gauge 56

[Equation 2] Is calculated to obtain the remaining length L of the coil. Where R
₀ is the radius of the reel 52, and π is the pi.

The peripheral speed of the coil 100 is controlled by, for example, the method described in Japanese Patent Laid-Open No. 58-100914.

However, in the apparatus of FIG. 5 described above,
In order to obtain the remaining length L of the coil 100, the two pulse generators 53 and 55 and the thickness gauge 56 are indispensable, so that the structure of the entire apparatus becomes complicated.

Further, since the roll 54 is brought into contact with the coil 100 to detect the coil feed amount l _B per reel rotation, the roll 54 slips, wear of the roll 54 occurs, etc. l The detection of _B goes wrong. As a result, there has been a problem that the coil is decelerated and stopped in an inappropriate coil remaining length state.

As a technique for solving this problem, an invention and a device for controlling the winding speed and the rewinding speed of the coil by obtaining the coil radius without bringing the member into contact with the coil are disclosed in JP-A-55-55.
11489 and 56-147907.

The invention described in JP-A-55-11489 is
The laser light is scanned in the width direction of the coil, and the laser reflected light in the specific direction is detected by the detection means such as a laser receiver having sensitivity only in the specific detection direction.

Then, by detecting the reflection angle α of the laser light at the time of detection, the coil radius at that time is calculated, and the winding speed and the rewinding speed of the coil are controlled according to the calculated values. There is.

Further, the device described in Japanese Utility Model Laid-Open No. 56-147907 discloses that the light source and the optical fiber group are arranged so as to face each other on both side portions of the wound coil, and the optical output detected by the optical fiber group and the rolling speed are set. The deceleration control is performed by using the comparison result with the deceleration command.

[0014]

However, in the invention described in Japanese Patent Laid-Open No. 55-11489, the laser beam is scanned to search for the reflection angle α at which the peak of the amount of light received by the laser receiver is obtained. It takes time, and it takes a long time to measure the coil radius.

Further, in order to improve the light reception at the laser receiver, the reflection angle α must be increased, and this angle α
If the value is increased, the sensitivity for reading the distance between the light-receiving reference plane and the coil surface is lowered, and there is a disadvantage that desired measurement accuracy cannot be obtained.

On the other hand, the device disclosed in Japanese Utility Model Laid-Open No. 56-147907 has a drawback that the measurement accuracy changes depending on the size of the coil width.

That is, if the distance between the coil end and the optical fiber group is increased depending on the coil width, the measurement accuracy is lowered due to the influence of the penumbra.

As a solution to the above, Japanese Patent Publication No. 3-56404
Is proposed. This is a non-contact type distance detector which is arranged to face a coil on a winding or rewinding reel so as to be movable in the coil radial direction, and a detection which drives this non-contact type distance detector in the coil radial direction. And a position detector that detects the amount of movement of the non-contact type distance detector in the coil radial direction of the non-contact type distance detector connected to the detector driving device. The output value of the reel is controlled by the position controller so that the output value becomes equal to the output value of the reference facing distance setting device, while the rotation speed of the reel is taken out through the rotation speed detector. Every time when reaches a predetermined value, the amount of movement of the coil in the radial direction detected by the position detector is sampled, and the coil diameter computing device computes the coil diameter of the coil based on the sampled value.

According to the Japanese Patent Publication No. 3-56404, the accuracy of measuring the coil diameter is considerably improved, but a problem remains with respect to speed control in coil winding or rewinding. In particular, when the winding coil is divided into small-sized coils and wound up, if the braking stop accuracy is increased, the winding speed cannot be increased, and thus the work efficiency is reduced.

The present invention has been made in order to solve the above-mentioned conventional problems, and measures the coil radius and the winding speed or rewinding speed with high accuracy to accurately control the speed of the coil. It is an object of the present invention to provide a winding / rewinding device of

[0021]

In order to achieve the above object, the present invention is provided with a rotating means for rotating a reel to wind or rewind a coil, and to be arranged to face the outer peripheral surface of the coil. A displacement gauge that detects the distance to the coil outer peripheral surface, a servo mechanism that moves the displacement gauge so that the displacement meter maintains a constant distance from the coil outer peripheral surface based on the detected distance of the displacement gauge, and a servo mechanism A coil winding having a movement amount detector for detecting the movement amount of the displacement meter by the mechanism, and a calculator for calculating the length of the coil wound around the reel from the movement amount detected by the movement amount detector. In the winding / unwinding device, the displacement meter is a laser range finder, and a laser Doppler velocimeter for detecting the peripheral speed of the coil is integrally provided with the laser range finder to measure the winding speed or winding rate of the coil. Return speed It is obtained to be able to control the.

[0022]

According to the present invention, the reel is rotated by the rotating means to wind or rewind the coil.

At this time, the distance to the outer peripheral surface of the coil is detected by the displacement meter disposed so as to face the outer peripheral surface of the coil, and the displacement gauge is moved by the servo mechanism based on the detected distance, and the displacement gauge is moved. The distance between the coil and the outer peripheral surface of the coil is kept constant.

Therefore, the movement amount of the displacement gauge indicates the increase or decrease of the coil due to winding or unwinding.

This movement amount is detected by the movement amount detector, and the length of the coil wound around the reel is calculated by the arithmetic unit based on the detected movement amount.

Therefore, if the rotation speed of the reel is controlled according to the coil length, an appropriate winding speed or rewinding speed can be obtained.

Further, the laser distance meter and the laser Doppler velocimeter can detect the coil length and the peripheral velocity of the coil in real time with high accuracy, and as a result, the winding speed or the rewinding speed can be accurately controlled. can do.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a coil winding / unwinding device of this embodiment, and FIG. 2 shows a state of the device of this embodiment as viewed from the side, with some parts omitted.

Reference numeral 1 is a motor for rotating the reel 2 around which the coil 100 is wound, and 3 is the reel 2
Is a pulse generator (PLG) that outputs a pulse to a calculator 30 described later at a timing per one rotation.

Reference numeral 10 denotes a distance / speed detector formed by integrally incorporating a laser range finder 11 aiming at the coil outer peripheral surface 101 from the radial direction of the coil 100 and a laser Doppler velocimeter 12, which contacts the coil outer peripheral surface 101. In order not to do so, the coil is arranged away from the outer peripheral surface 101.

The laser range finder 11 is, as shown in FIG.
It is a measuring instrument that irradiates the outer peripheral surface 101 of the coil with laser light, measures the distance l to the outer peripheral surface 101 of the coil with high sensitivity using the principle of triangulation, and outputs the distance signal a.

The laser Doppler velocimeter 12 includes a coil 10
It is an instrument that measures the peripheral velocity of 0 using the Doppler effect of light.

Specifically, as shown in FIG. 3, laser light beams in opposite directions are emitted from the transmission optical systems 13 and 14 onto the outer peripheral surface 101 of the coil, and the laser scattered light subjected to the positive and negative Doppler shift is received by the receiving optical system. It is received by the system 15. Then, the received optical signal is converted into an electric signal, the speed is calculated by the speed calculator 16, and the speed signal b is output.

In FIG. 1, reference numeral 20 denotes a servo mechanism for moving the position of the distance / speed detector 10 with respect to the coil outer peripheral surface 101, which includes a servo amplifier 21, a servomotor 22, and a pulse generator (PLG) 23. ing.

The servo amplifier 21 is a distance / speed detector 1
The distance signal a from the laser range finder 11 of 0 is amplified, and the distance l indicated by the distance signal a is compared with the preset reference measurement distance l ₀ . Then, a control signal c for moving the distance / speed detector 10 is output to the servo motor 22 so that the distance between the distance / speed detector 10 and the coil outer peripheral surface 101 is always the distance l ₀ . Also, the servo amplifier 21
It also has a function of amplifying the velocity signal b from the laser Doppler velocity meter 12.

The servomotor 22 receives the control signal c so that the distance between the distance / speed detector 10 and the coil outer peripheral surface 101 is always the distance l _0.
Is a motor for moving.

The pulse generator 23 is a displacement variation amount Δl of the distance / speed detector 10 moved by the servomotor 22.
Is detected from the rotation of the servo motor 22, and the displacement variation Δ
It outputs a signal indicating l.

The pulse generator 30 inputs a pulse from the pulse generator 3 at a timing of every one rotation of the coil, calculates the winding length L of the coil 100 at intervals of one pulse, and calculates the motor winding length L based on the coil winding length L. 1 is a computing unit that outputs a control signal e 1 for controlling the rotation speed of 1 to the motor 1.

FIG. 4 shows the coil winding length L performed by the arithmetic unit 30.
The calculation process of is shown.

That is, the pulse generator 23 of the servo mechanism 20
The displacement variation amount Δl input from the
Coil 1 per coil revolution, integrated at pulse intervals
The decrease amount or increase amount (integral) Δl of 00 is obtained.

Then, from the decrease amount or the increase amount (integral) Δl, the coil winding diameter calculating section 32 calculates

[Equation 3] Is calculated to obtain the winding radius R of the coil 100. Here, R ₁ is the original coil radius.

Further, from the coil winding radius R and the displacement variation Δl, the coil winding length calculation unit 33 calculates the equation.

[Equation 4] Is calculated to obtain the coil winding length L, and the value L is displayed on the display unit (not shown). Here, R ₀ is the radius of the reel 2.

A control signal e for controlling the rotation speed of the motor 1 is output from the computing unit 30 to the motor 1 by the obtained coil winding length L and the speed signal b from the laser Doppler speed meter 12.

Next, the operation of this embodiment will be described.

However, in order to facilitate understanding, here,
The rewinding operation will be mainly described.

When the reel 2 is rotated by the motor 1 and the coil 100 is rewound as shown by the arrow in FIG. 2, the radius of the coil 100 decreases.

In accordance with this, a distance signal a indicating the distance l between the distance / speed detector 10 and the coil outer peripheral surface 101 is input from the laser range finder 11 to the servo amplifier 21, and the servo receiving the control signal c is received. The motor 22 moves the distance / velocity detector 10 to the left according to the degree of decrease of the coil 100. As a result, distance / speed detector 1
The distance between 0 and the coil outer peripheral surface 101 is the reference measurement distance l ₀
Kept in.

At this time, the laser range finder 11 measures the distance by the principle of triangulation without using a reflection mirror or the like, which is a measurement error diagram, and therefore the measurement accuracy is high. As a result, the movement control of the distance / speed detector 10 by the servo motor 22 is performed with high accuracy (10
The accuracy of variation Δl of the distance / speed detector 10 is input to the calculator 30 from the pulse generator 23 with an accuracy of about 0 μm).

Further, with the distance between the distance / velocity detector 10 and the coil outer peripheral surface 101 kept at the reference value at the distance l ₀ , the coil outer peripheral surface 101 by the laser Doppler velocimeter 12 is constantly maintained.
The speed detection is performed and the laser Doppler velocimeter 12 outputs a highly accurate speed signal b indicating the coil peripheral speed to the servo amplifier 2
It is input to the arithmetic unit 30 via 1.

The displacement fluctuation amount Δl and the velocity signal b are continuously input to the arithmetic unit 30, but the arithmetic operation of the arithmetic unit 30 is performed at intervals of the pulses input from the pulse generator 3.

That is, the arithmetic unit 10 calculates the integral amount (integral amount) of the displacement variation Δl at the timing of one rotation of the coil.
The Δl is calculated, the coil remaining length L is calculated through the calculations of the above equations (3) and (4), and this is displayed on the display unit (not shown).

Then, the arithmetic unit 30 outputs the control signal e to the motor 1 and controls the peripheral speed of the coil 100 in accordance with the obtained coil remaining length L while referring to the input speed signal b.

Therefore, according to the apparatus of the present embodiment, the coil residual length L and the coil peripheral velocity with high accuracy can be detected in real time with a simple structure, so that when the predetermined coil residual length is reached, The rotation of the coil 100 can be automatically decelerated and stopped with high accuracy.

Regarding the winding operation of the coil 100,
The operation is similar to that described above.

That is, as the radius R of the coil 100 increases, the distance / speed detector 10 moves to the right in FIG. 1, and its displacement variation Δl is detected by the pulse generator 23, and this displacement variation Δl Based on the above, the winding length L of the coil 100 is calculated by the calculator 30. Then, the rotation speed of the motor 1 is controlled in accordance with the coil winding length L.

[0057]

As described above, according to the present invention,
The coil length around the reel, that is, the coil radius, can be detected in a non-contact manner by the displacement gauge, the servo mechanism, the movement amount detector, and the computing unit. The return speed can be obtained. Furthermore, with the laser rangefinder and laser Doppler velocimeter,
The coil radius and the peripheral velocity of the coil can be detected in real time with high accuracy, and the winding speed or the rewinding speed of the coil can be accurately controlled.

As a result, it is possible to improve work safety, work efficiency, and yield in a production line of industries such as steel and non-ferrous metals.

[Brief description of drawings]

FIG. 1 is a schematic view showing a coil winding / unwinding device according to an embodiment of the present invention.

FIG. 2 is a partially omitted side view of the present embodiment as viewed from the side.

FIG. 3 is a block diagram schematically showing the structure of a distance / velocity detector.

FIG. 4 is a flow processing diagram showing a calculation process of a calculator.

FIG. 5 is a schematic view showing an example of a conventional coil winding / unwinding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Motor (rotating means), 2 ... Reel, 3 ... Pulse generator, 10 ... Distance / speed detector, 11 ... Laser distance meter (displacement meter), 12 ... Laser Doppler speed meter, 20 ... Servo mechanism, 21 ... Servo amplifier, 22 ... Servo motor, 23 ... Pulse generator (movement amount detector), Δl ... Displacement fluctuation amount (movement amount), 30 ... Computing device, 100 ... Coil, 101 ... Coil outer peripheral surface.

Claims (1)

[Claims] 1. Rotating means for rotating a reel to wind or unwind a coil, a displacement gauge arranged to face the outer peripheral surface of the coil and for detecting a distance to the outer peripheral surface of the coil, A servo mechanism that moves the displacement gauge based on the detection distance of the displacement gauge so that the displacement gauge keeps a constant distance from the outer circumferential surface of the coil, and a movement amount detector that detects the movement amount of the displacement gauge by the servo mechanism. And a coil winding / rewinding device having a calculator that calculates the length of the coil wound around the reel from the amount of movement detected by the movement amount detector, wherein the displacement meter is a laser rangefinder. Further, a laser Doppler velocimeter for detecting the peripheral velocity of the coil is integrally provided with this laser range finder so that the winding speed or the rewinding speed of the coil can be controlled. Winding-rewinding apparatus of the coil that.