JPH07206266A - Torque control method for winding device - Google Patents

Abstract

(57) [Summary] [Purpose] The torque of the winding device is switched in a short time. [Structure] In a torque control method of a winding device 4 configured to transmit a rotating force of a main motor 1 to a winding shaft 3 via a speed reducer 2, a rotating shaft 5 of the main motor 1 is connected to a winding shaft 5 via a clutch 6. When the torque of the winding shaft 3 is detected and the detected value exceeds the set torque, a drive command is given to the auxiliary motor 7 and the main motor 1 and the auxiliary motor 7 are connected. The rotation speed of the auxiliary motor 7 is detected, the difference is calculated, and when the difference becomes equal to or less than a set value, the clutch 6 is operated to set the main motor 1
And a rotation shaft 5 and 8 of the auxiliary motor 7 are connected to each other to apply a torque to the winding shaft 3, and a torque control method for the winding device. [Effect] The winding efficiency is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque control method for a winding device for a long material such as a steel strip.

[0002]

2. Description of the Related Art Conventionally, when controlling the winding of a long material such as a steel strip, it is possible to control the winding diameter ratio to about 1:10 and the speed ratio to about 1: 100. Although it is desirable for effective use, if such a control is performed using a single motor, a motor having the ability to match the maximum torque during winding must be used. There is a problem that a motor having an unnecessarily large capacity has to be installed during normal operation other than the above, which is economically wasteful.

As a technique for solving such a problem, there is a technique disclosed in JP-A-1-226670. As shown in FIG. 3, the tension control driving method in the winding device based on this technique is such that the winding shaft 21 is connected to one end of the rotation shaft 23 of the main motor 22,
The other end of the rotary shaft 23 is connected to the rotary shaft 26 of the geared motor 25 via the clutch unit 24, and the rotational speed and torque of the winding shaft 21 are detected. In comparison, the main motor 22 or the geared motor 25 applies a driving force to the winding shaft 21 in order to apply a required torque to the winding shaft 21.

[0004]

However, the technique disclosed in Japanese Patent Laid-Open No. 1-226670 mentioned above has the following problems. That is, when operating the clutch to connect the rotating shaft of the main motor and the rotating shaft of the geared motor, the rotating speed of both rotating shafts cannot be connected unless the rotating speeds of both rotating shafts are the same. Since it is necessary to visually check that the rotational speeds have become the same by using a speedometer and then to engage the clutch, there is a problem in that there is a time delay and the efficiency decreases.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and provides a torque control method for a winding device in which no time delay occurs when the clutch is engaged. It is an object.

[0006]

A torque control method for a winding device according to the present invention is a torque control method for a winding device configured to transmit the rotational force of a main motor to a winding shaft via a speed reducer. In, so that the rotation shaft of the auxiliary motor can be connected to the rotation shaft of the main motor via a clutch,
When the torque of the winding shaft is detected and the detected value exceeds the set torque, a drive command is given to the auxiliary motor and
The rotation speeds of the main motor and auxiliary motor are detected and the difference between them is calculated.When the difference becomes less than a set value, the clutch is activated to connect the rotation shafts of the main motor and auxiliary motor to the winding shaft. It is designed to give torque.

[0007]

In the torque control method for the winding device according to the present invention, when the winding device that requires high torque is started,
The clutch is activated to connect the rotating shafts of the main motor and auxiliary motor, and then the main motor and auxiliary motor are driven simultaneously to apply torque to the winding shaft. Then, when the torque of the winding shaft is detected and the detected value becomes equal to or less than the set torque, the clutch is disengaged and only the main motor applies a low torque to the winding shaft.

When the winding diameter becomes large and the detected torque detected by the winding shaft exceeds the set torque again, the auxiliary motor is rotated and the rotational speeds of the main motor and the auxiliary motor are detected to calculate the difference. Then, when the difference becomes less than the set value, the clutch is activated again and the rotating shafts of the main motor and auxiliary motor are connected to give high torque to the winding shaft.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A torque control method for a winding device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory diagram showing this control method, and FIG. 2 is a block diagram showing a control procedure.

The torque control method for the winding device is the torque control method for the winding device 4 configured to transmit the rotational force of the main motor 1 to the winding shaft 3 via the speed reducer 2.
The rotating shaft 5 of the auxiliary motor 7 can be connected to the rotating shaft 5 of the main motor 1 via the clutch 6, and the winding shaft 3
Is detected and the detected value exceeds the set torque, a drive command is given to the auxiliary motor 7, the rotation speeds of the main motor 1 and the auxiliary motor 7 are detected, and the difference is calculated, and the difference is calculated. When is less than the set value, the clutch 6 is activated, and the main motor 1 and the auxiliary motor 7
The rotating shafts 5 and 8 are connected to apply torque to the winding shaft 3.

The torque control method will be described in more detail below.
The torque of the winding shaft 3 is detected by a torque detector 9 provided at one end of the winding shaft 3. Then, the detected torque signal is sent to the torque comparison and determination unit 10 and compared with a preset setting torque. When the detected torque shifts from a side larger than the set torque to a smaller side, the torque comparison and determination unit 1
A command is issued from 0 to the clutch controller 11, and the clutch 6 is disengaged by the clutch controller 11.

When the detected torque shifts from a side smaller than the set torque to a side larger than the set torque, the torque comparison / determination unit 10
The auxiliary motor 7 starts driving in response to a command from the.
The rotation speed of the main motor 1 and the rotation speed of the auxiliary motor 7 are detected by the rotation speed detectors 12 and 13 provided on the rotary shafts 5 and 8, respectively, and both rotation speed signals are sent to the rotation speed difference calculator 14. Sent.

When the rotational speed difference calculated by the rotational speed difference calculator 14 becomes smaller than the preset speed difference, the rotational speed difference calculator 14 issues a command to the clutch controller 11 to cause the clutch controller to operate. Clutch 6 by 11
Goes in. As a result, torque is applied to the winding shaft 3 by the main motor 1 and the auxiliary motor 7.

FIG. 2 is a block diagram showing a series of procedures for the winding control of the above-described winding device. At the time of starting, the clutch 6 is put in and the winding shaft 3 is raised by the main motor 1 and the auxiliary motor 7. A torque is applied, and in the middle, the clutch 6 is disengaged to give a low torque to the winding shaft 3, and when the winding diameter becomes large, the rotation speeds of the main motor 1 and the auxiliary motor 7 are made the same, and then the clutch 6 is again provided. Put the main motor 1
And the control procedure of giving a high torque to the winding shaft 3 by the auxiliary motor 7.

[0015]

According to the present invention, the winding can be performed without causing a time delay when the clutch is engaged, and the efficiency is improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a control method of a winding device of the present invention.

FIG. 2 is a block diagram showing a control procedure of the winding device of the present invention.

FIG. 3 is an explanatory diagram showing a conventional method of controlling a winding device.

[Explanation of symbols]

 1 Main Motor 2 Reducer 3 Winding Shaft 4 Winding Device 5 Main Motor Rotation Shaft 6 Clutch 7 Auxiliary Motor 8 Auxiliary Motor Rotation Shaft 9 Torque Detector 10 Torque Comparison Judge 11 Clutch Controller 12 Rotation Speed Detector 13 Rotational speed detector 14 Rotational speed difference calculator

Claims (1)

[Claims] 1. A torque control method for a winding device configured to transmit the rotational force of a main motor to a winding shaft via a speed reducer, wherein the auxiliary motor rotates via a clutch on the rotating shaft of the main motor. When the torque of the winding shaft is detected and the detected value exceeds the set torque, a drive command is given to the auxiliary motor and the rotation speeds of the main motor and auxiliary motor are detected and A winding device, wherein a difference is calculated, and when the difference becomes equal to or less than a set value, the clutch is operated to connect the rotating shafts of the main motor and the auxiliary motor to apply torque to the winding shaft. Torque control method.