JP2010159092A - Winding control device for long medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize the length of wound product rolls by solving such a problem that a winding device controlled in a fixed deceleration pattern produces some variation in the length regardless of the conditions of stock rolls. <P>SOLUTION: The winding control device for long medium repeatedly performs operation control by accelerating and decelerating a motor 7 of the winding device, which includes the stock roll 2 into which a long medium 3 has been wound up, and a motor 7 for turning the stock roll 2. This device includes: an inverter 8; and means for storing output current data during the acceleration and output current data during deceleration of the motor 7 by the inverter 8 in a plurality of pairs. This device detects output current of the inverter 8 during acceleration, acquires from the storing means an output current value during deceleration corresponding to the detected output current value, and performs deceleration control of the motor 7 with the output current value during deceleration. When the winding device, having been installed with the winding control device for long medium, is adjusted, the winding control device acquires and stores output current data during acceleration and output current data during deceleration in pairs at a plurality of positions where the winding radii of the long medium differ. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a long medium winding control device, and more particularly, to an operation method at the time of decelerating winding of a long medium having a planar structure and being thin and flexible and having a length longer than a width.

  In a winding facility that uses a roll of a large roll made of web of paper, cloth, film, metal thin film, thin steel plate, etc. and wound up to a specified length from the roll, the main winding The winder of the apparatus which becomes becomes performs detection and control of length (refer patent documents 1 and 2). A general-purpose motor is applied as a motor for winding, and its speed control and operation stop are controlled by an inverter, and the inverter operates according to a command from a winder. The winder detects and determines the winding length from the number of rotations of the winding rotor or the like, and stops the operation of the inverter. The inverter that has received the operation stop performs control to reduce the motor rotation to zero in order to stop the raw roll. It is fixed because it is based on the slope setting of the speed change of the acceleration and deceleration of the inverter control, and the same speed change slope because of the constant control regardless of the thickness change of the raw roll.

JP-A-9-91023 JP-A-5-64476

  As the product roll is repeatedly wound, the thickness of the original roll decreases, and the weight of the original roll changes, so the moment of inertia also changes. The speed control and the control of the winding length are accurate at the time of accelerating or winding at a constant speed and are not easily affected by the raw roll, but tend to be easily affected by the control at a low speed by deceleration. However, the inclination of the motor deceleration due to the inverter control is fixed, and the same control is performed regardless of the change in the weight of the original roll. Therefore, a slight variation occurs, causing a difference in the winding length.

  It is an object of the present invention to provide means for detecting a change in a raw material roll on the inverter side and controlling a U-shaped deceleration curve at the time of deceleration with a PLC in accordance with the change.

The present invention has the following characteristics based on the above problems.
Data is acquired by measuring changes in the raw material roll in advance as changes in the motor current during acceleration for some parts such as the surface layer, the middle layer, and the core layer. Using this data, the thickness change of the raw roll is judged and read in comparison with the motor current at the time of actual product winding. The degree of swelling of the U-shaped deceleration curve of the winding deceleration is determined from the change in the raw roll and applied to the speed control.

  That is, the present invention relates to a long-medium winding control in which the motor of a winding facility including a raw roll wound with a long medium and a motor for rotating the raw roll is accelerated and decelerated to repeatedly perform operation control. The apparatus includes: an inverter that performs rotation control of the motor; and storage means that stores a plurality of output current data during acceleration and output current data during deceleration of the motor by the inverter as a pair, and at least two times of the motor The inverter output current at the time of acceleration is detected, the deceleration output current value corresponding to the detected acceleration output current value is acquired from the storage means, and the motor is decelerated and controlled by the acquired deceleration output current value This is a long medium winding control device.

  Further, according to the present invention, in the long media winding control device, when the long winding control device is attached to the winding equipment for adjustment, the output current data and deceleration during acceleration of the motor by the inverter are adjusted. This is a long medium winding control device that acquires and stores output current data as a pair at a plurality of positions where the winding radius of the long medium wound around the original roll is different.

  Then, the present invention provides the long-medium winding control device, wherein the motor is wound on the roll of the long medium wound on the original roll based on output current data when the motor is decelerated by the inverter. Is a long-medium winding control device that performs deceleration control by finely adjusting the degree of swelling of the U-shaped curve during deceleration at different positions.

  According to the present invention, the variation in the length of the product wound from the raw roll is reduced, and the expected length can be commercialized. If the accuracy of the winding length is improved, it is possible to adjust the reduction in length of the extra winding portion, which can contribute to cost reduction. From the control facility side, it can be handled by the control on the inverter side that drives the motor, so there is no burden of adding a measuring instrument to the machine side to the winder or the like, and the introduction study is relatively easy.

It is a structural example figure of the winding equipment as an Example of this invention. It is an example figure of the motor current measured by accelerating the original fabric roll. It is an example figure of the U character deceleration when changing the deceleration time of a winding character according to the thickness of an original fabric roll. It is explanatory drawing of the procedure which applies the speed control at the time of winding deceleration in PLC of FIG.

The best mode for carrying out the present invention will be described.
Embodiments of the long media winding control device of the present invention will be described below with reference to the drawings.

  1-4 is explanatory drawing of the Example of the elongate medium winding control apparatus of this invention. FIG. 1 is a configuration diagram of a winding facility as an embodiment of the present invention. FIG. 2 is a diagram showing an example in which an original fabric roll in the facility of FIG. 3 is a diagram showing an example of U-shaped deceleration that is controlled by changing the deceleration time in accordance with the difference in motor current during acceleration when the winding is actually performed, and FIG. 4 is a winding in the PLC of FIG. It is explanatory drawing of the procedure which applies the speed control at the time of deceleration.

  In FIG. 1, 1 is a winder, 2 is unwound with a roll of raw material, and a product roll 6 is made. Is done. Reference numeral 3 denotes a long medium unwound from the web roll 2 by a web. 4 is a feed roller, and 5 is a press roller that prevents air from being mixed during winding. When 6 is a product roll, the next roll core is set. 7 is a motor that rotates and stops the roll 2 in accordance with the production of the product roll 6. 8 is a general-purpose inverter that changes the speed of motor rotation. Although not clearly shown in the figure, a PLC for controlling internal devices is also installed in the winder 1, and an instruction indicating the timing of the operation stop at the start of the inverter operation at the start of winding and the deceleration at the end of winding is displayed by the inverter. 8 is performed. Reference numeral 9 denotes a PLC which gives a speed control command to the inverter 8.

  In FIG. 2, the maximum motor current value during acceleration at the start of winding is measured in advance in order to perform the change with the difference in motor current so that the change in thickness and weight of the fabric roll 2 can be detected. The data is measured at a necessary location according to the thickness change of the raw roll 2 and the data is reflected in the PLC ladder program and stored.

  In FIG. 3, it is a figure which shows the difference of the deceleration when winding and stopping, and U-shaped deceleration is performed in order to prevent the winding wrinkle before a stop. The deceleration time when performing U-shaped deceleration is a bulge with a slight difference in accordance with the thickness and weight of the raw roll 2. That is, the control of changing the characteristic curve of the U-shaped deceleration is performed depending on whether the thickness of the raw roll 2 is thick and the weight is desired, or when the thickness is thin and the weight is light. In the present invention, this is executed by a PLC speed command. In the prior art, this control is executed by the inverter in response to an instruction to stop the operation from a winder that detects and determines the winding length based on the rotation speed of the winding rotor or the like.

The procedure in the present embodiment will be described with reference to FIG.
(1) The maximum value of the motor current at the time of acceleration is acquired and converted into data according to the thickness and weight that change as the material roll 2 is wound up by the previous measurement (step S402).
(2) In actual control, the motor current during acceleration at the beginning of winding is detected from the inverter 8, and the maximum value is judged and determined by the PLC 9 (step S403).
(3) When the inverter 8 decelerates after the winding operation is stopped, the thickness / weight state of the raw roll 2 is predicted from the motor current value, and the U-shaped deceleration curve swells in accordance with the state. The condition is determined (step S404).
(4) Deceleration speed control is performed with the U-shaped deceleration curve using the determined gain, and the rotation speed is instructed from the PLC 9 to the inverter 8 to stop (step S405).
The above-described control in steps S403 to S405 is repeated for each product roll 6.
In the present embodiment, the output current data at the time of acceleration of the motor 7 by the inverter 8 and the output current data at the time of deceleration are paired, and a plurality of positions at different winding radii of the raw fabric roll 2, for example, the surface layer, the middle layer, and the core layer Data is acquired in advance and converted into data. During actual control, the motor current during acceleration at the beginning of winding is detected from the inverter 8, and compared with the previously acquired data, it is one of the surface layer, middle layer, and core layer Thus, output current data at the time of deceleration corresponding to the estimated winding radius can be obtained, and appropriate deceleration control can be performed without measuring the winding radius of the original roll 2. In the prior art, the control is constant without considering the winding radius of the raw roll 2.

1 ... winder,
2 ... Raw roll,
3 ... Web,
4 ... feed roller,
5 ... Presser roller,
6 ... Product roll,
7 ... motor,
8: Inverter,
9 ... PLC

Claims (3)

In a long-medium winding control apparatus that accelerates and decelerates the motor of a winding facility including a raw roll wound with a long medium and a motor that rotates the raw roll, and repeatedly performs operation control.
An inverter for controlling the rotation of the motor; and storage means for storing a plurality of output current data at the time of acceleration of the motor and output current data at the time of deceleration by the inverter, and at least two times of acceleration of the motor Detecting the output current of the inverter, obtaining the output current value during deceleration corresponding to the detected output current value during acceleration from the storage means, and decelerating the motor with the acquired output current value during deceleration. A long-medium winding control device. In the long media winding control device according to claim 1,
When adjusting the long winding control device to the winding equipment, the output current data at the time of acceleration of the motor and the output current data at the time of deceleration by the inverter are wound around the raw roll. A long-medium winding control device that acquires and stores a pair as a pair at a plurality of positions at which the winding radius of the long medium differs. In the long media winding control device according to claim 1,
Based on the output current data when the motor is decelerated by the inverter, the motor has a slight U-curve swell when decelerating at a position where the winding radius of the long medium wound around the original roll is different. A long-medium take-up control device that is adjusted and decelerated.

Images