JPH11226640A - Thin steel sheet coiling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insert a paper without generating a winkle by inserting a paper at an overlap start position of a steel sheet. SOLUTION: A time T1 from an operation start of a motor 1 by ON of a switch 25 up to coiling a tip of a steel sheet for one turn on a reel is obtained by calculation, A time T2 from an operation start of a motor 7 by ON of a switch 26 up to reaching a tip of a paper one turn coiled position of the steel sheet is obtained by calculation. Further, by starting the motor 7 at the time coinciding to a difference between the time T1 and the time T2 from operation start timing of the motor 1, the paper can be inserted at an overlap start position of the steel sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a thin steel sheet conveyed at a line speed onto a motor-driven reel, and in parallel with the winding, a paper sheet between a steel sheet and a motor-driven paper unwinder. The present invention relates to a thin steel sheet take-up device for supplying paper, and more particularly to a start timing control of a paper unwinder.

[0002]

2. Description of the Related Art FIG. 4 is a mechanism diagram of a thin steel plate winding device. The reel 2 driven by the motor 1 has a steel plate 3
The paper 4 is wound together with the steel plate 3 together with the tension, and the paper 4 is inserted between the layers of the steel plate 3 to perform winding. To prevent

[0003] The paper 4 is pulled out from the paper unwinder 5 via a guide roll 6 or the like, and the paper unwinder 5 is provided with a certain tension to prevent the paper from being "wrinkled". A driving force in the opposite direction is generated in the coupled motor 7. 8 is a paper cutter.

When the steel sheet 3 is supplied, tension is generated between the steel sheet 3 and the reel 2 by the exit-side bright roll 9, and the steel sheet 3 is supplied.
To prevent "slack". 10 is a delivery pinch roll, 1
Reference numeral 1 denotes an output shear, 12 denotes an output deflector roll, 13 denotes an output sliding table, and 14 denotes a belt wrapper.

[0005]

In the conventional apparatus, it is necessary to supply the paper 4 without causing the paper to "wrinkle" and not causing "paper breakage" upon insertion. For this reason, in paper supply, it is necessary to apply tension immediately after the paper bites between the steel sheets in a state where the tension of the steel sheet 3 is established.

For this reason, the supply of the paper 4 is started by winding the steel plate 3 around the reel 2 to some extent, and after the tension is applied to the steel plate 3, the insertion of the paper 4 is started when the establishment of the tension of the reel 2 is detected. Immediately after that, the motor 7 is controlled to generate a driving force in the reverse direction.

[0007] In the winding of a thin steel plate, it is ideal that paper can be inserted at the position where the steel plates start to overlap in order to improve the yield of the product quality of the steel coil wound on the reel.

However, as described above, in the conventional method, paper is supplied after tension is applied to the steel sheet after winding the steel sheet to some extent on the reel. However, when the coil is rewound, the head portion becomes scrap when the coil is rewound, which lowers the product yield.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a thin steel sheet winding device capable of inserting paper at a position where the steel sheets start to overlap with each other and without causing wrinkles.

[0010]

According to the present invention, a time T until a steel sheet is wound around a reel one turn at the start of the conveyance of the steel sheet is set.
1 and a time T2 required for the paper leading end to reach the winding position of the steel sheet at the start of the paper conveyance, is calculated, and the difference (T
By activating the paper unwinder at the timing determined by 1-T2), paper can be inserted at the position where the steel sheets start to overlap, and is characterized by the following configuration.

A thin steel sheet conveyed at a line speed is wound on a motor-driven reel with tension, and in parallel with the winding, a paper is supplied from a motor-driven paper unwinder between layers of the steel sheet under tension. In the thin steel plate winding device, a time T1 until the tip of the steel plate is wound around the reel by one turn at the start of operation of the motor driving the reel is calculated, and the operation of the motor driving the paper unwinder is started. A time T2 until the leading end of the paper reaches the winding position of the steel sheet for one turn is calculated, and after a time corresponding to the difference between the times T1 and T2 from the operation start timing of the motor driving the reel, the paper unwinder is obtained. And control means for starting a motor for driving the motor.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of a control device for a thin steel sheet winding device according to an embodiment of the present invention.

The paper unwinder motor 7 is a variable speed device 21 which is a power converter such as a stationary inverter.
The speed is controlled by a speed control system. This speed control system uses a line speed (steel sheet conveyance speed) set value as a target value, a pulse pickup 22 coupled to the motor 7 (or coupled to the guide roll 6), a time function generator 23, a speed control amplifier 24, and a current control. The current of the variable speed device 21 is controlled by the amplifier 25,
The output of the device 21 accelerates the motor 7 to a constant speed and performs constant speed control.

The time function generator 23 takes in the line speed set value at the timing when the timing switch 26 is turned on, generates a soft start signal which rises to the line speed set value at a constant inclination, for example, and generates a speed control amplifier 24.
Speed command. Conversely, when the switch 26 is opened, the time function generator 23 generates a soft stop signal that drops to zero speed at a constant inclination, and gradually reduces the speed command.

The speed control amplifier 24 includes the time function generator 2
3, a speed command ΔN ₂ for generating tension on the paper is subtracted from the speed command to obtain a speed command, and a deviation from a speed feedback signal from the pulse pickup 22 is calculated by proportional integration (PI). The calculation result is used as a current command of the current control amplifier 25.

The current control amplifier 25 is a speed control amplifier 2
In response to the current command from the control unit 4, the current output detected from the output of the variable speed device 21 and the like is used as a current feedback signal, and a control signal for the variable speed device 21 is generated by a proportional integral calculation.

Similarly to the above-described speed control system, the speed of the tension reel motor 1 is controlled by a speed control device 27. The speed control is started at the timing when the timing switch 28 is turned on, the speed command is gradually increased according to the soft start signal, the speed control amplifier performs feedback control by the pulse pickup 29, and the current control amplifier performs current feedback control. Done. At this time, the speed command of the speed control amplifier causes the speed of the motor 1 to be slightly higher than the line speed set value by ΔN ₁ to generate tension in the steel plate 3.

Here, the timing switches 26 and 28
Is the drive start timing of the motors 7 and 1. In the present embodiment, by making this timing appropriate, the leading end of the paper 4 can be inserted at the position where the steel sheets start to overlap. This timing control will be described in detail below.

First, before the steel sheet 3 is wound on the reel 2 (at the end of the previous winding control), the steel sheet 3 is at a position where the leading end of the steel sheet 3 is cut by the output shear 11. On the other hand, the leading end of the paper 4 is at a position cut by the paper cutter 8.

From this state, winding of the steel plate 3 is started.
At this start, the switch 28 is turned on by an operation button input, and the driving of the reel 2 is started. At the same time, the leading end of the steel plate 3 starts to be conveyed from the position of the output shear 11 at the line speed.

Thereafter, the timing is measured and the switch 26
Turn on. Accordingly, the on-timing of the switch 26 is automatically adjusted so that the steel plate 3 starts to be wound on the reel 2 and the leading end of the paper 4 is inserted at the timing when the leading end of the steel plate 1 makes one rotation and starts to overlap. .

This timing adjustment is as shown in FIG. 2. If the reel 2 is started at time t ₁ and the time t ₃ is the timing at which the tip of the steel plate 3 starts to overlap on the reel 2,
The area of the hatched portion corresponds to the steel plate transport distance. This time t
_In order to transport the leading end of the paper 4 to the position where the steel sheet starts to overlap in ₃ , the paper unwinder 5 is started at the timing of time t _2. from becoming the carrying distance to, it is possible to obtain the time t ₂ in advance in the operation.

FIG. 3 shows a processing flow for turning on the switch 26 at time t ₂ . To turn on the switch 28 at the start command winding steel (S1), the steel plate front end from time t ₁ is determined by calculating the time T1 until time t ₃ when the start overlap on the reel 2 (S2). This time T1 is obtained from the following equation.

[0024]

(Equation 1)

Here, V: line speed (m / s) α1: acceleration of line speed (m / s ² ) L1: distance (m) from the position of the steel plate 11 on the exit side shear to winding on the reel 2 for one turn Next to determine the time T2 from the time t ₂ which is turned on the switch 26 until time t ₃ paper tip begins overlap of the steel sheet in operation (S3). This time T2 is obtained from the following equation.

[0026]

(Equation 2)

Where α2 is the acceleration of the paper unwinder (m / s ² ), which corresponds to the inclination of the time function generator 23. L2 is the distance (m) between the paper 8 and the winding position of the reel 2 (m). And T2, and waits for the elapse of time equal to the difference (T1-T2) since the switch 28 was turned on (S4). This time, become a timing of time t ₂ in FIG. 2, the switch 26 is turned on at this timing to start the paper unwinder.

Thus, at time t ₃ in FIG. 2, the steel plate 3 is wound around the reel 2 for one turn, and the leading end of the paper 4 is wound at a position where the leading end of the steel plate 3 starts to overlap. Thereafter, as in the case of the conventional control, a steady steel sheet is set by establishing the paper insertion tension (S6), shifting the tension control of the paper unwinder (S7), establishing the reel tension (S8) and shifting the reel tension control (S9). A winding operation is performed.

[0029]

As described above, according to the present invention, the time T1 until the steel sheet is wound around the reel by one turn at the start of the conveyance of the steel sheet, and the time T2 until the tip of the paper reaches the winding position of the steel sheet at the start of the paper conveyance. Is calculated, and the paper unwinder is started at the timing determined by the difference (T1−T2). Therefore, the paper can be inserted at the position where the steel sheets start to overlap without generating “wrinkles” on the paper, and the product quality can be reduced. The product yield can be improved without lowering.

[Brief description of the drawings]

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

FIG. 2 is a time chart of the embodiment.

FIG. 3 is a control processing flow of the embodiment.

FIG. 4 is a mechanism diagram of a thin steel plate winding device.

[Explanation of symbols]

 1, 7: motor 2: thin steel plate take-up reel 3: thin steel plate 4: paper 5, paper unwinder 21: variable speed device 23: time function generator 24: speed control amplifier 25: current control amplifier 26, 28: switch 27 Speed control device

Claims (1)

[Claims] 1. A thin steel sheet conveyed at a line speed is wound on a motor-driven reel with tension, and in parallel with the winding, a paper is applied from a motor-driven paper unwinder to a layer between the layers of the steel sheet. In the thin steel sheet take-up device to be supplied, a time T1 until the leading end of the steel sheet is wound around the reel by one turn when the motor for driving the reel is started.
And calculating a time T2 until the leading end of the paper reaches the one-turn winding position of the steel plate at the start of operation of the motor driving the paper unwinder,
A sheet-rolling device, comprising: control means for activating a motor for driving the paper unwinder after a time corresponding to a difference between the times T1 and T2 from an operation start timing of the motor for driving the reel.