JP3364086B2 - Rolled material tension control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical loss of the winding device when tension is applied to the rolling material by controlling the winding speed of the winding material for winding the rolled material that has passed through the rolling mill. The present invention relates to a device for controlling the tension of the rolled material by performing compensation control for the electric motor according to the speed after the electric motor for the winding device has been started in order to compensate the amount.

[0002]

2. Description of the Related Art As a conventional device of this type, Japanese Patent Laid-Open No.
The one described in Japanese Patent Publication No. 0-046451 is known.
This device compensates for mechanical loss caused by friction of a bearing of the winding device when the rolled material that has passed through the rolling mill is wound by the winding device and tension is applied to the rolled material, so that the tension is controlled. Compensation control is performed on the electric motor of the winding device in order to keep it constant.

Specifically, such compensation control is intended for the dynamic loss after the start-up of the winding device. In this case, the higher the winding speed of the winding device, the larger the dynamic loss. When is high, the compensation amount (for example, the correction amount of the current command value for the electric motor) is increased, and when it is low, the compensation amount is decreased.

[0004]

However, in the conventional tension control device for rolled material, the compensation control for the electric motor of the winding device is intended for dynamic loss, so that the stainless steel foil (having a thickness of 0.1 mm or less) is used. ), Etc., when winding a rolled material with an extremely low tension, the tension of the rolled material increases at the entrance side of the rolling mill due to the failure of the winding device when the rolling mill starts up, causing the breakage. is there.

That is, although there are thick and thin rolled materials, the tension per unit area does not change between the thick material and the thin material, whereas the total tension is lower in the thin material. Regarding the mechanical loss of the winding device, the dynamic loss and the static loss are almost equal immediately after the inching, but the static loss becomes about 5 times the dynamic loss about 10 minutes after the winding device is stopped. .

Therefore, in the case of an extremely thin rolled material having a low total tension such as stainless steel foil, the torque required when viewed from the drive shaft of the electric motor of the winding device is static loss rather than tension applied. As a result, only the rolling mill is operated at the start of rolling, which increases the tension of the rolled material on the entrance side of the rolling mill and breaks the rolled material.

The present invention has been made in order to eliminate such inconvenience, and it is possible to satisfactorily prevent the rolled material of the ultra-thin material from breaking at the start of rolling, and to achieve a wide range of plate thickness from the ultra-thin material to the thick material. It is an object of the present invention to provide a tension control device for rolled material capable of stably rolling the rolled material.

[0008]

In order to achieve the above object, a tension control device for a rolled material according to a first aspect of the invention controls a winding speed of a winding device for winding a rolled material that has passed through a rolling mill. In order to compensate for the mechanical loss of the winding device when tension is applied to the rolled material by rolling the rolling material, the rolling control is performed by performing compensation control for the electric motor according to the speed after the motor for the winding device is started. In a device for controlling the tension of a material, a speed command signal is output to a motor for a rolling mill, and the motor for a rolling mill is activated based on the speed command signal.
Motion, and at the same time as the judgment, the winding operation is performed according to the judgment.
Start the initial compensation control for the device motor, and
The amortization control electric motor is characterized by comprising an initial compensation control means continues for a predetermined time to start.

The tension control device for rolled material according to claim 2 is
An electric motor for a winding device for compensating for mechanical loss of the winding device when tension is applied to the rolling material by controlling the winding speed of the winding device for winding the rolled material that has passed through the rolling mill. In the device for controlling the tension of the rolled material by performing compensation control for the electric motor according to the speed after the start of
First speed detecting means for detecting the speed of the electric motor for the rolling mill, second speed detecting means for detecting the speed of the electric motor for the winding device, and the first speed detecting means based on the detection signal by the first speed detecting means. Judging the start of the electric motor for rolling mill ,
At the same time, the initial compensation control for the electric motor for the winding device is started before the electric motor for the winding device is started according to the determination , and the electric motor for the winding device is started based on the detection signal from the second speed detecting means. And an initial compensation control means for terminating the initial compensation control for the electric motor according to the determination.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory schematic diagram for explaining a tension control device for rolled material which is an example of an embodiment of the present invention, and FIG. 2 is a time chart diagram for explaining the operation of the device. In this embodiment, as a rolled material, a stainless steel foil having a thickness of 30 μm is taken as an example.

In FIG. 1, reference numeral 1 is a mill (rolling machine) for performing forward and reverse rolling of a rolled material 2 and 3c is an electric motor for mill (electric motor for rolling machine) which drives the mill 1 through a speed reducer 4c.
Reference numerals a and 5b are respectively arranged at the front and rear of the mill 1 to wind the rolled material 2 passing through the mill 1 in the forward and reverse directions into a coil shape, and 5c and 5d are mills 1 and 5a and 5b. The deflector rolls 3a and 3b interposed between the motor and the winding motor 5a and 5b drive the winding device 5a and 5b through the speed reducers 4a and 4b, 7c is a drive power source for the mill motor 3c,
7a and 7b are drive power sources for the winding device electric motors 3a and 3b,
8c is a speed sensor (first speed detecting means) for detecting the speed of the electric motor 3c for mill, 8a and 8b are speed sensors (second speed detecting means) for detecting the speed of the electric motors 3a, 3b for winding device, Reference numeral 9 is a controller including a control device (initial compensation control means) 10 for controlling the electric motors 3a, 3b, 3c according to the detection signals of the speed sensors 8a, 8b, 8c.

The winding devices 5a and 5b also serve as a rewinding device for the rolled material 2. In the drawing, the winding device 5a operates as a rewinding device during rolling in the direction of arrow A, and conversely arrow B
During rolling in the direction, the winding device 5b operates as a rewinding device.

Next, the operation of the control device 10 will be described. When the rolled material 2 is an extremely thin stainless steel foil as in this embodiment, the winding devices 5a and 5b and the speed reducer 4 are used.
The static mechanical loss torques of a and 4b are much larger than the torque (tension applied amount) required when rolling the rolled material 2. Therefore, in this state, when the controller 9 outputs a speed command to the electric motor 3c for the mill and the electric motors 3a and 3b for the winding device to start rolling, the mill 1 is started at the start.
And the winding devices 5a and 5b do not rotate, and as a result, the tension of the rolled material 2 increases at the entrance side of the mill 1 and the rolled material 2 breaks.

Therefore, in this embodiment, the control device 1
0 performs initial compensation control on the electric motors 3a, 3b of the winding devices 5a, 5b according to the static mechanical loss of the winding devices 5a, 5b.

That is, when the speed sensor 8c detects that the mill electric motor 3c has started operating, the control device 10 judges "actual mill speed> 0 (start of mill)" based on the detection signal, and Simultaneously with the judgment, an initial compensation current command signal corresponding to a preset initial compensation amount is output to the winding device drive power supplies 7a and 7b to perform stepwise initial compensation (see FIG. 2).

As a result, the start-up timing of the mill 1 and the start-up timing of the winding devices 5a and 5b can be made substantially coincident with each other, and the breakage of the rolled material 2 that occurs at the start of the mill operation can be eliminated. Here, the initial compensation amount is obtained by an experiment and is 80 to 120 which is the maximum measured value of the static mechanical loss.
%.

When the speed sensors 8a and 8b detect that the winding devices 5a and 5b have started to operate, the control device 10 determines that "winding device speed performance>0" based on the detection signal.
(Activation of the winding device) "and the initial compensation control is terminated at the same time.

As a result, over-compensation (over-rotation) of the winding devices 5a and 5b is achieved even when the static mechanical loss is changed to the dynamic mechanical loss due to the activation of the winding devices 5a and 5b and the mechanical loss is greatly reduced. As a result, the winding device 5a,
It is possible to prevent breakage due to over tension of the rolled material 2 (winding side) or breakage due to slack of the rolled material 2 (occurrence on the rewinding side) immediately after the start of 5b.

After the completion of the initial compensation control for the static losses of the winding devices 5a, 5b (after the start of the winding devices 5a, 5b), the control shifts to the compensation control for the dynamic losses, In this case, the controller 9 proportionally controls the compensation amount for the dynamic loss according to the detection signals (winding speed) from the speed sensors 8a and 8b. That is, when the winding speed of the winding devices 5a and 5b is high, the dynamic loss is large, so that the compensation amount is large, and when the winding speed is low, the dynamic loss is small and the compensation amount is small.

As described above, according to this embodiment, when the rolled material 2 is an extremely thin material such as stainless steel foil, the mill 1
The start-up timing of the winding device 5a, 5b can be made substantially the same so that breakage of the rolled material 2 due to non-rotation of the winding device 5a, 5b at the time of starting the mill 1 can be eliminated and the winding device 5a, 5b. Since breakage of the rolled material 2 due to overcompensation after starting can be eliminated, rolling of a rolled material having a wide range of thickness from an extremely thin material to a thick material can be stably performed.

In the above embodiment, the case where the initial compensation control is performed based on the actual speed of the mill 1 and the winding devices 5a and 5b has been described as an example.
If the processing speed is slow, the initial compensation control for the winding device motors 3a and 3b is started based on the speed command signal output from the controller 9 to the mill motor 3c until the motors 3a and 3b are activated. You may make it continue for a predetermined time.

That is, the control start timing of the initial compensation is
After the mill speed command is output from the controller 9, T₁sec (T
₁Is 0.1 to 1 sec) or mill speed command (target speed)
X ₁% Or more (x₁Is 0.05 to 0.2), and the control end
End timing is the initial compensation time T₂sec (T₂Is 1-3
sec) may be later.

[0023]

As is apparent from the above description, according to the present invention, when the rolled material is an ultrathin material such as foil, the starting timing of the rolling mill and the winding device are almost the same, and Since it is possible to eliminate the breakage of the rolled material due to the non-rotation of the winding device at the time of start-up and the breakage of the rolled material due to overcompensation after the start-up of the winding device, it is possible to cover a wide range from ultra-thin to thick The effect that the rolled material having a plate thickness can be rolled stably can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory schematic diagram for explaining a tension control device for rolled material, which is an example of an embodiment of the present invention.

FIG. 2 is a time chart diagram for explaining the operation of the apparatus.

[Explanation of symbols]

1 ... Mill (rolling machine) 2… Rolled material 3c ... Electric motor for mill (electric motor for rolling mill) 3a, 3b ... Electric motor for winding device 5a, 5b ... Winding device 8c ... Speed sensor (first speed detecting means) 8a, 8b ... Speed sensor (second speed detecting means) 9 ... Controller 10 ... Control device (initial compensation control means)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-50-46541 (JP, A) JP-A-57-72549 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21C 47/00

Claims (2)

(57) [Claims] 1. When a tension is applied to the rolled material by controlling the winding speed of a winding device that winds the rolled material that has passed through a rolling mill, the mechanical loss of the winding device is compensated for. In the device for controlling the tension of the rolled material by performing the compensation control for the electric motor for the winding device according to the speed after the electric motor is started, while outputting the speed command signal to the electric motor for the rolling device, The rolling mill power source activated based on a speed command signal
Determine the motivation to start, and at the same time, in response to the determination
Start the initial compensation control for the winding device motor,
Tension controller of the rolled material to the initial compensation control electric motor is characterized by comprising an initial compensation control means continues for a predetermined time to start. 2. When the tension is applied to the rolled material by controlling the winding speed of the winding device that winds the rolled material that has passed through the rolling mill, the mechanical loss of the winding device is compensated for. In a device for controlling the tension of the rolled material by performing compensation control for the electric motor according to the speed after starting the electric motor for the winding device, a first speed detecting means for detecting the speed of the electric motor for the rolling mill, A second speed detecting means for detecting the speed of the electric motor for the winding device; and a start signal of the rolling mill electric motor based on a detection signal from the first speed detecting means.
At the same time, the initial compensation control for the electric motor for the winding device is started before the electric motor for the winding device is started according to the determination , and the electric motor for the winding device is started based on the detection signal from the second speed detecting means. And an initial compensation control means for terminating the initial compensation control for the electric motor according to the determination.