JPH01186207A - Rolling apparatus for sheet stock - Google Patents

Abstract

PURPOSE:To realize the sheet rolling apparatus excellent in conformity and stability by detecting the tension between stands to transmit to an elongation percentage control device through a speed limit detecting circuit by feeding a correcting output to a tension control device from here. CONSTITUTION:The speeds of inlet and outlet sides of the plate material 1 are detected by the speed detecting devices 9, 10, based on this detected value, the inlet side speed is corrected by the elongation percentage control device 13 to make the elongation percentage obtained by an elongation percentage detecting device 11 to be a setting value. Further, the inlet side speed correction is limited to make the interstand tension detected by the tension detector 8 not to be exceeded the setting value by the tension limit control circuit 16. Furthermore, the tensions of the inlet and outlet side tension rolls 3, 6 are limited by the tension control devices 21, 24 respectively. On the sheet stock rolling mill, the output of the tension limit control circuit 16 is transmitted to the elongation percentage control device 13 through the speed limit detecting circuit 14. At this time, when the interstand tension is limited in the said prescribed setting value, the correcting output is fed to the tension control devices 21, 24 from this elongation percentage control device 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a temper bath plate rolling apparatus that is equipped with an elongation rate control device and improves the flatness of a plate through elongation.

(Prior Art) FIG. 3 shows a block configuration of a rolling device having an elongation rate control device as an example of a conventional temper pass rolling device. In the figure, a plate material 1 is rewound by an unwinding machine 2 driven by a tension-controlled drive device (not shown), including an entry tension roll 3, an entry stand 4, and an exit stand 5.
It is then wound up by a winding machine 7 driven by a tension-controlled drive device (not shown) via an exit tension roll 6. The entry tension roll 3 is controlled by an entry tension roll tension control device 21 and driven via a drive device 25 so that the tension setting value is set by the entry tension roll tension setting device 17.

Similarly, the exit tension roll 6 is also driven by the tension control device 24 and the drive device 28 so as to reach the set value set by the exit tension roll tension setter 18.

Further, the speeds of the entrance stand 4 and the exit stand 5 are each controlled by a speed control device 22, a drive device 26, a speed control device 23, and a drive device 27, respectively. The control commands given to the speed control devices 22 and 23 are configured to obtain the set value determined by the speed setter 20 via the speed reference calculation circuit 19.

Inlet tension roll 3 and outlet tension roll 6
The speeds of are detected by speed detection devices 9 and 10, respectively, and input to an elongation rate detection device 11. The elongation rate detection device 11 detects the elongation rate of the plate material 1 based on these inlet speed and outlet speed, and inputs this to the elongation amount control device 13.

The elongation amount control device 13 controls the elongation rate by correcting the speed of the entrance stand 4 based on the setting value set by the elongation weight setting device 12 and the actual elongation rate output from the elongation rate detection device 11. conduct.

In addition, the tension between the stands is detected by a tension detection device 8,
A tension limit control circuit 16 limits the entry speed correction of the entry stand 4 so that the inter-stand tension does not exceed a preset value set by the tension setting device 15. When the tension between the stands exceeds a set value, the tension setters 17 and 18 are manually changed to change the tension of the inlet tension roll 3 and the outlet tension roll 6.

(Problem to be Solved by the Invention) In this way, in the conventional plate rolling equipment, when the speed of the input stand is limited by the tension limit control circuit, the tension between the input side tension roll and the output side tension roll can be manually controlled. Since the smallness rate was corrected by changing the ratio, there were problems with the coordination and stability of the control.

The present invention has been made to solve the above-mentioned problems, and even when the speed of the entrance stand is limited by the tension limit control circuit, it is possible to continue controlling the elongation rate without human intervention, thereby improving coordination. The purpose of the present invention is to provide a plate rolling machine with excellent stability.

[Structure of the invention]

(Means for Solving the Problems) The plate material rolling apparatus according to the present invention corrects the input side speed so that the elongation rate of the plate material becomes a first set value based on the input side speed and exit side speed of the plate material. a tension limit control circuit that limits the entry speed correction so that the inter-stand tension does not exceed a second set value; and a tension control circuit that controls the tension of the entry tension roll and the exit tension roll. a plate rolling apparatus comprising: a speed at which the tension limit control circuit detects whether or not the inter-stand tension is controlled to the second set value, and transmits the detection result to the elongation amount control device; elongation of the plate material, comprising: a limit detection circuit; and means for supplying a correction output from the elongation amount control device to the tension control device when the inter-stand tension is limited to the second set value. The rate is controlled.

(Function) In the present invention, when the speed of the entry stand is limited by the tension limit control circuit and the elongation rate correction is not properly reflected in the entry stand speed, the speed limit detection circuit detects this and Correct by means other than stand speed.

When this elongation rate control amount to be corrected is notified to the elongation amount control device, the elongation amount control device outputs a correction amount to the tension of the input side tension roll and the tension of the output side tension roll based on the correction amount, thereby increasing the elongation rate. Continue control.

(Example) Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a plate rolling apparatus according to an embodiment of the present invention. Note that the same parts as those in the apparatus shown in FIG. 3 are given the same reference numerals, and detailed explanation thereof will be omitted.

In the present invention, a speed limit detection circuit 14 is provided for detecting that the output of elongation rate control is limited, and the output of this speed limit detection circuit 14 is used as the output of the elongation weight setting device 12 and the output of the elongation rate detection device 11. It is input to the elongation rate control device 13 along with the output. The elongation rate control device 13 is configured to supply the correction output to the tension control devices 21 and 24 when the inter-stand tension is limited to a predetermined value.

The input of the speed limit detection circuit 14 is the tension limit control circuit 1.
By comparing these two signals, it is determined whether or not the tension limit is functioning, and this is transmitted to the elongation rate control device 13.

FIG. 2 is a time chart for explaining the operation of the apparatus shown in FIG. At time 10, the elongation rate detection value is smaller than the elongation rate setting value, so the elongation rate control device 13
Control is performed to reduce the speed of the entrance stand 4.

At time t1, the speed of the entrance stand 4 reaches the lower limit, and the elongation rate cannot be controlled by the speed of the entrance stand. This is detected by the tension detection device 8 and the tension limit control circuit 6, and the speed limit detection circuit 14 is activated.

The speed limit detection circuit 14 calculates the elongation rate control amount to be corrected by means other than the speed of the entrance stand 4, and notifies the elongation rate control device 13 of this.

The elongation rate control device 13 outputs correction outputs for correcting the tension of the input side tension roll 3 and the tension of the output side tension roll 6 to the tension control devices 21 and 24, respectively, based on the correction amount.

As shown in Fig. 2, the tension of the inlet tension roll and the outlet tension roll gradually increases from time t1, and when the elongation rate detection value matches the elongation rate setting value at time t2, the elongation rate control output at that time increases. held in value.

In this way, even if the speed of the entry stand is set to the lower limit by the operation of the tension limit control circuit, the elongation rate control can be continued by correcting the tension between the entry tension roll and the exit tension roll. .

〔Effect of the invention〕

As described above in detail based on the embodiments, in the present invention, the output of the elongation rate control is distributed between the speed of the stand, the tension of the inlet tension roll, and the tension of the outlet tension roll. Even when the speed is limited, elongation rate control can be continuously performed, and a plate rolling machine with excellent coordination and stability can be realized.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure is a time chart explaining the operation of the device shown in FIG. 1, and FIG. 3 is a block diagram of the conventional device. 1...Plate material, 3...Entrance side tension roll, 4...
・Entry side stand, 5... Output side stand, 6... Output side tension roll, 8... Tension detection device, 9, 1o.
... Speed detection device, 11... Elongation rate detection device, 13.
...Elongation rate control device, 14...Speed limit detection circuit, 1
5... Tension setting device, 16... Tension limit control circuit, 17... Entrance side tension roll tension setting device, 18.
...Output tension roll tension setting device, 19.. Speed reference calculation circuit, 20.. Speed setting device, 21.. Input tension roll tension control device, 22.. Input side filter tandem speed control device. , 23... Output side stand speed control device, 24... Output side tension roll tension control device, 25
... Entrance side tension roll drive device, 26... Entrance side stand drive device, 27... Output side stand drive device,
28...Outside tension roll drive device. Applicant's agent Mr. Sato

Claims (1)

[Scope of Claims] An elongation rate control device that corrects the input side speed so that the elongation rate of the plate material becomes a first set value based on the input side speed and exit side speed of the plate material; In the plate rolling apparatus, comprising: a tension limit control circuit that limits the input speed correction so as not to exceed a second set value; and a tension control device that controls the tension of an input tension roll and an output tension roll; a speed limit detection circuit that detects whether or not the inter-stand tension is controlled to the second set value by the tension limit control circuit and transmits the detection result to the elongation rate control device; and means for supplying a correction output from the elongation rate control device to the tension control device when the elongation rate is limited to a second set value, thereby controlling the elongation rate of the plate material. Device.