JPS6358043B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stacked plate rolling machine for stacking two or more strips and rolling them simultaneously.

In recent years, there has been an increasing demand for energy saving and resource saving in rolling mills as well. As a means to achieve this objective, stack rolling, in which a plurality of strips are stacked and rolled, has conventionally been carried out.
According to this, multiple rolled products can be produced in one rolling process, which not only improves productivity and saves energy, but also prevents rapid thickness reduction at the edge of the plate (edge drop).
There is also the advantage that it reduces. Furthermore, since it is possible to produce ultra-thin products that cannot be obtained by normal rolling, stacked plate rolling is exclusively used to produce aluminum foil.

On the other hand, such conventional stacked plate rolling has the following drawbacks. That is, after the strips were rolled in a stacked manner, they were wound onto a take-up reel while being stacked. For this reason, a process for peeling off the stacked strips one by one after rolling was required, and productivity could not be improved as expected. Furthermore, regarding strip thickness control, since the strips are rolled up while being overlapped, even though it is possible to control the total thickness of the stacked strips, it is impossible to independently control the thickness of each strip.

The present invention has been made in view of the above points, and its purpose is, of course, to make it possible to control the thickness of each strip even when multiple strips are stacked and rolled at the same time. The object of the present invention is to provide a stacked plate rolling machine capable of rolling plates with high accuracy in plate thickness.

The present invention provides a measuring device that independently measures the thickness of each strip, a comparator that compares the thickness measured by the measuring device with a preset target thickness and generates an error signal, and a A strip thickness control device that operates at least one of the unwinding and take-up reels based on an error signal and controls the tension of each strip so that the strip thickness error is zero. A plate rolling machine or a plate thickness control device that controls the plate thickness for each strip;
By providing a stacked plate rolling mill that is equipped with a device that calculates the influence that a change in tension in one stacked strip has on a change in thickness of the other strip, and compensates for this based on the output of the calculation result. , which was designed to achieve the intended purpose.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 1 shows an embodiment of the stacked plate rolling machine of the present invention.

As shown in the figure, the rolled materials 1 and 2 that are rolled one on top of the other are unwound from unwinding reels 7 and 9, overlapped, and passed through a rolling mill. The rolled materials 1 and 2 passed through the rolling mill are rolled by work rolls 4 and 5 supported by reinforcing rolls 3 and 6, and wound onto take-up reels 8 and 10, respectively. Note that 11, 12, 13, and 14 are deflorers. Plate thickness gauges 15 and 16 are installed on the exit side of the rolling mill, and the plate thicknesses of the rolled materials 1 and 2 rolled by the rolling mill are independently measured by the plate thickness gauges 15 and 16. The respective plate thickness gauges 15 and 16 are installed at positions approximately equidistant from the rolling mill in order to make the measurement delay time the same. The plate thicknesses h ₁ and h ₂ measured by the plate thickness gauges 15 and 16 are sent to comparators 17 and 18, where they are compared with target plate thicknesses h _e1 and h _e2 preset by a setting board 19, Outputs are produced according to the respective plate thickness errors Δh ₁ and Δh ₂ . These error signals are sent to the control devices 20, 21 of the take-up reel motors 22, 23, and the control devices 20, 21
The tension of the rolled materials 1 and 2 is controlled by the take-up reel motors 22 and 23 so that the plate thickness errors are respectively zero.

By doing so, it becomes possible to control the thickness of each rolled material 1, 2.

Next, another embodiment of the present invention will be described with reference to FIG. In the example shown in the figure, the plate thickness of each rolled material 1 and 2 is
h ₁ , h ₂ , and the respective target plate thicknesses h _e1 and h _e2 using the computer 2.
8, plate thickness is controlled by controlling not only the tension on the exit side of the rolling mill but also the tension on the entrance side.
That is, control devices 24 and 25 are installed on the input side of the rolling mill to control the unwinding reel motors 26 and 27 based on the calculation results of a computer 28, so that changes in the tension of one of the stacked rolled materials are reflected in the other. The computer 29 calculates the effect on the thickness change of the rolled material, sends the output based on the calculation result to the control devices 24 and 25, and the control devices 24 and 25 cause the unwinding reel motors 26 and 27 to control the thickness change. The tension of the inlet rolled material is controlled to compensate for the effect of calculator 2
An example of what is done in step 8 is shown in FIG. The process is the same as the example shown in FIG. 1 until the error signals Δh ₁ and Δh ₂ in the comparators 17 and 18 are obtained. Once the error signals Δh ₁ and Δh ₂ are determined, the arithmetic unit 29 in the calculator 28 calculates the respective rolling material tension changes Δt ₁ and Δt ₂ such that the respective error signals are O.
Here, Δt ₁ and Δt ₂ are the average values of the inlet and outlet tensions, and Δt ₁ = (1-1/α) Δt _b1 + 1/α Δt _f1 ...(1) Δt ₂ = (1-1/α) It can be written as Δt _b2 +1/αΔt _f2 ……(2). The method for calculating Δt ₁ and Δt ₂ will be explained below.
Figure 4 shows the results when the tension of one rolled material is changed.
The variation in thickness of each rolled material is shown. From this, the plate thickness variation of each rolled material can be written as Δh ₁ =a・Δt ₁ +b・Δt ₂ ...(3) Δh ₂ =a・Δt ₂ +b・Δt ₁ ...(4) (a, b is a constant). Therefore, it is sufficient to substitute the plate pressure error amounts Δh ₁ and Δh ₂ to be corrected into equations (3) and (4) and solve for Δt ₁ and Δt ₂ . Since equations (3) and (4) are simultaneous linear equations, they can be easily solved. Once the tensions Δt ₁ and Δt ₂ to be changed are determined, the calculation units 30 and 3
1, the inlet and outlet tensions Δt _f1 , according to equations (1) and (2),
Calculate Δt _b1 , Δt _f2 , and Δt _b2 . α=2 in equations (1) and (2)
Then, Δt _f1 = Δt _b1 = 1/2・Δt ₁ ...(5) Δt _f2 = Δt _b2 = 1/2・Δt ₂ ...(6).

In this way, it is not only possible to control the thickness of each rolling mill, but it is also possible to take into account the effect that changes in tension in one of the stacked rolled materials will have on changes in the thickness of the other rolled material. Highly accurate plate thickness control is possible.

Although the case where two rolled materials are piled up has been described here, it goes without saying that the same applies even when the number of rolled materials increases.

According to the stacked plate rolling machine of the present invention explained above,
a measuring device that independently measures the thickness of each strip; a comparator that compares the thickness measured by the measuring device with a preset target thickness and generates an error signal;
A control device for controlling the tension of each strip by operating at least one of the unwinding reel or the take-up reel based on the error signal from the comparator, and controlling the tension of each strip so that the thickness error becomes zero. A stacked plate rolling mill equipped with a device or a plate thickness control device that controls the plate thickness for each strip and calculates the effect that changes in tension in one stacked strip have on changes in thickness of the other strip. Since it is a stacked plate rolling machine equipped with a device that compensates for this based on the output from the calculation result,
Even when multiple strips are stacked and rolled at the same time, it is possible to control the thickness of each strip, and it is also possible to roll with high thickness accuracy, which is extremely important for this type of stacked strip rolling machine. It is effective for

[Brief explanation of drawings]

Fig. 1 is a diagram showing an embodiment of the stacked plate rolling machine of the present invention equipped with a plate thickness control device, Fig. 2 is a diagram showing another embodiment of the invention, and Fig. 3 is shown in Fig. 2. FIG. 4 is a diagram showing the process of calculating the control amount by a computer, and is a diagram showing the effect of a change in tension in one strip on a change in thickness of the other strip. 1, 2...rolled material, 3,6...reinforcement roll,
4, 5... Work roll, 7, 9... Unwinding reel, 8, 10... Winding reel, 15, 16...
... Plate thickness gauge, 17, 18 ... Comparator, 19 ... Setting board, 20, 21 ... Take-up reel motor control device, 22, 23 ... Take-up reel motor, 24, 25 ... Winding A control device for a motor for a feed reel, 26, 27... a motor for a feed reel, 28... a computer, 29, 30, 31... an arithmetic unit.

Claims (1)

[Claims] 1. A plurality of strips are overlapped and rolled at the same time, and a dedicated unwinding reel is provided for each strip;
In a stacked plate rolling mill equipped with a take-up reel and a measuring device that independently measures the thickness of each strip, the measured plate thickness by the measuring device is compared with a preset target thickness and an error signal is generated. A control device that operates at least one of the unwinding reel or the take-up reel based on the error signal from the comparator and the error signal from the comparator, and controls the tension of each strip so that the sheet thickness error becomes zero. 1. A stacked plate rolling mill comprising a plate thickness control device comprising: a plate thickness control device which controls the plate thickness for each strip. 2 Multiple strips are stacked and rolled at the same time, and each strip has its own unwinding reel,
and a stacked plate rolling mill equipped with a take-up reel, a plate thickness control device for controlling the plate thickness for each strip, and the effect that a change in tension in one stacked strip has on a change in thickness in the other strip. and a device for compensating for the calculation based on the output of the calculation result.