JPS5969337A - Catenary control device - Google Patents

Abstract

PURPOSE:To improve the accuracy of catenary control, by setting a deviation between the detected value of a catenary detector and the setting value down to a tension compensation value, and making it so as to perform the tension control via a blind sector element, in case of a catenary control device for a steel process line. CONSTITUTION:The tension detected by a tension detector 15 is compared with the setting tension of a setter 6 and controlled by a tension control part 7 so as to make both tension values accordable. At this time, the catenary of a steel plate 2 is detected by a catenary detector 16, compared with the setting catenary 17, and if there produces a more deviation than a blind sector being prescribed by a blind sector element 18, the tension control part 7 is compensated via an integrating element 19. With this constitution, a twist in the steel plate 2 will in no case give an adverse effect on a main feedback loop B at all and the tension compensation takes place with a deviation to the specified catenary via a sub-feedback loop C, thus the accuracy of catenary control can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention-2 relates to a catenary control device in a steel process line.

In a steel floss line, it is necessary to keep the catenary (sag of the steel plate) constant, and in particular, as shown in Figure 1y'1, 1. If there is an obstacle 1, its importance is very large.

However, with the conventional technology, the case K i,ll as shown in FIG. 1 could not be adequately dealt with.

In other words, in order to control the catenary, there are two techniques: one that detects and controls the sound of the catenary itself, and the other that detects and controls the tension by using a certain relationship with the catenary tension. However, due to the twisting of the steel plate, detection errors occur due to changes in the area of the steel plate and mechanical loss, making it impossible to achieve high-precision catenary control.

The present invention has been made to solve the above problems, and is a control device for a steel process line equipped with a tension control device i2-'x, which includes a catenary setting device and a catenary detector. Detection f11'' and deviation 'c'jJ of the catenary setter: - is applied to the tension control device via a dead zone element as force correction h1.

Embodiments of the present invention will be described below based on the drawings.

Figure 2 is a block diagram of one embodiment of the present invention.
The material is wound up through an entry roll 3, an intermediate roll 4, and an exit roll 5 in a winding manner not shown.

At speed 1 current control device, B kJ tension control main 11ii
In the return loop, the tension is controlled so that the tension set by the tension rectifier 6 and the tension detected by the tension detector 15 match.
l (controlled by 7K).

Further, the catenary of the steel plate 2 is detected by a catenary detector 16 and compared with the catenary set by a catenary setting device 17, and if a deviation larger than the dead zone defined by the dead zone element 18 occurs, the tension is fully corrected.

The loop consisting of the pick, the catenary detector 16, the catenary setter 11, the dead band element 18 and the integral element 19 constitutes a sub-feedback loop 'fr' of the tension control device.

Note that the integral element 15 in the sub-feedback loop is for suppressing sudden fluctuations in the sub-feedback signal.

The configuration described above produces the following effects.

That is, since the twist of the steel plate does not affect the tension detector 15, stable control can be performed by the main feedback loop B. Furthermore, normal kinks in the steel plate are ignored by the deadband element 1'B, so that kinks in the steel plate do not adversely affect the main feedback loop B.

Even if control is performed by the main feedback loop, when a predetermined catenary cannot be maintained due to changes in the cross-sectional area of the steel plate or mechanical loss, that is, when the catenary deviation exceeds the dead zone region, the sub-feedback loop C comes into play. and correct the tension.

As described above, according to the present invention, it is possible to realize the catenary control of the market control, which has not been possible in the past.

For this reason, when there is a request not to apply copper plate metal coating in the i# construction process, obstacle 1 shown in Figure 1 can be used as a heat insulating plate.
It can be proactively placed to prevent heat radiation from the steel plate, making a significant contribution to energy conservation.

In the figure, 8 is a speed control section, 9 is a current control section, 10 is an output roll motor control section, 11 company current detectors, 12.13
is the rectangle 5 motive, TG, and '1'G is the speed detector.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a state in which the present invention is applied, and the second is a block diagram of an embodiment of the present invention. A...speed control device, B is the main feedback loop for tension control,
C... Sub-feedback loop, 2...- Steel plate, 6...- Tension setting device, 16... Catenary detector, 17... Catenary setting device, 18...° Dead band element, 19... integral element. 4'8 Sennin Kade Yasuyo Electric Manufacturing Co., Ltd. 1st Do 1
1 9th Shil

Claims (1)

[Claims] In a control device for a steel process line equipped with a tension fu control device, a catenary setting device and a catenary detector are provided, and a deviation between a detected value of the catenary detector and a catenary set value is used as tension correction Mi to valve a dead band element. A catenary control device (a) having a brass characteristic that is applied to the tension control device.