JPS6082213A - Looper control device - Google Patents

Abstract

PURPOSE:To apply adequate tension to a strip even if the temp. of the strip fluctuates by detecting the temp. fluctuation of the strip and correcting the strip tension. CONSTITUTION:A detecting means captures a strip temp. SV in the inlet side of the n-th stand and transmits the temp. to a tension correction generator 7b. The generator 7b makes a tension correction signal SAM and transmits the signal to a tension setter 7a. The setter 7a is inputted with a reference signal SR for the tension value, a plate width signal SW and a plate thickness signal STG together with the signal SAM and calculates the set reference for the tension value. A torque reference is determined according to the set reference of the tension value and a motor is so driven as to have the torque corresponding to the torque reference thereby lifting a looper. A PLG feeds at the same time the position of the looper back to a looper control device which changes the speed of the mill motor by a mill driving device according to said feedback signal thereby stabilizing the looper in the specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a looper control device for determining the loop tension, or tension, of a strip in a finishing mill in a continuous hot rolling facility VrL.

[Prior art]

A conventional device of this type will be described with reference to FIGS. 1 and 2.

? I', Figure 1 is a schematic diagram showing the rolling configuration in the finishing mill and the tension control configuration of the two-worked strip.

In the figure, (1) is the mn stand, (2) is the (n+1)th stand on the lower side of the nth stand (1), (3) is the strip which is the rolled material to be rolled in the finishing mill, and (4) is the )
is a louver that lifts up the strip (8), and the strip (81i) between the n-th stand (1) and the (nu)-th stand (2) is lifted up against the louver (4) f'L with a predetermined tension. The given value is F(-).

In addition, (5) is the electric motor that moves the louver (4), (6) is the drive device that drives the electric motor 4-a (5J), and (7) is the amount of drive of the electric motor (5), that is, the movement of the looper (4). amount,
Furthermore, the tension of the EL strip (8) is determined by the output of the louver control device (7) in one louver control device which provides a standard for the tension of the other type of snare strip (8). Note that (8) is a pulse generator (hereinafter referred to as ``PLGJ'') that is attached to the electric motor (5) and generates a louver (sword-like Vi, 71-).

Furthermore, (9) is a mill vLtJJJ machine that moves the n-th stand (1) by 1', (L (j is the looper control cage (7)
〃Milden considering No. 16 of 1! 1! lI machine (0)
f(-The mill drive is on the sidelines.

FIG. 2 is an explanatory diagram illustrating the input/output No. 4g related to the tension setting device in the above-mentioned louver control device (7).

In the figure, (7a) is a tension setting device. The force foot device (7a) receives a reference signal B of the tension value of the strip (3).
R, the board width signal of the strip (8) Swl The board width signal STH of the strip (8) is input, and the turtle kJ
A reference signal S7o relating to the torque of the motor (5) is outputted to the motor drive device (6) VC.

Next, the operation will be explained.

The tension setting device (7a) inputs the tension plate 14 signal 8□, the plate width signal swp and the plate thickness 4d'Tll, and based on these signals, first performs the calculation of the following equation (1). Calculate all tension value setting standards.

(Tension value setting standard) = (Tension value standard) × (Plate width) × (Plate thickness) ・−・・−(11 Next, use the tension setting device (7a) if, based on the tension value setting standard , determines the torque reference of the electric motor (5), and sends the torque reference signal STo to 1M and the motor drive device (6).

The electric motor unit wJ device (6) drives the ta machine (5) to have the torque indicated by the torque reference signal S7°, and the electric motor (
5 order 7 torque VC Eli roots < (4) t iJI
To lift the strip (8i, change the loop and apply a predetermined tension to the strip (81). Also, the position of the looper (4) FiP Based on the foot signal VC, the louver 1iilJ controller (7) generates a position correction signal 'f:%' in addition to a signal for looper control, and sends the position correction signal 'f:%' to the mill drive device αυ. death.

Therefore, by changing the speed of the mill electric motor (9),
The position of (4) is made to be the Ichigo position tt.

However, in conventional louver control devices, the strip tension is set as described above, and temperature fluctuations in the strip are not taken into consideration, resulting in unstable looper control without providing an appropriate strip tension. The drawback is that
Temperature change 3 @ Vc The width and thickness of the Eli strip g: changes,
The disadvantage was that the tension value per unit area changed, which adversely affected the strip.

[Summary of the invention]

Misfire f! In consideration of the above points, the purpose of the present invention is to provide a louver control device that can correct the tension value setting standard in accordance with fluctuations in the temperature of the strip and provide the correct tension.

In order to achieve all of these objectives, the louver control device of the present invention has the following features:
Detection means for detecting a change S in predetermined rolling conditions, j? ! and correction signal generating means for creating a tension correction signal based on the detected fluctuation value and sending it to the tension setting device, and automatically correcting the tension value setting standard to fluctuations in the predetermined rolling conditions. That's what I did.

[Embodiments of the invention]

The present invention will be explained below with reference to FIG.

FIG. 3 is an explanatory diagram for explaining signal transmission and reception near the tension setting device (7a) of Roots (city control device Cγ) pHI according to an embodiment of the present invention.
- In addition to each number indicated in n, the tension B 'rA G'i (
7a), tension correction generation e-straddle (7a) is a correction signal generation means.
b) Tension correction No. 46 "AM" for f'≧ is input.The tension correction generator (711) uses a detection means (not shown) to detect the temperature at the entrance side of the n-th stand (1), which is detected by the force 5. 8v
Tension correction No. 1H SA according to the temperature fluctuation by inputting
M t” is output.

Therefore, in the implementation period shown in FIG.
b) Send rt, tension correction generator (7b) Create tension correction signal 8AM based on the (2J formula) of the force i under B pi (1)
0 1 ” (T To ) / Tomssss (2) sent to the force footing device (7a)
However, To: Initial stand III degree.

'r　: @n stand enter Confucian warm limbs.

The tension setting device (7a) together with this tension correction signal 8AM.

As in the past, the tension value reference signal SR1, plate width signal SW, and plate thickness signal 8TH are input to calculate the tension value setting standard using the following equations (8) Vc and c.

(Tension value setting standard) = (Tension value standard] x (Plate width) x (Plate thickness) x (Tension correction signal) φ... (8) Based on this tension value setting standard, set the position of the looper (4). The operation after the movement is the same as the conventional one.In other words, a torque standard is determined based on the tension value setting standard tl-, and a machine having a torque corresponding to the torque standard is set.
Drive the looper (4), and at the same time lift the looper (4).
LO (8) is the position of the looper (4).
1, and based on the feedback signal, the speed of the mill motor (9) is changed by the mill drive device -VC, and the looper (4) is stabilized at a constant position.

In this way, the tension of the strip (8) can be made more stable than before by taking into account the temperature fluctuations of the strip (8).

In addition, in the above embodiment, the temperature change on the entrance side of the nth stand! I
The method of creating tension correction No. 100 based on ll was shown, but the method of creating tension correction No. 100 based on the rolling reaction force fluctuation of the nth stand,
Alternatively, it may be created based on the rolling reaction force of the n-th stand, the gap of the n-th stand, and the outlet side plate thickness f of the n-th stand, which is obtained by calculating the plate thickness using VC. Roughly speaking, the force correction signal is determined based on the ratio of the deviation of the entrance side temperature from the initial value to the initial value, but it may also be determined by multiplying the absolute value and the gain t.

〔Effect of the invention〕

As mentioned above, in advance, if CTT is used, the temperature fluctuation of the strip will be taken care of and the strip tension will be increased? : Since the sleeve is configured to be corrected, there is an effect that a stable loopal υ control device that can apply an appropriate tension even when the temperature of the strip changes is obtained.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the tension control deposit for a two-way strip rolled in a finishing mill; The figure is an explanatory diagram showing the input and output of the tension setting device according to one embodiment of the present invention. (i), (2): Stand (8) Nistrip (4): Looper (6): Electric motor (6): Electric motor drive device! (7): Looper control device (7
a): Tension setting device (7b): Tension correction generator S bar tension value 2!1 Junior number B1: Plate width signal 5Tll: Plate thickness signal sAM: Stress correction flaw signal Sv: Inlet side temperature sTo: Torque In Figure 1, the reference signal 4j indicates the same or equivalent. Agent Masuo Oiwa Procedural amendment (voluntary) Commissioner of the Japan Patent Office 1. Indication of the case: Japanese Patent Application No. 188157/1982 2. Title of the invention: Looper control device 3. Person making the amendment 5. Description of the specification to be amended. Detailed Description of the Invention a. 6. The statement "..., that is, tension" in the second to third lines of page 2 of the statement of contents of the amendment was amended to "... and tension".j1
Yo.

Claims (1)

[Claims] (1) A looper that is equipped with a tension setting device that creates a standard for setting the strip tension value between the V4!7 mating stands of the continuous hot rolling machine, and that controls the strip tension by adjusting the position of the looper. The control device K is provided with a detection means for detecting fluctuations in predetermined rolling conditions, and a correction number generating means for creating a tension correction number based on the detected fluctuation value and sending it to the upper bC tension setting device. A louver control device characterized in that the tension value setting standard is automatically corrected according to fluctuations in the predetermined rolling conditions. (2) The looper control device according to claim 1, wherein the predetermined rolling condition is the temperature of the entire strip. (8) The looper control device according to claim 1, wherein the rolling reaction force is the rolling reaction force of all stands under predetermined rolling conditions.