JP3513396B2 - Central position control device for web - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a central position control device for controlling the central position of the width of a web which is displaced in a constant pattern in the width direction.

[0002]

2. Description of the Related Art A central position control device means a central position of a width of a web in a process such as rolling, heat treatment, pickling, and surface treatment of a thick plate or a thin plate (web). It is a control device that automatically performs the operation of aligning with the center line.

FIG. 3 shows a device for arranging a central position control device 2 in front of a trimmer (cutter) 3 and trimming the ears at both ends of the web 1. The trimmer 3 is installed so that its center position coincides with the center line of the transfer line, and the center position control device 2 controls so that the width center of the web 1 coincides with the center line of the transfer line.

[0004]

The web 1 has a bend in the width direction called a camber, and in the case of a long web, it is joined by welding. FIG. 4 shows a case where a web having a camber and a welding joint is cut at both ears (ends of the web) by the apparatus shown in FIG. The broken line indicates the cutting position, and this cutting position follows the end shape of the web.
However, it is not desirable that the camber appears in the web shape after cutting the ears.

FIG. 5 shows a method of cutting a web having a camberless shape from a web having a camber and a welded joint. The range in which there is a large change in the width direction including the welded joint is the welding area, and the other areas are general areas. In the general area, the displacement of the same pattern is often repeated every fixed length L. If such a web is cut along a line parallel to the center line of the conveyance line, the cut web can be obtained without bending. However, when cut straight in this manner, the bend in the welded area is large, so that it jumps out of the range of the web, and the trimmer blade is chipped.

The present invention has been made in view of the above problems. When cutting both ears of a web, the web is cut parallel to the center line of the transport line in a general area, but the shape of the web is cut in a predetermined area. An object of the present invention is to provide a central position control device that controls the transport position of the web so that the webs are cut together.

[0007]

In order to achieve the above object, the invention of claim 1 is a central position control device for controlling the width center of a traveling web so that the deviation from the width center of a conveying line becomes zero. The web is loose in the width direction.
In general areas where kana deformation repeats in a predetermined cycle and in the width direction,
There is a predetermined area that undergoes severe deformation in the running direction.
However, the central position control device is installed in the predetermined area of the web.
A first control means for continuously performing the control, and a web
The above-mentioned control is performed for each of the deformation intervals of the general area of
Control state by the second control means and the first control means
And switching means for switching to the control state by the second control means .

In the predetermined area, the first control means for controlling the deviation between the center of the width of the web and the center of the conveying line to 0 can prevent the cutting line from jumping out from the web. In general areas other than the predetermined area, the web is sampled for each predetermined length, and the deviation between the center line of the transport line and the width center of the web at that position is controlled to be zero. As a result, the web is cut along the center line of the width of the web in the predetermined region and parallel to the center line of the transport line in the general region .

According to a second aspect of the invention, the first control means is provided.
Performs the control more rapidly than the second control means .

[0010] predetermined region is short in length, so change rapid, control for the deviation to zero is carried out quickly (rapidly), general District
Since the area has little change in the deviation at the sampling position for each predetermined length of the web, the control is performed gently.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The web central position control device 2 of the present embodiment is located on the upstream side of the trimmer 3 as shown in FIG. 3, and controls the widthwise central position of the web 1 conveyed to the trimmer 3. FIG. 2 shows the shape of the web 1 and the ear cutting plan. The shape of the web 1 is measured in the upstream process,
The ear cutting plan is also calculated by the computer from the shape of the web 1. In the welding area Lo where the welding joint is located, the shape of the web 1 changes greatly and is abrupt, so the central position control device is operated so that the center line of the web 1 and the center of the width of the web 1 coincide with each other. The ear is cut along.

In the general area, the shape of the web 1 repeats the same deformation with a cycle L. Predetermined position a of the web 1
In, the difference between the center line of the transport line and the width center of the web 1 is zero. The position for controlling the width center of the web 1 is sampled at every cycle L with respect to a, that is, at positions b and c, and the deviation is 0 at each sampling position.
It is controlled by the central position control device so that As a result, the ear cutting line by the trimmer 3 becomes parallel to the center line of the transport line as shown by the broken line in FIG.

FIG. 1 shows the configuration of the central position control device of the present invention. In the guide roll 10, the web 1 passes through two rolls, and the roll rotates about a rotation center 10a to displace the web 1 in the width direction. The rotation center 10a is provided on the center line of the transfer line. A right end detection sensor 11a for detecting the right end of the web 1 and a left end sensor 11b for detecting the left end of the web 1 are provided on the exit side of the guide roll 10. If the difference between the detection values of the sensors 11a and 11b is 0, the web is The width center of 1 is on the center line of the transport line. The calculator 12 outputs an operation command to the guide roll 10 as an electric signal based on the detection values of the left and right end detection sensors 11a and 11b. The electric / hydraulic converter 13 converts the electric signal of the operation command into a hydraulic signal. The guide roll operating cylinder 14 rotates the guide roll 10 based on this hydraulic signal.

In the arithmetic unit 12, the difference detector 20 takes out the difference between the left and right edge detecting sensors 11a and 11b, and the deviation calculator 21 calculates the width center of the web 1 from the difference data of the difference detector 20, and this width The shift between the center and the center line of the transport line is calculated. The filter 22 is a device for fetching the data of the deviation calculator 21 for each sampling position of the web 1, and fetches the data of the deviation calculator 21 for each of a, b and c shown in FIG. The switching relay 23 switches between the welding area and the general area. In the general area, the contact of the outlet of the filter 22 is closed and the contact of the deviation calculator 21 on the output side is opened according to an instruction sent from the control device 15. In the welding area, the contact point at the outlet of the filter 22 is opened and the contact point at the outlet of the deviation calculator 21 is closed. G1, G2 and G3 are amplifiers. The gain of G1 is set larger than the gain of G2,
It has a quick response in the welding area and a slow response in the general area.

Next, the operation will be described. While the web 1 in the general area is traveling on the guide roll 10, the switching relay 23 closes the contact at the outlet of the filter 22 and opens the contact at the outlet of the deviation calculator 21. Differences between the outputs of the left and right end detection sensors 11a and 11b are taken by the difference detector 20, and the deviation calculator 21 calculates the deviation between the width center of the web 1 and the center of the conveying line based on this difference. The filter 22 extracts the deviation at the sampling position shown in FIG. 2 from this deviation. This deviation is amplified by G2 and G3 and converted by the electric / hydraulic converter 13 into a hydraulic signal that makes the deviation 0, and the guide roll operating cylinder 14 guides the width center of the web 1 to coincide with the center of the conveying line. The roll 10 is controlled. Since the line connecting the width centers of the web 1 for each shape displacement period L of the web 1 is parallel to the center line of the transport line, FIG.
A cutting line by the trimmer 3 is obtained as shown by the broken line in the general area of.

When the web 1 in the welding area travels on the guide roll 10, the switching relay 23 causes the filter 22 to move.
The contact point of the outlet of the deviation calculator 21 is opened, and the contact point of the deviation calculator 21 on the output side is closed. Accordingly, the output of the deviation calculator 21 is G1, G
3, the electric / hydraulic converter 13 converts the first deviation into a hydraulic signal that makes the first deviation 0, and the guide roll operating cylinder 14 causes the guide roll 10 to move so that the width center of the web 1 coincides with the center of the conveying line. Controlled. Since the width center of the web 1 moves along the center line of the conveying line, a cutting line by the trimmer 3 as shown by a broken line in the welding area of FIG. 2 is obtained. In the welding area, the length of the area is short and the displacement of the web is abrupt, so that the operation is quick.

[0017]

As is apparent from the above description, according to the present invention, in the general area of the web, the deviation is taken for each deformation cycle L of the web so that the center of the width of the web is aligned with the center of the conveying line. A cutting line parallel to the transfer line is obtained, and the deviation is continuously controlled to 0 in the welding area. Therefore, a cutting line along the shape of the web is obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a view showing a cutting line of a web cut according to the present invention.

FIG. 3 is a diagram showing an arrangement of a central position control device and a trimmer.

FIG. 4 is a view showing a conventional web cutting line.

FIG. 5 is a view showing a method of cutting a web having a camberless shape from a web having a camber and a weld joint.

[Explanation of symbols]

1 web 2 Central position control device 3 trimmer 10 Guide roll 10a rotation center 11a right edge detection sensor 11b Left edge detection sensor 12 arithmetic unit 13 Electric / hydraulic converter 14 Guide roll operating cylinder 15 Control device 20 Difference detector 21 Deviation calculator 22 filters 23 Switching relay 23

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroyuki Yokota, 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture, Kawasaki Steel Works, Ltd. (72) Inventor, Neo Tomura, Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Kawasaki Steel Works Co., Ltd. Chiba Works (72) Inventor Ikko Sanbontake 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Works Co., Ltd. Chiba Works (72) Inventor, Katsuto Kawamura 1 Kawasaki-cho, Chuo-ku, Chiba City Address Kawasaki Steel Co., Ltd. Chiba Steel Works (72) Inventor Takashi Tsukada No. 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Co., Ltd. Chiba Works (72) Inventor Kei Yuki, Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Manufacturing Co., Ltd. Chiba Works (56) References JP-A-6-345303 (JP, A) JP-A-9-182909 (JP, A) (58)査the field (Int.Cl. ^7, DB name) B65H 23/032

Claims (2)

(57) [Claims] 1. A central position control device for controlling a width center of a traveling web so that a deviation from a width center of a conveyance line becomes 0 , wherein the web is gently deformed in a width direction at a predetermined cycle.
General area that repeats at and a predetermined area that deforms rapidly in the width direction
And a zone in the traveling direction, the central position control device continuously performing the control on the predetermined zone of the web.
Control means for controlling the general area of the web at each deformation cycle.
Second control means for performing the control state by the first control means and the second control means.
A central position control device for a web, comprising: switching means for switching to a control state according to a step . 2. The first control means controls the control by the first control means .
2. The central position control device for the web according to claim 1 , wherein the control is performed more rapidly than the second control means .