JPS59124647A - Side guide locating method - Google Patents

Abstract

PURPOSE:To locate steel sheets of continuous strip with high accuracy and a simple device by determining side guide stopping time according to time difference for detecting the sheet edges between left and right sheet edge detectors to maintain constant a gap between the side guides and the sheet edges. CONSTITUTION:Sheet edge detecting output signals of both sheet edge detectors 18, 19 are sent to the inputs of an OR circuit 25 and an AND circuit 26 respectively, and the outputs of said circuits 25, 26 are connected to a timer 27 from which the operation time difference signal between both sheet edge detectors 18, 19 is sent to the input of a calculating circuit 28 to calculate motor stopping period and generate stop command to a motor 14. For example, when the difference t between the operation times of both sheet edge detectors 18, 19 corresponds to a half of distance between the suide guides 1, 2 and the sh eet edge detector, i.e. time L/2V(provided V is the moving speed of side guide), both side guides 1, 2 are immediately stopped and thus the total gap between the side guide and the sheet edge is L as shown in the drawing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for positioning a steel plate side guide in the plate width direction (Q positioning).

Generally, a pair of side guides are installed on both sides of each strip of steel plate on the processing line in order to guide the continuous strip of steel plate or the like along the processing line such as a continuous annealing line without meandering. I'm putting it on.

In particular, in continuous annealing lines, steps occur in the strip width direction at coil joints due to differences in strip width, so the position of the side guides that guide the strip to the center of the processing line in the strip width direction must be adjusted to match the steps. Need to readjust.

Conventionally, a device as shown in FIG. 1 has been used to automatically position such side guides in the board width direction.

In Figure 1, 1 and 2 are left and right side guides,
A side guide 1.
Sliders 5 and 6 of 2 are mounted so as to be slidable in the length direction of the guide rod, and a side guide 1 is mounted on each slider 5 and 6.
and 2 are rotatably supported via bearings 7 and 8, respectively. Support frame 3 at the lower position of guide rod 4
A screw rod 9 is rotatably supported and attached to the screw rod 9.
is provided with a right-hand thread and a left-hand thread, and the left and right sliders 5 and 6 are connected by connecting members 12 and 13 to nuts 10 and 11 screwed into these right-hand threads and left-hand threads, respectively. 9 is a reversible motor 14
By rotating the left and right side guides 1
and 2 are configured to be moved in the board width direction in the direction of the arrow or in the direction of B.

In order to position the side guides 1, J, and 2 according to the width of the steel plate 15, a plate edge detector 18.19 is used by a holding arm 16.17 connected to each slider 5 J3 and 6.
is held at a position inside the side guides 1 and 2, and the motor 14 is stopped when both the left and right plate edge detectors 18, 19 detect the plate edge, as shown in FIG.

According to the positioning device configured as described above, for example, the step at the joint of the coil is detected and the side guide 1.2 is opened by moving the side guide 1.2 in the opening direction shown by arrow B by the motor 14 in response to the increase in the width of the χ plate. After that, when moving in the closing direction shown by arrow A to position the side guide, the motor 14 drives the threaded rod 9, and the plate end detectors 18 and 19 detect both the left and right plate ends 2.
By detecting 0°21, the motor 14 is stopped and the positions of the side guides 1 and 2 are set.

Generally, it is desirable to set the gap between the side guides 1, 2 and the plate edge 20.21 to an appropriate value, for example, 1oII11, so that the distance between the side guide 1.2 and the plate edge detector 18.19 is set to an appropriate value.

However, according to the conventional direction described above, both the left and right plate end detectors 18. ．． Since the motor is stopped by detecting the edge of the plate, the gap between the side guide and the edge of the plate is not constant, resulting in a large error.

That is, as shown in FIG. 3(a), when the center of the steel plate 15 coincides with the center of the line, the steel plate 15 is placed at a position where the total gap between the side guides 1 and 2 and the plate end is 21. Both side guides are positioned, but when the steel plate 15 is extremely biased to one side and the side guide 2 is in contact with one plate end 21, as shown in FIG. 3(b'), , the total gap is L, and Fig. 3(C)
As shown in J, there are cases in which positioning is performed in an intermediate state between FIG. 3(a) and FIG. 3(b), and there is a problem that the total gap changes variously.

In order to solve the problem of errors in the positioning of the side guides depending on the position of the steel plate in the width direction, as shown in FIG.
Measure the board width with C, measure the amount of movement of the side guides with the distance meter 24 attached to the screw rod 9, and find that both side guides 1 and 2 are separated by a distance equal to the measured value of the board width plus a predetermined gap value. It has been proposed that the motor 4 is driven to move the side guide by a predetermined movement m so that the position is determined. However, this method has the problem of making the device complicated and expensive.

The present invention was developed in view of the above-mentioned problem, and the stop timing of the left and right side guides is determined based on the time difference t between when one of the left and right board edge detectors detects the board edge and when the other detects the board edge. After π- from the time of detection by the detector (V is the moving speed of the side guide)
The object of the present invention is to provide a method for performing highly accurate positioning using a simple device.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 5 shows the main scale using the conventional device shown in Figure 1.

1 is a block diagram illustrating an operation control circuit for positioning a side guide in the width direction of a steel plate using the method.

As shown in FIG.
6, connect the outputs of the OR circuit 25 and the AND circuit 26 to the timer 27, and input the operation time difference signal of both plate edge detectors from the timer 27 to the calculation circuit 28 to calculate the motor stop timing. It is configured to output a stop command to the motor 14 to stop the motor 14.

For example, as shown in FIG.
．． 19 detects the edge of the plate at the same time and operates, the side guide is moved for an extra time of half the distance 11tL between the side guide and the plate edge detector and then stopped. Therefore, the left and right side guides 1 and 1 are moved by the motor 4 to move them an additional distance (see Fig. 6).
It stops as shown in a), and the total gap between the both side guides 1.2 and the left and right ends 20, 21 of the steel plate 15 is 1-.

Next, if the difference t in the operating time of both sheet edge detectors is equal to half the distance between the nide guide and the sheet edge detector (see Figure 3(b)), then both two 4 Noid Guide 1.2 is immediately stopped, and this causes 4
The gap between the noid kite and the plate end is 1' as shown in FIG. 6(b).

In addition, if a shift in the operating time corresponding to Fig. 3 (C) occurs, the motor 4 is operated an extra distance ρ, that is, time - minutes V, as shown in Fig. 6 (C). Make sure that the total gap between the side guide and the plate edge is .

As mentioned above, by measuring the deviation in the operating time of both the left and right plate edge detectors, the motor stop timing is calculated from the operating time difference, and by delaying the stop command to the drive device by that time, the side guide and plate edge detector are It is possible to accurately position the steel plate so that the gap between the processing line and the processing line is always 1, and it is possible to run the steel plate etc. almost in the center of the processing line without meandering.

7 and 8 show that the image sensor 30
An embodiment of the present invention configured to detect and operate a side kite will be shown. As shown in FIG. 8, after detecting the step 31, when the step has advanced a distance of λ - Δ℃, the motor 14 is operated in the opening direction to bring the sight guides 1 and 2 to the fully open position, and the step is removed from the step. After advancing a distance of β0Δβ from the detection point, the motor 14 is reversed in the closing direction, the side guide 1.2 is closed, and the motor 14 is stopped at the stop time determined from the operation deviation time of both plate edge detectors 18.19. is configured to stop.

As described above, according to the present invention, it is possible to easily maintain a constant gap between the side kite and the board edge by determining when to stop the side guide based on the time difference between when the drawing board edge detector detects the board edge. This provides the effect of always holding the steel plate in the center of the processing line with low equipment costs.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of a conventional sword guide positioning device, Fig. 412 is a Norrock diagram showing the conventional method for positioning the guide blade, Fig. 3 is an explanatory diagram of the conventional method, Fig. 4 5 is a schematic diagram showing another conventional method, FIG. 5 is a block diagram showing the →noid guy positioning method according to the present invention, and FIG. 6 is an explanation of the Lee 1-Kite positioning method according to the present invention. Figure 7 shows an embodiment of the present invention. 1 shelf route map, No. 8
The figure is a block diagram showing the control method according to the embodiment shown in FIG.

Claims (1)

[Claims] 1. A pair σ) 1 Noi I for guiding the #14 plate etc. from both sides
When positioning the two guides in the width direction of the plate, move the plate D2i detector to the planned distance I! from both side guides. ill
L is installed at the inside position, and the time difference between when both plate edge detectors detect the plate edge (side guide 0) stops. 1. A method for positioning a side guide 1 seam, characterized in that the gap between the side guide and the plate end is made constant by adjusting the moving speed of the side guide 1.