JPS61203059A - Device of correcting meandering of band plate - Google Patents

Abstract

PURPOSE:To prevent hunting due to overshift by setting the axis of a pivotal shaft of a correction roll of a device for correcting meandering of a band plate on the center line of a line between the center line of an admission side correction roll and the tangent line of the admission side outer peripheral surface. CONSTITUTION:A frame 4 to which meandering correction linger rolls 2a, 2b of a band plate 1 are fixed is turned on the horizontal surface with respect to support tables 3a, 3b by a cylinder 7 driven in response to a correction signal. The center of rotation is set on the center line X of a line between the axis line (y) of an admission side linger roll 2a and an admission side outer peripheral edge line (x) thereof. In this arrangement, when the linger rolls a, 2b are turned, the center points Oa, Ob are always on the same side with respect to the center line of the line unlike the conventional method. Thus, the occurrence of hunting due to overshift can be avoided.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a strip meandering correction device incorporated in equipment that continuously processes strips such as steel strips.<Prior Art> Continuous pickling In a line that continuously processes strips such as equipment, the strips progress in a catenary or almost straight line on the upper surface of a multi-wire idle roll, but this progress is mainly due to the defective shape of the strip. It often has meandering inside. Therefore, various meandering correction devices are used to correct the meandering and perform smooth strip threading.9 These meandering correction devices are used in various continuous strip processing lines.

As shown in FIG. 4 showing a typical example of the conventional meandering correction device and FIG. They are arranged in parallel along the traveling direction Z of the plate 1. Rin rolls 2a.

Both ends of the strip 2b are rotatably supported on a frame 4 which is horizontally movably supported on support stands 3a and 3b, and a rolling blade (not shown) is appropriately applied to clamp the strip 1. . The frame 4 includes a pair of ringer rolls 2a on the entry side and the exit side.

It can swing in both directions of arrow a within a range of angle θ about a swing axis 5 set in the middle of 2b. This swinging of the frame 4 is performed by actuation of a driving device such as a cylinder 7 via a lever 6 that is integrated with the frame 4.

As shown in FIG. 6, which shows the operating principle of this device, when the strip plate 1 on the exit side of the ringer roll 2b on the exit side meandered toward the right in the figure by a distance S from the line center X during sheet threading. Then, the cylinder 7 is actuated based on a signal from a position detector (not shown) provided on the exit side of the device, and the frame 4, that is, the ringer rolls 2a and 2b, is rotated counterclockwise in the figure at an angle θX.
By rotating the ringer roll 2b by a distance sb, the center point Ob of the ringer roll 2b on the exit side is displaced by a distance sb to the anti-meandering side, that is, the position Ob' on the left side in the figure, and this action returns the υ band plate 1 to the left side, I'm trying to fix it.

On the other hand, as shown in FIG. 7, which shows another example of the conventional meandering correction device, in this example, each pair of the inlet side ringer roll 2a and the outlet side ringer roll 2b is mounted on an independent frame 4.
It is equipped on a and 4b. Each frame 4a, 4b has a swing shaft 5 provided on the roll axis at one end of each frame.
a.

5b as a center, it can swing on the supports 3a and 3b parallel to the surface of the strip plate 1 in the direction of arrow a in the figure, respectively, within a range of angle θ. This swing is caused by the lever 6a.

6b and link 8a by the operation of cylinder 7a, and opposite ends of frames 4a and 4b are connected to each other by link 8b.

As shown in figure M8 showing the operating principle of this device, when the strip plate 1 on the exit side of the ringer roll 2b meanders by a distance S to the right in the figure, the signal from the position detector causes the cylinder 7a to The ringer rolls 2a and 2b each have a swing shaft 5a.

It rotates counterclockwise in the figure by the same angle θX about 5b. Therefore, the lingual rolls 2a, 2 on the entry side and the exit side
The center points Oa and Ob of b are respectively at the position Oa on the left side of the diagram.
, Ob〃 by distances Sa' and Sb', and by this action, the band plate 1 is returned to the left side in the figure to correct the meandering.

<Problems to be solved by the invention> In the first conventional device shown in FIGS. 4 to 6,
When attempting to correct the meandering to the right in the figure by rocking counterclockwise as shown in FIG. Then, it is displaced by a distance Sa to the right side with respect to the line center X, that is, to the position Oa' on the meandering side, and acts to cause the strip plate 1 on the entry side to meander further.

Here, since the displacement amount of the roll center point is 5a (Sb), 5b-8a is not effective for meandering correction, and the correction effect is diminished.If meandering correction is insufficient due to this,
The rotation angle θX of the roll further increases due to the command from the position detector, and finally an overshift phenomenon occurs in which the strip 1 meanderes to the left of the line center X, contrary to the above, and as a result, hunting is repeated. Things often get out of control.

In the case of the second conventional device shown in FIGS. 7 and 8,
Entry side and exit side lingual roll 2a.

The body length center points Oa and Ob of 2b are both displaced by the same distance sSa' = Sb' to the same side of the line center Meandering can be effectively corrected in both equipment and equipment. Therefore, when the entrance path of the strip plate 1 on the entrance side of the ringer roll 2a is substantially straight, the problem of hunting due to overshift as described above does not occur.

However, as shown in FIG. 9, which shows an example of the entering state of the strip, when the strip 1 enters in a catenary shape, the strip 10
Due to the winding angle α, the contact start position with respect to the ringer roll 2a is shifted from the roll axis to the entrance side of the strip plate 10. As shown in FIG. 8, the position of the roll center point m of this contact starting portion is at the position m' as the angle θX swings.

That is, it moves to the right of the line center X by a distance Sm. For this reason, as in the case of the previous example, there is a problem in that the correction effect is diminished and hunting eventually occurs due to overshifting.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems with conventional meandering correction devices and to provide a rational meandering correction device that does not cause hunting due to overshifting.

<Means for Solving the Problems> The strip meandering correcting device of the present invention includes at least a pair of rotatable correction rolls that pinch the strip from above and below, and the correction rolls are oscillated perpendicularly to the strip. In a strip meandering correction device comprising a swinging mechanism that is swung by a rotating shaft, the axis of the swinging shaft of the correction roll is set on the line center line, and the correction roll on the entrance side of the strip is The axis of the swing shaft is located between the center and a tangent to the outer peripheral surface of the correction roll on the entry side.

<Operation> The swinging mechanism is operated in response to the meandering of the strip, and the correction roll is swung parallel to the strip surface. Then, the roll center of the strip contact portion of each correction roll is displaced to the anti-meandering side regardless of whether the strip advances in a substantially straight line or in a catenary shape, and the correction effect is diminished. There is no meandering, and the meandering correction is effectively carried out.

<Example> As shown in FIG. 1 showing the planar shape of an embodiment of the strip meandering correction device according to the present invention, FIG. A single frame 4 rotatably supports the inlet and outlet glue rolls 2a, 2b'i, and supports a plurality of support rollers 10 set on drive and work side support stands 3a' and 3b. It is swingably supported parallel to the surface of the strip plate 1. or,
At least two or more pairs of opposing horizontally rotatable guide rollers 11 are attached to the lower surfaces of the drive side and the work side of the common frame 4, respectively, and support stands 3a, 3.
The guide rails 12a and 12b, which form part of a circular track fixedly mounted on the guide rails 12a and 12b, are sandwiched between the guide rails 12a and 12b.

The center of rotation of the guide rails 12a, 12b, that is, the center of swing of the ringer rolls 2a, 2b, is the swing axis OP, which is the center of rotation of the guide rails 12a, 12b. and the roll axis line y, and are arranged so as to be on an imaginary line segment OI Oa connecting the points Of and Oa where both the lines x and y intersect the line center line X. In the illustrated example, the swing axis Op is the roll outer peripheral edge line
It coincides with the intersection point 01 between the line center line X and the line center line X. In addition,
Although not shown in detail, a drive device such as a cylinder 7 that swings the frame 4 via a lever 6 is pivotally attached to a bracket 13 that projects from the support base 3a.

When the strip plate 1 meanderes from the line center line X to the right side in the figure by a distance S on the exit side of the strip plate 1, the amount of meandering is detected by a position detector (not shown) as in the case of the conventional example described above, Based on the signal, the cylinder 7 operates to produce the ringer roll 2a.

2b is an angle θ centered on the swing axis Op (left rotation in the figure)
Swings by X. As a result, the center points Oa, O of each roll
b is always displaced on the same side with respect to the line center line Even when the strip 1 enters in a catenary shape at an arbitrary winding angle α, the roll center point m at the contact start position between the entry side Ringer roll 2a and the strip 1 is on the line segment 010a, so the roll center No problem occurs because the roll center points Oa and Ob are displaced to the same side as the points Oa and Ob.Furthermore, in the device of the present invention, the amount of displacement of the roll center points Oa and Ob for the same swing angle θX is
This results in a rather significant increase compared to the conventional device. Incidentally, the required swing angle θX in order to set the displacement amount sb of one center point ob of the exit side Ringer roll 2b to 15.8 mm is θx in the case of the swing axis Op shown in diagram M3.
=1°6', whereas in the case of the first conventional example shown in FIG. 6, θx =3°10'.

Therefore, the position of the swing axis OP in the device of the present invention is adapted to the situation of the approach path of the strip 1, and the line segment 01-Oa is
By setting it at the appropriate position above, the meandering correction is always carried out very effectively regardless of the approach path of the strip 1, and there is no occurrence of notching caused by an overshift phenomenon as in conventional devices.

In the above explanation, we have described the case where a double ringer roll is used as a meandering correction roll, but this correction roll is not limited to a ringer roll, and can be any ordinary roll made of metal or non-metallic material. Well, again,
There is no need to limit the number of upper and lower roll pairs to two, and the present invention can be applied to an arrangement of at least one pair of rolls. Further, the device of the present invention is not limited to the above-described embodiments, and can be implemented with various design modifications within the scope of the technical idea of the present invention.

<Effects of the Invention> According to the present invention, it is possible to constantly correct the meandering of the strip very effectively in a continuous strip processing line, and to prevent the strip from being bent due to the overshift phenomenon that occurs in conventional equipment. This will ensure smooth line operation.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the strip meandering correction device of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a diagram of its operating principle.
FIG. 4 is a plan view showing an example of a conventional strip meandering correction device;
Figure M5 is a front view of the same, Figure 6 is a diagram of its operating principle, Figure 7 is a plan view showing another example of the conventional strip meandering correction device, Figure 8 is a diagram of its operating principle, and Figure 9 is a diagram of its operating principle. It is a conceptual diagram showing the approach situation of the board. In the drawings, 1 is a band plate, 2a and 2b are ring rolls, 3a and 3b are support stands, 4 is a frame, 7 is a cylinder, 11 is a guide roller, 12a and 12b are guide rails, and 13 is a bracket. X is the line center line, Op is the swing axis, and Oa and Ob are the center points of the roll.

Claims (1)

[Claims] A strip meandering correction device comprising at least a pair of rotatable correction rolls that pinch the strip from above and below, and a swing mechanism that swings the correction rolls about a swing axis perpendicular to the strip, The axis of the swinging shaft of the correction roll is set on the line center line, and the swinging is performed between the center of the correction roll on the entrance side of the strip plate and the tangent to the outer peripheral surface of the correction roll on the entrance side. Strip meandering correction device that positions the axis of the shaft.