JPH03142012A - Method for correcting position of coiling reel in coiling or uncoiling strip - Google Patents

Abstract

PURPOSE:To prevent a trouble such as generation of pinch on a sheet, etc., by changing a speed to shift a coiling reel in the axial direction in proportion to a line speed when the speed of an uncoiling strip comes under the critical line speed. CONSTITUTION:The coil 1 of an uncoiling reel 7 is uncoiled. Both edges are arranged in the neighborhood of a deflection roll 5, the meandering of the strip 2 is detected by a strip position detector 6, a shift cylinder 4 is extended and contracted by the instruction of a controller 9 and an uncoiling reel 7 is shifted with an uncoiling machine 3 to correct the position. When the speed of the strip 2 reaches a low speed under a specified critical line speed, the shift speed of the uncoiling reel 7 is shifted at a low speed in proportion to the line speed and, as a result, the deflection roll 5 is prevented from restraining the strip 2 and the line operation is stabilized without making a trouble such as generation of a pich on the sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for correcting the position of a winding reel during winding or unwinding of a strip in a continuous processing line.

<Prior art> - In a line that continuously processes strips in M, the fourth
As shown in the figure, the center bobbin 3 control (C
PC) is performed.

This m1ll allows the coil rewinding machine 3 to be shifted in the axial direction together with the unwinding reel 7 by a shift cylinder 4, and is installed near the downstream side (or upstream side) of the first deflection roll 5 adjacent to the unwinding reel 7. The edge position of the strip 2 is detected by, for example, a light projection type strip position detector 6. In this way, in order to adjust the displacement of the strip 2 due to the snake to the line center, the coil l wound on the payoff reel 7 is moved to the shift cylinder 4 together with the coil winding a3.
The position is corrected by shifting in the axial direction.

Usually, the first deflector roll 5 is fixedly installed, and the strip 2 is wound around this deflector roll 5, so that its Fg! The frictional force weakens the ability to shift and center the coil rewinder 3 in the axial direction.

In other words, even if the detector 6 detects the amount of displacement of the strip 2 and shifts the unwinder 3 in the axial direction to adjust it, the essential strip 2 is restrained by the deflector roll 5 and cannot be aligned. Sometimes it does not work, and if the restraint is large, strip 2
This can lead to problems such as apertures occurring.

In order to prevent such troubles, as shown in FIG. 5, the first deflector roll 5 is also made shiftable in the axial direction, and the rewinding machine 3 and the first deflector roll 5 are connected by a connecting member 8. A method is also known in which the first deflector roll 5 can be shifted integrally with the rewinder 8!3. However, this method increases the number of mechanically movable parts and requires the connecting member 8 to have a certain degree of rigidity, making the equipment large-scale, and it has not always been actively adopted due to economic reasons such as increased construction costs.

<Problems to be Solved by the Invention> As shown in FIG. 4, it is preferable that the first deflector roll 5 is fixedly installed because the equipment configuration is simple. Generally, if the line is running at a normal line speed, the strip 2 will be restrained by the first deflector roll 5 as described above, and the position of the strip 2 will be normal even if the coil unwinding machine 3 is shifted in the axial direction. There is no such thing as not being corrected.

The reason for this is that the coil 1 and the first deflector roll 5 are located close to each other, so that at a normal line speed, the strip 2 unwound from the coil 1 reaches the first deflector roll 5 immediately. Therefore, when the unwinding machine 3 is shifted in the axial direction, the strip 2 unwound from the shifted position reaches the first deflecting roll 5 in a very short time, so that the strip 2 is substantially almost at the first deflecting roll 5. The rewind reel 7 can be shifted in the axial direction without being restrained by the deflector roll 5.

However, when the line speed is low, for example, during threading until the unwinding coil 1 is pulled out to the line and the leading end of the strip 2 is passed through the continuous processing line, or when the trailing end of the strip 2 runs out of the line, etc. When the speed becomes low, it takes time for the strip 2 rewound by the coil 1 to reach the first deflector roll 5.

Therefore, when the rewind reel 7 is shifted in the axial direction, the strip 2 is strongly restrained by the first deflector roll 5,
The position in the width direction of the strip detected by the detector 6 does not change, and the unwinding la3 overshifts, causing a squeeze in the plate between the coil l and the first deflector roll 5, especially in the case of an extremely thin strip. Sometimes.

Therefore, when the line speed is low, such as when threading the tip of strip 2, the center position control is canceled (O
FF), special measures such as adjusting the rewind reel 7 in the axial direction become necessary.

However, in today's automated continuous processing lines, the entry side threading is naturally fully automated, and various inspection equipment and automatic stop control devices are installed for this purpose, from the coil unwinding IIJ3 to the welding machine that welds and connects the strips. Threading distances are becoming longer. In such continuous processing of strips, there is a strong demand to perform threading without canceling the automatic control by center position control.

In addition, in the above case, we explained the problems when unwinding and pulling out the coil from the unwinding reel of the unwinding machine.
It is exactly the same when winding the strip onto the winding reel of the winder (in this case the take-up reel) in a continuous processing line.
When the line speed is reduced, the strip will be restrained by deflector rolls adjacent to the take-up reel of the winder.

The present invention was made in view of the above circumstances, and even if the deflector roll adjacent to the winding reel is fixedly installed, when the strip is running at a normal line speed, the unwinding machine or There is no problem in shifting the winding reel in the axial direction by the winding machine. Therefore, even when the line speed becomes low, the present invention eliminates problems such as strip constriction caused by overshifting of the winding reel. It is an object of the present invention to provide a method for correcting the position of a winding reel during winding or unwinding of a strip, which allows the winding reel to be shifted axially without disturbing the winding reel.

<Means for Solving Problem i1> The present invention for achieving the above object provides that when the strip is wound up or unwound using a winding reel in a line that continuously processes a strip, a winding reel adjacent to the winding reel is used. In the method for correcting the position of a winding reel during winding or unwinding of a strip, the displacement amount due to meandering of the strip is detected near the deflector roll, and the position of the winding reel is shifted in the axial direction according to the displacement amount. Shifting the position of the reel axially at a steady speed establishes a critical line speed at which the winding reel overspeeds the line speed and the strip is restrained by the adjacent deflector roll, and A winding reel for winding or unwinding a strip, characterized in that when the strip drops below the astral line speed, the speed at which the winding reel is shifted in the axial direction is increased or decreased in proportion to the reduced line speed. This is a position correction method.

Since the present invention has the above-described configuration, when the speed of the continuous processing line falls below the critical line speed, the winding reel is reduced in the axial direction in proportion to the line speed in response to the amount of displacement due to meandering of the strip. Increase or decrease the speed to the desired speed.

For this reason, the winding reel does not exceed the line speed, so the restraint of the strip by the adjacent deflector rolls is reduced, and the position of the winding reel can be corrected without causing problems such as plate drawing of the strip. Can be done.

The restraining force of the deflector roll on the strip due to the shift in the axial direction of the winding reel varies depending on equipment conditions such as equipment layout, strip specification conditions such as plate thickness, and operating conditions such as line speed, so please be sure to A critical line speed is determined correspondingly, and the shift speed of the winding reel in the axial direction is adjusted based on this set critical line speed as described above.

<Example> An example of the present invention will be described below with reference to the drawings. FIGS. 1(a) and 1(b) show a plan view and a side view showing an outline of a device for correcting the position of the rewind reel 7 in rewinding 8!3. Since the outline of the device to be corrected is the same as the conventional example shown in FIG. 4 in which the deflector roll 5 is fixedly installed, the explanation will be focused here mainly on the differences from the conventional example.

In FIGS. 1(a) and 1(b), the positions of both ends of the strip 2, which is unwound from the coil 1 wound on the unwinding reel 7 at a predetermined steady line speed, are moved by the deflector roll 5.
The light projection type strip position detectors 6 (
The displacement of the strip 2 due to meandering is detected by a detector (hereinafter referred to as a detector). The thus detected displacement signal of the strip 2 is input to the controller 9, and the controller 9 operates the hydraulic system according to the amount of displacement of the strip 2, expands and contracts the shift cylinder 4 with the hydraulic pressure supplied to the extraction pipe IO, and winds the shift cylinder 4. The unwinding reel 7 is shifted in the axial direction along with the unwinding fi3, and the strip 2 unwound from the coil 1 is corrected to match the line center.

The steady state shift speed S for shifting the unwinding reel 7 in the axial direction is about 30 to 50 m/sec, and as shown in FIG. Perform center alignment.When the rewind reel 7 is moved in the axial direction at a steady shift speed S, the shift speed exceeds the line speed,
A critical line speed "a" at which the strip 2 is restrained by the first deflector roll 5 is set and inputted to the controller 9, and the position i of the unwinding reel 7 is set based on this value.
Correct 1f and perform center position control.

When the strip 2 being unwound from the coil 1 wound on the unwinding reel 7 is threaded at a steady line speed (for example, about 60 m/...in) that exceeds the critical line speed a, the detector 6 detects the strip. When the displacement due to the meandering of the sensor 2 is detected, a command is issued from the controller 9 in response to a change in the signal from the detector 6. This command activates the hydraulic system to extend or retract the shift cylinder 4, and the position of the rewind reel 7 is adjusted to the steady shift speed S (for example, 30 to 50+ ma /
sec) to correct the position of the rewind reel 7 and bring the strip 2 into alignment at the line stop.

When the detector 6 detects displacement due to meandering of the strip 2 while the strip 2 is being fed at a low speed below the limit line speed a during unwinding during threading or ash removal, etc., the detector 6 In response to the signal change, a command is issued from the controller 9, the hydraulic system is operated, and the position of the rewind reel 7 is shifted at a low speed below the steady shift speed S.

The degree of low speed at which the unwinding reel 7 is shifted is made proportional to the slowed line speed, as shown in FIG. 2, to prevent the strip 2 from being restrained by the first deflector roll 5. Rewind coil 1 while
When the line is stopped, the shift speed of the rewind reel 7 is set to zero and set to 1 so that no shifting is performed. This is to prevent the strip 2 from being restrained by the first deflection roll 5 when the line is restarted if the unwinding reel 7 shifts while the line is stopped, causing problems such as plate squeezing of the strip 2. be.

Note that when the unwinding reel 7 is moved in the axial direction, whether or not the strip 2 is restrained by the first deflecting roll 5 and temporary squeezing occurs is determined by the restraining force generated on the plate and the rigidity of the plate. ! Although it is also affected by the distance between the return reel 7 and the first deflection roll 5, this depends on the arrangement of the equipment, so if the equipment is the same, it will not change and will remain constant.

On the other hand, although the specifications such as the thickness of the strip 2 vary, the shift speed of the unwinding reel 7 in the axial direction is the first.
If the strip 2 can shift normally by overcoming the restraint of the deflector roll 5, it is advantageous for operation to increase the shift speed as much as possible.

Therefore, the proportional relationship between the line speed and the shift speed of the unwinding reel 7 below the critical line speed a is made variable depending on the thickness of the strip 2, as shown in FIG. Increase the proportional slope, and reduce the slope for thin plates.

In other words, the critical line speed a is set to a lower speed for thick plates than for thin plates, and in a range where the line speed is smaller than the critical line speed a, the shift speed of the unwinding reel 7 relative to the line speed is set to the plate thickness. The thicker plates are made relatively larger than the thinner ones.

By setting and controlling the critical line speed a in accordance with the thickness of the strip 2 in this way, it is possible to more effectively control the centroid silane. In the above embodiment, the case of a rewinding machine was explained, but it goes without saying that the present invention can be similarly applied to a winding machine.

<Effects of the Invention> As explained above, according to the apparatus of the present invention, automatic center position control is adopted even during low-speed threading of ultra-thin strips using a simple mechanism in which the first deflector roll is fixedly installed. Stable line operation is achieved without causing problems such as plate constriction.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, (a)
is a plan view, (b) is a side view, Figure 2 is a diagram showing the relationship between line speed and shift speed, and Figure 3 is a diagram showing the relationship between line speed and shift speed for thick and thin plates. FIG. 4 is a schematic diagram showing a conventional example, and (a
) is a plan view, (b) is a side view, and FIG. 5 is a schematic diagram showing another conventional example, (a) is a plan view, and (b) is a side view. 1...Coil, 2...Strip, 3...
... Rewinding machine, 4... Shift cylinder, 5.
...First deflection roll, 6.. Strip position detection 2L 7.. Rewinding reel, 8.. Connection member, 9..
Controller, 10... Hydraulic piping.

Claims (1)

[Claims] In a line that continuously processes strips, when winding or unwinding the strip using a winding reel, the amount of displacement due to meandering of the strip is detected near the deflector roll adjacent to the winding reel, and the amount of displacement is detected according to the amount of displacement. In the method for correcting the position of a winding reel during winding or unwinding of a strip by shifting the position of the winding reel in the axial direction, shifting the position of the winding reel in the axial direction at a steady speed;
A critical line speed is determined at which the winding reel exceeds the line speed and the strip is restrained by an adjacent deflector roll, and when the strip being wound or unwound falls below the critical line speed,
A method for correcting the position of a winding reel during winding or unwinding of a strip, characterized in that the speed at which the winding reel is shifted in the axial direction is increased or decreased in proportion to the reduced line speed.