JPH05317963A - Strip transporting device of continuous rolling equipment - Google Patents

Abstract

PURPOSE:To maintain a high strip supply speed by providing a selection means for selectively changing over a pass line to either one of two units of run-out tables. CONSTITUTION:A coil is cut by a crop shear 2 when the coiling on a mandrel 5 of a first down coiler 6a ends. The outside diameter of the mandrel 5 is then reduced and the coil is removed. The excitation states of both electromagnetic devices 7a, 7b provided at a shunt point are changed over from below to above during the time to attract the beginning end of the strip 1 to the upper side. The excitation states of respective guide rolls 8 of the upper and lower run-out tables 3a, 3b are successively changed over according to the passage of the strip 1 simultaneously therewith to change over the pass line of the strip 1 to the upper side. The taking up on the mandrel 5 is started when the beginning end of the strip 1 arrives at the second down coiler 6b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous strip mill equipped with two winding devices, in which the strip flow for each winding device can be selectively switched. It relates to the device.

[0002]

2. Description of the Related Art Strips produced by continuous rolling equipment are usually shipped in a coiled state. That is, the strip continuously supplied from the rolling device is cut by the crop shear every time a predetermined amount is wound around the mandrel of the down coiler, and is conveyed to the stock area in the state of the coil removed from the mandrel. At this time, it is desirable to remove the wound coil from the mandrel and minimize the loss time at the time of starting the winding of the next coil. Generally, continuous operation is performed by replacing two down coilers.

Now, two down coilers are provided,
As one of the methods for switching the pass line toward the other down coiler when one has completed winding, it is known to move the pinch roll, but there is a limit to the speed of movement, so There is no choice but to limit the strip feed rate. In general, a method of accumulating the strip with a looper device is adopted, but this requires a relatively large space and cannot be applied to a thick plate or a hot-rolled strip.

[0004]

DISCLOSURE OF THE INVENTION The present invention has the disadvantages of the prior art, that is, the looper device requires a large installation space, and cannot be applied to a thick plate or a hot-rolled strip. The main purpose of this is to enable continuous switching with high space efficiency and high speed switching between two down coilers, even for thick strips and hot rolled strips. An object of the present invention is to provide a strip transport device for rolling equipment.

[0005]

According to the present invention, such an object is to provide a cutting machine for cutting a strip manufactured by continuous rolling, and a downstream of the cutting machine for winding the strip into a coil. The structure of the strip transporting device in the continuous rolling equipment having two winding devices provided on the side is provided with two upper and lower stages to guide the flow of the strip between the cutting machine and the two winding devices. Two runout tables arranged in parallel with each other, a selection means for selectively switching a pass line to either one of the two runout tables, and at least an upper runout table of the two runout tables. And a magnetic attraction means provided. In particular, it is preferable that the magnetic attraction means comprises electromagnets provided on a plurality of guide rolls attached to the runout table.

[0006]

According to this structure, the pass line of the strip can be instantaneously changed for the two runout tables arranged vertically in accordance with the cutting timing, so that a high strip feeding speed can be maintained. be able to. If the magnetic attraction means is provided on the guide roll of the upper run-out table, the strip can be stably conveyed while attracted to the lower surface of the guide roll.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings.

FIG. 1 schematically shows the equipment structure according to the present invention. This equipment comprises a crop shear 2 installed on the most upstream side in the flow direction of the strip 1 and a strip on the downstream side. Two sets of upper and lower runout tables 3a and 3b provided for diverting one pass line,
It is installed on the most downstream side of the flow of the strip 1 and comprises two sets of down coilers 6a and 6b each provided with a pinch roll 4 and a mandrel 5.

At the shunting points of the two sets of runout tables 3a and 3b, two sets of electromagnetic magnet devices 7a and 7b for switching the pass line are installed so as to face the upper surface and the lower surface of the strip 1, respectively. . Each runout table 3a, 3b is provided with a plurality of guide rolls 8 for guiding the flow of the strip 1, and an exciting coil 9 is wound around these guide rolls 8. .

The upper runout table 3b and the first runout table 3b
A backup roll 10 is provided between the down coiler 6a and the down coiler 6a to prevent the strip 1 from falling even if the magnetic attraction means provided on the upper runout table 3b side should fail. ing.

Now, assuming that the strip 1 is wound around the first down coiler 6a via the lower runout table 3a, the upper electromagnetic magnet device 7b is demagnetized at this time, and the lower electromagnetic device 7b is demagnetized. The magnet device 7a is excited. At the same time, the exciting coils 9 attached to the guide rolls 8 of the upper runout table 3b are all demagnetized, and the exciting coils 9 attached to the guide rolls 8 of the lower runout table 3a are all excited. Therefore, the strip 1 is attracted to the lower runout table 3a, and its pass line is defined.

The strip 1 includes down coilers 6a and 6b.
It is wound into a coil by, but at this time, it is wound around the mandrel 5 while back tension is applied by the pinch rolls 4 provided on the pass line.

When the coil is wound around the mandrel 5 of the first down coiler 6a, it is cut by the crop shear 2 to reduce the outer diameter of the mandrel 5 and the coil is taken out. The excitation state of the electromagnetic magnet devices 7a and 7b is switched from the bottom to the top, and the starting end of the strip 1 is attracted to the top. At the same time, as the strip 1 passes, the upper and lower runout tables 3
The excitation states of the guide rolls 8a and 3b are sequentially switched to switch the pass line of the strip 1 to the upper side. When the starting end of the strip 1 reaches the second down coiler 6b, the winding on the mandrel 5 is started.

If these are sequentially replaced, the strip 1 can be continuously wound by the two down coilers 6a and 6b by alternately switching the pass lines of the strip 1 continuously.

In the above embodiment, electromagnetic force is used as the magnetic means, but this may be one in which a permanent magnet is brought into contact with or separated from the pass line. Further, the path line switching device is not limited to the above embodiment, and for example, an actuator operated by fluid pressure is used to vertically move the tip end portion of the strip 1 at the flow dividing points of the upper and lower runout tables 3a and 3b. You can Furthermore, the guide roll 8 of the upper runout table 3b may be configured to be movable up and down, so that the direction of the strip 1 can be gradually changed when switching the pass line. In some cases, the pass line can be regulated only by the guide rolls without providing magnetic means on the lower runout table 3a.

[0016]

As described above, according to the present invention, since the pass line can be changed in an extremely short time, the looper is not necessary or the scale thereof can be reduced in the case of cold rolling equipment. It is also possible to handle products with large plate thickness and strips that have been hot-rolled, which could not be handled sufficiently with loopers.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of equipment according to the present invention.

[Explanation of symbols]

 1 Strip 2 Crop Shear 3a ・ 3b Runout Table 4 Pinch Roll 5 Mandrel 6a ・ 6b Downcoiler 7a ・ 7b Electromagnetic Magnet Device 8 Roll 9 Excitation Coil

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location // B65H 29/60 A 9147-3F

Claims (2)

[Claims] 1. A continuous rolling machine comprising a cutting machine for cutting a strip produced by continuous rolling, and two winding devices provided downstream of the cutting machine to wind the strip into a coil. A strip transporting device in equipment, comprising two runout tables arranged in parallel in two stages to guide the flow of strip between the cutting machine and the two winding devices; A selection unit for selectively switching the pass line to one of the two runout tables, and a magnetic attraction unit provided on at least the upper runout table of the two runout tables. Strip conveyor for continuous rolling equipment. 2. The strip transporting device in a continuous rolling facility according to claim 1, wherein the magnetic attraction means comprises electromagnets provided on a plurality of guide rolls attached to the runout table.