JP4342987B2 - Strip winding method and apparatus - Google Patents

Description

  The present invention relates to a strip winding method and apparatus for improving strip tail end winding accuracy in a steel sheet processing facility.

  Conventionally, when a strip is continuously wound, a certain tension is applied to the strip, and the strip is wound by the end detection device (EPC device) so that the coil edges are aligned. However, when winding the tail end after shear cutting, the strip is in a tensionless state, so the strip edge cannot be accurately recognized by the end detection device (EPC device), and the winding disturbance cannot be controlled. As a result, winding disturbance occurs in the final several turns of the coil. Conventionally, the following methods have been proposed as a method for preventing such tail end disturbance and improving the winding accuracy.

  For example, as disclosed in Japanese Patent Application Laid-Open No. 10-166054 (Patent Document 1), winding is performed in which a non-tensioned strip in which a tail end portion is cut in a delivery facility for manufacturing a steel plate or the like is wound in a coil shape. At the starting contact, at least one pair of horizontally movable side guide rollers in contact with both side edges of the strip, pressing the upper surface of the wound strip against the coil side, the strip is already wound on both side edges. There has been proposed a winding method for a strip which is wound while being guided in the plate width direction so as to coincide with both side edges of the formed coil.

  Further, as disclosed in Japanese Patent Application Laid-Open No. 7-39934 (Patent Document 2), in a strip winder, a plurality of strip edge sensors are installed at different positions in the plate flow direction, and each edge sensor is provided. A strip winding control method has been proposed in which the deviation amount of the strip edge at the position of the tension reel is estimated from the output of the tension reel and the tension reel is moved in a direction to cancel the deviation.

  Further, as disclosed in Japanese Patent Application Laid-Open No. 9-267129 (Patent Document 3), a non-tensioned metal strip is transferred by a magnet conveyor incorporating an electromagnet, and a transfer line is provided on the exit side of the magnet conveyor. A metal strip meandering correction method has been proposed in which the amount of meandering of the metal strip relative to the center of the metal strip is detected and the magnet conveyor is moved in a direction perpendicular to the transfer line based on the amount of meandering. Furthermore, in Japanese Utility Model Publication No. 3-81219 (Patent Document 4), in a magnet conveyor that adsorbs and guides the tail end of a metal strip used in a winder of the metal strip, the direction of the plate passes at the tip of the conveyor body. A magnet conveyor has been proposed which is provided with a magnet roller which can be stretched.

Japanese Patent Laid-Open No. 10-166054 JP 7-39934 A JP 9-267129 A Japanese Utility Model Publication No. 3-81219

  However, the above-mentioned patent document 1 is a method of preventing winding disturbance by guiding the both side edges with guide rollers while pressing the upper surface of the coil against the strip to be wound. There is a problem that damage or the like is considered, and that the combined use of upper winding and lower winding cannot be applied. In addition, as in Patent Document 1, both Patent Documents 2 are solutions to the fact that the strip after shear cutting is wound in a tensionless state. However, edge position recognition error or feed due to strip fluttering is also known. Problems such as inaccuracy due to forward occur.

  Patent Document 3 proposes a method of correcting the meandering of the metal strip using a magnet conveyor. However, the tail end of the strip is wound in a non-tension state after leaving the deflector roll. And the absence of a magnet conveyor immediately after the shear, it is not sufficient to prevent strip fluttering, meandering, and the like. Further, as in Patent Document 3, winding of a strip using a magnetic conveyor has been proposed in Patent Document 4, however, it is attempted to be attracted by line contact from above with a magnet roll. When expanding and contracting, the gap between the magnet conveyor and the magnet roll opens, so that there is a problem that the adsorption stability is poor.

  In order to solve the above-described problems, the inventors have made extensive developments. As a result, in order to solve the problem of the tensionless state of the strip, which is the essence of strip winding disturbance, the coil winding is started from the shear cut position. A plurality of magnet conveyors are arranged up to the position, and the strip is conveyed by the conveyor with the magnet installed, and the winding speed is slightly higher than the conveying speed while the back tension is always applied after shear cutting. A method for securing tension was found.

The gist of the invention is that
(1) In winding the strip, a plurality of magnet conveyors are arranged between the shear cut position and the coil winding position, and the back tension by the magnetic force is always applied even after the shear cut to restrain flapping and meandering of the strip. The coil edge is prevented from being disturbed, and further, the magnet conveyor is shifted in the strip traveling direction together with the electromagnetic magnet according to the coil diameter on the lower surface of the strip, and the back tension by the magnet is ensured until just before winding is completed. How to wind the strip.
(2) In the strip winding described in (1) , a magnet conveyor is provided on the upper surface of the strip just before the snubber roll, and the back tension by the magnet is ensured until the end of the winding with the upper winding. Winding method.

(3) In the strip winding device, the lower guide table having a mechanism for shifting the magnet conveyor in the strip traveling direction together with the electromagnetic magnet according to the coil diameter is provided on the lower surface of the strip in order to ensure the back tension by the magnet until just before the winding is completed. winding apparatus of the strip, characterized in that provided in the.
(4) In the strip winding apparatus according to (3 ) , a magnet conveyor is provided on the upper surface of the strip immediately before the snubber roll in order to ensure a back tension by a magnet until just before the end of winding with the upper winding. the in winding apparatus of the strip, characterized in that provided.

  As described above, by always securing the tension with the back tension by the magnetic force according to the present invention, it was possible to completely prevent the turbulence without breaking the plate shape. In addition, by giving the magnet conveyor installed on the guide table a structure that can be shifted in the strip traveling direction, it becomes possible to restrain the strip until the tail end winding is completed, regardless of the coil diameter. . Furthermore, what was conventionally effective in preventing the winding disturbance only in the case of the upper winding has an extremely excellent effect such that it can be applied to both the upper winding and the lower winding according to the present invention.

The present invention will be described in detail below with reference to the drawings.
FIG. 1 is an overall conceptual diagram of a strip winding device according to the present invention. As shown in this figure, the strip 1 that has been continuously passed through is usually a strip that comes into contact with the deflector roll 3 and the upper surface of the strip after the tail end is cut by the shear-cut equipment 2 provided on the outlet side. It is guided by a pinch roll 5 for pressing, and is wound into a coil 4 shape by a tension reel 6 in a tensionless and meandering controlled state. When this transfer line is a continuous line, two winders are usually installed on the line exit side, and the preceding strip is No. Assuming that the tail end portion is cut by the shear cutting equipment, the tail end portion is taken up to the end in a non-tensioned state, while the subsequent strip is No. 1 transferred by the conveyor. Winding is started by a two winder.

  In the above-described process, in the present invention, a transport conveyor 7 having an electromagnetic magnet 8 that attracts a metal strip is disposed between the position of the shear cutting equipment 2 and the deflector roll 3, and even after the strip 1 is cut. Since the strip 1 and the transport conveyor 7 are synchronously transported by the transport conveyor 7 provided with the magnets 8, the strip 1 is transported without becoming tensionless and meandering even after the strip 1 is cut. As a result, the strip 1 can be conveyed while restraining flapping and meandering of the strip by always applying a back tension by magnetic force even after the tail end portion is cut by the shear cutting equipment 2. Reference numeral 9 denotes an end position detecting device.

  Next, the strip 1 guided by the deflector roll 3 and the pinch roll 5 was provided with an upper guide table 10 and a lower guide table that can secure a back tension by a magnet until just before the winding of the upper winding and the lower winding. That is, the upper guide table 10 and the lower guide table are also provided with a transport conveyor 7 provided with an electromagnetic magnet 8, and in order to ensure the back tension by the magnet until just before the end of winding, the lower guide table according to the coil diameter. A mechanism for shifting the strip in the strip traveling direction was provided.

  FIG. 2 is a detailed view of the apparatus with a magnet conveyor in the upper winding according to the present invention. As shown in this figure, on the upper surface of the strip, an upper guide table 10 provided with a transfer conveyor 7 equipped with an electromagnetic magnet 8 is disposed immediately before the snubber roll 12 in order to ensure back tension by the magnet until just before the end of winding. The lower guide table 11 is provided on the lower surface of the strip, and the lower guide table 11 has a function of shifting the conveyor 7 together with the electromagnetic magnet 8 in the strip traveling direction according to the coil diameter. As a result, since the back tension is always applied, it is possible to prevent the occurrence of fluttering and meandering of the strip. Furthermore, since it is not used with a guide roller or the like, the strip edge can be wound without being broken or damaged.

  FIG. 3 is a detailed view of the apparatus with a magnet conveyor in the lower winding according to the present invention. As shown in this figure, a lower guide table 11 is disposed on the lower surface of the strip, and in order to secure a back tension by the magnet until the winding is completed, an electromagnetic magnet is provided on the lower guide table 11 according to the coil diameter. 8 and a function of shifting the conveyor 7 in the strip traveling direction.

  In this way, by always securing the tension with the back tension by the magnetic force according to the present invention, it is possible to completely prevent the turbulence without breaking the plate shape, and to wind the strip edge without being broken or damaged. It was. Furthermore, by giving the magnet conveyor installed in the guide table a structure that can be shifted in the strip traveling direction, the back tension of the strip by the magnet can be secured until the winding is completed, regardless of the coil diameter. What was effective in preventing winding disturbance only in the case of the upper winding can be applied to both the upper winding and the lower winding.

1 is an overall conceptual diagram of a strip winding device according to the present invention. It is detail drawing of the apparatus with a magnet conveyor by the upper winding which concerns on this invention. It is detail drawing of the apparatus with a magnet conveyor by the lower winding which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strip 2 Shear cutting equipment 3 Deflector roll 4 Coil 5 Pinch roll 6 Tension reel 7 Conveyor 8 Electromagnetic magnet 9 End position detection apparatus 10 Upper guide table 11 Lower guide table 12 Snubber roll


Patent applicant: Nippon Steel Corporation and 1 other
Attorney Attorney Shiina and others 1

Claims (4)

In strip winding, a plurality of magnet conveyors are arranged between the shear cutting position and the coil winding position, and after the shear cutting, the back tension by the magnetic force is always applied to restrain the flapping and meandering of the strip, and the coil edge. Further, the back surface of the strip is secured on the lower surface of the strip by shifting the magnet conveyor together with the electromagnetic magnet in the strip traveling direction according to the coil diameter to ensure the back tension by the magnet until just before the end of winding . Winding method. In the winding of the strip according to claim 1, the winding method of the strip, characterized in that the magnet conveyor disposed directly in front of the Sunabaroru the strip upper surface, to secure a back tension by the magnets to the winding immediately before use in the first winding . In the strip winding device, a lower guide table having a mechanism for shifting the magnet conveyor in the strip traveling direction together with the electromagnetic magnet according to the coil diameter is provided on the lower surface of the strip in order to ensure the back tension by the magnet until just before the winding is completed. A strip winding device. 4. The strip winding apparatus according to claim 3, wherein a magnet conveyor is provided on the upper surface of the strip immediately before the snubber roll in order to secure a back tension by a magnet until just before the end of the upper winding. A strip winding device.

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