JPH11267748A - Winding method of metal strip using belt wrapper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winding method of a metal strip to which a belt wrapper for assisting winding especially at the time of starting winding is applied with respect to the winding method for winding the metal strip onto a winding reel. SOLUTION: A winding reel 4, onto which a sleeve 41 having a recessed part in the width direction of the surface is fit, is provided. When a metal strip 1 is started to be wound, the tip end part of the metal strip 1 is butted against the recessed part 42 existing in the sleeve 41, and winding is started. A gap A of a fixed value or more is set between a guide roll 5 of a belt wrapper and the winding reel 4 for the duration of applying the belt wrapper until winding is stabilized after starting winding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a metal band around a winding machine, and more particularly to a method for winding a metal band to which a belt wrapper is applied to assist winding from the start of winding until the winding is stabilized. Method improvement.

[0002]

2. Description of the Related Art In recent years, in continuous annealing equipment, hot-dip galvanizing equipment, electroplating equipment, etc., a belt wrapper which can be easily automated when winding a metal strip represented by a steel strip into a product coil. Is being applied. The bell wrapper is a device that assists the winding of the metal band at the start of winding, and its outline is shown in FIG. Belt wrapper belt 2 is roll 3,
It is wound around a take-up reel 4 of a take-up device by a guide roll 5 and a pinch roll 6. The description of other components of the bell trapper is omitted here, but the belt is configured to be endless. Description of the winding device other than the winding reel 4 is also omitted.

[0003] The belt wrapper, when the leading end of the metal band 1 has entered the take-up reel 4 of the take-up device,
A device that functions to assist the winding of the metal band 1 on the take-up reel 4 using the belt 2 wound along the take-up reel 4. The metal band is wound around the take-up reel by several turns. When the take-up is stabilized, the take-up reel is automatically retracted.

However, as shown in FIG. 3, there has been a problem that a top mark 10 is generated when the metal strip 1 is wound around the take-up reel 4. The top mark is generated due to a step in the thickness of the tip of the metal strip 1. That is, the top mark is generated when the metal band 1 is constricted due to a winding force or the like when the metal band 1 is wound around the take-up reel 4.
Then, the take-up reel 4 takes up the belt 2 of the belt wrapper.
This is further promoted by the pressing force F when the guide roll 5 guiding the metal strip 1 presses the metal strip 1.

In Japanese Patent Publication No. 54-37265, a take-up reel is used as a stepped winding shaft, and the tip of a metal strip is detected, and control is performed so that the leading end comes to the step position of the stepped winding shaft. A technique has been disclosed which eliminates a step in the thickness of the leading end portion, which causes a top mark.

[0006]

However, in the prior art, it is difficult to accurately control the front end of the metal band to be at the step due to slippage of the metal band. Further, the thickness of the metal strip is various, and it is difficult to change the step in accordance with all the thicknesses.

It is an object of the present invention to provide a method of winding a metal band using a belt wrapper that can greatly reduce the occurrence of top marks by a simple method that requires little capital investment.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a method of winding a metal band using a belt wrapper in a metal band winding device. And during the application of the belt wrapper from winding to stable winding, during application of the belt wrapper having a gap (A) of a fixed value or more between the guide roll of the belt wrapper and the take-up reel, The above problem was solved by providing a gap (A) of a certain value or more between the take-up reels.

It has been found that it is preferable that the gap (A) having a value equal to or larger than a predetermined value is set to satisfy A ≧ (plate thickness of metal band) × (number of turns of metal band to which belt wrapper is applied). .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. When the winding of the metal band 1 around the take-up reel 4 is started, the guide roll 5 of the belt wrapper is used.
Is a feature of the present application to prevent the contact with the metal strip 1.

That is, assuming that the distance of the gap between the surface of the take-up reel 4 and the surface of the roll of the guide roll 5 is A, the following is satisfied: A ≧ (plate thickness of metal band) × (number of turns of metal band to which belt wrapper is applied) That is, the guide roll 5 is fixed in such a manner as to perform the operation. The gap between the surface of the guide roll and the surface of the take-up reel can be easily fixed by providing a stopper on the rotation shaft of a guide roll arm (not shown).

Since the guide roll 5 does not directly press the surface of the wound metal band, it is possible to avoid the largest factor for forming the top mark. Therefore, when the metal band is wound directly on the take-up reel, or when the sleeve is mounted on the take-up reel and the metal band is wound, occurrence of a top mark can be significantly reduced. Furthermore, when using a sleeve 41 provided with a concave portion 42 in the width direction of the surface and winding the metal band in such a manner that the front end portion of the metal band matches the concave portion, it is necessary to strictly define the shape and depth of the concave portion. Instead, it is sufficient to form a concave portion having an approximate shape and an approximate depth according to the shape of the tip of the metal strip. It is needless to say that it is preferable that the tip of the metal band and the recess of the sleeve are completely aligned and wound, but in the present invention, it is not necessary that both are completely aligned. In addition, the control at the start of the winding of the metal band does not require accuracy, but may be rough. For this reason, even if there is a certain gap between the recess and the tip of the metal band, it is permissible.

That is, at the start of the winding of the metal band, the guide roll, which had been subjected to the force F for pressing the take-up reel, is not brought into contact with the metal band. No contact belt was brought into contact with the belt, and no excessive surface pressure was applied to the metal band, so that the formation of the top mark was not promoted.

Here, the influence of the belt itself on the formation of the top mark is not great, but it goes without saying that it is preferable to keep the belt tension as small as possible.

[0015]

EXAMPLE A comparison was made between a case where the method of the present invention was applied and a case where the conventional method was applied in a method of winding a metal band using a belt wrapper. As the metal strip, a very low carbon steel strip with a thickness of 0.8 mm was used. The sleeve was made of rubber, and provided with a recess having a step (D) of 2 mm as shown in FIG. In addition, 5
Winding is performed with a gap (G) of mm.

In the present invention, the gap (A) between the guide roll and the sleeve surface is set to 4 mm. In the conventional example, the gap between the tip of the metal strip and the recess is set to 2 mm and 5 mm so that the pressing force (F) is applied under the same conditions as in the normal operation. FIG. 5 shows how the top mark is generated with respect to the distance from the inner diameter end of the coil (that is, the tip of the metal strip). The vertical axis indicates that the top mark level is good, that is, the level at which the top mark is small, as the upward direction, and the level without the top mark indicated by the dotted line indicates the level at which the top mark is not recognized.

FIG. 5 shows that the top mark is improved by about 20 m as a whole in the example of the present invention as compared with the conventional example. That is, by applying the present invention, not only the occurrence of the top mark can be reduced, but also when the sleeve provided with the concave portion is used, the tip portion and the concave portion of the metal band, which were conventionally limited to about ± 2 mm. The gap (G) can be made to be about ± 5 mm, and it is possible to reduce the defective portion due to the top mark without strictly aligning the tip of the metal band.

[0018]

According to the present invention, not only the top mark at the tip of the metal strip can be reduced, but also when a sleeve having a recess is used, strict position control for positioning the tip of the metal strip is performed. This has the effect of reducing top mark defects at the tip of the metal strip, and has enabled an improvement in product yield with inexpensive capital investment.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a belt wrapper to which a metal band winding method of the present invention is applied.

FIG. 2 is a schematic sectional view of a conventional belt wrapper.

FIG. 3 is a partial cross-sectional view illustrating a principle of generating a top mark of a metal band at the time of winding.

FIG. 4 is a partial cross-sectional view illustrating conditions of an example of a belt wrapper to which the metal band winding method of the present invention is applied.

FIG. 5 shows the method of the present invention and the conventional method,
It is a graph which compares the top mark level according to the distance from the coil inside diameter end of a metal strip.

[Explanation of symbols]

 1 strip 2 belt 3 roll 4 take-up reel 5 guide roll 6 pinch roll 10 top mark 41 sleeve 42 hollow

Claims (2)

[Claims] 1. A method of winding a metal band using a bell wrapper, wherein when starting to wind the metal band around a take-up reel, the belt wrapper is applied during the application of the belt wrapper from the start of winding to the stable winding. During application of the belt wrapper having a gap (A) of a certain value or more between the guide roll and the take-up reel, a gap (A) of a certain value or more between the guide roll of the belt wrapper and the take-up reel is applied. A method of winding a metal band using a belt wrapper, characterized in that the metal band is wound. 2. The gap (A) having a value equal to or greater than the predetermined value is defined as A ≧
The method for winding a metal band using a belt wrapper according to claim 1, wherein (plate thickness of the metal band) x (number of turns of the metal band to which the belt wrapper is applied).