JPH0788547A - Coiling method - Google Patents

Abstract

PURPOSE:To provide the coiling method capable of coiling a thick strip by a belt wrapper system in which alignment between the tip of the strip and a reel for coiling is obviated and folding in of an innermost peripheral end part is also obviated. CONSTITUTION:In coiling of the thick strip in the range of 1.2-10.0mm thickness which is subjected to hot rolling, the tip of the strip S is subjected to initial coiling around the periphery of the reel 1 for coiling while being induced by a belt wrapper 9 and the diameter of the reel 1 for coiling is extended excessively according to thickness at the point of time when initial coiling is completed, by which the coiling property is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil winding method for winding a strip of hot finish rolling into a coil, and particularly to a belt wrapper method for a thick sheet having a thickness of 6 mm, which has been impossible in the past. It is possible to wind by.

[0002]

2. Description of the Related Art Generally, as a coil winding method for winding a hot finish rolled strip into a coil, when the winding speed is relatively slow, either a belt wrapper method or a grip method is used. ing. The former is for winding on a winding reel while guiding it using a winding belt arranged on the outer circumference of the winding reel. Conventionally, a so-called thin or medium-thick material having a thickness of about 1.2 mm to 6.0 mm is exclusively used. It has been used to wind strips.

On the other hand, the latter is one in which the tip of the strip is inserted into a grip groove provided in the winding reel and is held on the winding reel while holding it. A thick strip having a thickness of more than 6.0 mm is a belt wrapper. Since the method does not allow winding on a reel, the grip method has been used exclusively for winding.

[0004]

However, in the case of the grip method of the above-mentioned two types of coil winding methods, both the strip and the winding reel are moving although the speed is slow. However, it is not easy to align the tip of the strip with the grip groove of the take-up reel, the skill is required for the operation, and the automatic operation is also difficult, which often requires manual intervention by the operator. Furthermore, the innermost end of the coil discharged after winding is still inserted into the grip groove and bent, and this bent part makes it difficult to handle the coil in the next process or in the coil consumer. However, there was also a problem that the yield was reduced by cutting off the bent portion.

According to the belt wrapper method, such a problem does not occur, but in the conventional belt wrapper method, when the strip is thicker than 6.0 mm, the rigidity of the strip is too high and the reel is sufficiently wound. Since it was difficult to put them together, it could not be used for winding thick materials. Therefore, the present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a coil winding method capable of winding a thick strip by a belt wrapper method, which has been impossible in the past. And

[0006]

The invention according to claim 1 which achieves the above object, is a sheet thickness 1.2 rolled by a hot finish rolling mill.
When winding a strip in the range of up to 10.0 mm into a coil, perform the initial winding for about one round while guiding the strip tip to the outer circumference of the winding reel with a belt wrapper.
Immediately after that, the diameter of the winding reel is increased by the reel expansion amount set in advance according to the strip plate thickness, and the winding is continued by the belt wrapper method.

Further, according to a second aspect of the present invention, when a strip having a plate thickness of 1.2 to 10.0 mm rolled by a hot finish rolling mill is wound into a coil, the tip of the strip is belted on the outer circumference of the winding reel. The initial winding is performed while guiding with the wrapper, and when the initial winding number reaches the preset number of windings according to the strip plate thickness, the diameter of the winding reel is increased by a certain amount and the belt wrapper method is continued. It is characterized by being wound up with.

[0008]

[Operation] When the strip is thicker than 6.0 mm, the rigidity is high, so if the tip of the strip is guided to the take-up reel by the belt wrapper, the strip will not be able to adhere to the outer circumference of the reel and will be wound loosely through the gap. . According to the first aspect of the present invention, when the end of the strip overlaps the inner surface of the succeeding strip after one round of extra winding, the diameter of the reel for winding is enlarged to forcibly bring the outer periphery of the reel and the strip into close contact with each other. Improve the wrapping property of. The larger the plate thickness, the greater the pressure required to deform the strip when wound on the reel.The larger the plate thickness, the larger the reel expansion amount is set. Can be taken.

According to the second aspect of the present invention, the reel expansion amount is fixed to a substantially constant amount regardless of the plate thickness. However, in this case, the timing of reel expansion is not necessarily limited to the time when one extra turn is wound, and is changed according to the plate thickness. For example, if the plate thickness is as thick as 9 mm or 10 mm, the reel is expanded at the time of extra winding, but if the plate thickness is relatively small at 4 mm or 5 mm, the reel is expanded at the time of winding about three rounds. Improves the winding property around the reel.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 1 schematically shows the structure of the winding reel 1. This is a structure in which the diameter is hydraulically expanded / contracted similarly to the mandrel expansion / contraction mechanism of the wedge type mandrel which is usually used to extract the wound coil from the mandrel of the winding machine. That is, in the winding reel 1, a reel core 4 having a plurality of wedges 3 is fitted to the inner circumference of a segment 2 obtained by dividing a cylinder into four. The reel core 4 is axially driven forward and backward by a hydraulic cylinder 5. When the reel core 4 is in the retracted limit position, the outer diameter of the winding reel 1 is the smallest. When the reel core 4 moves forward, the taper surface of the wedge 3 exerts an outward pressing force on the segment 2.
In addition, the diameter of the winding reel 1 is increased. The relationship between the amount of advancement of the reel core 4 and the amount of expansion of the reel diameter at this time is determined by the size of the wedge 3 and the taper angle. The control of the forward / backward drive of the reel core 4 is performed by a hydraulically operated valve 8 arranged in a hydraulic pipe 7 connecting a hydraulic cylinder 5 and a hydraulic source 6.
This is done by controlling the opening and closing of.

In the case of this embodiment, the relationship between the plate thickness (mm) of the strip and the diameter expansion amount (mm) of the winding reel 1 as shown in FIG. It is input to the host controller 10 that controls the entire drive. For example, with respect to the reel expansion amount that enables good winding by the belt wrapper method, a quantity relationship of 15 mm at a plate thickness of 10 mm, about 5 mm at a plate thickness of 6 mm, and about 3 mm at a plate thickness of 5 mm was obtained.

Next, with reference to FIG. 3, a procedure of winding the strip S having a given plate thickness on the winding reel 1 by the belt wrapper method will be described with reference to this relationship. The board thickness T of the strip S (for example, 10 mm) is set in the host controller 10.
Enter. The strip S is guided by the belt wrapper 9 and loosely winds around the outer periphery of the winding reel 1 through a gap [FIG. 3 (a)]. At this time, the diameter expansion amount of the winding reel 1 is zero. As shown in FIG. 3 (b),
When the leading end of the strip S is about one round (1.1 to 1.2 rounds) and the inner surface of the subsequent strip begins to overlap, the initial winding completion signal M is input to the host controller 10, and the host controller 10 sends it to the processor 11. A calculation command is issued to the device.
In response to this, the arithmetic unit 11 calculates a required diameter expansion amount (for example, 15 mm) of the winding reel 1. On the basis of the reel diameter expansion amount thus obtained, the movement amount of the reel core 4 is calculated by the arithmetic unit 12 and output to the control unit 13 of the hydraulically operated valve 8, and the electromagnetic hydraulically operated valve 8 is operated to operate the hydraulic power source 6.
The hydraulic pressure from is supplied to the hydraulic cylinder 5. Arithmetic unit 1
After the reel core 4 has moved forward by the distance calculated in 2, the hydraulically operated valve 8 is reversely operated, the supply to the hydraulic cylinder 5 is cut off, and the reel core 4 is stopped and held at that position. As a result, the diameter of the winding reel 1 is enlarged by a size (15 mm) corresponding to the plate thickness (10 mm). As a result,
As shown in (c), there is no gap between the winding reel 1 and the inner surface of the strip S that has been loosely wound, the two are in close contact with each other, and a strong frictional force is generated. While being held, it is wound up on the winding reel 1.

In this case, as shown in FIG. 2, if the thickness of the winding reel 1 is 4 mm or less, the winding amount of the winding reel 1 is almost zero, and the belt wrapper type winding can be performed. Next, another embodiment will be described. Unlike the first embodiment, this is a system in which the diameter expansion amount of the winding reel 1 is kept constant and the initial number of windings of the strip S (the number of windings until the start of reel expansion) is changed according to the plate thickness. .

In this case, the relationship between the strip thickness (mm) as shown in FIG. 4 and the initial winding number is experimentally obtained in advance and input to the host controller 10. For example, the initial number of windings that enables good winding with the belt wrapper method is 1.0 to 1.2 windings with a plate thickness of 10 mm, and a plate thickness of 8
A quantity relationship of 1.0 to 1.6 turns for mm, 1.0 to 2.3 turns for 6 mm plate thickness, and 1.0 to 2.8 turns for 5 mm plate thickness was obtained. In the procedure of winding the strip S having a given plate thickness on the winding reel 1 by the belt wrapper method using this relationship, the arithmetic unit 11 does not calculate the required diameter enlargement amount of the winding reel 1. Except for this, it is almost the same as the case of the first embodiment. Winding reel 1 in this case
The diameter expansion amount is appropriately fixed within the range of 5 to 15 mm. Further, the timing at which the initial winding completion signal is input to the host controller 10 is such that the tip of the strip S is the same as in FIG.
It is when the preset number of turns is reached within the range shown in.

In each of the above-mentioned embodiments, the case where the wedge type expansion / contraction mechanism is used as the winding reel 1 has been described, but the present invention is not limited to this and other known mechanisms such as a link type and a toggle type may be used. May be. Further, the relationship between the plate thickness and the reel expansion amount or the relationship between the plate thickness and the initial winding number is not limited to that of the embodiment, but may change depending on the steel type of the strip S, etc., and may be experimental or empirical. It is necessary to obtain the relationship in advance.

[0016]

As described above, according to the method of the present invention, the initial winding is performed while the strip tip is guided by the belt trumpet on the outer periphery of the winding reel, and immediately after the completion, the diameter of the winding reel is increased. Since the set amount was over-expanded and the belt was continuously wound by the belt wrapper method, the winding property of the strip on the winding reel was improved. As a result, even a strip S having a plate thickness of 6 mm or more, which has been impossible in the past, can be wound by the belt wrapper method, and various problems in the grip method, that is, the tip of the strip and the reel for winding. It is not easy to align the grip groove with the grip groove, it requires skill to operate, and automatic operation is difficult, often requiring manual intervention by the operator, and the innermost circumference of the coil delivered after winding. Since the end portion of the coil remains bent, it is possible to solve problems such as making it difficult to handle the coil in the next step and coil consumers, and reducing yield by cutting off the bent portion.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a diameter expansion / contraction mechanism of a winding reel and a control system thereof according to the present invention.

FIG. 2 is a graph showing the relationship between the strip plate thickness and the diameter expansion amount of the winding reel.

3A and 3B are schematic diagrams illustrating an example of a strip winding method according to the present invention. FIG. 3A is during initial winding, FIG. 3B is at the time when initial winding is completed, and FIG. Respectively.

FIG. 4 is a graph showing the relationship between the strip thickness and the initial number of windings on a winding reel.

[Explanation of symbols]

 1 Reel for winding S Strip 9 Belt trapper

Claims (2)

[Claims] 1. A plate thickness of 1.2-rolled by a hot finish rolling mill.
When winding a strip in the range of 10.0 mm into a coil, perform the initial winding for one additional round while guiding the strip tip to the outer circumference of the winding reel with a belt wrapper, and immediately after that, set according to the strip plate thickness in advance. The coil winding method is characterized in that the diameter of the winding reel is increased by an amount corresponding to the reel expansion amount and the winding is continued by the belt wrapper method. 2. A plate thickness of 1.2 to 1 rolled by a hot finish rolling mill.
When winding a strip in the range of 10.0 mm into a coil, initial winding is performed while guiding the strip tip to the outer circumference of the winding reel with a belt wrapper, and the initial winding number is set in advance according to the strip plate thickness. A coil winding method characterized in that, when a certain number of windings is reached, the diameter of the winding reel is expanded by a certain amount and the winding is continued by a belt wrapper method.