JPH067839A - Winding method for steel strip - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a method of winding a steel strip that does not cause a top mark flaw by using a mandrel having a stepped sleeve as an exterior. [Structure] When the steel strip 1 is wound by using the mandrel 6 having the stepped sleeve 10 as an exterior, a tip touch sensor 12 is provided on a stepped portion 11 of the stepped sleeve 10 to provide a tip 1a of the steel strip 1.
Since the tip position detecting device 18 detects the time point when the steel strip 1 touches the tip touch sensor 12, the motor 5 is driven by this detection signal to start winding the steel strip 1 by the mandrel 6, so that the steel strip 1 It is possible to position the tip end 1a of the slab on the stepped portion 11 and wind up the steel strip so that the top mark flaw is not generated.

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 steel strip.

[0002]

2. Description of the Related Art Conventionally, a steel strip rolled by a cold strip mill or the like has a pinch roll 2, a deflector roll 3, a threading table 4 as shown in FIG.
It is wound up by a cylindrical mandrel 6 which is rotated by a motor 5 via a belt manipulator 6 and the tip 1a of the steel strip 1 is guided by a belt wrapper 8 formed by winding a belt 7b around a plurality of belt pulleys 7a. And it is taken up smoothly.

By the way, when the steel strip 1 is relatively thick, as shown in FIG. 4, the second and subsequent steel strips 1 overlapping the tip 1a of the steel strip 1 are bent to form a plate, which is called a top mark. Defects 9 were generated, and the flatness of the steel strip was impaired, which caused the yield to deteriorate. This top mark flaw 9
The larger the plate thickness of the steel strip 1, the larger and longer the transfer will be.

As a method of preventing such a top mark flaw 9, there is a method of winding a steel strip as disclosed in Japanese Patent Laid-Open No. 2-263515. In this method, as shown in FIG. 5, a mandrel 6 is provided with a stepped sleeve 10 having a step portion 11 and the step portion 11 is covered with a tip 1 of a steel strip 1.
When a is brought into contact with and wound up, the circumferential position detecting portion provided at the end of the stepped sleeve 10 is detected by an automatic detecting device, and the mandrel 6 is rotated based on the detected position to make a step. After setting the part 11 at a predetermined position, the tip 1a of the steel strip 1
It is said that the top mark flaw 9 can be surely prevented by contacting the step portion 11 with the step portion 11 and winding it up.

[0005]

However, when the stepped sleeve 10 is used, the tip 1a of the steel strip 1 is used.
Is difficult to align with the stepped portion 11. That is, when measuring the feed amount of the steel strip 1 with the automatic detection device,
Due to the slack that occurs when the steel strip 1 enters the threading table 4, an error with a variation of about ± 25 mm is usually generated, and the top mark flaw 9 is not always guaranteed only by such tracking of the steel strip 1. It has the drawback that it cannot be prevented.

An object of the present invention is to provide a method of winding a steel strip which solves the above-mentioned problems of the prior art.

[0007]

SUMMARY OF THE INVENTION The present invention is a method of winding a steel strip using a mandrel having a stepped sleeve as an exterior so as not to generate top mark flaws, the step being provided on the stepped portion of the stepped sleeve. A method of winding a steel strip is characterized in that the tip position of the steel strip is detected by using the tip touch sensor, and the steel strip is started to be wound by this detection signal.

[0008]

[Operation] According to the present invention, the tip touch sensor is provided on the stepped portion of the stepped sleeve, and the mandrel is rotated when the tip of the steel strip comes into contact with the tip touch sensor. The tip can be surely positioned at the step portion, whereby the steel strip after the second winding can be wound up without any step.

[0009]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view showing an embodiment of the present invention, and the same members as those in the conventional example are designated by the same reference numerals.
In the figure, reference numeral 12 is a tip touch sensor for detecting the tip 1a of the steel strip 1. As shown in FIG. 2 (a), a part of the stepped sleeve 10 on the mandrel 6 is hollowed out. Attached to the hole 13. As shown in FIG. 2 (b), the tip end touch sensor 12 is composed of two metal plates 14 and 15 and a spring 16 interposed therebetween, and the metal plate 14 on the outer surface side is formed on the stepped sleeve 10. For example, it is fixed with an adhesive, while the metal plate 15 on the inner surface side is fixed so as to come into contact with the surface of the mandrel 6.

Reference numeral 17 is a touch roll, which is a pinch roll 2.
And the deflector roll 3 are attached so as to contact the steel strip 1. Reference numeral 18 denotes a tip position detecting device, one end of which is connected to the mandrel 6 and the touch roll 17 with lines 19 and 20 connected via, for example, a slip ring,
When the tip 1a of the steel strip 1 reaches the tip touch sensor 12, it has a function of detecting that the lines 19 and 20 are in a conductive state and transmitting a start signal to the motor 5.

Next, the operation will be described. First, the stepped sleeve 10 is stopped in a state in which the stepped portion 11 is aligned so that the stepped portion 11 coincides with the position of the belt pulley 7a of the belt wrapper 8. Then, when the steel strip 1 enters from the threading table 4 and enters the stepped portion 11 of the stepped sleeve 10, the tip end touch sensor 12 operates and comes into contact with the mandrel 6.

On the other hand, since the touch roll 17 is in contact with the steel strip 1, the tip position detecting device 18 operates to detect that the tip 1a of the steel strip 1 has reached the stepped portion 11 of the stepped sleeve 10. . Therefore, the tip position detecting device 18 outputs a start signal to the motor 5 to drive the mandrel 6, and the steel strip 1
To start winding. Steel strip 1 thickness 1.0 mm x width 12
The method of the present invention was applied when winding the 00 mm SPCC material.
The stepped sleeve 10 used at this time had a width of 1600 mm x an outer diameter of 508 mmφ x an inner diameter of 455 mmφ, the step portion 11 was 1.0 mm, and the tip touch sensor 12 had a dimension of 5.0 mmφ. I was able to.

In the above embodiment, the tip touch sensor 12 is described as having a dimension of 5.0 mmφ. However, if the tip touch sensor 12 is too large, the steel strip 1
If there is electrical continuity while entering the stepped portion 11, it may not be possible to prevent top mark flaws. Therefore, it has been experimentally determined that a stop accuracy within 10 mm is required to prevent top mark flaws, and therefore, it is desirable that the tip touch sensor 12 has a dimension within 10.0 mmφ.

Further, even if the mandrel 6 is activated, a slight time lag will occur in order to reach a steady winding speed, and if the steel strip 1 enters at a high speed, a large loop will occur on the threading table 4. Because it will be
The approach speed of the steel strip 1 is preferably 10 mpm or less.

[0015]

As described above, according to the present invention, even if a steel strip is wound using a stepped sleeve, it is possible to perform stable winding without a top mark flaw, thereby improving the product yield. Can be realized.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

2A and 2B are a front view and a sectional view taken along the line AA of FIG. 2, showing a mounting state of a tip end touch sensor used in the present invention.

FIG. 3 is a side view showing a conventional example of a steel strip winding machine.

FIG. 4 is a partial side view illustrating a top mark flaw.

FIG. 5 is a side view showing a conventional example of top mark flaw prevention.

[Explanation of symbols]

 1 Steel strip 2 Pinch roll 3 Deflector roll 4 Threading table 5 Motor 6 Mandrel 8 Belt trapper 9 Top mark 10 Stepped sleeve 11 Step portion 12 Tip touch sensor 14, 15 Metal plate 16 Spring 17 Touch roll 18 Tip position detection device 19, 20 lines

Claims (1)

[Claims] 1. A method of winding a steel strip so as not to generate top mark flaws by using a mandrel having a stepped sleeve as an exterior, wherein a tip touch sensor provided on a stepped portion of the stepped sleeve is used to make steel. Detects the tip position of the band,
A method of winding a steel strip, characterized in that the winding of the steel strip is started by this detection signal.