JPH07290141A - Winding control method for metal strip - Google Patents

Abstract

(57) [Abstract] [Purpose] Correcting the effect of slip between the winding shaft and the steel strip, which changes depending on the winding conditions, and improves the alignment accuracy between the stepped portion of the stepped sleeve and the steel strip tip. . [Structure] In a winding control method for a steel strip, in which a steel strip is wound around a winding shaft 3 equipped with a stepped sleeve and wound in a coil shape, the stepped portion of the stepped sleeve and the tip of the steel strip 1 are aligned. The target position at that time is corrected according to the winding condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for winding a metal strip such as a steel strip by winding a stepped rubber sleeve on a winding shaft.

[0002]

2. Description of the Related Art In a winding equipment such as a tension reel for winding a metal strip such as a steel strip (hereinafter, a steel strip will be representatively described) around a coil under tension, a winding shaft for taking out the coil. Since it is necessary to reduce the diameter, there is no choice but to have a structure in which a gap is formed on the surface during winding.
Since the winding shaft is made of metal, if you apply tension to wind it, the pattern of the gap will be transferred to the steel strip, so especially when winding a thin final product,
Attach a thick rubber sleeve to the take-up shaft, wrap the take-up shaft with an endless belt called a belt wrapper, and wind the steel strip tip around the surface of the rubber sleeve several times, then apply tension to take it up. It is normal to start. FIG. 3 is a schematic view showing a winding state, 1 is a steel strip, 3 is a winding shaft, and S is a rubber sleeve.

The rubber sleeve is essentially a simple cylindrical one with a uniform thickness. However, due to the material and size of the steel strip to be wound up, the thickness of the steel strip and the shape defect such as the warp of the tip end cause As shown schematically in FIG.
The step or shape of the tip end portion is transferred to the steel strip at the winding start point and the overlapping start position A thereafter, and a surface bending phenomenon occurs, causing defects called so-called reel marks or top marks. The reel mark is 100 along the length of the steel strip.
It can reach ~ 150 m.

As a countermeasure against this, a stepped sleeve has been developed in which a step portion corresponding to the plate thickness of the front end portion of the steel strip is formed on the surface of the rubber sleeve in the axial direction. As an example, the actual Kaihei 1-962
What is described in Japanese Patent Publication No. 14 is shown in FIG. In this figure, S is a rubber sleeve and G is a stepped portion. Since the tip end portion of the steel strip is housed inside the original outer diameter of the rubber sleeve S, the depth D and the length L corresponding to the plate thickness are unidirectional. An inclined step portion is formed at the bottom.

Although such a stepped sleeve has a temporary effect, it is necessary to adjust the position of the front end of the steel strip within a range of, for example, +20 mm with respect to the step at the start of winding. Time alignment takes time, which is an obstacle to automation of work. In a continuous strip processing line, it is especially important for productivity to make the strip down time as close to zero as possible, and it is strongly desired to automate and quickly perform the alignment during strip running. It was

Japanese Unexamined Patent Publication No. 5-169140 proposes a method for controlling the winding of a steel strip which enables highly precise alignment between the front end of the steel strip and the stepped sleeve step. This will be described with reference to FIGS. 5 is a schematic configuration diagram of the periphery of the winder, FIG. 6 is a flowchart, 1 is a steel strip, 2 is a transport roll, 3 is a winding shaft equipped with a stepped sleeve, 4 is a measuring roll, and 5 is a light projecting / receiving light. Type photo switch, 6 is a reflected light type photo switch, 20 is a drive motor for the transport roll 2, 21 is a speed detector for the transport roll 2, 30 is a drive motor for the take-up shaft 3, 31 is a take-up shaft 3
Speed detector, 100 is a controller.

According to this method for controlling the winding of the steel strip, when the winding of the steel strip 1 is started on the winding shaft 3 having the stepped sleeve, the stepped portion of the stepped sleeve is pre-wound. From the start to the time when the tension is established, the slip between the winding shaft 3 and the steel strip 1 and the acceleration time from the start of rotation of the winding shaft 3 to the lead peripheral speed higher than the normal conveying speed are set. It is stopped at the rotation position considered, and when the tip position of the steel strip 1 to be conveyed reaches a predetermined position according to the conveyance speed, the winding shaft is started, and the tip position of the steel strip 1 and the step It is characterized in that the winding shaft is controlled to a normal peripheral speed when the positional relationship with the step portion of the sleeve is matched.

This will be described repeatedly with reference to the flow chart of FIG. 6. Step 3 (labeled as S3, the same applies hereinafter)
The position of the stepped portion (stepped point in FIG. 6) of the stepped sleeve is detected with, and in steps 4 and 5, from the stepped point (overlapping position with the front end of the steel strip, A in FIG. 3), (θ ₀ + θ ₁ ) Stop the step in front. Where θ ₀ is the rotation angle of the winding shaft 3 from the start of winding of the steel strip to the establishment of tension, θ _0
1 is the rotation angle of the winding shaft 3 when the peripheral speed of the winding shaft 3 changes from 0 to f · v ₁ .

Then, in step 6, the conveying speed of the steel strip 1 is set to v ₁
Then, the tip end of the steel strip is detected by the photo switch 5, tracking is performed in step 7, and the lead rate is f (f ≧ 1) in step 8 and the rotation speed of the winding shaft 3 reaches f · v _1. Based on T ₁ , m _t = L−v ₁ · T ₁ , where L is the distance between the photoswitch 5 and the winding shaft 3, and the steel strip 1 is wound on the winding shaft 3. Step
At the time of 10 times, the steel strip 1 is wound around the winding shaft for N turns, the tip of the steel strip 1 is aligned with the stepped portion, and the tension is established. Then, in steps 11 and 12, while controlling the rotation of the winding shaft according to the winding number, The winding of the belt is completed.

[0010]

[Patent Document 1] FIG.
It is a graph showing the distribution of the front end position of the steel strip as a result of carrying out the winding method described in Japanese Patent Publication No. 40, in which an error of about 70 mm at maximum occurs in both the advance direction and the delay direction. Therefore, the results of an investigation of the number of revolutions of the winding shaft from the start of winding to the establishment of tension using two types of outer diameter of the winding shaft, 610 mm and 508 mm, for those with and without oil applied to the steel strip surface, This is shown in FIGS.

As described above, the slip generated between the winding shaft and the steel strip from the winding of the front end of the steel strip to the establishment of the tension is not always constant, but varies depending on the material, size, treatment method, etc. of the steel strip. It causes the error of the tip alignment,
There is a problem that the effect of the stepped sleeve is not exhibited. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a method for controlling the winding of a steel strip, which aligns the stepped portion of the stepped sleeve and the tip of the steel strip with high accuracy while running. To do.

[0012]

According to a first aspect of the present invention, there is provided a method for controlling winding of a metal strip, which comprises winding a metal strip around a winding shaft having a stepped sleeve and winding the metal strip into a coil. A method of controlling winding of a metal strip, comprising: correcting a target position when aligning the stepped portion of the attached sleeve and the tip of the metal strip according to the winding condition.

Further, the present invention according to claim 2 is a method of controlling winding of a metal strip, in which a metal strip is wound around a winding shaft equipped with a stepped sleeve and wound in a coil shape. Increase the speed of the stepped part from the start of the winding of the metal strip to the establishment of tension and the slip between the winding shaft and the metal strip, and from the start of rotation of the winding shaft to the lead peripheral speed faster than the normal transfer speed. It is stopped at a rotation position considering time, and when the tip position of the metal strip reaches a predetermined position according to the transport speed, the winding shaft is activated, and the tip portion of the metal strip and the stepped portion of the stepped sleeve are activated. In the winding control method of the metal strip, the winding shaft is controlled to the normal peripheral speed when the positional relationship with The target position when the match the positional relationship between the stepped portion of the end and the stepped sleeve, a winding control method for a metal strip, characterized in that corrected in accordance with the winding conditions.

[0014]

[Operation] When winding a steel strip around the winding shaft, if the transport speed of the steel strip is v ₁ , the peripheral speed of rotation of the winding shaft is slightly higher than this, and is multiplied by the lead rate f (f ≧ 1). It is usual to set the lead circumferential velocity f · v ₁ . Therefore, from the start of winding to the Nth turn when tension is established, v ₁ and f
・ There is a speed difference from v ₁ . In order to align the front end of the steel strip and the stepped portion of the stepped sleeve during running, the slip circumference between N turns is the amount of displacement from the stepped portion. This means that it is better to set the target point as the point advanced N turns from the stepped portion of the stepped sleeve.

On the other hand, as described above, the slippage between the winding shaft and the steel strip from the winding of the steel strip to the establishment of the tension is not constant, but varies depending on various conditions such as the material, size and treatment method of the steel strip. According to the present invention, the number of turns N from the start of winding to the establishment of tension under these various conditions is set, and if the stepped portion of the stepped sleeve is used as the origin, the "origin-
Since the point of "N" is set as the alignment target, it is possible to prevent the positional deviation that occurs due to the difference in the various conditions.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of the periphery of the winder, and the same reference numerals are used for those common to FIG. 5 above. 100 is a control device and 200 is a process computer. Information about the conditions such as the material, dimensions, and processing method of the steel strip can be obtained by the process computer 20.
It is provided from 0 to the control device 100.

The steel strip 1 is transported by a transport roll 2 at a speed v ₁ and is wound on a winding shaft 3 having a stepped sleeve mounted thereon. The tip of the steel strip 1 is detected by the change in the light-shielding state by the light-transmitting and receiving type photo switches 5 installed above and below the traveling path of the steel strip 1, and the transport speed v ₁ of the transport roll 2 is set to the steel strip 1. It is detected by the measuring roll 4 which is in contact with and rotates, and tracking of the front end position of the steel strip is started at the time of detection by the photoswitch 5.

On the other hand, the rotation speed of the transport roll 2 is detected by a speed detector 21 connected to the rotation speed of the control roll 100.
And is fed back to the drive motor 20 of the transport roll and held at a constant value. The transport speed v ₁ detected by the measuring roll 4 is also input to the control device 100. Next, in order to detect the stepped portion of the stepped sleeve mounted on the winding shaft 3, for example, the outer circumference of the sleeve is colored black, and the stepped portion is provided as a mirror surface with different reflectances and is installed orthogonal to the reflective surface. The step portion is detected by the reflected light type photo switch 6 and is input to the control device 100. Further, the rotation speed of the winding shaft 3 is determined by the speed detector 31 for the winding shaft.
Is input to the control device 100 and fed back to the drive motor 30 for the winding shaft to control the rotation of the winding shaft 3 according to the winding amount of the steel strip 1.

Here, an outline of the operation of the control device 100 will be described. First, the drive motor 30 for the winding shaft is driven and controlled, the time T _{1 at} which the peripheral speed of the winding shaft 3 changes from 0 to f · v ₁ (f is the above-mentioned lead rate) is measured, stored, and then wound. Stop axis 3. Next, the drive motor 20 for the transport roll is driven to rotate the transport roll 2. Then, the steel strip 1 is transported, and the drive motor 20 of the transport roll is controlled so that the transport speed detected by the measuring roll 4 becomes v ₁ .

Subsequently, for example, when the stepped portion of the stepped sleeve is detected by the photo switch 6 of the reflected light system and the "stepped point" which is the overlapping position with the tip of the steel strip is used as the origin, θ ₀ + θ ₁ ) The drive motor 30 of the winding shaft is controlled so that the stepped portion of the stepped sleeve is positioned in front and stopped. Here, θ ₀ is the rotation angle of the winding shaft 3 from the start of winding the steel strip to the establishment of the tension, and the upper process computer 200 also provides information about various conditions such as the material, size, and processing method of the steel strip. And control device 10
It is a correction value preset by detecting the corresponding value from the table stored in 0. Also, θ ₁ is the winding shaft 3
This is the rotation angle of the winding shaft 3 from when the peripheral speed of 0 to f · v ₁ .

As described above, tracking of the front end position of the steel strip is started from the time of detection by the photo switch 5 of the light emitting and receiving system, and the standby shaft 3 of the winding shaft 3 has the photo switch 5 at the front end of the steel strip 1. start driving motor 30 of the m _t = L-v winding shaft at the time of the progress only ₁ · T ₁ from the light shielding position, maintaining the peripheral speed of the f · v ₁ to the number of winding is N turns, it After that, the rotation of the winding shaft 3 is controlled at a normal peripheral speed according to the increase in the number of turns.

FIG. 2 shows variations in the position of the front end of the steel strip as a result of winding the steel strip by the winding control method of this embodiment. The variation was extremely small compared to FIG. 7, and the total number was approximately +10 mm, and the tip portion could be accommodated in the stepped portion of the stepped sleeve.

[0023]

According to the present invention, it is possible to align the tip end portion of the steel strip and the step portion of the stepped sleeve with high accuracy, and the effect of the stepped sleeve is exerted to reduce the reel mark. , Produces excellent effects.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a device according to an embodiment of the present invention.

FIG. 2 is a graph showing an effect according to an embodiment of the present invention.

FIG. 3 is a conceptual diagram illustrating a reason for generating a reel mark according to the present invention.

FIG. 4 is a front view showing a stepped sleeve according to the present invention.

FIG. 5 is a schematic configuration diagram of a device showing a conventional technique.

FIG. 6 is a flow chart showing a conventional technique.

FIG. 7 is a graph showing a problem with a conventional technique.

FIG. 8 is a graph showing the reason for the occurrence of problems in the conventional technique.

FIG. 9 is a graph showing the reason for the occurrence of problems in the prior art.

[Explanation of symbols]

 1 Steel strip 2 Conveying roll 3 Winding shaft 4 Measuring roll 5 Photo switch (light emitting and receiving system) 6 Photo switch (reflected light system) 20 Drive motor (conveying roll) 21 Speed detector (conveying roll) 30 Driving motor (winding) Take-up shaft 31 Speed detector (rewinding shaft) 100 Control device 200 Process computer S Rubber sleeve G Step

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshinori Kawashima, 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture, Kawasaki Steel Co., Ltd. Chiba Works (72) Koji Masumi, 1 Kawasaki-machi, Chuo-ku, Chiba, Chiba Prefecture Kawasaki Chiba Steel Works, Ltd.

Claims (2)

[Claims] 1. A method of controlling winding of a metal strip, wherein a metal strip is wound around a winding shaft equipped with a stepped sleeve and wound in a coil shape, wherein a step portion of the stepped sleeve and a tip of the metal strip are aligned. A method for controlling winding of a metal strip, which comprises correcting a target position when performing winding according to a winding condition. 2. A method of controlling winding of a metal strip, which comprises winding a metal strip around a winding shaft equipped with a stepped sleeve and winding the metal strip into a coil, wherein the step of the stepped sleeve starts winding the metal strip. From the take-up shaft to the metal strip from the tension to the establishment of tension,
The start position of the metal strip is stopped at a rotation position that takes into consideration the acceleration time from the start of rotation of the winding shaft to the lead peripheral speed faster than the normal transfer speed, and the tip position of the metal strip is at a predetermined position according to the transfer speed. When the winding shaft is started, the winding shaft is started, and when the positional relationship between the tip of the metal strip and the stepped portion of the stepped sleeve is matched, the winding shaft is controlled to a normal peripheral speed. In the winding control method, a target position for matching the positional relationship between the tip of the metal strip and the stepped portion of the stepped sleeve is corrected according to the winding condition, and the winding control method for the metal strip is described. .