JP2558030B2 - Winding control method for steel strip - Google Patents

Description

Detailed Description of the Invention

[0001]

[Industrial field of use] When controlling winding of a steel strip by using a stepped sleeve on a winding reel of the steel strip, winding of the steel strip prevents a scratch caused by a step difference in the initial strip of the steel strip. The present invention relates to a take control method.

[0002]

2. Description of the Related Art Generally, when a steel strip is wound on a reel, there is a problem that the first few windings cause a pressing flaw due to a step at the beginning of winding the steel strip, resulting in a reduction in product yield.
On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 2-263515, by using a stepped sleeve as shown in FIG. 4 and winding up the step portion in accordance with the tip of the steel strip,
A method has been proposed in which the stepped portion due to the steel strip is eliminated, and the pushing flaw of the steel strip coil inner winding due to the steel strip step can be prevented.

[0003]

However, in the above-described conventional method, when winding the steel strip, it is necessary to temporarily stop the steel strip by setting the winding speed to zero, or to remarkably reduce the rolling speed. This will hinder the cycle time when switching reels. Further, there is an unsolved problem that the tension at the time of winding the steel strip around the reel cannot be sufficiently secured and a loose coil is generated in the initial inner diameter portion.

Therefore, the present invention has been made in view of the above-mentioned unsolved problems of the prior art, and detects the leading end of a steel strip, tracks the position of the leading end of the steel strip based on the steel strip transport speed, and reels. Based on the detection of the stepped portion of the stepped sleeve mounted on, and the number of turns of the steel strip winding of the reel until the lead speed and winding tension are established during reel winding,
An object of the present invention is to provide a method of controlling winding of a steel strip that enables highly precise alignment of the running steel strip tip and the stepped sleeve step by controlling the reel rotation speed and angle.

[0005]

In order to achieve the above object, a method of controlling the winding of a steel strip according to the present invention is a method of winding a steel strip on a winding reel equipped with a step sleeve. the control method, when starting winding the strip on the take-up reel, matched with the step portion of the Haganetai tip and the stepped sleeve from winding start of the pre-Me strip until the tension established in the strip The stepped three is set at a rotation position in consideration of the amount of slippage between the take-up reel and the steel strip to be performed and the speed-up time from the start of rotation of the take-up reel to the lead peripheral speed higher than the normal transfer speed .
When the tip of the steel strip to be conveyed reaches a predetermined position according to the conveyance speed, the take-up reel is started to accelerate the lead peripheral speed to increase the tension. The feature is that the take-up reel is controlled to the normal peripheral speed at the time of establishment.

[0006]

According to the present invention, when starting winding the strip on the take-up reel, the stepped portion of the Haganetai tip and the stepped sleeve from winding start of the pre-Me strip until the tension established in the strip The stepped position is set at the rotation position in consideration of the amount of slippage between the take-up reel and the steel strip that makes the same and the speedup time from the start of rotation of the take-up reel until the lead peripheral speed higher than the normal transfer speed is reached .
When the stepped portion of the sleeve is stopped and the tip position of the steel strip to be conveyed reaches a predetermined position according to the conveyance speed,
By starting the take-up reel and increasing the lead peripheral speed, the positional relationship between the tip end position of the steel strip and the stepped portion of the stepped sleeve is automatically matched when tension is established. By controlling the take-up reel to the normal peripheral speed, it is possible to perform highly accurate alignment between the front end portion of the steel strip and the stepped portion of the stepped sleeve and to maintain the tension of the steel strip.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention. In FIG. 1, 1 is a steel strip, which is a transport roll 2.
Is conveyed at a speed v ₁ and is wound onto a reel 3 having a stepped sleeve 7 whose rotation is controlled. At the tip of the steel strip 1, for example, light emitting and receiving type photoswitches 5 are installed above and below the path through which the steel strip is conveyed, and the change in the light shielding state is detected. Is detected by the measuring roll 4 rotating in contact with the steel strip, and the tip position of the steel strip from the time of detection by the photoswitch 5 is tracked. The rotation speed of the transport roll 2 that transports the steel strip 1 is detected by the transport roll speed detector 21 attached to the transport roll 2 and input to the control device 100, and the transport roll drive motor 20 that drives the transport roll 2 is detected. It is feedback-controlled and kept constant by the control device 100. In addition, the detection speed v ₁ by the measuring ring 4 is also controlled by the control device 10.
Input to 0.

Next, in order to detect the stepped portion of the stepped sleeve 7 mounted on the reel 3, for example, the outer circumference of the sleeve is made black, and only the stepped portion is made to be a mirror surface so that the reflectance is different and the reflective surface is The step portion is detected by the reflection type photo switch 6 installed at right angles, and is input to the control device 100.
Further, the rotation speed of the reel 3 is the reel speed detector 31.
Is detected and input to the control device 100 and fed back to the reel drive motor 30, and the control device 100 controls the rotation of the reel 3 according to the winding amount of the steel strip.

Here, an outline of the operation of the control device 100 will be described. First, the reel drive motor 30 is drive-controlled to measure and store the time T _{1 at} which the peripheral speed of the reel 3 changes from 0 to fv ₁ , and then the reel 3 is stopped. Next, the transport roll drive motor 20 is driven to rotate the transport roll 2. Then, the steel strip 1 is transported and the transport roll driving motor 2 is set so that the detection speed of the measuring roll 4 becomes v _1.
Control 0.

Next, the step portion of the stepped sleeve 7 is detected by, for example, the reflection type photoswitch 6, and when the stepped point is set as the origin as described later,-(θ ₀ + θ)
_{In 1} ), the reel drive motor 30 is controlled so as to stop positioning the stepped point of the stepped sleeve 7. And steel strip 1
Starts tracking from the time when the light emitting / receiving type photo switch 5 is shielded from light at the speed v ₁ .

And, the reel 3 waiting is the steel strip 1
When the tip of the reel advances from the photo switch 5 by m _t , the reel driving motor 30 is driven to move the reel 3 to the conveying speed of the steel strip 1.
The degree v fast lead peripheral velocity fv ₁ than ₁ and maintained until the strip turns is <br/> N times, then in accordance with an increase in the number of turns, controls the rotation of the reel 3. Next, the principle that the tip of the steel strip 1 and the stepped portion of the stepped sleeve coincide with each other will be described below. First, from the steel strip detection point on the photo switch 4, the reel 3
L is the distance to the point where the number of winding turns of the steel strip 1 on the stepped sleeve is increased, that is, the stepping point (see FIG. 3), the transport speed of the steel strip 1 is v _1, and the initial rotation circumference of the reel ₃ is The lead speed f (f ≧ 1) when the speed is the conveying speed v ₁ of the steel strip 1.
When the lead circumferential velocity fv ₁ is multiplied by, the number of steel strip turns at the time of tension probability due to reel winding of the steel strip 1 is N, the outer diameter of the stepped sleeve is D, and the thickness of the steel strip 1 is t, The feed length m _SN of the steel strip 1 while the reel 3 rotates N times is as follows.
It is expressed by equation (1).

M _SN = πD + π (D + 2t) + π (D + 4t) + ... = πDN + πN (N-1) t …………………… (1) Reel rotation circumference while the reel 3 rotates N times. When the length is m _RN , a speed difference between v ₁ and fv ₁ occurs for N turns, and tension is established at N turns. Next, the reel rotation slip circumference α when aligning the sleeve step with the steel strip tip is
It is expressed by equation (2).

M _SN / v ₁ = (m _RN + α) / fv ₁ (2) Here, m _RN = πDN, and from equations (1) and (2), α = Fm _SN- m _RN = πN [f {D + (N-1) t} -D] (3) When α is represented by the reel angle θ ₀ (deg), θ ₀ = α / πD × 360 = N [f {D + (N-1) t} -D] · 360 / D (4) Next, let T ₁ be the time when the reel peripheral speed reaches 0 → fv ₁ , and the rotation angle between them. θ ₁ (specific to the equipment),
In consideration of θ ₀ obtained by the equation (4), when the stepped point is the origin, the reel driving motor 30 stops positioning the stepped point of the stepped sleeve 7 from the origin to − (θ ₀ + θ ₁ ). Make it stand by.

Further, the reel 3 that is waiting, the tip of the steel strip 1, performs a starting rotation of the reel 3 when m _t advanced from the photo switch 5, the steel strip 1 by the speed of fv ₁ The positions of the tip and the stepped point of the stepped sleeve 7 can be matched. Here, m _t = L−v ₁ T ₁ . Further, the positional relationship between the leading end position of the conveyed steel strip and the stepped point of the stepped sleeve is uniquely obtained by the above relational expression, so that the reel rotation angle correction control is sequentially performed based on the tracking of the steel strip leading end portion. As a result, it is possible to perform highly accurate alignment between the front end of the steel strip and the stepped portion of the stepped sleeve 7.

Next, the operation of the above embodiment will be described with reference to the flow chart of FIG.
Chart will be explained. First, in step S1
The peripheral speed of the reel 3 is 0 → fv₁Time to reach T₁Measure
And then, at step S2, the time T₁Into memory
After storing, the reel 3 is stopped. Then, step S
3 controls the reel drive motor 30 to control the stepped three
The stepped point of the switch 7 is set by, for example, a reflection type photo switch 6.
To detect. Then, in step S4,
Based on reel angle θ₀Is calculated, and the step S5 is performed.
If the stepped point is the origin, then − (θ₀
+ Θ ₁) Position by controlling the reel drive motor 30
Stop and wait. Where θ₁Is a value specific to the equipment
Is. Then, in step S6, the transport roll drive motor
20 is detected and detected by the measuring roll 4.
Transport speed is v₁And Then, in step S7, for example,
The tip of the steel strip 1 can be
Detect passing (start tracking).

[0016] Then, in step S8, the tip of the steel strip 1 is whether the m _t proceeds from the photo switch 5 m _t
= L−v ₁ T ₁ is determined, and if m _t is not reached, the process returns to step S8, and if m _t is reached, the process proceeds to step S9. In step S9, the reel 3 is started to rotate and the peripheral speed of 0 → fv ₁ is increased and held at this speed.

Next, it is determined whether the steel strip 1 was taken N turns wound on the reel 3 at a peripheral speed fv ₁ in step S10. If it has not been wound up, the process returns to step S10.
If it is wound N turns, the tip of the steel strip 1 slips by the rotation angle (θ ₀ + θ ₁ ) and the tip of the steel strip 1 and the stepped point of the stepped sleeve 7 can be aligned with each other. Is confirmed. After winding N turns in step S10, the reel drive motor 30 controls the rotation of the reel 3 in accordance with the number of windings on the reel 3 in step S11 to continue winding the steel strip 1. In step S12, it is determined whether or not the winding is completed. If it is not completed, the process returns to step S11,
If the winding is completed, the process proceeds to step S13 and the rotation of the reel 3 is stopped. Then, in step S14, it is determined whether or not the winding of all the steel strips is completed, and if not completed, the process returns to step S3 to repeat the above operation. If all the steel strips have been finished, the flowchart of FIG. 2 is finished.

It should be noted that in the above embodiment, the conveyance amount of the steel strip was detected by rotating the measuring roll 4 in contact with the steel strip, but the present invention is not limited to this, and the conveyance roll speed attached to the conveyance roll 2 is not limited to this. It may be performed by the detector 21.

[0019]

As described above, according to the method for controlling the winding of a steel strip according to the present invention, in the method for controlling the winding of a steel strip for winding the steel strip on the winding reel having the stepped sleeve, the steel strip when you start winding on the take-up reel, the pre-Me
A take-up reel that matches the tip of the steel strip with the stepped portion of the stepped sleeve from the start of winding the steel strip to the time when the tension of the steel strip is established.
And the stepped portion of the stepped sleeve at the rotational position considering the amount of slippage between the steel strips and the speedup time from the start of rotation of the take-up reel to the lead peripheral speed faster than the normal transfer speed. > Stop it and start the take-up reel when the tip of the steel strip to be conveyed reaches the predetermined position according to the conveyance speed.
Was said to accelerated until the read peripheral speed, by controlling the take-up reel when the tension established in the normal peripheral speed, can be made consistent with the tip and the stepped sleeve stepped portion of the steel strip with high precision, There is an effect that it is possible to prevent pushing scratches due to the steel strip end portion of the initial inner winding portion of the steel strip coil without restricting the cycle time of switching the steel strip reel.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment.

FIG. 2 is a flowchart of an example.

FIG. 3 is a position of a step point when the steel strip 1 is wound around the step sleeve 7.

FIG. 4 is a shape view of a stepped sleeve 7.

[Explanation of symbols]

 1 Steel strip 2 Conveyor roll 3 Reel (with stepped sleeve 7) 4 Measuring ring 5 Light emitting and receiving type photo switch 6 Reflective photo switch 7 Stepped sleeve 20 Conveyor roll drive motor 21 Conveyor roll speed detector 30 Reel Drive motor 31 Reel speed detector 100 Controller

Claims (1)

(57) [Claims] 1. A take-up reel equipped with a stepped sleeve in winding control method of the strip winding the steel strip, when starting winding the strip on the take-up reel, winding the pre-Me strip From the start of attachment to the time when the tension of the steel strip is established, the slip amount between the take-up reel and the steel strip that matches the tip of the steel strip with the stepped portion of the stepped sleeve, and the normal transport speed from the start of rotation of the take-up reel The stepped portion of the stepped sleeve is stopped at a rotational position that takes into consideration the acceleration time until reaching the high lead peripheral speed, and the tip position of the steel strip to be conveyed reaches a predetermined position according to the conveyance speed. At this time, the winding reel is started to speed up to the lead peripheral speed, and when the tension is established, the winding reel is controlled to a normal peripheral speed.