JP2000271641A - Method for winding strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the glutting of a strip at the outlet side of pinch rolls for winding after cutting off the rear end part of the strip wound around a mandrel at the downstream side with strip shears. SOLUTION: In a strip winding method in the case of winding the cut-off strip by the mandrel 2 at the downstream side in carousel reel type winding equipment through the pinch rolls 17 for winding after cutting off the strip fed out from a hot finish rolling mill to a prescribed length with strip shears 5, the relation among the setting winding velocity Vm of the mandrel 2 at the downstream side after cutting off the rear end part of the strip wound around the mandrel 2 at the downstream side in the carousel reel type winding equipment through the pinch rolls 17 for winding with the strip shears 5, the target velocity Vp of the pinch rolls 17 for winding at the cutting-off time and the target sheet velocity Vs of the strip just before cutting off, is regulated to Vm>Vp>Vs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to endless rolling, in which a strip fed from a hot rolling mill is cut into a predetermined length by a strip shear, and the cut strip is passed through a winding pinch roll. The present invention relates to a winding method for winding by a carousel reel type winding device.

[0002]

2. Description of the Related Art In the field of hot rolling, strips are joined upstream of a finishing mill to continuously roll the joined strips in order to improve yield and productivity. . In recent years, a carousel reel-type winding facility has been used as a winding facility for continuous hot rolling.

FIG. 2 schematically shows an example of a continuous hot rolling line in which a carousel reel type winding facility is arranged. The carousel reel type winding device comprises first and second mandrels 1,
2 and the first and second mandrels 1 and 2
The turning tracks 3 are circumferentially separated from each other so as to be able to turn so that one of them is located on the upstream side and the other is located on the downstream side. Then, for example, when the first mandrel 1 is located on the upstream side, the preceding strip S sent from the finishing mill 4 by the first mandrel 1
After winding the _first strip ₁ by a predetermined amount, the first mandrel 1 is turned to the downstream side while winding the preceding strip S ₁ , and in this state, the tail end of the preceding strip S ₁ is removed by the strip shear 5.
It has a tip of the trailing strip S ₂ to take up by the second mandrel 2 located on the upstream side in the cutting to. Incidentally, after the winding of the strip S ₁ on the downstream side is completed, the payout of the wound coil of leading strip S ₁ from the mandrel 1, the mandrel 1 is trailing strip S ₂
It is in a standby state until the leading end of the subsequent strip is wound.

[0004] (first mandrel 1 in the figure) upstream passage plate guide 6 for guiding toward the tip end of the strip S on the upstream side of the mandrel and below the upstream pass line P ₁ toward the mandrel upstream 13 is arranged, the strip (in the figure the second mandrel 2) mandrel downstream branches from the upstream side path line P ₁ to be wound on the mandrel downstream and below the downstream pass line P ₂ toward the S
Are provided. Incidentally, strip passing guide 13 serves as a lower guide against the upper guide and the downstream pass line P ₂ downstream pass line P ₂ from the upstream side path line P ₁ is located at a position which branches against the upstream pass line P ₁ ing.

Furthermore, disposed pinch rolls during the reference numeral 16 denotes a rolling mill 4 and the strip shear 5 finish in the pass line P ₁ in FIG. 2, 17 distribution on the exit side of the strip shear 5 pass line P ₁ The provided pinch roll, 18 is disposed on the outer peripheral surface side of the upstream mandrel so as to be able to approach and separate, and the upstream wrapper roll, 19 is disposed on the outer peripheral surface side of the downstream mandrel so as to be able to approach and separate. The upper and lower wrapper rolls 18 and 19 and the upper guide 14 of the downstream side plate guide are used when the first and second mandrels 1 and 2 turn on the turning track 3. The robot moves away from the turning track 3 to allow the turning.

[0006]

At [0007] the conventional mosquito Roselle reel-up apparatus, downstream of the mandrel the strip by a strip shear 5 a leading strip S ₁ during winding by (second mandrel 2 in the figure) Disconnect
Until then, the tension applied to the strip by the finishing mill 4 and the mandrel on the downstream side is released, and the preceding strip S ₁ is released from the winding pinch roll 17 arranged on the strip shear exit side as shown in FIG. There was a problem of getting stuck on the exit side. Then, in the worst case, there is a disadvantage that leading strip S ₁ is the plate is damaged caught by the leading end of the downstream side plate guides 13 at the branch position between the upstream pass line P ₁ and the downstream pass line P _2.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and after the tail end of a strip wound by a mandrel on the downstream side is cut by a strip shear, the strip is pulled out of a winding pinch roll. It is an object of the present invention to provide a method of winding a strip that can prevent looseness on the side.

[0008]

Means for Solving the Problems The present inventors, when applying a carousel reel-type winding facility in which a strip shear is arranged on the entrance side to a hot rolling line, have a conveying speed of a strip and a winding speed for a strip. The setting of the target speed of the pinch roll and the winding speed of the downstream mandrel were studied, and the present invention was completed.

That is, in the strip winding method according to the first aspect, the strip fed from the rolling mill is cut into a predetermined length by a strip shear, and the cut strip is passed through a winding pinch roll. A method for winding a strip when the strip is wound by a downstream mandrel of a carousel reel-type winding facility, wherein the strip is wound on a downstream mandrel of the carousel reel-type winding facility via the winding pinch roll. and setting the winding speed V _m of the downstream mandrel after the tail end of the strip was cut at the strip shear, the target speed V _p of the pinch rolls preparative said winding during the cutting, the plate strips of the cutting immediately before the relationship between the velocity V _S is characterized in that the _{V m> V p> V S} .

[0010] The method for winding a strip according to claim 2 is as follows.
The method according to claim 1, wherein after the cutting, the strip winding control by the downstream mandrel is switched from a winding torque control to a winding speed control.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram for explaining a strip winding method as an example of an embodiment of the present invention. FIG. 1 schematically shows a portion of a continuous hot rolling line on the downstream side of a strip shear. In this embodiment, a strip sent from a finishing mill (not shown) is used for winding. a strip shear 5, located immediately before the pinch rolls 17 and cut to a predetermined length, (in the figure the second mandrel 2) downstream of the mandrel the leading strip S ₁ via the winding pinch rolls 17 with winding by , (in the figure the first mandrel) mandrel a trailing strip S ₂ via the take-up pinch roll 17 upstream take as an example the case of winding by. Note that the carousel reel type winding equipment and the continuous hot rolling line are basically the same in configuration as those described in the conventional example (FIG. 2), and therefore, the same reference numerals are used for the overlapping parts and the description is given. Is omitted.

The second mandrel 2 located on the downstream side includes a torque detector 34 for detecting the torque of the motor 32 of the mandrel 2 as a means for pulling the strip wound around the mandrel 2 with a predetermined winding tension. A torque control device 36 that performs feedback control of the motor 32 so that the detected torque value obtained by the torque detector 34 matches the target torque value to maintain the strip tension constant; A pilot generator (PLG) 38 to be detected is provided, and a speed control device 40 that performs feedback control of the motor 32 so that a detected speed value obtained by the pilot generator 38 matches a target speed.

Similarly, the first mandrel 1 located on the upstream side also detects the torque of the motor 31 of the mandrel 1 as a means for pulling the strip wound around the mandrel 1 with a predetermined winding tension. Table 33
A torque control device 35 that performs feedback control of the motor 31 so that the detected torque value obtained by the torque detector 33 matches the target torque value to maintain the tension of the strip constant, and a rotational state of the motor 31. And a speed control device 39 that performs feedback control on the motor 31 so that the speed detection value obtained by the pilot generator 37 matches the target speed.

Further, the winding pinch roll 17 includes a pilot generator (PLG) 42 for detecting the rotation state of the motor 41 of the lower pinch roll 17a, and a speed detection value obtained by the pilot generator 42 indicating a target speed V
a speed control device 43 that performs feedback control of the motor 41 so as to coincide with _p . Winding pinch roll 1
7 is a hydraulic cylinder 4 for pressing the strip toward the lower pinch roll 17a.
4, the strip can be pressed.

Next, the downstream mandrel (the second mandrel in the figure)
From the mandrel 2), the mandrel on the upstream side (the first
To explain the case of switching to the mandrel 1), first,
Leading strip S₁With the second mandrel 2
During the operation, the strip S is
₁So that the pinch roll 17 for winding up
Press down the roll 17b with the hydraulic cylinder 44.
deep. In this state, the strip shear 5
Strip S₁Of the tail end of the
In the embodiment, the speed of the mandrel 2 after the cutting is set.
Preceding strip S by the degree control device 40₁Set winding speed
Degree V_mAnd speed control of the take-up pinch roll 17 during cutting
Target speed V for device 43_pAnd the preceding strike immediately before disconnection
Lip S ₁Plate speed to V_SThe relationship between
By computer, V_m> V _p> V_SSo that
Set.

By performing such a speed setting,
Since V _p > V _S between the strip shear 5 and the winding pinch roll 17, the strip S ₁ after cutting is subjected to a pulling force acting downstream by the winding pinch roll 17. Winding pinch roll 17 and mandrel 2
Since _Vm > _Vp , the mandrel 2 exerts a pulling force on the downstream side.

Therefore, at the exit side of the winding pinch roll 17,
Leading strip S₁Can prevent the rattling
As a result, the preceding strip S₁Is the upstream pass line
P₁And downstream pass line P_TwoDownstream at the branch position with
Prevents the plate from being damaged by being caught on the tip of the plate guide 13.
Can be stopped. After cutting, the preceding strip S
₁Tail and trailing strip S_TwoSpace between the
There is also an effect that can be removed. In addition, the plate speed V_STo
The target speed of the mandrel 2 immediately before cutting or the finishing
The actual value can be obtained from the roll rotation speed of the rolling mill.
Board speed V_SSatisfies the above conditions based on the actual value of
Sea urchin V_m, V_pShould be set.

Here, the strip S ₁ can be tensioned by the finishing mill and the mandrel 2 until the above cutting is performed, and the winding control by the mandrel 2 up to that time controls the winding torque. Is preferred. That is, the motor 32 is controlled so that the detected torque value of the motor 32 obtained by the torque detector 34 matches the target torque value.
To maintain the tension of the strip S _{1 at} a constant level, and then cut the tail end of the strip S ₁ by the strip shear 5 and then, after a while, the strip S ₁ wound into a coil is rolled into a wrapper roll. While holding down at 19, the mandrel 2 is decelerated to stop the rotation. After the rotation is stopped, the coil of the strip S ₁ is removed from the mandrel 2.

After the strip S ₁ is cut by the strip shear 5, the finishing mill and the mandrel 2 are cut.
Applying a tension to become impossible to apply tension, when to switch the winding control by the mandrel 2 to the speed control from the torque control after cutting, the strip S ₁ by the torque control until implementing cleavage between the strip S ₁ can be wound tight to and, after cutting the aforementioned the winding speed of the strip _{S 1 V m> V p>} V
It can be set to _S.

Before the cutting of the preceding strip S ₁ by the strip shear 5, the winding control of the mandrel 2 may be switched from torque control to speed control in advance.

[0021]

As is apparent from the above description, according to the first aspect of the present invention, the strip can be prevented from loosening on the exit side of the winding pinch roll. An effect is obtained that the plate can be prevented from being damaged by being caught on the tip of the downstream plate guide at the branch position between the downstream plate line and the downstream path line.

According to the second aspect of the present invention, in addition to the first aspect, it is possible to apply a tension to the strip by torque control and to wind the strip tightly until the strip is cut by the strip shear. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining a method of winding a strip as an example of an embodiment of the present invention.

FIG. 2 is a diagram schematically showing a carousel reel type winding facility.

FIG. 3 is an explanatory view for explaining a looseness of a strip on a side of a winding pinch roll.

[Explanation of symbols]

S ₁ : Leading strip S ₂ : Trailing strip 5 ... Strip shear 17: Winding pinch roll V _p ... Target speed of winding pinch roll at cutting V _S ... Target plate speed of strip just before cutting V _m ... Set winding speed of downstream mandrel after cutting

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kiyoshi Ueda 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba F-term (reference) 4E026 AA03 AA15 AA18 BA15 EA14 GA10

Claims (2)

[Claims] 1. A strip fed from a rolling mill is cut into a predetermined length by a strip shear, and the cut strip is passed through a pinch roll for winding by a downstream mandrel of a carousel reel type winding facility. A method of winding a strip at the time of winding, comprising cutting the tail end of a strip wound on a downstream mandrel of the carousel reel-type winding facility via the winding pinch roll with the strip shear. and setting the winding speed V _m of the downstream mandrel, and the target speed V _p of the pinch rolls preparative said winding during said cutting, the relationship between the plate velocity V _S of the cutting shortly before the strip V _m> V _p > V _S , wherein the strip is wound. 2. The strip winding method according to claim 1, wherein after the cutting, the strip winding control by the downstream mandrel is switched from a winding torque control to a winding speed control.