JPH06328129A - Guide device for coiling steel plate - Google Patents

Abstract

PURPOSE:To reduce the fluttering and oscillating of a coil end part and to prevent the surface flaws, crimps, shape defects of a product end part by keeping an angle made between an advancing steel plate and a guide always at an adequate value. CONSTITUTION:An inlet side guide 2 of the most upstream snubber roll 1a is made rotatively movable to keep an angle made between the advancing steel plate 11 and the inlet side guide 2 always at the low angle which is quite effective on suppression of the fluttering and oscillating of the coil end part irrespective of the size of the coil. Not only a hydraulic cylinder drive system but also a chain (or wire) drive system, a motor drive system, a link system using the movement of an arm, etc., can be applied to the structure which change the angle of the inlet side guide 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide device for a winding device, for example, which winds a cold-rolled steel sheet into a coil shape, shear-cuts it while running at high speed, and presses the flutter at the tail end of the coil with a snubber roll. is there.

[0002]

2. Description of the Related Art In a continuous cold rolling mill, as shown in FIG. 2, a cold-rolled steel sheet is wound into a coil at a high speed while being cut by a running shear 7 to rapidly decelerate and stop the coil during winding.
While paying out from the winding device, the next coil repeats the work of starting winding with another winding device at the same time. As a recent trend of equipment, the shear cutting speed during running has been gradually increased for reasons such as improvement in productivity and prevention of deterioration of steel plate thickness accuracy.

By the way, the tail end of the coil has to be rapidly decelerated and stopped until it reaches a certain position below the winding coil 5a or 5b after the shear cutting during running, so that the cutting speed can be increased. Along with this, the deceleration rate also increases, and the tail end of the coil is swung around in the winding device due to centrifugal force and inertial force, causing fluttering, causing scratches and bending at the tail end, and damage to the winding equipment. Is becoming. In response to such a problem, measures have been taken to install fixed guide devices 20 and 21 as shown in FIG. 2 on each of a plurality of snubber rolls.

[0004]

However, the conventional winding guide device as described above has the following problems. (I) Since the most upstream snubber roll has a structure in which the coil is pressed around the fulcrum 10 of the arm shown in FIG. 2, the angle θ formed by the fixed guide on the snubber roll entrance side and the entering steel plate is determined by the diameter. Even if the value is set to an appropriate small value θ _{0 in} the case of the small coil 5a, θ gradually increases as the diameter of the coil increases. Therefore, particularly in the case of the large coil 5b, the fixed guide 20 is θ becomes too wide to play the role of preventing the tail end of the coil from fluttering.

(Ii) When the winding coil 5a has a small diameter, the front and rear snubber rolls come close to each other. In particular, the entrance-side fixed guide installed on the second and subsequent snubber rolls avoids interference with the arm of the snubber roll in front of the snubber roll, and attaches the fixed guide 21 so as to suppress the fluttering of the tail end of the coil, and the dense guide is closely attached. Even if they are arranged, the winding coil has a large diameter 5b, and in the state where the snubber roll is in the opening direction, the snubber roll interval is widened,
Even if the fixed guide 21 is provided, the space 22 in the shaded area in FIG. 2 is wide open, and it becomes impossible to prevent the tail end of the coil from fluttering. In view of such a problem, the present invention provides a guide device that winds a coil tail end portion of a steel sheet and smoothly guides and winds the steel sheet without bending, breaking, or the like regardless of the diameter of the winding coil. The purpose is to

[0006]

The gist of the present invention is as follows. (I) A hydraulic cylinder mechanism or a link mechanism, a chain mechanism, or a wire that interlocks with the movement of an arm of the snubber roll, which is attached to the most upstream snubber roll by a winding device having one or more snubber rolls. It is movable by a mechanism or the like, and is characterized in that the angle θ ₀ formed between the entering steel plate 11 and the guide 2 can always be maintained at an appropriate value regardless of the size of the winding coil diameter.

(Ii) An outlet guide 3a attached to each snubber roll and an inlet guide 3b attached to the next snubber roll of the snubber roll are formed in a skewer shape in the circumferential direction in the vicinity of the outer circumference of the winding coil. It is characterized in that the winding coils are constantly crossed without interfering with each other within a use range of the snubber roll from the small diameter to the large diameter to guide the steel sheet. At this time, it is possible to suppress the fluttering of the tail end portion of the coil by making the space formed by the outgoing side guide 3a, the incoming side guide 3b, and the outer peripheral surface of the winding coil that intersect with each other as narrow as possible in all coil diameters. It is preferable in terms.

[0008]

4 and 5 are explanatory views of the action of the steel sheet winding guide device according to the present invention for suppressing the flapping and whirling of the tail end of the coil. FIG. 3 illustrates a state in which the tail end portion of the strip is guided and wound by the conventional uppermost stream snubber roll fixed guide portion 20.

That is, in the case of the small-diameter coil 5a, the fixed guide 2
The angle θ ₀ between 0 and the entering steel plate 11 is small, and the tail end →
As shown in →, it is stably wound while being restrained by the fixed guide, but in the case of the large-diameter coil 5b, the angle θ ₀ ′
Becomes larger, and the tail end of the coil is no longer constrained, causing large swinging and flapping like →→.

On the other hand, as shown in FIG. 4, when the inlet side guide 2 of the most upstream snubber roll is rotatably movable, the angle formed by the entering steel plate 11 and the inlet side guide 2 is set to θ ₀ having a large guide effect in the case of the large diameter coil 5b. However, when the coil can be held, the tail end of the coil is constrained similarly to the small-diameter coil 5a, and can be stably wound up as →→. This is the action exhibited by the steel sheet winding guide device according to the first aspect.

Next, FIG. 5 clearly shows the action exhibited by the steel sheet winding guide device according to the second aspect of the present invention. The downstream guide 3a of the snubber roll and the upstream guide attached to the next snubber roll of the snubber roll. 3b and the winding coil are arranged so as to be formed in a skewered shape in the circumferential direction in the vicinity of the outer circumference of the winding coil and intersect with each other without interfering with each other, so that the tail end of the coil that has entered between both snubber rolls is always restrained. While it can be rolled up stably.

[0012]

FIG. 1 is a side view of a steel plate winding device (carousel reel) according to an embodiment. In the figure, 1a is the most upstream snubber roll, 1b is the second snubber roll, and 1c is 3
The second snubber roll, and when the winding of the small-diameter coil 5a or the large-diameter coil 5b wound around the central take-up reel 4 is completed,
The arms 12a, 12b, 12 by the hydraulic devices b, 9c.
It is pressed against the outer circumference of the coil via c and prevents the tail end of the steel plate from unraveling.

At this time, by making the inlet side guide 2 of the most upstream snubber roll 1a rotatably movable, the angle formed by the entering steel plate 11 and the inlet side guide 2 can be controlled by the flapping and whirling holding effect of the tail end of the coil. A large, low angle θ ₀ is always maintained regardless of the size of the coil.

At this time, as a mechanism for changing the angle of the entrance side guide 2, not only the hydraulic cylinder drive system shown in FIG. 6 but also a chain (or wire) drive system (FIG. 7), a motor drive system, an arm movement. It is also possible to use a link drive method (FIG. 8) using the above.

Another embodiment of the present invention is a guide device shown in FIG. 1 which comprises an outlet side guide 3a of the most upstream snubber roll 1a and an inlet side guide 3b of the second snubber roll 2, and FIG. 9 shows its details. FIG. As shown in FIG. 9, the outlet side guide 3a and the inlet side guide 3b are arranged in a skewered manner in the circumferential direction in the vicinity of the outer circumference of the winding coil 5, and do not always interfere with each other regardless of the diameter of the winding coil. I am mating.

Therefore, the flapping and whirling of the tail end portion of the coil passing between the first snubber roll 1a and the second snubber roll 1b are greatly reduced by being restrained by the guide. At this time, the guide shape may be a round bar shape shown in FIG. 9 or a rectangular cross section.
It is also possible to make the arm portion 12a of the snubber roll itself into a skewer shape as a delivery side guide and to perform the same operation.

[0017]

EFFECTS OF THE INVENTION When the present invention is carried out, flapping and whirling of the tail end portion of the coil are greatly reduced, so that surface flaws, bending, defective shape, etc. of the tail end portion of the steel sheet product can be prevented and the winding equipment can be prevented. Since the impact force against is also mitigated, there is an effect of reducing equipment failure.

Further, since it becomes possible to perform stable shear cutting and winding at a higher speed than ever before, the production capacity (equipment productivity) is improved, and conventionally, the winding speed at the center of the coil is increased. At the tail end, we are decelerating and performing shear cutting during running, but this is because the range of deceleration / acceleration becomes smaller due to the higher shear speed during running, so
There is also the effect of energy saving of the drive motor of the entire line. Further, since the product plate thickness accuracy generally improves when the rolling speed is high, it is possible to expect the effect of improving the plate thickness accuracy especially near the coil tip tail end by enabling the shear cutting during running at a high speed. .

[Brief description of drawings]

FIG. 1 is a side view of a steel plate winding guide device of the present invention.

FIG. 2 is a side view of a conventional steel plate winding guide device.

FIG. 3 is an explanatory view of an operation of a conventional type most upstream snubber roll fixing guide.

FIG. 4 is an explanatory view of the operation of the most upstream snubber roll angle variable guide of the present invention.

FIG. 5 is an explanatory view of the action of the snubber roll interlocking guide of the present invention.

6A is an explanatory view of a guide angle changing mechanism (hydraulic cylinder drive system), and FIG. 6B is a perspective view thereof.

FIG. 7 is an explanatory diagram of a guide angle changing mechanism (chain or wire drive system).

FIG. 8 is an explanatory diagram of a guide angle changing mechanism (link drive system).

FIG. 9 is a detailed explanatory diagram of a mating guide.

[Explanation of symbols]

1a, 1b, 1c Snubber roll 2 Angle variable guide 3a Interlocking exit side guide 3b Interlocking entrance side guide 4 Take-up reel 5a Small diameter coil 5b Large diameter coil 6 Coil car 7 Running shear 8 Deflector roll 9a, 9b, 9c Snubber roll drive hydraulic pressure Cylinder 10a, 10b, 10c Arm fulcrum 11 Entry steel plate 12a, 12b, 12c Arm 13 Guide angle changing mechanism 14 Coil tail end 20 Entry side fixed guide (most upstream snubber roll) 21 Entry side fixed guide (No. 2 snubber roll) 22 Conventional Coil tail end flapping possible area at the time of large diameter roll in the guide

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masakuni Kikuchi 5-3 Tokai-cho, Tokai-shi Nippon Steel Corporation Nagoya Steel Works

Claims (2)

[Claims] 1. A winding device having one or two or more movable holding rolls (snubber rolls 1) arranged in parallel with a drum for holding a tail end of a winding coil around a steel plate winding drum. The upstream guide 2 attached to the most upstream snubber roll is rotatable, and the angle formed by the entering steel plate 11 and the guide 2 can be maintained at a position having a large guide effect regardless of the diameter of the winding coil. Steel plate winding guide device. 2. A downstream guide 3a attached to the snubber roll portion and an upstream guide 3b attached to the next snubber roll portion of the snubber roll are formed in a skewed shape in the circumferential direction in the vicinity of the outer circumference of the winding coil. 2. The guide guides 3a, 3b are always arranged without interfering with each other at all snubber roll use positions from a small diameter to a large diameter of the winding coil. Steel plate winding guide device.