JPH04367317A - Slit device - Google Patents

Abstract

PURPOSE:To control the balance of tension between divided steel strips by holding a slit interval between the strips divided by a slitter in an arbitrary or prescribed interval. CONSTITUTION:A steel strip 11a divided by a slitter 5 coils round to a first deflector roll 18 and a tension balance roll 17, and on the other hand, a steel strip 11b coils round to a first tapered roll 13 and a second tapered roll 14 whose gradient directions are different, and a third deflector roll 15, and the steel strips 11a and 11b become the same pass line level by a second deflector roll 16. In such a way, in the delivery of a strip separating device 12, a suitable slit interval is generated between the strip ends of the strips 11a and 11b. Also, by allowing a tension balance roll 17 to ascend and descends the balance of tension between the steel strips 11a, 11b is controlled.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a slitting device for continuously dividing a steel strip into two strips in the length direction, and more specifically, the present invention relates to a slitting device for continuously dividing a steel strip into two strips in the longitudinal direction. A slit equipped with a steel strip separating device that can arbitrarily and easily create the slit spacing between the divided steel strips and further control the balance of tension between the divided steel strips in order to prevent It is related to the device.

0002

[Prior Art] A moving steel strip is continuously sheared (
A slitting device is used to divide the material lengthwise. FIG. 5 is a plan view showing an example of a conventional slitting device, and FIG. 6 is a side view. In conventional slitting equipment, in order to prevent mutual interference and overlapping of the slit steel strips, the separator ring 4 and the separator ring 6 are placed on the downstream side of the slitter 3 and on the pinch roll, as shown in FIGS. 5 and 6. 5, each of which is placed in contact with the upper or lower surface of the steel strip. In the same figure, 8 is a rewinding device, 9
is a winding device, 1 is an inlet coil, 7 is an outlet coil, 10
is a steel strip before division, 11a and 11b are steel strips after division, and the steel strips move in the direction shown by the arrow (hereinafter referred to as "prior art 1").

[0003] Furthermore, in Japanese Patent Publication No. 63-278601, as a method of creating the slit interval of the steel strip after slitting, a steel strip separation device combining two tilting rolls or one medium-high tapered roll is used. A technique using a slitting device equipped with a used steel strip separating device is disclosed (hereinafter referred to as "prior art 2").

Furthermore, a technique is already known in which each of the steel strips divided into two strips is wound up using a different winding device, thereby eliminating the tension difference that occurs between the steel strips (hereinafter referred to as "prior art"). 3).

[0005]

However, in the prior art 1, lateral force from the steel strip acts on the side surfaces of the separator rings 4 and 6 due to the influence of the tension acting on the steel strip, and the frictional force between them is reduced. This caused problems such as damage to the steel strip edges and deformation of the wound coil due to this.

[0006] In prior art 2, there were problems in that the tension distribution in the width direction of the steel strip became non-uniform, that ear waves were generated at the edges of the steel strip, and that the shape of the wound coil was deteriorated. Furthermore, there were other problems such as meandering of the steel strip due to uneven tension distribution in the width direction of the plate. In Prior Art 3, a tension difference occurs between the divided steel strips due to the difference in plate thickness, difference in mechanical properties, etc., which causes the steel strip to meander and the wound coil to be shaped like a bamboo shoot. This may cause problems such as

The problems of the prior art can be solved by winding each divided steel strip using a different winding device, but this is difficult with the existing slitting device consisting of a single winding device. . In order to solve the above problem, there is a problem in that it is necessary to modify the winding device by adding one more winding device, which is not easy to implement.

[0008] Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to make it possible to arbitrarily and easily create the slit interval between the steel strips divided by the slitter, and to make it possible to easily create the slit interval between the divided steel strips. The object of the present invention is to provide a slitting device equipped with a steel strip separating device that can control the tension balance of the steel strip.

[0009]

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a steel strip moving from an upstream side to a downstream side is continuously sheared to form two strips in the length direction. In the slitting apparatus, the steel strip separating apparatus is provided with a slitter for dividing the steel strips, and further includes a steel strip separating apparatus for creating a predetermined slit interval between the steel strips divided by the slitter, wherein the steel strip separating apparatus is arranged downstream of the slitter. a first tapered roll directed from an outer edge to an inner edge of the one side of the steel strip, the first tapered roll being arranged so as to be in contact with one surface of the one side of the divided steel strip; a second tapered roll directed from the outer edge of the steel strip on one side to the inner edge thereof, the second tapered roll being arranged downstream of the first tapered roll so as to be in contact with the other surface of the steel strip on one side; , a first deflector roll disposed downstream of the slitter so as to be in contact with one surface of the other divided steel strip; and downstream of the first deflector roll, the other of the other steel strip. a tension balance roll arranged to be in contact with the surface of the second tapered roll and a second tension balance roll arranged downstream of the second tapered roll and the tension balance roll so as to be in contact with one surface of the split steel strip on both sides. 2 deflector rolls, the first tapered roll is formed so that its diameter gradually decreases from the outer edge to the inner edge of the steel strip on one side, and the second tapered roll is , the diameter of the steel strip on one side gradually increases from the outer edge to the inner edge, and the tension balance roll balances the tension between the two divided steel strips. It is characterized by having a lifting mechanism for controlling balance.

Next, the present invention will be explained with reference to the drawings. 1 to 4 are diagrams showing one embodiment of the present invention. FIG. 1 is a plan view showing the slitting device of the present invention, FIG.
is a side view. The steel strip separating device 12 provided downstream of the slitter 3 includes a first tapered roll 13, a second tapered roll 14, a first deflector roll 18,
It is composed of a third deflector roll 15, a second deflector roll 16, and a tension balance roll 17.

The first tapered roll 13 extends from the outer edge of the steel strip 11b to the inner edge, that is, the sheared part, so as to contact the lower surface of one of the two divided steel strips 11b. is placed towards. The first tapered roll 13 is a steel strip 11b.
It is formed so that its diameter gradually decreases from the outer edge to the inner edge. 1st taper roll 1
A second tapered roll 14 downstream of the steel strip 1
1b in contact with the top surface of steel strip 11b.
are arranged from the outer edge to the inner edge. The second tapered roll 14 then passes through the steel strip 11.
b is formed so that its diameter gradually increases from the outer edge to the inner edge. A third deflector roll 15 downstream of the second tapered roll 14 is placed in contact with the upper surface of the steel strip 11b.

The first deflector roll 18 is arranged in series with the first tapered roll 13 so as to be in contact with the lower surface of the other divided steel strip 11a. A tension balance roll 17 downstream of the first deflector roll 18 is placed in contact with the upper surface of the steel strip 11a. Furthermore, tension balance roll 1
Reference numeral 7 has an elevating mechanism and can be moved up and down in the direction (a) shown in FIG. A second deflector roll 16 downstream of the third deflector roll 15 and the tension balance roll 17 is arranged in contact with the lower surface of the steel strips 11a and 11b.

Coil unwinding device 8 located on the entry side
The unwound steel strip 10 is then sent by a breaker roll 2 to a slitter 3 where it is continuously divided in the length direction. The divided steel strip 11a is wound around a first deflector roll 18 and a tension balance roll 17, while the steel strip 11b is wound around a first tapered roll 13, a second tapered roll 14, and a third tapered roll with different gradient directions. wrapped around deflector roll 15 and steel strips 11a and 11b
are at the same pass line level at the second deflector roll 16.

At this time, on the exit side of the steel strip separating device 12, an appropriate slit interval Δ is generated between the ends of the steel strips 11a and 11b to avoid interference in the width direction of the strips. After that, the steel strip 11a
, 11b are wound up as coils 7a, 7b by a winding device 9 via pinch rolls 5a, 5b. Further, the tension of the divided steel strips 11a and 11b is detected by load meters (not shown) set in the bearing boxes of the third deflector roll 15 and the tension balance roll 17, respectively, and the difference in tension is detected by the tension balance roll 17. This can be resolved by raising and lowering it.

[0015]

[Operation] In order to create a slit interval between the steel strips divided by the slits, it is necessary to change the traveling direction of each steel strip divided by the slits. In the steel strip separating device according to the slitting device of the present invention, this object is achieved by a combination of tapered rolls arranged successively in the steel strip advancing direction.

FIGS. 3 and 4 are diagrams for explaining the action related to steel strip separation. FIG. 3 is a plan view of the first tapered roll and the second tapered roll, and FIG. 4 is a side view. In the figure, the slit interval Δ is expressed by the following formula. Δ=Ltan β=Ltan (a・θ) where, L: Length of the plate between contact points A and B between the steel strip and the first tapered roller 13 and the second tapered roll 14, respectively θ: Inclination angle a of the tapered roll : Correction factor β: Angle at which the steel strip changed course.

Furthermore, the difference in tension occurring between the divided steel strips is determined by the difference in tension between the load cells set in the bearing boxes of the third deflector roll 15 and the tension balance roll 17, as shown in FIGS. 1 and 2. This can be solved by raising and lowering the tension balance roll 17 so that the tension becomes 0. The reason for arranging the tension balance roll here is to maintain appropriate surface pressure between the steel strip and the tapered roll that changes the traveling direction of the steel strip, and to enable operations that prioritize preventing meandering. .

[0018]

As explained above, according to the present invention, in continuous slitting while applying tension to the steel strip, appropriate slit intervals are given to the steel strip divided by the slitter, so that the divided steel It is possible to prevent interference and overlap between the strip ends, and in addition, the tension balance roll built into the steel strip separation device can eliminate the tension difference between each divided steel strip, which is caused by the tension difference. This provides an industrially useful effect of preventing the meandering of the steel strip and the phenomenon that the wound coil becomes bamboo-like.

[Brief explanation of the drawing]

[Fig. 1] A plan view showing a slitting device of the present invention.

[Figure 2]
A side view showing the slitting device of this invention

FIG. 3 is a plan view of a first tapered roll and a second tapered roll for explaining the action related to steel strip separation.

FIG. 4 is a side view of a first tapered roll and a second tapered roll for explaining the action related to steel strip separation.

[Fig. 5] A plan view showing an example of a conventional slitting device.

[Figure 6
] Side view showing an example of a conventional slitting device

[Explanation of symbols]

1 Inlet coil 2, 2a, 2b Breaker roll 3 Slitter 4 Separator 5, 5a, 5b Pinch roll 6 Separator 7, 7a, 7b Output coil 8 Unwinding device 9 Winding device 10 Steel strip before splitting 11, 11a, 11b Steel strip 1 after division
2 Steel strip separation device 13 First tapered roll 14 Second tapered roll 15 Third deflector roll 16 Second deflector roll 17 Tension balance roll 18 First deflector roll

Claims (1)

[Claims] 1. A slitter for continuously shearing a steel strip moving from an upstream side to a downstream side to divide the steel strip into two strips in the length direction; A slitting device comprising a steel strip separating device for creating a predetermined slit interval between strips, the steel strip separating device being in contact with one surface of one side of the divided steel strip downstream of the slitter. a first tapered roll extending from an outer edge to an inner edge of the steel strip on one side, and downstream of the first tapered roll, the other surface of the steel strip on one side; a second tapered roll extending from the outer edge to the inner edge of the steel strip on one side, and downstream of the slitter, one of the split steel strips on the other side; a first deflector roll disposed in contact with the surface of the first deflector roll; a tension balance roll disposed downstream of the first deflector roll in contact with the other surface of the other steel strip; 2 tapered rolls and a second deflector roll disposed downstream of the tension balance roll so as to be in contact with one surface of the divided steel strip on both sides, and the first tapered roll The second tapered roll is formed so that its diameter gradually decreases from the outer edge to the inner edge of the steel strip on one side, and the second tapered roll extends from the outer edge to the inner edge of the steel strip on one side. A slitting device characterized in that the tension balance roll is formed such that its diameter gradually increases toward the end of the steel strip, and the tension balance roll is equipped with a lifting mechanism for controlling the balance of tension between both divided steel strips. .