JPH0360911A - Method and device for slitting metal plate - Google Patents

Abstract

PURPOSE:To properly wind without using a separator immediately before a winding reel, by making the distance from the center of a tension adding device of a slitter downstream to the winding device center, the width of a slit metal plate, the relation of a winding tension and tension under constant conditions. CONSTITUTION:A device is composed of a payoff reel 1, slitter 2, separator 3, tension adding device 4, deflector roll 5, winding reel 6 and free loop belts 7a, 7b. In the case of a metal sheet S slitted by a slitter 2 being wound by a winding reel 6, the slitting sheet S can be wound without any irregular shape under the conditions of 1.0<=T<=3.0, L>=10{(-1.2W+1)WT}V<2>, provided the distance from the center of the tension adding device 4 up to the winding reel 6 center be taken as LM, the width of the slitting sheet S as Wm and a winding tension as Tkg/mm<2>.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a slitting method suitable for metal plates, particularly electrical steel sheets, and an apparatus suitable for carrying out the method.

[Conventional technology]

After cold rolling and annealing, the electrical steel sheet is slit into several strips in a slitting equipment and manufactured into products. Figure 3 shows conventionally used slitting equipment, where (8) is a payoff reel, (9) is a slitter, (10a) and (10b) are free loop bands, (lla) and (Llb) are separators, ( 1
2) is a tensioning device, (13) is a deflector roll, (
14) is a take-up reel, and the steel plate (SO) slit by the slitter (9) passes through a free loop (LOA) and a separator (LLA), and then is transferred to the take-up reel (14) by a tension applying device (12). Tension is applied between them, and after passing through a separator (1 lb) just before the take-up reel, it is taken up on the take-up reel (14).

Generally, in lines where the diameter of the handling coil is small, a separator (LLB) is often not installed just before the take-up reel, but in recent years, the outer diameter of the handling coil has been increased due to customer requests and for reasons such as improving work efficiency. Conventionally, in order to properly wind up such a large diameter coil without causing irregularities, a separator just before the take-up reel has been essential.

[Problem to be solved by the invention]

However, there is a problem that the separator just before the take-up reel damages the edges of the slits, and since the edges of the slit plates are used as they are for EI Cocoa, scratches on the edges of the slit plates reduce the product value, and sometimes the edges of the slit plates are used as is. There are times when you can't do it.

In view of these conventional problems, it is an object of the present invention to provide a method capable of appropriately winding up a slit plate without using a separator immediately before the winding reel, and a device suitable for carrying out the method. .

[Means and Examples for Solving the Problems] Therefore, in the method of the present invention, when a metal plate is slit by a slitter and then wound onto a first winding device, a tension applying device is provided at the downstream side of the slitter in the line direction. The distance from to the center of the winding device is L (m), the width of the slit plate is W (m),
A feature of the present invention is that the slit metal plate is wound on a winding device so that the following conditions are satisfied when the winding tension is T (kg/am'').

1.0≦T≦3.0 L≧10 −1.2W + 1) W , a tension applying device, and a deflector roll in this order, and is characterized in that the distance L (+i) between the center of the tension applying device and the center of the take-up reel satisfies the following formula.

L≧10 −, W+IWT However, @ (m) T: Winding tension (
kg/mm'') The present invention will be explained in detail below.

Figure 1 shows the device of the present invention and its usage situation, where (1) is a payoff reel, (2) is a slitter, and (3) is a payoff reel.
is a separator, (4) is a tension applying device, (5) is a deflector roll, (6) is a take-up reel, (7a) (7b)
is the free loop band.

In the method of the present invention, when winding up the metal plate (S) (slit plate) slit by the slitter (2) with the take-up reel (6), the take-up reel (
6) Distance to the center is L (+s), slit plate (S)
The width is W (s), and the winding tension is T (kg/n++a2
).

1.0≦T≦3.0 ... (1) L≧1
0-0...The slit plate (S) is wound under conditions that satisfy (2).

Here, T≦1. In Q, even if the slit plate could be wound onto a take-up reel, the coil would collapse when taken out from the reel, making it impossible to commercialize it. Further, when T>3.0, there are problems in that the quality characteristics of the low-drop material deteriorate, and in the case of electromagnetic steel sheets, the magnetic characteristics deteriorate due to the introduction of strain, and reel marks also occur. FIG. 2 shows the distance between the tension applying device and the take-up reel, which can appropriately wind up the slit plate without using a separator just before the take-up reel, regarding the above equation (2).
The range of the slit plate @W is shown in relation to the winding tension T. The distance that can be wound is proportional to the winding tension T and the slit plate width W, and the relationship in equation (2) above is be guided.

In the range of L<10v'(1-1, 2W+1)WT, the slit plate (S) cannot be appropriately wound without causing irregularities.

Next, the apparatus of the present invention shown in FIG. 1 will be explained.

The device of the present invention does not provide a separator immediately before the take-up reel, and the ff [
L is configured to satisfy the above-mentioned conditions. Also,
The tension applying device (4) may be configured to be position adjustable in the line direction. In addition, along with this, a deflector roll (5
) may also be movable in the line direction.

Further, as the tension applying device (4), in addition to the pad type shown in the figure, any type such as a belt pridle type, a tension roll type, etc. can be used.

〔Effect of the invention〕

According to the present invention described above, the slit plate can be properly wound onto the take-up reel without using a separator immediately before the take-up reel, and even in the case of a large diameter coil, the slit plate can be wound without edge damage caused by the separator. Obtainable.

[Brief explanation of drawings]

FIG. 3 is an explanatory diagram showing the apparatus of the present invention and its usage situation. Figure 2 shows the distance between the tension applying device and the take-up reel and the range of the slit plate @W in relation to the take-up tension T, which allows the slit plate to be appropriately wound up without using a separator just before the take-up reel. This is what is shown. FIG. 3 is an explanatory diagram showing a conventional slitting facility. In the figure, (2) is a slitter, (3) is a separator,
(4) is a tensioning device, (5) is a deflector roll, (
6) is a take-up reel, and (7b) is a free loop band. Figure 1 Figure 2 Pick-up 1. width (Vamps)

Claims (2)

[Claims] (1) After slitting a metal plate with a slitter, when winding it up on a winding device, the distance from the center of the tensioning device installed downstream of the slitter to the center of the winding device in the line direction is L (m), and the slit metal A metal plate characterized in that a slit metal plate is wound on a winding device so that the following conditions are satisfied, where the width of the plate is W (m) and the winding tension is T (kg/mm^2). slit method. 1.0≦T≦3.0 L≧10√{(-1.2W+1)WT} (2) From the upstream side of the line, the slitter, free loop band,
A slitting device for metal plates, which includes a separator, a tension applying device, and a deflector roll in this order, and is configured such that a distance L (m) between the center of the tension applying device and the center of a take-up reel satisfies the following formula. L≧10√{(-1.2W+1)WT} However, W: Width of slit metal plate (m) T: Winding tension (kg/mm^2)