JPS61189802A - Method and device for rolling - Google Patents

Abstract

PURPOSE:To prevent the generation of a sheet camber, and to obtain a flat rolling stock, by offsetting the 3rd roll, numbered from the inlet side, parallelly to the advancing direction of a rolling stock, in a wrapping different-speeds rolling. CONSTITUTION:A wrapping different-speeds rolling mill 3 having dulled rolls is arranged at the outlet side of rolling mills. The mill 3 is constituted of a low-speed roll 3a, a high-speed roll 3b and a press roll 3c. When an upward- projected camber is produced in a rolling stock S delivered from between the rolls 3b, 3c, the roll 3c is offset to the upstream side of the advancing direction of stock S. Then a downward-projected camber is produced at the downstream side of a roll gap between the rolls 3b, 3c, to cancel the upward-projected camber, and a flat sheet stock is obtained. Further, when a downward-projected camber is produced in the stock S delivered from between the rolls 3b, 3c, the roll 3c is offset to the downstream side of the advancing direction of stock S.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rolling apparatus capable of correcting sheet warpage caused in a rolled material by winding true speed rolling.

[Prior art] By applying high tension to the rolled material on the exit side of the rolling mill, the rolling reduction ratio can be increased, and as a result, the rolling load is reduced, and slipping can be prevented because the rolling ratio is shifted to the entry side. , the shape is stable and narrowing can be prevented. For this reason, conventionally, as shown in Fig. 3, a tension pry roll b is disposed between the final stand a of the tandem mill and the tension reel C, or a fourth
As shown in the diagram, the final stand a and tension reel C
There are also those with pinch rolls d arranged between them.

-When dulling is carried out in a rolling mill, the work is done on the last stand of a tandem mill.

However, in the device shown in FIG. 3 among the above-mentioned devices, (i) the tension is applied by the fJ friction, so the tension is not large (there is a limit to the coefficient of friction).

(U) If you try to increase the motor power and apply high tension, the plate will tend to meander.

(g) If you try to apply high tension, the number of priddle rolls will increase, which will increase the equipment cost.

There were other problems.

In addition, in the device shown in FIG. 4, the pressing force and J! There was a problem in that there was a limit to the application of tension by Jm friction (there was a limit to the pinch force, and high tension could not be applied).

Furthermore, if dull weighting is performed on any stand in the tandem mill, the coefficient of friction will increase on that stand, and the
There was a problem that only a rolling reduction of about 7% could be achieved.

Therefore, in order to solve the above-mentioned problems, a device e that can perform winding and different speed rolling is installed between the final stand a and the tension reel C of the tandem mill, as shown in FIG. It is being considered that the In this way, high tension can be applied to the exit side of the final stand a by the winding belt effect and pinch force, and therefore the rolling reduction rate of the final stand a can be increased, and the roll of the device e can be used as a dull roll. By performing true speed rolling using the rolling material S, an elongation rate of about 1 to 3% can be given to the rolled material S, so that it is possible to form dull edges using the device e, and there is no need to apply dull edges using a tandem mill. It has advantages such as being able to perform under high pressure with a tandem mill, and being able to maintain a good plate shape with an elongation rate of 1 to 3%.

[Problems to be solved by the invention] However, when winding and true speed rolling is performed as shown in FIG.
When the rolled material S is under tension, a warp as shown in the figure occurs on the high speed roll e' side, and a warp 9 also occurs in the direction in which the pass line is inclined.

The present invention has been made in view of the above-mentioned circumstances, with the object of preventing sheet warpage from occurring in a rolled material even when rolling is performed by applying a high tension to the rolled material.

[Means for Solving the Problems] The present invention provides a winding, different speed rolling mill in which rolling rolls are rounded on the exit side of the rolling mill, and the rolling material is rolled by the winding, different speed rolling mill. 45 at a rolling position where tension is applied and a dull mark is applied to the rolling mill, and the rolling rolls of the winding and different speed rolling mill are turned from the input side to the output side by a high-speed side roll, a low-speed side roll, and a presser roll. A device is provided for forming and moving the presser roll in a direction parallel to the traveling direction of the rolled material.

[Function] Therefore, in the present invention, the presser roll is moved in a direction parallel to the traveling direction of the rolled material so that the sheet warpage is canceled out.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, and 1 in the figure is a tongue.

Dem mill, 2 is a deflector roll, 3 is a winding different speed rolling mill, and the winding different speed rolling mill 3 is on the low speed side [1-ru 3a
, high-speed side roll 3b, and presser roll 3C.

It is formed from. The rolls 3a, 3b, and 30 are provided with a dull h loe, and the presser roll 3C can be offset in a direction parallel to the traveling direction of the rolled material S.

In such a rolling device, the rolled material S is rolled at 1 in a tandem mill, then wound around a low speed roll 3a and a high speed roll 3b of a winding different speed rolling mill 3, and rolled at true speed. It is lightly pressed down by the roll 3b and the presser roll 3C and sent to the downstream side.

During rolling, the circumferential speeds of the high-speed roll 3b and the presser roll 3C are constant. Further, the rolled material S is placed between the low speed side roll 3a and the high speed side roll 3b, and between the high speed side roll 3b and the presser roll 3C.
A dot is marked between.

If such rolling causes an upward warp in the rolled material S coming out from between the high-speed roll 3b and the presser roll 3C, the presser roll 3C is moved along the two-dot chain line in FIG. As shown in , the rolling material S is offset to the upstream side as it progresses.

Therefore, on the downstream side of the roll gap between the high-speed roll 3C and the presser roll 3C, the rolled material S has a downward convex warp, and the downward convex warp and the above-mentioned upward convex warp cancel each other out, resulting in a flat material. The roots of the shape are obtained.

If a downward convex warpage occurs in the rolled material S coming out from between the high-speed side roll 3b and the presser roll 3C, the presser roll 3C
is offset from the position shown by the solid line in FIG. 1 to the downstream side in the traveling direction of the rolled material S. As a result, the rolled material S has an upwardly convex warp, and the upwardly convex warp and the downwardly convex warp cancel each other out, making it possible to obtain a flat plate.

FIG. 2 shows another embodiment of the present invention, which differs from the previous embodiment in that a low-speed roll 3a is provided above the high-speed roll 3b, and a presser roll 3C is provided below the high-speed roll 3b. be. With such a configuration, by appropriately offsetting the holding roll 3c in a direction parallel to the traveling direction of the rolled material S, it is possible to cancel the warping of the rolled material S and obtain a flat plate.

J3. In the embodiments of the present invention, no particular mention is made of the rolls used in the winding and different speed rolling mill, but rolls of the same diameter or of different diameters can be used, and other points are noted in this book. Of course, various changes may be made without departing from the gist of the invention.

[Effects of the Invention] According to the rolling method and apparatus of the present invention, an excellent effect can be achieved in that sheet warping can be prevented from occurring in the rolled material.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of an embodiment of the pond of the present invention, Fig. 3 is an explanatory diagram of a conventional example, and Fig. 4 is an explanatory diagram of another conventional example. Explanatory diagram, Figure 5 is the same as Figures 3 and 4.
FIG. 2 is an explanatory diagram of an example in which the drawbacks of the conventional one shown in FIG. In the figure, 1 is a tandem mill, and 3 is a winding and different speed rolling mill. Patent application: Ishikawajima-Harima Heavy Industries Co., Ltd. Patent application: Nippon Steel Tube Co., Ltd. e Co., Ltd., applicant's representative, Figure 1 @ Figure 2

Claims (1)

[Claims] 1) A winding different speed rolling mill in which predetermined rolling rolls are subjected to dull processing is arranged on the exit side of the rolling mill, and tension is applied to the rolled material by the winding different speed rolling mill. In the rolling method, the third roll from the input side of the rolling rolls of the winding and different speed rolling mill is offset in a direction parallel to the rolling direction of the rolled material, thereby forming a plate of the rolled material. A rolling method characterized by correcting warpage. 2) On the exit side of the rolling mill, a different speed winding mill in which predetermined rolling rolls are rounded is arranged, and the different speed winding mill is capable of applying tension and rounding the rolled material. In the rolling apparatus, the rolling rolls of the winding and different speed rolling machine are formed from the input side to the output side by a high speed side roll, a low speed side roll, and a presser roll, and the presser roll is used to control the progress of the rolled material. A rolling device characterized in that it is provided with a device for moving in a direction parallel to the rolling direction.