JPH06104242B2 - Rolling equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rolling apparatus capable of correcting plate warpage that occurs in a rolled material due to rolling differential speed rolling.

[Prior Art] By applying a high tension to the rolled material on the outlet side of the rolling mill, the rolling reduction can be increased, and as a result, the rolling load is reduced, and slippage can be prevented because the advanced rate shifts to the inlet side. The advantages are that the shape is stable and narrowing can be prevented. Therefore, conventionally, as shown in FIG. 3, a tandem mill is provided with a tension bridle roll b between a final stand a and a tension reel c, or, as shown in FIG. 4, a final stand a and a tension reel c. There is a pinch roll d disposed between and.

On the other hand, when the dull weight is applied on the rolling mill, the work is performed on the final stand of the tandem mill.

However, in the device shown in FIG. 3 among the above-mentioned devices, (i) the tension is not greatly applied because the tension is applied by the winding friction (the friction coefficient is limited).

(Ii) The plate that is going to increase the motor power and apply the high tension tends to meander.

(Iii) When trying to apply high tension, the number of bridle rolls increases and the equipment cost increases.

There was a problem such as.

Further, the apparatus shown in FIG. 4 has a problem that the pressing force and the tension addition due to the friction friction are limited (the pinch force is limited and high tension cannot be applied).

Furthermore, if the dull weight is applied to any stand in the tandem mill, the coefficient of friction increases at that stand, and
There is a problem that only a rolling reduction of about 7% can be obtained.

Therefore, in order to solve the above problems, the final stand a of the tandem mill as shown in FIG.
It has been considered that a device e capable of winding different speed rolling is disposed between the tension reel c and the tension reel c.
By doing so, high tension can be applied to the exit side of the final stand a due to the winding belt effect and the pinch force, so that the reduction rate of the final stand a can be increased, and the roll of the device e can be changed to a dull roll. Since the rolling material s can be provided with an elongation rate of about 1 to 3% by performing differential speed rolling using
There is an advantage that it is not necessary to make a dent in the tandem mill, high pressure can be performed in the tandem mill, and the plate shape can be kept excellent at an elongation rate of 1 to 3%.

[Problems to be Solved by the Invention] However, when winding different speed rolling is performed as shown in FIG.
Under tension, the rolled material s has a warp f on the high-speed roll e'side as shown in the figure, and also a warp g in the direction in which the pass line is inclined.

In view of the above situation, the present invention has an object to prevent the rolled material from warping even when the rolled material is subjected to rolling under high tension.

[Means for Solving the Problems] The present invention provides a rolling differential speed rolling mill, which is a rolling roll subjected to a dull process, on the exit side of the rolling mill, and the rolling material is rolled by the rolling differential speed rolling mill. At the rolling position where tension can be applied and dullness can be added, the rolling rolls of the winding differential speed rolling mill are high-speed side rolls and low-speed side rolls from the inlet side to the outlet side in the traveling direction of the rolled material. A device for forming the pressing roll and moving the pressing roll in a direction parallel to the traveling direction of the rolled material is provided.

[Operation] Therefore, in the present invention, the pressing roll is moved in a direction parallel to the traveling direction of the rolled material so as to cancel the plate warp.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which 1 is a tandem mill,
Reference numeral 2 is a deflector roll, 3 is a rolling differential speed rolling mill, and the rolling differential speed rolling mill 3 is composed of a low speed side roll 3a, a high speed side roll 3b, and a pressing roll 3c. Rolls 3a, 3b,
3c is dulled so that the press roll 3c can be offset in a direction parallel to the traveling direction of the rolled material s.

In such a rolling apparatus, the rolled material s is rolled by a tandem mill at 1 and then wound around the low speed side roll 3a and the high speed side roll 3b of the different winding speed rolling machine 3 which is rolled to perform the different speed rolling, and the high speed side. The roll 3b and the presser roll 3c carry out a slight pressure reduction and send it to the downstream side. During rolling, the peripheral speeds of the high-speed roll 3b and the press roll 3c are constant. Further, the rolled material s is dulled between the low speed side roll 3a and the high speed side roll 3b and between the high speed side roll 3b and the pressing roll 3c.

Thus, by such rolling, the high speed side roll 3b and the press roll
When the rolled material s coming out from between 3c and 3c has a convex warp, the pressing roll 3c is offset to the upstream side of the traveling direction of the rolled material s as shown by the two-dot chain in FIG. Therefore, as a result of a downward convex warp occurring in the rolled material s on the downstream side of the roll gap between the high-speed side roll 3b and the presser roll 3c, the downward convex warp and the upward convex warp cancel each other out and become flat. A plate of various shapes can be obtained.

Rolled material s coming out between the high-speed roll 3b and the presser roll 3c
If a downward warp occurs on the
Offset from the position shown by the solid line to the downstream side of the traveling direction of the rolled material s. As a result, an upward convex warp is generated in the rolled material s, and the upward convex warp and the downward convex warp cancel each other out, so that a flat plate can be obtained.

FIG. 2 shows another embodiment of the present invention which is different from the above embodiment in that the low speed side roll 3a is arranged above the high speed side roll 3b and the pressing roll 3c is arranged below the high speed side roll 3b. is there.
Even with such a configuration, the pressing roll 3c is appropriately offset in a direction parallel to the traveling direction of the rolled material s to obtain the rolled material s.
It is possible to cancel the plate warpage that has occurred in the above and obtain a plate having a flat shape.

In the examples of the present invention, no particular reference is made to the rolls used in the winding different speed rolling mill, but it is also possible to use those having the same diameter or those having different diameters. It goes without saying that various changes can be made without departing from the scope of the invention.

[Effects of the Invention] According to the rolling device of the present invention, it is possible to obtain an excellent effect that it is possible to prevent the occurrence of plate warpage in the rolled material.

[Brief description of drawings]

FIG. 1 is an explanatory view of one embodiment of the present invention, FIG. 2 is an explanatory view of another embodiment of the present invention, FIG. 3 is an explanatory view of an example of the conventional art, and FIG. 4 is another example of the conventional art. Explanatory drawing, FIG. 5 is FIG. 3 and FIG.
It is explanatory drawing of the example which solved the defect of the conventional thing of the figure. In the figure, 1 is a tandem mill, and 3 is a winding different speed rolling mill.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroyuki Shiozaki, No. 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi, Kawashima Harima Heavy Industries, Ltd. Yokohama No. 2 factory 1043-2 (72) Inventor Shuichi Iwafuji 5-7-1 Iseoka, Fukuyama City, Hiroshima D-441 (72) Inventor Tomoya Izushi 6-4 Iseoka, Fukuyama City, Hiroshima (56) References Japanese Patent Laid-Open No. 56- 151111 (JP, A)

Claims (1)

[Claims] 1. A rolling differential speed rolling machine, in which a predetermined rolling roll is dull processed, is arranged on the exit side of the rolling mill, and tension and dullness are applied to a rolled material by the winding differential speed rolling machine. In the rolling device so that it can be attached, the rolling roll of the winding different speed rolling mill is formed by the high-speed side roll, the low-speed side roll, and the press roll from the entrance side to the exit side with respect to the traveling direction of the rolled material, In addition, the rolling apparatus is provided with a device for moving the pressing roll in a direction parallel to the traveling direction of the rolled material.