JPS6156706A - Rolling-mill equipment - Google Patents

Abstract

PURPOSE:To straighten the chamber of a sheet by arranging a wrapping different-speeds rolling mill at the outlet side of a rolling mill and installing at least a pair of grouped rolls consisting of offset upper and lower rolls. CONSTITUTION:A different-speeds rolling mill 2 equipped with a low-speed rolling roll 2a and a high-speed rolling roll 2b, is arranged at the outlet side of a rolling mill 1. A roll device 3, consisting of rolls offset vertically with respect to a rolled stock (s), is installed to provide a slight rolling reduction or a pinch load to its rolls. The camber of rolled stock (s), produced by the different- speeds rolling of mill 2, is straightened because a slight rolling reduction or a pinch load is provided to the rolled stock (s) by the offset rolls of device 3. In this way, the camber of a rolled stock (s) is corrected, and its shape is well formed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rolling device in which winding is capable of correcting sheet warping caused in a rolled material by a different speed rolling mill. .

[Prior art] By applying high tension to the rolled material at the rolling +i exit side, 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. It has advantages such as stable shape and prevention of narrowing. 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.

On the other hand, when dulling is performed by rolling, the work is performed on the R end stand of a tandem mill.

However, in the device shown in FIG. 3 among the above-mentioned devices, (i) the winding is caused by tension due to friction (q addition), so the tension is not very large (there is a limit to the coefficient of friction);

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

Qi) 'Q Applying tension and applying tension will increase the number of priddle rolls and increase equipment costs.

There were other problems.

In addition, the device shown in FIG. 4 has a problem in that there is a limit to the application of tension due to pressing force and friction (there is a limit to pinch force, and high tension cannot be applied).

Furthermore, when dulling is carried out on one of the stands in a tandem mill, there is a problem in that the coefficient of friction becomes large on that stand, and a reduction rate of only about 5 to 7% can be achieved.

Therefore, in order to solve each of the above-mentioned problems, as shown in FIG. An LC device is being considered.

In this way, high tension can be applied to the exit side of the final stand a by the belt effect and pinch force, and therefore the rolling reduction of the final stand a can be increased, and the roll of the device e can be By performing speed-up rolling using dull rolls, an elongation rate of about 1 to 3% can be given to the rolled material S, so it is possible to increase the dullness with the loading Qe, and it is necessary to install a tandem mill feeder opening. It is possible to perform under high pressure with a tandem mill, and the offshore ratio is 1.
There are advantages such as the ability to maintain a good plate shape at ~3%.

[Problem that Fujimei is trying to solve 1 However, as shown in Fig. 5, when winding is done by Tatsumi-speed rolling,
When the rolled material S is under tension, a warp [ as shown in the figure ] occurs on the high speed roll O' 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 1] In the present invention, a winding speed-up rolling device and a roll device for correcting sheet warpage are sequentially disposed on the exit side of a rolling mill.

[Function] Accordingly, in the present invention, when a plate warp occurs in the rolled material due to winding speed rolling, the plate warp is corrected by the roll device.

[Embodiment 1] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 shows an embodiment of the present invention, in which 1 is a conventional rolling mill;
2 is a different speed rolling machine equipped with low-speed rolling rolls 2a and high-speed rolling rolls 2b; 3 is a rolling mill with rolls arranged above and below the rolled material S, and the rolls can be offset to apply a light reduction or pinch load. It is a roll device.

After the rolled material S is rolled in the rolling mill 1, it is wound around the rolling rolls 2a and 2b, which are driven at a predetermined different speed ratio, at a predetermined angle. On the other hand, the rolled material S may be warped in the direction of wrapping around the high-speed rolling roll 2b due to increasing speed rolling. The warpage of the plate is corrected by applying a light reduction or pinch load while the plate is in a flat state.

FIG. 2 shows another embodiment of the present invention, in which reference numeral 5 denotes a leveler having the same functions as the roll device 4 described above. In this case, the warp of the plate caused by the winding speed rolling is corrected by the leveler 5.

In the figure, the same reference numerals as those shown in FIG. 1 indicate the same parts.

Note that the present invention is not limited to the above-mentioned embodiments,
Of course, the scale rod may be modified without departing from the gist of the present invention.

[Effects of the Invention] According to the rolling apparatus of the present invention, it is possible to correct warping of the sheet when it occurs in rolling +2, and it is possible to achieve various excellent effects such as making the shape of the rolled material T-shaped.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of one embodiment of rolling g1ζ1 of the present invention, and FIG. 2 is an explanatory diagram of another embodiment of the rolling apparatus of the present invention M! Fig. 3 is an explanatory diagram of an example of the conventional one, Fig. 4 is an explanatory diagram of another example of the conventional one, and Fig. 5 clarifies the drawbacks of the ones shown in Figs. 3 and 4. FIG. In the figure, 1 is the rolling mill, 2 is the speed rolling, 3 is the roll neck, and 4 is the rolling machine.
is a deflector roll, and 5 is a leveler. Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd. Figure 1, Building 2

Claims (1)

[Claims] 1) At least one pair or more of roll groups in which the rolls located above and below the rolled material are offset, respectively, on the exit side of a rolling line in which a winding and different speed rolling machine is arranged on the exit side of the required rolling mill. A rolling device characterized in that it is configured to correct sheet warpage by arranging the sheets.