JPH0616881B2 - Slab forming equipment row - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a slab forming apparatus row.

[Prior Art] In recent years, compared to roll width rolling, a large amount of width reduction can be obtained at one time, the internal porosity of a slab or the like has a large pressure-bonding effect, and a dog bone does not occur, so downstream rolling is performed. Various researches have been conducted on the width reduction of a hot material by a width reduction press because it has excellent effects such as less fish tail formation during molding.

[Problems to be Solved by the Invention] However, a slab forming line capable of forming a slab efficiently and with high quality while maximizing the effect of press width reduction has not yet been realized. At present, it is impossible to make full use of the features of press molding.

The present invention has been made paying attention to such points, and an object thereof is to make it possible to efficiently form a slab with compact equipment while making the most of the excellent features of the width reduction press.

[Means for Solving Problems] The present invention is intended to solve the above technical problems,
A common descaling device is provided between the heating furnaces arranged in parallel, and a width press device is provided on the downstream side of the slab so as to perform the width reduction from one end of the slab and perform the width reduction from the other end on the way. An edger roll adapted to perform light width reduction of the slab is provided on the downstream side of the pressing device, and a horizontal rolling mill is provided on the downstream side of the edger roll, and the descaling device, width pressing device, edger roll, and horizontal The present invention relates to a slab forming device row in which a slab transfer line is configured so that the slab can be transferred in each direction of the rolling mill in the direction opposite to the line advancing direction.

[Operation] Therefore, in the present invention, after the oxide scale and the like are removed by the common descaling device provided between the heating furnaces arranged in parallel, the width reduction of the slab is performed from one end of the slab by the width press device. , The fish tail of the slab is reduced by performing from the other end in the middle, and then the slab end face shape is leveled by the width reduction of the press by the light reduction of the edger roll, and then horizontally rolled by the horizontal rolling mill. As a result, efficient and high-quality slab molding can be performed with compact equipment.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the present invention, in which heating furnaces are arranged in parallel.
A shared descaling device 3 is provided on the front surface between 1 and 2, and on the downstream side of the descaling device 3, a width press device 4, an edger roll 5, and a horizontal rolling mill 6 are sequentially installed, The slab transfer line is configured so that the slab 7 can be transferred in the direction opposite to the line advancing direction at each position of the descaling device 3, the width pressing device 4, the edger roll 5, and the horizontal rolling mill 6.

Here, the slab 7 from the heating furnace 2 located on the downstream side of the descaling device 3 is once moved by the slab transfer line in a direction opposite to the line advancing direction (direction from right to left in FIG. 1). By the descaling device 3
Is supposed to be passed through.

The slab 7 heated by the heating furnaces 1 and 2 is first subjected to a press width reduction by a width pressing device 4 after the oxide scale and the like are removed by a desquerig device 3.

At this time, the press width reduction of the slab 7 is performed as shown in FIG. 2 (A) from the rear end 7a side in the line advancing direction toward the front end 7b (in the direction opposite to the line advancing direction) to a required position. After being performed, the mold of the width press device 4 as shown in FIG. 2 (B)
8 is replaced, and this time, the slab 7 is subjected to press width rolling in the line advancing direction from the front end 7b side.

Generally, when the slab is subjected to a press width reduction from the front end to the rear end at a stretch, a large fishtail b is formed at the rear end of the slab a as shown in FIG. 3, and when rolling with this slab horizontal rolling mill, Furthermore, the fish tail becomes longer, resulting in a decrease in product yield.

On the other hand, as described above, when the slab 7 is subjected to the press width reduction from both end sides, the slab 7 having a rectangular shape as shown in FIG. 2 (B) can be obtained. The mold 8 can be exchanged by changing the direction of the mold or by replacing it with another mold, and further by having a vertically symmetrical mold shape and moving it up and down. You may use what was switched.

The width reduction by the width press device 4 causes slight unevenness on the pressure lower surface, so that the width end face is smoothed by lightly reducing the width by the edger roll 5, and then the horizontal rolling machine 6 reverses. Roll to form a slab of the required thickness.

Therefore, according to the above embodiment, the slab forming operation can be efficiently performed while maximizing the excellent effect of the width pressing device 4 with the minimum device arrangement.

It should be noted that the present invention is not limited to the above embodiments, and various changes can be made without departing from the scope of the present invention.

[Advantages of the Invention] As described above, according to the slab forming apparatus row of the present invention,
Various excellent effects as described below can be obtained.

(I) A descaling device is disposed between juxtaposed heating furnaces, and for a slab from the heating furnace located on the downstream side of the descaling device, the slab is moved in the direction opposite to the line advancing direction. Therefore, the oxide scale is removed by passing through the descaling device, so that the descaling device can be shared by the slabs from each heating furnace, and the line length can be increased even if the descaling device is provided. The equipment can be kept compact and the equipment cost can be kept low.

(II) The width reduction of the slab is performed from one end of the slab by the width press device, and the fish tail of the slab is reduced by performing it from the other end in the middle, and then the slab width end is shaped by the light reduction by the edger roll. Since it is rolled and formed by a horizontal rolling machine afterwards, it is possible to efficiently form a high quality slab with a small fish tail in a compact facility while taking advantage of the excellent feature of press width reduction.

[Brief description of drawings]

FIG. 1 is an overall explanatory view showing an embodiment of the present invention, FIG.
(A) and (B) are explanatory views of a pressing method using a width pressing device, the third
The figure is an explanatory view of the slab when the press width is reduced in only one direction. 1, 2 is a heating furnace, 3 is a descaling device, 4 is a width press device, 5 is an edger roll, 6 is a horizontal rolling mill, 7 is a slab, and 8 is a die.

Claims (1)

[Claims] 1. A width depressing device provided with a shared descaling device between juxtaposed heating furnaces, and downstream of the descaling device is adapted to perform width reduction from one end of the slab and perform width reduction from the other end midway. An edger roll is provided on the downstream side of the width pressing device so as to perform a light width reduction of the slab, and a horizontal rolling mill is provided on the downstream side of the edger roll. A slab forming device line comprising a slab transfer line configured to transfer a slab in the direction opposite to the line advancing direction at each position of an edger roll and a horizontal rolling mill.