JPS6211921B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling method capable of enlarging or reducing the width of a material to be rolled when rolling a plate material, and a rolling mill therefor.

In plate products made of steel, light metals, and other plastic materials, there are many types of plate widths required for the product plates. Normally, these products are manufactured by rolling, but the widths of the rolled materials tend to be concentrated in order to avoid complication in the manufacturing process. Particularly in the field of steel, continuous casting has the great advantage of consolidating the slab width, and many width adjustment rolling methods have been developed. Methods for widening the board width include the camel rolling method (Japanese Patent Publication No. 15961/1986) and the corrugated rolling method (Japanese Patent Publication No. 15961/1986).
50-1463) etc. are known. Further, as methods for narrowing the width of the plate, there are known methods such as width reduction rolling using vertical rolls (Japanese Patent Publication No. 47-36619), slit rolling method (Japanese Patent Publication No. 42732-1987), and the like. However, all of these methods can only either widen or narrow the width, and the range in which the width of the material can be aggregated is narrow, and it is difficult to finely adjust the width of the finished product.

The present invention relates to a rolling method and a rolling mill capable of widening and narrowing the width, and the gist thereof is as follows.

(1) A plurality of rolling rolls are arranged with their axes parallel or substantially parallel to the surface of the rolled plate material in the width direction of the rolled plate material, and the angle between the rolling rolls and the rolling direction is adjusted. A width adjustment rolling method characterized by adjusting the width of the plate after rolling.

(2) A plurality of rolling rolls are arranged with their axes parallel or substantially parallel to the surface of the rolled plate material in the width direction of the rolled plate material, and the angles formed by the rolling rolls with the rolling direction are varied. A width adjusting rolling mill comprising a means.

The present invention will be explained in detail below based on the drawings.

FIG. 1 shows an embodiment of the present invention.
The rolling rolls are arranged on the left and right sides of the pass line, and the central axis of each roll can be tilted by an angle α. Because of the inclination angle α, the width of the material 1 increases as it receives the driving force F in the direction of increasing the width.

In FIG. 1, reference numerals 1 and 2 are inclined rolling rolls, and in this embodiment, they are arranged in a horizontal plane so that the angle α between them and the rolling direction (pass line) 3 can be changed.

When changing the angle α, the inclined rolling rolls 1 and 2 are displaced in the arrow X or Y direction. Set the axes of inclined rolling rolls 1 and 2 to X or Y.
The direction is changed by displacing a roll chock (not shown) provided outside the side edge of the rolled material in the direction of arrow X or Y using, for example, a fluid pressure cylinder.

4 is a rolled material before width adjustment rolling, and 5 is a rolled material after width adjustment rolling.

FIG. 2 shows an example of the relationship between the inclination angle α and the width ratio (B ₁ /B ₀ ).

Note that B ₀ is the width of the material, and B ₁ is the width of the finished product. Also, α assumes that the direction of the figure is positive.

As is clear from the figure, the width ratio increases as α increases, and decreases as α decreases. Also, there is a critical angle α ^* with a width ratio of 1.0.
Furthermore, we have confirmed that the above phenomenon is common and there are no exceptions.

Therefore, it is easy to see that rolling at the above-mentioned critical angle α ^* results in a wider width, and rolling at less than the above critical angle results in a narrower width.

The above is the basic concept of the present invention, and sufficient effects can be obtained even if the present invention is implemented as is.Next, two embodiments for implementing the present invention more effectively will be described. These embodiments are illustrated in FIGS. 3 and 4.

In FIG. 3, reference numerals 1 and 2 indicate inclined rolling rolls, which are inclined with respect to a line perpendicular to the rolling direction 3 at a positive inclination angle α in a horizontal plane to constitute a second stand.

This embodiment is an embodiment in which the width of the rolled plate material is expanded, and the first stand 6 and the third stand 7
consists of a pair of rolls whose axis is perpendicular to the rolling direction in a horizontal plane. 4 is the material before rolling,
5 is the material after rolling.

FIG. 4 shows an embodiment in which the width of the rolled plate material is reduced. In FIG. 4, reference numerals 11 and 12 indicate inclined rolling rolls, which are inclined with respect to a line perpendicular to the rolling direction 3 at a negative inclination angle α in a horizontal plane, and constitute a second stand.

14 indicates the material before rolling, and 15 indicates the material after rolling (rolled product). 16 is the first stand, 1
A third stand 7 is composed of a pair of rolling rolls having an axis perpendicular to the rolling direction in a horizontal plane.

FIG. 3 shows an example of widening by three-stand rolling, and the rolling mill shown in FIG. 1 is used for the second stand. The purpose of three-stand rolling is to apply inter-stand compressive stresses σ _P1 and σ _P2 between stands 1 and 2 and between stands 2 and 3 to further increase the width at the second stand.

In addition, the third stand has the effect of adjusting the cross-sectional shape of the product of the second stand (see cross-section B--B in FIG. 1). Therefore, the minimum required number of stands in the case of tandem rolling is two types: the second stand and the third stand.

FIG. 4 shows an example of narrowing the width by three-stand rolling, where the inclination angle α is less than or equal to the critical angle α ^* . In this case, inter-stand tensile stresses σ _f1 and σ _f2 are applied. Also, as in FIG. 3, the third stand has the effect of modifying the cross-sectional shape. Therefore, in this case as well, the minimum required number of stands in the normal case is two.

Since the present invention is configured and operated as described above, the inclination angle α of the inclined rolls is changed in one rolling mill row, so that width changing rolling for either expanding or reducing the width of the plate material is possible. It is possible and has great industrial value.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the widening rolling method according to the present invention;
a is a plan view, b is a sectional view along A-A, c is a sectional view along B-B, and FIG. 2 is a diagram showing the relationship between width ratio and inclination angle.
FIG. 3 is a diagram showing an example of a stand arrangement for widening rolling, and FIG. 4 is a diagram showing an example of a stand arrangement for narrowing width rolling. 1... Inclined rolling roll (left roll), 2... Inclined rolling roll (right roll), 3... Pass line,
4...Material, 5...Finished product, α...Inclination angle (direction in the figure is positive).

Claims (1)

[Scope of Claims] 1 A plurality of rolling rolls are disposed with their axes parallel or substantially parallel to the surface of the rolled plate material in the width direction of the rolled plate material, and the rolling direction of the rolling rolls is parallel to the rolling direction of the rolled plate material. A width adjustment rolling method characterized by adjusting the width of the plate after rolling by adjusting the corners. 2 A plurality of rolling rolls are disposed with their axes parallel or substantially parallel to the surface of the rolled plate material in the width direction of the rolled plate material, and means for changing the angle formed by the rolling rolls with the rolling direction. A width-adjustable rolling mill is provided.