JPS59209409A - rolling mill - Google Patents

Abstract

PURPOSE:To obtain a titled device capable of preventing a work roll from causing warp and a rolling material from running away in its width direction and stabilizing the shapes of its width ends, by providing an extending roll-barrel part to the outside of a groove of work roll, in a shift rolling by a grooved work roll. CONSTITUTION:An extending roll barrel part 4 having the same diameter as that of a grooved work roll 1 is provided to the outside of the groove 5 of roll 1. In a shift rolling by using the work roll 1, the runnaway of a rolling material 3 in its width direction and the meandering thereof are prevented because the roll shaft is prevented from causing warp by the barrel part 4; then the shapes of the width ends of material 3 are well stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling mill that can reliably control the shape of rolled material.

In recent years, in order to improve the shape in the rolling margin direction, a rolling mill has been developed in which the work rolls are shifted in the axial direction as shown in FIGS. 1 and 2.

In Figures 1 and 2, (a) and (a) are upper and lower work rolls,
(/I) (b) indicates a lower back-up roll, and (S) indicates a rolled material. This allows the material thickness distribution at the width end to be controlled.

However, when rolling the rolled material (S) with such a rolling mill,
If the rolled material (S) does not meander, rolling is performed well as shown in Fig. 1 (2), but if the rolled material (S) meander as shown in Fig. At (G), the work roll (in the case of Figure 2, the upper work roll (α)) is bent and the rolling +71 (S) escapes.
The shape of the rolled material (S) deteriorates.

The present invention has been made for the purpose of eliminating the above-mentioned drawbacks of the conventional means, and is provided with grooves on the outer periphery of a work roll that can be freely shifted in the axial direction at a predetermined position in the axial direction, It is characterized by having a rail part.

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

In Figures 3 and 4, (1) and (1) are upper and lower work rolls that can be shifted freely in the axial direction, (2) (2+ are upper and lower backup rolls, and the upper and lower work rolls (IH1'l) There are dents on the outer periphery during rolling (-roll contact area).
5) A groove +3) (3'l) is provided so that (5') is formed, and an extension roll barrel part (4) (4') is provided on the outside of the groove (3) (3') in the roll axis direction. is the provision.

During rolling, the upper and lower work rolls (1,) (1,) are softened in the axial direction, and one width end of the rolling 'rA' (S) is grooved (
3), and the other width end of the rolled material (S) is positioned near the center of the groove (3).
By (3), the width end wall thickness distribution can be controlled as shown in FIG.

When rolling is performed in such a state, both ends of the width end of the rolling +a' (S) are in contact with the upper and lower work rolls (11 (grabens (3) in contact with the straight part of 11) (also shown in Fig. 3 in the 3'l part). Therefore, even if the rolled material' (S) tries to meander during rolling, it will not meander as it will be obstructed by the walls of the grooves (3) (3) as shown in Figure 4, and the upper and lower work rolls (11 (
1) is also a bent and rolled material (S) as shown in Figure 2.
This can further prevent the tendency of the particles to escape to the outside. In addition, the extension roll barrel part (4) (4) is connected to the upper and lower backup rolls (
21 (Since it hits 21, the upper and lower work rolls (1)
The axis of (1) does not bend excessively even if the rolled material (S) comes out of the groove (31 (3')), and prevents the rolled material (S) from denting the roll contact area (51 (55)). Furthermore, the extension roll barrel section (4H4') prevents the upper and lower work rolls (
1) (]), up/down/pull up roll (2+ (2
') can be lowered over a wide area (two-distributed).

Note that the depth of the groove (31 (3'l) in the example of the present invention can be made deep or shallow depending on the situation. The gist of the invention is that the groove (31 (3')) may not be V-shaped but may be rounded or concave. Of course, various changes may be made within the range not departing from the above.

In the rolling mill of the present invention, the work roll, which can be shifted in the axial direction, is provided with a groove and an extension roll contact portion, so that the rolled material can be prevented from escaping in the width direction of the sheet, and as a result, the width end of the rolled material can be prevented from escaping in the width direction. An excellent effect can be achieved in that the shape can be stably controlled.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of a conventional rolling mill, and FIGS. 3 and 4 are detailed explanatory diagrams of the present invention. In the figure (lj (1) is the upper and lower work roll, (2r' (2
) are upper and lower backup rolls, (3) (3) are grooves, (
4) +4) is the extension roll barrel part, (5) (5) is the roll contact part dent. @Figure 2 Figure 3 Figure 4! ,

Claims (1)

[Claims] 1) A rolling mill characterized in that a groove is provided on the outer periphery of a work roll that can be freely shifted in the axial direction at a predetermined position in the axial direction, and an extension roll barrel portion is provided outside the groove.