JPS6352962B2 - - Google Patents

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 of rolled material in the width direction, a rolling mill that shifts the work rolls in the axial direction as shown in FIGS. 1 and 2 has been developed. 1st
In the figure and Fig. 2, a, a' are upper and lower work rolls, b,
b' indicates upper and lower back-up rolls, and S indicates 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, but if the rolled material S meandered as shown in FIG. Then, the work roll (in the case of Fig. 2, the upper work roll a) is bent at the overhanging part C, and the rolled material S escapes.
The shape of the rolled material S deteriorates.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks of the conventional means.In addition to providing 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, an extension roll barrel portion is provided outside the groove. It is characterized by the fact that it has been provided.

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

In FIGS. 3 and 4, 1 and 1' are upper and lower work rolls that can be freely shifted in the axial direction, 2 and 2' are upper and lower back-up rolls, and the upper and lower work rolls 1 and 1' are
Grooves 3, 3' are provided on the outer periphery at required positions in the axial direction of the roll so that recesses 5, 5' are formed in the roll contact areas during rolling.
Extension roll barrel sections 4, 4' are provided.

During rolling, the upper and lower work rolls 1, 1' are shifted in the axial direction, one width end of the rolled material S is positioned near the center of the groove 3, and the other width end of the rolled material S is placed near the center of the groove 3'.
be located near the center of the area. By means of these grooves 3, 3', the width end wall thickness distribution can be controlled as shown in FIG.

When rolling is carried out in such a state, both width ends of the rolled material S come into contact with the straight parts of the upper and lower work rolls 1 and 1', as well as with the grooves 3 and 3', as shown in FIG. Therefore, even if the rolled material S tries to meander during rolling, it will not meander as it will be hindered by the walls of the grooves 3 and 3' as shown in FIG.
1' is not bent as shown in FIG. 2, and the tendency of the rolled material S to escape further can be prevented. or,
Since the extension roll barrels 4, 4' are in contact with the upper and lower back up rolls 2, 2', the axes of the upper and lower work rolls 1, 1' do not move excessively even if the rolled material S comes out into the grooves 3, 3'. It does not bend and prevents the rolled material S from escaping into the recesses 5 and 5' at the roll contact area. Furthermore, the extension roll barrel parts 4, 4' are connected to the upper and lower work rolls 1,
1', the surface pressure of the upper and lower back-up rolls 2, 2' can be distributed over a wide area and lowered.

Note that the depth of the grooves 3 and 3' in the embodiment of the present invention can be made deep or shallow depending on the situation, and that the dents at the roll contact area may become voids due to the deformation load during rolling as in the present embodiment. The grooves 3 and 3' may be formed into a rounded recess instead of being V-shaped, and various other changes may be made without departing from the gist of the present invention. Of course.

In the rolling mill of the present invention, the work roll that can be shifted in the axial direction is provided with a groove and an extension roll barrel 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 drawings]

1 and 2 are explanatory diagrams of a conventional rolling mill, and FIGS. 3 and 4 are explanatory diagrams of a rolling mill of the present invention. In the figure, 1 and 1' are upper and lower work rolls, 2 and 2' are upper and lower back-up rolls, 3 and 3' are grooves, 4 and 4' are extension roll barrel parts, and 5 and 5' are depressions at the roll contact area.

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.