JPS58176006A - Rolling method - Google Patents

Abstract

PURPOSE:To correct the shape and the crown, etc. of a composite plate of material to be rolled, by skewing a left-and-right divided-type intermediate roll, provided to the space between a work roll and a back-up roll, with respect to the axial line of the work roll. CONSTITUTION:A left-and-right divided-type intermediate roll 3 is provided to the space between a work roll 1 and a back-up roll 2. The roll 3 is made possible to skew with respect to the axial line of the roll 1 by supporting one end at the side where respective rolls of the roll 3 are mutually opposing with the aid of a movable intermediate universal box 4. Intersecting points O of both axial lines of the rolls 3 and that of the roll 1 are positioned on the quaternary points of a material 7 to be rolled to roll the material 7. Thus the shape and the crown, etc. of the composite plate of the material 7 are corrected, and the product accuracy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling method that allows complete modification of the composite plate shape, composite plate crown, etc.

Conventional four-high rolling mills use a work roll bending method or a method of providing an initial crown on the rolls to control the shape of the rolled material, but both have limits in control ability, so they are simply used to control the shape of rolled material. It was possible to control only the elongation, but not the part of the quarter (the part between the middle elongation and the edge Iφ).

In view of such circumstances, the present invention provides a system in which a left-right split intermediate roll that can be skewed with respect to the work roll axis is installed between the work roll and the backing roll of a rolling mill, and the bath intermediate roll is skewed. The object of the present invention is to provide a rolling method that allows modification of the composite plate shape, composite plate crown, etc. by rolling a rolled material.

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

FIGS. 1 and 2 show a rolling mill for carrying out the rolling method of the present invention, in which (1) is a work roll and (2) is a backing roll. Upper work roll (or lower work roll) (
1) and the upper hold-down roll (or lower hold-down roll) (2), a left-right split type intermediate row novel 3), (3) is arranged, and one end of the opposite side of the bath intermediate roll (3) is connected to the housing. An end flexible shaft box (5) is supported by an intermediate flexible shaft box (4) which is movably provided through an arm (6), and the other end of the bath intermediate roll (3) is movably provided in the housing. The intermediate rolls (3) are configured to be skewable with respect to the axis of the upper work roll (1). Visit, axle box (4), (5)
A bearing such as a spherical bearing that can tilt the axis of rotation is provided inside.

In such a configuration, when rolling a rolled material (7) in the shape of a composite plate having mid-elongation and edge elongation, each intermediate roll (3) is raster-skewed as shown in FIG.
) The intersection O between the axis and the axis of the work roll (1) is positioned above a part of the quarter of the rolling material (7), and this state is maintained to perform the rolling operation.

In this way, a stronger rolling load is applied to the quarter part than to the middle elongation and end elongation parts of the rolled material, so the elongation of the quarter part increases and the thickness is the same as that of the middle elongation part and end elongation part. It is possible to modify the plate thickness so that it has a suitable thickness.

In addition, the intersection O is located close to the center, and the work roll (1
) can be prevented from quarter elongation of the rolled material (7) by applying tickle bending (bending that gives a concave crown to the roll).

Similarly, the present invention may be used in combination with bending control, and a greater effect will be exhibited if it is applied to double-size rolling.

As described above, according to the present invention, the left-right split intermediate roll arranged between the work roll and the backing roll is skewed so that it intersects with the work roll axis at a predetermined position corresponding to the shape of the rolled material. Since the rolled material is rolled in this state, the composite plate shape, composite plate crown, etc. of the rolled material can be corrected, and the product accuracy of the rolled material can be improved, and other excellent effects can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a rolling mill for implementing the method of the present invention, and FIG. 2 is a front view of FIG. 1. (1)...Work roll, (2)...Backup roll, (
3)...Intermediate roll, (7)...Rolled material. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) A left-right split intermediate roll is disposed between a work roll and a backing roll of a rolling mill, and the rolled material is rolled with the bath intermediate roll skewed with respect to the axis of the work roll. rolling method.