JPS60145208A - Roll bender device for rolling mill - Google Patents

Abstract

PURPOSE:To enable a work roll to perform bending and to reduce edge drops by applying a force of rolling direction to the rolling-contact surface at the axial ends of work roll and applying a bending force to the work roll by the component of said force. CONSTITUTION:Horizontal forces produced by cylinders 11 are transmitted to rolling bearings 8, 9 arranged at the rolling-contact surfaces of the axial ends of a pair of work rolls 1, 1. The bearings 8 contact only the upper roll 1, and the bearings 9 contact only the lower roll 1. Then a bending force is provided to the rolls 1, 1 by the wedge effects caused by the forces acting opposingly in the horizontal direction across a line which connects the axes of rolls 1, 1 to each other, to make the roll bending possible.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll bender device for a rolling mill that applies bending force to a work roll for a rolling mill.

Regarding conventional roll bender equipment for this type of rolling mill,
Taking an intermediate roll shift type six-heavy rolling mill as an example, a method was considered in which a bender was embedded in the work roll chock. However, in recent years, due to the small diameter of work rolls in order to improve the quality of rolled materials, it has become structurally impossible to embed a bender device in the work roll chock, or it has become difficult to secure space for the work roll chock itself. This point will be explained in detail using figures.

FIGS. 1 and 2 schematically show a conventional intermediate roll shift type small-diameter 6-heavy rolling mill. A pair of working wheels 1 are arranged facing each other in the center of the nousing.
These are supported in the axial direction by thrust bearings 6 without chocks, and further fixed to the housing by a front door 7.

Intermediate rolls 2 are arranged above and below the work roll 1, and backup rolls 6 are further arranged above and below this. However, since the work roll 1 is not provided with a chock, it is not possible to apply bending force to the work roll 1, resulting in a drawback that the shape control range is narrow.

In view of the above-mentioned drawbacks, an object of the present invention is to apply a force acting parallel to the rolling direction to the rolling surface of the shaft end of a work roll, and to provide a bender device for a work day using this vertical component force. It is in.

In order to achieve the above object, the present invention has been devised regarding a bearing support structure for work rolls.The present invention is characterized by a bearing support structure for a pair of work rolls. A roller bearing that contacts only the lower work roll and a roller bearing that contacts only the lower work roll are arranged, and the work roll is The reason is that bending force can be applied to the

The present invention will be explained below based on illustrated embodiments. 8th
5 to 5 are diagrams showing an embodiment of a roll bender device for a rolling mill according to the present invention. However, similar or identical components to those in FIGS. 1 and 2 are indicated using the same reference numerals.

A roller 9 with an eccentric inner race that contacts only the upper work roll is mounted on the transfer surface of the end of a pair of work rolls 8.
The eccentric roller of the inner race that contacts only the lower work roll is installed via a P bearing 9"ft: a common shaft 10T. 1 is a hydraulic cylinder that applies opposing forces to a pair of work rolls 1.

Next, the operation of this embodiment will be explained. When the cylinder 11 is actuated, the horizontal force generated thereby is transmitted to the bearings 8 and 9, and a bending force is generated on the work roll 1 due to the wedge effect, making roll bending possible.

As explained above, in the present invention, the bearings are not directly attached to the work rolls, but instead are provided with bearings that can be supported from the outside. This makes it possible to effectively bend the work rolls, thereby improving the shape of the rolled material.
In particular, it can greatly contribute to reducing edge drops.

[Brief explanation of drawings]

1 and 2 are schematic illustrations of a conventional small-diameter 6-heavy rolling mill, in which FIG. 1 is a front view, FIG. 2 is a side view, and FIGS. 3 to 5 are in accordance with the present invention. FIG. 8 is a side view, FIG. 4 is a front view, and FIG. 5 is a sectional view taken along line A-A in FIG. 4. It is. l...Work roll 2...Intermediate roll -8...
Side support roll 4...Side support bearing 5...Backup roll 6...Thrust bearing? '...Front door 8.9~
...Eccentric roller bearing lO...Common shaft 11...Hydraulic cylinder. Patent applicant: Kawasaki Steel Corporation

Claims (1)

[Claims] A roller bearing 9 that contacts only the upper work roll and a rolling bearing that contacts only the lower work roll are arranged on the shaft end transfer surfaces of the pair of work rolls, and a line connecting the axes of the work rolls is arranged. A roll bender device for a rolling mill, characterized in that a bending knife can be attached to the work roll by a wedge effect caused by forces applied in opposite horizontal directions.