초록 ▼

A work roll crossing type rolling mill has back-up rolls arranged in such a manner that their axes are not inclined in a horizontal plane. Work rolls are constructed in such a manner that their axes can be inclined in a horizontal plane relative to the backup rolls such that the axes of the work rol

A work roll crossing type rolling mill has back-up rolls arranged in such a manner that their axes are not inclined in a horizontal plane. Work rolls are constructed in such a manner that their axes can be inclined in a horizontal plane relative to the backup rolls such that the axes of the work rolls cross the axes of the back-up rolls and such that the axes of the work rolls cross each other. A lubricant supply device is provided for supplying a lubricant between each work roll and each back-up roll combination to greatly reduce the thrust exerted to the work rolls, whereby the rolling mill is given an excellent ability of controlling the crown of the material to be rolled.

대표청구항 ▼

[ What is claimed is:] [1.] A rolling mill in which a pair of work rolls and a pair of back-up rolls for respectively supporting the work rolls are provided on a rolling stand and said work rolls are arranged such that their axes can be inclined in a horizontal plane such that a rolling of a materia

[ What is claimed is:] [1.] A rolling mill in which a pair of work rolls and a pair of back-up rolls for respectively supporting the work rolls are provided on a rolling stand and said work rolls are arranged such that their axes can be inclined in a horizontal plane such that a rolling of a material to be rolled is carried out with the axes of said work rolls crossing each other, wherein:said back-up rolls are arranged such that the axes of said back-up rolls are disposed in a horizontal plane and fixed in a direction substantially perpendicular to a direction of rolling of said material;said work rolls are supported such that respective angles of inclination of respective work rolls are controllable so that the axes of said work rolls cross the axes of said back-up rolls and also cross a line perpendicular to the direction of rolling of said material;said work rolls and said back-up rolls are arranged such that a first thrust force acts from each back-up roll to an associated work roll in a direction opposite to a direction in which a second thrust force acts from said material to the work roll so that an actual thrust force acting on the work roll is equal to a difference between said first and second thrust forces; anda lubricant supply device is provided for supplying an axial thrust reducing lubricant to a zone between each work roll having its axis crossing the axis of an associated back-up roll and the back-up roll with which said work roll is in direct contact, to thereby maintain axial thrust reducing lubrication in said zone, whereby the actual thrust force is reduced by the lubrication in said zone between the work roll and the back-up roll.