Escher Wyss Limited

Sulzer-escher Wyss Limited

Sulzer-escher Wyss Ag

Heinz Guttinger

Eugen Schnyder

Josef Mercx

Hugo Feldman

Adolf Glattfelder

A method of operating a controlled deflection roll having a stationary roll support or beam and a roll shell or jacket rotatable about the stationary roll support. The rotatable roll shell is supported in relation to the stationary roll support by means of hydrostatic pressure elements. The roll shell is displaceably guided in guides in relation to the stationary roll support for movement in a press or pressure plane. Between the rotatable roll shell and the stationary roll support, supporting or carrier members are operated and regulated for taking-up the inherent weight of the rotatable roll shell within the range of mobility of the rotatable roll shell in relation to the stationary roll support or beam.

Method of operating a controlled deflection roll and a rolling mill

A controlled deflection roll contains a stationary roll support or beam and a roll shell or jacket rotatable about the stationary roll support. The rotatable roll shell is supported upon the stationary roll support by means of hydrostatic support or pressure elements. The roll shell is displaceably guided in guides in relation to the stationary roll support for movement in a press or pressure plane. Between the rotatable roll shell and the stationary roll support there are arranged supporting or carrier members which are suitable for taking-up the inherent weight of the rotatable roll shell within the range of mobility of the rotatable roll shell in relation to the stationary roll support or beam.

Controlled deflection roll

In rolling metal foils, such as aluminum foils, especially very thin foils in the range down to 10 .mu.m, an improved uniformity of the foil thickness over the width of the foil sheet and, simultaneously, greater rolling speeds of the foil sheet are obtained by operating the rolling apparatus at a working point of the rolling force/material-working or line force/deformation characteristic curve which lies below the saturation region in which, while the material-working or deformation is nearly independent of the rolling or line force, the rolling or pulling speed is determined by other parameters and can not be varied. The thickness variations occurring under this selection of the working point and due to variations in the rolling or line force over the width of the rolls are compensated by regulating the rolling or line force such that the thickness reduction is constant over the width of the sheet or has a desired profile of variation. This can be obtained by, for instance, constructing one or more of the rolls as a controlled deflection roll provided with a series of pressure or support elements having regulatable pressing forces distributed over the width of the roll.

Method and apparatus for rolling metal foils

The controlled deflection roll comprises a stationary, non-rotating roll support member and a roll shell mounted to rotate about the stationary roll support member. The roll shell is not directly supported at the stationary roll support member by means of hydraulic support elements, but through the intermediary of additionally provided traveling rings each of which defines a travel path for the related hydraulic support element. The traveling rings have an outer diameter slightly smaller than the inner diameter of the roll shell and they are arranged to be rotatable independently of the roll shell. During operation of the controlled deflection roll the traveling rings, therefore, roll along the inner surface of the roll shell. As a result, the flexibility of the roll shell is improved in circumferential direction as well as transversely to the pressing line of the controlled deflection roller. In this arrangement stiffness of the roll shell in circumferential direction is insured by the traveling rings. Undue deformations of the roll shell are thereby prevented and the force requirements are reduced.

An arrangement for regulating a rolling mill for metal rolling, the work rolls of which are supported by guided roll shells of a lower controlled deflection roll and an upper controlled deflection roll, the roll shells being supported by means of hydrostatic pressure or support elements upon a related roll support or beam. First regulation circuits are provided for regulating the pressure of the pressure or support elements of the controlled deflection rolls. A second regulation circuit for the position of the roll shells overrides the first regulation circuits, so that adjustment output magnitudes of the second regulation circuit can be impressed as reference or set values or adjustment magnitudes upon the first regulation circuits. There is also provided a third regulation circuit for the rolling force or the roll nip which overrides the second regulation circuit, so that the adjustment output magnitude of the third regulation circuit can be impressed as a reference or set value or adjustment magnitude upon the second regulation circuit.

Arrangement for regulating a rolling mill for metal rolling

A rolling mill is disclosed containing a roll stand equipped with two work rolls which are braced at back-up or support rolls which can be constructed as controlled deflection rolls. The work rolls are equipped at their opposed ends with bending devices for applying a bending moment. Simplified designs of the rolling mill contemplate constructing one of the back-up or support rolls as a solid roll. Furthermore, one of the work rolls can be omitted.

Rolling mill

A rolling device is shown, having two press rollers of which at least one is a deflection equalizing roller. The equalizing roller has a support, support elements and a roller shell rotating around the support which is displaceable relatively to the support in a plane containing the axes of the rolls. In order to reduce the deflection of the supports under the stress produced during use by the support elements the supports are secured in the side panels and without clearance, stiffened against bending. Therefore, the supports and both the side panels form together a force locked construction being firm against bending.

Rolling device

In a support element with a flexible or inclinable head portion which faces a surface which is to be supported, the head portion is able to adapt to any changes in shape or position in order to maintain a parallel gap between the surface and the head portion. In order to support the head portion towards the surface which is to be supported, at least one pressure chamber is provided which can be acted upon by a pressure medium so that the force produced by this action of pressure medium acts on the head portion in the direction stated. A measuring device is provided, for measuring the size of the gap between the head portion and the surface to be supported. The pressure in the pressure chamber is regulated as a function of the measured size of the gap.

Growing community of inventors

Schaffhausen, Switzerland

Heinz Guttinger