Rolling mill
AssigneeSulzer-Escher Wyss GmbH
InventorEugen Schnyder
Life of this patent
Estimating the term…
Abstract
In a rolling mill containing two work rolls and, as desired, supporting or back-up rolls, a rapid adjustment of the roll gap or nip with elimination of effects due to elastic elongation of the roll framework or stand is achieved in that when structuring at least one of the rolls as a controlled deflection roll containing a stationary roll support and a rotatable roll shell rotating thereabout, there is measured the position of the inner side or surface of the roll shell and an automatic control serves to adjust or readjust the roll gap or nip by causing changes in the pressure exerted upon the hydrostatic supporting or pressure elements placed intermediate the stationary roll support and the rotatable roll shell.
Claims18
A rolling mill for rolling web-like materials, comprising:
- a roll stand;
- two work rolls mounted in said roll stand;
- two supporting rolls cooperating with said work rolls and mounted in said roll stand;
- said two work rolls forming a roll nip therebetween and defining a pressing plane in which said work rolls act upon said material;
- at least one of said rolls being structured as a controlled deflection roll comprising a stationary roll support supported in said roll stand and a rotatable roll shell rotatable about said stationary roll support;
- said rotatable roll shell having an inner surface facing said stationary roll support and two opposite end portions and being displaceable in said pressing plane;
- hydrostatic support elements acted upon by a pressurized fluid medium and supporting said rotatable roll shell at said stationary roll support;
- a reference member connected with said roll stand;
- at least one position transmitter for generating an output signal and serving to directly measure the position of said inner surface of said roll shell in said pressing plane at a side thereof facing said roll nip relative to said reference member;
- control means responsive to said output signal of said position transmitter for adjusting said hydrostatic support elements and in turn a predetermined thickness of said web-like material being processed in said roll nip between said work rolls;
- whereby said output signal of said position transmitter influences the pressure of the pressurized fluid medium acting upon said hydrostatic support elements by means of said control means such that said rotatable roll shell assumes a predetermined position.
A rolling mill for rolling web-like materials, comprising:
- a roll stand;
- two work rolls mounted in said roll stand;
- said two work rolls forming a roll nip therebetween and defining a pressing plane in which said work rolls act upon said material;
- at least one of said two work rolls being structured as a controlled deflection roll comprising a stationary roll support supported in said roll stand and a rotatable roll shell rotatable about said stationary roll support;
- said rotatable roll shell having an inner surface facing said stationary roll support and two opposite end portions and being displaceable in said pressing plane;
- hydrostatic support elements acted upon by a pressurized fluid medium and supporting said rotatable roll shell at said stationary roll support;
- a reference member connected with said roll stand;
- at least one position transmitter for generating an output signal and serving to directly measure the position of said inner surface of said roll shell in said pressing plane at a side thereof facing said roll nip relative to said reference member;
- control means responsive to said output signal of said position transmitter for adjusting said hydrostatic support elements and in turn a predetermined thickness of said web-like material processed in said roll nip between said work rolls;
- whereby said output signal of said position transmitter influences the pressure of the pressurized fluid medium acting upon said hydrostatic support elements by means of said control means such that said rotatable roll shell assumes a predetermined position.
Dependencies are inferred from the claim text.