Metal deforming – By use of roller or roller-like tool-element – With carrier for roller-couple or tool-couple
Patent
1988-05-09
1990-02-27
Bray, W. Donald
Metal deforming
By use of roller or roller-like tool-element
With carrier for roller-couple or tool-couple
291132, 291162, 100162B, B21B 3132, B21B 1300
Patent
active
049035177
ABSTRACT:
The operation of a calender or a like machine with at least one pair of rolls which define an elongated nip and wherein at least one of the rolls is a so-called bending compensation roll is regulated by a computer which transmits signals to adjustable pressure regulating valves in conduits serving to admit pressurized fluid to a plurality of actuators (such as hydrostatic bearing elements and hydraulic cylinder and piston units for the bending compensation roll) which can alter the load parameter (such as the line load or the compressive strain) in discrete zones of the nip. The computer has inputs for signals which indicate the temperature in the nip, for signals which indicate the characteristics of the web that is advanced through the nip, and for signals from a memory for a pressure reaction matrix. The pressure of fluid is regulated in such a way that changes of the actual value of load parameter in a selected zone of the nip do not entail any changes, or do not entail any appreciable changes, in other zones of the nip.
REFERENCES:
patent: 4394793 (1983-07-01), Pav et al.
patent: 4425489 (1984-01-01), Pav et al.
patent: 4457057 (1984-07-01), Pav
patent: 4729153 (1988-03-01), Pav et al.
patent: 4791863 (1988-12-01), Vahatalo
Haag Rolf van
Schmidt Rainer
Bray W. Donald
Kleinewefers GmbH
Kontler Peter K.
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