Strip tension profile apparatus and associated method
AssigneesWean United Rolling Mills, Inc., International Rolling Mill Consultants, Inc.
InventorVladimir B. Ginzburg
Life of this patent
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Abstract
A rolling mill strip tension controlling apparatus may also function as a looper roll and shape meter and is provided with a plurality of generally aligned axially rotatable strip contacting rolls which are supported on rotating arms which in turn are rotated by actuators such as hydraulic cylinders. By monitoring actuator pressure and position a difference between the actual values for position or pressure and the predetermined values is used to provide through a servomechanism suitable corrective action on an individual roll by roll basis. A switch may be provided to permit the system to provide information from a computer to the servo system in a position mode or a pressure mode. The measured values may take the form of oscillations with respect to a predetermined base value.
Claims35
Rolling mill strip tension apparatus comprising
- a plurality of axially rotatable strip contacting rolls for contacting portions of said strip across said strip,
- support means for supporting said rolls,
- actuator means for each of said rolls for individually positioning said rolls,
- position sensing means for determining the position of said actuator means and emitting a corresponding position signal,
- pressure sensing means for determining the pressure in said actuator means and emitting a corresponding pressure signal,
- computer means for receiving said position signals and said pressure signals and determining the strip tension signals profile and position signals from said strip contacting rolls,
- said computer means having a first mode which provides predetermined positions of the strip contacting rolls and determines the strip tension profile as a function of said strip tension signals and a second mode which provides predetermined strip tension for each contacting roll and determines strip tension profile as a function of the positions of said strip contacting rolls, and
- servo means for adjusting the position of said actuator means when a predetermined tension does not exist in said strip portions adjacent said rolls.
A method of controlling rolling mill strip tension profile comprising
- providing a plurality of independent strip contacting rolls which are axially rotatable and each supported independently by support means which are mounted for rotation, actuator means for rotating said roll support means,
- determining at least one function of strip tension with respect to each said roll, and
- comparing said functions for each said roll with respect to desired values of said functions, and when a predetermined departure from desired values exist effecting on a roll by roll basis a change in the position of the actuator means operatively associated with each said roll.
Dependencies are inferred from the claim text.