Strip threading speed controlling apparatus for tandem rolling mill
AssigneeKabushiki Kaisha Toshiba
InventorsHiroyuki Imanari, Masashi Tsugeno
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Abstract
A strip threading speed controlling apparatus for a tandem rolling mill is constructed to calculate a speed set value of two adjacent rolling stands by using a forward slip predicted considering a back tension without considering a front tension in an upstream-side rolling stand thereof, and a forward slip predicted without considering the tension in a downstream-side rolling stand, and to calculate the speed set value of each rolling stand by shifting the rolling stands stage by stage.
Claims8
A strip threading speed controlling apparatus for a tandem rolling mill, having a series of rolling stands arranged in tandem, each including a speed controller for controlling a rotating speed of each roll, for threading a rolled material sequentially through said series of rolling stands and rolling the rolled material, said apparatus comprising:
- set up calculation means for calculating speed set values of two rolling stands adjacent to each other by use of a forward slip predicted in consideration of a back tension without considering a front tension in an upstream-side rolling stand of said two rolling stands, and a forward slip predicted without considering tension in the downstream-side rolling stand, and thereafter calculating the speed set value of each of said rolling stands by shifting said rolling stands stage by stage;
- and
- set up execution means for distributing the speed set value calculated by said set up calculation means to a corresponding speed controller.
A strip threading speed controlling apparatus for a tandem rolling mill, having a series of rolling stands arranged in tandem, each including a speed controller for controlling a rotating speed of each roll, for threading a rolled material sequentially through said series of rolling stands and rolling the rolled material, said apparatus comprising:
- tension predicting means for sorting out and storing measured values of tensions between said rolling stands after threading a rolled material, and predicting a tension of a next rolled material by collating with a rolling condition of the next rolled material;
- set up calculation means for calculating a speed set value by use of a forward slip predicted in consideration of an influence of a back tension predicted by said tension predicting means without considering an influence of a front tension in an upstream-side rolling stand of said two rolling stands adjacent to each other, and a forward slip predicted without considering the influence of tension in the downstream-side rolling stand;
- and
- set up execution means for supplying said speed controller with a speed command based on the speed set value.
A strip threading speed controlling apparatus for a tandem rolling mill, having a series of rolling stands arranged in tandem, each including a speed controller for controlling a rotating speed of each roll, for threading a rolled material sequentially through said series of rolling stands and rolling the rolled material, said apparatus comprising:
- a calculator configured to calculate speed set values of two rolling stands adjacent to each other by use of a forward slip predicted in consideration of a back tension without considering a front tension in an upstream-side rolling stand of said two rolling stands, and to calculate a forward slip predicted without considering tension in the downstream-side rolling stand, and thereafter to calculate the speed set value of each of said rolling stands by shifting said rolling stands stage by stage;
- and
- an execution device configured to distribute the speed set values calculated by said calculator to a corresponding speed controller.
A strip threading speed controlling apparatus for a tandem rolling mill, having a series of rolling stands arranged in tandem, each including a speed controller for controlling a rotating speed of each roll, for threading a rolled material sequentially through said series of rolling stands and rolling the rolled material, said apparatus comprising:
- a tension predictor configured to sort out and store measured values of tensions between said rolling stands after threading a rolled material, and to predict a tension of a next rolled material by collating with a rolling condition of the next rolled material;
- a calculator configured to calculate a speed set value by use of a forward slip predicted in consideration of an influence of a back tension predicted by said tension predicting means without considering an influence of a front tension in an upstream-side rolling stand of said two rolling stands adjacent to each other, and to calculate a forward slip predicted without considering the influence of tension in the downstream-side rolling stand;
- and
- an execution device configured to supply said speed controller with a speed command based on the speed set value.
Dependencies are inferred from the claim text.