Method and device for producing a metal strip for tailored blanks to be cut to length
AssigneeThyssen Krupp AG
InventorsRudolf Kawalla, Friedrich Behr, Hans-Peter Schmitz
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Abstract
The invention relates to a process for the production of tailored blanks by the hot rolling of a strip and to an apparatus for the performance of said process. To obtain tailored blanks to be cut to length from the rolled strip, the hot strip is cooled or heated in portions, so that with a substantially constant rolling force the strip undergoes a differential decrease in thickness in the individual portions, which have been given a differential yield stress value by the differential temperature adjustment.
Claims20
A method to transform a metal strip into tailored blanks by rolling, at least one rolling being a hot roll pass and the metal strip having portions of different thickness in longitudinal direction, the method comprising:
- adjusting the portions of the metal strip to different temperatures by cooling or heating said portions prior to the hot rolling pass of said metal strip, thereby producing the portions of different thickness;
- and;
- subjecting the portions of different thickness to a constant rolling force.
Dependencies are inferred from the claim text.