logo

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10118213 B1

PDFFull Text
Date of Patent:
Nov. 06, 2018

Filed:

Aug. 27, 2015

Method of forming a sheet steel workpiece

Applicants:

Thyssenkrupp Steel Europe Ag, Duisburg, DE;

Thyssenkrupp Ag, Essen, DE;

Inventors:

Stéphane Graff, Unna, DE;

David Pieronek, Dortmund, DE;

Markus Zörnack, Lake Orion, MI (US);

Assignees:

THYSSENKRUPP STEEL EUROPE AG, Duisburg, DE;

THYSSENKRUPP AG, Essen, DE;

Attorney:

thyssenkrupp North America, Inc.

Primary Examiner:

Bayan Salone

Int. Cl.
CPC ...
B21B 1/38 (2006.01); B21D 22/02 (2006.01); B21D 35/00 (2006.01); B21D 39/03 (2006.01); B21D 53/30 (2006.01); C21D 1/06 (2006.01); C21D 6/00 (2006.01); C21D 1/673 (2006.01); C21D 7/02 (2006.01);
U.S. Cl.
CPC ...
B21D 53/30 (2013.01); B21B 1/38 (2013.01); B21D 22/022 (2013.01); C21D 1/06 (2013.01); C21D 1/673 (2013.01); C21D 6/00 (2013.01); C21D 7/02 (2013.01); B21D 35/001 (2013.01); B21D 35/007 (2013.01); B21D 39/031 (2013.01); Y10T 29/49524 (2015.01); Y10T 29/49526 (2015.01); Y10T 29/49529 (2015.01); Y10T 29/49531 (2015.01);
Abstract

The invention relates to a method for the forming of a workpiece, in particular a blank, composed of sheet steel, in which method the following steps are performed in succession: providing a workpiece composed of multiple steel layers which have been non-detachably connected to one another by roll-bonding and of which at least two steel layers have a different strength and/or elongation at fracture, heating the workpiece, and subjecting the workpiece to hot forming. To ensure a high strength and at the same time the easiest possible formability, the invention proposes that at least one section of the hot-formed workpiece is hardened, and that the workpiece is subsequently subjected to cold forming in the region in which the hardening has been performed. The invention also relates to a corresponding workpiece.

Find Patent Forward Citations

Loading…