Patent · US Active

Hot-formed metal sheet and method of producing an opening in such a metal sheet

US11027325B2 · kind B2 · utility

0Cited by

3References

5Claims

0Family size

Assignee

BENTELER AUTOMOBILTECHNIK GMBH · DE

Inventors

Markus Kettler · Paderborn, DE
Georg Frost · Steinheim, DE
Frank Rabe · Erlangen, DE
Karsten Bake · Delbrück, DE

Key dates

Filing date	Dec 21, 2017
Grant date	Jun 8, 2021
Priority date	—
Expiry date	May 15, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC21D2261/00
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hot-formed metal sheet has a tensile strength Rm>1300 megapascal (MPa) and includes an opening which is produced by high-speed punching at a speed of a punch of more than 6 m/s in the absence of a counter holder of a contour matching a contour of the punch, with a smooth cut proportion of the cutting surface of the opening amounting to more than 50%.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.