Patent · US Expired

Method of using profiles, and producing metal sheets with stepped cross-sections and different wall thicknesses

US6070448A · kind A · utility

6Cited by

6References

4Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Konrad Eipper · Herrenberg, DE
Wolfgang Fussnegger · Rohrau, DE
Christoph Schlott · Sindelfingen, DE

Key dates

Filing date	Sep 9, 1996
Grant date	Jun 6, 2000
Priority date	—
Expiry date	Sep 9, 2016

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21B2015/0078
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

In a method of using a closed, extruded profile, developing a hollow profile and producing a stepped cross-sectional metal sheet with different wall thicknesses, the profile or the hollow profile is used as a starting material for rolling. The hollow profile has only one wall, which turns back in on itself in the peripheral direction without branching and is of different thicknesses at different points of the periphery. The hollow profile is separated along a surface line, is formed into the semifinished article and is subsequently rolled to produce the metal sheet.

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