Patent · US Expired

Process for the determination of the friction properties of sheet metal during forming and the measuring apparatus for carrying out the process

US6591659B1 · kind B1 · utility

0Cited by

3References

12Claims

0Family size

Assignee

THYSSEN KRUPP STAHL AG · DE

Inventors

Peter Paul Masarczyk · Bochum, DE
Thomas Struppek · Werne, DE

Key dates

Filing date	Oct 4, 2000
Grant date	Jul 15, 2003
Priority date	—
Expiry date	May 25, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01N19/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a process and a measuring apparatus for determining the friction characteristics of sheet metal during forming. To do this, a strip-shaped sample of sheet metal (1) is clamped between two gripping jaws (2, 3) and drawn by a drawing device (9), for preference at a constant drawing speed. During the drawing, the surface pressure (FN)is continually increased. From the values allocated to the surface pressure (FN)and to the drawing force (FZ), applying the known formula &mgr;=FR/FN, the friction characteristics dependent on the surface pressure are calculated.

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