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.:
Date of Patent:
Jul. 15, 2003
Filed:
Oct. 04, 2000
Applicant:
Inventors:
Peter Paul Masarczyk, Bochum, DE;
Thomas Struppek, Werne, DE;
Assignee:
Thyssen Krupp Stahl AG, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 1/902 ;
U.S. Cl.
CPC ...
G01N 1/902 ;
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 ( ) is clamped between two gripping jaws ( ) and drawn by a drawing device ( ), for preference at a constant drawing speed. During the drawing, the surface pressure (F )is continually increased. From the values allocated to the surface pressure (F )and to the drawing force (F ), applying the known formula &mgr;=F /F , the friction characteristics dependent on the surface pressure are calculated.