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:
Sep. 06, 2011
Filed:
Jan. 14, 2005
Ewald Hagen, Langenfeld, DE;
Arnold Schwippe, Leverkusen, DE;
Andreas Wershofen, Grevenbroich, DE;
SMS Eumuco GmbH, Leverkusen, DE;
Abstract
The invention relates to a method for adjusting the position of a mandrel (), which is situated in a hydraulic punch consisting of a cylinder and a ram that form a mandrel cylinder (), in an extrusion press for producing pipes (), which are extruded from blocks () that are loaded into a receiving device () situated upstream of the extrusion press () and are punched using the mandrel (). The invention is characterised in that the mandrel cylinder () is driven directly by pumps (), which are set for a pre-calculated throughput that is dependent on the press speed, and that an additional throughput is added to the pre-calculated pump throughput. To adjust the position of the mandrel (), a control valve () that acts on the ring side () of the mandrel () is connected to a tank ().