Patent · US Expired

Device and method for reshaping bar-shaped materials particularly for drawing and extruding

US7257979B2 · kind B2 · utility

0Cited by

5References

24Claims

0Family size

Assignee

BL Chemie GmbH & Co., KG · DE

Inventors

Werner Witte · Unna, DE
Lothar Illgen · Iserlohn, DE
Peter Bilstein · Menden, DE

Key dates

Filing date	Oct 21, 2002
Grant date	Aug 21, 2007
Priority date	—
Expiry date	Feb 24, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH02K41/025
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

An apparatus for reforming rod-shaped, electrically conductive and/or magnetizable materials, in particular for drawing and extruding, having the following features: the apparatus has a female mold having a die, which forms the tool for reforming; the apparatus has an inductor of an electric linear motor, by means of which a traveling electric field can be produced; the inductor includes at least one first group at least with first coils; the first coils in the first group are arranged axially next to one another and thus form a channel; using the inductor it is possible to produce a traveling field in the channel which has a magnetic flux density having a gradient in the axial direction of the channel, which has an amplitude of greater than B=1 T.

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