Patent · US Expired

Transfer device in a metal-forming machine

US5617756A · kind A · utility

7Cited by

6References

4Claims

0Family size

Assignee

SCHULER PRESSEN GMBH · DE

Inventors

Karl Thudium · Lorch, DE
Peter Klemm · Stuttgart, DE
Hans Hofele · Göppingen, DE

Key dates

Filing date	May 17, 1995
Grant date	Apr 8, 1997
Priority date	—
Expiry date	May 17, 2015

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21D43/05
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

In the case of transfer presses and similar metal-forming machines, transfer devices must be provided for the transport of the sheet metal parts through the metal-forming stages. The lifting and lowering movement should be freely programmable, yet, a drive for the lifting and lowering movement is to be permitted which is free from play. This is achieved by the use of servo motors or similar motors with a hollow-shaft rotor and high-resolution position generators for the direct application on the transfer device, in which case the hollow-shaft rotor of each of the servo motors is provided with a spindle nut which, interacts with a spindle which is fastened on the transfer device in a non-rotatable manner.

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