Patent · US Expired

High-pressure bulge-forming apparatus

US6591650B2 · kind B2 · utility

4Cited by

5References

6Claims

0Family size

Assignee

Schuler Hydroforming GmbH & Co. KG · DE

Inventors

Bernd Engel · Stuttgart, DE
Michael Schierz · Freudenberg, DE
Matthias Prier · Wilnsdorf, DE

Key dates

Filing date	Nov 5, 2001
Grant date	Jul 15, 2003
Priority date	—
Expiry date	Nov 5, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49444
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A high-pressure bulge-forming apparatus has a multipart die having a cavity adapted to receive a hollow workpiece and having ends oppositely open along an axis. Respective actuators aligned with the cavity ends have stems extending axially toward the cavity. Respective heads on the ends are engageable in the cavity with ends of the workpiece. One of the stems and the respective head is formed with a passage opening axially into the workpiece engaged by the respective head. Fasteners releasable secure the heads on the stems. Each head comprises an end part with an inwardly tapered outer surface and a base part fixed to the respective stem and carrying the respective head. In addition each head has a normally annular mounting plate between the respective base part and end part.

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