Patent · US Expired

Method of and apparatus for hydraulically deforming a pipe-shaped hollow member

US5107693A · kind A · utility

42Cited by

9References

8Claims

0Family size

Assignee

Benteler Aktiengesellschaft · US

Inventors

Egon Olszewski · Paderborn, DE
Rainer Hansen · Paderborn, DE
Dieter Topker · Paderborn, DE

Key dates

Filing date	May 23, 1991
Grant date	Apr 28, 1992
Priority date	—
Expiry date	May 23, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49805
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A die (2) formed of two halves (4, 5) is placed in a container (7) filled with an incompressible liquid. The die halves have a plane of contact disposed in parallel relation with and spaced from the axis of a hollow member to be deformed within a die cavity formed by the die halves. Mandrils (15) are forced into sealing contact with the open ends of the hollow member by hydraulic cylinders. A high deformation pressure is supplied into the hollow member and the mandrils are secured in sealing contact with the hollow member against such pressure.

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