METHOD FOR DEFORMING THROUGH HIGH INNER PRESSURE AT LEAST TWO HOLLOW BODIES HAVING EACH AT LEAST ONE OPENING, ESPECIALLY METAL TUBES OR METAL HOLLOW PROFILES

Title:

METHOD FOR DEFORMING THROUGH HIGH INNER PRESSURE AT LEAST TWO HOLLOW BODIES HAVING EACH AT LEAST ONE OPENING, ESPECIALLY METAL TUBES OR METAL HOLLOW PROFILES

Document Type and Number:

WIPO Patent Application WO2000010746

Kind Code:

A3

Abstract:

The invention relates to a method for deforming through high inner pressure at least two hollow bodies (2, 3) having each at least one opening, especially metal tubes or metal hollow profiles. A theoretical rupture point (11) is first defined in the external wall (2a) of said first hollow body (2), in the connection area (V) where said first hollow body (2) is to be subsequently connected to said second hollow body (3). Then, the relevant outer wall (2a) of said first hollow body is further enlarged in the aforementioned connection area (V) of the two hollow bodies (2, 3) by means of a hydraulic pressure medium. If a burst pressure is exceeded (Pb), the pressure medium expands in the second hollow body (3) until optional deformation through high inner pressure or connection of said first hollow body (2) to said second hollow body (3) is obtained.

Inventors:

BOEHM ALFONS (DE)

Application Number:

PCT/DE1999/002431

Publication Date:

June 08, 2000

Filing Date:

August 04, 1999

Export Citation:

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Assignee:

SIEMPELKAMP PRESSEN SYS GMBH (DE)
BOEHM ALFONS (DE)

International Classes:

B21C37/29; B21D26/035; B21D26/037; B21D39/04; (IPC1-7): B21D26/02; B21D39/04

Foreign References:

EP0593950A1	1994-04-27
DE19730481C1	1998-07-09
DE19618626A1	1997-11-13
US5445001A	1995-08-29
DE19647962C1	1998-04-16

Other References: