EP 1466680 A1 20041013 - Method for forming of tubular work-pieces using a segmented tool
Title (en)
Method for forming of tubular work-pieces using a segmented tool
Title (de)
Verfahren zum Umformen von rohrförmigen Werkstücken mit einem segmentierten Werkzeug
Title (fr)
Procédé de formage de pièces tubulaires utilisant un outil segmenté
Publication
Application
Priority
SE 0301056 A 20030409
Abstract (en)
The hydroforming tool of the present invention comprises a pair of upper and lower tool inserts (B) having open axial ends and defining an elongated cavity there between when said tool inserts are forced together. The upper and/or lower tool inserts are composed of segments that are attached to the upper and a lower base plates, (A), by bolts. Retaining elements, such as pins, are introduced into holes in the base plates and continues into cavities (D) formed in the segmented inserts. This prevents the insert segments from moving during the forming operation. In this way the use of base blocks may be omitted. Sometimes the friction force acting between the base plate and segmented inserts, caused by the high pressure applied to the tool surfaces, is sufficient to prevent the separation of the segments, whereby the segments are kept in place without the use of retaining elements. <IMAGE>
IPC 1-7
IPC 8 full level
B21D 26/047 (2011.01)
CPC (source: EP)
B21D 26/047 (2013.01); B21D 37/02 (2013.01)
Citation (search report)
- [X] DE 19854114 A1 20000525 - VOLKSWAGEN AG [DE]
- [A] DE 19618626 A1 19971113 - DAIMLER BENZ AG [DE]
- [A] US 6164108 A 20001226 - BROWN JAMES H [US], et al
- [A] US 5815901 A 19981006 - MASON MURRAY R [CA], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1466680 A1 20041013; EP 1466680 B1 20070103; AT E350178 T1 20070115; DE 602004003986 D1 20070215; DE 602004003986 T2 20070426; PL 1466680 T3 20070531; SE 0301056 D0 20030409
DOCDB simple family (application)
EP 04101367 A 20040402; AT 04101367 T 20040402; DE 602004003986 T 20040402; PL 04101367 T 20040402; SE 0301056 A 20030409