EP 0190640 A3 19870401 - PRESSING CONTOURED SHAPES
Title (en)
PRESSING CONTOURED SHAPES
Publication
Application
Priority
GB 8502772 A 19850204
Abstract (en)
[origin: EP0190640A2] A process for forming superplastically deformable sheet metal into contoured shapes, especially complex saddle shapes having compound curvature, utilises the technique of pressure forming in combination with a forming tool with the sheet metal in condition for superplastic deformation. A preform of superplastically deformable sheet metal is first formed and then sealed to a pressure box. A forming tool is engaged with the preform face external of the pressure box and, under conditions for superplastic deformation, the sheet metal is pressure-formed into conformity with the forming tool. Apparatus for performing the process is also disclosed.
IPC 1-7
IPC 8 full level
B21D 22/20 (2006.01); B21D 26/055 (2011.01)
CPC (source: EP)
B21D 26/055 (2013.01)
Citation (search report)
- [Y] CH 611815 A5 19790629 - T I SUPERFORM LTD [GB]
- [Y] GB 2096513 A 19821020 - SUPERFORM METALS LTD
- [A] US 3974673 A 19760817 - FOSNESS JOHN P, et al
- [A] DE 2839469 A1 19800320 - ROCKWELL INTERNATIONAL CORP
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0190640 A2 19860813; EP 0190640 A3 19870401; GB 8502772 D0 19850306; JP S61182826 A 19860815
DOCDB simple family (application)
EP 86101065 A 19860127; GB 8502772 A 19850204; JP 2189286 A 19860203