EP 0849013 B1 20010411 - Advanced forming techniques for superplastic forming
Title (en)
Advanced forming techniques for superplastic forming
Title (de)
Verbesserte Formtechnik für superplastische Formung
Title (fr)
Technique de formage améliorée pour le formage superplastique
Publication
Application
Priority
US 77372896 A 19961221
Abstract (en)
[origin: EP0849013A1] This application describes a method for superplastic forming (SPF) of metallic parts in which a cutout is formed in the blank from which the parts will be formed, and a secondary sheet is located between the blank and the pressurized gas. The cutout area of the blank becomes stretched so that there is minimal thinning in the area near the periphery of the cutout(s) in the blank, the secondary sheet is required to carry the gas pressure and to form the parts. <IMAGE> <IMAGE> <IMAGE>
IPC 1-7
IPC 8 full level
B21D 26/055 (2011.01)
CPC (source: EP US)
B21D 26/055 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0849013 A1 19980624; EP 0849013 B1 20010411; CA 2221076 A1 19980621; DE 69704541 D1 20010517; DE 69704541 T2 20010809; US 5862695 A 19990126
DOCDB simple family (application)
EP 97203563 A 19971114; CA 2221076 A 19971114; DE 69704541 T 19971114; US 77372896 A 19961221