Global Patent Index - EP 0849013 B1

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


EP 0849013 B1 20010411 (EN)


EP 97203563 A 19971114


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

B21D 26/02

IPC 8 full level

B21D 26/055 (2011.01)

CPC (source: EP US)

B21D 26/055 (2013.01 - EP US)

Designated contracting state (EPC)


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