EP 0504039 B1 19951227 - Method and device to produce an annular workpiece of sheetmetal
Title (en)
Method and device to produce an annular workpiece of sheetmetal
Title (de)
Verfahren und Vorrichtung zur Herstellung eines ringförmigen Werkstückes aus Blech
Title (fr)
Procédé et outillage de fabrication d'une pièce annulaire en tÔle
Publication
Application
Priority
FR 9103066 A 19910314
Abstract (en)
[origin: EP0504039A1] The invention permits the manufacture of annular components such as shroud collars on which machining is to be carried out. The method consists in bending a presized metal sheet by means of a series of internal bearing elements (8) mounted on a rotary plate (6) and by means of a pressure roller (4) bearing on the outer surface of the metal sheet (2). A complete rotation of the rotary plate (6) permits the complete bending of the metal sheet (2) into the shape of a shroud collar. The second main operation consists in carrying out, on the device itself, the welding operation for joining the two ends (1, 3) of the metal sheet (2). This method enables any prior machining to be carried out on the presized flat metal sheet, without these machining operations being impaired by the bending or welding operation. Application to the manufacture of front casing collars shroud surrounding the colder duct of a bypass turbojet. <IMAGE>
IPC 1-7
IPC 8 full level
B21D 5/14 (2006.01); B21D 51/10 (2006.01)
CPC (source: EP US)
B21D 5/143 (2013.01 - EP US); B21D 51/10 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0504039 A1 19920916; EP 0504039 B1 19951227; DE 69207034 D1 19960208; DE 69207034 T2 19960530; FR 2673863 A1 19920918; FR 2673863 B1 19950519; US 5341665 A 19940830
DOCDB simple family (application)
EP 92400625 A 19920311; DE 69207034 T 19920311; FR 9103066 A 19910314; US 85029492 A 19920312