EP 3858509 A1 20210804 - METHOD AND ASSEMBLY FOR FORMING AN ANNULAR OBJECT
Title (en)
METHOD AND ASSEMBLY FOR FORMING AN ANNULAR OBJECT
Title (de)
VERFAHREN UND ANORDNUNG ZUR HERSTELLUNG EINES RINGFÖRMIGEN GEGENSTANDES
Title (fr)
PROCÉDÉ ET ENSEMBLE DE FORMATION D'UN OBJET ANNULAIRE
Publication
Application
Priority
US 202016779986 A 20200203
Abstract (en)
A method is provided for forming an annular object. This method includes: providing a frustoconical preform (104) extending axially along an axis (28), wherein a sidewall of the frustoconical preform (104) is angularly offset from the axis (28) by a preform angle (120); externally drawing the frustoconical preform (104) over an outer surface (34) of a punch (22) and an outer surface (80) of a die clamp (72) to provide an externally drawn body (122), wherein the outer surface (80) of the die clamp (72) is angularly offset from the axis (28) by a die clamp angle (82) that is different than the preform angle (120); mating a die (74) with the die clamp (72) to provide a die assembly (26), wherein the externally drawn body (122) is clamped radially between the die (74) and the die clamp (72); and translating the die assembly (26) axially along the axis (28) and into a bore (38) of the punch (22) to at least partially internally draw the externally drawn body (122) against an inner surface (36) of the punch (22).
IPC 8 full level
B21D 22/06 (2006.01); B21D 22/22 (2006.01); B21D 22/24 (2006.01); B21D 25/02 (2006.01); B21D 53/92 (2006.01)
CPC (source: EP US)
B21D 22/06 (2013.01 - EP); B21D 22/22 (2013.01 - EP); B21D 22/24 (2013.01 - EP); B21D 25/02 (2013.01 - EP US); B21D 53/92 (2013.01 - EP)
Citation (search report)
- [XI] WO 2015004152 A1 20150115 - LUDLOW MICHAEL [GB]
- [A] WO 2010003538 A1 20100114 - UNIV ULSTER [GB], et al
- [A] CN 109692911 A 20190430 - SHANGHAI AEROSPACE EQUIPMENTS MFT CO LTD
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 21154412 A 20210129; US 202016779986 A 20200203