EP 3253509 A1 20171213 - METHOD AND DEVICE FOR FORMING A COLLAR ON A WORKPIECE
Title (en)
METHOD AND DEVICE FOR FORMING A COLLAR ON A WORKPIECE
Title (de)
VERFAHREN UND VORRICHTUNG ZUM AUSKRAGEN EINES WERKSTÜCKS
Title (fr)
PROCÉDÉ ET DISPOSITIF POUR RÉALISER UN REBORD AU NIVEAU D'UNE PIÈCE
Publication
Application
Priority
- DE 102015101717 A 20150206
- EP 2016052042 W 20160201
Abstract (en)
[origin: WO2016124528A1] The present invention relates to a method for producing a collar on a workpiece. The object of easily achieving great collar lengths with good quality and even when using high-strength metals, in particular high-strength steels, is achieved by the method comprising the following steps: pre-forming a region of the workpiece to form a material reserve for a collar-drawing operation, drawing the workpiece to form a collar, wherein the drawn workpiece has a flange region and a drawn region adjoining the flange region, wherein the drawn region comprises a wall region and a drawn base adjoining the wall region, and wherein at least some of the material from the region of the material reserve serves for forming the wall region, punching the drawn base located in the drawn region of the workpiece, such that an opening is made in the drawn base and the wall region is adjoined by a drawn-base subregion, and widening the drawn-base subregion. The present invention also relates to a device for producing a collar on a workpiece.
IPC 8 full level
B21D 19/08 (2006.01); B21D 22/22 (2006.01); B21D 24/16 (2006.01)
CPC (source: CN EP US)
B21D 19/088 (2013.01 - CN EP US); B21D 22/08 (2013.01 - US); B21D 22/22 (2013.01 - CN EP US); B21D 24/16 (2013.01 - CN EP US); B21D 22/30 (2013.01 - US)
Citation (search report)
See references of WO 2016124528A1
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)
DE 102015101717 A1 20160811; CN 107206452 A 20170926; CN 107206452 B 20200714; EP 3253509 A1 20171213; EP 3253509 B1 20190904; US 10118211 B2 20181106; US 2018036784 A1 20180208; WO 2016124528 A1 20160811
DOCDB simple family (application)
DE 102015101717 A 20150206; CN 201680009133 A 20160201; EP 16702528 A 20160201; EP 2016052042 W 20160201; US 201615548374 A 20160201