EP 2842649 A1 20150304 - A method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts
Title (en)
A method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts
Title (de)
Verfahren zum Walzen/Fliesspressen mit geregeltem Achsabstand von axialsymmetrisch gestuften Teilen
Title (fr)
Procédé de laminage à régulation d'espacement à axe régulé de parties étagées à axes symétriques
Publication
Application
Priority
PL 40429413 A 20130612
Abstract (en)
The way of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts is characterized in that a formed semi-finished product ( 3 ) in the form of a bar or tube part is placed in the seat of the front rotary holder ( 1 ) and in the seat of the back rotary holder (2 ), next, the front rotational holder ( 1 ) and back rotational holder ( 2 ) together with semi-finished product ( 3 ) move with a translational motion with constant velocity ( V ) into the workspace, which is made by the same three ( 4a ), ( 4b ) and ( 4c ) formed rolls, next the same three ( 4a ), ( 4b ) and ( 4c ) formed rolls are put into rotational motion in the same direction and with the same velocity ( n 1 ), then revolution motion of the same three ( 4a ), ( 4b ) and ( 4c ) formed rolls is activated with the velocity ( n 2 ) and the same three ( 4a ), ( 4b ) and ( 4c ) formed rolls are brought closer to the semi-finished product ( 1 ), yet rotary movement trajectories ( 7a ), ( 7b ) and (7 c ) of the same three ( 4a ), ( 4b ) and ( 4c ) formed rolls are of spiral shape, next the semi-finished product ( 3) is affected by the ( 4a ), ( 4b ) and ( 4c ) formed rolls working ( 4a 1 ), ( 4a 2 ), ( 4b 1 ), ( 4b 2 ), ( 4c 1 ) and ( 4c 2 ) surfaces and the semi-finished product ( 3 ) is put into rotary motion with constant velocity ( n 3 ) in the direction opposite to the direction of rotations of the same three ( 4a ), ( 4b ) and (4 c ) formed rolls.
IPC 8 full level
B21D 22/14 (2006.01); B21H 1/18 (2006.01)
CPC (source: EP)
B21D 22/14 (2013.01); B21H 1/18 (2013.01)
Citation (applicant)
- PL 392275 A1 20120312 - LUBELSKA POLT [PL]
- PL 393242 A1 20120618 - LUBELSKA POLT [PL]
- BARTNICKI. J; PATER Z.: "Cross-wedge processes of hollowed products", 2005
Citation (search report)
- [A] US 2003140674 A1 20030731 - SUZUKI YUKINORI [JP], et al
- [AD] EP 2422896 A1 20120229 - LUBELSKA POLT [PL]
- [A] JP S58110137 A 19830630 - TOKYO SHIBAURA ELECTRIC CO
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)
EP 2842649 A1 20150304; EP 2842649 B1 20160518; PL 224268 B1 20161230; PL 404294 A1 20141222
DOCDB simple family (application)
EP 13461569 A 20131230; PL 40429413 A 20130612