EP 0873437 A1 19981028 - METHOD OF PRODUCING A SPINNING OR TWISTING RING, AND A SPINNING OR TWISTING RING PRODUCED BY THE METHOD
Title (en)
METHOD OF PRODUCING A SPINNING OR TWISTING RING, AND A SPINNING OR TWISTING RING PRODUCED BY THE METHOD
Title (de)
VERFAHREN ZUM FORMEN EINES SPINN- ODER ZWIRNRINGES SOWIE NACH DEM VERFAHREN GEFORMTER SPINN- ODER ZWIRNRING
Title (fr)
PROCEDE DE FABRICATION D'UN ANNEAU DE FILAGE OU DE RETORDAGE ET ANNEAU DE FILAGE OU DE RETORDAGE FA ONNE SELON CE PROCEDE
Publication
Application
Priority
- CH 9600459 W 19961223
- CH 369095 A 19951228
Abstract (en)
[origin: WO9724477A1] In the method proposed, a disc-shaped blank (12) is stamped from a steel sheet (10), a bulge (16) produced in the middle, and the disc deep-drawn to form a cup-shaped blank. The bulge is subsequently pressed flat, pushing material out to the edge where a flange will be formed. The flattened floor of the cup is then stamped out and a flange (70) formed on the blank (12d) by a stamping and deep-drawing tool (68), the flange being shaped by a stamping tool to form the finished flanged ring. This method enables chip-removing machining operations to be avoided, thus reducing manufacturing costs.
IPC 1-7
IPC 8 full level
B21D 53/16 (2006.01); D01H 7/60 (2006.01)
CPC (source: EP)
B21D 53/16 (2013.01); D01H 7/602 (2013.01)
Citation (search report)
See references of WO 9724477A1
Designated contracting state (EPC)
CH DE GB GR IT LI
DOCDB simple family (publication)
WO 9724477 A1 19970710; CH 690779 A5 20010115; CN 1082105 C 20020403; CN 1202938 A 19981223; DE 59609165 D1 20020606; EP 0873437 A1 19981028; EP 0873437 B1 20020502; HK 1017028 A1 19991112; JP 2000502758 A 20000307; JP 3954104 B2 20070808; TR 199801231 T2 19981021
DOCDB simple family (application)
CH 9600459 W 19961223; CH 369095 A 19951228; CN 96198587 A 19961223; DE 59609165 T 19961223; EP 96942229 A 19961223; HK 99102064 A 19990507; JP 52394497 A 19961223; TR 9801231 T 19961223