EP 0110127 B1 19870701 - METHOD OF MANUFACTURING A COMMUTATOR COLLAR
Title (en)
METHOD OF MANUFACTURING A COMMUTATOR COLLAR
Publication
Application
Priority
DE 3242702 A 19821119
Abstract (en)
[origin: US4611391A] A method for manufacturing commutator segmental rings, in which ring-shaped blanks (1) are transformed into commutator segmental rings. The method is carried out with a forming apparatus which uses a ring-shaped die (21) and a rib-forming die (25) to transform the blank (1) into a commutator segmental ring (2) with a flange (4) on its end and a shaft portion (3) with commutator segments (5) and cross pieces (7) connecting them. During the forming process, the die (25) moves against the force of an adjustable elastic counter-pressure apparatus (16; 13, 17, 19; 28). The counter-pressure on the facing side (24) of the upper punch (22), on which the die (25) fits, minimizes formation of a burr on the workpiece, and it permits use of a fastening means of reduced clamping power, thereby according the die (25) a greater pressure stability.
IPC 1-7
IPC 8 full level
H01R 43/06 (2006.01); B21J 5/12 (2006.01); B21K 1/30 (2006.01); B21K 1/76 (2006.01); H01R 43/08 (2006.01); H02K 13/00 (2006.01)
CPC (source: EP US)
B21J 5/12 (2013.01 - EP US); B21K 1/30 (2013.01 - EP US); B21K 1/76 (2013.01 - EP US); H01R 43/08 (2013.01 - EP US); Y10T 29/49011 (2015.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0110127 A1 19840613; EP 0110127 B1 19870701; DE 3242702 A1 19840524; DE 3372260 D1 19870806; JP S59103541 A 19840615; US 4611391 A 19860916
DOCDB simple family (application)
EP 83110668 A 19831026; DE 3242702 A 19821119; DE 3372260 T 19831026; JP 21639683 A 19831118; US 55298483 A 19831117