EP 0019472 A2 19801126 - Manufacturing commutator shells for rotating electric machines.
Title (en)
Manufacturing commutator shells for rotating electric machines.
Title (de)
Herstellung von Kommutatorschalen für rotierende elektrische Maschinen.
Title (fr)
Fabrication de coquilles de collecteurs pour machines électriques tournantes.
Publication
Application
Priority
GB 7917477 A 19790518
Abstract (en)
Shells for commutators are made by performing a number of forming operations on stock metal strip before the strip is cut into lengths and rolled into a cylinder. A roller (14) forms parallel transverse grooves (18) and ribs (19) in one side of the strip. Punches (26) cut slots (27) in alignment with the grooves (18) to form fingers along one edge of the strip. Knives (32) skive under the ribs (19) to form anchors (41). Then the strip is cropped into lengths by a punch (43), bent into a cylinder by a two-stage press and forced through a tapered sizing die (61). All operations are performed in automatic sequence on a multi-stage slide press machine.
IPC 1-7
IPC 8 full level
H01R 39/04 (2006.01); H01R 43/06 (2006.01); H01R 43/08 (2006.01)
CPC (source: EP)
H01R 43/06 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR IT LU NL SE
DOCDB simple family (publication)
EP 0019472 A2 19801126; EP 0019472 A3 19810107; EP 0019472 B1 19840229; AT E6449 T1 19840315; DE 3066742 D1 19840405; GB 2049496 A 19801231; GB 2049496 B 19821027
DOCDB simple family (application)
EP 80301610 A 19800516; AT 80301610 T 19800516; DE 3066742 T 19800516; GB 7917477 A 19790518