Method of producing laminated iron cores
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United States of America Patent
Stats
-
Apr 13, 2004
Grant Date -
Aug 22, 2002
app pub date -
Jan 16, 2002
filing date -
May 18, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of producing a laminated iron core by punching and laminating rotor and stator core pieces. The rotor core pieces are punched from a metal sheet and laminated. Magnetic pole teeth are roughly punched in the metal sheet with the rotor core pieces removed. Each of a plurality of magnetic pole teeth are pressed at plural different portions to form thin parts so as to develop the plurality of magnetic pole teeth toward the punched side of the rotor core piece. Thereafter, the stator core piece is punched to form front tips on the magnetic pole teeth defining an internal form on the stator core piece. An external form of the stator core piece is punched. The punched stator core pieces are laminated in succession.
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