Patent ID: 8720039

Claim:
A laminated core punching apparatus, comprising: an uncoiler for unwinding a strip-form steel plate for an iron core, which strip-form steel plate is wound into a coil shape and set on the uncoiler; a rotor-punching press machine for punching out a rotor core piece from the strip-form steel plate and laminating the punched rotor core piece; and a stator-punching press machine for punching out a stator core piece from the strip-form steel plate following punching of the rotor core piece and laminating the punched stator core piece, wherein the rotor-punching press machine includes a molding die that performs partial punching gradually to approach a shape of the rotor core piece, a punching die for punching out the rotor core piece from the strip-form steel plate, and two rotor lamination stations for laminating the punched rotor core piece such that when a punching operation is underway in one of the rotor lamination stations, a punching operation in the other rotor lamination station is stopped, and in the rotor lamination station where punching is stopped, a rotational buildup operation for rotating a rotor laminated body, obtained by laminating the rotor core piece, by a predetermined angle in a circumferential direction of the rotor laminated body can be performed, the stator-punching press machine includes a molding die that performs partial punching gradually to approach the shape of the stator core piece, a punching die for punching out the stator core piece from the strip-form steel plate, and two stator lamination stations for laminating the punched stator core piece such that when a punching operation is underway in one of the stator lamination stations, a punching operation in the other stator lamination station is stopped, and in the stator lamination station where punching is stopped, a rotational buildup operation for rotating a stator laminated body, obtained by laminating the stator core piece, by a predetermined angle in a circumferential direction of the stator laminated body can be performed, the rotor-punching press machine and the stator-punching press machine are constructed to perform the punching operations synchronously, and means for causing the strip-form steel plate to hang down in a loop, provided between the rotor-punching press machine and the stator-punching press machine for adjusting a length of the strip-form steel plate between the two press machines, and the means for causing the strip-form steel plate to hang down in a loop including means for guiding a loop locus of the strip-form steel plate from above so that the loop of the strip-form steel plate does not invert, the guiding means being disposed above the loop, the guiding means being capable of ascending and descending.