METHOD FOR MANUFACTURING BAND-SHAPED STATOR CORE SHEETS AND DIE APPARATUS USED THEREFOR

摘要

Provided are a method for manufacturing band-shaped stator core sheets, capable of efficiently separating the band-shaped stator core sheets having engaged magnetic pole pieces, and a die apparatus used therefor.;The method comprises placing tips of magnetic pole pieces 12, 13 of first and second band-shaped stator core sheets 10, 11 on inner peripheries of yoke pieces 16, 15, a slot punching step for forming gaps of the magnetic pole pieces 12, 13, a shear-cutting step for cutting the tips of the magnetic pole pieces 12, 13 from the inner peripheries of the yoke pieces 16, 15, respectively, a correction step for returning the magnetic pole pieces 12, 13 bent by the shear-cutting step to their original states, and a separation step for separating the first and second band-shaped stator core sheets 10, 11 with the magnetic pole pieces 12, 13 pressed back by the correction step.

主权项

1. A method for manufacturing band-shaped stator core sheets by performing blank layout such that a magnetic strip material includes at least two rows of first and second band-shaped stator core sheets with magnetic pole pieces of the first and second band-shaped stator core sheets engaged with one another and thereafter separating the first and second band-shaped stator core sheets from the magnetic strip material by press work, the method comprising:
placing tips of the respective magnetic pole pieces of the first band-shaped stator core sheet on an inner periphery of a yoke piece between adjacent ones of the magnetic pole pieces of the second band-shaped stator core sheet, and placing tips of the respective magnetic pole pieces of the second band-shaped stator core sheet on an inner periphery of a yoke piece between adjacent ones of the magnetic pole pieces of the first band-shaped stator core sheet; a slot punching step for punching out slots to form gaps of the respective magnetic pole pieces of the first and second band-shaped stator core sheets; a shear-cutting step for shear-cutting the tips of the respective magnetic pole pieces of the first and second band-shaped stator core sheets from the inner peripheries of the yoke pieces; a correction step for returning the magnetic pole pieces of the first and second band-shaped stator core sheets having been bent by the shear-cutting step to their original states; and a separation step for separating the first and second band-shaped stator core sheets with the magnetic pole pieces having been pressed back by the correction step.