Patent ID: 6588093
Filing Date: 2003-07-08
Classification: H01F,Y10T

Abstract:
A method for manufacturing packets of linked sheet metal laminations for a magnetic core, comprising the steps of:successively punching a plurality of laminations from a sheet metal strip including, for each of said laminations, punching a depression at a first side of each lamination and a projection at a second, opposite side of each lamination, said depressions and projections coinciding with each other in position; forming said projections as at least two circular nipples on each lamination and pressing said at least two circular nipples into respective depressions in an adjacent lamination to stack said laminations in a packet; in each packet, in one lamination, punching only cylindrical holes and disposing said one lamination at one side of said packet as a separating lamination, with said at least two circular nipples of an adjacent lamination engaging said cylindrical holes; and successively cutting said laminations from said strip with respectively different widths and joining said laminations to form said packet with a substantially round cross-section.