LAMINATED IRON CORE, METHOD AND DIE MACHINE FOR MANUFACTURING THE SAME

摘要

- 25- ABSTRACT LAHINATED I RON CORE, METHOD AND D I E HAC H I N E FOR HANUFACTURING THE SAME IN A LAMINATED IRON CORE FORMED BY STACKING A 5 PLURALITY OF IRON CORE PIECES PUNCHED OUT FROM A THIN STEEL SHEET MATERIAL, EACH OF SAID PLURALITY OF IRON CORE PIECES INCLUDING A PLURALITY OF SLOT HOLES 4A FOR RECEIVING COIL WINDINGS, AT LEAST ONE ELECTRICALLY INSULATING SHEET PIECE IS STACKED ON AN OUTER SURFACE OF IO A LOWERMOST IRON CORE PIECE, SAID SLOT HOLES HAVING A SUBSTANTIALLY S.LMILAR CONFIGURATION TO SAID SLOT HOLES OF THE IRON CORE PIECE BUT HAVING SMALLER SIZE THAN SAID SLOT HOLES OF THE IRON CORE PIECES SUCH THAT EDGES OF THE SLOT HOLES OF THE ELECTRICALLY INSULATING SHEET PIECE ,5 EXTEND OUTWIARDLY BEYOND EDGES OF THE SIOT HOLES OF THE IRON CORE PIECES. WHEN A COIL IS WOUND INTO THE SLOT HOLES OF THE IRON CORE PIECES BURRS FORMED AT THE EDGES OF THE EDGES OF THE SLOT HOLES OF THE IRON CORE PIECES ARE COVERED WITH THE EDGES OF THE SLOT HOLES OF THE 20 ELECTRICALLY INSULATING SHEET PIECE SO THAT THE COIL CAN BE WOUND SAFELY WITHOUT BEING BROUGHT INTO DIRECT CONTACT WITH THE BURRS. SELECTED DRAWING: FIG. 2