Method of manufacturing magnetic cores for dynamoelectric machines and laminations therefor
Abstract
Abstract A METHOD OF MANUFACTURING MAGNETIC CORES SUCH AS STATOR CORES FOR DYNAMOELECTRIC MACHINES AND THE METHOD OF MANUFACTURING THE STATOR LAMINATIONS THAT FORM THE MAGNETIC CORE. IN PERFORMING THE METHOD OF THIS INVENTION A LENGTH OF STEEL TUBING IS FORMED TO PROVIDE A PART THAT HAS A CONCAVE INNER WALL AND A CONVEX OUTER WALL. THIS PART IS THEN FOLDED SUCH THAT HALF SECTIONS OF THE CONCAVE INNER WALL ARE FORCED TOGETHER TO FORM AN ANNULAR DISK. IN PRACTICING THE METHOD OF THIS INVENTION IT IS POSSIBLE TO SIMULTANEOUSLY FOLD AND COIN THE METAL PART TO THEREBY PROVIDE A LAMINATION WHICH IS USEFUL IN FORMING A FINISHED MAGNETIC CORE. AS AN ALTERNATIVE TO THIS METHOD THIS INVENTION CONTEMPLATES FOLDING THE METAL MATERIAL WITHOUT COINING, STACKING THE ANNULAR DISKS FORMED BY THE FOLDING OPERATION AND THEN COINING THE STACKED LAMINATIONS TO FORM A FINISHED STATOR CORE. FOLLOWING THE FOLDING OF THE METAL MATERIAL OR FOLLOWING THE SIMULTANEOUS FOLDING AND COINING OF THE METAL MATERIAL THE DISK IS PROVIDED WITH SLOTS FOR RECEIVING A STATOR WINDING. THE METHOD OF THIS INVENTION REDUCES THE AMOUNT OF SCRAP PRODUCED AS COMPARED TO CONVENTIONAL METHODS OF FABRICATING STATOR LAMINATIONS AND STATOR CORES.
Inventors
- 👤 David E Givan
Bibliographic Details
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