Patent ID: 7600312
Filing Date: 2009-10-13
Classification: B21D,H01F,H02K,Y10T

Abstract:
1. A die assembly for manufacturing lamina stacks from a strip of substantially planar material, comprising: at least one die station including a lamina interlock feature punch configured to punch a lamina interlock feature in the strip; at least one forming station including at least one forming tool configured to form a non-interlocking lamina portion in the strip which is disposed outwardly of the plane of the strip; a blanking station including a blanking punch configured to blank individual laminas from the strip; and a choke assembly including a choke cavity configured to receive individual laminas blanked from the strip, wherein said blanking station includes at least one staking punch, each staking punch engageable with a respective lamina interlock feature in the strip to interlock a blanked lamina with a previously blanked lamina in said choke assembly substantially concurrently with blanking the blanked lamina from the strip.