A METHOD FOR FORGING A MAGNET WHEEL FOR A MOTOR VEHICLE ALTERNATOR, COLD FORGING DIE, AND MAGNET WHEEL OBTAINED BY MEANS OF THIS METHOD
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United States of America Patent
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Issued Date -
Jan 19, 2017
app pub date -
Mar 2, 2015
filing date -
Mar 5, 2014
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Abstract
The method according to the invention involves a hot-forging step and a cold-forging step that occurs after the hot-forging step. A polar wheel (10, 11) incorporating a plurality of finite chamfers (102) formed on exterior parts of the polar teeth (10g, 11g) is produced during the hot-forging step. According to the invention, the cold-forging step involves substeps of placing the polar wheel in a die, cold die-stamping the polar wheel with a first and a second blow in the axial direction of the polar wheel, upsetting material onto interior parts of the polar teeth (10g, 11g) so as to form magnet-housing grooves (100) and magnet lips (101).
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