Molding method by forging and molding method for case
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United States of America Patent
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Issued Date -
Jan 11, 2007
app pub date -
Apr 16, 2004
filing date -
Apr 16, 2004
priority date (Note) -
Abandoned
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Abstract
A material member blanked from metal sheet is subjected to upsetting to form an annular peripheral portion that is thinner than the center part of the material inside the annular portion, and the thicker inside portion is formed into a concavity. The first intermediate product thus formed is drawn to form a cup-shaped case with an internal boss and/or an external boss, and an outside flange. The intermediate product can also be used to make gears and the like.
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