Method for the manufacture of a machine part having external toothing
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Feb 18, 1997
filing date -
Feb 15, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for the manufacture of a machine part with external toothing from a circular sheet metal blank. According to this method the blank is fixed between a tool and a tail stock. Subsequently the circumferential edge of the circular sheet metal blank is bent by a first metal working roll towards the side of the tool by an angle of more than 180.degree. to form a curl. This curl is radially flattened with a second metal working roll. Subsequently the flattened curl is pressed against the tool with a gear cutting roll and shaped to form an external tooth system.
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