Metallic member forming method
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United States of America Patent
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N/A
Issued Date -
Mar 4, 2004
app pub date -
Sep 4, 2002
filing date -
Sep 4, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A metallic member forming method capable of achieving both formability of a metallic member and highly strengthening same. Cylindrical metallic member 1 having a hollow space 10 and forming die 3 having a forming face 31 are used. Metallic member 1 is heated up to a temperature range capable of quench-reinforcing (e.g., not less than A1 transformation point). By increasing internal pressure of gas contained in the hollow space 10 of the metallic member 1 a wall 1a of the metallic member 1 is bulged and/or deformed, and the bulged, deformed wall 1a of the metallic member 1 is deformed by bringing it into intimate contact with the forming face 31 of the forming die concurrently with quench-reinforcing it. High strengthening of the metallic member 1 is achieved.
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