Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Reissue Patent
2002-04-15
2011-12-13
Jones, David B (Department: 3725)
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
C072S060000, C029S421100
Reissue Patent
active
RE043012
ABSTRACT:
A method is disclosed for stretching magnesium-containing aluminum alloy sheet stock into intricate shapes such as are required in automotive body panels. The sheet stock, at a temperature in the range of about 400° C. to about 510° C., is stretched under the pressure of a working gas into conformance with the surface of a forming tool. The sheet forming pressure is increased continually in a controlled manner from ambient pressure to a final forming level in the range of about 250 psi to about 500 psi or higher. A portion of the sheet can experience strain rates substantially higher than 10−3sec−1and the forming of the sheet can be completed within 12 minutes.
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Kim Chongmin
Kim Soo-ho
Krajewski Paul E.
Rashid Moinuddin S.
Rashid, legal representative Kulsum
GM Global Technology Operations LLC
Jones David B
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