Hot blow forming method for aluminum alloy sheet
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United States of America Patent
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Oct 20, 2020
Grant Date -
Nov 30, 2017
app pub date -
Apr 21, 2015
filing date -
Nov 24, 2014
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Abstract
A hot blow forming method for the aluminum alloy sheet carries out a hot blow forming to an aluminum alloy sheet using a first metal mold being a female mold for forming having a protruding surface portion on an inside surface thereof and a second metal mold for gas introduction. Immediately prior to the hot blow forming, a temperature (T1) of the aluminum alloy sheet and a temperature (T2) of the first metal mold satisfy a relation (T1)-(T2)≥30° C. and the temperature (T2) is equal to or higher than 400° C. In the hot blow forming, the aluminum alloy sheet is made to be brought into contact with at least a part of the protruding surface portion of the first metal mold within 30 seconds from a start of the gas introduction from the second metal mold.
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