Hydroformed tubular member and method of hydroforming tubular members
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United States of America Patent
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Apr 17, 2001
Grant Date -
N/A
app pub date -
Aug 25, 1998
filing date -
Aug 25, 1998
priority date (Note) -
Expired
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Abstract
Tubular members for use in vehicle frames are easily and economically produced using a hydroforming process in which a high pressure fluid is presented to the interior of a tubular member, thus causing the tube to expand to meet the interior walls of a forming die. Tubular members can be formed having significant variations in their circumference, diameter along their lengths, or gage along their lengths by using a stamped blank having a predetermined shape which is formed into a preformed tube which roughly mirrors the shape of the desired finished tubular member.
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