Method of manufacturing a tubular member
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United States of America Patent
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Jul 21, 2015
Grant Date -
Sep 8, 2011
app pub date -
May 16, 2011
filing date -
Nov 18, 2008
priority date (Note) -
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Abstract
A method of manufacturing a tubular member having a non-constant thickness by ironing at least a portion of the tubular material. The ironing apparatus can have a punch and a die, and the die can have a convex and concave side surface opposing the punch. The method can include bending an axial end portion of the tubular material to form a bent portion. The tubular material can then axially engage the die at the bent portion, and then the punch can be moved relative to the die to iron at least a portion of the tubular material.
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