发明申请
US20110214474A1 METHOD OF MANUFACTURING A TUBULAR MEMBER 有权
制造管状构件的方法

METHOD OF MANUFACTURING A TUBULAR MEMBER
摘要:
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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