Method for manufacturing pipe
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasahiko Asano, Yoshihiko Ukai
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a pipe includes: press-forming a plate member into a U shape; and press-forming the plate member formed into the U shape into an O shape. The pipe includes a pipe body and a tapered part tilted radially inward and protruding from one end of the pipe body. Before the plate member is press-formed into the U shape, a boundary between a portion of the plate member corresponding to the pipe body and a portion of the plate member corresponding to the tapered part is pressed from a surface of the plate member corresponding to an inner peripheral surface of the pipe to bend the portion of the plate member corresponding to the tapered part toward the surface of the plate member corresponding to the inner peripheral surface of the pipe.
Claims8
A method for manufacturing a pipe having a pipe body and a tapered part tilted radially inward and protruding from one end of the pipe body, the method comprising:
- press-forming a plate member into a U shape;
- press-forming a groove into a boundary between a portion of the plate member corresponding to the pipe body and a portion of the plate member corresponding to the tapered part at a surface of the plate member corresponding to an inner peripheral surface of the pipe to bend a portion of the plate member corresponding to the tapered part toward the surface of the plate member corresponding to the inner peripheral surface of the pipe;
- and
- press-forming the plate member formed into the U shape into an O shape.
Dependencies are inferred from the claim text.