To provide a forming method of a pipe-shaped product by which a tube stock is housed in a die, contracted by applying fluid pressure to the interior of the tube stock and strength and rigidity are improved by simple constitution and the pipe-shaped product.
By this forming method of the pipe-shaped product, a pipe contracting part 10' is formed by preliminarily forming an indended part 10 toward the inside from the outside of the tube stock 1, housing the tube stock 1 in the die 60 and applying the fluid pressure to the interior of a tube stock 1. The pushed-in part 10 is preliminarily formed partially in the axial direction of the tube stock 1, only such a part is contracted and the expanded parts 11' are formed in the axial direction other than the part where the pushed-in part 10 of the tube stock 1 is preliminarily formed.
HIRAMATSU KOICHI
Miyazaki Yoshio
Kaoru Onozuka
High Masahiro
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