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AssigneeMitsubishi Heavy Industries, Ltd.
InventorsNobutaka Nakajima, Yoshinori Okamura, Takahisa Hasegawa, Hirokazu Kadowaki
Estimating the term…
A tube expansion method of mounting a drain tube as tube member by insertion and expansion to a through hole in which opening portions at both ends are obliquely formed, the method including: inserting the drain tube to the through hole so that the end portions protrude from the opening portions at both ends of the through hole; inserting a tube expander into the drain tube to expand the drain tube up to a predetermined inner diameter while moving the tube expander to the other end portion from one end portion of the drain tube; cutting each end portion of the tube member protruding from each opening portion of the through hole along an oblique shape of each opening portion; and welding the cut end portion of the drain tube and the opening portion of the through hole.
A tube expansion method of mounting a tube member, by insertion and expansion, to a through hole in which opening portions at both ends are formed obliquely with respect to an axis center, the method comprising:
Dependencies are inferred from the claim text.