Title:
ハイドロフォーミングを用いたウォーターパイプ及びその製造方法
Document Type and Number:
Japanese Patent JP5584769
Kind Code:
B2
Abstract:
Disclosed are a double water pipe manufactured via hydroforming and a method of manufacturing the same. The method includes: inserting an inner pipe into an outer pipe made of steel, the inner pipe being made of a corrosion resistant material selected from among stainless steel, titanium and aluminum, and having a smaller outer diameter than an inner diameter of the outer pipe; placing the outer pipe on a die unit and sealing opposite ends of the die unit with sealing members each having a through-hole connected to a fluid supply unit for supplying a fluid to the inner pipe; supplying the fluid to the inner pipe to perform plastic expansion of the inner pipe and elastic expansion of the outer pipe; and discharging the fluid from the inner pipe to allow frictional coupling between the inner pipe and the outer pipe through elastic restoration of the outer pipe.
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| JPH10510036 | [Title of Invention] Pipe Assembly |
| JPH02180400 | DAMPING DOUBLE METAL TUBE |
Inventors:
Park ソンピル
Gin キョンス
Kim ユンキュ
ムン マンビン
Gin キョンス
Kim ユンキュ
ムン マンビン
Application Number:
JP2012535103A
Publication Date:
September 03, 2014
Filing Date:
April 08, 2010
Export Citation:
Assignee:
Hyundai ハイスコ
International Classes:
F16L9/04; B21C37/06; B21D26/033; B21D26/051; F16L57/00
Attorney, Agent or Firm:
Morioka Right 往
Okawa 宏
Okawa 宏