Title:
ROTATING TOOL FOR FORMING VOIDS AND VOID-FORMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2012/008307
Kind Code:
A1
Abstract:
Disclosed are a rotating tool for forming voids and a void-formation method whereby, when friction stirring is used to form a void inside a metallic member, said void is more resistant to collapse and the formation of surface defects is inhibited. Said rotating tool (1), which is moved relative to a metallic member (Z) while being rotated and forms a void (M) inside said metallic member (Z), is characterized by having a shoulder part (2) and a stirring pin (3) that is suspended vertically from said shoulder part (2). The rotating tool is further characterized in that a helical groove (3a) is engraved in the outer surface of the stirring pin (3) and the outside diameter of the shoulder part is 1.4-2.2 times the outside diameter of the tip of the stirring pin.
Inventors:
HORI Hisashi (NIPPON LIGHT METAL COMPANY LTD., 1-34-1, Kambara, Shimizu-ku, Shizuoka-sh, Shizuoka 91, 〒4213291, JP)
堀 久司 (〒91 静岡県静岡市清水区蒲原１丁目３４番１号 日本軽金属株式会社 グループ技術センター内 Shizuoka, 〒4213291, JP)
堀 久司 (〒91 静岡県静岡市清水区蒲原１丁目３４番１号 日本軽金属株式会社 グループ技術センター内 Shizuoka, 〒4213291, JP)
Application Number:
JP2011/064934
Publication Date:
January 19, 2012
Filing Date:
June 29, 2011
Export Citation:
Assignee:
NIPPON LIGHT METAL COMPANY, LTD. (2-20, Higashi-shinagawa 2-chome Shinagawa-k, Tokyo 28, 〒1408628, JP)
日本軽金属株式会社 (〒28 東京都品川区東品川２丁目２番２０号 Tokyo, 〒1408628, JP)
HORI Hisashi (NIPPON LIGHT METAL COMPANY LTD., 1-34-1, Kambara, Shimizu-ku, Shizuoka-sh, Shizuoka 91, 〒4213291, JP)
日本軽金属株式会社 (〒28 東京都品川区東品川２丁目２番２０号 Tokyo, 〒1408628, JP)
HORI Hisashi (NIPPON LIGHT METAL COMPANY LTD., 1-34-1, Kambara, Shimizu-ku, Shizuoka-sh, Shizuoka 91, 〒4213291, JP)
International Classes:
B23K20/12
Attorney, Agent or Firm:
ISONO Michizo (Sabo Kaikan Annex 7-4, Hirakawa-cho 2-chome, Chiyoda-k, Tokyo 93, 〒1020093, JP)
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Claims: