Title:
TUBE EXPANSION PLUG
Document Type and Number:
WIPO Patent Application WO/2014/010387
Kind Code:
A1
Abstract:
This tube expansion plug (1) is used in causing the expansion of an aluminum tube (2) to the inner surface (21) of which a lubricating oil has been provided. A linear groove (12) is formed at the surface of the tube expansion plug (1) at the region that contacts the aluminum tube. The groove (12) is formed at a predetermined angle with respect to the direction (X) of progression of the tube expansion plug (1). The width (Wμm) and depth (Dμm) of the groove (12) in the direction (X) of progression satisfy the relationships 10 ≤ W ≤ 100, 1 ≤ D ≤ 100, and W/D ≥ 1. The lateral surfaces (126, 127) of the groove (12) have: an anterior-side convex surface (124) that neighbors the anterior-side end (121); and a posterior-side convex surface (125) that neighbors the posterior-side end (122).
Inventors:
UEDA KAORU (JP)
TOTANI YUKI (JP)
TOTANI YUKI (JP)
Application Number:
PCT/JP2013/067064
Publication Date:
January 16, 2014
Filing Date:
June 21, 2013
Export Citation:
Assignee:
SUMITOMO LIGHT METAL IND (JP)
International Classes:
B21D39/20; B21D37/18; B21D53/08
Foreign References:
| JP2000117362A | 2000-04-25 | |||
| JPS5768230A | 1982-04-26 | |||
| JP2007105762A | 2007-04-26 | |||
| JPH02182330A | 1990-07-17 | |||
| JPH10263713A | 1998-10-06 | |||
| JPS6056413A | 1985-04-02 |
Attorney, Agent or Firm:
AICHI, Takahashi, Iwakura & Associates (JP)
Patent business corporation あいち international patent firm (JP)
Patent business corporation あいち international patent firm (JP)
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