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Patent Searching and Data


Title:
METALLIC TUBULAR BODY AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2014117731
Kind Code:
A
Abstract:

To provide a metallic tubular body having great durability against deformation both in the axial direction and in the circumferential direction, and to provide a manufacturing method thereof.

The rolling direction of an outlined arrow 2 is allowed to be the circumferential direction of a metallic tubular body 4 so that a metal plate is rounded cylindrically. A butting part 41 of the metallic tubular body 4 is subjected to plasma welding (microplasma welding), thereby to integrate the metallic tubular body 4. Rollers 52, 52 are pressed onto the outer peripheral surface 43 of the metallic tubular body 4, and the rollers 52, 52 are moved in the axial direction of the metallic tubular body 4, thereby to perform spinning. The metallic tubular body 4 is narrowed by being plastically deformed in the axial direction of the metallic tubular body 4, and lengthened in the axial direction.


Inventors:
FUJITANI SHIGERU
HOSHINO KAZUHIRO
Application Number:
JP2012274789A
Publication Date:
June 30, 2014
Filing Date:
December 17, 2012
Export Citation:
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Assignee:
ENDO SEISAKUSHO KK
International Classes:
B21C37/08; B21B1/40; B21D51/10; B21H1/18
Attorney, Agent or Firm:
Motonari Tomisaki
Sadao Enjoji
Machida Mitsunobu