Patent Number: 6,332,346

Title: Metal vessel and a fabrication method for the same

Abstract: In the present invention, in a method of fabricating a metal vessel formed by expanding in hydraulic bulge formation a cylinder having a bottom, wherein a flat plate material is formed into a cylinder, the edges welded, and a bottom member welded to one open part of the cylindrical shell member, the stationary point of the expanded part of the shell member is made the expanding part side from the shell member--bottom member weld of the cylinder with a bottom, and thereby by expanding the shell part on the opening side, a metal vessel is formed, and thus the time of the processing itself of a plurality of expanding process of press-working and ironing and transiting of moving from one step to the next can be completed by one step, decreasing the time and reducing the cost.

Inventors: Komiya; Yasuhiko (Tokyo, JP), Toida; Shoji (Tokyo, JP)

Assignee: Nippon Sanso Corporation

International Classification: B21D 26/02 (20060101); B21D 26/00 (20060101); B21D 51/10 (20060101); B21D 51/00 (20060101); B21D 51/18 (20060101); B21D 51/16 (20060101); B21D 026/02 (); B21D 039/08 (); B65D 008/04 ()

Expiration Date: 12/25/2018