BACK-SHIELDED WELDING METHOD AND WELDED STRUCTURE USING SAME

Title:

BACK-SHIELDED WELDING METHOD AND WELDED STRUCTURE USING SAME

Document Type and Number:

WIPO Patent Application WO/2013/084777

Kind Code:

A1

Abstract:

This back-shielded welding method: forms notches (21, 22) in the abutting edges (15, 16) of two weld metal surfaces (2, 3) that are to be brought into contact so as to form, between the two weld metal surfaces (2, 3), a slit-shaped gas supply opening (17), which allows the front side and the back side of the weld metal surfaces (2, 3) to communicate and which extends in the direction that the weld bead is to be formed; then forms the gas supply opening (17) using the notches (21, 22) by abutting and temporarily fixing the abutting edges (15, 16) of the weld metal surfaces (2, 3) to each other; then forms the weld bead while supplying an inert gas from the gas supply opening (17); and closes the gas supply opening (17) using the weld bead.

Inventors:

KAWASAKI KENJI (JP)
YAMAMOTO RYUICHI (JP)
NISHIMOTO SHIN (JP)
KAWAGUCHI SEIICHI (JP)

Application Number:

PCT/JP2012/080820

Publication Date:

June 13, 2013

Filing Date:

November 29, 2012

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)

International Classes:

B23K9/035; B23K9/00; B23K9/16; B23K33/00; F01D5/06; F01D25/00

Foreign References:

JP2011177790A	2011-09-15
JPH06262350A	1994-09-20
JP2002144038A	2002-05-21
JP2010031812A	2010-02-12
JP3999402B2	2007-10-31
JP2010031812A	2010-02-12
JP2008137042A	2008-06-19

Other References: