METHOD FOR MANUFACTURING ELECTROSEAMED METAL TUBE, AND ELECTROSEAMED METAL TUBE

Title:

METHOD FOR MANUFACTURING ELECTROSEAMED METAL TUBE, AND ELECTROSEAMED METAL TUBE

Document Type and Number:

WIPO Patent Application WO/2018/147389

Kind Code:

A1

Abstract:

This method for manufacturing an electroseamed metal tube is for manufacturing an electroseamed metal tube by abutting the side ends of a metal strip and then welding the side ends by high frequency heating. An inner-surface-side corner positioned on the inner surface side of the electroseamed metal tube is provided on the side end. The method includes a step for forming a slanted surface on the inner-surface-side corner before abutting the side ends of the metal strip. The side ends are abutted and welded such that the slanted surface remains on the excess metal of the metal tube after electric welding and such that the discharge metal is not welded with the excess metal.

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Inventors:

OMOSAKO KOUJI (JP)
AKIDUKI MAKOTO (JP)
IGAWA SHIGENOBU (JP)
MAKIHARA YASUMASA (JP)
TANAKA RYOTA (JP)

Application Number:

PCT/JP2018/004474

Publication Date:

August 16, 2018

Filing Date:

February 08, 2018

Export Citation:

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Assignee:

NISSHIN STEEL CO LTD (JP)
NISSHIN KOKAN CO LTD (JP)

International Classes:

B23K13/00; B21C37/08; B21C37/083

Foreign References:

JPH02160189A	1990-06-20
JP2013226585A	2013-11-07
JPH04180537A	1992-06-26
JPS52125031U	1977-09-22
JP2015147239A	2015-08-20
JPH0280180A	1990-03-20
JPH0857661A	1996-03-05
JP2008105075A	2008-05-08

Other References: