METHOD FOR MANUFACTURING HEAT EXCHANGER

WIPO Patent Application WO/2021/171637

A1

The present invention is characterized by including a main joining step in which a single pass around the outer circumferential surface (11f) of an extruded porous tube (2) is completed at a prescribed depth along a set movement route (L1) that is set closer to the extruded porous tube (2) than to an abutting part (J1), while causing a second aluminum alloy to flow into a gap, to perform friction stir welding of the abutting part (J1), in a state in which a stirring pin (F2) of a rotating tool (F) is inserted into the outer circumferential surface (11f) of the extruded porous tube (2) and the outer circumferential surface of the stirring pin (F2) is lightly brought into contact with a stepped inclined surface (23b) of a lid (3) while the bottom surface (F1a) of a shoulder section (F1) is brought into contact with the outer circumferential surface (11f) of the extruded porous tube (2). The present invention is further characterized in that, in the main joining step, lids (3A, 3B) are held by being pressed by a pair of holding parts (32) from the outside on both sides while using the holding parts (32) to rotate or move the extruded porous tube (2) and the lids (3) in parallel and performing friction stir welding of the extruded porous tube (2) and the lids (3).

HORI HISASHI (JP)
SEO NOBUSHIRO (JP)

PCT/JP2020/018569

September 02, 2021

May 07, 2020

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NIPPON LIGHT METAL CO (JP)

B23K20/12; F28F1/02; F28F21/08

WO2013114474A1

2013-08-08

JPH0566073A	1993-03-19
JP2014046353A	2014-03-17
JP2010279958A	2010-12-16
JP2020011271A	2020-01-23
JP2019181473A	2019-10-24
JP2019141886A	2019-08-29
JP2018008294A	2018-01-18
JP2006150387A	2006-06-15
JP2005329463A	2005-12-02

ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)

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