LIQUID COOLING JACKET MANUFACTURING METHOD

WIPO Patent Application WO/2019/038938

A1

The present invention includes: a preparation step in which a level difference section (12) having a level difference bottom surface (12a) and a level difference side surface (12b) that rises up perpendicularly from the level difference bottom surface (12a) toward an opening section is formed at an inner peripheral edge of a peripheral wall section (11); a mounting step in which a sealing body (3) is mounted to a jacket main body (2), and a first butt section (J1) and a second butt section (J2) are formed; and a main welding step in which friction stir welding is performed by causing a rotating tool (F) that rotates to travel one round along the first butt section (J1), under conditions in which only a stirring pin (F2) of the rotating tool (F) is in contact with only the sealing body (3), wherein during the main welding step, a rotational center axis (C) of the rotating tool (F) is tilted to a center section side of the jacket main body (2), and friction stir welding is performed under conditions in which (γ=α), where (γ) is the angle of tilt of the rotational center axis (C) of the rotating tool (F) with regard to the level difference side surface (12b), and (α) is the angle of tilt of an outer peripheral surface of the stirring pin (F2) with regard to the rotational center axis (C).

HORI HISASHI (JP)
SEO NOBUSHIRO (JP)

PCT/JP2017/041706

February 28, 2019

November 20, 2017

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NIPPON LIGHT METAL CO (JP)

B23K20/12

WO2016132768A1	2016-08-25
WO2017138324A1	2017-08-17

JP2010279958A	2010-12-16
JP2010036230A	2010-02-18
JP2003039183A	2003-02-12
JP2003225779A	2003-08-12
JP2010245085A	2010-10-28

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

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