US 11,654,508 B2
Method for producing liquid-cooled jacket
Hisashi Hori, Shizuoka (JP); Nobushiro Seo, Shizuoka (JP); and Kosuke Yamanaka, Shizuoka (JP)
Assigned to NIPPON LIGHT METAL COMPANY, LTD., Tokyo (JP)
Appl. No. 16/624,250
Filed by NIPPON LIGHT METAL COMPANY, LTD., Tokyo (JP)
PCT Filed Jul. 20, 2018, PCT No. PCT/JP2018/027337
§ 371(c)(1), (2) Date Dec. 18, 2019,
PCT Pub. No. WO2019/064848, PCT Pub. Date Apr. 4, 2019.
Claims priority of application No. JP2017-185941 (JP), filed on Sep. 27, 2017.
Prior Publication US 2021/0146473 A1, May 20, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B23K 20/00 (2006.01); B23K 20/12 (2006.01); B23K 20/24 (2006.01); B23K 101/14 (2006.01)
CPC B23K 20/1255 (2013.01) [B23K 20/129 (2013.01); B23K 20/1225 (2013.01); B23K 20/24 (2013.01); B23K 2101/14 (2018.08)] 10 Claims
OG exemplary drawing
 
1. A method for manufacturing a liquid-cooled jacket configured with: a jacket body having a bottom portion, a peripheral wall portion rising from a peripheral edge of the bottom portion and a support column rising from the bottom portion; and a sealing body sealing an opening of the jacket body, wherein the jacket body and the sealing body are joined by friction stirring,
the method comprising:
a preparation step of forming a peripheral wall step portion having a step bottom surface and a step side surface rising from the step bottom surface on an inner peripheral edge of the peripheral wall portion, and a support column end surface of the support column at the same height position as the step bottom surface of the peripheral wall step portion;
a placing step of placing the sealing body on the jacket body;
a first main joining step of performing a friction stirring by moving a rotary tool around along a first abutted portion where the step side surface of the peripheral wall step portion is abutted against the outer peripheral side surface of the sealing body each other; and
a second main joining step of performing a friction stirring, by moving the rotary tool, to an overlapping portion where the support column end surface of the support column and a back surface of the sealing body are overlapped,
wherein
the rotary tool is a main joining rotary tool for friction stirring having a base-end-side pin and a tip-end-side pin,
a taper angle of the base-end-side pin is 135 to 160 degrees and greater than a taper angle of the tip-end-side pin, and a pin step portion is formed in an outer circumferential surface of the base-end-side pin,
wherein a spiral groove is formed on an outer circumferential surface of the tip-end-side pin, the spiral groove being formed of a spiral bottom surface and a spiral side surface,
wherein an angle defined by the spiral bottom surface and the spiral side surface is 45 to 90 degrees, and
wherein the spiral bottom surface of the spiral groove adjoins the spiral side surface of the spiral groove at an outer side of the tip-end-side pin, and the spiral side surface of the spiral groove adjoins the spiral bottom surface of the spiral groove at an inner side of the tip-end-side pin, and
friction stirring is performed in the first main joining step under the condition that the tip-end-side pin and the base-end-side pin come in contact with the jacket body and the sealing body, while the friction stirring is performed in the second main joining step under the condition that the tip-end-side pin comes in contact with either both the jacket body and the sealing body or only the sealing body and the base-end-side pin comes in contact with the sealing body.