Method of manufacturing liquid-cooled jacket

Patent metadata

Field	Value
Publication number	US-2018264584-A1
Application number	US-201815982754-A
Country	US
Kind code	A1
Filing date	May 17, 2018
Priority date	Jan 14, 2014
Publication date	Sep 20, 2018
Grant date	—

Abstract

A method of manufacturing a liquid-cooled jacket, includes a preparation step which includes placing a sealing body on a stepped portion to allow a step side surface and a sealing-body side surface of the sealing body to butt each other, and a primary joining step which includes allowing a primary joining rotary tool to move once around the sealing body, while moving the rotary tool along a butted portion formed in the preparation step, to carry out friction stir welding. The primary joining step includes employing the primary joining rotary tool provided with a stirring pin having a length dimension greater than a thickness dimension of the sealing body, and carrying out friction stirring with only the stirring pin being brought into contact with a jacket body and the sealing body.

First claim

1 . A method of manufacturing a liquid-cooled jacket which is composed of a jacket body having a bottom portion and a frame-shaped side wall portion provided to stand on the bottom portion, and a sealing body which seals an opening of the jacket body, and allows heat transport fluid to flow in a hollow portion formed by the jacket body and the sealing body, the method comprising:
a preparation step which includes forming, on a peripheral edge of the opening of the jacket body, a step bottom surface located below by one step from an end surface of the side wall portion, and a step side surface rising from the step bottom surface, and placing the sealing body on the step bottom surface to allow the step side surface and a sealing-body side surface of the sealing body to butt each other; and a primary joining step which includes allowing a rotary tool to move once around the sealing body, while moving the rotary tool along a butted portion formed in the preparation step, to carry out friction stir welding, wherein the primary joining step includes employing the rotary tool provided with a stirring pin having a length dimension greater than a thickness dimension of the sealing body, and carrying out friction stirring with only the stirring pin being brought into contact with the jacket body and the sealing body.

2 . The method of manufacturing the liquid-cooled jacket according to claim 1 , wherein the liquid-cooled jacket includes a supporting portion formed on any one, and abutting on the other, of the bottom portion of the jacket body and a back surface of the sealing body.

3 . The method of manufacturing the liquid-cooled jacket according to claim 1 , wherein
the jacket body includes a supporting portion which stands on the bottom portion and abuts on a back surface of the sealing body, and the primary joining step includes carrying out friction stir welding for an overlapped portion at which the back surface of the sealing body and an end surface of the supporting portion are overlapped each other, in addition to friction stir welding for the butted portion.

4 . The method of manufacturing the liquid-cooled jacket according to claim 3 , wherein
the supporting portion is formed to continue from the side wall portion, and the primary joining step includes continuously carrying out the friction stir welding for the butted portion and the overlapped portion.

5 . The method of manufacturing the liquid-cooled jacket according to claim 3 , wherein
the supporting portion is formed to continue from one wall portion constituting the side wall portion and to be kept away from another wall portion facing the one wall portion, and the primary joining step includes: inserting the rotary tool into a position corresponding to the supporting portion, on a front surface of the sealing body; continuously carrying out the friction stir welding for the overlapped portion and the butted portion; and pulling out the rotary tool from an end surface of the side wall portion outside the butted portion.

6 . The method of manufacturing the liquid-cooled jacket according to claim 1 , wherein
the primary joining step includes providing a cooling plate on the bottom portion of the jacket body, and carrying out friction stir welding while cooling the jacket body and the sealing body.

7 . The method of manufacturing the liquid-cooled jacket according to claim 6 , wherein
the primary joining step includes allowing a back surface of the bottom portion of the jacket body and the cooling plate to be brought into surface contact with each other.

8 . The method of manufacturing the liquid-cooled jacket according to claim 1 , further comprising:
prior to the primary joining step, a provisional joining step of carrying out provisional joining for the butted portion.

Assignees

• Nippon Light Metal Co

Inventors

• Hori Hisashi
• Seo Nobushiro

Classifications

• B23K20/1235 Primary

  with temperature control during joining · CPC title

• B23K20/124 Primary

  at the beginning or at the end of a weld · CPC title

• B23K20/126

  Workpiece support, i.e. backing or clamping · CPC title

• B23K2201/045

  Operations & Transport · mapped topic

• B23K20/1255

  Tools therefor, e.g. characterised by the shape of the probe · CPC title