METHOD OF MANUFACTURING LIQUID-COOLED JACKET

摘要

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.

主权项

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.