Method of making a fluid cooled assembly

摘要

A method of making a fluid cooled assembly that incorporates a base that forms a partial enclosure defining an interior void space and having a top wall that has a top surface and that defines at least one opening through the top wall to the void space, the base further defining fluid entrance and exit ports into the void space, the top wall being made of material that can be friction stir welded. A lid having a size and shape substantially conformal to the opening, having a top surface and a bottom surface that defines a set of downwardly extending pins, and that is formed of a material that can be friction stir welded to the base is placed into the opening so that the lid top surface is flush with the top surface of the base top wall and friction welding the lid to the base.

主权项

1. A method of making a fluid cooled assembly, comprising:
(a) providing a base that forms a partial enclosure defining an interior void space and having a top wall that has a top surface and that defines at least one opening through said top wall to said void space, said base further defining fluid entrance and exit ports into said void space, said top wall being made of material that can be friction stir welded; (b) providing a lid having a size and shape substantially conformal to said opening, having a top surface that is, inward from the margins, made of a first material that has a coefficient of thermal expansion between 10 and 17 ppm/° C. and which, at the margins, is formed of a second material that can be friction stir welded to said base, wherein the first material cannot be friction stir welded and is not exposed to said friction stir welding and said second material encompasses the entire area to be friction welded, and wherein the margins are defined as encompassing the circumferential edge of the top surface of the lid to an area spaced therefrom; and (c) placing said lid into said opening so that said lid top surface is flush with said top surface of said base top wall and friction welding said lid to said base.