Method of manufacturing a cooling device

Abstract

To provide a manufacturing method for a cooling device that can contribute to simplifying manufacturing of the cooling device.SOLUTION: A manufacturing method for a cooling device (1) according to one embodiment described in the disclosure comprises: a step in which two aluminum plate materials on which a first recessed part and a second recessed part that is smaller in depth than the first recessed part are formed are arranged to oppose to each other, a bottom part of the first recessed part and a bottom part of the second recessed part are butted to each other and the bottom part of the first recessed part and the bottom part of the second recessed part are laser-welded from the either aluminum plate material of the two aluminum plate materials; and a step in which heat is inputted to the first recessed part or the second recessed part from the either aluminum plate material in order to correct warpage of the laser-welded two aluminum plate materials.SELECTED DRAWING: Figure 5

Claims

1. A method for manufacturing a cooling device having a refrigerant flow path, which involves laser welding together the bottoms of uniaxially extending recesses in two aluminum plates, The process involves arranging two aluminum plates, each having a first recess and a second recess shallower than the first recess, so that they face each other, butting the bottoms of the first recess and the second recess together, and laser welding the bottoms of the first and second recesses from one side of the two aluminum plates, In order to correct the warping of the two laser-welded aluminum plates, a step is to apply heat to the first recess or the second recess from the side of one of the aluminum plates, A method for manufacturing a cooling device, comprising the above.

2. A method for manufacturing a cooling device according to claim 1, wherein the first recess and the second recess are arranged to be adjacent to each other alternately.

3. A method for manufacturing a cooling device according to claim 1 or 2, wherein if the two aluminum plates warp convexly toward one of the aluminum plates after laser welding, heat is supplied to the second recess, and if the two aluminum plates warp convexly toward the other aluminum plate after laser welding, heat is supplied to the first recess.

4. The method for manufacturing a cooling device according to claim 1 or 2, wherein the thickness of the other aluminum plate in the two aluminum plates is equal to or greater than the thickness of the first aluminum plate.

5. A method for manufacturing a cooling device according to claim 1 or 2, wherein heat is supplied to the portion of the two aluminum plates that has a small impact on the heat input to the bottom of the first recess in the first recess or the bottom of the second recess in the second recess.

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