Laser welding method and cooler

JP7877785B2Active Publication Date: 2026-06-23RESONAC CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
RESONAC CORP
Filing Date
2022-04-08
Publication Date
2026-06-23

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Abstract

To improve cooling efficiency by fins with a simple method.SOLUTION: In a laser welding method, a fin member (for example, a heat sink 10) having a flat base 11 and a plurality of flat fins 12' that protrude from the surface of the base 11 and are lined up with gaps 113 extending in the first direction on the surface is overlapped on a flat holding member (for example, a cover 22), and while joining the fin member and the holding member, at least a portion of the plurality of fins 12' is deformed into a wave shape by irradiating the gap on the base 11 with the laser beam L at multiple locations in the first direction.SELECTED DRAWING: Figure 9
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Claims

1. A fin member having a flat base and a plurality of flat fins protruding from the surface of the base and arranged with gaps extending in a first direction on the surface is superimposed on a flat holding member. By irradiating the gap in the base with laser light divided into multiple locations in the first direction, the fin member and the holding member are joined together, and at least a portion of the multiple fins are deformed into a wave shape. Laser welding method.

2. The fin member has a plurality of gaps arranged on either side of the fin in a second direction intersecting the first direction, and laser light is irradiated onto the same position in the first direction to adjacent gaps in the second direction. The laser welding method according to claim 1.

3. The fin member has a plurality of gaps arranged on either side of the fin in a second direction intersecting the first direction, and laser light is irradiated onto the gaps adjacent to each other in the second direction at a position shifted in the first direction. The laser welding method according to claim 1.

4. Laser light is shone onto the gap to a plurality of first locations that are spaced apart in the first direction and a plurality of second locations that are adjacent to the first locations in the first direction and shifted in a second direction that intersects the first direction. The laser welding method according to claim 1.

5. A laser welding method according to any one of claims 1 to 4, wherein the fin is deformed into a wave shape by tilting the fin toward the part irradiated with the laser light in the gap.

6. A fin member having a flat base and a plurality of fins protruding from the surface of the base and arranged with a gap extending in a first direction on the surface, The system comprises a flat plate-shaped retaining member that holds the fin member, The fin member is joined to the holding member by being irradiated with laser light at multiple locations in the first direction relative to the gap in the base, and at least a portion of the multiple fins is deformed into a wave shape. cooler.