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FSW Heat Sink
- Heat sinks will be joined together using Friction Stir Welding (FSW).
- Maximum final size for a FSW heat sink is 400x190 (mm).
- Standard lead time is 1-2weeks. No MOQ.
- Additional modifications including holes, notches, and pedestals are possible.
If a FSW heat sink larger than the maximum size or using a different fin pattern is required, please contact our sales.
Friction Stir Welding is a method of joining materials by heating the surrounding material to a high temperature through friction with a rotating tool. This causes the material to soften and flow, joining the materials. Compared to other joining methods, it has the advantage of high energy efficiency and a stable joint quality.
At right is a photo of a cross-section, cut perpendicular to the weld line/joint. There are no visible voids or cavities.
FSW heat sinks will have a conical hole remaining along the edge (right photo). This feature is a FSW process requirement and should not be significant thermally or mechanically.
The following are results of a performance test, comparing a standard 100x100x30mm heat sink (UB100-30B) with a heat sink created by joining two smaller units by FSW to the same size. Thermal performance is virtually identical.
| Sample name | m/sec | 0.5 | 0.8 | 1 | 1.2 | 1.5 | 2 | 2.5 | 3 | 4 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| UB100-30B | (℃/W) | 0.586 | 0.430 | 0.373 | 0.340 | 0.306 | 0.275 | 0.257 | 0.245 | 0.227 | |
| UB100-30 FSW JOINT | 0.588 | 0.431 | 0.375 | 0.342 | 0.308 | 0.276 | 0.258 | 0.246 | 0.228 |
The model name and maximum size of FSW heat sink vary depending on the base heat sink. Prices also differ based on the specified model series, size, number of joints, and order quantity. For more details, please refer to the detailed pages for each series below. Please note that we can accommodate custom requests even if the dimensions exceed the standard maximum size or if a side measures less than 40 mm. Please contact us for details.
| Detailed Pages for Each FSW Series Model |
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| Heat Sink Jointing Patterns Maximum width: Wmax, length: Lmax vary by series. Up to five heat sinks may be connected in a single row, subject to the specific requirements. |
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| 40mm ≤ W ≤ Wmax | ||
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| 40mm ≤ L ≤ Lmax |
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