Aluminum Cooling Plate / Cold Plate Manufacturing | Process Reduction through Friction Stir Welding (FSW)

アルミ冷却プレート/コールドプレート製造 | 摩擦攪拌接合（FSW）による工程削減
In the field of electrical and electronic equipment, where higher power output and higher density are advancing, highly efficient and stable cooling technology is required due to the increase in heat generation. In recent years, the adoption of water cooling (liquid cooling) methods has been rapidly increasing, replacing conventional air cooling, and the demand for aluminum cold plates with integrated cooling channels is expanding. However, when mass production is assumed, the airtightness, strength, and quality stability of the channel section become significant challenges.
Ohno Seikou Vietnam provides channel sealing technology for aluminum cooling plates using Friction Stir Welding (FSW), achieving process reduction, quality stability, and cost optimization.
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Features of Cooling Channel Joining by FSW
The general structure of an aluminum cooling plate involves machining channels into an aluminum base material and then covering it with an aluminum plate for sealing. Compared to conventional lateral hole machining + plug welding, or TIG/MIG welding, a major feature of FSW is its ability to continuously join the entire channel in a single process.
・Excellent watertightness, ideal for cooling plates requiring pressure resistance
・Reduces the risk of deformation and cracking because the base material is not melted
・Ensures flatness after joining, supporting the mounting of power modules
・Easy to standardize processes, a manufacturing method suitable for mass production
As a result, FSW is ideal for high-power applications such as aluminum heat sinks, water-cooled cold plates, cooling components for inverters, motor drivers, IGBT/SiC modules, and battery-related components.
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Strengths of Ohno Seikou Vietnam's FSW Technology
・Reduces the number of joining processes in cold plate manufacturing
・Supports dissimilar material joining (aluminum and aluminum alloys)
・Real-time monitoring of quality during joining
・Visualizes joint temperature and quantifies quality evaluation
・Simultaneous monitoring of tool temperature, workpiece surface temperature, and spindle load
・With MULTI INTELLIGENCE, simultaneous 3-point measurement is performed, enabling the selection of optimal joining conditions.
For more details, please download the PDF document or feel free to contact Ohno Seikou. We will propose the optimal FSW solution for your products and applications.