Xuyuan Precision
Friction Stir Welded Heat Sink
Application
Electronic devices, automotive industry, computers and servers, medical equipment.
Product Feature
Compared to conventional fusion welding, friction welding offers superior joint quality—achieving weld strength equivalent to that of the base material—along with high welding efficiency, excellent consistency, stable quality, and the ability to join dissimilar materials. Friction welding enables the assembly of two or more standard extruded profiles into an ultra-wide, high-density structure, significantly reducing tooling development costs, shortening lead times, and ensuring high structural stability.
Processing
To create cooling channels in a heatsink or cold plate, cooling passages can first be machined into the base plate using CNC machining. A cover plate of closely matched dimensions is then pressed onto the base plate and joined using friction stir welding (FSW), which fully fuses the seam between the cover and base plates, resulting in internal channels of various shapes that are typically open but highly reliable in terms of sealing.
A typical FSW-based cold plate manufacturing process involves three main steps:
Machining: Using CNC machining to fabricate both the base plate and cover plate according to the final structural dimensions and welding requirements.
Friction Stir Welding: Mounting the parts onto an FSW machine, performing tack welding for initial alignment, and then executing full-length friction stir welding along the joint seam to complete the weld.
Inspection and Finishing: Conducting tests to verify weld strength and leak-tightness; once passed, performing a final CNC surfacing operation (e.g., fly-cutting) on the welded surface to achieve the required finish.
Processing Equipment
Engraving Machines, CNC Lathes, High-speed Engraving and Milling Machines, Drilling and Tapping Machines, 3-axis/4-axis/5-axis CNC Machining Centers, Swiss-type Lathes, Turn-Mill Centers
Quality Control & Inspection
1. Material Quality Inspection
2. Dimensional (or Precision) Quality Inspection
3. Appearance Quality Inspection
4. Functional Quality Inspection
5. Structural Quality Inspection
6. Surface Treatment Quality Inspection
7. Packaging Quality Inspection
