COFAN THERMAL

Friction Stir Welding

Cofan’s friction stir welding (FSW) is an innovative solid-state joining process primarily used for bonding metals, although it can be adapted for other materials. Unlike traditional welding methods that involve melting the materials, FSW creates a strong bond without reaching the melting point.
Here’s how it works:
In FSW, two workpieces are securely clamped together, and a rotating tool with a specially designed profile is inserted into the joint between them. The tool’s rotation generates frictional heat, softening the materials without melting them. As the tool traverses along the joint line, it mechanically stirs and mixes the softened material from both workpieces, forming a metallurgical bond as it progresses.
This process results in a solid-phase weld, producing a joint that is remarkably strong and free from defects typically associated with fusion welding, such as porosity and solidification cracks. Once the tool completes its traversal, the joint cools rapidly, solidifying the weld.
Cofan’s FSW offers several advantages over conventional welding techniques. It produces welds with excellent mechanical properties, including high strength and toughness. Additionally, FSW eliminates issues like distortion and residual stresses commonly encountered in fusion welding processes.
Moreover, FSW is environmentally friendly, emitting minimal fumes and requiring no consumable filler materials. It is also highly versatile and capable of joining a wide range of materials, including aluminum, steel, and titanium alloys.
FSW finds applications in various industries, including aerospace, automotive, shipbuilding, and rail transport, where strong and reliable joints are crucial. It is particularly well-suited for joining large and complex components, making it a preferred choice for manufacturing lightweight structures, such as aircraft fuselages and vehicle panels.

Steps of FSW work

Friction stir welding (FSW)

Work processes

Friction stir welding (FSW)

Samples

Friction stir welding (FSW)

Applicable materials

Friction stir welding (FSW)

Machines

Friction stir welding (FSW)
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