Friction stir spot welding adopts a specially designed welding tool, which is composed of a stir pin, a stir sleeve, and a clamping sleeve. Through multiple extrusion and forging processes of welding tools, a keyhole-free FSSW is achieved.

The Advantages of FSSW Technology

Compared to Resistance Spot Welding

• Economically achieving spot connections of 3 mm or more

• Connecting dissimilar materials

• Connecting multi-layer foils

• Good appearance of welding spots with stable internal quality

• Achieving shear strength increased by more than 30%

• Less equipment investment with a reduction in energy consumption by over 90%

• Easy inspection of welding spot quality

Compared to Riveting

• Higher fatigue strength

• No increase in weight

• Aesthetically pleasing appearance of welding spots

• Very low noise levels

• Elimination of the need for additional rivets, resulting in cost reduction

Features

• The welding spot surface is smooth and aesthetically pleasing

• The load-bearing area of the weld nugget is larger

• The bonding strength is higher

• The process is relatively simple