STIR FRICTION WELDING machine
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FSW is a solid-state joining process that creates high-quality, high-strength joints with low distortion and is capable of fabricating either butt or lap joints, in a wide range of material thicknesses and lengths. In the process a rotating FSW tool is plunged between two clamped plates. The frictional heat causes a plasticized zone to form around the tool. The rotating tool moves along the joint line. A consolidated solid-phase joint is formed. FSW being a solid-state process eliminates many of the defects associated with fusion welding techniques such as shrinkage, solidification cracking and porosity.