zahid bashir soomro friction welding 08 me138
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SolidState
Welding
Electrical
Chemical
Mechanical
FrictionPressure &
DeformationFriction
Weld
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By this coalescence is achieved by frictional heat combined with pressure
When properly carried out, no melting occurs at faying surfaces
No filler metal, flux, or shielding gases normally used
Process yields a narrow HAZ Can be used to join dissimilar metals Widely used commercial process,
amenable to automation and mass production
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Parts are joined by a linear reciprocating motion
Parts do not have to be circular or tubular
In this application, one part is moved across the face of the other part using a balanced reciprocating mechanism
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AWS Welding Handbook
Linear Reciprocating Friction Welding
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Figure 31.28 Friction welding (FRW): (1) rotating part, no contact; (2) parts brought into contact to generate friction heat; (3) rotation stopped and axial pressure applied; and (4) weld created.
Friction Welding
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Applications: Shafts and tubular parts Industries: automotive, aircraft, farm
equipment, petroleum and natural gas Limitations: At least one of the parts must be
rotational Flash must usually be removed Upsetting reduces the part lengths
(which must be taken into consideration in product design)
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Friction Welded Automotive Halfshaft Friction Welded Joint
Applications
Courtesy AWS handbook
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Aluminum to Steel Friction Weld
Dissimilar Metals – Friction Welded
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