Transcript Slide 1

FRICTION WELDING
By,
AVINASH VERMA(2008AMD2930)
INTRODUCTION
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It is solid state joining
process.
Mechanical friction
between a moving
workpiece and a
stationary component.
Lateral force (upset)
is applied to
plastically displace
and fuse the materials
Types of Friction Welding
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Spin Welding:
A rotating chuck
along with flywheel.
After reaching to
required speed motor
is removed form
flywheel.
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Linear Friction
Welding:
Oscillating Chuck is
used.
Use for non-round
shapes as compare to
Spin welding.
Material should be of
high shear strength.
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Friction Surfacing:
It is a surface coating
process.
Coating material
Mechtrode is rotated
under pressure over
substrate.
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Friction Stir Welding:
A cylindrical
shouldered tool, with
a profiled probe (nib
or pin) is used.
Friction is between
tool shoulder, nib and
workmetal.
Direct drive friction welding
process:
Inertia welding process:
Advantages of Friction
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Simplicity of operation and simple equipment.
Less time requirement.
Low Surface impurities and oxide films.
Compare to resistance butt welding produces improved
welds at higher speed and lower cost, less electric
current is required.
Heat affected zone is small as compare to conventional
flash welding.
Less shortening of the component, as compared to that
in flash or butt welding.
There is no flux, gas, filler metal or slag present to cause
imperfections in welds.
Disadvantages of Friction
Process is restricted to flat and angular
butt welds.
 Use only for joining small parts.
 In case of tube welding process becomes
complicated.
 In case of high carbon steels it is difficult
to remove flash.
 It require heavy rigid machine due to high
Thrust pressure.
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Materials used in Friction welding
process:
Variety of metals can be joined by this process as well as
it gives variety of metals combination which cannot join
by conventional process.
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Aluminum
Brass
Cast iron
Ceramic
Copper
Lead
Bronze
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Aluminum Alloys
Steel Alloys
Magnesium
Magnesium Alloys
Tungsten
Vanadium
Weldable Material Combinations:
Applications:
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Automobile: Bimetallic engine valve, universal
joint yoke, gear hub etc.
Aerospace: Turbine blade joining, seamless
joining etc.
Consumer: Hand tools, sports equipment
Industrial: Spindles, tapers, tools
Military
Medical: Stainless steel joining of containers
Marine: Shipping Industry
Mining/Drilling: Twist drill etc.
Hydraulic equipments
Applications:
Thank you