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A S E M I N A R R E P O R T O N FRICTION WELDING
PRESENTED BY:-
DEFINATION
Friction welding is a solid state welding
process where in coalescence is produced by the heat obtained from mechanically induced sliding motion between rubbing surfaces. The work parts are held together under pressure.
OPERATION STEP FOR FRICTION WELDING:-
STEP:-1
The two components to be friction welded are held in axial alignment.
STEP 2:-
One component that is held in chucking spindle of the machine is rotated and accelerated to the desired speed.
STEP 3:-
The other component that is held in the movable clamp is moved forward to come into pressure contact with the rotating component.
STEP 4:-
Pressure and rotation are maintained until the resulting high temp
makes the component’s metal plastic for welding with sufficient metal behind the interface becoming softened to permit the components to be forged together. During this period metal is slowly extruded from the weld region to form an upset
ADVANTAGES OF FRICTION WELDING:- 1. Simp Simpli lici city ty of ope opera rati tion on.. 2. Low Low pow power er requ requir irem emen ents ts.. 3. Less Less time time for for weld weldin ing. g. 4. Compare Compare to to flash and and resistanc resistance e butt weldin welding g friction friction welding welding produ produce ce improved welds at higher speed and lower cost, less electrical current is required. 5. Full Fully y auto automa mate ted. d. 6. There There is no flux, flux, filler filler metal metal or slag slag prese presents. nts. 7. With frict friction ion weldin welding g there there is less less shorti shorting ng of the the compone components. nts.
D I S A D VA V A N TA TA G E S O F FRICTION WELDING:- 1. The use use of this this process process is restric restricted ted to flat flat and angular angular butt butt welds, welds, where one part is normal to the other part. 2. So far the the process process has has been been applied applied only only to the joinin joining g of small small pieces pieces in the form of bar stock 3. Sometime Sometimes, s, quite quite a heavy flash flash is forced forced out out in all inerti inertia a and frictio friction n welds. 4. If tubing tubing is welded welded,, flash flash may may have have to be remove removed d from from inside inside the joint. 5. Flash Flash from medium medium and high high carbon carbon steels steels being being hard, hard, must must either either be be removed while it is hot or annealed before it is machined. 6.
Thrust Thrust pressure pressures s in inertia welding welding will will range range from 700 to 2800 kg/cm2, which require machine.
APPLI CA AT TION OF FRICTION WELDING:- 1. Friction Friction welding welding is use for joining joining steels, steels, super alloys, nonferrous metals and combination of metals. 2. Among its varied varied applicatio applications ns are: are: Production of steering shafts and worm gears, control shafts, axle shafts, engine valves, transmission shafts etc., for automobile indus.
