A SEMINAR REPORT ON 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.

FIG:-1.1 FRICTION WELDING MACHINE

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. Simplicity of operation.

2. Low power requirements.

3. Less time for welding.

4. Compare to flash and resistance butt welding friction welding produce

improved welds at higher speed and lower cost, less electrical current

is required.

5. Fully automated.

6. There is no flux, filler metal or slag presents.

7. With friction welding there is less shorting of the components.

DISADVANTAGES OF FRICTION WELDING:-

1. The use of this process is restricted to flat and angular butt welds, where one part is normal to the other part.

2. So far the process has been applied only to the joining of small pieces in the form of bar stock

3. Sometimes, quite a heavy flash is forced out in all inertia and friction welds.

4. If tubing is welded, flash may have to be removed from inside the joint.

5. Flash from medium and high carbon steels being hard, must either be removed while it is hot or annealed before it is machined.

6. Thrust pressures in inertia welding will range from 700 to 2800 kg/cm2, which require machine.

APPLICATION OF FRICTION WELDING:-

1. Friction welding is use for joining steels, super alloys, nonferrous metals and combination of metals.

2.  Among its varied applications are:Production of steering shafts and worm gears, control shafts, axle shafts, engine valves, transmission shafts etc., for automobile indus.

PRACTICAL APPLICATION:-

Engine valves Driveshaft

CONTINUOUS:-

Axles Turbochargers