TECHNICAL SEMINAR ON Friction Welding - Sourav Mondal

8/10/2019 TECHNICAL SEMINAR ON Friction Welding - Sourav Mondal

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A Technical Seminar

On

FRICTION WELDING

PRESENTED BY,SOURAV MONDAL

M.E-D-09/13

ROLL NO -11800713074

BIRBHUM INSTITUTE OF ENGINEERING

& TECHNOLOGY


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Contents

1. Introduction

2. Principle

3. Types of Friction Welding

4. Advantages

5. Disadvantages

6. Application

7. References


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Friction welding is a group of solid state joiningprocess using heat generated through mechanical

friction between moving workpieces,with the

addition of an upsetting force to plastically

displace material. Many dissimilar metal combination can be joined.

In conventional friction welding, relative rotation

between a pair of work pieces is caused is whilethe work pieces are urged together.

Friction Welding is a type of forge welding, i.e.

welding done by the application of pressure.

Introduction of Friction Welding


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Solid

StateWelding

Electrical

Chemical

Mechanical

Friction Pressure&

Deformation

Friction

Weld


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Principle

The principle of this process is the changing of mechanical

energy into heat energy.One component is gripped and rotated

about its axis while the other component to be welded to it is

gripped and does not rotate but can be moved axially to make

contact with the rotating component. At a point fusion

temperature is reached, then rotation is stopped and forging

pressure is applied.Then heat is generated due to friction and isconcentrated and localized at the interface, grain structure is

refined by hot work. Then welding is done, but there will not

occur the melting of parent metal.


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1.One component

rotated rapidly, the

other is stationary

2.Rotatingand

stationary components

brought together into

contact and forceapplied

3. Axial force is

increased to bringcomponents into a

plastic state at

interface


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4. Rotation is stopped and

more axial force is applied

5. Result - A full cross

sectional weld in the

complete metal.


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Linear Friction Welding

Rotary Friction Welding

Inertia Friction Welding

Friction Stir Welding

Types of Friction Welding


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The work pieces are

brought together under

pressure for a predeter-mined time, or until a

preset upset is reached.

Then the drive is

disengaged and a breakis applied to the rotating

work piece.

Workpieces

Non-rotating viseMotor

Chuck

SpindleHydraulic cylinder

Brake

Rotary Drive Friction Welding


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One of the work pieces is

connected to a flywheel; the

other is clamped in a non-

rotating axial drive

The flywheel is accelerated to

the welding angular velocity.

Frictional heat is produced at

the interface. An axial force is

applied to complete welding.

Spindle

Workpieces

Non-rotating chuck

Hydraulic cylinder

FlywheelMotor

Chuck

Inertia Welding Process


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Friction Stir

Welding Parts to be joined are

clamped firmly.

A rotating hardened steel

tool is driven into the jointand traversed along the joint

line between the parts.

The rotating tool produces

friction with the parts,

generating enough heat and

deformation to weld the

parts together.

Butt welds

Overlap welds


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Friction Surfacing


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The joint face of at

least one of the

work piece musthave circular

symmetry (usually

the rotating part). Typical joint

configurations

shown at right.

Rod Tube Rod to tube

Rod to plate Tube to plate Tube to disc

Friction Welding Joint Design


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Advantage

1. Material and machining cost savings.2. High production rates.

3. Similar and dissimilar material joined with no added fluxes

or filler metals.

4. Low distortion.

Disadvantage

1. Machine need sufficient power.

2. Angle of the job can not weld properly.

3. Heavy Force is required.


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Used in commercial parts like bi-cycle

parts, medical equipment etc.

Used in automotive industry to

manufacture front wheel drive shaft

joints, wheels and rims. Used in aerospace & agricultural field.

Friction Welding Applications


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Friction Welded Automotive HalfshaftFriction Welded Joint

Friction Welded Joints


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References

Wikipedia.org

www.google.com
http://www.google.com/http://www.google.com/


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THANK YOU

Documents

TECHNICAL SEMINAR ON Friction Welding - Sourav Mondal