K L E SOCIETY’S POLYTECHNICBAILHONGAL-591 102

A Presentation ON

“Water Jet Cutting”Submitted by:Vishwanath S

5th sem

ME Department

Introduction to Water jet It is the fastest growing machining process.

One of the most versatile machining processes.

Compliments other technologies such as milling, laser, and plasma.

True cold cutting process – No HAZ , mechanical stresses or operator and environmental hazards.

Not limited to machining – but also used in food industry applications.

Evolution of Water jet : 1930s: Mining Industry to remove stones and coal

1960s : Need to cut advanced materials for aerospace industry

1970s : First attempts were to employ WaterJet to cut advanced composites for aerospace

applications.

1980s: First commercial AWJ machines

TYPES OF WATER JET CUTTING Water jet cut Abrasive jet cut Abrasive water suspension jets

Water jet : Water jets are used for cutting soft

materials

Water Jet Machinable Materials

Like Soft rubber, foam, tin foil, carpet, soft gasket material

Abrasive water jetAbrasive water jets for hard materials

An abrasive element is added to the water beam to assist cutting

Abrasive Water Jet Machinable materials: Titanium, aluminum, stone, hard rubber,

hardened tool steel

Components

Pump

Nozzle

Orifice

Control System

PRINCIPLE OF WORKING

Fig. Structure of a water jet machining.

Slurry system mixes the water with abrasive

Abrasive water through out the system

The abrasive water is accelerated into the steam

Steam out the orifice

8

Nozzle

Components – Control System

Advantages: No heat affected zone

Saves the raw material

Wide range of materials

Ability to Cut in Any Direction

Environmentally friendly

No need for surface finish

No tool changing

Disadvantages: Limited number of materials can be cut economically

Very thick parts can not be cut with Water Jet

Cutting and still hold dimensional accuracy

Slower cutting

Higher entry cost

WaterJet v/s Laser No Heat Affected Zone

Can Cut Through Reflective Materials

Can Cut Uneven Surfaces Smoothly

Environmentally friendly

Can Cut Up to 12” in hard materials (Ti, SS)& 24” in Rubber

Minimal Heat Affected Zone

Reflects on Shiny Surfaces

Laser Diffracts and Looses its Focus

Produces Toxic Fumes

Max. Depth 0.5 – 0.75”

Applications

Aerospace

Automotive

Food Processing

Electronics and PCBs

Marble Industry

Concrete

Applications

Ceramic part cut with an abrasive water jet

Steel gear and rack cut with an abrasive water jet

Conclusion:

It is relatively a new technology which has caught on quickly and is replacing century-old methods used for manufacturing

Used not only in typical machining applications, but food and soft-goods industries

As material and pump technology advances faster cutting rates, longer component life and tighter tolerances will be achievable

Paves the way for new machining processes that embrace simplicity and have a small environmental impact

Questions……?

THANK YOU…