This presentation discusses waterjet machining. It is a versatile machining process that uses high-pressure water or water mixed with abrasives to cut materials. Waterjet machining is useful for both soft materials cut with plain water jets and hard materials cut with abrasive water jets. It has advantages over other cutting techniques in that it produces no heat affected zone, can cut a wide range of materials, and is environmentally friendly. The presentation provides details on the history, mechanisms, applications and capabilities of waterjet machining.

1. A Presentation ON
Submitted by:
Vishwanath S
5th sem
ME Department

2.  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.

3.  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

4.  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

5. Abrasive 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

6. 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

7. Pump
 Nozzle
 Orifice
 Control System

9.  No heat affected zone
 Saves the raw material
 Wide range of materials
 Faster than any other technique
 Flexible Machining Integration
 Does Not Need a Starting Hole
 Ability to Cut in Any Direction
 Environmentally friendly
 No need for surface finish
 No tool changing
 Minimal Fixturing Required

10.  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

11.  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”

12. Aerospace
Automotive
Food Processing
Electronics and
PCBs
Marble Industry
Concrete

13. Ceramic part cut with an abrasive water
jet
Steel gear and rack cut with an abrasive
water jet

14.  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

15. Questions……?
THANK YOU…  