Water jet machining is a non-traditional machining process that uses a high-velocity water jet to cut and machine soft, non-metallic materials. It works by removing material using the erosive power of a finely focused water jet. The water is pumped to high pressures, then passed through a nozzle to create the jet. Key parameters that affect the process include standoff distance, fluid pressure, feed rate, and nozzle diameter. It can precisely cut a variety of materials like wood, rubber, and composites, with advantages being low heat impact, clean cuts, and ability to cut explosives safely. However, it is limited to soft materials and not suitable for high volume production.

1. Water Jet
Machining
Definition, Principle, Working, Parameters, Advantages,
Applications

2. WATER JET MACHINING DEFINITION
▪ A Non-conventional machining process In which a
high-velocity water jet is used to remove materials
from the surface of the workpiece.
▪ Water jet machining(WJM) is a mechanical energy based
non-traditional machining process used to cut and machine
soft and non-metallic materials.
▪ It uses the high-velocity water jet to cut a non-metallic
workpiece smoothly.
▪ However, It is just similar to Abrasive jet machining.

3. PRINCIPLE-
Here is the principle of water jet machining-
▪ It works on the principle of water erosion.
▪ When a high-velocity water jet strikes the surface, the removal of metal takes place.

4. PARTS AND CONSTRUCTION-
Various part is used to construct the Water jet machine-
• Storage tank
• Pump
• Intensifier
• Tubing
• Accumulator
• Control valve
• Nozzle
• Regulator
• Drain System
Read in-depth about parts and its construction- Water Jet
machining

5. WORKING OF PLASMA ARC MACHINING
• Initially, water from the reservoir is pumped to the intensifier using a
hydraulic pump.
• Intenstifier increases the pressure of water up to 200-400mPa.
• An excess supply of water sends to the accumulator for temporary storage.
• Then the required quantity of pressurized water enters the nozzle through a
control valve and flow regulator.
• When a water jet strikes with very high velocity, it induces a trace on the
workpiece.
• These induced traces further intensify, causing the removal of material for
the workpiece.
▪ Read in-depth about working- Water Jet machining

6. FIG.- DIAGRAM OF WATER JET MACHINING

7. PROCESS PARAMETERS
▪ Various water jet machining process parameters are given below-
• Standoff distance
• Fluid pressure
• Feed rate
• Jet fluid
• Nozzle diameter
▪ Read in-depth about process parameters - Water Jet machining

8. ADVANTAGES OF PLASMA ARC MACHINING
The various advantages of WJM are-
• Excellent precision
• Water is cheap, non-toxic, readily available and can be easily disposed of.
• Water jet approaches the ideal single point tool.
• The process gives a clean and sharp cut.
• Unlike the conventional machining process, this method does not generate heat.
• Best suited for the explosive environment.
• Noise is minimized as the power units and pumps can be kept away from the
cutting point.
• No moving parts, therefore, less maintenance is required.
• Read more on Advantages - Water Jet machining

9. DISADVANTAGES OF PLASMA ARC
MACHINING
The various disadvantages of WJM are-
• Only soft materials can be machined.
• Very high thick materials can not be machined easily.
• The initial cost is high
• Not suitable for mass production.
• Read more here - Water Jet machining

10. APPLICATIONS OF WATER JET MACHINING-
• Useful for cutting materials that are porous, fibrous, granular, or soft.
It includes the materials like corrugated board, rubber, granite,
plywood, glass, aluminum.
• To cut wood, ceramics, composites, leather, foam, wire stripping and
deburring.
• In aerospace and other similar industries, a water jet is cut off asbestos
to minimize airborne dust in the atmosphere.
• Used to cut fiberglass and polyethene automotive parts.

11. THAT’S IT FOR
NOW
▪Thank you for watching
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