HIGH-PRESSURE WATERJET CUTTING

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CNC WATERJET CUTTING

Waterjet cutting is a metal fabrication technique that incorporates a carbide nozzle, a fine garnet abrasive and high-pressure jet stream of water to cut metal. Essentially, it's an extreme and sped-up version of erosion, which occurs in nature. A waterjet mixed with other abrasive particles helps to speed up the process.  


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WATERJET FINISHING

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LASER FINISHING

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EDM FINISHING

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PLASMA FINISHING

BENEFITS OF USING HIGH-PRESSURE WATERJET CUTTING


1. No material limitations

Waterjet cutting is versatile applicable, cutting nearly any material; composites, plastics, metals, glass, stone or rock, ceramics, and rubber. With the addition of a granular abrasive, a waterjet cutting machine can perform quality cuts on materials up to 120 mm thickness.


2. No Heat Affected Zone (HAZ)

A major advantage of waterjet cutting is that no heat-affected zone (HAZ) occurs due to its cold cutting method. Not only does cold cutting enable clean cuts, but it also increases the operators’ safety significantly by eliminating the risks of burns.


3. No material distortion

Through its cold cutting method, the heat exposure can be bypassed, which is especially critical for materials like metal, leading to a fine cut without distortion in the material. This results in a smooth and burr-free cut.


4. No additional finishing process

The immediate high cutting quality ensures a precise result, avoiding an additional finishing process. This significantly accelerates the cutting process and saves time, increasing the overall efficiency.


5. No hazardous waste

The growing importance of environmentally friendly processes throughout the industries is becoming more apparent. A significant advantage of waterjet cutting is that it does not create any hazardous waste in the form of fumes and gases, unlike other cutting technologies.


6. Cost Saving

Waterjet requires minimal fixturing and tooling so you can save valuable time on your shop floor. Waterjet cut accurate, clean edges that allow for tight nesting and reduced scrap — saving you money through greater material utilization and waterjet has helped many clients in reducing their cost up to 5%-20%.

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PROCESS
EROSION
Using high speed liquid and
garnet abrasive.
BURNING/MELTING
Using a high
temperature ionized gas arc.
MELTING
Using a concentrated laser
light beam.
EROSION
Using an electrical discharge.
SECONDARY PROCESSING
Usually none. Waterjet is
a cold-cutting process that
leaves a satin smooth edge.
Typically yes. Slag grinding
for removal of HAZ (heat
affected zone) & flattening
to eliminate distortion from
heat. Assist gas used
impacts depth of HAZ
Sometimes yes. Removal
of oxidized edge and HAZ.
Gases used impact depth of
HAZ.
Usually none. Very shallow
HAZ imparted.
MATERIAL
Virtually any material.Primarily steel, stainless
steel and aluminum.
A variety of materials,
but primarily steel, stainless
steel and aluminum.
Conductive materials.
THICKNESS
Up to 120 mm76 mm, depending on
the material.
Generally 26 mm or
less, depending on the
material.
Generally 304mm or less.
CUTTING ACCURACY
+/- 0.005+/- 0.10+/- 0.005+/- 0.005
CUTTING EFFECT
Minimal taper effect
No heat affected zone
Minimal burr effect
High heat affected zone
Distortion
Harden the material
High heat affected zone
Distortion
Harden the material
No Distortion
No heat affected zone
CUTTING EDGE
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CNC WATERJET VS WIRE EDM 


When deciding on a cutting method, the tolerance level determines how much precision you can apply for cutting and shaping work materials.


In this post, we’re going to compare Wire EDM and CNC Waterjet Cutting. Although the techniques may seem to be similar, several differences give EDM cutting an edge over water jet cutting.


CNC WATERJET CUTTINGWIRE-CUT EDM CUTTING

Waterjet technology is a technique used to shape a variety of materials from foam to ceramics to titanium. Using this method, a waterjet is used to produce a very high pressure of steam to make a narrow line in the given material. Depending on the stiffness of the material, a granular abrasive can be added to the waterjet. This helps to increase the cutting power.

You can think of waterjet cutting as a faster EDM machine with less precision. The primary advantage of waterjet cutting is the speed, making cuts 10 times faster than EDM. Waterjet cutting is also not limited to cutting conductive materials.


Waterjet cutting has come a long way because it is possible to improve waterjet precision by increasing the pressure of the waterjet, or by adding a granular abrasive, or by using a nozzle to make the cutting process more flexible. 

Wire EDM cutting is a process that can cut and shape tough materials like titanium and steel. The key is that the workpiece must be electrically conductive.

Then an electrode creates a spark that produces intense heat. Temperatures can enter the range of 8,000 to 12,000 degrees Celsius, easily melting just about anything. This spark is very carefully controlled so that the material can be shaped as water carries away the eroded particles and acts as a coolant. This way the spark only affects the chosen surface of the given material.

One of the major benefits of EDM cutting is highly accurate precision. Wire EDM is about 10 times more accurate than waterjet cutting.

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