Materials Cut
Materials and thickness
To date,
the most profitable precision applications involve metals such as aluminum, tool
steel, stainless steel, mild steel and titanium in thicknesses up to about 1"
(2.5 cm). These materials are widely used and found in many engineering
applications. They are also very straightforward to machine on a PC-controlled
precision abrasivejet system, and part tolerances of ±0.005" (±0.1 mm) with good
surface finishes are readily attained.
An abrasivejet can make almost any two-dimensional shape imaginable - quickly and
accurately - in material less than 1" (25 mm) thick. The only limitation comes
from the fact that the minimum inside radius in a corner is equal to 1/2 the
diameter of the jet, or about 0.015" (0.4 mm) or 0.010" (0.25 mm) with the OMAX
Mini-Jet nozzle.
Aluminum
Aluminum is a
light weight but strong metal used in a wide variety of applications. Aluminum
is a relatively soft metal and is easily machined on the OMAX JetMachining
Center. Generally speaking, it machines at about twice the speed as mild steel,
making it an especially profitable application for the OMAX.
Aluminum is difficult to machine on a laser in thicknesses over 1⁄4" (0.6 cm). Many
precision abrasivejet machines are being purchased by laser shops specifically
for machining aluminum. Aluminum is often called the "bread and butter" of the
abrasivejet industry because it cuts so easily.
Ceramics
Ceramics are made by heating up minerals to a high temperature. Traditionally, ceramics have
been made from clay, but modern ceramics are made from substances such as
alumina and from synthetic materials. Ceramics are electrical insulators and
resist corrosion.
Composites
Composites are
similar to fiberglass and consist of layers of material. Abrasivejets can
machine composites without leaving a burr or shredding the layers of material,
while maintaining a better edge quality.
Copper
Machining copper can be challenging, but abrasivejet systems make cutting copper easy. Copper is
impossible to cut on a laser due to reflection. It is also difficult to machine
conventionally, because it tends to gum up conventional cutting tools.
Abrasivejets are the clear choice for copper.
Exotic Alloys
OMAX JetMachining centers can machine many different materials with ease. This
includes all sorts of exotic materials that might otherwise be quite difficult
to machine such as Inconel®, Hastalloy, hardened tool steel, titanium, and many
other materials.
Glass
Glass is a unique substance that was traditionally been difficult to machine. Although it has a
great deal of structural strength, even small scratches on the surface can lead
to breaking and shearing.
Hardened Tool Steel
Tool
steel is difficult to machine conventionally, particularly once it's hardened,
but is fairly easy to machine on an abrasivejet system. With an OMAX, you can
harden the steel before or after cutting. Steel hardness has only a minor effect
on the rate at which it can be machined with an abrasivejet.
Rubber
Rubber can be cut
with a water-only nozzle for faster and cleaner cutting, though some very hard
rubbers may require abrasive. Water-only cutting wastes little material, is
quieter and increases the nozzle life. Water-only cutting also proceeds very
quickly at speeds of 100 inches per minute or faster.
Stainless Steel
Stainless
steel is steel mixed with various amounts of chromium, which adds rust and stain
resistance to the steel. Stainless steel machines easily with the
OMAX® without heat or distortion. All grades of stainless steel
machine easily on the OMAX, even those such as 304 that are difficult to machine
with other processes.
Steel
Steel is a very
common material, is relatively easy to cut, and the OMAX® will cut
all grades of steel.
One advantage of the OMAX is that you can cut steel
after it has been hardened with minimal slow-down of cutting. The lack of heat affected zone from the abrasivejet means that
you do not change the heat treatment of the steel as you cut it. The OMAX also
produces a smooth cut on the edge without burn marks, cracking, excess burr, or
other problems typically associated with heat-based cutting.
Stone
OMAX®
JetMachining® Centers can also be used to create designs from stone
such as marble and granite. This can be done faster, and with a greater level of
detail than traditional methods of working with these materials.
Titanium
Titanium is a
lightweight, strong metal that is corrosion resistant. Titanium is as strong as
steel, but only 45% as heavy. It is also frequently used in combination with
other metals.
Titanium is difficult to machine conventionally and
susceptible to the Heat Affected Zone associated with laser and wire EDM.
Titanium cuts very well using a precision abrasivejet.
Titanium cuts
faster than steel on the OMAX. One of the huge advantages of cutting titanium
with an OMAX is that you can save a lot of material. Typically, you can fit
additional parts in a given piece of material, and the scrap that is left over
is in chunks, instead of chips, meaning that it is still useful material. Since
titanium is extremely expensive, this is a big advantage.
Wood
It's hard to beat a
simple jigsaw, but some precision abrasivejet systems are being used to cut
wood, typically for special intricate shapes and only after delivering a return
on investment via metal parts production.