Consumable Plasma Cutters - Pros & Cons
A plasma cutter is a device which can cut through a metal using
super heated gases emitted from its nozzle. Thy can focus approximately
30,000 degrees Fahrenheit of heat in the tightly-focused emission, cutting
into the thickest metals in moments. They are also known as plasma
torches.
Uses of Plasma Cutters

Plasma
cutters first came into existence in the Second World War.
The Allies used their immense power & easy application to produce aircraft
& armoured vehicles in large numbers. Since then, they were used in
aeronautics & construction & also by vehicle manufacturers & locksmiths.
Artists also utilized them frequently in metal works & sculptures.
How Plasma Cutter Functions

Gases like nitrogen, argon or oxygen is released through
a narrow nozzle. Inside, there is an electrode. It pumps electrical
current into the gases in a process known as Ionization.
Due to ionization, the atoms in the gases jolt around with stimulation.
They divide the electrons from the nuclei & thereby form Plasma.
This is pushed into its highest state of activity. This activity causes
an enormous surge of energy which can be utilized in the toughest industrial
components.
Selecting a Plasma Cutter
One should be careful not buy a piece which is more
powerful than is necessary due to their high prices. If there is regular
use for a plasma cutter, an unit with more power can
used. Heavy units maybe necessary for certain requirements. Sometimes
a high priced portable generator has to be arranged. It can pass through ferrous
materials. By definition, plasma is the fourth state of matter next
to solid, liquid & gas, in order. Plasma is an ionized gas, a gas into
which sufficient energy is provided. It will free electrons from atoms/molecules
& it will allow both ions & electrons to co-exist. If a gas is boosted
to extremely high temperature, plasma comes into force. When the fast
moving electrons collide with other electrons & ions, enormous amounts
of energy are released. Unbelievable cutting power is the result of
this energy.
Plasma cutters work by sending a pressurized
gas through a small channel in the cutting nozzle. In the centre of
this channel, there is a negatively-charge electrode. If power is applied
to the negative electrode, if the tip of the nozzle touches the positively
charged metal, this creates a circuit resulting in very powerful spark.
When the gas passes through the channel, the spark heats the gas to
the highest temperature. The plasma temperature can reach up to maximum
30,000 degree Fahrenheit.
Plasma cutters work by creating a high velocity plasma flow between
a negatively charged electrode & a positively charged one. If you use
a plasma cutter, the surface of the metal area outside
of the cutting area remains cool. This prevents warping & paint damage.
Compared to traditional torches, plasma is faster than other gases &
does not depend upon highly flammable gases. They have become the mainstay
of any industry. In plasma cutting, the shapes can
be arranged in a computer system before cutting. Thanks to modern technology,
it is possible to cut metals with laser precision. It is different from
conventional welding torch. The highly-charged & extremely-heated
temperature jet of plasma will melt through metal at the contact point
without creating any impact on the surrounding material. For small jobs
in a workshop like bodywork patch & replacement panel, plasma
cutters offer the ideal solution.
As plasma cutters use an inert gas,
volatile & explosive gases need not be stored. Previously, plasma cutters
were not accurate in cutting metals due to their large frame. They are
now capable of producing a focused flame due to latest technology. Their
prices are below $1000. Fire power 12 amp plasma cutter with its own
compressor is priced at $998.75. This tool meant for small jobs in a
workshop can do multiple functions. Plasma cutters
were used cut conductive materials such as copper, silver & gold. Of
late, non-metallic conductors like graphite also are cut by plasma cutters.
They are used for sheet metal in curved or angled shapes. Modern plasma
torches are sold at comparatively cheaper rates. They are used
in custom auto shops & car manufacturing factories. Construction companies
also use them. Locksmiths also use plasma cutters to
drill into safes & vaults. The following variations such as: Hypertherm,
Cyberweld, Millerwelds & Plasma cutter are employed for different functions.
These most-modern & improved versions cost only $300.
Before buying
a plasma cutter, one has to think about three important
points.
- The thickness of the metal.
- The maximum thickness normally subjected to cutting.
- The speed of operation or the time frame for completing the job.
Finally, before starting operation, note the following
aspects. Safety equipment, reading the owner's manual,
inspecting the torch tip, replacement of worn out items & checking air/gas
gauge.
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