Posts Tagged ‘plasma torch’

What are the usages of plasma cutting machines?

Wednesday, June 9th, 2010

The plasma cutters are mainly utilized by the construction people for cutting metals. The plasma cutting works only with electricity and some gases. These are used and seen from World War II. They can also cut heavy metals in lesser time. These are highly conductive than any other gas. The metal is cut when a high temperature of stream melts the metal and it is separated with high velocity.

The plasma cutting machines are used major in manufacturing car and other vehicles. They are also used by Construction Company for cutting metal sheets and large beams. One of the biggest advantages of plasma cutting machine is that the surface of the metal remains cool which prevent from damaging while wrapping. It can cut metals in different shapes and also used for penetrating holes.

Now you can get fully automatic cutter known as CNC. The full form of CNC is computerized numerically controlled cutters. These are generally seen at large scale industries and can cut thick metals. You can now cut the metal vertical with help of this machine.

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Power Supply System on plasma cutters

Tuesday, May 4th, 2010

In addition, plasma cutting machine power supply normally includes: a main inverter circuit, the electric energy supplies in an arc on the plasma-plasma torch, and set fire to with a constant power supply, DC-loop, a circuit for generate high frequency superimposed on a high voltage to a direct arc between the electrode and nozzle of the plasma torch in the output voltage of the main circuit, a circuit that the output voltage of the main circuit between the electrode and nozzle, through the pilot-arc ignition and then makes the stage of the application of the output voltage between the electrode and the work piece so the pilot to create an arc main arc and a power control unit to the main switch, the circuit of circuits with high regularity and the pilot controlling the pilot arc, rotate and subsequently maintain the central arch supports.

Know that the CNC plasma cutter Power Device that these basics are usually restricted in a single chassis contains. Even though the main arc power is supplied by this kind of equipment for plasma cutting power depends on the type of material being cut and thickness, etc., can get to a high value, as several hundred amperes. It is therefore essential to create a circuit with high output capacity.

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Things To Remember When Using Plasma Cutting Machine

Tuesday, December 15th, 2009
  • Replace all damaged parts
  • Check the electrode and cutting tip earlier to each cutting session or after extended usage
  • The electrode will probably be the first part to wear out.
  • Turning up the amps on a damaged electrode will not allow you to cut better, and you risk damaging the cutting torch.
  • If you restore and parts, make sure the gas dispenser goes back on in the proper direction.
  • Ensure cutting chart in metal shop for proper cutting speed and cutting amps.
  • Be aware of splash back towards you when making a sharp cut. Drill a hole first if you need.
  • Excess dross, which should be least if cutting speed and amps are right, can be knocked off simply right after cutting is done.
  • If water comes out of the cutting tip, STOP IMMEDIATELY. This means the air filter needs to be changed.
  • Do not drop sharp objects onto any of the plasma cutting wires.
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An Overview of Plasma Cutting

Tuesday, January 6th, 2009

Plasma is considered the fourth stage of matter because it happens when high heat is applied to a gas. The first stages of matter include ice, water and steam (gas); when you continue to heat the steam it turns into plasma. Plasma is used to cut metals that need a very high heat.

To do plasma cutting the welder must have a plasma torch and it is often used through a machine. Usually a plasma cutter is used when steel and other metals have to be cut. Within the plasma torch an inert gas is blown out of the nozzle at a very high speed. As this continues it forms an electrical arc that travels through the nozzle to the surface of the steel that the welder is cutting which turns the gas into plasma.

Because plasma is very hot it can easily cut through metal and because of the way the process works it blows any melted metal away from the cut. This makes it very convenient for the welder because they do not have to clear away metal the way they would in other types of welding.

There are two types of plasma cutting:

HF Contact — in some machines to cut overall cost you will find this kind of plasma cutter process. It uses a high voltage spark at a high frequency to ionize air. The process moves through the torch head and then when the torch comes in contact with the material it create an arc. This type of machine is limited and it will not cut any CNC application.

Pilot Arc–this type of plasma cutting uses two cycles that produce plasma for cutting. The body of the torch produces a high voltage, low current circuit that starts a high intensity spark. This generates a small pouch of plasma gas that is referred to as a pilot arc. The head of the torch has an electrical path return built in. With these two mechanisms the pilot arc is held back until it hits the metal to be cut. As the plasma and the metal come together the main plasma arc is ignited and the cutting is done.

New technology has created a plasma torch with a smaller nozzle which makes the plasma arc thinner. This gives the plasma the ability to make a cut that is comparable to a laser.

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