What is plasma arc machining process?

What is plasma arc machining process?

Plasma Arc Machining is used to remove material from the workpiece. In this process, a high velocity jet of high-temperature gas is used to melt and remove material from the workpiece. In this process, a high velocity of high temperature air is used to remove material from the workpiece by melting it.

What are the two stages in plasma arc machining?

4.2. 1.2 Types of plasma arc machining system. There are two types of Plasma Arc Machining (PAM) Systems such as Transferred Arc PAM system and Non-Transferred Arc PAM system. In Transferred Arc PAM system, Plasma arc is transferred between electrode and workpiece.

What is plasma in machining?

Plasma arc machining is a metal removal process in which the metal is removed by focusing a high-velocity jet of high temperature (11,000°C to 30,000°C) ionized gas on the workpiece.

Which process parameters are important in plasma arc machining?

Four process parameters were examined, namely the cutting speed, the cutting current, the plasma gas pressure and the distance of the plasma torch from the workpiece surface (cutting height).

What are three dangers of plasma cutting?

What are the dangers of plasma cutting? here are a few dangers: electrical risks, damage of your eyes and the danger of breathing in metal dust and other debris kicked up from the interaction between the plasma and the metal on which you’re working.

Which gas is used in plasma arc cutting?

Argon gas is used when plasma marking (a whole other subject). A mixture of Argon and Hydrogen is often used when cutting thicker Stainless Steel or Aluminum. Some people use a mixture of Hydrogen and Nitrogen, or Methane and Nitrogen when cutting thinner Stainless Steel.

How hot is plasma arc?

The basic principle is that the arc formed between the electrode and the workpiece is constricted by a fine bore, copper nozzle. This increases the temperature and velocity of the plasma emanating from the nozzle. The temperature of the plasma is in excess of 20 000°C and the velocity can approach the speed of sound.

Where is plasma arc machining used?

It is mostly used for cryogenic, high temperature corrosion resistant alloys. It is also used in case of titanium plate up to 8mm thickness. PAM is used in nuclear submarine pipe system and for welding steel rocket motor case. PAM is prominent for the applications related to stainless tube and tube mills.

What is plasma arc machining describe with schematic diagram?

The schematic arrangement of plasma arc machining is shown in Fig. The plasma arc cutting torch carries a tungsten electrode fitted in a small chamber. This electrode is connected to the negative terminal of a DC power supply. So it acts as a cathode.

Can a plasma cutter damage your eyes?

Plasma cutting arcs can also be very intense, because the arc current is typically anywhere from 100 to 800 Amperes. Needless to say, looking at an arc that intense can easily cause eye damage, including permanent damage leading to blindness.

What are the hazards of plasma cutting?