How is plasma arc cutting created?
Plasma arc cutting, also referred to as plasma fusion cutting or plasma cutting, is a fabrication process which employs superheated, ionized gas funneled through a plasma torch to heat, melt and, ultimately, cut electrically conductive material into custom shapes and designs.
What is plasma in advance manufacturing process?
At this temperature, the gases are partially ionized and exits in the form of a mixture of free electrons, positively charged ions and neutral atoms. This mixture is termed as plasma. When such an ionized gas is directed on the workpiece through a high velocity jet, the metal is removed by melting.
What are the applications of plasma arc machining process?
Applications of Plasma Arc Machining This is chiefly used to cut stainless steel and aluminium alloys. Profile cutting of metals, especially of these metals and alloys, has been the common prominent commercial application of PAM.
What is the principle of plasma arc machining?
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.
What two methods are used to start plasma arc cutting arc?
What are two methods for establishing the plasma path to the metal being cut? High frequency alternating current and a pilot arc.
How does plasma arc cutting increase productivity?
Faster cutting speeds increase productivity by 25 percent. Plasma cutting torch is lighter than other tools and reduces operator fatigue. Plasma cutting cuts all electrically-conductive metals.
Which gas is used in Pam?
Using plasma arc melting, the metal is melted under inert gas atmosphere (usually Helium or Argon) in a pressure range between 400 – 1,200 mbar abs. The plasma arc torch column provides the heat source with maximum temperatures well above 15,000 K.
What are the advantages of plasma arc machining?
Advantages of Plasma Arc Welding ➨Torch design allows better control of arc. ➨This method provides more freedom to observe and control the weld. ➨The higher heat concentration and plasma jet allows faster travel speeds. ➨The high temperature and high heat concentration of plasma allow keyhole effect.
What are the parts of plasma arc machining?
Components of Plasma Arc Machining:
- 1 Plasma Gun: Different gases like nitrogen, hydrogen, argon or mixture of these gases are used to create plasma.
- 2 Power Supply: DC Power Supply is used to develop two terminals in the plasma gun.
- 3 Cooling Mechanism:
- 4 Workpiece:
What are the two types of plasma arc cutting processes?
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 the most commonly used starting method for initiating a plasma arc?
One starting method is via a capacitive discharge into the primary circuit through an SCR (silicon controlled rectifier). This releases a short high energy burst to create a spark to transfer the arc. The ‘blow apart’ arc method features the tip and electrode initially in contact within the torch head.
What is plasma state and plasma arc machining?
Plasma State lies in between temperatures 11,000ºC to 28,000ºC. What is Plasma Arc Machining? Basically, Plasma Arc Machining (PAM) is a metal cutting process where metals are cut with plasma arc, tungsten-inert-gas arc or a torch.
What is plasma arc cutting used for?
Working principle Plasma arc cutting is a very complex process that is used in order to cut steel and other metals (or sometimes other materials) using a plasma torch. In this process, an inert gas is blown at high speed out of a nozzle.
What is the working principle of arc cutting?
4. Working principle Plasma arc cutting is a very complex process that is used in order to cut steel and other metals (or sometimes other materials) using a plasma torch. In this process, an inert gas is blown at high speed out of a nozzle.
What are the applications of plasma in machining?
On the machining side, plasma has been used successfully in conventional turning and milling of very difficult materials. The principal advantage of this process is that it is almost equally effective on any metal, regardless of its hardness or refractory nature.