Plasma cutting procedure

19 September 2019
Conventional plasma cutting and HQC (High Quality Cutting) procedure for cutting metal by means of a plasma torch

Plasma cutting is a well-known advanced technology for cutting metals, due to its good quality-price ratio.
The resulting cuts are high quality and above all they are ideal for high levels of productivity due to the processing speed achieved.
The procedure initially involves an arc strike stage: a gas is introduced between electrode (cathode) and nozzle (anode). A high voltage and frequency electrical discharge causes it to ionise and convert to a plasma, which acts as a conductor and generates a pilot arc. When the pilot arc comes into contact with the metal to be cut, the electrical circuit closes on the metal and a cutting arc is obtained with high thermal energy density that melts the metal in order to cut through it.

The following components are necessary for this type of welding:

  • A power source
  • A torch consisting of:
  • A handle
  • A torch body including an electrode, gas diffuser, nozzle and shield

The HQC system for high-definition plasma cutting allows a cutting quality level comparable to that of a laser, but with considerably lower operating costs.