12-12-2012, 12:43 PM
Plasma Arc Machining
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Plasma Arc Cutting
PAC is a thermal material removal process that is primarily used for cutting thick sections of electrically conductive materials.
Plasma can be defined as a “superheated, electrically ionized gas.”
PAC Process
PAC uses a high velocity jet of plasma (Temperatures range from 10,000 to 14,000 oC) to cut through the metal by melting it.
The high gas flow rate facilitate the removal of molten metal through the kerf
Stream pressures can reach up to 1.4 MPa.
Gases Used
Primary Gases:
Gases that are used to create the plasma arc. Examples are nitrogen, argon, hydrogen, hydrogen, or mixture of them
Secondary Gases or Water:
Surrounds the electric arc to aid in confining it and removing the molten material.
Other Plasma Uses
Plasma Arc Welding (PAW)- plasma arc is produced and aimed at the weld area to weld.
Applications- Used for butt and lap joints because of higher energy concentrations and better arc stability.