The working principle of plasma cutting machine
Plasma is heated to very high temperature and highly ionized gas, it will arc power will be transferred to the workpiece,plasma cutting machine high heat so that the workpiece melting and blown away to form a plasma arc cutting work.
Compressed air into the torch by the air distribution of two, that is, the formation of plasma and auxiliary gas. The plasma gas arc acts as a molten metal, while the auxiliary gas cools the individual parts of the torch and blows off the molten metal.
The main circuit includes contactor, high leakage resistance of the three-phase power transformer, three-phase bridge rectifier,plasma cutting machine high-frequency arc coil and protective components and other components, the main circuit and the control circuit in two parts. By the high leakage resistance to steep the power of the external characteristics. Control circuit through the torch on the button switch to complete the entire cutting process:
Pre-ventilation - main circuit power supply - high frequency arc - cutting process - arc - stop.
The main circuit of the power supply by the contactor control; gas short by the solenoid valve control;plasma cutting machine by the control circuit to control the high-frequency oscillator ignition arc, and after the establishment of the arc to stop high-frequency work.
In addition, the control circuit still has the following internal locking function: thermal control switch action, stop working.