Working Principle And Characteristics of The Plasma Cutting Machine

● Working Principle

Plasma is a gas that is heated to a very high temperature and is highly ionized. It transfers the arc power to the workpiece. The high heat causes the workpiece to melt and be blown off, forming the working state of plasma arc cutting. 

After the compressed air enters the cutting torch, it is distributed by the gas chamber to form plasma gas and auxiliary gas. The plasma gas arc functions to melt the metal, while the auxiliary gas cools the various parts of the torch and blows off the molten metal.

The cutting power supply includes two parts: the main circuit and the control circuit. The electrical principle: the main circuit includes a contactor, a three-phase power transformer with high leakage reactance, a three-phase bridge rectifier, a high-frequency arc ignition coil, and a protection component. Caused by the high leakage reactance, the external characteristics of the power supply are steep. The control circuit completes the entire cutting process through the button switch on the cutting torch:

Pre-venting—main circuit power supply—high-frequency arc ignition—cutting process—discharge arc—stop.

The power supply of the main circuit is controlled by the contactor; the gas flow is controlled by the solenoid valve; the control circuit controls the high-frequency oscillator to ignite the arc and stops the high-frequency operation after the arc is established.

Besides, the control circuit also has the following internal locking functions: the thermal switch operates and stops working.

● Features

The plasma cutting machine with different working gases can cut all kinds of metals that are difficult to cut with oxygen, especially for non-ferrous metals (stainless steel, carbon steel, aluminum, copper, titanium, nickel). The cutting effect is better; its main advantage is that the cutting thickness is not For large metals, the plasma cutting speed is fast, especially when cutting ordinary carbon steel sheets, the speed can reach 5-6 times that of oxygen cutting, the cutting surface is smooth, the thermal deformation is small, and there is almost no heat-affected zone.

Plasma cutting machine, the available working gas (working gas is the conductive medium of the plasma arc, it is the heat-carrying body, and at the same time the molten metal in the incision must be removed) has obvious effects on the cutting characteristics, cutting quality and speed of the plasma arc. influences. Commonly used plasma arc working gases are argon, hydrogen, nitrogen, oxygen, air, water vapor, and some mixed gases.

●The Advantages of Our Machine

⒈We have detailed teaching video for customer, like step by step and hand by hand to teach how to use machine and software .etc, so even a freshman will learn machine using faster and easier. While most other factory only have word instructions, we met many customer misunderstand when read the word instruction and lead to operate wrong and damage the machine.

⒉The painting: all our machine body have been processed by professional anti-rust treatment. First, we spray 2 times anti-rust paint to ensure that all parts of the machine in a fully protected state, and then spray color. This can effectively prevent the machine rust, resulting in damage to the machine. Other manufacturers do not take anti-rust treatment or only spay 1 time rust paint. 

⒊Software: our software have self-adjust function. That means, when you put the metal sheets slide, the software will adjust the cutting according to metal sheets direction, so that it will protect the metal sheets and good cutting results. Especially when cut large or expensive metal sheets, this will preventing big loss. While other factory machine does not have this function.

⒋Our machine support many languages, like English, Russian, Spanish etc. Then the clients can operate the machine more convenient.

⒌When cutting many drawings, our software can automatically sort and achieve best combination, so that the machine can cut all drawings in shortest time.

⒍We use super soft shielded cable to ensure that the plasma power supply does not affect the motor during working.

⒎ Just because our machine all equipped the professional parts, and test more seriously for the whole machine, so our guarantee period it is 2 years, while other factory it is only 1 years.

⒏We will free provide 2G processing design, in the 2G processing design have thousand beautiful graphic, after you get the machine, you can let the machine do a lot of beautiful work, while no need find the engineer to help you to design.