Company Details

Huaying Chuang Precision Machinery Co., Ltd. [Guangdong,China] Business Type:Agent , Distributor/Wholesaler , Manufacturer , Service Main Markets: Americas , East Europe , Europe , Africa , Asia , Caribbean , Middle East , North Europe , Oceania , Other Markets , West Europe , Worldwide Exporter:81% - 90% Certs:ISO9001, RoHS, GB

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The Principle of Popular Science Plasma Cutting

2021-11-08

The principle of plasma cutting is: arc discharge is performed between the base material, including the nozzle in the cutting torch and the electrode in the cutting torch, and the discharge heat is used to generate high-temperature, high-speed plasma arc from the compressed gas, and the cutting method of fusing the base material.
The characteristics of air plasma cutting: It can easily cut all metals, fast cutting speed, less cutting deformation, can be cut without a fixed clamp, and the cutting shape is not limited.

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Both contact and non-contact cutting are not required, and the operation is simple.
Widely used in industrial production, especially the welding of copper and copper alloys, titanium and titanium alloys, alloy steel, stainless steel, molybdenum and other metals used in military and cutting-edge industrial technologies such as aerospace, etc., such as titanium alloy missile shells and spacecraft Some thin-walled containers, etc.
Types of plasma arc

According to the different power connection methods, plasma arc has three forms: non-transferred, transferred and combined:
1. The non-transferable plasma arc tungsten electrode is connected to the negative end of the power supply, and the nozzle is connected to the positive end of the power supply. The plasma arc body is generated between the tungsten electrode and the nozzle. Under the pressure of plasma gas, the arc column is ejected from the nozzle to form a plasma flame. .

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2. Transfer type plasma arc: The tungsten electrode is connected to the negative end of the current, and the weldment is connected to the positive end of the current. The plasma arc is generated between the tungsten electrode and the weldment. Because the transfer arc can transfer more heat to the weldment, metal welding and cutting almost all use the transfer plasma arc. In order to establish a transfer plasma arc, the tungsten electrode should be connected to the negative pole of the power supply, and the nozzle and the weldment should be connected to the anode at the same time. Quickly connect the circuit between the tungsten electrode and the weldment, so that the arc is transferred to the tungsten electrode and the weldment for direct combustion, and the circuit between the tungsten electrode and the nozzle is cut off at the same time

3. Combined plasma arc The non-transferred arc and the transferred arc coexist at the same time when working, so it is called the combined plasma arc. The non-transferred arc plays the role of stabilizing the arc and supplementary heating, and the transfer arc directly heats the weldment to melt it for welding. Mainly used for micro-beam plasma arc welding and powder surfacing welding.

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