Views: 0 Author: Site Editor Publish Time: 2024-08-20 Origin: Site
Plasma torch also known as plasma arc welding gun, is an advanced tool that uses plasma arc as a heat source for welding. Its working principle is based on plasma arc welding method, which achieves material melting and connection by generating high-temperature and high-energy plasma airflow. So, how does a plasma torch work? Regarding this issue, let the plasma torch supplier provide us with a detailed introduction!
The plasma torch is mainly composed of upper gun body assembly, lower gun body assembly, tungsten electrode, electrode pressure head assembly, electrode clamp, sealing ring, nozzle, protective gas nozzle and pipeline, handle, switch and other parts. The nozzle is a key component of the welding gun, which is divided into two parts: the nozzle inner body and the nozzle outer body. An insulating ring is set between the two to ensure electrical insulation. The inner and outer walls of the nozzle are lined with high melting point metal liners to withstand high temperatures and wear.
The working principle of plasma torch:
The working principle of plasma torch is based on gas ionization and the formation of plasma arc. When the welding chamber is in a vacuum state, the gas (usually argon) is ionized by the high voltage when the welding gun is started, forming positive ions, negative ions, and electron plasmas. These charged particles flow in an orderly manner under the action of thermal and electric fields, forming an electric current and continuously bombarding the negative electrode (usually a sponge titanium electrode), generating high temperatures. The high temperature melts the negative electrode material, thereby achieving welding.
Specifically, plasma arc welding guns use a compression arc (transfer arc) between the tungsten electrode and the workpiece or a compression arc (non transfer arc) between the tungsten electrode and the nozzle for welding. When an arc heats gas, the gas dissociates to form a plasma stream, which is compressed when passing through a water-cooled nozzle at high speed, increasing energy density and dissociation degree, forming a plasma arc. The stability, heat generation, and temperature of plasma arc are higher than those of general arc, therefore it has greater penetration force and welding speed.
What are the types of plasma torch
Plasma torch is mainly divided into medium current plasma arc welding guns, high current plasma arc welding guns, and micro beam plasma arc welding guns according to their current size and purpose.
Medium current plasma arc welding gun: suitable for welding metal plates of general thickness, with moderate penetration force and welding speed.
High current plasma arc welding gun: suitable for welding thick plates and large workpieces, capable of generating greater penetration force and welding depth.
Micro plasma arc welding gun: suitable for welding thin plates, precision parts, and small components, with a small heat affected zone and high welding accuracy.
Application of plasma torch in cutting:
Plasma torch can be used for cutting metal and non-metal materials. Plasma arc cutting uses high-speed, high-temperature, and high-energy plasma airflow to heat and melt the material being cut, and uses internal or external high-speed airflow or water flow to displace the melted material until the plasma airflow beam penetrates the back and forms a cutting edge. This method has the advantages of fast cutting speed, smooth incision, and small heat affected zone, and is widely used in fields such as metal processing, shipbuilding, and automobile manufacturing.
As an advanced welding tool, the working principle of plasma torch is based on the formation and application of plasma arc. By ionizing gas with high voltage to form a plasma stream, and utilizing its high-temperature and high-energy properties to achieve material melting and bonding. Plasma torch have the advantages of high melting force, fast welding speed, and high weld quality, and are widely used in fields such as aerospace, automotive manufacturing, and petrochemicals. At the same time, attention should be paid to safety issues such as power grounding, light radiation protection, smoke and noise protection during use. Through continuous technological advancements.