Plasma welding operating principle

Plasma welding, operating principle The technology described below is used for welding metals of any melting temperature, although it is recommended to use the technology for working with refractory alloys. The same device can successfully handle both welding and cutting, making it a fairly versatile tool and technology, which is why it has become widely used in industry and everyday life.

How Plasma Welding Works Based on the localized heating of metal by a plasma stream generated in a plasma torch. Plasma is an ionized gas ejected under pressure through a plasma torch nozzle. This gas contains charged particles that conduct electric current. The gas ionization process occurs directly in the plasma torch under the influence of a high-power compressed electric arc.

The temperature of the generated plasma ranges from 5,000 to 30,000 degrees Celsius, which is sufficient to melt any refractory metal. It's important to note that a typical household plasma unit can produce up to 7,000 degrees Celsius. Provided certain technological requirements are met and the proper conditions are created, plasma can be used to weld metal and non-metallic parts.

What does this type of welding work on?

Despite the impressive characteristics given above, Plasma welding, operating principle It's not complicated, and it's fairly simple to set up and maintain. As mentioned above, this technology uses a directed plasma arc generated by an applied electric current of the required strength (A). The plasma arc, in turn, is formed from a so-called "primary" (normal) arc. The following three key characteristics of the system are:

• Minimum plasma jet diameter;
• High power;
• High operating temperatures.

The above characteristics also influence the design itself, which is quite logical (they can also be read the other way around). To achieve the characteristics described above, the following conditions must be met:

• Intensive cooling of the plasma torch walls is carried out continuously;
• A non-consumable tungsten electrode produced with thorium additives is used;
• It is essential to protect the electrode by supplying inert gas (argon).

Plasma welding: operating principle or how to use it?

Plasma welding principle work which The process involves the following steps, achieving high productivity and weld quality. So, here are the fundamental principles of plasma welding:

• The welding machine transmits current to a plasma torch, where an arc is generated. Then, a gas is introduced to form the plasma. The gas is heated by the arc and ionized. This gas consists of charged ions and electrons, as well as neutral molecules and atoms;
• The resulting plasma is ejected from the torch at a speed of over 2,000 km/h. It has a temperature of 10,000⁰ WITH;
• The compression of the plasma arc is carried out by a plasma torch device, which is cooled with water;
• After this, you need to take the filler wire, put on protective equipment and move the torch nozzle to the joint of the part at a distance of 5 mm. Hold the torch at an angle of 70 ⁰ ;
• Heat the surface until it melts at the joint, forming a weld pool. For high-quality welding, maintain a consistent distance between the nozzle and the joint. Select a torch speed that prevents metal from being blown away. Use filler wire if necessary.

Such plasma welding technology This allows for high-quality joining of parts with minimal expenditure of time, energy, and resources. The process is virtually identical for both industrial and domestic applications.