Micro-beam plasma welding machine is a kind of fusion welding equipment that uses plasma arc high-energy density beam as heat source. The micro-beam plasma welding machine has the characteristics of concentrated energy, high efficiency, fast welding speed, small stress and deformation, stable arc, etc. It is suitable for welding thin plates and box materials. The editor of Duomu Industry believes that it is particularly suitable for various refractory materials. , Welding of easily oxidized and heat-sensitive metal materials.
The gas heated by the arc is compressed when it passes through the water-cooled nozzle at high speed, thereby increasing the energy density and dissociation degree, thereby forming a plasma arc. Because of its stability, heat generation and temperature are higher than the general arc, so its melting capacity and welding speed are very large. The gas generating the plasma arc and the surrounding protective gas are usually pure argon. It is also possible to use helium, nitrogen, argon or a mixed gas of both according to the material characteristics of different workpieces.
Principle of micro-beam plasma welding machine
In the process of cutting metal and non-metal materials, plasma arc cutting technology is often used. This technology uses a high-speed, high-temperature and high-energy plasma stream to heat and melt the cutting material, and discharge the molten material through an internal or external high-speed air stream or water stream until the plasma stream passes through the back to form an incision.
Features of micro-beam plasma welding machine
1. Micro-beam plasma welding machine can weld foils and thin plates.
With a small hole effect, it can better realize the double-sided free forming of single-sided welding.
3. The plasma arc energy density is high, the arc column temperature is high, and the penetrating power is strong. The 10~12mm thick steel sheet is welded without grooves, which can be fully welded at one time. The welding speed is fast, the productivity is high, and the stress and deformation are small.
The equipment is more complicated, the gas consumption is large, the gap between the groups is large, and the cleaning requirements for the workpiece are strict, and it is only suitable for indoor welding.
Power supply of micro-beam plasma welding machine
The micro-beam plasma welding machine is generally used for welding with a direct current and a vertical power source. Through the special arrangement of welding torch and independent plasma shielding gas flow, unique working characteristics can be obtained. Ordinary TIG power supply can be added to the plasma console, or a special plasma system can be used. Using sine wave alternating current, the plasma arc is not easy to stabilize. In the arc, due to the large gap between the electrode and the workpiece, the plasma is compressed, and the plasma arc is difficult to work, and in the positive half cycle, the overheated electrode will round the contact tip, thereby affecting the stability of the arc. The editor of Duomu Industry recommends that you can use a dedicated DC switching power supply. Adjust the waveform balance, shorten the duration of the positive electrode of the electrode, so that the electrode is fully cooled, so as to maintain the shape of the tip contact tip and form a stable arc.
