Energy storage welding grinding pressure

Can modified tungsten inert gas welding improve arc energy density?

Through collecting, sorting, and analysing the research data of tungsten inert gas (TIG) welding in China and abroad, the modified TIG welding and ways to realise the improvement of the arc energy density are summarised. Based on the existing literature, two methods have been employed to improve the arc energy density.

How to improve the energy density of TIG welding arc?

Based on this, many methods to improve the energy density of TIG welding arc are devised. These include activating flux TIG (A-TIG), twin-electrode TIG (T-TIG), keyhole TIG (K-TIG), high-frequency pulse TIG (H-TIG), ultrasonic-TIG hybrid arc (U-TIG), magnetic field control TIG (M-TIG), and hollow tungsten central negative pressure arc welding.

What are the conditions for K-TIG welding?

1. The necessary conditions for K-TIG welding are sufficient current and voltage as well as sufficient cooling of the torch. This ensures a high arc current density, makes the effect of electromagnetic contraction significant, and leads to the increase of arc energy.

What is tungsten inert gas welding?

Tungsten inert gas (TIG) welding has been applied frequently owing to its advantages such as good protection effect, stable arc, easy adjustment of heat input, less material splash, and nice welding appearance. However, its relatively shallow penetration and low efficiency limit its application.

How does K-TIG welding work?

During K-TIG welding, the temperature of the keyhole is higher and the thermal emission electron is easier. Therefore, the arc is compressed and attracted into the keyhole. The deep-penetration keyhole compresses the size of the arc and guides the arc to become a stable anode spot or cathode spot, which provides the conductive channel for the arc.

How arc welding works?

For arc welding, the production efficiency, weld formation, and quality control ultimately depend on the welding heat input that can be achieved by controlling the magnitude and distribution of the arc energy density. 1. The conventional activating fluxes include a metallic simple substance activator, oxide activator, and halide activator.