Ignition of the arc

Ignition of the arc

The welding arc is ignited by direct contact of the electrode with the workpiece. Due to a short circuit a high current density is created in the contact area. By this means, the melting phase and the metal vapour is formed, by which the ionisation can start quickly. The arc increases as soon as a [...]

Welding arc - properties, forming

Welding arc – properties, forming

Many important joining processes make use of the arc as a tool and energy source. The arc performs the penetrations and deposits the filler. Furthermore it supplies energy for physical and metallurgical processes which are important for welding. As glow discharge or real or artificial flash also the arc is a special kind of gas [...]