Welding consumable electrode is the most common method of arc welding because of the simplicity of the process. At the same time in orbital welding, this process is the least manageable in terms of stability penetration of metal at the root of the weld and splashing in the formation of surfacing passes because of the need to change the position of the burner. Svyazanoeto with the fact that the opportunities for regulation of separate receipt of electrode metal into the molten pool and regulation of the energy characteristics of the arc on the melting of the base metal is extremely limited. Found that the most significant factor in management energy characteristics of the arc for the guaranteed kapleperenosa is about touching a drop of bath surface, which is characteristic of the welding process with a short circuit (SC), a drop of the arc gap. This process is managed kapleperenosa (PPC) involves three stages: reduction (off) current at the time of touching a drop of bath surface; supply current pulse after a certain time after contact and an increase in current after bridge the gap. The stability of the process (every drop goes in the bath at the first touch) primarily affects the contact area of the drop with the surface of the bath.
For a small contact area of the force of the pinch effect (if current moment of contact) is faster than the growing strength of the surface energy (surface tension) – one of the major forces in the process of absorption droplets weld pool. Increased surface tension forces promotes the separation of droplets of electrode metal, but it prevents the absorption of the weld pool. Therefore, surface tension forces during welding with controlled heat and mass can change during the welding process with short circuit. It was established experimentally that the mensheobem drops, the less time is necessary for narrowing the drop to the optimal size to form a jumper wire t zone – drop. If there are current at the moment Touch the time restriction increases, so the start time impulse current (or time delay impulse since touching a drop of bath surface) should be set depending on the volume of each drop electrode metal.