Greetings to all subscribers. Today will be an important topic for the very beginners to use welding. Why do electrodes stick when welding?
Let's start with the most important reason - a lack of welding current. There is not enough energy to melt the metal stably and get a weld pool, so the tip of the electrode just welded with metal, according to science, as we were told at the school, this is called an electrode freezes!
But there is still sticking at the very first moment of ignition of the electrode, it's just that the metal is still cold, and it takes time for it to warm up for the normal welding process to start. Strike the electrode, it lights up, and at this moment you need to lengthen the welding arc for a fraction of a second, and then reduce the arc length to a minimum. This action will help you not immediately stick.
Rusty and dirty surface of the workpieces being welded - a grinder and a metal brush will help.
On the electrode, the coating flew off in places, it is especially difficult if the tip of the electrode is exposed, it is better to fuse these places before coating on a long arc on another piece of iron that is not needed.
A weak voltage in the network or a small cross-section of wires, if you connect the device to an extension cord, will help a little if you take electrodes of a smaller diameter.
There is still such a moment, if you cut metal with an electrode, then first you need to melt the point well, and then shorten the welding arc so that it blows out this molten metal. If it is not good to initially warm up, not to melt the metal, then when the arc decreases, the electrode can also stick.
Another important point, if anyone else uses AC welding machines, then electrodes with a basic coating will not weld, but will constantly stick. These are the electrodes uoni, lb 52 y, mtg, they are designed for direct current welding.
Well, and a little welding experience, the more you weld, but it is advisable to study more theory in parallel, the less difficulties and sticking will be. Train more, even just like that, when you don't need to weld something, this will accelerate your good results.