Hello! Without welding in our lives can not do. Metal products are all around us. From big shopping centers to a modest year-old soul in the country - all made of metal. More and more people buy for themselves everyday welding machines (today they have become quite compact and available), and taking the first steps in such an interesting lesson as metal welding. You are a novice, bought a welding inverter, a mask (preferably chameleon), low-cost electrodes (preferably rutile cover - MP3, ANO - 21, monolith) and start trying to light the electrode and the first to do in my life welding seams. Here it is important to understand how to distinguish between metal and slag, when our arc lights, because if do not understand and do not see this process, the normal welding does not work, and we will be sad and dull .
So, let's begin. We took a test piece of iron which will learn derzhak pasted electrode (most Appliance optimal welding electrodes will be 3 mm) and light the electrode. Kindle only a scratching, like a match strike sharply toward the direction of the future seam. The electrode is fired up, the process went, back to the beginning of the welding location and start to do the so-called weld puddle by directing the arc on chemin de fer and slightly leading tip of the electrode, making the small oscillating movements to the right and left at the same leisurely moving toward Future joint. Almost forgot - when lit electrode and it normally inflamed, making the gap between the electrode tip and the weld pool of approximately 3 mm (with time and practice, it will come), and gradually we will omit the electrode lower and lower - because it burns, and the gap is better to keep the same (this skill also comes with practice).
This photo crater of the volcano is similar to the weld pool! Electrode cant through an angle between 90 and 45 - with time will choose an optimal. Thus, the weld pool we formed and where is the slag, and wherein the metal? Where do we look? Immediately beneath the electrode tip is formed a strong and bright light.
Just this bright light look, we do not have to - it dazzles and stronger monitoring and will not give us anything. Look needs a little out of the bright light - Tav you and zametete weld pool border, if the current and the welding speed picked up normally, this limit will be well visible.
So, if we get to see the contours of the weld pool border, congratulations - you can see the formation of the weld, ie Within this border, we see metal and abroad will slag (fun to come up with about abroad, but it is applied to the welding arc! ). Slag is darker in color than metal. If you are constantly normal to see and distinguish the boundaries of the weld pool circuit, the seam forming process will be properly and without jambs! Hopefully a little opened the question asked by almost all new to welding.