Friends, I welcome everyone to our channel for self-taught welding and locksmiths. And also just for those who like to work with metal. Each of our articles or videos is a hint for a beginner in simple words so that he can immediately apply it.
This article for beginners will explain and show in the pictures the direction of movement of the electrode when welding. Let's start from afar, see the following photos.
Before welding, we take the grip with the electrode and slightly tilt the grip handle downward. It is so easy to hold and easy to weld. The electrode in this position forms an acute angle from the vertical. Nobody welds at 90 degrees, strictly vertically.
In this position of the electrode and the holder, there are 2 directions of movement when welding. This is welding from oneself or welding to oneself. It seems to be understandable, but it should not be called that and it is not correct.
Correctly say welding with an angle forward or welding with an angle back. Remember I said that the electrode forms an acute angle from the vertical position. That is why this expression is used in welding. See the next photo, so you will remember it forever.
Friends, this is forward angle welding. We light the electrode and start welding the metal. The direction of movement from the place of ignition is as if from yourself, forward. You can even say that the grip moves after the electrode. But it will be the other way around.
This is how we will cook with a backward angle. We light the electrode and, as it were, pull it towards ourselves. Here it turns out that the electrode moves after the holder. So, well, what is the difference here, how can a beginner cook correctly, an angle forward or an angle back?
Under conditions known to be equal, I mean the thickness of the electrode, the welding current and the speed of movement will be as in the picture.
More precisely, with an angle forward, the penetration depth is less, but the seam will be wider.
With a backward angle, the opposite is true - the penetration depth is greater, the seam width is narrower.
Well, how is it better then? Welders in 90 percent weld exactly the angle back. So the welding process is better visible - the formation of the pool. The arc pressure will throw the slag back, preventing it from flowing into the bath - the likelihood of slagging is less.
You can weld thin metals with an angle forward; deep penetration is not needed here, even the opposite is desirable. But it is so desirable to butt weld metal. If it is a fillet weld, the slag will flow in front of the weld during welding. Corner seams - corner back.
Although most welders with thin metals prefer to weld with a backward angle. Personally, I can cook a thin professional pipe with an angle forward if it is a butt seam and the gap is a little too big-angle forward with a separation, such a gap quickly melts without an additive from the rod of another electrode.
Friends, all these welding methods are relevant for the lower and horizontal position. If you have to weld a vertical seam, then everything will be the other way around.
The vertical is welded with an electrode from bottom to top, it turns out a movement with an angle forward. It's easier, better penetration. Both thick and thin metals are boiled.
But thin metals, in particular a professional pipe, can be welded from top to bottom. But here they lead the electrode without tearing it off - you need experience and skill to cook this way, it is better for a beginner to postpone it. It turns out this is welding with a backward angle.
These are the welding laws. If you hear welding from yourself or welding to yourself, now you know what it means, we cook with a forward angle or a backward angle.