Article and advice for self-taught beginners in welding.
In any unfamiliar business, there are many pitfalls, and here you have to learn either from your mistakes, or immediately take a lot of interest and study the activity that interests you. Today I will tell you an important topic - welding with an angle forward, or an angle backward, which is the best and correct way.
The electrode inserted into the welding arm is similar in shape to a square. This analogy is very easy to remember for ease of assimilation of further material. We take a holder in our hands, we mean that we take a square, an angle.
This method of welding, in which we lead the electrode, as it were, away from ourselves, ignited the arc and move forward from this place. It's like watering the beds in the area with a watering can - go ahead and water. This welding method is called forward angle welding.
If we do everything the other way around, ignite the arc and, as it were, pull the electrode towards ourselves, back from the beginning of the welding place. This method will be called backward angle welding. Next, let's look at what is the difference and how it will be better to weld metal.
The electrode burns, the welding arc melts the metal and pours more metal into the weld pool, this is how a weld seam is formed, after cooling it connects the parts.
When welding a product with an angle forward, a smaller depth of penetration of the metal and a wider weld seam are obtained. But here the slag can flow ahead of the arc and interfere with the normal welding process.
If you weld with a backward angle, then everything turns out the other way around - the depth of penetration of the metal is greater and the width of the weld is smaller. The welding slag is thrown back by arc pressure if the welding current is set correctly.
Thick metal is welded with a backward angle, except for vertical seams, here the welding goes from bottom to top with an angle forward.
A thin metal is welded with an angle forward, for example, structures from shaped pipes. But even then, if there is a connection with a gap, then it is easier and faster to weld with an angle forward, there is less chance of burns. But if the connection is without a gap or with a minimum gap, then you can cook it with a backward angle.
Here is a photo of yesterday's work - I replaced the sheet metal on the front side of the Kamaz trailer. Fillet welds are made with a backward angle, otherwise there will be slagging and lack of penetration. Vertical-angle forward from bottom to top.
It is possible to weld thin metal in a vertical position with a backward-welding angle from top to bottom, but this is a topic for a separate article, it will definitely be.
Friends, I hope I clarified this issue for beginner self-taught a little and showed it on real welding examples. Subscribe, see you soon!