Why are the gaps in the welding metal

  • Dec 25, 2019
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Hi guys. We continue to provide useful advice to the beginning welders. I want to touch on an important topic, but why do we need gaps in the welding of metal? And whether they are necessary at all? Of course they are needed, not to get the connection strength a little more, if you have affixed a piece of iron with several layers of blue electrical tape! All welding textbooks, and it is desirable to read this if you plan to do even at the household level, about the gaps in welding describes in some detail with numerous illustrations and special tables.

Yandex pictures
Yandex pictures

This information is desirable to know, and even more so to use, if you do the welding work. And the thicker the base metal, the more work we need to do before the main welding - not only to expose the desired gap, but also to make bevels welded edges (grind grinder). Consider the welding process itself with a gap and the parts without a gap. In the presence of the gap welding with deep penetration is obtained and such a compound will have the desired strength. But if desired remove the gap, then we get a very shallow penetration to such a compound, and its strength, respectively, will be insufficient for the product. What would make the analogy of this process, let's brickwork.

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Yandex pictures
Yandex pictures

We see that the solution penetrates into all the gaps between the bricks, and when it solidifies, then we get a solid wall. But if you remove all the gaps, the solution can be applied only to the front surface and will only plaster brick stack, the strength of the wall you represent. All the same will and welding. So do not neglect these simple but very important rules welding .Predlagayu look with an interesting video experiment where welder tests the two welded parts, one of which was welded with a gap, and the second without gap. Video YouTube Channel Urban ART FILM.

Finally I will say that I personally love to expose gaps pieces of debris from the Bulgarian community - precisely know the gap in mm, and quite easy to remove these pieces after the tack, but if you go with metal pieces, cinder electrodes, after tack parts can be quite problematic their delete. Cook, fill his hand, it's worth it!

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