Friends, I welcome everyone to the channel for self-taught beginners in welding and locksmiths. At home, in the country, most of the welded structures will be made of a shaped pipe. When welding, beginners often burn through it. I'll show you a little trick on how to simply reduce the likelihood of burns.
Today at work I welded frames from a 40 x 40 mm profile pipe, 1.5 mm thick. This frame is a blank for a homemade sideboard for a cargo trailer.
2 crossbars are welded inside the rectangular frame. I have already cut off one and laid it out according to the required markings. But with the second I will show you this little trick, which I spoke about at the beginning.
We will measure the exact size of the workpiece we need. Exactly in millimeters, as in that advertisement, exactly how much you should hang in grams! We get the number 590 mm. But we will cut the workpiece 2mm more - 592mm. Why do this, see below.
A workpiece was cut with a length of 592 mm. The burn-through of the pipe itself in such joints occurs just along the edges, along the ends of the pipe. Now, if this butt, the butt itself, was a little thicker, then beginners would not have burned through. So we're going to make those edges a little thicker!
There is such a concept - to stamp the ends. We take a hammer and tap our ends of the workpiece from the profile pipe. At this point, the metal becomes denser and thicker. Naturally, the length of the workpiece decreases slightly.
The most optimal thing is to make the workpiece a couple of millimeters longer and then stamp the edges. Edges instead of 1.5 become 2.5 mm thick. This thickness will be much easier to weld without burn-throughs.
Everything, after fine machining with a hammer, the workpiece sits tightly into place! The size of her becomes what you need.
In order not to strain on the hang, when chasing, we support the butt in some metal part, in this example it was a piece of a channel.
This is what the end of the pipe looks like after chasing with a hammer. It is very noticeable that the thickness has become much larger than the original 1.5 mm.
This is not a guide to action - do it that way, no, this is one of the old tricks that our grandfathers still used. Who did not know, let them replenish their technical arsenal of knowledge, it may come in handy someday.