Greetings to all self-taught beginners in welding and lovers of working with metal!
Let's talk today about the welded joint of a profile pipe at 90 degrees - after all, almost all structures are cooked in this way in everyday life - the frames of gates, fences, gates, sides of trailers for cars and much more.
We have 2 options for joining a profile pipe. You can weld the joint at a right angle by cutting off the pipe end at 90 degrees, or you can saw the pipe joints at 45 degrees. Even visually, the joint with gash at 45 degrees looks much more impressive. You think it takes much longer to work with him, no, I’ll tell you why such a joint is more profitable in time.
If we make a welded joint from pipes with ends at 90 degrees, then we will have an unstuffed end. And if this is a frame of any design that will be visible, then you will have to jam this end.
This is a lot of extra work and extra material. The material is needed for the plugs themselves. Then the welding of these plugs will go. For example, take a profile pipe 60 by 40, in order to completely weld the plug, we need to make a 20 cm seam, which then needs to be cleaned. But any frame has 4 corners, which means we already have 80 cm of a seam with a stripping!
Of course, I washed down at 45 degrees a little longer than the butt at 90. But this is only a few centimeters, compared to the amount of work on welding the plugs, this is a drop in the ocean.
The only moments when you can neglect the plug and weld the connection without cuts under 45 degrees, this is when the frame is inside the structure - for example, garage door leaves, or a frame metal door. There is no particular sense in jamming the ends here, and the assembly itself in place will be easier with blanks whose ends are at 90 degrees.
In all other cases, it is much better to file profile pipes at 45 degrees and make just such welded joints. It will turn out much stronger, more beautiful, and more profitable in time.
For example, a short video where I welded a collapsible fence.