Guys, all the greetings. When I picked up derzhak and began to make his first welds. But miracles do not happen, and they receive not the way you want. And that's fine, just nothing good can happen - for all necessary training and experience. Nevertheless, you can speed your way to good quality, if you know exactly what you're doing wrong. And now we analyze the main mistakes beginners to welding on the example of the welds.
He came to work for him, and dug in his pile of scrap and ferrous metal piece band, 3 mm thick (not as much) that this band to impose several stitches for example.
Here are my different piece of iron reserves, there are plenty to choose from! Sometimes it all sorted out, and only the most revealing rotten rent in ferrous metal, everything else is up to the small pieces I leave, because in all this can come in handy.
Raschertil strip into 7 equal portions and put 7 different quality welds. Every seam numbered chalk, putting numbers in order from the left seam. Welding electrodes produced ANO - 21 mm of thickness without vibrational movements in opposite polarity (as indicated on the package). Welding angle back.
So let's start to disassemble the seams and look where we made some mistakes.
Seam number 1 - it is a normal joint. It is made at the correct current, the normal angle of inclination of the electrode, the arc length is correct and uniform speed of movement of the electrode .Imeet uniform height and width.
Seam number 2 was placed on the lack of current, and so it has turned narrow and high. It was well enough energy to melt a weld pool of normal width, and therefore the metal thus superimposed.
Seam number 3 was made at too high current. We see that it is quite blurred in width, it has a low height, and begins the base metal is melted.
Seam No. 4 was made too fast reference electrode. So he turned narrow and not very uniform in width.
Seam number 5 on the other hand is made at too low speed reference electrode. So it gets wide, strongly rasteksheysya around, and in the end the main metal can be overheated and melted the what actually happened.
Suture Number 6 was made because - often and abruptly changed the angle of inclination of the electrode, and the electrode is deviated to the side from a straight line along the axis direction of the seam.
Seam number 7 - a seam made too long arc. Here we see a huge scaly, non-uniformity in height and width, as well as a huge amount of spatter next to the seam.
Let's look again at the seams, but taken from a different angle.
amperage welding seams I did not point out, as all the welding machines are individual. So choose the optimal amperage needed on a particular machine on the fact.
So how to fix these joints, so that later they became better? Knowing the root cause of the error, just do the opposite - to add or subtract current, electrode lead quickly or slowly, and so on. But most importantly, more practice and experiment, and then your welds are getting better and better.