Friends all welcome. The holes in the metal, as a rule, we do a drill-drill, but sometimes we need a large diameter, for which our living conditions do not we just pick up the drill. And here to help us, our manual arc welding can come.
When welding in a garage on the site, the country is sometimes necessary to resort to this method, make a smooth hole in the metal. Today I want to show you one way to do it.
For example, consider scrap shaped tube 40 at 60, 2 mm thick, and the sleeve 25 from the tube. Our challenge will be that the sleeve must be welded into the pipe, slightly sliding it inside. And for this it is necessary to cut a hole smooth welding to weld gaps were minimal.
I take the blue indelible pencil on the metal sleeve and gently lead round about this area inside the circle we have to cut welded.
Then take a piece of chalk, and as accurately as possible encircle our circle, made in blue pencil. Many people at this stage are beginning to cut a hole, focusing on the chalk-may be so, but there is a good chance to go beyond the contours of the circle, and then welding will be long and complex. See what you can do next.
We take and make the welding seam around the circle, focusing on his chalk-welding can be clearly seen. Boil two semicircles leading electrode angle back and trying to weld the inner edge of the barely touched our circle of chalk.
That did seam around our circle, we now have a benchmark naiotlichneyshy to cut smooth opening under the sleeve. Now we cut the metal electrode, leading him along the inner edge of the weld. Cutting the best angle and forth so it is easier to control and see the process.
After the metal is cut, we try grommet and trimmed seats that prevent the sleeve to go deep-usually such places are, but it is much better than the brew is too big a gap. Oh, I almost forgot, before you start to cut metal better grab something to cut out a circle caskets to this circle is not subsequently failed inside, everything is the same, and in some cases it can be undesirable.
We insert the plug into the hole and see that the minimum clearance. In addition, we have one bonus- seam around the hub is already there, and to weld it will be easier and faster if it did not seam.
We clean slag and metal brush set tack, and of course produce final welding.
That's all, everything went according to plan, as we intended.