Proper tecnique for welding outside miter joints?

[KMinAF]

On my latest project I have several miter joints that will need to be welded and finished smooth. Up to now I have "stitched" the outside of the joint then run a bead on the inside. Is there a better or different way to do this?

 

[Ohmthis]

Wnat I like to do if I'm finishing the edge, is to leave a gap about a 1/16 or so. It lets you get full penetration and then when you finish the edge you are not grinding all of your weld off.

 

[gerahead]

. . . or bevel the edges to be dressed prior to welding. You'll get good penetration with plenty of flexibility to dress the welds to your liking. L8r

 

[vintagespeed1956]

weld the inside first, and then the outside. keep the heat down & grind.

outside edge of a true miter is razor thin.

edit:

you can also try not doing a miter at all. cut & bend the corner.

 

[kazlx]

If you cut your material to length minus 2 times the wall thickness, you can 45 the ends and have a nice open fillet joint.

 

[OccupantRJ]

If you cut your material to length minus 2 times the wall thickness, you can 45 the ends and have a nice open fillet joint.

This is also the way I do it. Makes for a nice, rounded outside corner. All my hardware filing cabinet dollies are done this way.

 

[kazlx]

This is also the way I do it. Makes for a nice, rounded outside corner. All my hardware filing cabinet dollies are done this way.

Yes. If you need a sharp corner you need to adjust a little. But this works very well for blending. A little work with a flap and it looks great. I also bevel the top and bottom so the weld has some room to lay down, usually 14g or thicker. The thinner stuff there's usually no room, you're better off with a tight 45 all the way around.