Welding Common Joints Using Flux Cored

hey everybody its Dan welcome to well fever on today's episode we're going to do some flex core welding of some common joint types so stick with me here we go [Music] okay so the first joint we're going to tackle is a lap joint and as you can see here it's basically one piece is overlapped on the other now something I want to call your attention to is the fact that this is all nice clean shiny metal this is what it looks like originally with a bunch of mill scale on it and I went ahead and took the grinding stone and just clean this all off and the reason for that is that the weld ends up coming out a lot better and a lot easier when you have clean shiny metal it doesn't have to try to penetrate through that tough mill scale layer so if you want me more successful weld if you want to have an easier time of it I strongly suggest that you take the mill scale off before you begin the material that we're using here is quarter of an inch thickness now we're going to be using the longevity MIG weld 140 to complete this flux core weld and we're using this machine in honor of the fact that our giveaway for the stick boat 140 is underway as we speak so anyhow on this particular machine using O 3:5 wire which is what I have in there the maximum thickness on a single pass is 3/16 of an inch well as you realize this is this material here is about a sixteenth to large and ideally when you lay in a weld here this type of a lap joint you want it to join from the very top to the bottom so since we're a little bit shy we're probably not going to get there however I'm going to see if I can manipulate the torch up and down a little bit to get that quarter-inch Filat weld all the way across I think that would be preferable to either having it come short or worst-case-scenario trying to do it in two passes I think that would not be good either so I'm gonna go ahead and give it a shot okay before I get to welding I want to come in here and show the actual and what we're gonna do first of all notice that the stick out on here is somewhere between a half inch and three-quarters of an inch that's the manufacturer recommendation for this particular type of flux core it's definitely a lot longer than you would do for mig welding and it seems to work better when you have it out this far what I'm gonna be doing is because this produces slag I have to drag it so I cannot push it I have to start from here and I have to drag in a backhand angle backward angle I should say I'm going to aim primarily for where the two pieces join right in the corner there and because I'm gonna have to try to swing this up a little higher I'm probably gonna do like a circular motion or an up-and-down and watching my puddle until my puddle just nips the top and then come down so that hopefully when all is said and done I'll have a nice 45 degree angle fill it weld from one site to the other the first thing I'm gonna do is I'm going to tack it on both ends so let's go ahead and get that done we're gonna begin with tagging this up as I just mentioned very simple procedure just get it right in the corner there and give it a little shot enough to where it basically fuses a little bit enough to hold it in place but not too much we don't have to get excessive with a tack weld notice I purposely left this part of it in here I'm cleaning off the tack wells with the grinding wheel of course you could use a chipping hammer or a regular hand brush or whatever but I wanted to point out that when you have something that produces slag you must clean your tacks or previous welds before you actually start welding over it you do not want to trap slag in between there very important point okay so now I am beginning the weld and like I mentioned earlier you can see I'm definitely going up and down here up and down I'm watching the puddle as carefully as I possibly can admittedly if I could I would have a little bit more amperage into this but we are using a 1:40 machine so we are limited by the amount of amps that we can put into this just based on the power available at this point in the process I had stop because my wire got stuck in the machine I had to go in there and adjust it because everything was kind of you know tied up in there and you're gonna notice that the termination in the weld when we show it there's a couple of voids at the bottom looks like cold laughs like there wasn't enough penetration or I should say fusion at the bottom there but what it was is that the wire was binding up just prior to it completely sticking and as a result there was some voids because it just wasn't feeding properly anyway I cleaned it out a lot prior to restarting I started up ahead of the weld and came back into the previous termination to try it tie it in well there you can see the voids that were left as a result of that wire binding up on me again it looks like it might have been some kind of cold lap or some kind of a you know problem with heat but no not in this case hey it happens from time to time it's just kind of the brakes and you got to deal with it okay so now for the next one we're gonna do a tea join the tea joint is a very common joint it's used all the time in welding there's really no trick to it the only thing you have to understand is that when you do this well both sides of the weld have to be equal distance so in other words here at the very center from here to here and from here to up here what all right this is what I was basically trying to explain although I don't know what got into me so bottom line is where the weld meets the base material is the toe and the root is the center portion where the two pieces of material meet from root to toe equals a leg I hope that explains it this particular piece is a quarter of an inch so our goal is to try to get it as close to a quarter of an inch as possible so that means the distance from the corner or the inside edge here inside corner to down here at the bottom should be a quarter of an inch and also likewise the distance between the where the two edges meet up to the top should also be a quarter of an inch thus making a nice fill it well that's in an exact 45 degree angle from top to like so the way to achieve this is to make sure that you hit both sides equally in this case I'm gonna probably do a side to side up the up and down motion as I go across I want to make sure that I take my time and that I angle in here 45 degrees into it and also about a 10 to 15 degree angle back now I'm gonna be a little bit steeper than that because I'm trying to keep this gun out of the way so that you folks at home can see this otherwise if I keep the angle like this you won't see anything so my angle is much steeper for the purpose of filming this but keep in mind your angle should be about here's 90 about 10 to 15 degrees back like so okay so let's go ahead and get this welded well go ahead and begin here by starting up on the right edge and we're gonna go ahead and just go for it you notice I do have some tacks on this that I applied before filming and they're actually on the sides of the piece but I just didn't choose to show that this time around anyhow like before we're gonna go up and down and an up and down motion and as I looked at this I noticed that I was going a little bit slower than I did for the lap joint which actually was good the lap joint I think I rushed a little bit if you don't have the amperage to give you the punch you do need to slow down a little bit to try to get a little more heat into the piece however not so much that you have excessive buildup of weld material so again lies as always it's a delicate dance between too much and too little but after a little bit of doing this a little experience and you'll figure it out anyhow there we go we are clean off the weld the slag has come off very easily which is always a good sign and upon cleaning this guy up a little further you notice we have a nice bright shiny weld with a decent ripple pattern and it appears once we see it here that everything looks pretty good good fusion all the way across and pretty even weld and just like that we're finished with another episode thanks so much for joining me on this one don't forget our contest our giveaway is under way visit WWF every calm backslash giveaway to enter and make sure to catch us every Wednesday and well fever Wednesday also catch us on Twitter and Instagram bye bye [Music] you you

Channel: WeldFever

Views: 1,230,974

Keywords: mig welding, mig weld, how to mig weld, what is mig welding, mig welder, how to weld, mig welding machine, welding types, welding how to, how to weld with mig, gmaw, welding machines, lincoln welding machine, miller welding, weld, welding, welder, welding supply, welding supplies, mig, tig welder, miller welders, lincoln electric, arc welding, welding practice, flux cored, flux core

Id: L737AuJF7zs

Length: 9min 40sec (580 seconds)

Published: Wed Mar 25 2015