Oxy Fuel Brazing: Heat Manipulation Exercise

hey welcome to will.com home of TIG time hi I'm Mr TIG and we're on site here Cali County College I've got Bob Moffett with me he's done several programs with us before he's the head instructor normally we're welding pipe and some pretty heavy structures and things like that today we want to show you kind of the artistic side of uh what you can learn here at this college so Bob thanks for joining us thank you good to have you well hey what is this it's just got cool Factor it looks good pile of brass it kind of looks like a tree doesn't it it does yes I learned this from a from an old metallurgist that worked for mg mesum company in in Wisconsin uh a lot of us salespersons went up and we had to learn their products and everything one of the exercises that this guy was was uh showing was their low fuming bronz or brass Alloys um the exercise I think is just vital when it comes to oxy aylene welding TIG welding uh you're manipulating a heat source and a filler wire so in doing so why don't we challenge ourselves to do something here so the trick is you clean off a piece of of carbon steel or any material that you can start out with but it needs to be clean uh and you start melting some brass and you can make your trunk and the what's what's cool about this is you have your heat source and you have your filler wire and there's a there's a liquid and there's a solid a liquid and a solid and it's a movement of an eighth of an inch and if you're good with your filler wire you can actually stretch this stuff out and you can make you'll notice you'll notice that some of these are thin and there's bumps to them and that's that's us moving and stretching and making this freeze and stuff out here in space so you know the last thing you want to do is like the lay wire technique you don't want to just stick it on there and then melt it off up here that's cheating you're not going to do the exercise uh so we want to get this melted right out here on the very tip and we want to fuse it and we want to pull it and stretch it and we want to go different directions so I find it to be a a really valuable experience as far as learning how to manipulate things you know when I started welding I started doing oxyacetylene oxy acetylene only you know it it it looks like uh you've got what a number it's a it's a double lot tip double lot tip small yeah I mean we're not we don't need to run a bunch of heat into this again you know our our area of concentration is right on the edge of the flame the very tip of the flame so we don't need we don't need anything big you know this is a number two and I would think that's way too big okay so now do you do you run a neutral Flame neutral flame okay yeah that's kind of fun to do all right uh I challenged the student to long time ago when I first started teaching here I I challenged him to do this I know I have some sorry I know I have some smoke coming off of this don't mean to but I don't want to turn my flame down from there I challenged a student to do this and real difficult for him for some reason he was just making brass bbb's and they'd land on the table and roll away and he was very frustrated for about a week and he continued to stay with it and I went and checked on him one evening and I could tell he was mad at me cuz he didn't even want to he didn't even want to speak to me and I came back a little bit later and asked him how everything was going and he had a a cabin a tree a rock wall ball and a swing set made now how he took a piece of 332 filler wire and got this thing down into the thickness of a piano wire I don't know I even asked him I said how did you do that and he said I'm not going to tell you you know here's another challenge here I'm I've got all these branches here and I need to I need to fix this one here that's coming off here I can't I can't just stick my torch in here I've got to manipulate the edge of my flame barely melting the tip of this I say I am there we go okay so I I noticed that your your brass has a flux coating on it is is that what you prefer preer that's what I prefer for doing this exercise uh there's a lot of things that we repair that we'll use a a be brass in a separate flux like a Peterson's or or um maybe even depend it depends on what we're repairing there's some cast iron that good old 20 mu Team Borax works pretty good so you can kind of tell how we're stretching this out right here at the very end this takes some time but again you know let's let's do one right out here and I'll go horizontal I want to melt the very tip of this fuse those and then move my torch away and in doing so I can actually stretch this brass out just by using the very edge of the flame why have you ever sat down to make a TIG weld you just weren't in the right [Music] mood you just weren't in the right mood you're a little nervous about something yeah usually a lot of distractions usually right around tax season yeah yeah I hear you uh kind of got to be in the right mood for this not something you're going to force happen you got to you got to relax and manipulate things here okay so I came off of here I came out went down came back up that looks great it's kind of fun to do and you know when you get done uh a good test you can can drop it if everything's used together it stay together pretty robust well this tends to have this clear glass on it we take a pair of pliers and knock it off and put it in our blast cabinet and bead blast it and clear coat it we need to come in and repaint this and make it you know I I just I just think it's a good exercise okay well let me let me recap it you're using oxygen and ayine M and you're you're taking this to a a double a tip neutral flame and then the rest of it's your creative heat and dab and and whatever it takes to make this thing work yeah this this is a flux coated brass mhm and do you know what the melting temperature of it is just by chance 1,000° I I I can imagine and because you're moving in and out different distances it it's melting and resolidifying and you're you're doing all kinds of cool things with it but uh one of you know I think one one of the few schools and I had this question asked to me recently on a on a National Committee was nobody teaches oxy acetylene anymore nobody teaches oxyacetylene welding we do i' I've never taken that class off the book simply because it goes hand inand with TIG welding mhm um so we're doing oxy ettling welds where we're melting the the parent metal of carbon steel uh we do brazing and silver soldering silver soldering to me is amazing in that uh 70,000 lb tinel strength 70,000 lb off something that melts about 8 900° yeah that's amazing it's crazy uh very expensive so did did you tell me you still do have the gas welding in your curriculum mhm yeah and and do the students now I'm not saying this happened to me but do students still get the puddle going and then pop and the guy next to them is a little bit concerned oh yeah oh yeah okay so that we still going to have a little backlash a little backfire Le I I learned the gas weld first and foremost and of course I went through that and after a while you get used to it but gas welding absolutely gave me the way into TIG Welling so uh I'm glad you've kept it in the curriculum sure it's good stuff I I I think it's very valuable you know we we make repairs on obscure things uh people bring in something Irreplaceable and one of the only ways to fix it is with brazing or with oxyacetylene welding or something uh case in point we have we have beveling machines that we bevel our pipe with they're cast aluminum the handle is cast past aluminum and it's on a pretty heavy spring to to grab onto the pipe and somebody flipped it Loose one day and just let it fly open and it broke the broke the handle well what's the first thing you want to try to repair aluminum with TIG welding TIG welding sure and You' think of course you know that'll work it didn't work I you know aluminum cast aluminum is alloyed with a bunch of different stuff and some of it just absolutely doesn't want to be welded on period And so you you got everything cleaned up you get it set and you strike an arc and it just and you're going wow what is that that's not going to work and so what are your options and we exhausted that one day and and the last thing we picked up was was brass and this thing is just it just like it just flew right into it and it's going wow that wow that was cool and it's still in service today that was like 17 years ago and it's still in service today it was the repair it was strong it's durable uh and it's the only way that that material wanted to be stuck together so well Bob thank you so much for showing this to us and thank you for watching TIG time I'm Mr Tig to stay up with the latest TIG Welling technology and education subscribe by clicking the button below

Channel: Weld.com

Views: 48,238

Keywords: TIG Welding, Welding, GTAW, Mr TIG, TIG Time, Weld.com, Welding Videos, How to Weld, Welding Tips and Tricks, TIG Welding Videos, Everlast Welders, Miller Diversion 180, Miller Welds, Longevity Welders, AHP Weld, 200X, 200DV, Oxy Acetylene welding, gas welding, heat manipulation, welding practice, heat manipulation excercise, cowley college, bob moffatt

Id: cZNDpi3LR_E

Length: 11min 31sec (691 seconds)

Published: Fri Mar 25 2016