Intro to Oxy-Acetylene Welding - Part 1

[Music] [Music] hi everyone today we're gonna do some oxy acetylene welding I'm gonna show you how to set up your regulator tanks how to safely use your torch and how to do some basic fusion welding with some flat bar this is just regular steel so first off setting up your tanks we've got two here we have an oxygen tank and we have an acetylene tank I have a little rhyme that I follow for all of these steps it's always going to be a before oh acetylene before oxygen or up you go don't ask me why but it's going to help you remember every single step so before I get started setting up my tanks I need to make sure that my torch and everything has been set up correctly we need to make sure that the tip is a tiny little hole here we need to make sure that the tip is clean it's hard to see need to make sure the tip is clean if you do need to clean it and you can tell once you actually start welding you can use a tip cleaner tip cleaners look something like this you need to pick the right size for the one that fits in that hole first we're gonna do the acetylene first we're gonna open up the main valve here half a turn so if this is my start I want it to get to here and I've drawn a little line here to help remember half a turn now the last person who used this did not purge the valves but usually when you get to it let me just purge that valve for a second really some pressure on my regulator there we go this is basically how much fuel is left in the cylinder and this is how much pressure will be coming through so in order for me to increase pressure that is going to be coming out of my torch I'm gonna have to adjust the regulator I'm gonna open up the knob on my torch handle for the acetylene or the fuel just opened up don't worry about how big it is yet and I'm going to adjust the regulator here I'm going in the plus you can see plus or minus I'm going plus and I'm going to increase it to about 6 psi there we go we're at three four five six if you look very closely there and you can hear the acetylene actually coming out go ahead and turn off your knob this one is set and ready to go next we have our oxygen tank we need to adjust this to we have between I'm gonna say 5 and 10 psi coming out of this we're gonna open this valve all the way until it stops we're gonna take our torch handle open up the oxygen adjust the regulator until we have between 8 and 10 psi it's hard to see the numbers but we just need that little valve needle to show it just a little bit right there that's good turn off your torch valve so if you look closely you can see that the needle on the left is just open a little bit and down on the acetylene it's around 6 that's a zoom in there a little bit you can see that the PSI is just about 6 if you look on the left dial you can see that there's a red zone do not push acetylene pass 15 psi next you need to have some sort of eye protection we're gonna be using a number 9 screen here this allows it to protect your eyes and your face from the heat mostly your eyes so that your eyes don't hurt while welding welding with just bare eyes is going to for a while you need to have a set of gloves ready we're using leather gloves here to protect from burns and I've got pliers here to pick up hot material after we've been welding if you pick up hot material with bare hands you're gonna get all blistery I'm going to set up my two pieces of flat bar here with a slight gap in between and I'm using fire brick to prevent my table from getting hot and fire bricks will not explode when heated or anything so now that I have my metal set up I have my torch all ready to go all I have to do is open my acetylene valve just a little bit or fuel valve this one's using acetylene open up just enough that you can feel it on your hands or you can put it up on your ear and actually listen I'm wearing these wicked glasses just enough to feel it take your striker hold it on a slight angle side here and you get a nice city flame all that black stuff is carbon we want to get rid of that or it makes a big mess I'm going to open up my acetylene valve until that black smoke goes away and I have a nice feathered flame delicious if you're doing thinner material you don't need as hot of a flame in this case we're doing eight inch flat bar so I'm gonna open that up so I get a nice roar I don't have a special number for this beautiful next we're going to open up our oxygen and add some oxygen to this mix watch carefully what happens to the flame now if you look at it it looks like we have two different cones here we've got a very bright one we have a longer one here don't try to get tough don't try to touch it but you can get pretty close without feeling any heat I'm not gonna purposely do that though all right I'm gonna adjust some more oxygen until that one cone gets nice and tiny so here's just I'd set the exposure on the camera down a little bit so you can see the two different cones when you first have just acetylene you've got that add your oxygen and you're gonna see two different color flames essentially coming out we've got a short bright one and a long one there I'm gonna add more oxygen until I have a very nice little cone that's maybe less than a centimeter long all right let's do some welding so I have my flat bar set up with a very slight gap in between I want to have a little bit of a gap to allow the metal to penetrate when it gets welded together I'm going to start by tacking both ends and then I'm gonna do a fusion weld it's attack first can get heated up and they'll hold my torch on about a 45 degree angle and kind of zigzag between the two pieces we'll concentrate on one area if this is taken too long you can increase the pressure and get more heat what we're looking for is both pieces of metal to basically turn molten you'll see it start to get shiny on both sides and then those two shiny parts will join together into one puddle back and forth let them join a row there we have a now a little puddle I'm gonna do the same thing to the other side I've dropped the exposure on the camera so you can get a better look at what's going on here so I'm holding my torch on about a 45 degree angle zigzagging back and forth between the two pieces I'll hold the torch on the other side so you can see better and I want to get a nice little puddle going back and forth between the two but I'm just hovering above the metal I don't want the torch to actually touch the metal there comes my puddle should join soon the two sides are getting molten and I want those two little puddles there to become one wait for that moment these little circles or zigzags there it is to see that now we have a nice little joint now that I got my two sides tacked I'm gonna practice lay in a fusion weld which is basically taking that puddle and pushing it down the length of my joint here whether you're left-handed or right-handed it doesn't matter you got to find a way that works for you I'm gonna go in this direction and push my puddle that way so I'm gonna heat it up get that puddle molten again I'm holding my torch on about a 45 degree angle if that thing heat it up then I'm gonna push the puddle if I stay in one place for too long once my puddle is going I risk to run the risk of actually burning through and burnin aiding my metal there we go keep your heat even on both parts of your metal or we go it's getting shiny I'm waiting for that puddle to join here it is I'm slowly gonna zigzag and push forward with my torch now this flame is extremely hot you're probably looking at over 3,000 degrees keep pushing that puddle all the way down the length of your metal ID zigzags but you could also do circle movements I think that's personal preference you can see that small molten puddle moving towards the end you don't have to do giant circles this is fairly thin material I just want to work it down to the end don't go faster than your puddle slow down and let it go once you're finished your weld turn off using the acetylene first a and then o you can take this to a bucket of water or to the shop sink to cool it down be careful of the steam when this goes don't put your face directly above normal in welding I'm not gonna cool it down in a sink I'm gonna let it cool naturally I don't want the weld to crack and become brittle but when we're just practicing I think it's okay once it's dried off you can shine it up with a brush we can take a closer look at our fusion well it's nice and flat I think this looks pretty good you flip it over when you flip it over you can see that the metal did not really penetrate too much through the gap there if you wanted to get more penetration you can put a little bit more space in between your metal

Channel: We Build Stuff

Views: 976,958

Keywords: welding, oxy-acetylene, adst, holbrook, we build stuff, seaquam, delta school district, shop class, shop teacher, diy, gas welding, mig, tig, oxygen, acetylene, safety

Id: fs1UhhJH0E8

Length: 11min 54sec (714 seconds)

Published: Fri Feb 15 2019