|
|
While I realize that we've covered much of this in another thread (see http://weldingweb.com/vbb/showthread.php?t=62703) and I'm sure this subject has been covered before. However I quick search didn't bring it up. I thought I'd start another thread with a simple title that might be easier to find. I also decided to try my hand at movies one more time to see if it might help some of the beginners. I don't even know if the last ones I did where even seen being buried in the other thread. Anyway on with the show. I hope these are a help to somebody. Maybe this well embed this time. I've got some more video's uploading right now so we'll try it again if it doesn'tLast edited by Robb M.; 01-10-2014 at 12:15 PM.Millermatic 252XMT 304'sDynasty 280DXHypertherm PowerMax 1250Miller Trailblazer 302 EFIOptima PulserXR feeder and XR Edge gun and more athttp://members.dslextreme.com/users/waynecook/index.htm
Reply:Thanks Irish Fixit. Your video just showed that I wasn't adjusting my torch properly. I just started getting back into using my O/A outfit, first job was cutting up some dozer tracks. I had a lot of slag and some welding back together behind the tip, just an ugly mess. I had O at 20 and A at 5, I also didn't adjust the flame with the oxygen trigger on.Thanks for info, Tom
Reply:You're welcome. I don't pay to much attention to the acetylene pressure other than keeping it under 15. I know I was running around 7 this time around but I often run higher since I use large rose buds fairly often. Here's the next. I have two more after this that are still uploading. I'm going to try and add to this as I have time.Millermatic 252XMT 304'sDynasty 280DXHypertherm PowerMax 1250Miller Trailblazer 302 EFIOptima PulserXR feeder and XR Edge gun and more athttp://members.dslextreme.com/users/waynecook/index.htm
Reply:Very good, Wayne!! There's been a lot of attention paid to joining iron here, but very little to cutting it. I'm sure a lot of folks here will appreciate your efforts. If you feel up to it maybe a little video on plasma cutting would also help some folks here. Again, Thanks, MikeOl' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:Thanks. I'll see about getting the plasma sometime as well. Cutting does seem to be a subject that's overlooked here. Yet it can be as important as the welds. Here's the next video. I have one more uploading at the moment.Millermatic 252XMT 304'sDynasty 280DXHypertherm PowerMax 1250Miller Trailblazer 302 EFIOptima PulserXR feeder and XR Edge gun and more athttp://members.dslextreme.com/users/waynecook/index.htm
Reply:This is amazing I have been fabricating for about ten years and have never been one of those guys who could cut great with a torch I could get it good but not that real clean smooth cut. That top melting is a problem I just assumed you had with o/a. Now I realize that is because I wasn't properly adjusting my cutting flame. Multiple welding classes and nobody ever explained that! I know different tips for different jobs but do you find you have one that cuts most material between 3/16 an 3/4 well for you?www.burdettenetworks.com
Reply:Pic of the style torch he's using. Fairly plentiful on Ebay, and OADoctors site has seal kits if I recall correctly. Attached Images
Reply:Originally Posted by kburdThis is amazing I have been fabricating for about ten years and have never been one of those guys who could cut great with a torch I could get it good but not that real clean smooth cut. That top melting is a problem I just assumed you had with o/a. Now I realize that is because I wasn't properly adjusting my cutting flame. Multiple welding classes and nobody ever explained that! I know different tips for different jobs but do you find you have one that cuts most material between 3/16 an 3/4 well for you?
Reply:Do they use the term "slag" in industry? What i mean is, is the term slag, when using o/a cutting, acceptable? i learned that the correct term is Dross. Just want to know if you guys use this term when talking about oxy acetelyne cutting. You only get "slag" if you are using flux...right?
Reply:Just watched all your videos. Great videos for showing how to properly do oxy acetelyne cutting. I loved cutting with oxy actelyne in school. I got fairly good for only having two weeks. Nice straight cutting lines and very little Dross/slag. I think the biggest factor is the torch, and how the flame is set. The fist thing the insturctor told us, is to adjust it like you did in the videos.
Reply:Very good vids there Wayne. It's nice to see someone who truly knows how to use a torch. Shows the new guys that you really don't need to spend a lot of money on a plasma to get nice clean cuts. Simply knowing how to cut with an OA torch and getting the settings and travel speed right will go a long ways to getting a very nice clean cut..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:Those are good videos, and very informative. 7PSI on the gas (Acetylene) and 40PSI on the oxygen is what I was taught as a general rule, and it usually works about right. I've had to turn the oxygen up some on thicker stuff like you demonstrated.We scrapped some old junk this past summer, and I had two OLD trenchers that I wanted to keep the motors out of. We had re-powered them several years ago with Deutz diesel engines, replacing the original hercules and red-seal gas motors. Anyway, one of my guys working for me said he could use a torch, so I let him cut on them while I was doing some other stuff... Somehow, I still havn't figured out how, he used up an entire tank of Acetylene, while only using about 800 pounds of Oxygen. And I ended up having to re-cut most of what he attempted to cut... His cuts fused themselves back together... I know he didn't have the torch set right, but my gawd, how did he use so much Acetylene??? I carry 2 Oxygen and 1 Acetylene tanks on the truck, and usually it works out where I change all of them at the same time. I know the regulators were set on 7 and 40, because I made sure of that before I turned him loose, and he said he knew how to set a torch... Of course he told me he could weld once too... took about 30 seconds to figure out he was wrong about that... then a couple of minutes to grind out what he did... It wasn't anything critical, just scabbing a plate on the bottom of a rock box where someone had stuck the trackhoe teeth thru it, but it was REALLY ugly...
Reply:Awesome videos!Thanks so much. Do you think you can do one just on gas pressures and flame adjustments?TA Arcmaster 300CM3XMT 304S22P12 suitcase feederX-Treme 12VSOptima pulserTA161SMaxstar 150STLHypertherm PM45OP setupStihl 020AVP, 039, 066 Magnum
Reply:Those look like some pretty flexible gloves for the size of them.What I see missing is using a block under the hands as the thickness of the piece increases. These videos show cutting an object at it's thickness above the surface to rest the hands on. That torch's dimention from the end of the nozzle to the centerline of the handle is less than most and the propane guys will want to have more hold off. Obviously you have a steady hand and have perfected your technique. Once you make one cut it pretty much preheats the piece so less preheat flames would be necessary for another close cut.
Reply:Originally Posted by BlackGT97Do they use the term "slag" in industry? What i mean is, is the term slag, when using o/a cutting, acceptable? i learned that the correct term is Dross. Just want to know if you guys use this term when talking about oxy acetelyne cutting. You only get "slag" if you are using flux...right?
Reply:It would be really cool to demo another video, this time turning off the acetylene after starting the cut to demonstrate how oxygen cutting really works (unlike plasma cutting where molten metal is just blown out of the kerf)XMT304 (school)SP125+ (home)HF 4x6 BandsawGood judgement comes from experience and much of that comes from bad judgement.
Reply:Originally Posted by wireheadIt would be really cool to demo another video, this time turning off the acetylene after starting the cut to demonstrate how oxygen cutting really works (unlike plasma cutting where molten metal is just blown out of the kerf)
Reply:Thanks for the videos, just what I needed as I am working on getting better with my OA. Also, I like your table. I have a heavy framework ready for my cutting table but haven't decided on a top yet. Can you post up the details on yours or maybe a link if you already have?ThansMiller Challenger 172Miller Thunderbolt AC/DC 225/150Miller Maxstar 150 STLVictor 100CVictor JourneymanOxweld OAHarris O/ASmith O/A little torchNo, that's not my car.
Reply:If anyone wants to save these videos, the Downloadhelper add-on for Firefox works well. If you save them as .flv files, vlc media player will play them. Both free with no adware/crapware.
Reply:Originally Posted by bigbThanks for the videos, just what I needed as I am working on getting better with my OA. Also, I like your table. I have a heavy framework ready for my cutting table but haven't decided on a top yet. Can you post up the details on yours or maybe a link if you already have?Thans
Reply:Here's the next segment in this video.Millermatic 252XMT 304'sDynasty 280DXHypertherm PowerMax 1250Miller Trailblazer 302 EFIOptima PulserXR feeder and XR Edge gun and more athttp://members.dslextreme.com/users/waynecook/index.htm
Reply:Here's the last segment of this video. Here's the two videos I placed in the other thread. I was still learning on them but they may show some things. I uploaded them in HD but I've had to quit that because of the long upload times. I just got a chance to view these after uploading. I think I will try to upload a little higher resolution versions over the next few days.Last edited by irish fixit; 12-04-2011 at 08:48 PM.Millermatic 252XMT 304'sDynasty 280DXHypertherm PowerMax 1250Miller Trailblazer 302 EFIOptima PulserXR feeder and XR Edge gun and more athttp://members.dslextreme.com/users/waynecook/index.htm
Reply:Wayne, you've covered more ground on how to use a cutting torch w/ this thread on this site than I've seen since joining. MikeOl' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:Your video "Adjusting a cutting torch and other tricks 1" is the best description for setting a torch flame I have come across. At the shop I worked at a man couldn't run a torch on a money job unless he could acheive that setting. Each tip is rated for different thicknesses and like you have mentioned a single tip can be used from very thin to thick by adjusting the preheat and O2 pressure but your loose that cherry spot where the flame lengthens and has the little whipping sound when the O2 is pressed. The absolutely best cuts come from when a flame and tip are in that cherry spot.I was responsible for teaching all the new guys the ropes on cutting at the last shop I worked for. It was interesting to see seasoned weld hands response to the class. many were angry they had to take a cutting class. many of them could outweld me by miles but when it came to cutting blind beavers could have made prettier cuts. After the class, many of the ones that were angry at the first were making great cuts. I think mostly it was their pride being bruised alittle. Bracing is most important thing in cutting, and a clean tip is it's twin sister. if you can't have those two thing you won't have a good cut. I will never forget when on of the welders scare everyone by cutting a 24" diameter 3 inch thick slug and it fell though cause the cut was so clean. It was common practice to weld a pad eye on the slug to lift it out of the future manway opening. seems the welder typical had to beat with a sledge on the slug and curse at it for while before it would give up and come out. He was sitting on top of a 120" can and was just finishing his cut when the slug slipped through the opening and came crashing down on to a buggy feeder underneath. the man inside had to clean his drawers. With all the crashing and cursing we though the slug had landed on the man. After the incident write up the welder who had cut out the slug was so proud that the cut was a through and through and he didn't have to beat on the slug to get it to come out. Before anyone says the pad eye should have been welded on before the safety cuts are cut, in the welders defense, in all the years he worked there he had never ever had a fall through. ALL of his cuts were in need of a big hammer and the power of the crane to pull the slug out. You gotta love a clean cut. He was using a victor 315 with a number 4 cutting tip.Thanks for posting the videos.Last edited by Scott Young; 12-04-2011 at 11:50 PM.
Reply:This is some great stuff. I really want to thank you for taking the time to do this. As you noted, there just isn't much info out there on the details that make cutting work. I know I have a loooong way to go myself. The problem is that some of these shots need to really be zoomed in a lot more as I just can't see details (things like you describing the flame as you adjust - you can't see what the flame is doing well enough to match up with your comments).I don't want to take anything away from this, as I greatly appreciate the time you have spent doing this. I'm just trying to get any last bit of info I can.I've had good luck using the easy (and free) Windows Movie Maker in the past to stitch together multiple video clips, so that could be an option, if you are interested. Or just even some close-up shots in separate videos. I'll take anything! Attached Images-DaveXMT304 with: 22A Feeder, or HF251 Hi Freq DC TIG air cooledHi,just joined not too long ago but I've got about 45 years in it.The videos are great.You're never too old to learn,I guess.Do a lot of cutting and am about to switch to propane.Usually between 7 to 10 on the acet.Bought a couple of tips for my Victor 300 today,gonna get the tank off the BBQ grill tomorrow.If anybody has any helpfull info I'd appreciate it.Really good vids!
Reply:the preheat will take just a tad longer, but once you get the cut going, travel speed is so close you won't notice a difference. The cut also is as high of quality as the acetylene. We use propane on the cutting table but we still use o/a for all the hand torches. One day we will change all of them over. I use both at the house. I would take the acetylene tanks off the truck and finish them out at the house and when I run out I use propane to carry me over. I didn't like running with partial tanks on a truck if I could help it. I have noticed lately a few guys running everything off of propane. they are using propane to run their welders and cutting needs.
Reply:Originally Posted by Scott Youngthe preheat will take just a tad longer, but once you get the cut going, travel speed is so close you won't notice a difference. The cut also is as high of quality as the acetylene. We use propane on the cutting table but we still use o/a for all the hand torches. One day we will change all of them over. I use both at the house. I would take the acetylene tanks off the truck and finish them out at the house and when I run out I use propane to carry me over. I didn't like running with partial tanks on a truck if I could help it. I have noticed lately a few guys running everything off of propane. they are using propane to run their welders and cutting needs.
Reply:Originally Posted by mla2ofusWayne, you've covered more ground on how to use a cutting torch w/ this thread on this site than I've seen since joining. Mike
Reply:Originally Posted by BlackGT97Do they use the term "slag" in industry? What i mean is, is the term slag, when using o/a cutting, acceptable? i learned that the correct term is Dross. Just want to know if you guys use this term when talking about oxy acetelyne cutting. You only get "slag" if you are using flux...right?
Reply:I was thinking this thread should be a sticky, on it's own or maybe in the existing Oxy sticky.Miller Challenger 172Miller Thunderbolt AC/DC 225/150Miller Maxstar 150 STLVictor 100CVictor JourneymanOxweld OAHarris O/ASmith O/A little torchNo, that's not my car.
Reply:Thanks Too I've owned torches for prob 20 years and Just discovered I wasn't taught right or doing it right thanksMiller thunderbolt 250Decastar 135ERecovering tool-o-holic ESAB OAI have been interested or involved in Electrical, Fire Alarm, Auto, Marine, Welding, Electronics ETC to name a just a few. So YES you can own too many tools.
Reply:Originally Posted by bigbI was thinking this thread should be a sticky, on it's own or maybe in the existing Oxy sticky.
Reply:Darn good thread here Irish, prolly should drag this one and the one Steve started a while back in a sticky "topic" along with some of the other super threads like "Mig like Tig" etc.I'd sure like to find that dumb sumb!t@h who taught all those super gas hands to shut the fuel off first when they were done... Matt
Reply:Originally Posted by Matt_MaguireDarn good thread here Irish, prolly should drag this one and the one Steve started a while back in a sticky "topic" along with some of the other super threads like "Mig like Tig" etc.I'd sure like to find that dumb sumb!t@h who taught all those super gas hands to shut the fuel off first when they were done... Matt
Reply:Something that is missed is how the torch is moved. If you watch closely the right hand is swinging the torch left and right in an arc. The left knuckle is your fulcrum. This is the IMPORTANT part: You roll your knuckle slightly to move the torch closer or farther away from you as you swing the arc with your right hand. It is very subtle but until someone points it out to novices they miss it. If you don't roll your knuckle you will cut an arc. Really good vids * slaps on back* :')
Reply:Thanks a lot for that information. Helped me out a lot. Much appreciatedHTP Invertig 201Lincoln Idealarc SP250Miller 180 AC StickBy farmall:They should have held the seagull closer to the work, squeezing evenly for best deposition.
Reply:Originally Posted by lotechmanSomething that is missed is how the torch is moved. If you watch closely the right hand is swinging the torch left and right in an arc. The left knuckle is your fulcrum. This is the IMPORTANT part: You roll your knuckle slightly to move the torch closer or farther away from you as you swing the arc with your right hand. It is very subtle but until someone points it out to novices they miss it. If you don't roll your knuckle you will cut an arc. Really good vids * slaps on back* :')
Reply:Originally Posted by lotechmanSomething that is missed is how the torch is moved. If you watch closely the right hand is swinging the torch left and right in an arc. The left knuckle is your fulcrum. This is the IMPORTANT part: You roll your knuckle slightly to move the torch closer or farther away from you as you swing the arc with your right hand. It is very subtle but until someone points it out to novices they miss it. If you don't roll your knuckle you will cut an arc. Really good vids * slaps on back* :')
Reply:Irish, you're a Steel Surgeon. Thank You for sharing your knowledge and experience. Thank You for taking the time to video tape and upload these clips. I've watched every one.This should be a sticky. I'm a member of three or four welding forums, and none of them have this information (at least I couldn't find it), but this stuff is something everyone with a torch has to learn at some point.What's next for video tips? Reloading ammo, smoking meat, lap dances?
Reply:Wayne,Could you demonstrated washing welds and rivits? Before carbon arc was king O/A was all that was used. I use a scarfing tip. There are a variety of tips out there to choose from. My method of washing a weld say a fillet with a O/A is said to be backwards, but it works well for me.Always looking to learn more, would you mind demonstrating how you use a scarfing tip?
Reply:Always looking to learn more, would you mind demonstrating how you use a scarfing tip?
Reply:This thread is so great! One of the best I have read since being a member and I have been one a long time. I have learned more about getting good o/a cuts from this than I know what to do with. This morning was out on a job had to cut some pipe down and some plates and had to do NO GRINDING cuts were smooth dross popped right off and the customer noticed to. He said "damn i need you to teach me how to use a torch like that!" I just laughed and said well it takes a few years to learn... Thanks again Irish and any others who have posted great videos here. I too would like to see the washing techniques guys use for guaging and the like.www.burdettenetworks.com
Reply:Originally Posted by denrepI noticed Lotec's observation too. It's always interesting to see anther's M.O. isn't it?I use a slightly different method than a fulcrum at the knuckle, but previously didn't want to bring it up in Irish's thread. But since Lotec let the cat out...When I'm cutting a straight line in accessible work, I often rest the tubes of the torch on a "bridge" made of the fingers of my gloved "free" hand which is resting on the bench or the work. With the torch tubes resting on the "finger bridge" I'll then guide the torch along the cut line with push or drag from the handle end. For me, when following a line, it's usually easier to maintain smooth motion by "hinging" at my elbow and shoulder, for "steering" and travel. For me, hinging at the elbow usually allows for travel of at least a couple of feet in one continuous very smooth motion; more or less, depending on obstacles and torch design. Again, it's just another way, and a matter of personal preference.Nice work and videos, Irish.Thanks for taking the time.Good Luck
Reply:I don't know anything about making videos, but if someone does a scarfing video can you adjust the F stop to cut the light way down or a #4 or #5 filter. A scarfing tip tends to make a lot of bright light so I'm thinkin' it's gonna be difficult to get a vid that you can see exactly what's happening. Just a suggestion, MikeOl' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:Originally Posted by Scott YoungWayne,Could you demonstrated washing welds and rivits? Before carbon arc was king O/A was all that was used. I use a scarfing tip. There are a variety of tips out there to choose from. My method of washing a weld say a fillet with a O/A is said to be backwards, but it works well for me.Always looking to learn more, would you mind demonstrating how you use a scarfing tip?
Reply:Originally Posted by Scott YoungWayne,Could you demonstrated washing welds and rivits? Before carbon arc was king O/A was all that was used. I use a scarfing tip. There are a variety of tips out there to choose from. My method of washing a weld say a fillet with a O/A is said to be backwards, but it works well for me.Always looking to learn more, would you mind demonstrating how you use a scarfing tip?
Reply:Originally Posted by mla2ofusI don't know anything about making videos, but if someone does a scarfing video can you adjust the F stop to cut the light way down or a #4 or #5 filter. A scarfing tip tends to make a lot of bright light so I'm thinkin' it's gonna be difficult to get a vid that you can see exactly what's happening. Just a suggestion, Mike
Reply:Wayne, the filter setup you have now works great!! No need to see what's happening around the flame, just what's happening in the flame. Wish we lived closer to each other. I don't consider myself expert at any metalworking, just had lots of practice at stick welding iron and O/A welding, cutting and brazing for 32 yrs. I never touched a mig 'til after I retired. MikeOl' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:Originally Posted by mla2ofusWayne, the filter setup you have now works great!! No need to see what's happening around the flame, just what's happening in the flame. Wish we lived closer to each other. I don't consider myself expert at any metalworking, just had lots of practice at stick welding iron and O/A welding, cutting and brazing for 32 yrs. I never touched a mig 'til after I retired. Mike |
|
发表于 2021-8-31 15:01:18