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I got some 3" tube and oxygen sensor bungs to fabricate a test pipe but I'm not sure how to go about welding the bung on the tube.The bung is square at the bottom so it doesn't conform to the shape of the tube.How do I go about this? Do I trim the bottom of the bung so it conforms to the tube? Am I supposed to drill the hole in the tube to the size of the inner diameter of the sensor bung and then fill the raised edges with filler rod?Am I supposed to drill the hole in the tube to the size of the outer diamter of the sensor bung, embed the bung in the tube and weld around it?I am totally lost here, any information or advice would be greatly appreciated.Thanks in advance.
Reply:You could do it either way, actually. It would probably be easiest to just drill the hole to the OD of the bung and set it in just far enough to mostly close up the gaps. Many production pipes have a flat spot stamped into them where the bung goes - which is probably done in the same operation as the punching of the hole.
Reply:Drill a hole in it close to the inner diameter, weld it.John - fabricator extraordinaire, car nut!- bleeding Miller blue! http://www.weldfabzone.com
Reply:Drill your hole to the OD of the bung. Weld away.Good luck!Patriot Performance AutoLincoln Power Mig 255CLincoln AC-225 StickVictor Journeyman O/AQuincy QT-5 Compressor
Reply:Thanks for the advices guys, much appreciated!
Reply:I always just ground the bung to fit the diameter of the pipe, set it over the hole I had drilled or cut to match the ID of the bung, and welded it down. Never heard them called bungs.
Reply:Migit, make sure you have no holes when you are done. Fresh air will screw with the O2 sensor.Prolly should grind the pipe first where you are going to weld.David Real world weldin. When I grow up I want to be a tig weldor.
Reply:Hey!, make sure the O2 sensor fits through the hole before you weld the bung on, or you'll be trimmin it with a die grinder. A friend of mine did that, yea a friend, wasnt me I swear.
Reply:Wouldn't it be a good idea to screw in a bolt into the fitting to keep the fitting from warping?
Reply:Originally Posted by c4cruiserWouldn't it be a good idea to screw in a bolt into the fitting to keep the fitting from warping?
Reply:1-machining the hole to oversize the major diameter of the thread is a nice thing to do, especially if one needs to run a tap thru the bushing after welding. Bushings can and do distort from welding--especially if you don't weld sequentially. Checking the type of thread fit, with the mating part--prior to welding, is a professional thing to do. I normally just plan on chasing the threads with a tap, to ensure fit. Often, I'll chase the bushing threads--before welding. 2-Grinding, etc. the bushing face to the tube radius is needed to avoid excessive distortion of that tube3-Using a hold-down bolt and nut--both with threads lubed with graphite spray (to avoid galling and be able to remove the bolt) is suggested to help counteract distortion and keep the bushing square to the tube4-Anytime one's welding a threaded bushing, nut, etc.---if that threaded hole is exposed, and mig or stick is used--you'll wish you had covered that threaded hole---to kept the little dingleberries out of the threads--which are now preventing the mating part from threading into the screwed-up threads. Any now, we can't tap it out, becuz we drilled at minor diameter, not oversize of the major diameter. Or we can order a bottoming tap, to correct this screwup.Fore-warned, is fore-armed.Blackbird
Reply:Drill a hole and weld it.That's all I did here!Sometimes people just over-engineer a project!
Reply:Originally Posted by TSORDrill a hole and weld it.That's all I did here!Sometimes people just over-engineer a project!
Reply:Originally Posted by TSORDrill a hole and weld it.That's all I did here!Sometimes people just over-engineer a project!
Reply:A spark plug should fit the threads to protect them. They are 14 mm.DavidReal world weldin. When I grow up I want to be a tig weldor.
Reply:Originally Posted by x1riderthanks for the picture. Did you drill your hole the size of the outer diameter of the bung and then sink it in the pipe a little, then weld? Thanks
Reply:I've welded a tub full of these things on, from 1/4" pipe up to 6" pipe and never had one to warp. I usually screw a pipe nipple in the small stuff loosely to hold it in place with until I get it tacked. Used both MIG and stick with no problems. Even brazed quite a few 1/8" bronze pipe collars to stainless floats and none of them ever warped.
Reply:Originally Posted by TSORDrill a hole and weld it.Sometimes people just over-engineer a project!
Reply:X1 rider, hmmm as in a BUELL X1? I am a Buell nut. have had 4 and love them....Yeah, yeah, I know you are a weldor too. But, are you a good one?
Reply:Originally Posted by dave powelson*****Presumably your response on over-engineering is directed to me.I mentioned the above items, since I've had all of them happen to me. When I do this type of work---I take 2 or 3 minutes---to help ensure--that things fit. That just saves me time, $ and aggravation. Some folks think before doing, others don't.
Reply:I have done it with a flat pressed into the pipe and I have done them with a hole cut or drilled to the O.D of the bung then set it inside just far enough to colse the gap then weld away.If it's too . get an office jobLincoln wp225g7 Lincoln 250 idealarcFrankenstein O/A set-up Weld-tech tig set-upLincoln sp 175 plus profax arc gouger
Reply:Originally Posted by ironkenX1 rider, hmmm as in a BUELL X1? I am a Buell nut. have had 4 and love them....
Reply:i love my 05 XB12R black and orange63' Lincoln SA200 2008 miller trailblazer 302fibre-metal pipelinermiller camo BWEand all the guns and ammo a growin boy needs
Reply:Ive gone through hundreds of SS fittings from 1/8" NPT to 3" NPT and never had one warp. We use an abrasive belt sander with a 3" wheel to cope the fittings so they sit on the tube. I would use a grinder to cope the fitting and leave the hole a size under, less chance of burning through and easier to weld IMO.Have we all gone mad?
Reply:Aah, haaaahahahahaa....he said "bung"Rider, had a 02 X1W as well and miss it, now I own a XB12S and love it! USMC, an XB12R and a Lincoln SA200......you're livin' right, buddy.Yeah, yeah, I know you are a weldor too. But, are you a good one?
Reply:Originally Posted by ironkenRider, had a 02 X1W as well and miss it, now I own a XB12S and love it! USMC, an XB12R and a Lincoln SA200......you're livin' right, buddy.
Reply:Ahhh, turboblown, as soon as he drills a hole in the tube, he will then have a .........bunghole. Protect the threads, a minute before hand and and ounce of prevention helps to avoid cursing and rework later.
Reply:Yeah, he he he....bunghole! Attached Images
Reply:What are you guys like 8 years old!!! Haha, just kidding!Here, just to prove I didn't make it up (calling the sensor ring bung, that is).http://www.innovatemotorsports.com/x...cat=251&page=1
Reply:1) O2 sensors are not 14mm sparkplug threads,they're 18mmx1.0.I've even heard people say they were 3/4"...2) When I spin up O2 bungs myself, I usually machine a small centering "shelf", as it was referred to earlier in this thread, to ensure that there's no interference with the major thread od. Keeps it centered in the hole.Prob wouldn't bother if bung was from a kit (one off job), but if I'm making my own, one more facing cut won't kill me in trade for idiot proof positioning.I've been instrumenting vehicles from prototype/production to 6 second race cars, some race cars use individual sensors for each cylinder, so things can get crowded.Sprocket
Reply:Hobart Stickmate LX AC/DC, Millermatic 252 & 30A spoolgun, Thermal Arc 185 TIG, Miller BWESmith Oxy-AcBridgeport 2J , South Bend 42" 9AHusky 7.5 HP 22.3 CFM 80 gal compressor
Reply:It's Cornholio!
Reply:Bungholio!!!!Bring me TP for my bunghole!!!!Are you threatening meeee?!?!?!
Reply:So I guess that's it for advice on how to weld a sensor RING on a 3" pipe then!
Reply:Oh....leave a dummy O2 sensor in the bung when you weld it to the pipe. They can distort and go out of round when welding.
Reply:I would drill a hole the OD of the bung, insert, do some tacks, and weld away!I'm 21 and learningAvid 4wd enthusiastASE Master tech (Automotive), mechanic/fabricator by trade |
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发表于 2021-9-1 00:00:42