Basic Oxygen/Acetylene Brazing
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- čas přidán 28. 08. 2024
- In this video: Jeff shows how to braze using an oxygen and acetylene, how to set your gas mixture and the correct way to light your torch. At the end of the project he will show the proper shut down procedure.
Darkmoon Metals is a home based business start up, I have decided to live my dream and work for myself. (not like anyone is hiring at the moment) I am a trained welder with a strong interest in blacksmithing, join me for my ups and downs while I learn as I go. Trying to forge a new life in a dead economy that has left many blue collar people just trying to survive.
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All videos on CZcams should be this good; well made, simple, no BS, put together by someone who actually knows what they are talking about
Thanks!
Thank you so much :)
Just did my first braze job after watching this. The part about adjusting the regulators pressure was very helpful. Thanks for making this excellent tutorial.
I have regulators from the 1970s that I have never backed the adjustment out ever when shutting down and they still work fine.
Glad i found your video that you have added basic set-up instructions for tank valves/ gauges as my dad was a welder and we always had intentions to take time to teach me about welding and had all these projects we wanted to do, but between my business and his bad health and all the other life stuff that takes up time, we just never got time to do much.
I kept forgetting the basics of set-up as he would always make a point to show me how to set the gauges and not to damage the diaphragms but then it had been years since he was able to do much welding and for me with all the other things im working on all the time on i dont get to spend time on practicing and its skills and knowledge that if im not doing it all the time, i just forget details.
My dad just passed away couple months ago and i never got time to learn some other things i wanted to ask about welding. I always wished i would have took the time to spend with him to learn more skills and things that ya just learn by doing.
So thanks for the basics there it was one of the important bits i always kept forgetting how to do in what order and exactly how much to set the gases at.
I had a brass clock case that someone drilled holes through and im trying to patch the holes, but would like to do it with solid brass so i can smooth it out and polish it so the holes are barely noticeable.
This is a very good question, in fact it gives me an idea for a new video :)
The easy answer is Brazing is done with a brass or bronze rod and the parent metal being joined just needs to be very hot, it does not need to melt.
Gas Welding: Same equipment but you are using a filler rod that is made of the same material as the metal being joined. Steel rod for steel, I have even gas welded stainless with the right rod. Gas welding you also get the metal to melt slightly to form a weld puddle.
Good video and good safety briefing which most videos fail to do.
well done Jeffery...cheers from Florida, Paul
I was as well the first time I saw a brazing demo. This rod happened to be brass, but did the job. My old instructor brazed the end of a pipe to a plate, let it cool and challenged us to break it. We beat on it for so long we ended up cracking the pipe, his weld never flinched. If it is done right the braze should be stronger than the parent metal. :)
Well done, man! I spent about an hour watching other videos before firing up my torch (it has been a few years since the last time I've brazed something). Your video covered all that and then some in about 11 minutes! Thanks man!!!
Wow, I never knew brazing was so strong. Thanks, good video.
Thank you Jeffery for sharing this information with others.
Jeffrey,
I'm looking for a new hobby and this was very helpful. Thanks for taking the time to share your knowledge by making this video! This was a good starter for me to see that it is definitely something I could learn to do and with a bit of practice become comfortable with.
The torch set I have is very old and is not made anymore, many of the tips should have been replaced already. I am using this set until I can afford to buy a new one.
I am glad you enjoyed the video and if you have any other questions I'll be more than happy to answer them... maybe even make a video on it :)
Take care and thanks for watching.
Agreed! always use a neutral flame for brazing and carburizing is only for welding stainless steel sheet metal, but the Cobra DHC 2000 can join up to 9.5 mm thick.
I like the part where the lap joint becomes a t joint. 10/10 would watch again.
Nice job on the braze job Jeff! I think you did very well on it. -HVAC Technician in Training
The guys are working on this in the classroom across from my computer lab, it actually smells good, like a pine scented candle.
The appearance of the braze will improve over time, what is important is the strength of the joint. I have seen very pretty welds and brazed joints fail... Keep up the good work!
From what I have read paint has a hard time sticking to any brazed surfaces, it tends to bubble and flake off. I don't know if its a chemical reaction between the brass and the paint or what. What I would suggest is to call a local welding supply center and ask them if there is a paint product they are aware of. If there is I am sure they'll be willing to try and sell it :)
Excellent that you mentioned a practice period before starting on the actual work. I find I sort of calm down and get back in the groove when I practice first, plus if have similar metals to the actual work I can "dial" in the best settings. Note: I still can made some frightening welds even then.
Good safety tips, and I like to use TIG gloves most of the time, easier to hold stuff.
thank you for taking the time to make this video.
sounds good, the only difference that I was taught was to increase the acetylene until the black smoke is nearly all gone before adding the oxygen. I personally don't know if one method is better than the other.
The bang can be a few different things. The two most common I see is the oxygen being added to fast can cause the flame to go out, the second is if the dirty tip dirty or its been cleaned so many times that the hole in the tip is not the correct size. Good Luck in school!!
Thanks for the video first time I have seen the brazing process good job and good luck
Me: "Man, I wish my brazing looked half as good as that"
Jeff: "As you can see I'm out of practice"
Me: * weeps *
Do a video on round stock welding. Like some 5/16 steel. I'm making T handles for sockets. And would love to see some round stock welding and brazing
Here to learn so I don’t get fired 😂 started a job n be messing pipes up. I’m learning tho
I have never used an Oxy/Propane rig before for brazing, I am know it can be done because I found brazing tips for a propane setup online.
Ujj Tg, for some reason youtube will not let me reply to your comment, so I'll post it like this because its a good question.
You asked, "Which gas did you turn off from the torch?? was that acetylene first or oxygen first? We have been taught to shut the acetylene first from the torch.Can you please clear this??"
I find that this is personal preference for a lot of people I always shut off the Oxygen first to avoid that loud pop that sometimes happens when the fuel gas is interrupted.
Millers website answers it in their FAQ page like this: You can shut off either gas first, but turning off the oxygen first and the fuel gas are most commonly recommended.
Source: FAQ_TorchOperation.pdf
When the cylinders are in use they are kept side by side chained to a cart that can be rolled around the shop. If you are connecting new cylinders and using them for the first time you always do a "leak check" with a little but of soap mixed with water, if you see any bubbles around the connections you know you have a leak and not to light the torch. Most hoses are between 8 and 12 feet long. The closer you are to the cylinders the faster you can shut them down if a problem comes up.
Thanks, dude! You did a great job. I have been getting into all facets of welding, and, want to learn how to build up bronze for propeller repair. We live on the Snake river, and there are lots of jagged props that need to be repaired. I do have a great instructor, and now, I have found a new one, Thanks again.
Thanks Jeff, now I see what I was doing wrong. I'll try your method. I was getting rather frustrated cause I had the Ox way to high and the flame to a fine blue tip on low pressure. Didn't work so well. Search and found your video. Now to put it to use.
Scott
Thank you so much, I will try your method, (Get rid of the black smoke before adding Oxygen)
My teacher also told me the equipment is really dirty and I think that's probably why it is always giving me heart attacks :D
Wish me luck, I still have to do 1-2 more brazing to finish off my project.
That's ridiculously strong! nice
I believe in this case the popping was caused by the torch tip coming in contact with the project. A very small amount of molten brass on the tip disrupted the gas flow. 9 out of 10 times when it occurs it means the tip needs to be cleaned or replaced. The tips are a consumable, every time you clean a tip the hole gets slightly larger.
I was lucky I was nearly done, if I had hit the tip closer to the beginning the popping would have been during the entire braze.
Good joint there.
Fantastic video and phenominal teaching style! Suscribed even before the end of the video.
I can hear my instructor standing over me, yelling..more Rod more Rod!
Funny mang.
OMG, I tried your method and this time, no "bangs"
Thank you so much, finally successful brazing although it doesn't look too well
Thank you for the explanation.
Great video
This is one of the things I love about youtube :)
Thank you for sharing your experience and insight with us, I'll definitely try your hot water suggestion if I come across a project that calls for painting of any of the brazed joints.
It's pretty enough. Thanks.
Good information, Learning how to weld you can earn $140 per hour reconditioning RV refrigerators.
That took a good beating. Looks good to me. Pretty is bullshit. Can still be done if wanted. Good job. Nice torch tips to live by.
if someone wants to make a pretty brazed joint then a Mig or Tig machine is more suited for that
Thanks, once, I tested my brazing with an accident
I was trying to sand off the excess brazing with a sanding belt and I accidently got it caught in between the belt and the machine, I am find and so as the brazing but the sanding paper was broken.
So, yes, I think the brazing was great :D
Thanks
Nice video, great way to teach brazing!
Loved ur video brother thank u for simplifying it the way u did 👍🏽
Excellent teacher! Thanks.
I'd also like to add the "O" rings may need replacing on the torch head if there is a pop or bang.There are two per head.check for cracks or ware.If the torch hasn't been used in a while,I would closely inspect .Home depot carries most sizes
Thank you very much, welcome to the channel :)
An old timer told me to use the regulators instead of the torch valve to get a neutral flame. That way the torch valves are just used to shut off and turn on the gas. It's much faster. There is less pressure in the hose. I have been doing this for a long time with no problem. It seems even safer but is it? When doing artwork on the bench I light a candle. I call my candle Pilot.
sometimes it doesn't need to be pretty but it works and very strong.
Thank you for the comment and subscribing to the channel...
Very helpful video. Thanks
Part 2: Here is where it gets interesting, lets say you work in a shop and you have several cylinders and most of them are being stored. The fuel gas must be kept separate from the oxygen, in the text book I learned from in school it states that they should be at least 25 feet apart or separated by a half wall with material fire resistant enough to withstand 30 minutes in a blaze.
Cylinders are very safe if you just follow a few simple safety rules and use common sense :)
Thanks for watching!
hey Jeff i am watching this from South Africa. I have learn't a lot. Now to my workshop to try it out. Send you some pictures of my workshop for advice. This is my hobby.Do you take questions.
I disagree with keeping the rod in the flame. That will oxidize the rod and add impurities making it less likely to stick. Instead you should heat the metal and dip the rod onto the hot metal and let the metal melt the brazing rod. The brazing rod by design melts at a lower temperature than the metal you are brazing together and you should not have to heat it with the flame to melt it.
hi there. i had some experience with gas welding in school eons ago. so its nice to see your video, serves as a refresher of sorts. quick Q. when is it called welding and when is it call brazing? please help clarify this for me. keep up the good work posting these vids sir. take care.
If your interested in this type of thing there is a channel you have to check out, his screen name on youtube is "897473"
His whole channel is brazing, copper work and very interesting projects, if you have not run into him yet I think you would enjoy his videos too. Thank you so much for the comment, hope to see you around the web again :)
Pretty good video but did not give details on how to adjust the tip of the flame.
Thanks for sharing. I wonder why the warm does not come up through the filler rod which as you point out has to be in the flame all the time..
thanks men,very helpful.
enjoyed this video ,thanks
Good video. Vapor mask is recommended.
I am very glad you liked it... If your interested in this type of thing there is a very good channel, "897473" I know its just a bunch of numbers but is an actual channel :)
His name is George and he has been gas welding and brazing longer than I have been alive, I went to school for welding and I have still learned new things watching him. Thank you for stopping by my channel, hope to see you again soon.
Jeff - very helpful video. I heard some popping at the end of your braze. Why did that happen? Thanks and please make more videos.
Thanks for sharing. It held! LOL
You moved in the opposite direction of the way you said to run the joint. Which is better? Welding away from you or welding toward you?
Thanks, much appreciated.
It certainly is a very strong braze isn't it!
just curious where are your gloves or are your hands iron. no offense but I did not see a neutral flame and the flame should have a feather about 3/4s of the flame and be adjusted according to metal thickness and rod type. other than that just probably should have a uv screen over the camera or get a attachment so the audience can see the technique such as dipping the rod and not dripping I could not see in this video due to the flare coming from the flame. I really enjoyed the video though.
Great video! Can you do that with propane? My victor cutting torch set has propane tips and propane tank, it has saved me tons of money over the years. But now I want to braze a cast iron vise. The torch is hot enough to cut 1" thick metal, so I figure I can braze with it. I can't find any torch rose bud tips that say "propane" on them. Any advice? Thanks!
amazing...
Thanks
Have you ever brazed brass 1.2mm sheet to brass tubing with a brass rod ? Have a project coming up & I'm afraid I'll buckle the sheet section ,any advice ?? Thks
Great video, but you didn’t mention the type of flame? Neutral?
Just wondering
My teacher tough me to:
1. Brake the Acetylene tap just by a little
2. Strike and start the fire and fire should have black smoke coming out
3. Slowly open the tab of Oxygen until there's a little blue fire appearing at the nozzle
Is it ok?
P.S. If when the Oxygen is added, sometimes the flames goes out with a 'bang", what does that mean I done wrong
Please reply, just willing to do better at school :D
Can you shed light on the Hobart Copper coated Steel Rods (RG-45) and their uses? Can they be used for brazing and if so is it the same technique? Good video, shows how strong brazing is. Thanks!
Brazing is closer to soldering than it is to welding. With brazing the parent metal is heated and the brass, bronze, copper or alloy is used to fuse the to together.
With steel rods they are used for welding. The parent metal actually melts and the steel filler rod flows into that material and created a weld puddle. Most steel rods (unless flux coated) are plated in a very thing layer of copper to prevent rust or corrosion.
The upside to learning gas welding is that if you are already familiar with brazing you'll pick it up quickly. It uses the same shade 5 welding glasses, since there is no ultra violet light a full face helmet is not needed.
How big of a flame should you have before brazing?
Great video, thank you!^_^
You braised that shit homie
NICE VIDEO
Hey Jeff, I was trying to braze two bolts to a section of steel today. The brazing rod took to the nuts but not the plate. What would cause this?
Does anyone braze with Oxy/propane? I've never brazed, though I weld w/stick & mig and I have an Oxy/propane cutting torch. My Home Owners Insurance has a stipulation about not having Acetylene gas, so I use propane. I'd love to see a video about brazing with Oxy/propane.
Great thanx!!!
Hi Jeff ! What tip number you use for this ? What kind of brazing rod you use for this. Thank you for sharing. I am learning from you.
Do we want a reducing, neutral, or oxidizing flame?
Nice. I tried to cut brazed cast iron with a hacksaw and it ruined my blade teeth.
I see :(, that's why I use an angle grinder with a cutting wheel for stainless steel.
So to clarify, you used a flux coated brass rod to join to pieces of steel?
Also, where did you get the flux coated rod? Any special specs on it?
Flux coated brass rods are not that common and I only had them left over from a project. If your looking to gas weld go to any welding supplier and ask for "Flux Coated Low Fuming Bronze Brazing Rod" they are a lot more common. A few different manufactures make them. Lincoln Electric rods might even be available at Home Depot since they sell Lincoln welding products.
I think the max thickness for material to be brazed is 2 mm. Have never seen anyone braze stuff 3 mm or thicker.
I have brazed 15mm thick vice parts and teeth on a gear which is pretty thick, maybe you mean fuse welding.
thanks for the info sir.
so for brazing you melt the rod so that it flows along heated parent material
or
is it the heated job surface that melts the rod when the rod comes into contact with the heated material...
7:28 FUCK YEAH!!!!
Why is this better than brazing with a turbo torch
2 times my 5 number brazing nozzle burn out after i complete brazing ,when i closed acetelyne first.plz help me.
what size tip do you use and rod size?
Nice video. I enjoyed it, but... you talk about how its unsafe to light the torch with a lighter and I just had to giggle a bit as I watched the rest cuz I see you do a few things that are in my opinion way more unsafe. Your not wearing proper ppe. (shirt looks like a polyester blend, you should have a flame resistant weld shirt on. No gloves. You braze this on a concrete block which can blow chunks of concrete in the air (which it sounded like it did in the end of the braze). Turn off the oxygen first, then the acetylene when putting out the torch. Ex pro welder, so I got quite a bit of experience doing this stuff so just want others to keep this in mind after watching this vid. Not trying to knock it. Good Braze man.
What would happen if you inhaled or ingested any of the powder or dust from a finished braze? (Using pre-fluxed brass rods. Not sure the type of metal, but its roughly 1mm thick "silver looking" sheet metal.)
Which gas did you turn off from the torch?? was that acetylene first or oxygen first? We have been taught to shut the acetylene first from the torch.Can you please clear this??
If you turn the oxy off first you get carbon smoked flame, but if you turn off the acetylene first it just goes pop and finished then turn of the oxy.
how about getting a wireless microphone for your next video?
Hi, I'm very new to brazing and i'm trying to learn all I can, I was wondering, is brazing the best choice for joining thin sheet metals where heat warpage is a concern?
And you need them why? If you do it right you feel nearly no heat, there is no UV light nor are there any sparks. If you cutting steel with a torch then yes. If your are brazing or gas welding and wearing big bulky gloves its a sign of being a bit of a noob.
eleminate the hollow background for a 10
Thanks
people talked so normal just 8 years ago.