Any fabricators using the DcH2000 cobra

Roc City Cafe said:
there's some other stuff going on with 41 series and tig, and if a post weld heat treating is done, there's no reason not to use tig, but oxy is usually used on 41's with bronze because the cool down time is a lot longer than tig and peak temperature is lower. with tig, the high heat and fast cool down causes a smaller grain size to form in the weld zone, which increases the hardness but lowers the tensile strength, leading to the common failures of 41's in weld zones. this can be avoided by heating the weld area pre and post welding with a torch, allowing the tig joint to cool down at a much slower rate
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can you TIG using the SIF bronze rod as filler?


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The reason I ask that one of the criticisms with the SIF bronze rod and using the SIF flux is that it's very difficult to achieve the concave fillet weld but there are other fluxes out there that make it easier to use the sif bronze rod with oxy acetylene in other words the correct flux makes the process smoother and with the TIG I assume you wouldn't need flux


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canyoncarver said:
Let us know what you think of that Cobra torch. I've been looking at them too. Nice playground upgrade!
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thanks canyoncarver! We will keep you posted and chronicle our welding adventures on this string!


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http://cycledesignusa.com/wp/?page_id=181 has anyone use this low fuming bronze LFB paste and rod? This is the flux paste that was recommended for the SIF bronze rod.


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you can tig with silicon bronze as a filler, the metal still needs to be equally as clean though as I don't recommend using a bronze filler with flux, actually, when I bronze weld steel, I don't use a flux with a torch either, the silicon bronze will flow well onto the steel once it's hot enough, doing it with tig can be tricky though as it's easier to melt the base metal
 
really enjoy your input here roc very informative
the majority of experience i have with tig brazing was back in the olden days when i was employed at an auto trans torque converter rebuilding operation
on certain heavy duty use stators we would tig braze, using silicon bronze filler, the fins where they were folded over to increase their strength,and stop flexing which had all kinds of negatives
it was actually fun after you got the knack of it
here is an image of a factory brazed stator
5r55pump.jpg
 
Roc City Cafe said:
you can tig with silicon bronze as a filler, the metal still needs to be equally as clean though as I don't recommend using a bronze filler with flux, actually, when I bronze weld steel, I don't use a flux with a torch either, the silicon bronze will flow well onto the steel once it's hot enough, doing it with tig can be tricky though as it's easier to melt the base metal
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thanks Roc! Zeke and I enjoy watching your videos on YouTube!


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xb33bsa said:
really enjoy your input here roc very informative
the majority of experience i have with tig brazing was back in the olden days when i was employed at an auto trans torque converter rebuilding operation
on certain heavy duty use stators we would tig braze, using silicon bronze filler, the fins where they were folded over to increase their strength,and stop flexing which had all kinds of negatives
it was actually fun after you got the knack of it
here is an image of a factory brazed stator
5r55pump.jpg
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I can't wait to show Zeke this ...that is cool!


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Has anybody used Tony Foales software? http://www.king-cart.com/cgi-bin/cart.cgi?store=tonyfoale&product=Motorcycle+chassis+books+and+software.&cart_id=6321901.34742&user-id=&password=&exchange=&exact_match=exact
neny2eva.jpg
u9a5ypu2.jpg
7y3uzane.jpg



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I have never used it but when I was researching stuff for my bike it seemed like he has one of the most definitive pieces of literature for the common man to obtain on the subject. I believe that you can only buy his book from his site but it is in English correct?
 
clem said:
I have never used it but when I was researching stuff for my bike it seemed like he has one of the most definitive pieces of literature for the common man to obtain on the subject. I believe that you can only buy his book from his site but it is in English correct?
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yes that is my understanding and they have it in German. When we were visiting with Revivalcycles in Austin, Texas Stefan said it was the most comprehensive book on motorcycle frame engineering. He has a Masters in mechanical engineering and he said it was written for Zeke to understand. The books on Amazon are sky high and then I found his site. 100 bucks for the book 40 for shipping. Too bad we can't get a PDF download. Gonna shoot them an email.


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I had the software but my laptop was stolen somewhat soon thereafter, maybe if I email Tony he'll let me download another. As far as the book, I've had it for 3 years and the binding's just about broken, it's very thorough and even without the software, it will help you analyze your setups or custom fab before building, it's pretty easy to plug in a lot of the book info into excel and see how things will work. I never had the chance to use the software for any specific project, but in playing with it, I did find it had a bit of a steep learning curve. the book is great though, definitely worth it
 
Roc City Cafe said:
I had the software but my laptop was stolen somewhat soon thereafter, maybe if I email Tony he'll let me download another. As far as the book, I've had it for 3 years and the binding's just about broken, it's very thorough and even without the software, it will help you analyze your setups or custom fab before building, it's pretty easy to plug in a lot of the book info into excel and see how things will work. I never had the chance to use the software for any specific project, but in playing with it, I did find it had a bit of a steep learning curve. the book is great though, definitely worth it
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thanks Roc! We will be adding it to our library. According to the web site his cd rom is the only thing available at this time. Thanks for the info on the software we will wait on that!


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Will the book become available in print again? I'd rather have hard pages to flip through although a PDF or CD Rom is easier to read through at work ;)
 
Great video.
I LOVE this:
"In the back garden of our house, I, well, I cast some new engine cases"
Thats how stuff used to get done. Dont know how? Who cares, just do it.

i want to kill the cameraman though.
 
SONIC. said:
Great video.
I LOVE this:
"In the back garden of our house, I, well, I cast some new engine cases"
Thats how stuff used to get done. Dont know how? Who cares, just do it.

i want to kill the cameraman though.
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...and a lathe, makes his own dyno, in a shack/box! GRIT! That generation had grit! I love the story how he sneaked the oxy in to build a frame in his room after his land lady went to sleep and how he doesn't remember how he held the frame together to weld it! Probably two pairs of vice grips. Didn't need a 3 grand frame jig! The camera man WAS a little over enthusiastic! I do love how he captured their enthusiasm and the one idiot surfing on his phone almost falling asleep. I wonder how many haven't watched it because they didn't get through the first 13 minutes...YouTube gold! "Don't know how? Who cares, just do it!"


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I also love how he's been doing that for 50 years and when the guy asked about plastics for frame design in the future, he was absolutely open minded to the idea, most engineers I know who aren't even in their 30's are already dead set in the status quo
 
Roc City Cafe said:
too bad the sound is awful :(
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Sean it just goes to prove why you should make some more videos! It is important to the next generation! Can you imagine having a catalog of what Tony has forgotten that he has done? The great thing about the secrets of any trade is that it takes years of practice to get to a point to employ them. Zeke says, "maybe a frame?" Or just a beginning tutorial on silicon bronze oxy acetylene? :)


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