1940 South Bend 11" 111B 105014 IQR Rebuild By Ulma Doctor

[Ulma Doctor]

Well, i Went and started the brazing repair by Twin Carbon Arc Torch :welding:
here are a few pictures of the old gal....
she fell down from the top of the ugly tree and hit every branch to the bottom.

as you can see, she's been hurt before!




Fire bricks inside the oven for slow cooling.
The fire bricks stay warm for a long time

i'm taking my time to make this repair, it may take 2 or 3 nights to get it to the way i want it.
who knows maybe longer...

 

[Ulma Doctor]

Man can not live on Bread alone....

i justified it as eating brain food for the learning experience....:lmao:

 

[Tony Wells]

The beauty of this area to repair is that it isn't in a stress prone location. If anything, you might want to examine closely the tee-slot after the repair. I'd say that if anything, it might draw up a little and the upper surfaces (the important ones) may need a light skim cut, along with the very top of the compound. But it should come out OK.

 

[Ulma Doctor]

Back to the mission...
i put the c/r back into the oven while i scarfed down some of the best eatin' fish i've had in a while!!!
when i came back i went in for a second engagement.

This was really fun to braze, the technique is a little different than oxy/acetelyne brazing.
i kept wanting to treat it like tig welding, eventually i got my game together and feel quite confident using my favorite brazing rod. it did make brazing a lot better and easier than using bare bronze rod. i had to try just to see what it was like to use the old school bare rod and then went to borax as a flux. it was better, but no where like the LBF rod!



i'm gonna call it a night,
thanks boys and girls for reading this chapter!
i'll be back with another chapter soon!!!!!

 

[Tamper84]

Looking good!!!! I just set up an electrolisis tank my self. Got it running for the first time now. An old vise, but depending on the results, my lathe will be seeing this as well. I am using rebar as my anodes though. Keep up the good work, it gives us all some inspiration!!

Chris

 

[Ulma Doctor]

Thanks Chris,!!!!!
the rebar anodes will work out just fine.
i would suggest getting the washing soda from Arm & Hammer.
it's in the laundry detergent isle at the grocery store or Big Box store. pretty cheap about $3.75 a box
if you are lucky enough to have a swimming pool chemical supplier in town, you can ask them for SODA ASH.
Soda Ash and Washing soda are the same substance (Na2CO3)(Sodium Carbonate)

To Make Soda Ash(Washing Soda):
What we are basically doing is removing hydrogen from Baking soda(NaHCO3)(Sodium Bicarbonate) to make Washing Soda(Na2CO3)
Get a couple boxes of Baking Soda and spread them out on the cookie sheet,You then bake the Baking Soda in the oven for an hour at 350*F.
this releases moisture inside the baking soda and actually changes the chemical composition of the Baking Soda, turning it into Soda Ash. this is the very same process Arm & Hammer uses to derive their Soda Ash from Baking soda.

i will give a word of caution, Soda Ash is irritating to skin and mucous membranes.
it is not considered to be a hazardous substance. but, i would suggest proper safety gear for the eyes and hands.
if you are going to make you own, i would suggest a dust mask(the paper type is fine) to avoid inhaling the fine dust when transferring the newly created Soda Ash to a sealed container.
i'm not sure of the length of time, but i'm thinking the Soda Ash will turn back into baking soda as as it absorbs humidity from the atmosphere. If you live in a High Humidity area, keep the container sealed until use.

i hope the info helps out!

 

[Tamper84]

Yup that's what's I used. Super washing soda. Except I had to go to three stores to find it lol. Even Walmart didn't have it. I eventually found it at rural king.

Chris

 

[ChuckB]

Yup that's what's I used. Super washing soda. Except I had to go to three stores to find it lol. Even Walmart didn't have it. I eventually found it at rural king.

Chris

I think the product I use was called PH Plus that I got at a pool supply store.

 

[Ulma Doctor]

i finally got a decent picture of the TCA brazing repair...

this is the first pass across the face.
Being that i'm right handed, i feed the brazing rod in my left hand, similar way as to oxy/acetylene brazing.
I make a very small circle with the torch to heat, but not over heat...
It's a little tricky to keep the heat just right, but as you can see a 43 yr old dog can obviously learn a new trick.

if i can do it you can too!!!!
just don't try to use the DC Cutting/Gouging they are a PITA to use. my results on another warm up piece was disasterous.
i haven't tried uncoated carbon rods. but i'm thinking of trying some experimentation:thinking:

i actually used a couple 3/8 stubs about 5" long of some carbons from, most likely the 70's, they came with the torch.
they worked way smoother, i'm assuming there must be a difference in the carbon grain size or the composition of the carbon and coating or both. i'm not exactly sure.

thanks for reading, i'll post tonight's work soon!!!!

 

[sniggler]

i finally got a decent picture of the TCA brazing repair...
View attachment 52580

this is the first pass across the face.
Being that i'm right handed, i feed the brazing rod in my left hand, similar way as to oxy/acetylene brazing.
I make a very small circle with the torch to heat, but not over heat...
It's a little tricky to keep the heat just right, but as you can see a 43 yr old dog can obviously learn a new trick.

if i can do it you can too!!!!
just don't try to use the DC Cutting/Gouging they are a PITA to use. my results on another warm up piece was disasterous.
i haven't tried uncoated carbon rods. but i'm thinking of trying some experimentation:thinking:

i actually used a couple 3/8 stubs about 5" long of some carbons from, most likely the 70's, they came with the torch.
they worked way smoother, i'm assuming there must be a difference in the carbon grain size or the composition of the carbon and coating or both. i'm not exactly sure.

thanks for reading, i'll post tonight's work soon!!!!

I never brazed with a carbon torch but I do a lot of carbon air arc gouge work shaving down large welds and gouging out welds for repairs it is very easy to shape stuff with an air arc gouging rig and it has the benefit of not putting a lot of heat into the work. I wonder if the air arc would work the same on the brazed area to shave it down.

bob