Brazing a weight lifting plate

[BeezFun]

Trying to Ox/Ac braze collar to weight lifting plate shown in photo. Using flux coated bronze rod. Makes a big mess but seems to hold ok. Surprisingly the plate seems to take the braze better than the little collar. I ground both down first so they're clean. I'm using a large tip on my torch, it gets things hot but I don't seem to be able to control the flow of the material. Any help appreciated.

 

[deereman75]

How I learned to do it is to heat the base metal to a dull cherry red, and let the heat of the base metal melt the rod, not the torch. If you have the metal glowing bright red or orange, it is too hot, if you have to melt the rod with the torch, it is too cold. Think of it more like soldering then welding.

 

[BeezFun]

How I learned to do it is to heat the base metal to a dull cherry red, and let the heat of the base metal melt the rod, not the torch. If you have the metal glowing bright red or orange, it is too hot, if you have to melt the rod with the torch, it is too cold. Think of it more like soldering then welding.

Maybe that's why the plate takes the rod better, it's not so hot. I have one more to do, will try again. I don't have a rosebud, maybe that would be better.

 

[deereman75]

Maybe that's why the plate takes the rod better, it's not so hot. I have one more to do, will try again. I don't have a rosebud, maybe that would be better.

I would just use a big welding tip for that, if your biggest welding tip wont get it hot enough, in a reasonable amount of time, just use a cutting tip, but dont push the cutting leaver.

 

[Short Game]

Hot enough to melt the bronze is hot enough. I love brazing stuff. It can fix a lot of things.

 

[weldermike]

Oh deereman, you are such an expert on fabrication! I find your posts very entertaining, keep practicing with your 6010's and your ac welder plugged into your clothes dryer outlet.

 

[deereman75]

Oh deereman, you are such an expert on fabrication! I find your posts very entertaining, keep practicing with your 6010's and your ac welder plugged into your clothes dryer outlet.

I actually have done a fair bit of brazing, before I got a welder. I have never used a 6010 rod with an AC welder, the 6010 rod is a DC only rod, and would not work at all with my tombstone. As for the dryer outlet, I have finaly wired the shop with 220v power (on its own circut), the clothes dryer was just for until I wired the 220v. I have probably got a better set up then what you did when you were 14, I already have a tombstone, and a $700 air compressor, and a whole wack of power tools. Also, I didnt see you giving any advice on the brazing, if you post, post something helpful, not something that has nothing to do with the question, and only insults people.

 

[BeezFun]

I was using my biggest welding tip, cranked up the flame quite a bit more on the second one and that seemed to help. I also did better preparation and fluxed the surfaces before I started. I think the plate was just such a huge heat sink that it was very difficult to keep it hot enough over a larger area without melting the parent material in one small spot. Anyway, the job's done now.

 

[deereman75]

I do think that the huge mass of cast iron was making it harder to braze, glad you got it done. Why did you have to braze flanges onto the weights anyways?

 

[weldermike]

Deereman if you are 14 yrs old I do apologize, I did not know you are a up and comer. Glad too see the younger generation eager to learn the trade! Sorry bud! I feel bad now and may have to donate you a dc machine!