Mebfab
Diamond
- Joined
- Jun 7, 2003
- Location
- Mebane North Carolina USA
I have to join two sheets of copper. Lapped over eachother. Think of a book lying on another book. Bottom book is 6x9. Top on 5x7. They have a 3.5" square hole cut through both. 1/4" thick each.
I brazed the outside together with silver solder and borax type flux, using a rosebud oxy acetylene torch.
Inside absolutely would not go together. Get it hot, melt the rod. It just sits on top. So clean it. reapply flux and do it again. Nothing. Grind to clean metal, endmill, etc. No difference. Bigger torch tip, smaller tip. Nothing.
USed the tig torch. Nothing.
Tried some unkown brazing rod with white flux. No luck
Any thoughts???
I brazed the outside together with silver solder and borax type flux, using a rosebud oxy acetylene torch.
Inside absolutely would not go together. Get it hot, melt the rod. It just sits on top. So clean it. reapply flux and do it again. Nothing. Grind to clean metal, endmill, etc. No difference. Bigger torch tip, smaller tip. Nothing.
USed the tig torch. Nothing.
Tried some unkown brazing rod with white flux. No luck
Any thoughts???