Fritz: All Fritz/All Fritz.zip/All Fritz/FILES/BUSITION/OXYTUTOR.LZH/39

Text File | 1990-11-11 | 3KB | 479 lines

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Practice #3~
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Cut  a  couple  of  sections  of
bicycle  tubing  about  6"  long
each.  Miter  one to fit against
the  other  at  a  right  angle.
The mitering should be  accurate
enough  that  there  is  no  gap
larger than  .030".  Braze  them
together.~
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Turn down  the  gas  velocities.
Now, just as if you were welding
with brass,  using a small torch
motion,  and working in sections
around  the   intersection  from
right to left, weld bronze beads
over the intersection. Obviously,
you  don't  want  to  use enough
heat to melt the steel, but melt
the underlying brazing  so  that
the new brass beads adhere. Done
properly, this enlarges the area
of contact and greatly increases
strength. This is called  fillit
brazing.

~

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     When cool, try to tear your
practice pieces apart to see how
strong your brazing is.~