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"Michael Horowitz" <mhorowitREMOVE_THESE_CAPS@cox.net> wrote in message
news:iqllk1d4ema58ign713odere078e41fles@4ax.com...
> I am practicing with an Ox/Ac rig; Using mild steel (.035).
> Got a little cocky and decided to try a patch on tubing. With a
> rosette weld as well as along the edges.
>
> Well, I chased that hole all over the patch! burning it and filling
> and burning and filling! The patch obviously getting hotter than the
> base metal. Tried different angles, nothing successful. Any
> suggestions are appreciated.
>
> Had the same problem along the first edge. Then I wised up and clamped
> a 'chill bar' on the patch. Worked like a charm; however, I cannot see
> an experienced welder stopping for each side and reclamping the 'bar.
>
> I am using 2psi of both gases, and a blowpipe tip with an opening
> appropriate for metals .037 thick.
>
Less heat, possibly less Oxy. Does your flame have a feathered cone? Might
need to hold the flame a bit further away, and come off the area with the
torch when it starts getting too hot.
--
Jim in NC
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Re: Problem with rosette welds
