Explosive deburring is done all the time commercially. Put parts in a
chamber, add natural gas or propane, spark ignition, flash the flame out
a venting port.

I've toured this plant, they have all sorts of ways to get all the burrs.
http://www.arrowcryo.com/

RWL wrote:

On Sat, 22 Jan 2005 18:51:46 GMT, "Wayne Lundberg"
wrote:


Back when I was a practicing Mfg. Eng. at Solar Turbines I did extensive
research into deburring the inside hole made in tubing. I failed to find
anything really earth-shaking.


Perfect choice of words for the method I'll describe.


Anybody have any proven success with this kind of problem?


I was told about this by an old Swiss toolmaker who described it to
me. I never saw it in action. They needed to deburr some copper
parts they were making. They made up something they called "the
bomb". Essentiallly a big metal box. They put the parts inside along
with fuel (gasoline?) vapor and touched it off. The flash burned off
the burrs. We live in a pretty rural area and his business was way
back in the woods where most people didn't know it existed. In the
60's (I think that was the era) he was making parts for the cameras in
the U2 spy planes. He had to work to precision somewhere in the
millionths. The shop is across the river and about a mile from a
railroad yard as the crow flies. The trains induced vibrations in the
work which kept him from getting the precision he needed. He had to
do the work in the wee hours from Saturday through some time on Sunday
since that's the only time they weren't shifting trains around. At
any rate, the method certainly was earth shaking. I can't prove he
wasn't pulling my leg, but I don't think so; he just didn't impress me
as being that kind of guy. He's been dead for a number of years now
so I can't inquire about the bomb for you. NO - he didn't die in an
explosion.

Bob Lamparter


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