Quote:
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Originally Posted by KenWittlief
Chinese Screwdriver?!
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Good guess.
Quote:
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Originally Posted by Alan Anderson
1: chisel tip?
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That's the one I was looking for.
Quote:
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Originally Posted by Bill Hancock
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This one is the probably the best. Note that the mathworld link says there is an infinite family of shapes that satisfy the challenge. The one with minimum volume has triangular cross sections.
I think the mimimum volume cork plug can be (approximately) modelled in Inventor as a loft from a thin rectangle one inch long by 1/1000th inch wide to a one inch diameter circle. The rectangle is sketched on a plane one inch from the circle and the long centerline of the rectangle projects onto the circle's diameter. I used a model made this way to generate an STP file from which we made a "minimum volume" cork plug on a Viper SLA machine at Emerson.
Of course, Alan's procedure is more practical. Just round the elliptical edges a bit and you end up pretty close to the minimum volume.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
One of the most important resources of all: [URL="http://frc-manual.usfirst.org/"]The Manual[/URL] - lorem3k [more] 
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