percer des trous carrés, un outil | ENSCI – FabLab/FabFlex

By: petrevski

04-05-2010

work in progress

percer des trous carrés, un outil

forum expliquant la fabrication d’un tel outil :
http://bbs.homeshopmachinist.net/showthread.php?t=92&page=4

le brevet de 1918 :
http://books.google.com/patents?id=mPJcAAAAEBAJ&zoom=4&pg=PA49#v=onepage&q&f=false

la math, explication :
http://en.wikipedia.org/wiki/Reuleaux_triangle

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