5 ms·

What's "filleting"?

by eps 4y ago

What's "filleting"?

thrwawy74 4y ago
I believe this command found in AutoCAD: https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2021/ENU/AutoCAD-Core/files/GUID-64F8B700-23B3-4BD6-8C03-66121AA13E8F-htm.html https://knowledge.autodesk.com/support/autocad/learn-explore...
exmadscientist 4y ago
Rounding the corners of things. Imagine a perfect cube. The edges will be very, very sharp, and this is bad for any number of obvious reasons. To fillet the edges is to round them off: now the cube is much easier to handle. These are "outside" fillets, and you could perhaps make them with a router bit. There are also "inside" fillets (say you "drilled" a perfectly cylindrical hole partway into the cube; an inside fillet would be along the circular bottom edge of the hole), which can't be made after the fact (to do so would involve adding material). The geometry only gets more complex from there: most things aren't cubes or cylinders! Fillets are at once extremely simple, extremely complicated, and extremely important. They are siblings to chamfers, which are the same idea but instead of being round just involve breaking the edge. You could chamfer the edge on that hypothetical cube with a single touch from a sander or (big) file. Fillets require more care.
bvrmn 4y ago
To add to explanation: inner fillets relax material stress in the corners and make final produced thing more durable and strong. You pretty much can't use CAD without fillets for real industrial applications.
dcminter 4y ago
Sibling comments address your question, but it occurred to me that this anecdote (which you may well already know) from Andy Hertzfeld illustrates why fillets are a vital feature: https://www.folklore.org/StoryView.py?story=Round_Rects_Are_Everywhere.txt https://www.folklore.org/StoryView.py?story=Round_Rects_Are_...
ur-whale 4y ago
>What's "filleting"? Make hard edges soft by replacing them with a surface whose cross-section by the plane normal to the hard edge is a circle tangent to the the two surfaces connected by the edge. Somewhat easy when hard edges are simple straight lines connecting planes, but trickier when multiple hard edges meet at a vertex at arbitrary 3D angles or when the hard edge is a 3D curve.
deleted 4y ago
[deleted]

What's "filleting"?

by eps 4y ago

What's "filleting"?

I believe this command found in AutoCAD: https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2021/ENU/AutoCAD-Core/files/GUID-64F8B700-23B3-4BD6-8C03-66121AA13E8F-htm.html https://knowledge.autodesk.com/support/autocad/learn-explore...

exmadscientist 4y ago

Rounding the corners of things. Imagine a perfect cube. The edges will be very, very sharp, and this is bad for any number of obvious reasons. To fillet the edges is to round them off: now the cube is much easier to handle. These are "outside" fillets, and you could perhaps make them with a router bit. There are also "inside" fillets (say you "drilled" a perfectly cylindrical hole partway into the cube; an inside fillet would be along the circular bottom edge of the hole), which can't be made after the fact (to do so would involve adding material). The geometry only gets more complex from there: most things aren't cubes or cylinders! Fillets are at once extremely simple, extremely complicated, and extremely important. They are siblings to chamfers, which are the same idea but instead of being round just involve breaking the edge. You could chamfer the edge on that hypothetical cube with a single touch from a sander or (big) file. Fillets require more care.

bvrmn 4y ago

To add to explanation: inner fillets relax material stress in the corners and make final produced thing more durable and strong. You pretty much can't use CAD without fillets for real industrial applications.

dcminter 4y ago

Sibling comments address your question, but it occurred to me that this anecdote (which you may well already know) from Andy Hertzfeld illustrates why fillets are a vital feature: https://www.folklore.org/StoryView.py?story=Round_Rects_Are_Everywhere.txt https://www.folklore.org/StoryView.py?story=Round_Rects_Are_...

ur-whale 4y ago

>What's "filleting"? Make hard edges soft by replacing them with a surface whose cross-section by the plane normal to the hard edge is a circle tangent to the the two surfaces connected by the edge. Somewhat easy when hard edges are simple straight lines connecting planes, but trickier when multiple hard edges meet at a vertex at arbitrary 3D angles or when the hard edge is a 3D curve.

deleted 4y ago

[deleted]