How to model an icosahedron with Inventor
I create a surface model and use the frame generator. 3D curves help me to identify the body which is constituted of 20 unilateral triangles.
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Step 1: analyze the platonic body
20 unilateral connected triangles
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Step 2: develop a 3Dsketch of a triangle
after drawing a pentagon in a 2D sketch draw a unilateral triangle, vertex in that same axis as the centre of the polygon. length is arbitrary.
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Step 3: surface patch and circular pattern
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Step 4: extrude surface
circle is coincident with pentagon.
create 3Dsketch of unilateral triangle. vertex sits on cylincrical surface.
surface patch and circular pattern.
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Step 5: combine and mirror
stitch all 10 surfaces
create midplane
mirror component
rotate at 36°
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Step 6: combine and start assembly
use a weldment assembly
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Step 7: pick profile
a pipe, or whatever you like
use miter for the joints
...enjoy
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Step 8: watch video