How to model an icosahedron with Inventor

Jens Nielsen

20 Apr, 2022 07:20 AM

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.

1. Step 1: analyze the platonic body

   

   
   

   20 unilateral connected triangles

2. 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.

3. Step 3: surface patch and circular pattern

   

   
   

   
   

4. Step 4: extrude surface

   

   
   

   
   

   
   

   circle is coincident with pentagon.

   create 3Dsketch of unilateral triangle. vertex sits on cylincrical surface.

   surface patch and circular pattern.

5. Step 5: combine and mirror

   

   
   

   stitch all 10 surfaces

   create midplane

   mirror component

   rotate at 36°

6. Step 6: combine and start assembly

   

   use a weldment assembly

   
   

7. Step 7: pick profile

   

   
   

   a pipe, or whatever you like

   use miter for the joints

   

   ...enjoy

   
   

8. Step 8: watch video