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W3 - CAD

Assignment: Model (draw, render, animate, simulate, ...) a possible final project, and post it on your class page with original 2D and 3D files.


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Original idea

For this assignment I chose to redesign an old project I made 4 years ago. The project was about designing a chair made of plywood slices, with no glued or screwed joints. The original idea considered to design a chair out of a sphere by volume substraction turning the chair into a 360 rotation rocking chair. The first model was design with Creo Parametric software and rendered with Keyshot. Here there are a couple of renders of the original idea:





Mockup pictures

After designing the CAD model, I built the rocking chair in 5mm Plywood boards by cutting the pieces with a CNC machine. These are some pictures of the original mockup:




3D model in Fusion 360

For the redesign of the model I used Autodesk Fusion 360 software. First you can see a side section sketch with the dimensions of the chair considering first its ergonomy.

3D model structure in slices

3D model turned into Slicer plugin for Fusion 360. This way the model can be transformed into a sliced structure. The properties of the slices as well as its distribution along the cutting panels are calculated by the plugin software.

Section + center of mass calculation

Its spherical base will demand a center mass calculation to guarantee its stability. Center of mass point and middle-section of the model are shown in the following picture:

Slices distribution for laser cutting

This layout shows the distribution of all the pieces in 3 plywood panels (244x122cm). The distribution of the pieces was readapted in Adobe Illustrator to condense and reduce as much as possible the space between pieces.