Mechanical Design Analysis: OpenSCAD project & 3D printing

The core concepts of Mechanical Design analysis are the Degree of Freedom (DoF), Typs of Gear, Energy conversion, Gear force transmission etc. DoF of a mechanical system is the number of independent parameters that define its configuration.  There are many examples of 6 types of DoF of both Translation & Rotation around us for exploring. We can also find the three basic types of gear such as Helical, Bevel, Rack & pinion in , & respectively. So the importance and applications of mechanical design analysis is everywhere.

I built prototypes using cork sheet and toothpicks to create different DoFs and apply it in a simple mechanical structure. The rapid prototype building is a skill which helps a lot to actually visualize our ideas. Building a prototype also ensures the final physical structure, stability and the approximations about the project. It helps to make necessary changes in the planning before it’s too late.

I also made OpenSCAD project which is basically an example of CSG tree (Constructive Solid Geometry Tree) generation. There are multiple cubes, cylinder and spheres. I applied difference(), translate(),  rotate(), linear_extrude() etc functions.  Then the code has to be compiled and built.

OpenSCAD project after being compiled

OpenSCAD project after being compiled

Then the .scad project has to be rendered with CGA ( Color Graphics Adapter).

Orthogonal preview showing its scale. edge and axes

Orthogonal preview showing its scale. edge and axes

Project after rendering

Project after rendering

Rendered wireframe top view

Rendered wireframe top view

Then for 3D printing, the project has to be exported as a .STL (STereoLithography) file format.

Special regards to Tamanna Islam Urmi, studying in Mechanical Engineering, MIT.

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