MAE 2250
MAE 2250 is an introductory CAD and machining class offered at Cornell University. I produced several projects for this class, including a CAD and animation of a Reuleaux Machine, and a design for a water pump.
Reuleaux Machine
The first major assignment for the class was to model and create an accurate simulation of the motion of one of the machines designed by Franz Reuleaux using the Fusion360 CAD software. The machine I chose, labeled Q7 in Cornell's collection, was a design for a shield gear. The teeth of the gears are located on the side of the gear, rather than around the circumference as with a traditional gear, which allows the pin shaped teeth on the larger gear to pass around the leaf shaped teeth of the smaller gear. Since we were not provided direct access to the machines, all dimensions had to be approximated using the apparent size relative to the overall size of the machine, for which dimensions were provided. The exact profile of the leaf teeth was determined through trial and error using the built-in interference detection in Fusion360. The motion was modeled using a combination of contact sets and motion studies.
Water Pump
The capstone project for the class was to design a water pump that could generate a constant flowrate of at least 1 liter per minute while being powered by a single shaft. To meet these specifications, my team chose a dual piston scotch yoke design. The dual piston design was chosen to ensure the flow rate requirements were met, as well as to generate a more consistent flow rate, as the flow rate of a single piston design would be a sinusoidal function, with the functions of the two pistons being 180 degrees out of phase.