Hamza Oza

Mechanical Flower Box

Sketches

Initial sketches were created as part of the ideation process. Mechanisms that could be miniaturised were focused upon so that the final product could be hand held. Care was taken to ensure the assembly had a single user input to aid ease of use.

flower-sketch-1
flower-sketch-2
flower-sketch-3

CAD Model

After the ideation process was complete, the design with the most promise was transferred to SolidWorks to develop CAD models.

This uses a reverse umbrella mechanism to allow the flower to open and close, giving the user the illusion that the flower is blooming from a bud.

flower-cad

Then the petals were created using surfacing techniques to provide a smooth continuous shape. The final model has 2 layers of petals, with a cam input mechanism to make the stem move up and down.

Motion Simulation

A motion simulation was conducted to ensure that it would behave as intended. Through this simulation, the forces experienced by the design were collected to help inform the stress simulation.

stem-y-displacement

Stress Simulation

The stress simulation verified that the design is capable of performing under normal operation as intended.

petal-stress-simulation

Design Iteration

The simulation studies showed the product was viable and could be made as initially designed. However, the stress simulation also showed the cam box supporting the petals was not experiencing large forces. Therefore, the frame of the box was remodelled into a conic shape to resemble a flower pot.

The previous design had a mass of 175g whereas the redesign has a mass of 124g. This reduction in mass saves 30% material in a way that does not compromise functionality. Creating a more sustainable design.

Results

The project was successfully submitted and awarded a first overall. Praise was given to the redesign and making use of results from the simulation to make appropriate design refinements.