Stable Table!
Stable Table! is a project developed for a mechanical design class, where the objective was to create a practical solution to an issue observed in daily life. Our team identified a problem with lecture halls, such as Bailey Hall, where tables are not provided during exams, leading to discomfort and inefficiency. In response, we designed a portable, attachable table that is stable, lightweight, and optimized for these environments.
The engineering principles applied were rooted in concepts from our statics class, ensuring the table could handle loads up to 10 lbs while maintaining a low profile and ergonomic design. Our iterative design process included prototyping with laser-cut acrylic and wooden components, addressing challenges like deflection and material failure, and refining the structure to meet performance criteria. The result is a functional, portable desk tailored for lecture hall use, balancing durability, usability, and cost efficiency.
Design Process
The design choices behind Stable Table! were driven by a balance between functionality, user needs, and practical constraints. Our primary focus was to create a table that was portable, stable, and easy to attach to lecture hall chairs. The design aimed to meet several quantitative goals, including:
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Withstanding a maximum applied weight of 10 lbs without excessive deflection.
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Fitting securely onto Bailey Hall lecture chairs with minimal wobble.
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Maintaining a flat and level surface with a tolerance of 0 ± 5º for ergonomic usability.
At the same time, we had to navigate a set of constraints that shaped our approach:
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The product had to be cost-efficient, making use of readily available materials like laser-cut acrylic and wood.
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It needed to be lightweight (under 5 lbs) for portability.
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The design and assembly processes had to rely on tools and resources accessible within our university’s facilities.
Manufacturing
The manufacturing process for Stable Table! centered on creating a cost-efficient, stable, and lightweight product using materials that balanced functionality with aesthetic appeal.
We chose laser-cut acrylic for the armrest sleeve and backing plate because of its rigidity, precise manufacturability, and clean, professional appearance. Acrylic also allowed us to achieve tight tolerances for the sleeve's fit onto the armrest, though its brittleness required careful drilling and assembly to avoid cracking.
For the desk plank, we selected wood due to its lightweight nature, smooth surface for writing, and ease of customization. To ensure a secure bond between the wood and acrylic components, we used JB Weld and bolted connections, prioritizing both adhesion and durability.
