MECHANICAL DESIGN: CNC FIXTURE & CLAMPING SYSTEM

CAD design, geometric optimization, and rapid setup mechanism for CNC milling operations.

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THE CHALLENGE

Designing a lightweight, modular clamping system for a desktop CNC mill to secure parts from the sides without blocking the top surface or taking up unnecessary workspace.

HOW

CAD Modeling in Siemens NX: Designed a grid baseplate with locating holes, a 90° reference corner stop, and eccentric cam clamps.

Eccentric Cam Clamping: Created teardrop-shaped clamps that apply strong lateral pressure as they rotate, keeping the entire top of the part clear for machining.
Tool-Free Pin Setup: Used slide-in pins instead of slow threaded bolts, allowing clamps to be moved across the grid in seconds.
Material Choices: Used MDF for a flat, stable baseplate and durable plywood for the clamps to provide maximum grip and wear resistance.

THE RESULTS AND REDESIGN

Zero Tool Collisions: Side-clamping eliminated the risk of the milling bit hitting clamps during operation.

Fast Setup: Drop-in pins made mounting and swapping parts much faster than standard screw systems.

PORTFOLIO