Project brief
This proposed fixture would locate a family of small machined parts for repeatable dimensional inspection. The concept would separate datum location from clamping so the force path and constraint strategy remain easy to review. A modular base with replaceable pins, support pads, and clamp brackets would allow controlled changes between part variants. The CAD work would include tolerance considerations, tool access, identification marks, and manufacturing drawings for the fixture elements. A measurement study would be planned around repeated loading and unloading of a reference part. The intended outcome is a reviewable fixture architecture and inspection method, not a claim of established gauge repeatability or accuracy. All achievable tolerances would depend on fabrication and the selected measurement equipment.
Design concept developed for this portfolio. The diagrams describe the proposed system; implementation and testing are part of the validation plan.
The engineering challenge
Locate related part variants consistently without overconstraining them or obstructing measurement access.
Engineering approach
- Choose functional datums and a constraint strategy.
- Separate locating contacts from clamp reactions.
- Parameterize replaceable fixture elements.
- Plan repeated reference-part measurements.
Validation plan
- Repeat loading and measure the same reference surfaces.
- Check that clamp force does not visibly distort the part.
- Compare fixture-element dimensions with the drawing baseline.
Concept scope
- Modular datum base
- Replaceable locating pins
- Accessible support pads
- Part-variant identification
- Measurement access review
Software & engineering tools
FreeCAD, 2D manufacturing drawings, Python, Dial indicator