Quality control and dimensioning according to the GD&T system

Oticon A/S uses CT scanning for investigation of hidden geometries and dimensioning of geometric tolerances.

Oticon A/S is among the world's leading manufacturers of hearing aid and have high quality standards for their products.

Problem
Oticon wanted dimensioning and quality assurance of their component "the hook". The tiny plastic part, which measures 150 mm, was to be approved before start up of production.

Zebicon used computer tomography (CT scanning) for documentation of the hook and afterwards compared the scanned data to the CAD part. Subsequently, the inner tube was documented, and GD&T was performed according to the 2D specification.

Solution
The result of the comparison between CT scan and CAD was a color plot, which revealed a displacement of the inner tube and minor interior flaws.

Contact

Kim D. Andersen
Project manager

+45 4196 4953
kda@zebicon.com