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.

Oticon wanted dimensioning and quality assurance of their component "the hook". The tiny plastic part, which measures 15 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.

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.

CT scanning

CT scanning
CT scanning is x-ray scanning in 3D and is also called computer tomography. The technology is ideal for part measurement and material analysis, as both internal and external geometries are documented. Read more