Quality Assurance for Hairpins

Each hairpin has a flexible structure and is coated with a sensitive lacquer layer. These characteristics create challenges for reliable tactile inspection. An automated ZEISS coordinate measuring machine equipped with a confocal light sensor or a laser triangulation optical sensor is one option for accurately measuring the hairpin shape and lacquer thickness.

Hairpin design is not defined by a CAD model alone, but is instead developed in numerous loops through bending parameter configuration. CAD models must be scanned and produced so as to evaluate finished hairpins in relation to a master pin. Fringe projection and laser triangulation generate high-resolution point clouds of the hairpins, which ZEISS REVERSE ENGINEERING software then quickly turns into high-quality CAD models.