Industrial Electronics

New optical 3D metrology cell saves time and money

25 February 2019

Thanks to optical 3D metrology, ZF Fonderie Lorraine, a metal processing company in France, has improved its measuring capacities for casting while also optimizing all manufacturing processes.

In January 2018, ZF Fonderie Lorraine introduced the automated ATOS ScanBox 4105, a measuring cell featuring the ATOS Core sensor from GOM to obtain an overview of the global deformations of blanks when removed from the mold. This allows the company to respond to any problems while parts are still unfinished, a step that, until today, was not possible using three-dimensional tactile machines.

The ATOS Core 500 is the sensor in GOM’s product range designed to measure small and medium-sized cast blanks. It projects a network of encoded fringe patterns, specific to GOM, onto the surface of the object to be measured. In each measuring position, the cameras capture the projected patterns in a manner akin to the human eye. GOM’s algorithms exploit the registered images in a live process. The triple scan technology consists of combining stereo measurement with two accompanying measurements via triangulation of the cameras on the right and left. This unique technology offers a high level of optical accessibility — a major benefit when dealing with the complexity of injection-molded die-cast aluminum parts with a bright finish. The projection unit of the ATOS Core system is based on GOM’s Blue Light Technology. The blue fringes of the LED projector are observed with bandpass filters, allowing light-based interference to be eliminated. Short measuring times are achieved due to its powerful light source.

ATOS systematically supplies a full-field point cloud that characterizes the part in its entirety. The measuring data can be analyzed immediately and compared directly with the CAD data. Dimensional deviations are thus identified at once, resulting in both time and cost savings throughout the production process.

The full ATOS Core 500 application note is available here.

To contact the author of this article, email engineering360editors@globalspec.com


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