ANR YOUNG RESEARCHER PROJECT: Towards optimizing machining precision

Towards optimizing machining precision   

Fabien Viprey, lecturer and researcher in the high-speed machining team at LaBoMaP on the Cluny campus, is coordinating the ANR JCJC Intégration project on the geometric characterization of machine rotation axes. The funding will enable the creation of a doctoral thesis, three research-oriented master's degree internships, and the acquisition of equipment.

This project brings together LaBoMaP, the University Laboratory for Research in Automated Production (more information), an expert in geometric modeling of products and processes, and the National Metrology and Testing Laboratory (more information), which guarantees measurement traceability.  

During his thesis work, Fabien Viprey conducted research on the geometric modeling of 5-axis machine tools. "This approach made it possible to characterize the geometry of the machine's translation axes and the assemblies between kinematic elements, while ensuring the traceability of measurements and a level of uncertainty compatible with the targeted tolerances. The geometric error in the machine's working volume was reduced to 95% with an average residual of 8µm."This work was based on the creation of a hardware standard (measurement system): the Multi-Feature Bar. This standard is now recognized by national metrology institutes such as the PTB in Germany and the NPL in the United Kingdom.

With the Integration project, we are moving on to the next stage by focusing on rotational movements, which are more complex to study than translational movements.

The LaBoMaP team will design and test a new hardware standard, this time adapted to rotary movements and capable of further refining machining (more information).