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Development of innovative algorithms for the generation of machining toolpaths
Rapid duplication of complex shapes
The process of the rapid duplication of complex shapes resulting from digitizing has been greatly improved through a systematic approach which, starting from a visibility map, enables collision-free machining and the minimization of geometric overlapping discrepancies in 5-axis positioned milling.
The method was validated on the copying of natural stone artwork using robotized machining in cooperation with the Lithias company.
Currently, the method is the subject of new developments to introduce continuous 5-axis finish milling from a point cloud without visible boundaries.
The method was validated on the copying of natural stone artwork using robotized machining in cooperation with the Lithias company.
Currently, the method is the subject of new developments to introduce continuous 5-axis finish milling from a point cloud without visible boundaries.
5-axis flank milling of non-developable surfaces
In order to ensure the quality of machined surfaces while minimizing manufacturing times, we studied the introduction of a fluidity criterion based on the strain energy of 5-axis flank milling trajectories.
Indeed, seeking optimal tool postures may result in oscillations in the orientation of the tool axis, leading to jerky tool movements which, in an HSM context, may leave marks on the machined part. The proposed approach consists in generating the smoothest toolpath which remains compatible with the geometric tolerances for the part.
This approach has been industrialized and implemented in TopSolid'CAM.
Indeed, seeking optimal tool postures may result in oscillations in the orientation of the tool axis, leading to jerky tool movements which, in an HSM context, may leave marks on the machined part. The proposed approach consists in generating the smoothest toolpath which remains compatible with the geometric tolerances for the part.
This approach has been industrialized and implemented in TopSolid'CAM.
Automated polishing
Achieving complex shapes, such as moulds or medical prostheses, with a minimum of geometric defects requires superfinishing operations or even mirror surface finishing.
Our research work contributes to the control of the automated polishing process while ensuring the geometric quality of the machined parts. In order to do that, we developed two software systems:
- A simulation program for material removal based on a contact model and an abrasive disk wearing model,
- A trochoidal polishing toolpath generation program.
Équipe de rattachement
Publications
- Publications sur 5 ans (depuis 2008)
- Publications antérieures (jusqu'à 2007)