Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10226529 | Precision Engineering | 2018 | 7 Pages |
Abstract
In order to analyze the achievable measurement uncertainty with the holistic approximation approach for an object geometry composed by three-dimensional base elements (cylinder, torus, plane), the method is applied to determine the geometric features of micro deep-drawing dies. For verification, the measured geometry of the object is simulated including uniformly distributed noise within a range of ±2.5â¯Î¼m. As a result, the determined radius of the cylinder (defined to 412â¯Î¼m) has a standard uncertainty due to random errors below 11â¯nm and an uncertainty due to systematic errors less than 1.1â¯nm. Furthermore, real tactile measurement data are evaluated to validate the holistic approximation. In comparison to certified analysis software, which requires a manual segmentation, the results show differences below 0.25â¯Î¼m for the cylinder diameter. The increased measurement deviations are caused by assumptions of the model-based evaluation, which is essential for the automated data processing. However, the achievable uncertainty qualifies the holistic approximation for a robust and automated evaluation of geometric tolerances in the field of micro-production.
Related Topics
Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
Axel von Freyberg, Andreas Fischer,