High-quality CAD model as a prerequisite for digitalisation of CNC machining process
Digitalisation and automation are currently being introduced to CNC machining to increase efficiency and reduce production costs. This trend can result in reduced quality of the final product, especially in CNC machining of molds with complex shapes, where additional manual interventions such as gri...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Graphical Models |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S152407032500030X |
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| author | Ivana Linkeová Jakub Müller Michal Stejskal |
| author_facet | Ivana Linkeová Jakub Müller Michal Stejskal |
| author_sort | Ivana Linkeová |
| collection | DOAJ |
| description | Digitalisation and automation are currently being introduced to CNC machining to increase efficiency and reduce production costs. This trend can result in reduced quality of the final product, especially in CNC machining of molds with complex shapes, where additional manual interventions such as grinding are often necessary. The research in this paper focuses on optimisation in the pre-production phase of the CAD model design. It is shown that the geometric properties of the CAD model, especially the quality of its continuity, significantly influence the resulting accuracy and quality of the machined surface. Increasing the CAD model continuity up to 3rd order automatically smooths the toolpath and improves the accuracy of the machined surface, and therefore the need for subsequent optimisations in the technological phase is also reduced.To investigate the effect of CAD model continuity on CNC machining accuracy, a new Continuity standard representing the continuity of freeform surfaces from 0th to 3rd order was designed and machined by 3-axis milling without any finishing operation. Based on measurements of the manufactured standard, in this paper it is proven that the increasing continuity of the CAD model increases the accuracy of the machining and, at the same time, eliminates the need for additional manual adjustments. |
| format | Article |
| id | doaj-art-c72f0c69e86e4bbe9649f7798b10f3c2 |
| institution | Kabale University |
| issn | 1524-0703 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Graphical Models |
| spelling | doaj-art-c72f0c69e86e4bbe9649f7798b10f3c22025-08-20T04:02:26ZengElsevierGraphical Models1524-07032025-09-0114110128310.1016/j.gmod.2025.101283High-quality CAD model as a prerequisite for digitalisation of CNC machining processIvana Linkeová0Jakub Müller1Michal Stejskal2Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Technical Mathematics, Karlovo nám. 13, 12135 Prague 2, Czech Republic; Corresponding author.Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Technical Mathematics, Karlovo nám. 13, 12135 Prague 2, Czech RepublicCzech Technical University in Prague, Faculty of Mechanical Engineering, Department of Production Machines and Equipment, Horská 3, 12800, Prague 2, Czech RepublicDigitalisation and automation are currently being introduced to CNC machining to increase efficiency and reduce production costs. This trend can result in reduced quality of the final product, especially in CNC machining of molds with complex shapes, where additional manual interventions such as grinding are often necessary. The research in this paper focuses on optimisation in the pre-production phase of the CAD model design. It is shown that the geometric properties of the CAD model, especially the quality of its continuity, significantly influence the resulting accuracy and quality of the machined surface. Increasing the CAD model continuity up to 3rd order automatically smooths the toolpath and improves the accuracy of the machined surface, and therefore the need for subsequent optimisations in the technological phase is also reduced.To investigate the effect of CAD model continuity on CNC machining accuracy, a new Continuity standard representing the continuity of freeform surfaces from 0th to 3rd order was designed and machined by 3-axis milling without any finishing operation. Based on measurements of the manufactured standard, in this paper it is proven that the increasing continuity of the CAD model increases the accuracy of the machining and, at the same time, eliminates the need for additional manual adjustments.http://www.sciencedirect.com/science/article/pii/S152407032500030XFreeform surfaceGeometric continuityCAD/CAMCNC machiningFreeform metrologyDigitalisation |
| spellingShingle | Ivana Linkeová Jakub Müller Michal Stejskal High-quality CAD model as a prerequisite for digitalisation of CNC machining process Graphical Models Freeform surface Geometric continuity CAD/CAM CNC machining Freeform metrology Digitalisation |
| title | High-quality CAD model as a prerequisite for digitalisation of CNC machining process |
| title_full | High-quality CAD model as a prerequisite for digitalisation of CNC machining process |
| title_fullStr | High-quality CAD model as a prerequisite for digitalisation of CNC machining process |
| title_full_unstemmed | High-quality CAD model as a prerequisite for digitalisation of CNC machining process |
| title_short | High-quality CAD model as a prerequisite for digitalisation of CNC machining process |
| title_sort | high quality cad model as a prerequisite for digitalisation of cnc machining process |
| topic | Freeform surface Geometric continuity CAD/CAM CNC machining Freeform metrology Digitalisation |
| url | http://www.sciencedirect.com/science/article/pii/S152407032500030X |
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