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In the machining process, the shape and treatment of the cutting insert play fundamental roles. This article explores the influence of reverse geometric modelling methods on the accuracy of CAD models for cutting inserts. The cutting inserts were digitized using a GOM ATOS II Triple Scan optical 3D scanner with a measuring volume of MV100, ensuring highquality digitization. The output, a scan (mesh) in STL format, served as input for reverse geometric modelling in the designated software. The resulting CAD models were then employed to simulate machining processes. Various reverse engineering methods were utilized in the experiment, including internal, middle, and external fitting with a specific focus on surface wrapping. Three different software platforms (referred to as A, B, and C) were used for reverse geometric modelling. Comparative analysis of CAD models post reverse engineering was conducted to assess accuracy, utilizing colour deviation maps and longitudinal measurements of IC and L deviations. From the attained results of the conducted experiment, it can be deduced that the difference between the various surface attachment methods (namely, the external, middle, and internal methods) is observable but not significant. Similarly, the difference between the software programs A, B, and C is also observable. Among these mentioned methods, the middle attachment method appeared to be the most accurate; hence, the authors recommend its utilization in reverse geometric modelling. Optimal results were selected for producing cutting inserts tailored to various microgeometries and tool angles. Subsequent testing of the cutting inserts in the machining process will involve measuring their cutting forces. The results of this experiment provide useful information regarding the impact of various methods of reverse geometric modelling through surface wrapping on the resulting accuracy of CAD models. Although the subject of the experiment was in the field of machining, the results of the experiment can be applied to all types of models that are pre-modelled using surface wrapping. Several authors have dealt with reverse geometric modelling, but none of them have addressed specific methods of surface wrapping in reverse modelling of cutting inserts.
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