Roberto Meneghello
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View article: A numerical approach to compute statistical assembly shift for patterns of fits: application to tolerance stack-up
A numerical approach to compute statistical assembly shift for patterns of fits: application to tolerance stack-up Open
This study introduces a numerical methodology for computing the statistical assembly shift in patterns of fits, addressing scenarios with variable numbers of elements and scrap caused by assembly failure. Using Monte Carlo simulations, the…
View article: Methodological Approach to Accuracy Assessment in CAD-CAM Mandibular Reconstruction
Methodological Approach to Accuracy Assessment in CAD-CAM Mandibular Reconstruction Open
BACKGROUND. Assessing accuracy in CAD-CAM mandibular reconstruction poses significant challenges but is essential for ensuring reliable outcomes. Existing methods are often operator-dependent, lacking repeatability and reproducibility. PUR…
View article: Functional geometric characterization of lifting airfoil: An ICP based metrological approach
Functional geometric characterization of lifting airfoil: An ICP based metrological approach Open
This paper presents a novel metrological approach for the functional geometric characterization of lifting airfoils, utilizing an Iterative Closest Point (ICP) algorithm to assess deviations in camber, thickness, and form. Traditional geom…
View article: Optimizing Product Design Through Linking Design Variables for Cost-Effective Manufacturing
Optimizing Product Design Through Linking Design Variables for Cost-Effective Manufacturing Open
In product design and development, achieving the desired performance requires meeting specific product requirements within defined boundaries. These requirements are encapsulated in the Product Definition Dataset, which consists of two key…
View article: Enhancing tolerance stack-up analysis with variable-dependent admissible limits
Enhancing tolerance stack-up analysis with variable-dependent admissible limits Open
This work introduces the concept of variable-dependent admissible limits for tolerance stack-up analysis, where limits adapt based on geometrical and non-geometrical variables. Unlike traditional methods that assume fixed limits, the propo…
View article: Occlusal teeth surface accuracy of milled complete dentures: a comparison between different manufacturing techniques
Occlusal teeth surface accuracy of milled complete dentures: a comparison between different manufacturing techniques Open
The monolithic milling method exhibited significantly superior accuracy compared to the oversize process (P < .05). Additionally, the Reference Point System (RPS) metrological method proved more reliable than the best-fit method for compar…
View article: Methodological Approach to Accuracy Assessment in CAD-CAM Mandibular Reconstruction
Methodological Approach to Accuracy Assessment in CAD-CAM Mandibular Reconstruction Open
INTRODUCTION: Assessing accuracy in CAD-CAM mandibular reconstruction poses significant challenges but is essential for ensuring reliable outcomes. Existing methods are often operator-dependent, lacking repeatability and reproducibility. T…
View article: Design for assembly principles applied to deformable parts, a natural frequency based methodology for interfaces design
Design for assembly principles applied to deformable parts, a natural frequency based methodology for interfaces design Open
In this paper, a possible application of the DfA (Design for Assembly) principles to deformable parts is proposed. The efficiency of an assembly is expressed with the DfA index, which is influenced by the number of parts compared to the “m…
View article: Tolerance Specifications Management Integrated into the Product Development Cycle
Tolerance Specifications Management Integrated into the Product Development Cycle Open
In tolerancing activities focusing on the allocation of geometrical tolerances, many critical issues originate from the non-optimal assignment of responsibilities among the organization units involved. This paper aims to depict relations b…
View article: A second-order tolerance analysis approach to statistical virtual assembly for rigid parts
A second-order tolerance analysis approach to statistical virtual assembly for rigid parts Open
Virtual assembly has become a popular trend in recent years and is used for various purposes, including selective assembly and adaptive tooling. Monte Carlo approaches based on Finite Element Method (FEM) simulations are commonly used for …
View article: Microstructure, distortion and residual stress investigation in a bio-inspired welding pattern
Microstructure, distortion and residual stress investigation in a bio-inspired welding pattern Open
In Nature, when two surfaces are bonded, the joining interface usually follows a structurally optimized non-linear pattern, like cranial sutures. This distinctive characteristic of Nature could be imitated when joining thin plates by laser…
View article: Coupling of multilayer CAD-CAM prosthetic components: Computing the user interaction influence on the adhesion interface geometry
Coupling of multilayer CAD-CAM prosthetic components: Computing the user interaction influence on the adhesion interface geometry Open
The fracture resistance of multilayer zirconia crowns has recently been proven to be improved by using lithium millable disilicate glass–ceramic blocks (D’Addazio in Materials, 2020). Accordingly, the framework and the ceramic coating are …
View article: Bridging the gap between design and manufacturing specifications for non-rigid parts using the influence coefficient method
Bridging the gap between design and manufacturing specifications for non-rigid parts using the influence coefficient method Open
The manufacturing process may lead non-rigid parts to endure large deformations which could be reduced during assembly. The manufacturing specifications of the single parts should refer to their free state or “as manufactured” state; the f…
View article: Tolerance specifications management in industrial product design cycle
Tolerance specifications management in industrial product design cycle Open
In tolerancing activities, focusing on geometrical tolerances allocation, many critical issues originate from a non-optimal responsibilities assignment among the involved organization units. This paper aims to depict relations between diff…
View article: Functionally Graded Additive Manufacturing: Bridging the Gap between Design and Material Extrusion
Functionally Graded Additive Manufacturing: Bridging the Gap between Design and Material Extrusion Open
Nowadays, the use of 3D printing is becoming a key process for on-demand and customized manufacturing. One of the most flexible 3D printing techniques is fused deposition modeling (FDM), where the combination of multiple materials was rece…
View article: Modeling Materials Coextrusion in Polymers Additive Manufacturing
Modeling Materials Coextrusion in Polymers Additive Manufacturing Open
Material extrusion additive manufacturing enables us to combine more materials in the same nozzle during the deposition process. This technology, called material coextrusion, generates an expanded range of material properties, which can gr…
View article: Evaluation of trueness and precision of removable partial denture metal frameworks manufactured with digital technology and different materials
Evaluation of trueness and precision of removable partial denture metal frameworks manufactured with digital technology and different materials Open
All Δ-mean error values of all digital protocols for manufacturing RPD frameworks optimally fit within the clinical tolerance limit of trueness and precision.
View article: Analysis of the trueness and precision of complete denture bases manufactured using digital and analog technologies
Analysis of the trueness and precision of complete denture bases manufactured using digital and analog technologies Open
The monolithic process yielded better results, in terms of accuracy (trueness and precision), than the other groups, although all three processes led to dentures with Δ-error values well within the clinical tolerance limit.