Studio di fattibilità in collaborazione con Kering S.A per la realizzazione di componenti della montatura di occhialeria costituiti interamente in lega metallica sfruttando un processo di manifattura additiva
In questo elaborato sono stati analizzati dei profili estrusi in lega d'alluminio della serie 6xxx, con lo scopo di individuare le cause che concorrevano alla formazione di macchie superficiali e, di conseguenza, di diminuire lo scarto nella produzione dovuto a questi difetti. Lo studio è stato conseguito presso l'azienda Hydro Extrusion s.r.l. di Ornago, e si è articolato in una prima parte di raccolta e rielaborazione di dati già presenti all'interno dell'azienda, e di una seconda parte dov...
Binder-Jetting is an additive manufacturing process characterized by a layer approach, used to produce prototypes or small production series. Polymeric ink is selectively deposited on a metallic powder bed, then the entire volume is put inside a drying oven. Cross-linking of the polymer takes place: this makes it possible to handle the parts which are now more robust. Afterwards, these “green parts” are placed inside a furnace to undergo a thermal de-binding and a sinter cycle. Surface finish...
The development of Nb3Sn films on copper as coatings for accelerating cavities is a viable option to potentially cover the specifications of next generation particle accelerators, such as the Future Circular Collider (FCC), while taking care of the optimization of key aspects like energy consumption. The successful development of a Nb3Sn on copper (Nb3Sn/Cu) scalable prototype would allow for the operation of the accelerator’s Superconducting Radio Frequency (SRF) system at 4.5 K, resulting i...
This thesis explores the mechanical properties and microstructure of a 6xxx-series aluminum alloy, focusing on how positioning within an ageing oven and variations in extruded profile thickness affect these characteristics. The study analyzes direct extrusion of 6060 alloy profiles subjected to T6 heat treatment. Mechanical properties, including hardness, yield strength, ultimate tensile strength, and elongation at break, were evaluated alongside microstructural analysis. A notable thermal gr...
This research is conducted to study the variability in sand casting processes. Specific components are selected to be monitored through the production steps. In addition to the melt preparation and pouring phase, thermal demolding and heat-treatment operations are analyzed. A metallurgical and mechanical characterization, as a function of thermal demolding cycle time, is performed. It is observed that the variability of the filling time results from the component geometry and gating system de...
In the last few years, the laws of materials machining under the flood conditions have become stricter due to environment and human health concern. For this reason, with the aim of enhancing the sustainability of the process while maintaining the cooling and lubrication properties, the use of vegetable oil-based metalworking fluids has been developed alongside Minimum Quantity Lubrication technology.
In this thesis the results of the analyses of Tungsten Carbides (WC) tool wear in drilling, u...
This thesis aims to study how variation in input variables affects the economic performance for a steel organization, using Electric Arc Furnace (EAF) referred to as X.Y.Z Co for confidentiality. Italy is the leading user of EAF in Europe holding a robust manufacturing cycle also aligning with goals of achieving reducing carbon emissions and sustainability as requested by EU Green Deal aiming for Carbon Neutrality by 2050.
Steel sector is subjected to great variation of input variables due t...
L'utilizzo di acciai ad alto limite di snervamento (HSS) sta diventando sempre più diffuso nella progettazione di scaffali per interni e magazzini autoportanti, grazie alle loro superiori proprietà meccaniche che permettono di realizzare soluzioni più leggere e resistenti.
Questa tesi esplora i vantaggi e le sfide associate all'implementazione di due specifici tipi di acciai HSS, S420GD e HX420LAD, in tali applicazioni. Attraverso una combinazione di analisi teoriche e test sperimentali, ven...
Robotic systems involve different physical phenomena and require accurate modeling for assuring high level operative performances, justifying the use of digital twins for different operative phases, from design and prototyping up to operations and maintenance. Here we propose the use of Simscape as a modeling environment for development of digital twins models involving different aspects from kinematics and dynamics, offline and online estimates up to control. The potential of this environmen...
