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Visar resultat 11 - 15 av 331 avhandlingar som matchar ovanstående sökkriterier.

1. 11. Management of the industrialisation process in distributed geographical and organisational contexts

   Författare :Paraskeva Wlazlak; Glenn Johansson; Kristina Säfsten; Sofia Ritzén; Jönköping University; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; new product development; industrialisation; distribution; integration; research and development; manufacturing; produktutveckling; distribuerad; industrialisering; integration; FoU; tillverkning;

   Sammanfattning : Management of new product development (NPD) is one of the most critical capabilities of original equipment manufacturers (OEMs). The industrialisation process plays a major role in NPD, where the final verification of the product and production system takes place. LÄS MER

3. 12. Modelling of laser-based powder bed fusion for bulk metallic glass formation

   Författare :Johan Lindwall; Andreas Lundbäck; Albert To; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

   Sammanfattning : The work presented in this thesis aims to develop a modelling approach to predict crystalline phase evolution in bulk metallic glass during additive manufacturing with laser-based powder bed fusion (PBF-LB). Metallic glasses are non-crystalline metallic materials that generally possess exceptional properties because of its amorphous struc-ture. LÄS MER

4. 13. Electron beam powder bed fusion of Nitinol : A development from production process window towards delicate structures

   Författare :Lin Zeyu; Amir Rashid; Carolin Körner; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Production Engineering; Industriell produktion;

   Sammanfattning : Electron beam powder bed fusion (PBF-EB) is increasingly attracting attention for manufacturing the near-net shape parts due to its incomparable merits, such as free residual stress and superior mechanical performance. Nickel Titanium (NiTi) as the most widely used functional alloy, has not been systematically explored for manufacturing using PBF-EB despite the perfect vacuum and high temperature manufacturing environment. LÄS MER

5. 14. Part Quality Prediction and Variation Reduction in Multistage Machining Processes Based on Skin Model Shapes

   Författare :Filmon Yacob; Daniel Semere; Sophie Gröger; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machining simulation; model-based prediction; variation propagation; variation source identification; variation compensation; tolerance analysis; Octree; anomaly detection; quaternion; dual quaternion; Plücker coordinate.; Maskinbearbetningssimulering; modellbaseradförutsägelse; variationsspridning; variationskällidentifiering; variationskompensation; toleransanalys; Octree; dual quaternions; Plücker-koordinat.; Production Engineering; Industriell produktion;

   Sammanfattning : All manufacturing processes inevitably induce variations into manufactured parts that may result in nonconformance. Nonconforming parts incur costs due to the additional process required for rework or scrap loss. Hence, methodical efforts to reduce these variations are necessary for competitive manufacturing. LÄS MER

7. 15. Additive manufacturing of Ni-based Superalloys- an analysis of parameter and strategy driven properties in Electron Beam Melting Process

   Författare :Xiaoyu Zhao; Amir Rashid; Carolin Körner; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive manufacturing; Electron beam melting; Super-alloys; process optimization; surface defects; subsurface defects; mechanical properties; thermal stresses; thermal deformation; Production Engineering; Industriell produktion;

   Sammanfattning : Metal AM processes produce significantly rough surfaces as compared to wrought or machined components. Currently, the as-EBM surfaces are extremely rough and consequently, the as-built components could not be directly used as commercial products. The state-of-the-art research has focused primarily on deeply machined (DM) samples. LÄS MER