Master Theses & Projects (FEAS)

Permanent URI for this collectionhttps://hdl.handle.net/10155/687

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Browsing Master Theses & Projects (FEAS) by Author "Abou-Ziki, Jana"

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    Electroforming of personalized miniature metal parts using additively manufactured molds
    (2023-12-01) Hamed, Hazem Fawzi; Abou-Ziki, Jana
    In response to evolving manufacturing trends favoring personalized, small-batch production, this thesis centers on the development of additively manufactured molds to facilitate the electroforming of personalized metal parts. The methodology encompasses standardized mold design, experimental procedures for mold development and electroforming, and a simulation model for visualizing and predicting the deposition process. The study provides critical design considerations and guidelines for electroforming within additively manufactured molds, successfully demonstrating the production of composite metal components in 2.5D and 3D configurations. Emphasizing cost efficiency and improved part quality, especially for limited-thickness metal components, the developed technique presents advantages over available metal additive manufacturing processes. Electroforming emerges as a versatile and robust metal additive manufacturing technique, expanding its application beyond traditional limitations of thin-walled hollow structures, 2D components and applications at the nanoscale.
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    Investigation of signal shape effects on the gas film in spark-assisted chemical engraving
    (2023-12-01) Eldiasty, Marwan S; Abou-Ziki, Jana
    Spark-Assisted Chemical Engraving (SACE) is a promising method for machining glass micro-parts and devices. However, intricate control requirements linked to the gas film surrounding the tool present a significant challenge in SACE. While several studies have explored the influence of SACE parameters on the gas film, there exists a literature gap regarding the impact of voltage signal shapes on this film. The thesis fills this void by investigating diverse voltage signal shapes designed to enhance the gas film stability. A robust methodology was established linking gas film properties to investigate the effects of signal shapes on the gas film. The research applied these findings to machining applications, establishing correlations between signal shapes and machining outcomes. Key contributions include a refined methodology for gas film evaluation, advancements in understanding signal shapes’ impact on the process, identification of optimal parameters, and potential improvements in machining through a custom signal shape design.