Design and parameter optimization for material extrusion
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Journal Title
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Insinööritieteiden korkeakoulu |
Master's thesis
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Authors
Date
2024-08-19
Department
Major/Subject
Additive Manufacturing for Full Flexibility
Mcode
Degree programme
Master’s programme in Manufacturing
Language
en
Pages
44+5
Series
Abstract
Additive manufacturing is a relatively new technology that not only allows complex models to be printed with relative ease but also significantly reduces material usage compared to traditional methods. Among the various types of additive manufacturing, material extrusion has become widely used in recent times. However, this method often results in manufacturing imperfections and defects. This research examines the effects of different printing parameters, identifies common defects occurring in the material extrusion process, and proposes methods to resolve these defects through design and parameter optimization. The results indicate that a retraction distance below 1.4 mm and a retraction speed below 75 mm/s can reduce the effect of stringing. Additionally, a grid pattern with low separation layer density improves surface quality between the part and its supports. However, to achieve optimal surface quality, it is advisable to minimize the use of supports and utilize the ironing function in areas of interest. Furthermore, the study found that the amount of shrinkage in printed holes depends on the hole size and print orientation, the average shrinkage of an interested hole diameter should be individually tested.Description
Supervisor
Salmi, MikaThesis advisor
Ghadimi, PezhmanKeywords
material extrusion, additive manufacturing, design optimization, parameter optimization