Vpliv temperature na mehanske lastnosti 3D tiskanih izdelkov

Janežič, Jan (author), Slemenik Perše, Lidija (mentor)

Namen zaključne naloge je raziskava in določitev vpliva temperature tiskanja na mehanske in geometrijske lastnosti 3D tiskanih izdelkov. V okviru naloge smo s pomočjo namiznega 3D tiskalnika Sharebot natisnili vzorce za natezni preizkus standardnih dimenzij po ISO 527. Vzorce smo natisnili s pomočjo filamentov polilaktične kisline (PLA) pri različnih temperaturah šobe na tiskalni glavi, vsi ostali parametri tiskanja so bili ves čas enaki. Temperaturo šobe smo spreminjali v inkrementih po 10°C v območju od 170°C do 230°C. Vpliv temperature na geometrijske lastnosti smo določili z merjenjem geometrije na izbranih mestih, mehanske lastnosti preizkušancev pa smo določili s pomočjo nateznega preizkusa in nanoindentacije. Na podlagi meritev smo želeli določiti optimalno temperaturno območje tiskanja, pri katerem bi 3D tiskani izdelki imeli najboljše mehanske in geometrijske lastnosti. Rezultati meritev so pokazali, da so bili vzorci geometrijsko najbolj stabilni in so imeli najboljše mehanske lastnosti pri tiskanju s temperaturo 200 °C.

• Language: Slovenian
• Keywords: 3D tiskanje, temperatura, dimenzijska stabilnost, mehanske lastnosti, natezni preizkusi, nanoindentacija
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [J. Janežič]
• Year: 2020
• Number of pages: XV, 42 f., [7] f. pril.
• PID: 20.500.12556/RUL-114821
• UDC: 621.9.04:536.5:620.17(043.2)
• COBISS.SI-ID: 17092123
• Publication date in RUL: 14.03.2020

Secondary language

• Language: English
• Title: The influence of temperature on mechanical properties of 3D printed products

Abstract

The purpose of the presented thesis is to investigate the effect of printing temperature on the mechanical and geometric properties of 3D printed polymer products. As part of the study, samples for tensile testing of standard dimensions according to ISO 527 were printed using the Sharebot desktop 3D printer. Samples were printed with polylactid filaments (PLA) at different temperatures of the nozzle on the printhead, while all other printing parameters were kept constant. The nozzle temperature was changed in increments of 10 °C in the range from 170 °C to 230 °C. The influence of printing temperature on the geometric properties was determined by measuring the geometry at selected points, while the mechanical properties of the tested products were determined by tensile test and nanoindentation. On the basis of measurements, we tried to determine the optimal printing temperature range in which 3D printed products would have the best mechanical and geometric properties. The results showed that the samples were geometrically the most stable and had the best mechanical properties at printing temperature of 200 °C.

• Keywords: 3D printing, temperature, dimensional stability, mechanical properties, tensile tests, nanoindentation