|
|
Quality control of injection molded plastics using X-ray computer tomography
Figar, Erik ; Šrámek, Jan (referee) ; Jankových, Róbert (advisor)
This Master‘s thesis deals with an aplication of computed tomography as the technology for quality control check of the plastic parts made by the injection molding process. The analyses were performed on two different types of plastic parts. These parts were delivered by two companies and they included the drawing documentation and CAD models. These plastic parts were analyzed according to their qualitative requirements. The analyses included evaluation of the geometric tolerances and porosity analysis with numerical and graphical evaluation. The new module for tool correction ,which is part of VGStudio Max, was tested on parts that were not in accordance with the required tolerances. Afterwards the new corrected geometries were exported. At the end of this Master’s thesis the porosity comparison was assessed between two different voxel resolution CT data. This comparison shows the complexity of this phenomenon and the importance of voxel resolution settings.
|
|
|
Quantitative computed tomography
Šalplachta, Jakub ; Keckes, Jozef (referee) ; Batenburg, Joost (referee) ; Kaiser, Jozef (advisor)
Hlavním cílem této práce je prostudovat, prozkoumat a případně posunout dále oblast kvantitativní počítačové tomografie (QCT) se specifickým zaměřením na laboratorní submikronový CT systém Rigaku nano3DX. Tato práce se zabývá oběma aspekty QCT, kterými jsou akvizice kvantitativních CT dat a využití CT dat pro kvantitativní analýzu. Pokud jde o první aspekt, specifický důraz je kladen na posouzení současných technologických limitů submikronového CT, kde jsou studovány tomografické artefakty způsobené právě technickými nedostatky a navrženy optimální redukční strategie. Také praktické aspekty spojené s implementací spektrálního CT ve formě dual-targetového CT (DTCT) pomocí systému Rigaku nano3DX jsou řešeny vývojem specializovaných metodologií pro akvizici a registrace dat. Pro kvantitativní analýzu CT dat byly vyvinuty dvě nové metody. Jedna z metod byla speciálně navržena pro analýzu porozity vzorků vyrobených metodou 3D-tisku a to s ohledem na klíčové aspekty zpracování tomografických dat, díky čemuž je tato metoda objektivní a reprodukovatelná. Druhá metoda byla speciálně navržena pro kvantitativní hodnocení 3D modelů biologických tubulárních systémů a byla prakticky testována na myším modelu Alagilleova syndromu.
|
|
|
X-ray computer tomographic analysis of four concrete specimens based on steel-making slag and artificial dense aggregates
Souček, Kamil ; Georgiou, Lucie
Visualization of the internal structure, evaluation of the structure and basic analysis of porosity on four concrete test specimens were carried out. The non-destructive method of industry 3D X-ray computed tomography was used for the analysis of the test specimens. Based on the CT slices of individual the specimens of concrete, the four basic components of concrete were identified (i) cement binder, ii) fraction formed by steel-making slag, iii) fraction formed by artificial dense aggregate, iv) the last component of concrete is represented by pores). The carried out CT porosity analysis determined the average porosity of the investigated concrete at the level of 6.5 ± 1.52%.
|
|
|
Quality control of injection molded plastics using X-ray computer tomography
Figar, Erik ; Šrámek, Jan (referee) ; Jankových, Róbert (advisor)
This Master‘s thesis deals with an aplication of computed tomography as the technology for quality control check of the plastic parts made by the injection molding process. The analyses were performed on two different types of plastic parts. These parts were delivered by two companies and they included the drawing documentation and CAD models. These plastic parts were analyzed according to their qualitative requirements. The analyses included evaluation of the geometric tolerances and porosity analysis with numerical and graphical evaluation. The new module for tool correction ,which is part of VGStudio Max, was tested on parts that were not in accordance with the required tolerances. Afterwards the new corrected geometries were exported. At the end of this Master’s thesis the porosity comparison was assessed between two different voxel resolution CT data. This comparison shows the complexity of this phenomenon and the importance of voxel resolution settings.
|
guest ::
