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Analysis of Plastic Materials Produced by Additive 3D Printing Technology
Spišák, Lukáš ; Joska, Zdeněk (referee) ; Sedlák, Josef (advisor)
The diploma thesis deals with the influence of colouring additives and setting of the process parameters of 3D printing on the mechanical and surface properties of samples made of PLA material. The work describes the process of filament production, as well as the printing of normalized samples on a 3D printer using the additive method Fused Deposition Modeling. The impact of 3 types of colouring additives is evaluated on the basis of tensile test, hardness test and surface analysis. The evaluated quantities are primarily tensile strength, hardness, surface texture, roughness and corrugation. The work also evaluates the influence of the percentage of sample filling, the direction of the fibres of the inner filling and the orientation of the samples in the printing chamber of the 3D printer on the mechanical properties. The results are evaluated on the basis of the tensile test and the evaluated quantities are mainly the tensile strength, the ultimate stress and the modulus of elasticity in traction. The work is completed by evaluating the results and overall recommendations for filament manufacturers and users.
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Welding of bike frames
Kotrík, Marcel ; Daněk, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
In my bachelor thesis I elaborated an overview of suitable materials for the manufacturing of bicycle frames. Most preferred materials for mass production of bicycle frames are cured aluminum alloys. The best method for joining aluminum tubular frame construction is fusion welding at robot lines in a protective atmosphere of inert gas. We measured the hardness of the welded metal, heat affected zone and base material at the weld of the bicycle frame. Values are very similar in all areas, so the whole frame structure was cured. We welded a test weld, using TIG method. Hardness of the test weld is about 24.5 % lower, than hardness of the weld from manufacturer. Hardness of the heat affected zone is even lower. The curing of the whole frame construction is therefore very important. There is a concentration cavity in the cut of the weld from manufacturer and the root of the weld is not welded all over. The same defects are in the cuts of our test welds, there is also porosity in one of the test welds. But the test weld is satisfying, despite the defects.
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Hardness and scratch resistance measurement using universal tribometer
Urbášek, Jan ; Galas, Radovan (referee) ; Omasta, Milan (advisor)
This bachelor thesis deals with a hardness and scratch resistance measurement. These tests are normally performed using special devices. From a design point of view, these tests can also be performed using universal tribometers, but they do not have implemented tools for subsequent measurement evaluation. The main goal of the work was to develop a methodical procedure including evaluation of these tests. The methodological procedures were subsequently verified by several experiments.
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Analysis of mechanical properties of plastic samples produced by 3D printing technology
Jiroušek, Jan ; Joska, Zdeněk (referee) ; Sedlák, Josef (advisor)
The master's thesis deals with the determination of mechanical properties of materials used for 3D printing (PLA, PETG, ABS, ASA). The theoretical part contains characteristics of polymer materials and describes testing of mechanical properties and additive technologies. In the experimental part, the standardized samples produced by the technology Fused Filament Fabrication were analysed using mechanical tests (tensile test and hardness test). Some of the examples were exposed to the selected factors of degradation. Selected parameters from mechanical testing (tensile strength, modulus of elasticity in tension, elongation and Shore hardness) were statistically processed. The conclusion of the thesis evaluates the impact of the factors of degradation on particular materials and compares them subsequently.
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Analysis of mechanical properties of plastic samples produced by 3D printing technology
Jiroušek, Jan ; Joska, Zdeněk (referee) ; Sedlák, Josef (advisor)
The master's thesis deals with the determination of mechanical properties of materials used for 3D printing (PLA, PETG, ABS, ASA). The theoretical part contains characteristics of polymer materials and describes testing of mechanical properties and additive technologies. In the experimental part, the standardized samples produced by the technology Fused Filament Fabrication were analysed using mechanical tests (tensile test and hardness test). Some of the examples were exposed to the selected factors of degradation. Selected parameters from mechanical testing (tensile strength, modulus of elasticity in tension, elongation and Shore hardness) were statistically processed. The conclusion of the thesis evaluates the impact of the factors of degradation on particular materials and compares them subsequently.
|
|
|
Analysis of Plastic Materials Produced by Additive 3D Printing Technology
Spišák, Lukáš ; Joska, Zdeněk (referee) ; Sedlák, Josef (advisor)
The diploma thesis deals with the influence of colouring additives and setting of the process parameters of 3D printing on the mechanical and surface properties of samples made of PLA material. The work describes the process of filament production, as well as the printing of normalized samples on a 3D printer using the additive method Fused Deposition Modeling. The impact of 3 types of colouring additives is evaluated on the basis of tensile test, hardness test and surface analysis. The evaluated quantities are primarily tensile strength, hardness, surface texture, roughness and corrugation. The work also evaluates the influence of the percentage of sample filling, the direction of the fibres of the inner filling and the orientation of the samples in the printing chamber of the 3D printer on the mechanical properties. The results are evaluated on the basis of the tensile test and the evaluated quantities are mainly the tensile strength, the ultimate stress and the modulus of elasticity in traction. The work is completed by evaluating the results and overall recommendations for filament manufacturers and users.
|
|
|
Hardness and scratch resistance measurement using universal tribometer
Urbášek, Jan ; Galas, Radovan (referee) ; Omasta, Milan (advisor)
This bachelor thesis deals with a hardness and scratch resistance measurement. These tests are normally performed using special devices. From a design point of view, these tests can also be performed using universal tribometers, but they do not have implemented tools for subsequent measurement evaluation. The main goal of the work was to develop a methodical procedure including evaluation of these tests. The methodological procedures were subsequently verified by several experiments.
|
|
|
Welding of bike frames
Kotrík, Marcel ; Daněk, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
In my bachelor thesis I elaborated an overview of suitable materials for the manufacturing of bicycle frames. Most preferred materials for mass production of bicycle frames are cured aluminum alloys. The best method for joining aluminum tubular frame construction is fusion welding at robot lines in a protective atmosphere of inert gas. We measured the hardness of the welded metal, heat affected zone and base material at the weld of the bicycle frame. Values are very similar in all areas, so the whole frame structure was cured. We welded a test weld, using TIG method. Hardness of the test weld is about 24.5 % lower, than hardness of the weld from manufacturer. Hardness of the heat affected zone is even lower. The curing of the whole frame construction is therefore very important. There is a concentration cavity in the cut of the weld from manufacturer and the root of the weld is not welded all over. The same defects are in the cuts of our test welds, there is also porosity in one of the test welds. But the test weld is satisfying, despite the defects.
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