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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
641

Vyhodnocení vlivu vzdálenosti clonek u sekundárního detektoru na tlak v komoře scintilátoru s ohledem na kritické proudění pomocí systému FloWorks / Using Cosmos FloWorks for analyse the detector.

Hladík, Jaroslav January 2010 (has links)
This work follow up gas fluxion problems in detector chamber of enviromental scanning electron microscope. Describes basic electron microscopes characteristic and evaluation output signal. Basic focus of this work is proposal placing screening in detector in surroundings programme SolidWorks 2008. There is by the help of system COSMOS FloWorks effected analysis pumping gas with different pressure and mutual position which has significant influence in given fluxion conditions. Programmatic surroundings makes it possible to simulation 3D and evaluation fluxion method final capacities by setting fundamental conditions of solving, which would have been next to real behaviour of gas in real detector.
642

Výroba součásti na CNC soustruhu MORI SEIKI NL2000 / Production of a Part with CNC Lathe MORI SEIKI NL2000

Dvořák, Kamil January 2008 (has links)
A technology of a polishing jig which is made on a CNC lathe with the use of the GibbsCAM system. On the 3D model of the part a NC code of the program is made. This code is imported into the machine and verified for single production. After the production measurement is done. Economic evaluation of the production is calculated for the workpiece price.
643

Aplikace CAD/CAM softwaru PowerMILL při obrábění / Application CAD/CAM software PowerMILL for machining

Spáčil, Petr January 2010 (has links)
roject own model of workpiece. Choose competent machine tools for machining. Strategy analysis of machining in software PowerMILL. NC programs processing for given application. Experimental verification of NC programs with system Sinumerik 840D.
644

Aplikace CAD/CAM softwaru FeatureCAM při obrábění / Application of CAD/CAM software FeatureCAM for machining

Foltán, Petr January 2013 (has links)
The diploma thesis contains the manufacturing process of ingot mold part for pistons manufactured by gravity casting using FeatureCAM software. It deals with the selection of appropriate machinery and tooling, determining the cutting conditions and the solution selection of optimal machining strategies in FeatureCAM software. The whole machining process is verified by graphic simulation and is completed with drawing documentation of component.
645

Aplikace CAM softwaru PowerMILL při programování lopatkového kola / Application of CAM software PowerMILL for programming of blisk

Přibilík, Tomáš January 2014 (has links)
This master’s thesis is focused on modeling and creation of NC programs for machining of the impellers. Software used for modeling is CATIA V5R20 from Dassault Systémes company. For creation of NC programs software PowerMILL from Delcam company is used. Verification of functionality of created NC programs is done in Sinumerik 840d control system.
646

Návrh stabilizačního mechanismu pro FPV kamery s využitím CAD/CAM systémů / Design of stabilization mechanism for FPV camera using CAD/CAM systems

Holuša, David January 2014 (has links)
This diploma thesis provides a comprehensive proposal of stabilization mechanism for sensing and FPV camera for remote controlled propeller plane. Summarizes the current human knowledge milestones in the field and describes the current state of knowledge and the market situation. Taking into account all acquired knowledge the author then describes two different design proposals outlining its related processes, such as manufacturing, electronics installation and commissioning.
647

Aplikace CAD/CAM technologie pro návrh a výrobu prototypu těhlice předního kola / Application of CAD/CAM technology for design and manufacture of a prototype of pitman front wheel

Bardoň, Václav January 2014 (has links)
This master's thesis deals with design and manufacture of a prototype of pitman front right wheel of student's formula Dragon 4 of a team TU Brno Racing with use of advanced CAD/CAM technology. Opening part of the thesis deals with the theoretical analysis of milling technology. Furthermore, there is an analysis of aluminum alloys, which aims to integrate the material being machined CERTAL. In the practical part of the work the construction of pitman is done using CAD software SolidWorks 2012 and proposal of milling strategies is done using software PowerMILL CAM 10. The following is the realization of manufacture in CNC machining center MCV 754 QUICK at Bosch Diesel Ltd, in Jihlava. Techno-economic evaluation of the manufacture is done in conclusion.
648

Design of Shape-Morphing Structures Consisting of Bistable Compliant Mechanisms

Alfattani, Rami 25 March 2019 (has links)
This dissertation presents a design concept for shape-morphing structures that have two stable configurations. The design concept defines the methodology of transforming a planar structural shape into spatial structural shape using bistable compliant mechanisms. Bistable complaint mechanisms are used to achieve structural stable configurations. The dissertation incorporating geometrical relationships for the mechanisms that form the primary structure described in step-by-step process. This dissertation implements the design layouts for designer to creating shape-morphing structures including origami. The novel contribution of the work is classified in three models. The first model presents a methodology to induce bistability behavior into an origami reverse fold and partially spherical compliant mechanism. The second model presents the design and development of a bistable triangle-shaped compliant mechanism with motion limits and dwell behavior at the two stable configurations. This mechanism can be arrayed to create shape-morphing structures. The third model presents a design and development for a collapsible bistable compliant mechanism used for a shape morphing lamina-emergent frustum. Finally, physical prototypes of all models are presented as proof of concept.
649

The effects of machining on the flexural strength of CAD-CAM materials

Al-Ayoub, Ghassan 28 September 2016 (has links)
OBJECTIVES: To evaluate the effects of different machining modes on the flexural strength CAD-CAM restorative materials. MATERIALS AND METHODS: Four different CAD-CAM materials were used: VITA MARKII, VITA Enamic (VITA Zahnfabrik), Empress CAD, and e.max CAD (Ivoclar Vivadent). Rectangular bars for each material (except e.max CAD) were made by three procedures: saw cut, normal mill and fast mill. Each subgroup had a sample size of 5. Saw cut bars were cut by a BUHLER diamond blade saw. Milled bars were made using SIRONA CEREC MCXL milling unit. The 3-point flexural strength test was performed using a universal testing machine. Surface roughness was measured using a profilomer. Student t-test and Tukey-Kramer statistical analysis were performed to check significant differences. RESULTS: e.max CAD saw cut group was significantly stronger than the milled group. There was no difference in the strength of the Empress CAD groups. Enamic saw cut group was significantly stronger than the normal milled but not the fast milled one. There was no significant difference between the Enamic milled groups. Vita MKII saw cut was significantly stronger than both milled groups. There was no difference in the strength between the milled MKII groups. The surface roughness of the saw cut groups in all materials were significantly less than their milled counterparts in both longitudinal and transverse measurements. CONCLUSION: Machining had a significant effect on the surface roughness of materials. Damage from machining can cause the material to have lower flexural strength.
650

Novostavba víceúčelového rekreačního objektu

Boháček, Petr January 2019 (has links)
The master theses is focused on design of the new multi-purpose recreation building with several possibilities of utilization of the space due to the most sustainability of the building. The text part of the thesis describes the software used for designing wooden constructions and wooden structures. One software is chosen, which is used for the making of the part of the project documentation of the building. Advanced software options, collaboration, data sharing, and more are described for selected software. The work is conceived as an illustration and description of extended functions and advanced level of use in selected software. The purpose is to save time, cost and make the design process more efficient.

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