Ne (1441)
Počet nalezených dokumentů:
1441
Publikováno od
do
Laser beam machining of commercially pure titanium: influence of process parameters on surface roughness
Šugár, Peter; Necpal, Martin; Šugárová, Jana
2015 - anglický
Laser machining is one of the most widely used advanced machining processes used for creating new surfaces, structures, cavities and also complex electro-mechanical devices, usually with very small dimensions, by laser radiation. Optimal selection of process parameters is highly critical for successful material removal and high machine surface quality. In the paper the relation between process parameters and machined surface quality characteristics is experimentally studied applying the five axis highly dynamic laser precision machining centre Lasertec 80 Shape equiped with the pulsed ytterbium fibre laser (wave lenght 1064 nm, maximal average output power 100 W) and CNC system Siemens 840 D and commercionally pure titanium (Grade 2) as working material. The influence of the pulse frequency and energy, laser scanning speed and stepsize (spacing between adjacent passes) on the machined surface roughness is evaluated using Taguchi experimental design approach. The influence of process parameters on surface quality is investigated for two laser scanning strategies: hatching and crosshatching. The significant influence of the stepsize on the machined surface roughness was found.
Klíčová slova:
laser; obrábění; titan; drsnost povrchu; Taguchiho přístup; laser; machining; titanium; surface roughness; Taguchi approach
Plné texty jsou dostupné v digitálním repozitáři ZČU.
Laser beam machining of commercially pure titanium: influence of process parameters on surface roughness
Laser machining is one of the most widely used advanced machining processes used for creating new surfaces, structures, cavities and also complex electro-mechanical devices, usually with very small ...
Documentation of nonconforming products and its optimization
Zídková, Karolína
2015 - anglický
The automotive industry is a specific industrial sector where quality of products is very important. It is therefore necessary to use a unified and internationally accepted structure of documentation. This requirement is especially evident in the issue of nonconforming products. A form called an 8D Report is most often used for recording non-conforming products. The structure of this form contributes to a fast resolution and also contributes to finding the cause of the problem. Because today's business environment is focused on quality products, and also on their minimum price, it is necessary to constantly seek new ways of reducing costs. It is therefore necessary to seek not only savings in production technologies and, develop new materials, but also to find savings in documentation. Documentation offers many possibilities for optimization and for reducing dead time and thereby reducing costs. For effective optimization of documentation is is possible to use MS Excel with advanced features such as macros.
Klíčová slova:
ISO 9001:2008; nevyhovující výrobky; 8D report; MS Excel; makra; ISO 9001:2008; nonconforming products; 8D report; MS Excel; macra
Plné texty jsou dostupné v digitálním repozitáři ZČU.
Documentation of nonconforming products and its optimization
The automotive industry is a specific industrial sector where quality of products is very important. It is therefore necessary to use a unified and internationally accepted structure of documentation. ...
iGEM : input-output yeast diploids
Kasl, Hynek; Georgiev, Daniel
2015 - anglický
Klíčová slova:
syntetická biologie; iGEM; synthetic biology; iGEM
Plné texty jsou dostupné v knihovně ZČU.
iGEM : input-output yeast diploids
Market calibration under a long memory stochastic volatility model
Sobotka, Tomáš
2015 - anglický
Klíčová slova:
kalibrace trhu; stochastické volatility; finanční modelování; market calibration; stochastic volatility; financial modelling
Plné texty jsou dostupné v knihovně ZČU.
Market calibration under a long memory stochastic volatility model
The game as a means of learning stimulation
Komarova, Anastasiya
2015 - anglický
The article presents Master Diploma on the problem of pupils’ activity (stimulation) at the lessons of Technology in the school №16, the city of Vladimir, Russia. The plan of the lesson in the form of the game “Fabric, its properties and kinds” is offered for teachers of Technology.
Klíčová slova:
hra; stimulace učení; technologie; tkanina; game; learning stimulation; technology; fabric
Plné texty jsou dostupné v digitálním repozitáři ZČU.
The game as a means of learning stimulation
The article presents Master Diploma on the problem of pupils’ activity (stimulation) at the lessons of Technology in the school №16, the city of Vladimir, Russia. The plan of the lesson in the form of ...
Technologies savings of health on lessons of labor training
Platonova, C.
2015 - anglický
Now, most schoolchildren do not have a one hundred percent health, so the problem of children's health is very serious. At lessons of work pupils learn to take care of their health in everyday life (learn to eat right, observe good personal hygiene, etc.). It is further important aspect of their adult life. Sejčas bol'šinstvo škol'nikov ne imejut 100%nogo zdorov'ja, poetomu problema ochrany zdorov'ja detej stoyt očen' ostro. Na urokach truda škol'niki učatsja berech' svoye zdorov'ye v povsednevnoj žizni (uchatsja pravil'no pitat'sja, sobljudat' pravila lichnoj gigiyeny i t.d.). Eto javljayetsja važnym aspektom ich dal'nejshej vzrosloj žizni.
Klíčová slova:
zdravotní šetrné technologie; zdravotní péče; prevence únavy; bezpečnostní poradenství; hygienické a sanitární požadavky; health savings technologies; health care; prevention of fatigue; safety advice; hygiene and sanitary requirements
Plné texty jsou dostupné v digitálním repozitáři ZČU.
Technologies savings of health on lessons of labor training
Now, most schoolchildren do not have a one hundred percent health, so the problem of children's health is very serious. At lessons of work pupils learn to take care of their health in everyday life ...
The influence of thresholding strategy on multi-label topic identification
Lehečka, Jan
2015 - anglický
Klíčová slova:
identifikace tématu; predikce; topic identification; prediction
Plné texty jsou dostupné v knihovně ZČU.
The influence of thresholding strategy on multi-label topic identification
Modelling and experimental validation of signalling pathways with relevance to homologous mammalian systems
Puchrová, Tereza; Georgiev, Daniel
2015 - anglický
Klíčová slova:
modelování; savci; experiment; modelling; mammal; experiment
Plné texty jsou dostupné v knihovně ZČU.
Modelling and experimental validation of signalling pathways with relevance to homologous mammalian systems
Detection of deformation zones when machining nickel alloys
Czán, Andrej; Šajgalík, Michal; Drbúl, Mário; Holubják, Jozef; Kordík, Marek; Rákoci, Jozef
2015 - anglický
Processes in cutting zone are so complicated and dynamic, that their definition is performed by specific created models. Innovative measurement methods of the process can be used to improve and verify the accuracy of these models. With these methods, there are many sources of error when using empirical or exact methods such as infrared radiation thermography to measure the temperature distribution of the tool, workpiece, and chip during metal cutting. Furthermore, metal cutting presents unique measurement challenges due to factors such as the high magnification required, high surface speeds and deformations, microblackbody effects, changing emissivity, and primary, secondary and tertiary deformations. To better understanding of phenomena in deformation zones and detection of them is necessary to know the greatest number of measurable factors, which affect the cutting process. In experiments, there were performed the measuring of temperature and its distribution, ratios of cutting forces and monitoring of deformation processes using by high-speed optical scanning system. These measurements were performed by multifunctional system which allow to measure and monitor all required factors simultaneously. The outputs from this multimeasuring system are the basis for verification of theoretical knowledge from this field and elimination of the uncertainties that arise with computational simulation systems.
Klíčová slova:
deformační zóny; slitiny nicklu; multifunkční měřící systém; deformation zones; nickel alloys; multifunction measuring system
Plné texty jsou dostupné v digitálním repozitáři ZČU.
Detection of deformation zones when machining nickel alloys
Processes in cutting zone are so complicated and dynamic, that their definition is performed by specific created models. Innovative measurement methods of the process can be used to improve and verify ...
Use and influences of CAx technologies on the components production cycle
Milde, Ján; Pokorný, Peter
2015 - anglický
This thesis focuses on the use and influences of CAx Technologies on component production cycle. At the same time it lists and describes computer aided technologies that deals with this subject.
This thesis identifies basic medical and stomatology concepts as well as methods used. It also contains a detailed example of manufacturing medical implants such as knee implant or dental crown. It further explains the detailed process of acquiring a digital description of implant shape and its subsequent modification. Attention is drawn to a analysis of ultrasonic machine ULTRASONIC 20 linear, which was used for manufacturing of dental bridge. In the centre of Excellence 5-axis machining in Trnava, where we manufactured a hip implant. The fabrication was accomplished by 4 - and 5 - axis kinematic structures of machining by the Eagle machine.
The last part of this thesis concentrates on the rapid protoyping technologies and comparating of direct and indirect methods of manufacturing of medical components.
Klíčová slova:
CAD/CAM; lékařská výroba; ultrazvukové obrábění; rychlé prototypování; CAD/CAM; medical manufacturing; ulstrasonic machining; rapid prototyping
Plné texty jsou dostupné v digitálním repozitáři ZČU.
Use and influences of CAx technologies on the components production cycle
This thesis focuses on the use and influences of CAx Technologies on component production cycle. At the same time it lists and describes computer aided technologies that deals with this subject. This ...
NUŠL poskytuje centrální přístup k informacím o šedé literatuře vznikající v ČR v oblastech vědy, výzkumu a vzdělávání. Více informací o šedé literatuře a NUŠL najdete na webu služby.
Vaše náměty a připomínky posílejte na email nusl@techlib.cz
Provozovatel
Zahraniční báze