No (1441)
Number of found documents:
1441
Published from
to
Model of content technology education
Walat, Wojciech
2015 - English
Keywords:
modelování; technické vzdělávání; modelling; technology education
Available in the ZČU Library.
Model of content technology education
Career education for visually impaired children at elementary school
Nazarova, L.
2015 - English
The writing focuses on visually impaired children’s school career education and discusses its importance. Its primary goal is to describe the essential elements of visually impaired children’s career education. Tema dannoj stat'i - trudovoe obučenye slabovidjašich detej v načal'noj škole. Osnovnaja cel' issledovanija zaključaetsja v opisanii metodov i elementov trudovogo obučenija detej s nazvannymi narušenijamy.
Keywords:
kariérní vzdělávání; zrakově postiženéh děti; děti se zdravotním postižením; career education; visually impaired children; children with disabilities
Available in digital repository of ZČU.
Career education for visually impaired children at elementary school
The writing focuses on visually impaired children’s school career education and discusses its importance. Its primary goal is to describe the essential elements of visually impaired children’s career ...
Motorcycle crash parameters and its influence on driver injuries
Bońkowski, Tomasz; Kottner, Robert; Hynčík, Luděk
2015 - English
Keywords:
nehodovost; motocykl; zranění; accident rate; motorcycle; injury
Available in the ZČU Library.
Motorcycle crash parameters and its influence on driver injuries
An approach to the machining of hard coatings prepared by laser cladding and thermal spraying
Carou, Diego; Řehoř, Jan; Vilček, Igor; Houdková-Šimůnková, Šárka
2015 - English
Thermal spraying and laser cladding are widely used in industry for different coating applications. The use of these techniques usually requires a finishing post-process. However, the characteristics of these coatings, such as their high hardness, make difficult to achieve satisfactory results with conventional machining processes. The present study provides a description of the main characteristics of the laser cladding and thermal spraying processes. For machining of these coatings, conventionally, grinding is the first option selected. However, modern industries require gaining flexibility and improving their productivity. Thus, other alternatives such as milling or turning need to be assessed. In this sense, in the last section, several experimental investigations on the machining of WC-Co and Stellite coatings are presented. These studies can bring some insights to face the machining of hard coatings prepared by the laser cladding and thermal spraying techniques. For instance, they can help in the selection of the cutting parameters and provide interesting results on the use of different tool materials and tool geometries.
Keywords:
nátěry; laserové obložení; obrábění; žárové stříkání; WC-Co; coatings; laser cladding; machining; thermal spraying; WC-Co
Available in digital repository of ZČU.
An approach to the machining of hard coatings prepared by laser cladding and thermal spraying
Thermal spraying and laser cladding are widely used in industry for different coating applications. The use of these techniques usually requires a finishing post-process. However, the characteristics ...
The usage of laser machining for manufacturing of the cutting insert prototype
Necpal, Martin; Martinkovič, Maroš
2015 - English
In this paper a method for creating chip breaker on cutting insert is described. For cutter inserts the powder is compressed into the molds, in a process. After pressing and sintering the cutting tools chip breaker looks like negative molds shape. For experimental cutting insert prototype is important to design and make molds with specific shape. Designing and production of new molds is time and cost consuming. Another way is to make insert with flat rake face and make chip breaker by an advanced machining method. Hard carbide material may be machined by laser ablation. This paper deals with possibility of laser ablation machine LASERTEC 80 Shape usage for creating of comprehensive chip breaker surface on the carbide insert.
Keywords:
laserové mikroobrábění; řezné nástroje; třísky; laser micromachining; cutting tools; chip breaker
Available in digital repository of ZČU.
The usage of laser machining for manufacturing of the cutting insert prototype
In this paper a method for creating chip breaker on cutting insert is described. For cutter inserts the powder is compressed into the molds, in a process. After pressing and sintering the cutting ...
Design and development of measurement JIG system
Němec, Jiří
2015 - English
Following article describe design and production of the universal clamping jig for clamping measured parts in to three axis measuring machine. This clamping jig was designed and produced under exchange program Erasmus. Department Manufacturing Engineering Group (GEF) University of Vigo (Spain) and Department of Machining Technology (KTO) University of West Bohemia (Czech Republic) cooperated at this project. The clamping jig was created for extension possibilities of fixing of the measured parts in to work space of the meas-uring machine. Current state was insufficient. The worker of the department GEF specified requirements to the new clamping jig. The finally design of the clamping jig had to be universal and had to allow measuring parts in large series.
Individual concepts were designed based on the specification and consultations with the project initiator. The optimal design was chosen from these concepts. The concepts are described in this article. Machines and tools, which are used for fabricating part of the jig, are described in the article. Results of the project are summa-rized in the conclusion.
Keywords:
upínání; jig systém; 3D měřící stroj; výroba; clamping; jig system; 3D measuring machine; manufacturing
Available in digital repository of ZČU.
Design and development of measurement JIG system
Following article describe design and production of the universal clamping jig for clamping measured parts in to three axis measuring machine. This clamping jig was designed and produced under ...
Possibilities of potentiometric methods of detection of cracks in forging tools at their renovation
Pilc, Jozef; Sajgalik, Michal; Struharnansky, Jozef; Rakoci, Jozef; Varga, Daniel
2015 - English
Industrial production, which uses the forging tools constantly increases the requirements for the consumption of forging tools and the need for fast and flexible renovations of them. Forging tools made from special tool steels are highly cost-intensive. The main cost component is the price of the material, heat treatment and other chemi-cal-heat treatment surfaces. This is the main reason why it is necessary to think about renovation at the design stage, in case of the need for repairs. Main weaknesses of the renovations is the insufficient ability of identifica-tion of the cracks spreading from the surface towards the core of the basic components. An important factor in the renovation process is the optimal choice of technology to restore the mechanical and physical properties of tools at an acceptable price, of course. The main issue in the choice of the optimal technology is heat treatment to achieve a high hardness and surface of the die, which is nitrided to ensure wear resistance. This article deals with the application of non-destructive potentiometric detection technology when considering the size of die forging cracks that arise in the process of forming.
Keywords:
renovace nástroje na kování; potenciometrické metody; zjištění prasklin; forging tool renovation; potentiometric methods; crack detection
Available in digital repository of ZČU.
Possibilities of potentiometric methods of detection of cracks in forging tools at their renovation
Industrial production, which uses the forging tools constantly increases the requirements for the consumption of forging tools and the need for fast and flexible renovations of them. Forging tools ...
Labor and profesional training of people with disabilities in the city of Vladimir Through the example of association of parents of disabled children "Light"
Constantinovna, Efimtseva Natalia
2015 - English
The article addresses experience in vocational training in the city of Vladimir. The principal directions, progress and results of training are laid out. The active work in labor training of people with disabilities by Vladimir nonprofit organization Association of Parents of Disabled Children “Light” has become material for this article. V stat'ye rassmatrivayetsja opyt raboty po obučenju professujam v g. Vladimire. Opisany osnovnyye napravlenja, chod i rezul'tat obučenja. Materialom dlya stat'i poslušila aktivnaya rabota VOOO ARDI «Svet» po trudovomu obučenju ljudej s ograničennymi vozmošnostjmi šuznedejatel'nosti.
Keywords:
školení práce; Asociace rodičů zdravotně postižených dětí "Světlo"; odborné vzdělávání; postižený; vada komplexní struktury; labor training; Association of parents of disabled children “Light”; vocational training; disability; defect complex structure
Available in digital repository of ZČU.
Labor and profesional training of people with disabilities in the city of Vladimir Through the example of association of parents of disabled children "Light"
The article addresses experience in vocational training in the city of Vladimir. The principal directions, progress and results of training are laid out. The active work in labor training of people ...
Wear and durability milling tools depending on the CAM strategies
Pokorný, Peter; Zaujec, Rudolf
2015 - English
In this paper is presented research on the influence of CAM strategies for wear and durability shank of cutting tools. We used two machining strategies in this process, when the effective radius change and does not change. Material of tool was hard alloy and high speed steel for machining steel STN 19 520. Shape of cutting tool was Ball Nose end mill. For milling, DMU 85 monoBLOCK 5-axis CNC milling machine was used. The cutting tool wear was measured on Zoller Genius 3, universal measuring machine. The results show different cutting tool wear depending on the milling strategy and material of tool.
Keywords:
opotřebení nástroje; efektivní poloměr; CAM; strategie; wear of tool; effective radius; CAM; strategy
Available in digital repository of ZČU.
Wear and durability milling tools depending on the CAM strategies
In this paper is presented research on the influence of CAM strategies for wear and durability shank of cutting tools. We used two machining strategies in this process, when the effective radius ...
Milling of nano-structured bio-materials for dental implants manufacturing
Stančeková, Dana; Šemcer, Ján; Martikáň, Anton; Rákoci, Jozef; Janota, Miroslav
2015 - English
Mechanical engineering is science discipline, which directly influence all industrial sectors. It is integral part of industrial evolution and is forced to constant advancing in knowledge level. Efficiency increase can be achieved by developing and applying new technologies and materials that ensure the required outputs. Side effect of efficiency increase is also production growth, that follows market needs, which are bounded up with final price of products. Such products are dental implants, which have to meet mechanical requirements and very important property - compatibility with organic materials. This group of biomaterials includes commercially pure titanium TiGr2, TiGr5, nano-structured commercially pure titanium n-Ti and coldformed titanium alloys TiNbTa. This article contains experiment results of milling these materials using different cutting parameters.
Keywords:
nanostukturovaný titan; obrábění; biokompatibilní materiál; nano-structured titanium; machining; biocompatible material
Available in digital repository of ZČU.
Milling of nano-structured bio-materials for dental implants manufacturing
Mechanical engineering is science discipline, which directly influence all industrial sectors. It is integral part of industrial evolution and is forced to constant advancing in knowledge level. ...
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