SECONDARY PROPOSAL OF COUPLING MECHANISM ROTATION UNIVERSAL MODULE

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_201661
MIROSLAV STOFA1, JOZEF SVETLIK1, MARTIN PITUK2
1Technical University of Kosice, Faculty of Mechanical Engineering, Department of Manufacturing Machinery, Kosice, Slovak Republic
2Procesna automatizacia a.s. Kosice, Slovak Republic

e-mail: miroslav.stofa@tuke.sk
Abstract
The authors focus on the adjustment of coupling mechanism Rotation Universal Module that offers unlimited rotation of movement. The module has been designed to achieve different kinematic structures by use of an identical module. A unique interface mechanism, which has undergone several modifications and amendments, has been designed for this module. The main objective is to achieve efficient and more secure initial solution of connecting two adjacent modules. The amendments of primary solution that will contribute to achieve desired outcomes and smooth functioning of the entire device are described in detail.
Keywords: rotation universal module, rotary revolving unit, locking pin, security pin, release pin, big bearing flange
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ARTIFICIAL MUSCLES: STATE OF THE ART AND A NEW TECHNOLOGY

MM (Modern Machinery) Science Journal, February 2017
DOI:10.17973/MMSJ.2017_02_2016100
PETR KOCIS, RADEK KNOFLICEK
Brno University of Technology, Faculty of Mechanical Engineering, Institute of Producing Machines, Systems and Robotics, Brno, Czech Republic
e-mail: 126108@vutbr.cz
Abstract
Pneumatic artificial muscles have been known since 1930s. Their advantage is in a simple design and good specific power [Madden 2004, Kocis 2016b]. However, the critical disadvantage is the requirement of an air compressor or a compressed air accumulator. This disadvantage disables the use of pneumatic artificial muscles in mobile robotics. In constrast to pneumatic artificial muscles dielectric elastomer actuators as basic units of artificial muscles are convenient for mobile robots propulsion [O´Brien 2012, Moghadam 2015]. We investigate a new design of pneumatic artificial muscles that can be powered by the energy of electrostatic field. This paper describes the design of a new artificial muscle technology and solves a behavior under small strains.
Keywords: artificial muscle, pneumatic muscle, dielectric elastomer, electrostatics, actuator
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EVALUATION OF A TOTAL HEIGHT OF PROFILE OF THE SURFACE MACHINED BY WEDM

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016105
KATERINA MOURALOVA, JIRI KOVAR, LENKA KLAKURKOVA
Brno University of Technology, Faculty of Mechanical Engineering, Brno, Czech Republic
e-mail: mouralova@fme.vutbr.cz
Abstract
Wire electrical discharge machining (WEDM) is a non-conventional machining technology, which has become indispensable in many industries. Typical morphology of a surface machined by wire spark erosion (WEDM) is characterized by plenty of craters caused by electrospark discharges produced during the cutting process. The study deals with the evaluation of the surface morphology using a 3D colour-filtered and unfiltered images. Attention was also paid to a total height profile of craters Rt. The experiment consisted of three different settings of machine parameters and 3 metallic materials were used for the testing.
Keywords: WEDM, electrical discharge machining, steel X210Cr12, titanium alloy Ti-6Al-4V, aluminium Al 99.5, total height of profile
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QUALITY OF ALUMINIUM ALLOY SURFACE AFTER WEDM

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016106
KATERINA MOURALOVA, JIRI KOVAR, LENKA KLAKURKOVA, MILAN KALIVODA
Brno University of Technology, Faculty of Mechanical Engineering, Brno, Czech Republic
e-mail: mouralova@fme.vutbr.cz
Abstract
Efficient machining using wire electrical discharge machining (WEDM) technology is a compromise between cutting speed and resulting surface quality. Typical morphology of the surface machined by WEDM shows a plenty of craters caused by electrospark discharges produced during the cutting process. This work is focused on assessing the impact of machine setting parameters on quantitative and qualitative evaluation of the workpiece surface of aluminium alloy AlZn6Mg2Cu. Using metallography, the surface effects arisen during the process of wire spark erosion on cross-sections of preparations were studied. Using local spot EDX microanalysis, the chemical composition of the surfaces of the samples was studied. The attention was also paid to the highest height of profile of the craters, which were studied using 3D filtered images.
Keywords: WEDM, electrical discharge machining, impact layer, aluminium alloy, quality of surface
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SUSTAINABLE BUILDING DESIGN AND ENVIRONMENT

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016138
MILJAN SUNJEVIC1,2, MIRJANA VOJINOVIC-MILORADOV2, DARKO REBA1, MILJANA ZEKOVIC1, BORIS OBROVSKI2, NEVENA ZIVANCEV2
1 University of Novi Sad, Faculty of Technical Sciences, Department of Architecture and urban planning, Novi Sad, Serbia
2 University of Novi Sad, Faculty of Technical Sciences, Department of Environmental Engineering and Occupational Safety and Health, Novi Sad, Serbia

e-mail: msunjevic@uns.ac.rs
Abstract
Architecture and environment are naturally inseparable. Without understanding architectural relationship to natural systems and environment, it is impossible to design proper buildings. It is impossible to understand the natural environment without knowing how human intervention affects it – both positively and negatively. As man and nature begin to recognize their interdependence and relationship, the study of environment takes on a whole new holistic meaning.
In search for new alternative ways of energy sources, more attention is paid to innovation, energy conservation and thermal conductivity, sustainability and the environment (air, water, bio sphere and soil), as well as economical sustainability. This research promotes the model for northern Serbian province of Vojvodina, through modern sustainable eco-buildings and energy conservation required level of sustainability can be achieved.
The paper is based on main integral and eco principles of environmental protection. Applying the interdisciplinary approach and environmental thinking we are creating the shifts in environmental protection strategy, the new values that are effective way of protecting the environment and preserving our planet, which is expected from the developed and the social society as well as from developing countries.
Keywords: thermal conductivity, full-potential calculation, total energy calculations, sustainability, innovation, eco-building
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RECOVERY OF WASTE USING THE GASIFICATION AND OXIDATION OF SCRAP TIRES

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016140
FRANTISEK JANICEK1, MARKUS GIEMZA2, MILAN PERNY1, VLADIMIR SALY1
1 Slovak University of Technology Bratislava, Faculty of Electrical Engineering and Information Technology, Institute of Power and Applied Electrical Engineering, Bratislava, Slovak Republic
2Giemza Industrieanlagen, Asslar, Germany

e-mail: milan.perny@stuba.sk
Abstract
The investigation of the use of microwave gasification as a method that allows to obtain energy from end-of-life (ELTs) tires was subject of this study. The gasification of the waste was carried out within the laboratory microwave reactor HR – Lab, followed by the microwave-assisted oxidation of synthesis gas (syngas) which took place in a small microwave reactor – Microwave Oxidation System (MOS). Details of the experiment, such as power and temperature profile as a function of time and material charges distribution, are listed and explained. Analysis of gasification produced syngas in terms of composition and energy values was done also.
Keywords: microwave reactor, renewable energy sources, pyrolysis, gasification, syngas
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THE ECONOMIC SUSTAINABILITY OF A MODEL THAT BALANCES ECOLOGICAL AND POWER SUPPLY NEEDS

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016143
SNEZANA KIRIN1, PAVEL KOVAC2, BORISLAV SAVKOVIC2, SLADJANA MIRJANIC3, LUBOMIR SOOS4
1University of Belgrade, Innovation Center Faculty of Mechanical Engineering, Belgrade, Serbia
2University of Novi Sad, Faculty of Technical Sciences,
Novi Sad, Serbia
3University of Banja Luka, Faculty of Science,
Banja Luka, Bosnia and Herzegovina
4Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Bratislava, Slovak Republic

e-mail: snezanakirin@yahoo.com
Abstract
Energy from biomass have a number of good features. These crops have a positive effect on the environment, ecology and environmental protection because they serve as a means of rebuilding the degraded area. This paper presents the Miscanthus plant that is for some time used as energetic. It also present a research that has carried on the degraded surface of the landfill. The establishment of plantations is to increase the quality of soil and the produced energy from biomass. The study found that there are some problems in the formation of energy crops in the territory of the landfill. The large dependence of the water because the soil is composed of various landfill construction, animal, municipal and industrial waste, and is quite porous.
Keywords: energy crops, degraded land, economic aspects, sustainable development
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CONSTRUCTION OF ANTI-FLOOD BARRIERS SOLVED BY RECYCLING OF WASTE PLASTICS

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016144
JURAJ ONDRUSKA, LUBOMIR SOOS, VILIAM CACKO, IVETA ONDEROVA
Slovak University of Technology
Faculty of Mechanical Engineering
Institute of manufacturing systems, environmental technology and quality management
Bratislava, Slovak Republic

e-mail: juraj.ondruska@stuba.sk
Abstract
The structure of the development anti-flood barriers from recycled plastics is composed from metal and plastic sources. When designing the geometry and constructing the barrier, the first stage was to design a structure based on the shape of unified blocks made from PP and PE. The last generation of metal construction was constructionally optimized by renowned producer KONSTRUKTA-Industry, a.s.. Unified plastic blocks were designed in Slovakia at Chemosvit
Environchem, a.s. in cooperation with Chemosvit; the focus was to produce blocks made from recycled materials and their subsequent application for beneficial use. The structure underwent numerous optimization processes including load field trials, finite element analysis (FEA) and internal/external stability analysis. Production documentation, prototypes, and field tests were also performed. The latest changes to the design are being performed in order to prepare it for mass production. Our development is the subject of protection [Soos 2011], [Soos 2013], [Soos 2014b], [Soos 2014c], [Soos 2014d]. The latest generation of the strategy is in Fig. 1.
Keywords: recycled plastic, flooding, watergates, flood barrier, selfstabilization, flood wall, flood protection
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TOOLS OF ENVIRONMENTAL MANAGEMENT AND EU CIRCULAR ECONOMY

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016145
EMILIA BODOVA
University of Central Europe in Skalica, Institute of Ecology and Environmental Science, Skalica, Slovak Republic
e-mail: bodovaemilia@gmail.com
Abstract
Among the priority areas of European Union environmental policy is to create a legal, technical and financial conditions to stimulate the effective use of resources and moving towards zero waste. To achieve these objectives, the European Commision is preparing measures in the form of the EU Action Plan for Circular economy. In the circular economy, most products, that would have been disposed in the linear model, are re-used e.g. as a raw material. Thus the value of raw materials is kept within the system for the longest possible time. A certain element of linearity will continue to be preserved in the economy. Enterprises will have to adopt measures to meet the requirements arising from the new legislation. In center interest of managers, researchers, designers and project engineers should be the application of tools of environmental management, such as eco- efficiency of products, ecodesign of products and environmental management systems certification.
Keywords: environmental management systems, ecodesign, requirements, tools
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QUALITY CONTROL OF EARTH CONSTRUCTION FROM ENVIRONMENTAL PROGRESSIVE MATERIALS

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016146
EVA REMISOVA, MATEJ HAJEK, MARTIN DECKY, MATUS KOVAC, MICHAL JUHAS
University of Zilina,
Faculty of Civil Engineering,
Department of Highway Engineering,
Zilina, Slovak Republic

e-mail : eva.remisova@fstav.uniza.sk
Abstract
The article gives special attention to codified clauses of the road construction law, the relevant clauses of standards and technical regulations to design and control the quality of earth constructions built from alternative recycled material. It is important to provide compliance between the values of relevant characteristics used within the design procedure and the subsequent quality control of earth construction and unstabilized layers of roads. The article presents the authors’ suggestions to design of earth constructions of roads according to the Slovak technical standards, technical regulations and objectively determined results of research and development. Article also presents a comparison of the mechanical characteristics measurements of earth subgrade built from the recycled, slag and natural aggregate. The correlation dependence of design elastic modulus on CBR values obtained from in laboratory CBR measuring, representing the world's most widely used control method of bearing capacity of subgrade and construction layers are presented.
Keywords: Earth construction, environment, alternative material, Californian Bearing Ratio, ferro silico manganese slag, recycled aggregate
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SCRAP TYRES AND EXPLOITATION OPTIONS FOR TYRE RUBBER MIX

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016148
JOZEF VIGLASKY, JURAJ KLUKAN, MARIAN JEZO
Technical University in Zvolen,
Faculty of Environmental and Manufacturing Technology,
Department of Environmental and Forest Technology, Zvolen, Slovak Republic

e-mail: jozef.viglasky@tuzvo.sk
Abstract
This paper deals with scrap tyre management and current exploitation routes. The disposal of tyre waste is increasing day by day at exponential rate. Exploitation of end-of-life tyres is a significant environmental issue and challenge for all countries. Rubber has long-term decay in natural conditions due to high durability for lot of climate or soil exposure and biological attacks. Scrap tyres within most countries are burned up nowadays, but this has generally negative influence. From an economic standpoint, however, the profit derived from energy recovery by tyre incineration would be offset by the expense of meeting pollution legislation. Scrap tyres can be utilized in various rubber applications. Recommended solution is to thermally reprocess tyre waste into valuable products. One of thermal processes is pyrolysis that tyre waste can be converted into crude gas, oil and solid products. For instance, solid product can be used as carbon black with quality improvements.
Keywords: scrap tyres, secondary raw material, thermal treatment
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PAPERMAKING SLUDGE PROPERTIES FOR USE IN CONSTRUCTION AND BUILDING

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016149
LUBOMIR SOOS1, MILOS MATUS1, MARCELA POKUSOVA1, PETER KRIZAN1, PAVEL KOVAC2
1 Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of manufacturing systems, environmental technology and quality, Bratislava, Slovak Republic
2 University of Novi Sad, Faculty of Technical Sciences, Institute for Production Engineering, Novi Sad, Serbia

e-mail : lubomir.soos@stuba.sk
Abstract
When processing the waste paper into the tissue paper products, there arises up to 30 to 40 percent of the paper sludge. Today, this sludge is used as an ingredient to manufacture the bricks, to produce compost, or to reclaim the mining pits. The current methods of disposal and recovery of this sludge are cost-intensive, and they often limit the actual quantities of the processed paper waste. Suitably modified papermaking sludge can be used as construction boards or building blocks. It must endeavour to satisfy the requirements for wholesomeness, compressive strength, density, moisture expansion, fire and frost resistance, and thermal and sound insulation. This work presents the authors’ current designing and testing of the manufactured construction elements based on paper sludge.
Keywords: papermaking sludge, sludge modification, experimental building material, tests, construction industry
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FINITE ELEMENT SIMULATION OF THIXOFORMING

MM (Modern Machinery) Science Journal, February 2017
DOI:10.17973/MMSJ.2017_02_2016178
FILIP TIKAL
University of West Bohemia in Pilsen
Faculty of Mechanical Engineering, Regional Technological Institute
Pilsen, Czech Republic

e-mail: ftikal@rti.zcu.cz
Abstract
Thixoforming is an innovative technology in metal processing, which combines the advantages of casting and forging. Thixoformed material is formed in the semi-solid state. The processed alloy is heated to the transition temperature between solid and liquid in order to obtain improved material properties.
Computer simulations for thixoforming technology are logically divided into solution approaches in fluid dynamics and solid mechanics codes, rare in combination of both physics areas.
The aim of the research was to verify the suitability of simulation programs and find effective procedure of computer modeling for real mini-thixoforming equipment.
For the simulation of solidification, mechanical and thermo-physical properties of materials was selected thermodynamic modeling tool JMatPro. For the simulation of the main process the approach of solid mechanics’ solution was selected and program DEFORM™ was used.
In this study, the results of numerical simulations were verified by experiments of semi-solid processing technology with mini-thixoforming equipment.
Keywords: mini-thixoforming, computer simulation, FEM,JMatPro, DEFORM, experiments
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APPLICATION OF POLYSTYRENE PROTOTYPES MANUFACTURED BY FDM TECHNOLOGY FOR EVAPORATIVE CASTING METHOD

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016180
FILIP GORSKI1, WIESŁAW KUCZKO1, RADOSŁAW WICHNIAREK1, PAWEŁ BUN1, PAWEŁ SZYMANSKI2
1) Poznan University of Technology, Chair of Management and Production Engineering
Poznan, Poland
2) Biuro Inzynierskie 4p Paweł Szymanski,
Gniezno, Poland

e-mail: filip.gorski@put.poznan.pl
Abstract
The paper describes possibilities of using additive manufacturing technologies to manufacture single use casting tooling. The foundries usually cooperate with pattern workshops, which manufacture tooling using conventional processes. In case of patterns of complex shapes, it translates into higher costs and longer time of production. An alternative can be use of additive manufacturing (3D printing), proposed by the authors. The additive manufacturing allows to manufacture complex shapes as quick and cheap as simple shapes, being more fit for the more demanding patterns. The studies performed in this paper were aimed at determination if it is possible to effectively manufacture polystyrene (HIPS) patterns using the low-cost machine working in Fused Deposition Modelling technology and use them directly to manufacture castings out of GJS500-7 cast iron in the investment (burnt pattern) casting process. The paper presents examples of products that can be manufactured this way and also shows problems that appeared during the manufacturing processes.
Keywords: fused deposition modeling, evaporative casting, Rapid Tooling, 3D printing
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DETECTION OF GLASS EDGE CORRUGATION FOR CUTTING DISTANCE OPTIMISATION

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016182
ONDREJ MATUSEK, ZDENEK VIT, VLASTIMIL HOTAR
Technical University of Liberec Department of Glass Producing Machines and Robotics
Liberec, Czech Republic

e-mail: ondrej.matusek@tul.cz
Abstract
This paper proposes a new method of surface shape determination for transparent objects. Concretely it deals with a detection of glass-sheet corrugation nearby the sheet edge. This variable is important for cutting distance optimization. Time-dependant laser reflection was used to generate a surface profile. Projection dependence was set. That allows calculating a distance of deformed part. Results were compared with another innovative method, confocal sensor distance measurement and with zebra test, optical test widely used in glass industry.
Keywords: 3D acquisition, 3D data, transparent materials, glass deformation, glass corrugation
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PROCESSING OF NEARLY PURE IRON USING 400W SELECTIVE LASER MELTING – INITIAL STUDY

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016184
DAVID PALOUSEK, LIBOR PANTELEJEV, TOMAS ZIKMUND, DANIEL KOUTNY
Brno University of Technology, Faculty of Mechanical Engineering, NETME Centre,
Brno, Czech Republic

e-mail: palousek@fme.vutbr.cz
Abstract
The proposed article deals with development and initial tests of nearly pure iron powder ATOMET Fe AM (Rio Tinto, QMP) using 400W selective laser melting technology. Magnetic properties in conjunction with 3D printing possibilities of metals could be used in many applications. Metal powder was analyzed for verification of distribution and shape of particles. The main laser parameters such as laser power, laser scanning speed and hatch distance were tested to achieve low porosity and sufficient, high building speed. Laser scanning speed was tested in the range from 200 mm/s up to 1400 mm/s and laser power from 100 W to 400 W. The hatch distance was set to the values of 90, 120 and 150 µm. Porosity was evaluated via microscopy image analysis and micro CT. To obtain mechanical properties the tensile testing was performed.
Keywords: selective laser melting, pure iron, porosity, mechanical properties, pure Fe
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THE DESIGN OF THE 3D PRINTER FOR USE IN GASTRONOMY

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016187
PETR ZELENY, VOJTECH RUZICKA
Technical University of Liberec, Faculty of Mechanical Engineering, Department of Manufacturing Systems and Automation
Liberec, Czech Republic

e-mail: petr.zeleny@tul.cz
Abstract
The research presented in this article deals with the design of appropriate technology and with an implementation of the structural design of the 3D printer for use in gastronomy. A printer concept of RepRap open source project was used and completed with own solution of the extrusion head for printing with chocolate. Chocolate was chosen since it can be easily converted by heat into a plastic-like material and displaced through an extruder on a substrate. Thanks to that, you can print business cards made of chocolate, pralines in shape of whatever the customer desires, or portraits. The printer can also be used for other materials, such as different toppings on cakes, or very complicated structures that would not be possible to create without using 3D printing.
Keywords: 3D printing, 3D chocolate printing, food printing, additive manufacturing, printing technologies, RepRap
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MECHANICAL PROPERTIES OF PRODUCTS MADE OF ABS WITH RESPECT TO INDIVIDUALITY OF FDM PRODUCTION PROCESSES

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016188
MARTIN SEIDL, JIRI SAFKA, JIRI BOBEK, LUBOS BEHALEK, JIRI HABR
Technical university of Liberec, Liberec, Czech Republic
e-mail: martin.seidl1@tul.cz
Abstract
Nowadays the technologies originally developed only for prototype production are involved among modern production techniques. This trend is induced mainly by developing of new materials and very effective improvement of rapid prototyping production methods and tools. The resulting mechanical properties of the products are now fully comparable with the properties of parts produced with using the technologies modified for batch production (e.g. injection moulding or blow moulding etc.). This article deals with comparing the flexural and tensile properties of specimens produced by injection moulding technology and by FDM technology, particularly using three different 3D printers (Dimension SST 768, Fortus 450 and Rep Rap). The part orientation within the build envelope of selected FDM machines is another aspect that was evaluated and that had significant impact on part behaviour of printed parts. All the analysed specimens were made of thermoplastic ABS.
Keywords: FDM, injection moulding, Dimension SST 768, Fortus 450, RepRap, ABS
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MECHANICAL PROPERTIES AND POROSITY OF Ti-6Al-4V ALLOY PREPARED BY AM TECHNOLOGY

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016190
PATRIK PETROUSEK1, JANA BIDULSKA1, ROBERT BIDULSKY1, ROBERT KOCISKO1, ALICA FEDORIKOVA1, RADOVAN HUDAK 2, VIKTORIA RAJTUKOVA 2, JOZEF ZIVCAK 2
1Technical University of Kosice, Faculty of Metallurgy, Institute of Materials, Kosice, Slovak Republic
2Technical University of Kosice, Faculty of Mechanical Engineering, Department of Instrumental and Biomedical Engineering, Kosice, Slovak Republic

e-mail: patrik.petrousek@tuke.sk
Abstract
The specimens manufactured using principle LS (Laser sintering) by the additive manufacturing technologies from the Ti-6Al-4V (Grade 5) titanium alloy are investigated. The powder Ti-6Al-4V is well-known for its slightness and high strength. Metal additive manufacturing processes produce parts with porosity. The possibility of changes in a porosity during an additive manufacturing build may also be an indication of problematic points during the process. This paper is investigated our work to monitoring of part porosity during an additive build, including characterization of mechanical properties such as the average yield strength (YS) and ultimate tensile strength (UTS) , and elongation. Also, the development and detailed characterization of microstructures were carried out.
Keywords: porosity, LS, tensile test, Ti-alloy, mechanical properties, microstructure
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LOGISTICS MOTION ASSIGNMENTS IN ROBOTIZED SYSTEMS

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016193
NAQIB DANESHJO1, MILAN MAJERNIK1, MARIAN KRALIK2, ENAYAT DANISHJOO3
1University of Economics in Bratislava
Faculty of Business Economics with seat in Kosice
Kosice, Slovak Republic
2Slovak Technical University in Bratislava
Faculty of mechanical engineering
Bratislava, Slovak Republic
3Thk rhythm automotive GMBH
Duesseldorf, Germany

e-mail: daneshjo47@gmail.com
Abstract
The authors within the scientific contribution present the optimization of the trajectory of an industrial robot in selected systems. The thesis deal with the task of creating collision-free trajectories of industrial robots, based on the geometric information describing the configuration space with respect to the possibility of robot kinematic. There are introduced the basic methods of exact and probabilistic motion planning. Loading, processing and parameterization of 3D objects. Using algorithms for testing of collisions and visibility. Design of the basic trajectory, which is later optimized to achieve the minimum distance traveled between origin and destination point of travel.
Keywords: robot, logistics, trajectory planning, collision free trajectory, off-line programming
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ENVIRONMENTAL MANAGEMENT IN DESIGN PROCESS OF MACHINERY

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016209
MARIA KRBALOVA, PETR BLECHA
Brno University of Technology, Faculty of Mechanical Engineering, Brno, Czech Republic
e-mail: krbalova@fme.vutbr.cz
Abstract
Nowadays more and more intense discussions of professionals are carried out; they are focused on the issues of global warming. One of the latest documents in the fight against the climate change is the New Global Climate Agreement approved during the Climate Conference in Paris in December 2015. Although the signed agreement does not stipulate any timetable or particular targets for individual countries, it is nevertheless considered to have its impact on the individual spheres of economy, for which there are currently no mandatory environmental requirements. These results in the fact that the existing measures are not sufficient to achieve the objective of 40% reduction in greenhouse gas emissions by 2030 compared with 1990, to which the European Union has already committed itself [EC 2015]. Other measures thus may relate primarily to heavy industry, specifically to the area of machinery, which belongs among large energy consumers [Iskandirova et al. 2014]. The present article covers the assessment of environmental impact of greenhouse gas emissions on designing the machinery. The article describes a proposal of methodology for evaluation of emissions of greenhouse gases released in the production of engineering materials.
Keywords: emission of greenhouse gases, design process, engineering material, machinery, Life Cycle Assessment
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DUAL NUMBERS ARITHMETIC IN MULTI AXIS MACHINE ERROR MODELING

MM (Modern Machinery) Science Journal, February 2017
DOI: 10.17973/MMSJ.2017_02_2016210
JAROSLAV HRDINA, PETR VASIK, MICHAL HOLUB
Brno University of Technology, Faculty of Mechanical Engineering, Brno, Czech Republic
e-mail: hrdina@fme.vutbr.cz
Abstract
When a kinematic chain of a multiaxis machine centre is assembled by means of homogeneous matrices, it is possible to include the error representing matrices within and neglect the error terms which do not affect the prescribed accuracy. Classically, such error terms are identified and neglected according to the system of given identities after the matrix multiplication. In our approach, the matrices itself are designed to form a ring that respects the desired arithmetic of error terms, particularly the ring of matrices over the dual numbers. On the other hand, to make this algebraically possible, several negligible terms remain.
Keywords: dual number, geometric accuracy, volumetric accuracy, CNC machine tools
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