MONITORING OF PRODUCTION QUALITY FOR PLASTIC COMPONENT

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201622

JOZEF DOBRANSKY1, FRANTISEK BOTKO1, EVA VOJNOVA2

1Technical University of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Slovak Republic

2 1st Presov Tool Making Company, Lubotice, Slovak Republic

e-mail : jozef.dobransky@tuke.sk

Abstract

Presented article is focused on monitoring of plastic component production, which is used in automotive industry. Quality of products depends on inspection of production process and thus is essential to use all available control methods. Two methods were used for evaluation of monitoring. First method is verification of measuring system capability, using measuring system analyze. Subsequently was assessed capability of manufacturing system through capability index. Quality indicators were represented by dimensional characteristics of serial produced plastic component. Plastic molding was manufactured using plastic injection technology and is intended for lightening system in vehicles cargo space. All documents for the monitoring capability was provided by LPH Vranov/T, Ltd. Article contain overall assessment of the results and assess the overall capability of measuring and production system.

Keywords: production, measuring system, quality indicators, injection molding, capability

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A DEVICE DESIGNED TO MONITOR NEW BELT TYPES WITH APPLICATION OF DIAGNOSTIC SYSTEM

MM (Modern Machinery) Science Journal, September_2016
DOI: 10.17973/MMSJ.2016_09_201624

JOZEF MASCENIK, SLAVKO PAVLENKO, LUBA BICEJOVA

Technical Universtity of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Department of

Technological System Design, Slovak Republic

e-mail : jozef.mascenik@tuke.sk

Abstract

The presented paper deals with the alternative of determination of state of new belt types of the belt gear in case of a designed device. The developing and structural-design stage, during which realization of a testing device was performed with Autodesk Inventor program, was followed by a production technology design. An electric motor serves as a device drive and belt gear with the other electric motor representing a system load factor. The frequency converters diagnosed by the software intended for the purpose drive both motors. Through a simple adjustment of the designed device, diverse types and dimensions of the belts and belt pulleys can be changed. Monitoring and diagnostics of the tracked parameters was performed by the sensors fixed in the positions prescribed in advance. All the parameters can be assessed by a PC.

Keywords: motor, diagnostics, stand, sensor, belt gear

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ANALYSIS OF HYSTERETIC BEHAVIOR OF TWO-DOF SOFT ROBOTIC ARM

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201625

ALEXANDER HOSOVSKY, JAN PITEL, KAMIL ZIDEK

Faculty of Manufacturing Technologies with seat in Presov Technical University of Kosice, Presov, Slovak Republic

e-mail: alexander.hosovsky@tuke.sk

Abstract

Soft robotic arm actuated with pneumatic artificial muscles (PAMs) exhibits various interesting properties (static or dynamic) in contrast to conventional robots with electric motors. In addition to nonlinear relationship between various variables, PAMs are known for the hysteresis inevitably associated with their specific construction. In order to be able to develop a model useful for designing the effective control, it is necessary to analyse the relevant features of its performance. In particular, we concentrate on analysing certain aspects of hysteretic behaviour of two-DOF planar arm which uses two pairs of PAMs so that the results can be used e.g. for compensation of hysteresis using its inverse model.

Keywords: dynamic model, pneumatic artificial muscles, robotic arm, joint angle, hysteresis

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AUTOMATIZATION PROCESS OF DESIGNING THE TECHNOLOGICAL DOCUMENTATION BY TOOLS OF COMPREHENSIVE CAD-CAM-CAE SYSTEM

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201630

MARTIN POLLAK, PETR BARON, JOZEF ZAJAC

Technical University of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Slovak Republic

e-mail: martin.pollak@tuke.sk

Abstract

The article describes an automated production of process documentation in an environment of PTC Creo 3.0. Process documentation is a simplified form of technological documentation, which is directly generated in the environment of comprehensive CAD-CAM-CAE system. Creation of process documentation is based on design of the templates that contain all the necessary information to ensure a smooth production process by production operators. Generating takes place on the inputs received from the proposal of NC machining program. The main advantage of the creation of process documentation is its fast processing, the possibility of additional editing, archiving, graphical representation of machining sequences and tools for generating at any moment during working time. The result of the creation is generated process documentation, which represents a complete supporting documentation. Generated process documentation with the created NC program provides required information for CNC machine operators to ensure the smooth process of machining parts.

Keywords: automated processing, NC program, process documentation, generation

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DESIGN OF ADJUSTABLE SMART VISION SYSTEM BASED ON ARTIFICIAL MUSCLE ACTUATORS

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201635

KAMIL ZIDEK, JAN PITEL, ALEXANDER HOSOVSKY

Technical University of Kosice, Department of Mathematics, Informatics and Cybernetics with a seat in Presov, Slovak Republic

e-mail: kamil.zidek@tuke.sk

Abstract

The paper describes a proposal of positional adjustable camera system based on artificial muscles for rapidly changing products with different height and sizes on a conveyor belt. Measuring accuracy by camera system is heavily dependent on the distance of the camera system from the captured part. The ideal situation is that component occupying a largest area of the processed image. Current positioning technologies on the principle of ball screws with an electric motor do not reach sufficient speed to dynamically adjust the position of the camera system. Traditional technologies significantly increase the risk of vibration of the whole structure in the repeated resizing captured parts. Artificial muscles due to its flexibility significantly reduce the risk of vibration and noise of designed mechanism. The proposed smart camera system can be used to measure the dimensions or fault finding on manufactured parts in automated lines.

Keywords: image processing, artificial muscles, segmentation, automation

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DETERMINITATION OF RELATION BETWEEN INFLUENCE OF LASER PERFOMANCE CHANGE AND CUTTING SURFACE CHARACTER IN LASER CUTTING TECHNOLOGY

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201637

SLAVKO PAVLENKO

Technical Universtity of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Department of Technological Systems Design, Presov, Slovak Republic

e-mail: slavko.pavlenko@tuke.sk

Abstract

The introduction of the submitted paper describes theoretical foundations of material laser cutting technology. The core analyses direct relation between influence of laser performance and cutting surface character when the cutting material thickness changes. The experimental measurements applied material S235JRG2 (according to EN 10025/90+A1/93) with thickness of 3 mm, 4 mm, 6 mm, 8 mm and 10 mm. The conclusion presents recommendations for entrepreneurial, research, and pedagogical sphere.

Keywords: laser, surface roughness, sheetmetal, performance

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EVALUATION OF THE IMPACT OF PRODUCTION PARAMETERS ON THE FINAL PROPERTIES OF THE PART MADE OF NYLON 12 WITH RAPID PROTOTYPING TECHNOLOGY (FDM)

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201638

JIRI SAFKA, MICHAL ACKERMANN, MARTIN SEIDL, LUBOS BEHALEK, JIRI BOBEK, JAKUB KLUNEJKO

Technical University of Liberec, Liberec, Czech Republic

e-mail: jiri.safka@tul.cz

Abstract

Nylon is a widespread polymer material employed primarily for engineering applications. Its rheological behavior is suitable for a wide range of manufacturing techniques which produce parts with very specific properties. Representatives of prototype systems are included among these production technologies and this article is focused especially on 3D printing. FDM technology, that allows processing of nylon filaments, was selected to analyze the effect of various processing parameters on the final properties of the product and the overall production procedure. The effect of orientation of the components in the production machine work space on the final strength and structural compactness was analyzed. The product quality and overall economic aspects, based on production time and the total amount of material, including the supporting materials were other evaluating criteria.

Keywords: fused deposition modelling, nylon 12, tensile test

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EXPERIMENTAL DETERMINATION OF CUTTING SPEED INFLUENCE ON CUTTING SURFACE CHARACTER IN MATERIAL LASER CUTTING

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201639

JOZEF MASCENIK

Technical Universtity of Kosice, Faculty of Manufacturing Technologies with a seat in Presov Department of Technological Systems Design, Slovak Republic

e-mail: jozef.mascenik@tuke.sk

Abstract

In industrial practice the material laser cutting is extensively used for rather accurate and high-quality cutting of both metal and non-metal materials. The objective of the submitted paper is to point out direct relation between influence of cutting speed and surface character of material cut by laser. Cutting speed ranks among the most significant technological parameters in laser cutting and represents important parameter for the productivity of production process. The results of experimental measurements can be applied in practice.

Keywords: laser, surface roughness, sheetmetal, cutting speed

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EXPERIMENTAL MONITORING AND DIAGNOSTICS OF BELT GEARS IN TESTING DEVICE

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201641

JOZEF MASCENIK, IMRICH VOJTKO

Technical University of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Department of Technological System Design, Department of Computer Aided Manufacturing Technologies, Slovak Republic

e-mail: jozef.mascenik@tuke.sk

Abstract

Constant development in mechanical engineering increasingly employs machines with high frequency revolutions requiring high efficiency and noiseless running and thus qualitative demands laid for belt gears increase as well. A new device for measuring and diagnostics of belt gears was designed to realize experimental measurements. Measurements can determine, for instance, slip of a V-belt expressed by the coefficient of elastic creep and of specific slip. Measurements regarding the designed device can be performed when input revolutions of the electric motor and torque of the belt gear are constant and tensioning force of the belt gear varies or when input revolutions of the electric motor and tensioning force are constant and output torque varies. The monitored parameters are assessed by particular software solutions.

Keywords: belt gear, monitoring, diagnostics, device

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INFLUENCE OF GAS PRESSURE CHANGE ON CHARACTER OF CUTTING SURFACE IN MATERIAL LASER CUTTING

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201644

LUBA BICEJOVA

Technical University of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Department of Technological Systems Design, Slovak Republic

e-mail: luba.bicejova@tuke.sk

Abstract

The submitted paper deals with the issue of unconventional technology of material laser cutting. The paper presents particular relations between the influence of gas pressure change and character of cutting surface after experimental measurements.[Gaspar 2013] Gas pressure change was applied in case of the selected sheetmetal thickness. The samples taken during experimental measurements were prepared in cooperation with the private sector which employs the laser cutting technology directly in production. The conclusion contains the results of the measurements and discussion on the respective issue.

Keywords: laser, surface roughness, sheetmetal, gas pressure

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INFLUENCE OF SELECTED TECHNOLOGICAL PARAMETERS ON CUTTING SURFACE ROUGHNESS IN MATERIAL LASER CUTTING

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201645

LUBA BICEJOVA, SLAVKO PAVLENKO

Technical Universtity of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Department of Design Technical Systems, Slovak Republic

e-mail: luba.bicejova@tuke.sk, slavko.pavlenko@tuke.sk

Abstract

The paper deals with the influence of the selected technological parameters on cutting surface roughness in material laser cutting. It more closely examines and compares technological parameters such as cutting speed, laser performance, and gas pressure. The paper also contains the information on influence of the respective technological parameters on character of the material surface cut by laser S235JRG2 (according to EN 10025/90+A1/93) with change of the selected material thickness. The conclusion presents a discussion analysing the experimental measurements and their application in practice.

Keywords: laser, surface roughness, sheetmetal, gas pressure

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INFLUENCE OF THE PRESSURE TANKS REPEATED ENAMELING ON THE BASIC MATERIAL DEGRADATION

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201646

IVA NOVAKOVA, JAROMIR MORAVEC

Technical University of Liberec, Faculty of Mechanical Engineering, Department of Engineering Technology, Liberec, Czech Republic

e-mail: iva.novakova@tul.cz

Abstract

Pressure tanks with the enamel surfaces play an important role mainly in the food industry and pharmacy. As the best advantage of these enamels there is very good resistance against aggressive environment at keeping the required mechanical properties of low-alloyed steels which are used for these applications. Enameling is generally applied as several particular layers whereas every of these layers has to undergo the pre-defined temperature cycle. Because of increasing device service life there is very often applied repeated enameling. The paper deals with the monitoring influence of the temperature exposition on the change of mechanical properties and structure of the basic material P265GH regarding its initial properties. The aim was to identify whether and eventually how these repeated emailing can influence the basic material degradation and based upon this to determinate their possible maximal number.

Keywords: enamel, steel, heat treatment, annealing, structure, mechanical properties

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MODEL OF INTEGRATED COMPREHENSIVE MAINTENANCE SYSTEM

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201650

ADAM ZILINSKY, JOZEF SVETLIK

Technical University of Kosice, Faculty of Mechanical Engineering, Department of Production Systems, Kosice, Slovak Republic

e-mail: adam.zilinsky@tuke.sk

Abstract

In terms of practice, maintenance is carried out to ensure the desired reliability of production systems so that the total cost of the operation of such systems are the lowest. Article describes the benefits and advantages of the integration of complex system maintenance and example of its application. The main objective is familiar with the problems of maintenance and failure of machinery and equipment, as well as a generalization of the integration system maintenance. The article describes the different steps and examples of integration solutions. It addresses the complex maintenance of CNC machines and robotic systems.

Keywords: maintenance, integrated, comprehensive, machine, diagnostics

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MONITORING OF THE MACHINE MILKING PROCESS WITH APPLICATION OF INFRARED THERMOGRAPHY

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201652

PETR JUNGA1, PETR TRAVNICEK1, JURAJ RUZBARSKY2

1Mendel University in Brno, Faculty of AgriSciences, Department of Agriculture, Food and Environmental Engineering, Brno, Czech Republic

2Technical University of Kosice with a seat in Presov, Faculty of Manufacturing Technologies, Slovak Republic

e-mail: p.junga@mendelu.cz

Abstract

The paper is focused on monitoring of the machine milking process by infrared thermography method. The goal of the paper is thermography monitoring of the influence of machine milking on the udder and teats surface temperature and statistics valuation of measured values. Our study claimed suitability of IRT method for monitoring of machine milking. Statistical evaluation claimed statistically significant difference between temperatures of teats before and after machine milking. Probably it is due to direct contact of milking machine with teats causing mechanical stress of tissues. This is significant risk factor for infections and related financial losses. It is necessary to operate technological equipment for milking with suitable characteristics.

Keywords: monitoring, infrared thermography, machine milking, surface temperature

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POSSIBILITY TO DETECT DEGRADED RECYCLED MATERIAL IN THE MOULDED PARTS FROM PP

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201656

LUBOS BEHALEK, MARTIN SEIDL, JIRI HABR

Technical University of Liberec, Faculty of Mechanical Engineering, Department of Engineering Technology, Liberec, Czech Republic

e-mail: lubos.behalek@tul.cz

Abstract

In the frame of injection moulding production process not all raw material creates the final products and a waste material is generated (defective and rejected products, cold runners, etc.). This technological waste is very often reused in production, which reduces the final production costs, however, this regrind or regranulated material affects the final properties of the part. The negative impact of recycled material presence depends on the degree of chain cleavage of the polymer macromolecules caused by high temperature load. The deterioration of the product end-use properties does not have to be demonstrated immediately (or in a short time period) after the removal of the part from injection mould. However, the product service life can be dramatically reduced which is simulated in the technical practice as exposure of the product to elevated temperature for prolonged time periods. This paper is focused on experimental methods for detection of heat-damaged recycled material incorporated to the non-filled moulded parts made of polypropylene. For the purpose of the analyses the multipurpose test specimens type A (specified by ISO 3167 standard) were prepared under the conditions defined in ISO 1873-2 and ISO 294-1 standard (melt temperature, mould temperature, injection rate, holding time, cycle time, etc.). Subsequently, the melt was overheated within the injection unit which caused the heat-induced macromolecule cleavage. This material was used for production another specimens that were then grinded and added to the original (virgin) raw material in the wide range of concentrations (from 10 to 100 wt%). These final specimens were analyzed using the physical methods modified for engineering practice to determine morphological, rheological, thermal and physical-mechanical properties of the moulded parts.

Keywords: recycled material, polypropylene, rheological properties, mechanical properties, differential scanning calorimetry, induction oxidation time

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PROTOTYPE DEVELOPMENT OF A UNIQUE SERIAL KINEMATIC STRUCTURE OF MODULAR CONFIGURATION

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201659

JOZEF SVETLIK1, MIROSLAV STOFA1, MARTIN PITUK2

1Technical University of Kosice, Faculty of mechanical engineering, Department of Manufacturing machinery, Kosice, Slovak Republic

2Procesna automatizacia, Kosice, Slovak Republic

e-mail: jozef.svetlik@tuke.sk

Abstract

The authors are working closely the development of the prototype a unique serial kinematic structure of modular configuration. The prototype is developed in accordance with innovative ideas to develop a rotary linkage unlimited angle of rotation as the basic structural unit for such a kinematic motion structure. After verification of the prototype would be a proprietary idea of Universal Rotary Model (URM) to exercise in robotics as a basic building block movement of the robot or manipulator used mainly in industry eventually in the manufacturing technology utilizing unique and specific options suggested solutions. The article deals with the specifics of production documentation, available to select the optimum components, modifications and the effects of partial solutions, which together form a harmonious functional but extensible and modifiable whole.

Keywords: modular structure, construction design, serial kinematics, design optimization

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SIMULATION OF TECHNOLOGICAL PROCESS BY USAGE NEURAL NETWORKS AND FACTORIAL DESIGN OF EXPERIMENTS

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201662

ALENA VAGASKA1, PETER MICHAL2, MIROSLAV GOMBAR3,ERIKA FECHOVA1, JAN KMEC3

1Technical University of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Slovak Republic

2CCTo, Presov, Slovak Republic

3Institute of Technology and Businesses in Ceske Budejovice, Czech Republic

e-mail: alena.vagaska@tuke.sk

Abstract

The possibilities of simulation of technological process of aluminium anodic oxidation using the methodology of Design of Experiments (DOE) and theory of neural networks in order to monitor the anodizing process under various operating conditions are presented in this paper. The influence of chemical and physical input factors on the resulting AAO (anodic aluminium oxide) layer thickness at applied current density of 1 A•dm-2 and 6 A•dm-2 has been investigated. Based on the evaluation of experimentally obtained data, the computational predictive model describing the effect of individual input factors and their mutual interactions on the AAO layer thickness was developed in the form of cubic function. This model indicates which factors are important and how they combine to influence the response, it will enable us to optimize operating conditions. The most significant benefit of our research work in this field is the fact that all relevant factors were varied simultaneously.

Keywords: design of experiments, neural unit, predictive model, anodizing, layer thickness, factors

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SUSPENSION SYSTEM IN AUTOMOBILE SYSTEM

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201664

ANNA SMERINGAIOVA, IMRICH VOJTKO, BARBARA LESKOVA

Technical university of Kosice, Faculty of Manufacturing Technologies, Presov, Slovak Republic

e-mail: anna.smeringaiova@tuke.sk

Abstract

This paper is aimed on the possibility of modeling, simulation and diagnostics of the suspension system of passenger cars. A simplified dynamic model of the car suspension system is defined. The model transformation into the Matlab – Simulink environment is described for the purpose of suspension system performance analysis. Following are examples of modeling and simulation of vehicle suspension in Autodesk Inventor Professional and control of the technical condition of the vehicle shock absorber using the test equipment MAHA MSD 3000th.

Keywords: car, suspension system, modeling, simulation, dynamic model

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TEMPERATURE INFLUENCE ON THE CHANGE OF THE SANDWICH MATERIAL ADHESIVE PROPERTIES

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201666

JIRI SOBOTKA, PAVEL SOLFRONK, MICHAELA KOLNEROVA, LUKAS ZUZANEK

Technical University of Liberec, Faculty of Mechanical Engineering, Liberec, Czech Republic

e-mail: jiri.sobotka@tul.cz

Abstract

The automotive manufacturing represents one of the most developing segments of the engineering industry. The persisting tendency of designers to achieve the best technological level, car´s safety level and also ecological running at keeping the low price level means necessity to still implement into own production new types of materials. Among these materials also belong so-called sandwich materials which combine steel sheets with the plastic core. These materials are used in the car design due to their lower weight and excellent acoustic properties. As a disadvantage of such materials there is lower temperature stability and worse technological processability. This paper deals with the evaluation temperature influence on the change of the sandwich material mechanical properties. For tests there were selected the characteristic mechanical tests for different loading types in light of the adhesive properties testing – the lap shear test and the T-peel test. The range of the testing temperature was from -40°C up to 80°C and was chosen with respect to the commonly used criterions for temperature resistivity of parts designed for the car-body design.

Keywords: sandwich material, car-body design, material tests, temperature resistance, shear resistance

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THE DEFORMATION BEHAVIOUR OF HYBRID COMPOSITE SYSTEMS WITH THERMOPLASTIC MATRIXITLE

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201668

MARTIN SEIDL, LUBOS BEHALEK, JIRI HABR, PAVEL SEHNOUTEK

Technical university of Liberec, Department of Engineering Technology, Liberec, Czech Republic

e-mail: martin.seidl1@tul.cz

Abstract

Hybrid polymer composites are relatively new group of plastics that are rapidly developed. These materials combine high demands on the mechanical strength while keeping minimal density, thus generally opposing properties. Hybrid polymer composites have potentially very wide applicability, especially in aircraft or automotive industry where weight of the components is one of the critical parameters In the frame of this contribution the effect of individual components of multi-phase systems incorporated into thermoplastic matrix on resulting deformation processes was primarily analyzed. This study includes hybrid composites which are modified for the injection moulding technology. Test specimens for determining the mechanical properties (tensile, bending and Charpy impact) were made of nylon 66 with incorporated fibrous (glass fibres and carbon fibres) and particulate fillers (hollow glass beads / spheres).The final parameterization of individual process steps is very demanding by reason of the composite nature and hybrid structure.

Keywords: reinforced polymer s, hybrid composites, mechanical properties, glass fibres , glass spheres, carbon fibres

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TORQUE CHARACTERISTICS OF ROTARY PNEUMATIC MUSCLE ACTUATOR

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201673

MILAN BALARA, MARIA TOTHOVA

Technical University of Kosice, Faculty of Manufacturing Technologies with a seat in Presov, Slovak Republic

e-mail: maria.tothova@tuke.sk

Abstract

The control of the standard pneumatic muscle actuators is provided by increasing the air pressure in the one artificial muscle, while reducing the pressure in the second (antagonist) artificial muscle. The paper contains information about the control and basic properties of the rotary actuator based on pneumatic artificial muscles. It presents equations for the values of the actuator arm displacement depending on an input pressure; it shows the static characteristics of the actuator and the utilization of the muscle contraction. Pneumatic artificial muscles are connected in an antagonistic system through an oval centrally symmetric pulley. Due to the fact that with increasing rotating of actuator arm the torque decrease from the both artificial muscles; the stiffness of the actuator also decreasing in both directions. The proposed method of the present control in this paper has resulted in a small increase of torque of the rotary muscle actuator and thus adequate and symmetric stiffness of actuator.

Keywords: pneumatic muscle actuator, artificial muscle, antagonistic connection, stiffness, torque characteristic

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VARIANCES OF THE MECHANICAL PROPERTIES OF FILLED POLYMER MATERIALS IN A VARIATION OF INJECTION MOULDING INPUT PARAMETERS

MM (Modern Machinery) Science Journal, September_2016

DOI: 10.17973/MMSJ.2016_09_201674

VACLAV CONTOS

WITTE Automotive, Nejdek, Czech Republic

e-mail : vaclav.contos@witte-automotive.cz

Abstract

Continuum (filled polymer) is inhomogeneous and anisotropic. The Continuum is used in an injection moulding simulation at first (generally unnewton type of fluid). Then the continuum is solid (after cooling) and it is possible to carry out ordinary structural analysis with it. The solid continuum has different mechanical properties for each of discrete elements. A consequent stress field will generally have different values when influence of injection moulding is taken into account for analyses.

Keywords: fiber orientation, injection moulding, rheology, structural analysis, FEM, mesh

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