Modern Machinery (MM) Science Journal, March 2018

END MILLS WITH PCD INSERTS SHARPENED BY DIFFERENT ELECTRICAL TECHNOLOGIES

TOMAS TRCKA, ALES POLZER, JOSEF SEDLAK
Keywords: EDM-G | WEDM | analysis of sharpened inserts | force loading | PCD

Initially a natural diamond was used for cutting, but it was successively replaced by an man-made - synthetic diamond. Its application is limited only on non-ferrous materials, but also considering this limitation it is a very important cutting material. The most suited material based on diamond for milling operations is PCD - a synthetic polycrystalline diamond produced by HPHT (high-pressure hig (…)

IMPROVING BUSINESS PROCESSES USING SIMULATION TOOLS

RICHARD WOROBEL, JURAJ CAPEK, LUCIA KOVACOVA, PETER BUBENIK, MARTIN KRAJCOVIC
Keywords: performance improvement | Simulation | business processes | modeling

The article describes how to improve business processes by using modeling and simulation tools. A dynamic business environment requires continuous improvement of business processes. By using process improvement tools, the enterprise gains insight into ongoing processes, which is the basic requirement for a planned change. The simulation tools provide professionals with the opportunity to build var (…)

ABRASIVE WATER JET DRILLING OF COOLING HOLES IN AEROENGINES: PRELIMINARY EXPERIMENTAL STUDY

PETR HLAVACEK, TOMAS ZLAMAL, LIBOR SITEK
Keywords: thermal barrier coating | drilling | abrasive water jet

This paper addresses an experimental investigation on the feasibility of using abrasive water jet (AWJ) for the drilling of small-diameter holes in aeroengines components. These components are sprayed with ceramic thermal barrier coating (TBC). The required holes are typically 0.5 to 1 mm in diameter with a drilling angle of 30 to 90 deg. The parameters of the AWJ were varied to study their effect (…)

ANALYSIS OF TURNING MOTION FOR DEVELOPING A BUTTERFLY-STYLE FLAPPING ROBOT

YUTA OZAWA, TARO FUJIKAWA, KOKI KIKUCHI
Keywords: rotational direction of an actuator | swept-forward angle | asymmetric wings | turning flight | butterfly | small flapping robot

In this study, to achieve turning flight of a butterfly-style flapping robot, we first analyzed the flight of a butterfly and then performed flight experiments using flapping robots. Flight analysis of a butterfly revealed difference between the left and right lead-lag angles during yaw turning flight. Based on analysis result, the two cases of flight experiment were performed in terms of the rota (…)

DIAGNOSTICS OF SELECTED SURFACE CHARACTERISTICS WITH LASER PROFILOMETRY

JURAJ RUZBARSKY, GERHARD MITAL
Keywords: parameters | technology | measurement | surface | non-contact | Laser | roughness | profilometry

The paper is focused on the quality evaluation of the surface using the LPM laser profilometer. The measured sample was manufactured by Mitutoyo, Japan with surface roughness 2.94µm. The main goal was proper adujstment of the internal gain of the camera video signal (Gain mode) which affects the quality of the measured data. Measurement and evaluation show that the laser profile mode selection has (…)

IMPROVING MANAGEMENT OF THE COMPANY THROUGH CRANFIELD PROCESS MODEL

ELENA DRABIKOVA, JOZEF SVETLIK
Keywords: benefits realization process | benefits dependency network | benefits | project management | Cranfield process model

Performance of the company, regardless of the market sector where carries out its business, is closely linked to company's management processes at every level. The present paper is dedicated to the improvement concerning company management field. Significant and increasingly important part of the management process is project management. There may be considered two fundamental approaches - output (…)

BASICS OF DESIGNING MAINTENANCE PROCESSES IN INDUSTRY 4.0

MIROSLAV FUSKO, MIROSLAV RAKYTA, MARTIN KRAJCOVIC, LUBOSLAV DULINA, MARTIN GASO, PATRIK GRZNAR
Keywords: systems designing | technical service | smart maintenance | steps for designing | digitization | maintenance

This paper deals with a new research of designing proactive maintenance processes for the Fourth Industrial Revolution, the so-called Industry 4.0. The mission and position of maintenance in a modern managed factory is highlighted by the fact that maintenance is one of the major processes that affect production productivity. In the near future, whatever is possible to digitize will be digitized, a (…)

EFFECTS OF WATER JETS ON CNTS/CONCRETE COMPOSITE

VLADIMIR FOLDYNA, JOSEF FOLDYNA, DAGMAR KLICHOVA
Keywords: material removal | continuous and pulsating water jet | CNTs/concrete composite

Results of the resistance of carbon nanotubes concrete composite (CNTs/concrete composite) to the action of pulsating and continuous water jets are presented in this paper. This work brings advanced results of fully hydrated CNTs/concrete composite (after 28 days) and it follows up the research of this composite hydrated 7 days. The experiments were focused on the determination of erosion effects (…)

DEVELOPMENT OF PRODUCT WHILE CONSIDERING MATERIAL FLOW IN A PRODUCT’S LIFE

MARIA URBAN, FRANTISEK MANLIG
Keywords: product development | Design for Supply Chain (DfSC) | Design for Ecology (DfE) | Desing for Sustainability (DfS) | Design for Logistic (DfL) | Design for Assembly (DfA) | Design for Manufacturing (DfM)

The goal of this article is to demonstrate the dependencies between product development and material flow. The first part provides a compressed introduction to the topic. From the perspective of development, so called DfX (Design for X) approaches and methods are discussed as well as their possible influence on the business process, especially on the material flow. The purpose of this part is to p (…)

DIGITIZATION IN THE TECHNICAL SERVICE MANAGEMENT SYSTEM

MIROSLAV FUSKO, MIROSLAV RAKYTA, LUBOSLAV DULINA, IVANA SULIROVA, MILAN EDL
Keywords: information | new trends | sustainability | management system | technical service | maintenance | digitization

The aim of this paper is to focus on digitization and its disrupting effects on production, using innovative approaches. The article shows how and where to start with digitization in plants. Nowadays, the term technical service management system digitization is gaining in prominence. New concepts, information and communication technologies (ICT) change the overall view of and the approach to produ (…)

DISCRETE EVENT SIMULATION USAGE TO MODEL AND OPTIMIZE THE PRODUCTION LINE

MARTINA KUNCOVA, MICHAELA ZAJONCOVA
Keywords: SIMUL8 | routers | production line | Production Process | simulation model

Simulation models are usually used in situations where complex or complicated systems and processes need to be analyzed. The main advantage of the simulation modelling is the fact that it is realized in virtual reality (in simulation software) without the necessity to change the real processes. In this article the process of the model creation, verification and validation is described on the examp (…)

EFFECT OF LOW BETA IRRADIATION DOSE ON MECHANICAL PROPERTIES OF SURFACE LAYER OF INJECTION MOULDED POLYAMIDE 11 (PA 11)

DAVID MANAS, MIROSLAV MANAS, LENKA GAJZLEROVA, MARTIN MIZERA
Keywords: surface layer | micro-mechanical properties | micro-hardness | cross-linking | Polyamide 11 (PA 11)

The influence of high doses of beta radiation on the changes in the structure and selected properties (mechanical and thermal) polymers were proved.  Using high doses of beta radiation for polyamide 11 (PA 11) and its influence on the changes of mechanical properties of surface layer has not been studied in detail so far. The specimens of polyamide 11 (PA 11) were made by injection moulding techno (…)

MATHEMATICAL FORMULATION OF THE KINEMATIC EQUATIONS FOR THE CONTROL OF THE ROBOT SYSTEM WITH APPLICATION FOR THE MACHINING CONICAL SURFACES

STEFAN GASPAR, JAN PASKO
Keywords: inverse problem | transform matrix | orientation of a robot end element | conical surface | robotic mechanism

With the performance of various technological operations (welding, machining, etc.) it is necessary that the end member of a robot moves along the defined path and, at the same time, the tool fulfils certain criteria in relation to the machined surface. The aim of the article is to apply theoretical knowledge to derivation of kinematic equations of a robotic mechanism control, i.e. to the solution (…)

DESIGN OF THE TOOL FOR PRESSING OF TARPAULIN GROMMETS

JAN ŘIHÁČEK, KAMIL PODANÝ, MAREK HUDEČEK
Keywords: DX51D+Z275MAC steel | numeric simulation | ANSYS Workbench | punching | expanding | tarpaulin grommet

This paper deals with a design and a shape optimization of a tool that combines punching of a tarpaulin with the tarpaulin grommet pressing in one operation. The tarpaulin grommet 0.5 mm thick with a diameter of 10 mm is made of DX51D+Z275MAC steel. The designed tool and its main shape dimensions are verified by using a numerical simulation in an ANSYS Workbench software and subsequently also by a (…)

OPTIMIZATION OF PARAMETERS OF THE PLASTIC-COATED SHEETS AT THE CORROSION TEST IN SALT SPRAY

JOZEF KMEC, ERIKA FECHOVA, STELLA HREHOVA
Keywords: RSM - Response Surface Methodology | optimization of parameters | corroding time | test in salt spray chamber | plastic-coated sheets

The paper deals with optimization of parameters obtained by corrosion test in a salt spray chamber at plastic-coated sheets, which are used in various areas of economy, e.g. automotive industry. The goal of the experiment was to find out the relation between input parameters (Zn layer, Top+primer, Backout) and output parameter – corroding time by means of Response Surface Methodology (RSM). The ex (…)

OPTIMIZATION OF SELECTED PROCESSES IN A COMPANY WITH THE SUPPORT OF THE LEAN CONCEPT

KATERINA MARSIKOVA, EVA SIROVA
Keywords: optimization | organization | process management | lean administration | lean

The aim of the paper is to present the importance of management and optimization of administrative processes in a company with the support of the Lean concept. The research part deals with the most popular approaches in business process management using lean manufacturing and the methods and tools used to improve production processes within this trend. The case study focuses on the issue of admin (…)

STRUCTURAL MODIFICATION IMPACT ANALYSIS OF SELECTED COMPONENTS OF SHIELDING EQUIPMENT USING RAPID PROTOTYPING TECHNOLOGY

TOMAS CORANIC, STEFAN GASPAR, JAN PASKO
Keywords: mechanical properties | shielding equipment component | 3D Print | FDM | rapid prototyping

The aim of the paper is to analyze the impact of selected components of shielding equipment using Rapid Prototyping technology. Mechanical properties of selected components of shielding equipment will be analyzed using computer simulation in Autodesk Inventor. Based on carried out analysis of the individual alternative will be produced prototypes of shielding components by FDM technology (Fused De (…)

ASPECTS AFFECTING ACCURACY OF OPTICAL 3D DIGITIZATION

RADOMIR MENDRICKY
Keywords: Atos | Acceptance test | Inspection | Measurement accuracy | calibration | 3D scanner | D optical digitizing

Use of optical 3D digitization for dimensional and shape inspection of work-pieces has increased during the last few years. However, the quality of data obtained by scanning may be affected by many factors. Digitization accuracy of optical 3D scanners is generally determined by Acceptance Tests compliant with the VDI / VDE 2634 standard. When performing the validation test, all variables and measu (…)

AN ORTHOPAEDIC MATTRESS WITH STIFFNESS CONTROL OF PNEUMATIC ELEMENTS

RADEK VOTRUBEC
Keywords: sleep quality | orthopaedics | microprocessor | pur foam | pneumatic systems | vibroisolation

This paper deals with stiffness control of orthopaedic mattresses. There are several pneumatic elements inserted into the body of the mattress. Pressure transducers measure pressure in the elements. Pneumatic valves control input and output air flow. All components including a compressor are inserted in the bed. The initial control algorithm was designed in LabVIEW. The final solution is realized (…)

MECHANICAL PROPERTIES OF LOW DENSITY POLYETHYLENE (LDPE) IRRADIATED BY LOW DOSES BETA IRRADIATION MEASUREMENT BY ULTRA NANOINDENATION TEST

TOMAS FIALA, DAVID MANAS, MIROSLAV MANAS, LENKA GAJZLEROVA
Keywords: surface layer | ultranano-hardness | cross-linking | low density polyethylene (LDPE)

The influence of low doses of beta radiation on the changes in the structure and selected properties (mechanical and thermal) polymers were proved.  Using low doses of beta radiation for low density polyethylene (LDPE) and its influence on the changes of mechanical properties of ultra nanohardness has not been studied in detail so far. The specimens of low density polyethylene (LDPE) were made by (…)

AUXILIARY DEVICE FOR ACCURATE MEASUREMENT BY THE SMARTVISION SYSTEM

KAMIL ZIDEK, VLADIMIR VASEK, JAN PITEL, ALEXANDER HOSOVSKY
Keywords: Measuring | vision systems | automation

The article deals with the design of equipment for accurate measurement or checking linear dimensions using a smart vision system. Commercial smart vision systems can not accurately measure large linear dimensions because the precision of the camera sensor decreases with distance from measured object. The main benefit of the proposed solution is the possibility of continuous measuring in productio (…)

STUDY OF GASEOUS FLOWS IN CLOSED AREA WITH FORCED VENTILATION

MIROSLAV RIMAR, MARCEL FEDAK, ANDRII KULIKOV, PETER SMERINGAI
Keywords: ANSYS | recuperation | heating | ventilation | heat recovery ventilator

According to the latest researches there are no doubts about the influence of indoor air temperature on the human body. In the current work was made simulations of heating the laboratory in the winter period by heat recovery ventilator (HRV) and combined system of HRV and floor radiators. According to our research it is better to use multi heating systems in terms of comfort people being. It is po (…)

PRELIMINARY INVESTIGATION OF STATIC AND DYNAMIC HYSTERESISOF DMSP-5 FLUIDIC MUSCLE

ALEXANDER HOSOVSKY, SERGEJ HLOCH, JOZEF JURKO, ANTON PANDA, MONIKA TROJANOVA
Keywords: loop formation | pneumatic artificial muscle | muscle displacement | muscle pressure | non-local hysteresis

Pneumatic artificial muscles are pneumatic actuators with elastic structure distinctive for their nonlinear characteristics and hysteresis. In the paper we concentrate on the investigation of hysteresis in one of the recent types of fluidic muscles (DMSP-5). The main objective is to examine the hysteresis with respect to its rate-independence as well as its nonlocality. We used two types of excita (…)

AIR COATED ABRASIVE SUSPENSION JETS UNDER SUBMERGED CONDITION

SEIJI SHIMIZU, GUOYI PENG, YASUYUKI OGUMA
Keywords: pulsation | high-speed observation | air coated jet | submerged cutting | abrasive suspension jet

In order to improve cutting capability of a submerged abrasive suspension jet (ASJ), a ventilated sheathed nozzle for producing an air coated ASJ has been developed. Cutting characteristics of air coated ASJs under submerged condition are provided by cutting tests with specimens of aluminium alloy. Unsteady behaviour of the air coated layer around the jet is also investigated by high speed observa (…)

ABRASIVE WATERJET AS A PART OF INDIRECT PROCESS CHAIN FOR MICROMIXER MANUFACTURING

JOSKO VALENTINCIC, ANDREJ LEBAR, MARTIN VADNU, MARKO JERMAN, PAVEL DRESAR, IZIDOR SABOTIN
Keywords: lab on a chip | micromixer | casting PDMS | EDM | AWJ

Microproduction-based lab-on-a-chip technologies have recently been substantially advanced and have become widely used in various multidisciplinary research fields, including biological, (bio-) chemical, and biomedical fields. A key factor in microproduction is micro tooling. For mass production it is of paramount importance to produce tools from materials with excellent mechanical properties, thu (…)

POSSIBILITIES OF PERFORMANCE MEASUREMENT OF COMBUSTION ENGINES

DANIEL MADER, MARTIN PEXA, BOHUSLAV PETERKA, MAREK DVOŘÁK, MARTIN KOTEK
Keywords: dynamometer | power | torque | engines speed | performance parameters | combustion engine | biofuels

The paper deals with performance measurement of combustion engines. Currently, in combustion engines is not used only fuel from fossil fuel (diesel, gasoline), but also the fuel of biological origin. Due to most engines are designed for fossil fuels, it is possible to expect a reduction of power parameters (lower calorific value of fuel) of biofuels. Whether the vehicle (tractor) fulfill the opera (…)

PRODUCTION BY FDM METHOD RP TECHNOLOGY FROM PLA ECO-MATERIALS EXTRUDED HORIZONTALLY IN LENGTH

ANTON PANDA, EMA NOVAKOVA-MARCINCINOVA, LUDMILA NOVAKOVA-MARCINCINOVA, TADEUSZ ZABOROWSKI, IVAN MRKVICA
Keywords: 3D model | PLA –PolyLacticAcid | fused deposition modelling | PLA eco-materials | rapid prototyping

The authors in their article are devoted to describe the samples production of sophisticated eco-material PLA -PolyLacticAcid extruded horizontally in length, produced by FDM method, Rapid Prototyping. Carried out experimental tests of mechanical properties are presented by the authors in this article. Also in this article eco-materials outputs tested are presented in patterns, measurement protoco (…)

NEW ASPECTS OF MAINTENANCE MANAGEMENT AND THE MATERIAL OF SPARE PARTS

VERA PELANTOVA, PETR CECAK
Keywords: organisation | production | innovation | ; Industry 4.0 | material | spare parts | maintenance

The ensuring of a continuity and a quality of the production leads a part of organisations to think about the status quo of maintenance of their equipment. The maintenance also depends on types of spare parts. The management often perceives only production characters. However, current knowledge points to a deeper interdependence. This article describes practical experience with maintenance issues. (…)

TESTING DIFFERENT EVOLUTION STRATEGY SELECTION STRATEGIES

PAVEL RASKA, ZDENEK ULRYCH
Keywords: objective function | simulation optimization | discrete event simulation models | selection strategies | evolution strategy

The paper deals with testing different selection strategies of Evolution Strategy on different discrete event simulation models. The models reflect real production systems in industrial companies. We specified different objective functions of models considering the simulated system. All possible solutions and their objective function values were mapped to find the global optimum in the search spac (…)

LOGISTICAL MEASUREMENT STRATEGY ON COORDINATE MEASURING MACHINES AS A TOOL FOR THE REPRODUCIBILITY OF RESULTS

NAQIB DANESHJO, MARIAN KRALIK, ENAYAT DANISHJOO
Keywords: Taguchi methods of experiment design | measurement system analysis (MSA) | logistical measurement strategy | CAD design models | measuring machines (CMM)

This paper examines the impact of a selected logistical measurement strategy on coordinate measuring machines for the reproducibility of measurement results. Optimising the reproducibility of measurement results is one of the basic requirements in the process of verifying the quality of components between organisations, workplaces and processes. Selected measurement strategy and logistics selected (…)

THE POSITION OF THE JOINTS WITH ANGLE OF 900 AT FRICTION STIR WELDING (FSW)

WIDIA SETIAWAN, DJAROT B. DARMADI, WAHYONO SUPRAPTO, RUDY SOENOKO
Keywords: Aluminum 6061 | Feedrate | Corner –Butt | Corner-Butt Joint 450 | Friction Stir Welding

This research was use aluminum 6061 with 150 mm length, 50 mm wide, and 10 mm thick. The probe was made from EMS 45 simple design. Three variations used of feedrate speed  is 10 mm/min, 15 mm/min, and 30 mm/min. Spindle rotation constantly set 2000 rpm, the heat generated was recorded. Corner-Butt (C-B)joint determined, the lowest heat generated from 2200C-3200C and the tensile test was60 MPa. The (…)

ELECTRON BEAM IRRADIATED POLYAMIDE MEASURED BY INDENTATION HARDNESS

MARTIN OVSIK, MICHAL STANEK, VACLAV JANOSTIK, MARTIN REZNICEK
Keywords: indentation | nano-hardness | cross-linking | electron beam | polyamide

Cross-linking is a process in which polymer chains are associated through chemical bonds. Radiation, which penetrated through specimens and reacted with the cross-linking agent, gradually formed cross-linking (3D net), first in the surface layer and then in the total volume, which resulted in considerable changes in specimen behaviour. This research paper deals with the utilization of electron bea (…)

CHARACTERISATION OF ALOE VERA AS CUTTING FLUIDS

PRIYAGUNG HARTONO, - PRATIKTO, AGUS SUPRAPTO, YUDY SURYA IRAWAN
Keywords: flankwear | turning process | aloe vera | cutting fluids

Cutting fluids provide a challenge to reduce environmental effects. This study discusses aloe vera cutting fluid (AVCF) as an environmentally friendly alternative to oil-based cutting fluids mixed with water 1:5 (OBCFM). A turning process with low cutting speed (20.232 m/min) requires high cooling power. The turning process was conducted(cutting speed:20.232 m/minute, feed rate: 0.24 mm/rev, and c (…)

DETERMINATION OF MEASUREMENT UNCERTAINTY ON CMM SIOS NNM-1

JAN SRAMEK, ROBERT JANKOVYCH
Keywords: coordinate measuring machine | nanometrology | substitution method | multi-position method | length measurement | measurement uncertainty | ruby ball

This paper focuses on determination of uncertainty and individual contributions to the measurement uncertainty on the nano-CCM NNM-1 instrument fitted with the touch-probe scanning system Gannen XP. Ruby ball diameters with various nominal diameters are used as the measured objects. Two main methods to determine the measurement uncertainty, the substitution and multi-position methods are addressed (…)

THE MODERN STORAGE EQUIPMENT WITH EMPHASIS ON INNOVATIONS AND RISKS

VERA PELANTOVA, EVA SIROVA
Keywords: organisation | industry 4.0 | risk | innovation | automation | store | storage equipment

A lot of the research space is devoted to the design and the use of major production equipment in publications. Minor equipmentis neglected. Large stocks are in decline from a managerial position. However, their new role is shown due to changes in the substantial neighbourhood. The article deals with the important issue of the storage equipment in connection with the automation. The case study s (…)

EVALUATING THE EFFICIENCY OF LEAN MANAGEMENT PROJECTS USING DATA ENVELOPMENT ANALYSIS

EVA STICHHAUEROVA, NATALIE PELLONEOVA
Keywords: technical efficiency | project success | project efficiency | lean management project | data envelopment analysis

This paper describes approach to evaluate and compare efficiency of lean management projects, using a set of techniques known as Data Envelopment Analysis. DEA is a non-parametric linear programming method used to the efficiency evaluation of decision making units. Lean methods have been widely used as a tool for improving operational performance and also have been successfully implemented in many (…)

SAFETY METRICS OF PERFORMANCE FOR SMALL AND MEDIUM-SIZED ENTERPRISES – CASE STUDY

LUBOS KOTEK, ALES NOSEK, VOJTECH BARTOS
Keywords: safety indicator | process safety management | risk management | performance of processes | safety metrics

To systematically reduce workplace safety risks and improve business performance, the principle of continuous improvement is usually used. It is based on the selection of objectives and subsequent monitoring of their fulfilment using key performance indicators in the given area, in the field of safety this means safety metrics. These, therefore, serve to constantly monitor the state of the organis (…)