MM Science Journal, March 2021

March 2021

ANALYSIS OF TEST PLASTIC SAMPLES PRINTED BY THE ADDITIVE METHOD FUSED FILAMENT FABRICATION

Josef Sedlak, Denisa Hrusecka, Eva Jurickova, Lucie Hrbackova, Lukas Spisak , Zdenek Joska
Keywords: 3D printing | PLA | filament production | coloring additive | tensile test | hardness test | surface texture

The presented paper deals with the influence of coloring additives and the setting of process parameters of 3D printing on the mechanical and surface properties of samples made of PLA material. The paper characterizes the process of filament production, as well as the printing of normalized samples on a 3D printer using the additive method Fused Filament Fabrication (FFF). The effect of 3 types of color (…)

A FRAMEWORK FOR A LOGISTICS 4.0 MATURITY MODEL WITH A SPECIFICATION FOR INTERNAL LOGISTICS

Michal Zoubek, Michal Simon
Keywords: Logistics 4.0 | industry 4.0 | internal logistics | maturity | model | manipulation

We understand the maturity of an industrial enterprise in the context of the fourth industrial revolution as the state of the of internal and external conditions that support basic concepts of Industry 4.0 such as vertical and horizontal integration of production systems and enterprises or digital integration of engineering throughout the value chain. The ongoing trends of digitization and automation ar (…)

WELDED RIBBED MANHOLE COVER – FEM ANALYSIS AND PROTOTYPE TESTING

Martin Habrman, Zdenek Chval, Vojtech Riedl
Keywords: Manhole cover | ribbed – welded construction | pressure loaded | finite element method

In this paper, in order to achieve the required properties, several numerical simulations of pressure loading of the welded manhole cover are performed. The analysis of displacement and stress using the finite element method in the software NX Siemens 12 were conducted. Verification of numerical results was done by performing prototype testing consistion of the permanent deformation test and a loading c (…)

MICROSTRUCTURAL OBSERVATIONS OF AM DEPOSITED 15-5PH – STELLITE SAMPLE

Jaroslav Vavrik, Pavel Salvetr, Miroslav Urbanek, Josef Hodek, Michal Brazda, Miloslav Bily
Keywords: additive manufacturing | Directed Energy Deposition | Stellite | Microstructure | transitional area

AM (Additive Manufacturing) is an increasingly widespread technology in the world. This technique was used in the present work to deposit material on the baseplate in order to find out its ability to repair damaged parts (baseplate material). The material of the baseplate was AKT1TD martensitic steel used in the aviation and energy industry. The steel could suffer from corrosion and erosion, and AM coul (…)

NEW DIDO BUS USED IN A SPECIAL AND HARD INDUSTRY CONDITION

Leos Beran, Tomas Myslivec
Keywords: serial bus | asynchronous | PLC | digital input/output | hard conditions | automation | carbon brush

This paper presents a new serial asynchronous Bus, using standardized digital input and output from a PLC system for the hardware layer. The data frame and time setting are described to illustrate the need to establish a new serial bus for study. Our selected implementation within a warehouse robot is presented as our industrial case study. It is our study case in the industry. This presented bus can be (…)

EFFICIENT PARAMETERIZATION OF THERMO-ELASTIC CORRECTION MODELS FOR EXTERNALLY DRIVEN SPINDLES

Christian Brecher, Alexander Steinert, Robert Spierling, Stephan Neus
Keywords: thermal issues | thermal error compensation | Spindle | thermo-elastic simulation

In modern machine tools, spindle units significantly contribute to thermo-elastic tool center point (TCP) errors. Correction models to compensate axial spindle expansion are currently based on linear temperature models. Despite existing expert knowledge of spindle manufacturers, considerable modelling effort and empirical studies are required to parametrize appropriate models. As a result, the experimen (…)

REMOVABLE MOUNTING OF THE ROLLING MACHINES’ WORKING ROLLS

Jan Hlavac, David Vydrzel, Jiri Dekastello, Karel Glatz, Martin Volejnicek, Petr Gavenda
Keywords: Rolling Machine | Cross-wedge Rolling | CAE | Shaft Connection | stiffness

The work is focused on the design solution of fixing the exchangeable working rolls into cross-wedge rolling machine. The tools are clamped to the cylinders. In case of technology change, the tools must be replaced. Tools can be changed directly on the machine, this is a non-productive time. Another way to change tools is to replace entire cylinders. The diameter of the rollers is large, so the rollers (…)

SW TOOLS FOR STRUCTURAL DESIGN OF PROFILES, CONSIDERING ITS STABILITY

Tomas Kalina, Martin Kratochvil, Filip Hrdlicka, Ivana Mazinova
Keywords: Buckling | Cross-section shape | Material efficiency | Materials selection optimization | Numerical optimization | Shape factor

When designing lattice structures, or even structures in general, standard profiles are often used. These are profiles of I, U, T, L, SHS, RHS, CHS, EHS shapes, etc. All the basic formulas for stiffness and strength calculations are known for standard used profile shapes. However, in established practice there are no approaches for simply optimization or for evaluating the stability of profiles. This pa (…)

MODEL OF SMART FACTORY USING THE PRINCIPLES OF INDUSTRY 4.0

Martin Sevic, Petr Keller
Keywords: industry 4.0 | smart factory | autonomous system | Internet of Things (IoT)

The article deals with the created model of a smart factory using the principles of Industry 4.0. It is the creation of an autonomous manufacturing system, which combines into one unit the means of production, such as machines, handling units, warehouses, etc., as well as human resources and information flows. The manufacturing system is not centrally controlled, but each unit has its own control system (…)

A NEW WAY TO DESIGN SOFTWARE FOR INDUSTRIAL AUTOMATION - 3D PRINTER CEMENT MIXTURES

Martin Vojir, Tomas Myslivec, Tomas Petr, Josef Brousek, Leos Beran, Martin Diblik, Petr Keller, Daniel Kajzr, Robert Vozenilek
Keywords: automation | cement

This paper presents a new way of developing machine software for the automation industry. This example focuses on a 3D printer intended for printing cement mixtures. The mechanical and electrical construction is shown for clarification. New mappTechnology by a company called B&R is explained, highlighting its benefits t for software developers. Both the advantages and disadvantages are discussed at the end.

SENSING RAIL SYSTEM WITH PIEZOELECTRIC ELEMENTS

Zdenek Machu, Filip Ksica, Zdenek Hadas, Martina Kratochvilova, Jan Podrouzek
Keywords: piezoelectric | PVDF | MFC | Strain Sensor | Rail | deformation | monitoring |   Mg alloy | AA5083

This paper deals with piezoelectric strain measurement for rail monitoring applications. Piezoelectric materials under mechanical load generate electric charge and thus provide active voltage response. Mechanical parts with piezoelectric sensing layers could provide electrical signal which is proportional with mechanical loads and vibration. Presented piezoelectric system in the form of a macro fiber co (…)

EXPERIMENTAL ANALYSIS OF TEMPERATURE RESISTANCE OF 3D PRINTED PLA COMPONENTS

Jiri Suder, Zdenko Bobovsky, Jakub Mlotek, Michal Vocetka, Zdenek Zeman, Michal Safar
Keywords: annealing | fused filament fabrication | Glass Transition Temperature | Heat Deflection Temperature | additive manufacturing | Polylactic Acid

PLA is one of the most widely used materials in additive technology, especially in the Fused Filament Fabrication method. However, its use is limited by its relatively low-temperature resistance. The glass transition temperature of PLA is around 60 °C. Some studies already performed on the annealing of 3D printed plastics have shown their increased heat deflection temperature. However, the interpretatio (…)

ALTERNATIVE SOLUTION OF A MILLING HEAD HOUSING USING THE COMPUTER AIDED SYSTEMS

Vaclava Lasova, Petr Bernardin, Marcel Svagr, Jiri Kubicek
Keywords: Finite element model | stiffness analysis | bearing | housing | Spindle | Guayan reduction | Static condensation | topology optimization

The aim of this work was design of alternative solution of milling head housing with help of topology optimization. Mechanical properties of new alternative housing solution (specifically a stiffness) are based on the existing milling head IFVW10x manufactured by the ŠMT a.s. company. The stiffness of existing milling head was determined using KISSsys calculation software, as well as the stiffness of th (…)

ANALYSIS OF THE ACCURACY OF VIRTUAL CLAMPING IN THE FIELD OF 3D SCANNING

Radomir Mendricky, Vladimir Kafka
Keywords: Virtual clamping | 3D digitisation | optical 3D scanner | 3D measurement | ATOS TripleScan | measuring jig | accuracy

When measuring large and flexible parts, specialised measuring and clamping jigs are used as the standard, which fix the part to the required position. However, because the production of such jigs is time consuming and very expensive, software tools have recently started to appear on the market, which allow even large flexible parts to be measured in a free state and to use so-called virtual clamping fo (…)

ANALYSIS OF THE INFLUENCE OF INTERCALATED MONTMORILLONITE ON HOMOGENIZATION OF PP/PA-6 NANOCOMPOSITE IN MELT

Volodymyr Krasinskyi, Ludmila Dulebova, Oleh Suberlyak, Emil Spisak, Marko Pankiv
Keywords: polypropylene | polyamide | montmorillonite | polyvinylpyrrolidone | nanocomposite | Structure | scanning electron microscopy

The relationship between the structure, physical-mechanical, and elastic-deformation characteristics of newly formed nanocomposites based on a mixture of PP/PA-6 (Polypropylene/polyamide-6) with montmorillonite (MMT), which was modified with polyvinylpyrrolidone (PVP), is investigated in this work. The influence of the content of modified PA-6 on the nature of its distribution in the polymer matrix of P (…)