Manufacturing Technology Journal, 2023 (vol. 23), issue 2
Analysis of the Substitutability of Conventional Technologies in the Design of a Clamping Vise for Measurement Using an Optical Measuring System
Miroslav Cedzo, Jozef Holubják, Tatiana Czánová, Pavol Timko, Peter Kozový, Mário Drbúl
Manufacturing Technology 2023, 23(2):136-142 | DOI: 10.21062/mft.2023.028 
The work deals with the possibility of using additive technology in the production of positioning and clamping device. The designed clamping device will facilitate and accelerate the measurement of samples with inclined or different irregular surfaces. The designed device is manufactured by additive technology using composites. Onyx material reinforced with Kevlar fibers was used as material for composite printing. The designed device should achieve the required properties for the firm and stable clamping of the components during the measurement process, and its weight should be significantly reduced with the use of composite material.
Investigation and Measurement of Nanomechanical Properties of the HSS Powder Metallurgy ASP2017 and ASP2055 Steels
Jana Escherová, Juraj Majerský, Jozef Majerík, Igor Barényi, Henrieta Chochlíková
Manufacturing Technology 2023, 23(2):143-152 | DOI: 10.21062/mft.2023.022
The intention of the team of authors in the presented scientific article was experimental measurement with subsequent evaluation of nanomechanical properties of selected microstructural components of the investigated high-speed steels type ASP2017 and ASP2055 produced by powder metallurgy. The whole experiment was performed under laboratory conditions on an experimental apparatus called Hysitron TI 950 Triboindeneter. The used device is a part of the laboratory equipment of the Center for Diagnostics and Quality Testing of Materials. The proposed process of experimental research of the mentioned properties of PM steels was carried out precisely because...
Effect of Laser Traverse Speed during Laser Hardening on Hardness Distribution and Microstructure of Hot Work Tool Steel H11
David Hradil, Zbyšek Nový, Josef Hodek, Martina Koukolíková, Adam Szyszko
Manufacturing Technology 2023, 23(2):153-160 | DOI: 10.21062/mft.2023.021
The paper describes the effect of laser traverse speed during laser hardening on hardness and micro-structure. The experimental material is hot work tool steel AISI H11 with samples sized 100×100×35 mm. The initial state of the material before laser hardening is quenched and tempered. The laser hardening temperature is constant at 1100 °C, selected laser traverse speed was 1, 2, 4, and 6 mm/s. A numerical simulation performed in DEFORM-3D software before the experiment showed tendencies of temperature displacement and expected course of hardness. Increasing traverse speed leads to de-creased laser-hardened depth and decreased hardness drop in the heat-affected...
Use of Electron Microscopy in the Analysis of the Influence of Roughness on the Corrosion Behavior of Selected Ti Alloys
Iryna Hren, Sylvia Kuśmierczak, Roman Horký
Manufacturing Technology 2023, 23(2):161-176 | DOI: 10.21062/mft.2023.017
Titanium alloys are among the biocompatible materials that are used for biomedical implants. From the point of view of the reactivity of the human body, it is important to know the state of the surface of these materials, which in technical practice is represented by the term surface integrity, which includes a complex of evaluated properties. One of the classic approaches is the evaluation of the surface roughness and the properties of the stable oxide layer, which influence the formation of the connection of the implant with human tissues and influence its acceptance. Another frequent approach is the use of optical metallography, especially for the...
Design of Dual-Head 3D Printer
Vlastimil Chalupa, Michal Stanek, Jiří Vanek, Jan Strnad, Martin Ovsik
Manufacturing Technology 2023, 23(2):177-185 | DOI: 10.21062/mft.2023.032
Fused Filament Fabrication (FFF) printers are usually designed to create a product with one single ma-terial. Some of them allow fabricate items in multiple colours but creating a single product consisting of two different materials remains an advantage of industrial 3D printers only. The aim of this research was to develop a design of a device with two printheads which enables to print products with two different materials, compatible with a cheap and commonly available FFF device Prusa i3MK2S, and the subse-quent production of a prototype. A key aspect of the design was the hardware compatibility of the device with the given printer while maintaining...
Influence of Structural State prior Quenching in Spring Steel
Jakub Kotous, Pavel Salvetr, Daniela Nacházelová
Manufacturing Technology 2023, 23(2):186-193 | DOI: 10.21062/mft.2023.018
Various structure states before quenching significantly influence final mechanical properties as well as the dispersion of chemical composition at the same steel grade. Therefore heat treatment with mechanical properties is specified in the technical delivery conditions. Even if the heat treatment is determined, different mechanical properties can be achieved. These differences are increasing in im-portance in high-strength applications like springs, cutting tools, safety, and load-bearing parts of automotive design et al. Because it has a direct impact on their lifetime. The structure consists of ferrite and cementite after spheroidization annealing...
Comparison of Mechanical and Tribological Properties of TiN and ZrN Coatings Deposited by Arc-PVD
Michal Krafka, Ladislav Lemberk, Nikolay Petkov, Lucie Svobodová, Totka Bakalova
Manufacturing Technology 2023, 23(2):194-203 | DOI: 10.21062/mft.2023.029
The continuous development of thin coatings for different applications and using various coating meth-ods require the characterization of these newly formed surfaces to evaluate their utility properties. Binary thin coatings of titanium (TiN) and zirconium (ZrN) nitrides were prepared using the Arc-PVD (Ca-thodic Arc Deposition) method. Differences were observed in the structure and morphology of the thin coatings and the change in tribological properties at room and elevated temperatures (150 °C and 300 °C). The research is focused on evaluating the frictional properties of the coating using the Ball-on-Disc method in the dry friction mode. The emphasis...
Influence of Cutting Tool and Drilling Process on the Machinability of Inconel 718
L.J. Ma, H. Yu, X.H. Mao, C.R. Li, C.Y. Feng, F.N. Li
Manufacturing Technology 2023, 23(2):204-215 | DOI: 10.21062/mft.2023.013
Nickel-based superalloy is a kind of metal material that is widely used to manufacture high-temperature parts in the fields of aviation and aerospace, but it is also a typical difficult-to-machining material. The precision cutting of nickel-based superalloy has always been an important manufacturing problem. Based on the tests of conventional drilling with three kinds of twist drills, the machinability of Inconel 718 was evaluated comprehensively by drilling force, tool wear and machining quality, and the cutting tools suitable for drilling nickel-based superalloy were chosen. Then the experiments of peck-drilling for Inconel 718 were carried out,...
Challenges in Tensile Testing of Thermoplastic Composites Reinforced with Chopped Carbon Fibre Produced by Fused Filament Fabrication Method
Jaroslav Majko, Milan Vaško, Marián Handrik, Milan Sága
Manufacturing Technology 2023, 23(2):216-224 | DOI: 10.21062/mft.2023.010
Additive manufacturing is a relatively new technology that has recently undergone noticeable develop-ment, which includes several types of technologies based on the gradual deposition of material in layers. The most widespread method is Fused Filament Fabrication, which belongs to an extrusion technique. The typical feature of extrusion methods is material deposition in the filaments form. Therefore, printer users cannot apply the same approach to products as with conventional technologies. The authors of the paper have been working with the mentioned technology for several years. The primary goal of the research is the investigation how printing parameters...
Fire Resistance Test of Geopolymer Coatings on Non-Metallic Underlying Substrates
Filip Mamoń, Martin Jaskevič, Jakub Mareš, Jan Novotný
Manufacturing Technology 2023, 23(2):225-232 | DOI: 10.21062/mft.2023.026
This article summarizes the results from the fire resistance test of geopolymer suspensions in the form of coatings on non-metallic substrates. Their heat resistance was evaluated based on the burn-through time compared to the uncoated substrate. Non-metallic substrate materials, extruded polystyrene (XPS) and chipboard (DTD) were chosen as the underlying substrates for GP suspension research. Parameters from the fire resistance test as fire test duration of geopolymer coatings and percentage increase in burn time of geopolymer coatings on an XPS and DTD substrates compared to an uncoated substrate were evaluated. One of the discussed point was also...
Geometric Accuracy of Components Manufactured by SLS Technology Regarding the Orientation of the Model during 3D Printing
Miroslav Matuš, Vladimír Bechný, Richard Joch, Mário Drbúl, Jozef Holubják, Andrej Czán, Martin Novák, Michal Šajgalík
Manufacturing Technology 2023, 23(2):233-240 | DOI: 10.21062/mft.2023.027
Selective Laser Sintering (SLS) or sintering of polymer powders is one of the most well-known additive technologies for printing 3D components. The properties of individual polymer powder materials have a significant impact on the quality of the manufactured part. Potential deformation and shrinkage can occur during printing if a significant number of parts are piled on top of one another or are oriented incorrectly, accumulating thermal energy in certain areas. The aforementioned research focuses on an experimental study to investigate the impact of the distribution and orientation of printing samples in the build chamber on the accuracy of dimensions...
Material Properties of High-strength High Chromium TWIP Steel with Increased Corrosion Resistance
Pavel Podaný, Tomáš Studecký, Aleksandra Kocijan
Manufacturing Technology 2023, 23(2):241-246 | DOI: 10.21062/mft.2023.025
Twinning induced plasticity (TWIP) steels are a class of high-strength steels that have been devel-oped for their outstanding ductility and strength properties. TWIP refers to the fact that these steels display an unusually high degree of deformation before fracture due to the formation of twins during deformation. TWIP steels could be used in a variety of industries for structural applications or com-ponents that need to withstand high levels of stress and deformation. This article deals with the de-velopment of high strength with fully austenitic microstructure and high chromium content. Micro-structure, mechanichal and corrosion properties of this...
Influence of the Mn Content on the Corrosion Behaviour of HEA CoCrFeN-iMnX (X=5, 20, 35 at.%) Prepared via MA+SPS
Filip Průša, Petr Kratochvíl, Hana Thürlová, Darya Rudomilova, Šárka Msallamová
Manufacturing Technology 2023, 23(2):247-253 | DOI: 10.21062/mft.2023.016
The high entropy alloys with intended chemical compositions of CoCrFeNiMnX (X=5, 20 and 35 at.%) were prepared by the means of mechanical alloying. Prepared powders were then compacted using the progressive spark plasma sintering, which minimizes the deleterious microstructural coarsening. The compacts were, regardless of the actual chemical composition, composed of a solid solution with FCC crystallographic lattice and a small amount of carbides identified as Cr7C3. The dimensions of those carbides increased with the content of Mn, which was confirmed also by atomic force microscopy (AFM) and scanning kelvin probe microscopy (SKPM). The surface topography...
Analysis of Cutting Forces during Machining with Additive-Produced Milling Head
Silvia Slabejová, Michal Šajgalík, Pavol Timko, Peter Kozový, Martin Novák, Miroslav Cedzo
Manufacturing Technology 2023, 23(2):254-259 | DOI: 10.21062/mft.2023.020
Today's milling cutting tools are produced in various types and shapes for a wide variety of machining processes. Development continues and offers new technological solutions. The design of replaceable milling heads offers a significant cost reduction, as only the worn-out part is replaced instead of the en-tire tool. The tough connection between the tool and the shank achieves stable performance in roughing and finishing milling. Because of the possibility of using different milling inserts, the number of neces-sary tools will also be reduced and the flexibility of using milling tools will increase. The article exam-ines the cutting forces when machining...
Smartphone-based Data Acquisition Method for Modelling 3D Printed Arm Casts
Tuong Nguyen Van, Truong Le Thanh, Trong Nguyen Van, Natasa Naprstkova
Manufacturing Technology 2023, 23(2):260-267 | DOI: 10.21062/mft.2023.019
In recent years, 3D printed arm casts can replace traditional arm casts to treat bones fractures. 3D printed arm cast modelling often uses professional 3D scanning systems to capture 3D data of the arm. These systems are very expensive and may not be available in many hospitals. In order to over-come this disadvantage, inexpensive methods should be developed. This paper introduces a new data collection method based on smartphones. The photos of an arm were taken with a smartphone cam-era using some special techniques that could facilitate the process of image processing and 3D mod-elling in Agisoft Metashape and CATIA. To validate the proposed method,...