Manufacturing Technology Journal - Latest articles
Results 241 to 264 of 264:
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...
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,...
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...
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...
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...
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...
Topology Optimization of Gripping Jaws of Industrial Robot
Miroslav Cedzo, Richard Joch, Pavol Timko, Jozef Holubják, Tatiana Czánová, Michal Šajgalík
Manufacturing Technology 2023, 23(1):25-31 | DOI: 10.21062/mft.2023.009
There is a lot of applications for manipulating industrial robots nowadays. Maximizing the tasks that can be assigned to robot manipulators is one of the criteria for deciding if their application is appropri-ate. The article discusses the topology optimization of the gripping jaws of an industrial robot to reduce the jaws' weight. The previously used gripping element made of C50E steel was optimized to reduce the weight of the jaws. Shape optimization was performed based on analysis from CAD programs Inventor Professional 2022, Autodesk Fusion 360, and Ansys Discovery. The new jaws were manufactured by the additive technology of selective laser sintering...
Surface Analysis and Digitization of Components Manufactured by SLM and ADAM Additive Technologies
Pavol Timko, Jozef Holubjak, Vladimír Bechný, Martin Novák, Andrej Czán, Tatiana Czánová
Manufacturing Technology 2023, 23(1):127-134 | DOI: 10.21062/mft.2023.008
The presented article focuses on the surface analysis of the components manufactured by different additive technologies and their reverse digitization. Sintered components were manufactured by SLM and ADAM technologies, while their surface was analyzed using a progressive optical measurement method. To examine the possibility of reverse engineering, the components were optically scanned with a laser scanner and compared to their CAD model. Based on empirical experience, to scan opti-cally the metal and lustrous surfaces is a challenge. The components were manufactured from anti-corrosion materials 17-4 PH and 316L–0407.
Adhesion of Various Geopolymers Coatings on Metal Substrates
Jakub Mares, Filip Mamon, Martin Jaskevic, Jan Novotny
Manufacturing Technology 2023, 23(1):81-87 | DOI: 10.21062/mft.2023.024
This article deals with adhesion of various alkali-activated metakaolin-based geopolymer coatings on structural steel 1.0038 (according to EN 10025-2). This steel alloy was chosen in order to analysis ad-hesion of prepared geopolymer coatings. Our samples were characterized by laser and SEM micros-copy and grid test was performed. Microscopy was performed to get knowledge about visible charac-terization and overall quality of prepared coatings. Based on previous research SEM results corre-spond with properties changes in coatings and their classification of grid test. Grid test was per-formed and results was evaluated. These results show potential...
Measuring the Quality of Driving Characteristics of a Passenger Car with Passive Shock Absorbers
Martin Svoboda, Milan Chalupa, Vít Černohlávek, Adam Švásta, Artur Meller, Václav Schmid
Manufacturing Technology 2023, 23(1):118-126 | DOI: 10.21062/mft.2023.023
The article deals with the quality of the driving characteristics of a passenger car with passive shock absorbers depending on the tire pressure. The work was solved using experimental methods using the AHS test bench. The main goal of the work was to assess the vehicle suspension system using acceleration sensors and pressures between the wheel and the road using shock absorber test benches using the EUSAMA and CAP methodology. The results of the work demonstrated the possibilities of using the measurement of acceleration values in selected places in the vehicle. The obtained results were also verified for the possibilities of further development...
Surface Roughness, Topography, Accuracy, Chip Formation Analysis & Investigation of M390 and M398 Steels after Hard Machining
Jozef Majerík, Juraj Majerský, Igor Barényi, Henrieta Chochlíková, Jana Escherová, Mária Kubasáková
Manufacturing Technology 2023, 23(1):60-72 | DOI: 10.21062/mft.2023.015
Article deals with processing of intermetallic materials produced by powder metallurgy M390 and M398 Microclean® produced by Böhler. Main interest is the analysis & measurement of their surface rough-ness and topography after the processing by DNMG and WNMG geometry of cutting inserts with 0.4 and 0.8 mm radius after hard turning at the same process parameters for both materials and all types of cutting inserts. The comparative studies were carried out for the microgeometrical and chip formation research on the machined surfaces and the technological processes were assessed, including chip dia-grams. Spectral analysis was used to verify the...
Computer Simulation of Heating Cycle of Aluminum Alloys Using Friction Stir Welding Technology
Petra Kvasnová, Daniel Novák, Viktor Novák, Milan Ďuriš
Manufacturing Technology 2023, 23(1):47-52 | DOI: 10.21062/mft.2023.014
The paper deals with welding of aluminum alloys using Friction Stir Welding technology. This repre-sents one of the solid-state welding technologies in which the base materials are not melted. This pro-vides new possibilities for the use of special and hybrid manufacturing technologies. The article presents the current progress in the Friction Stir Welding technology, a microstructure analysis of a weld joint created by the FSW method and a heat-deformation computer simulation of an aluminium alloy speci-men in the program Ansys.
Effect of Refined Spheroidizated Structure on Mechanical Properties of Spring Steel 51CrV4
Jakub Kotous, Daniela Nacházelová, Jaromír Dlouhý, Martin Rund
Manufacturing Technology 2023, 23(1):40-46 | DOI: 10.21062/mft.2023.012
The steel 51CrV4 is widely used for production of springs. Materials research into spring steels aims to meet the requirements of industry, which mainly concern high yield and tensile strengths. Ductility has to be retained as the strength is increased. Also, the resistance against brittle fracture is im-portant, measured as fracture toughness. Enhancement of the mentioned mechanical properties can be accomplished by structural refinement. One possible way to refine the final quenched and tem-pered structure is to refine the soft annealed structure before quenching. The article is devoted to the Accelerated Carbide Spheroidisation and Refinement (ASR)...
Evaluation of Riveting Force Influence on the Quality of Riveted Joint of Aluminium Alloy EN AW - 6016
Josef Bradáč, Jiří Sobotka
Manufacturing Technology 2023, 23(1):2-10 | DOI: 10.21062/mft.2023.011
Joining technologies are very important aspects of production process in the automotive. Especially regarding the use of newly developed types of materials (e.g. ultra high-strength steels or aluminium alloys), in addition to welding technology, e.g. riveting or adhesive bonding technologies are used. Submitted article evaluates the effect of the riveting force on the final quality of riveted joint when joining aluminium alloy EN AW-6016 (thickness 2 mm). The actual evaluation of the riveted joint was carried out using a shear test, measuring the hardness HV01 and deformation analysis of specimen using non-contact optical scanning (ATOS III Triple...
Research of Robots in Cooperative Mode in Human Body Part Detection
Josef Ponikelský, Vít Černohlávek, Jan Štěrba, Pavel Houška
Manufacturing Technology 2023, 23(1):99-109 | DOI: 10.21062/mft.2023.007
The aim of this article is to approach the measurement of forces and pressures of collaborative robots. In the article, research will be carried out on measuring the forces and pressures of a collaborative robot before putting it into real application. Force and pressure values will be measured using appropriate measuring devices. The measured results will be compared with the ISO/TS 15066:2016 technical specifi-cation and subsequently evaluated.
Influence of Using Cutting Fluid under the Effect of Static Magnetic Field on Chip Formation in Metal Cutting with HSS Tools (turning operation)
Umidjon Mardonov, Saidamin Khasanov, Andrey Jeltukhin, Shakhrizoda Ozodova
Manufacturing Technology 2023, 23(1):73-80 | DOI: 10.21062/mft.2023.006
This paper presents a new method of improving the material removal process in metal cutting. Chip formation plays an important factor in the metal cutting process and increasing its condition has a great impact on cutting machine details. Based on lubricating cooling conditions in the metal cutting process, a novel methodology is proposed to decrease the deformation that emerged in the material removal process while cutting cylindrical details in lathes. Application of stating magnetic field on flowing cutting fluids decreased the shrinkage of the chip in turning operation. Analytical and practical experiments show that the effect of cutting fluid...
Topology Optimization of Static Turbomachinery Components
Francesco Buonamici, Enrico Meli, Nicola Secciani, Alessandro Ridolfi, Andrea Rindi, Rocco Furferi
Manufacturing Technology 2023, 23(1):11-24 | DOI: 10.21062/mft.2023.005
Additive Manufacturing has enabled the design of complex components in several technical fields. Considering turbomachinery components, additive manufacturing has unlocked the achievement of significant performances for dynamic rotoring components. The application of topology optimization methods is one of the main factors accelerating the technological development of this sector. This paper presents a procedure for the optimization of static turbomachinery components. The frame-work proposed compares the results obtained by introducing a lattice structure and a solid optimized shape. The procedure is presented with reference to a specific case study....
Economical and Statistical Optimization of the Maintenance in the Production Process
Eliška Cézová
Manufacturing Technology 2023, 23(1):32-39 | DOI: 10.21062/mft.2023.004
The article presents a comprehensive example that demonstrates the control of a plastic injection process in practice. It includes measurement and analysis of the production process, its control using a control diagram to bring the production process to a state under statistical control by applying tests of non-random clusters and subsequent evaluation of process capability. The last part of the article gives an example of the maintenance of economical statistical optimization for four scenarios.
Evaluation of Selected Technological Parameters for Selective Laser Melting of AlSi10Mg Metal Powder
Jozef Šutka, Denisa Medvecká, Radoslav Koňar, Marek Bruna, Marek Matejka
Manufacturing Technology 2023, 23(1):110-117 | DOI: 10.21062/mft.2023.003
Reusing the powder across consecutive route cycles is typical in a Selective Laser Melting (SLM) process since it is more sustainable and cost-effective. The theoretical part of the paper is oriented on the explanation of the SLM method principle, construction, and parameters of the device Renishaw AM250 used for manufacturing samples made of AlSi10Mg aluminium alloy. The experimental part focuses on evaluating powders that had been used in the process for a long time with periodic ‘rejuvenation’. The main aim will be to monitor whether the samples will be affected and if they achieved the required quality of mechanical properties and compare...
Studies on a Robotised Process for Forging Steel Synchronizer Rings in the Context of Forging Tool Life
Artur Meller, Marcin Suszyński, Stanisław Legutko, Marek Trączyński, Vit Cernohlavek
Manufacturing Technology 2023, 23(1):88-98 | DOI: 10.21062/mft.2023.002
This paper proposes a solution not previously used in the forging industry, which aims to reduce the proportion of arduous human labour. The concept of a prototype robotic station for hot forging includes a system that allows the selection of batch material with its heating, the execution of the process of lu-brication of forging tools and the forging itself, synchronised with the feeding and removal of material using full automation, in accordance with the idea of Industry 4.0. At the same time, by increasing the repeatability of the entire forging process and changing some of its key parameters, it will be possible to influence the durability of...
Influence of Impurity Morphology on the Fatigue Strength of High-Purity Structural Steel Melted in an Electric Furnace
Tomasz Lipiński
Manufacturing Technology 2023, 23(1):53-59 | DOI: 10.21062/mft.2023.001
A modern user requires low operating costs, but also reliability from machines and technical devices. Reliability during the service life depends on the quality of construction solutions, but also largely on the quality, properties and adaptation to the working conditions used in the construction of construction materials. During the operation of technical objects, their a highly predictable wear occurs. The problem is the phenomena of premature wear and damage of elements. The causes of failure of technical facilities are usually complex and depend on many factors. They can include the human factor and the one related to the quality, selection, production...