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Current issue
Manufacturing Technology Journal, 2024 (vol. 24), issue 2
Microtexturing for Enhanced Machining: Evaluating Tool Performance in Laser-Processed Cutting Inserts
Ondrej Bilek, Jan Ondrik, Petr Janik, Tomas Kautsky
Manufacturing Technology 2024, 24(2):173-182 | DOI: 10.21062/mft.2024.038 
This article explores the significance of microtexturing on cutting tools for improved tribological performance and reduced friction in machining operations. Drawing inspiration from biomimetic structures, the study focuses on laser surface microtexturing and evaluates its impact on cutting forces and tool wear. Experiments involve microtextures of dots with a specific emphasis on a fiber laser-processed pattern. While long-term tests reveal the formation of negative protrusions on the textured tools, reduced variability in cutting forces suggests potential benefits for stable machining processes and increased tool longevity. The findings underscore...
A Unique Numerical Model to Evaluate the Influence of Adherends’ Misalignment on Adhesive Joint Strength
Andrea Corrado, Wilma Polini
Manufacturing Technology 2024, 24(2):183-191 | DOI: 10.21062/mft.2024.029
Industry 4.0 needs to have a digital representation of the real manufacturing and assembly processes to foresee the effects of modifications on equipment, tools and processes. Assembly processes often use adhesive to keep together the components because it has many advantages. The simplest example of adhesive assembly is a single lap joint. In the literature, the attention is focused on nominal adhesive assemblies, that do not represent the real products and that are tested to evaluate the product’s strength. Therefore, the obtained mechanical performances are far from those connected with the real products. The present work takes into account...
The Effect of Employing an Optimal Web Velocity Profile on Transverse Vibrations in Roll-to-Roll Manufacturing
Kadhim A. Jabbar
Manufacturing Technology 2024, 24(2):192-196 | DOI: 10.21062/mft.2024.034
The quality of web products is significantly affected by the running velocity of a process line, especially during the stages of start-up and shutting down of a web processing line. At these stages, a remarkable transverse variation (web flutter) are observed due to employing improper input velocity. Web flutter may cause some web defects such as wrinkles, poor printing and even web breakage. Therefore, employing an optimal web velocity profile is crucial to minimize web transverse vibrations during the transport of the web through different processing sections in a web process line. In this paper, an optimal velocity profile along with common velocity...
Carbide Twist Drill Spiral Groove Abrasive Flow Polishing and Abrasive Flow Analysis
Tian Ji, Lintao Lu, Boming Ren, Guihong Bian, Shengli Huang
Manufacturing Technology 2024, 24(2):197-206 | DOI: 10.21062/mft.2024.039
This paper carries out the simulation of abrasive flow for twist drill spiral grooves and the experimental study of abrasive flow polishing. The flow of abrasive in spiral groove in abrasive flow polishing twist drill was analyzed by CFD using FLUENT software. Different inlet speeds and abrasive concentrations were used as parameters for simulation calculations to obtain the state parameters of dynamic pressure and abrasive velocity in the flow channel, and to analyse their effects on the abrasive flow in the spiral groove. The analysis results show that the dynamic pressure in the twist drill spiral groove increases with the increase of inlet speed,...
Analysis of the Impact of Modernization of Machinery on the Quality of Castings Using Quality Management Tools
Krzysztof Knop, Pavol Gejdoą
Manufacturing Technology 2024, 24(2):207-218 | DOI: 10.21062/mft.2024.036
Today's manufacturing industry, especially in the context of the metals industry, is constantly evolving towards ever more advanced technologies and efficient production practices. In this context, machinery modernization is becoming a key element in improving manufacturing processes. This article focuses on analysing the impact of machinery modernization on casting quality, using selected quality manage-ment tools. The article presents an analysis of the effects of the implementation of modern technology, automatic casting machines, on the quality of castings production. Using quality tools such as the Ishi-kawa diagram, Pareto-Lorenz and the FMEA...
Research and Dynamic Analysis of a Cable Reel Device Based on Constant Tension
Hengcan Li
Manufacturing Technology 2024, 24(2):219-226 | DOI: 10.21062/mft.2024.023
A constant tension cable reel based on planetary gear transmission is introduced. The parameters of the mechanism are determined to analyze the speed and torque of the transfer mechanism. The relationship between the thread pitch and cable type show that different cable models require different parameters for the constant tension cable reel. The mechanism is designed to automatically adjust the force required for cable pulling and maintain a constant maximum tension. Then the relationship between the moment and speed of each output shaft is analyzed, and the operation mode of the cable reel was explained. The experimental results show that the proposed...
Microstructure and Mechanical Properties AlSi7Mg Alloy with Sr, Al and AlSi7Mg
Tomasz Lipiński
Manufacturing Technology 2024, 24(2):227-234 | DOI: 10.21062/mft.2024.031
Strength and malleability are important reasons for increasing applications of Al-Si alloys. Mechanical properties of Al-Si cast alloys depend not only on chemical composition but, more importantly, on microstructural features such as morphologies of dendritic α-rich in Al, eutectic β-rich in Si particles and other intermetallics that are present in the microstructure. The microstructure of an unmodified hypoeutectic AlSi7Mg alloy is responsible for the alloy's low strength parameters, and it limits the extent of practical applications. The mechanical properties of hypoeutectic silumins can be improved through chemical modification as well...
Microstructure and Properties of Natural Alloy Prepared by Aluminothermic Reduction of Deep-Sea Nodules and Processed by Rapid Solidification
Alena Michalcová, Matouą Orlíček, Pavel Novák
Manufacturing Technology 2024, 24(2):235-240 | DOI: 10.21062/mft.2024.025
This paper explores the investigation of a natural alloy processed using the rapid solidification tech-nique. The study involves the reduction of manganese nodules through aluminothermy with a 20 wt. % excess of aluminum, followed by further processing of the resulting alloy using the melt-spinning process. The obtained melt-spun ribbons were subjected to a comprehensive analysis, including X-ray diffraction, scanning electron microscopy for microstructure observation, and EDS analysis for local chemical composition. The research unveiled that the rapidly solidified ribbons consist of several key phases, including β-Mn, the Heusler phase Mn2FeSi,...
Roughness of Face-Milled Surface Topography in Directions Relative to the Feed Movement
Antal Nagy, János Kundrák
Manufacturing Technology 2024, 24(2):241-254 | DOI: 10.21062/mft.2024.024
By achieving the accuracy and roughness requirements imposed on the connecting surfaces of machine components –the topography created during machining – it is guaranteed to meet the operational requirements. We cannot ignore the fact that if connected milled plane surfaces move in different directions relative to each other during operation, there may be different contact conditions caused by the unevenness of the topography. The direction-dependent roughness irregularities and functional characteristics of the topography are not sufficiently explored, thus in this work we examine the roughness and its deviations by assuming displacements...
The Manufacturing of Environmental Barrier Coatings by HV-APS Plasma Spraying Using Er2O3 and SiO2 Powder Mixture
Paweł Pędrak, Tadeusz Kubaszek, Barbara Ko¶cielniak, Marek Góral, Mateusz Micał
Manufacturing Technology 2024, 24(2):255-264 | DOI: 10.21062/mft.2024.026
Over the last decades, nickel-based superalloys with TBC coatings have been used as the main material for hot section turbine parts. The next step in the development of engines and increasing the combustion temperature is the use of Ceramic Matrix Composites (CMC). Nevertheless, in the presence of water vapour or molten salts, accelerated degradation of substrate material. This problems can be pre-vented by additional layers or coatings produced on its surface, or combinations of layers and coatings that form Environmental Barrier Coatings (EBCs). The aim of the research was the preparation of sam-ples of a mixture of erbium oxide powders with silicon...
Analysis of Extrusion Process Parameters in PLA Filament Production for FFF Technology
Vojtech Senkerik, Martin Bednarik, Vaclav Janostik, Michaela Karhankova, Ales Mizera
Manufacturing Technology 2024, 24(2):265-271 | DOI: 10.21062/mft.2024.037
Additive technologies are becoming a common part of not only prototype production, but also piece or small series production. However, the choice of technology and material plays a key role in the applicability of the manufactured parts. The most widespread type of additive technology is FFF technology, which consists of applying a fused plastic string in single layers. The resulting mechanical properties of parts produced using this technology depend not only on the material and structure selected, but also on the process parameters used in the printing process itself. This study deals with the production of filament from PLA, which is the primary...
The Effect of TiO2 Layers on the Surface Properties of Materials
Jana ©ulcová, Iveta Papučová, Jana Pagáčová, Andrej Dubec, Andrea Feriancová, Maroą Dedinský, Peter Sukeµ
Manufacturing Technology 2024, 24(2):272-278 | DOI: 10.21062/mft.2024.022
One of the ways to improve or change the surface properties of materials is to apply thin layers. TiO2-based layers are used to protect surfaces against wear or atmospheric and thermal effects (anti-corrosion, anti-abrasive and anti-static layers). They are also used in optical coatings, on windows or glasses (anti-reflective, self-cleaning and conductive transparent layers), in healthcare and in households to ensure the cleanliness of surfaces. The work deals with the effect of TiO2 layers on the surface properties of selected substrates. The layers were prepared by the sol-gel method using the dip-coating technique on glass and stainless steel. The...
Optimization of Process Parameters for a Vertical Shaft Impact Crusher through the CFD-DEM Method
Ke Sun, Limei Zhao, Qitao Long
Manufacturing Technology 2024, 24(2):279-288 | DOI: 10.21062/mft.2024.028
In this study, the process parameters of a vertical shaft impact (VSI) crusher are optimized. Different feed size distributions, material physical properties, and product size distribution requirements are considered to determine the optimal material particle bond cleavage ratio. First, a numerical model is developed to simulate the crushing effect by adopting a CFD-DEM method. Then, the relationship between the crushing effect and the rotor speed, feed size distribution, and feed rate is revealed by analyzing the bond cleavage ratio of smaller-size distribution feed crushing to the specified particle size. The optimized working parameters of the crusher...
The Effect of Strain Rate on the Friction Coefficient
Petr Svoboda, Miroslav Jopek
Manufacturing Technology 2024, 24(2):289-293 | DOI: 10.21062/mft.2024.027
The Male and Cockroft ring compression test is one of the methods used to determine the coefficient of friction in forming. This method can be used to determine the coefficient of friction without the need to measure the force. This paper describes the results of the Male and Cockroft ring compres-sion test for the Hardox 450 material at different strain rates. The experiment was performed on ZD40 hydraulic press and CFA-80 pneumatic die hammer at the Faculty of Mechanical Engineering of Brno University of Technology. The test results were recorded in a calibration diagram. The results show that the strain rate has a significant effect on the coefficient...
Tribological Properties of 3D Printed Materials in Total Knee Endoprosthesis
Matus Varhanik, Josef Sedlak, Zbynek Studeny, Patricia Janigova, Felicita Chromjakova
Manufacturing Technology 2024, 24(2):294-306 | DOI: 10.21062/mft.2024.032
The submitted paper deals with biotribological contact in total knee arthroplasty. The goal was to evaluate the influence of the metal component production technology on tribological parameters in defined environments. The reference sample was a standard available test ball made of the subject material, used in testing tribological properties by the "Ball on Pin" method. The preparation of the experiment consisted in the production of test disks from UHMWPE material and the production of a metal test component with a spherical surface. The condition of the experiment and the basis of this contribution is to compare the properties of conventionally...
Research on Linkage Accuracy of "Baby Hanging Basket" Five-axis Precision Machine Tool
Yuanyuan Wu, Huiling An, Bo Li, Hua Zhang, Lai Hu
Manufacturing Technology 2024, 24(2):307-314 | DOI: 10.21062/mft.2024.033
The "baby hanging basket" five-axis precision machine tool (BHBFPMT) studied in this study is mainly used to process open impeller and closed impeller in aerospace field. However, the linkage accuracy (LA) measurement of five-axis machine tool is one of the important detection means to ensure the tolerance requirements of precision parts. The mathematical model of linkage accuracy (LA) of "baby hanging basket" five-axis precision machine tool (BHBFPMT) was established. The accuracy of X, Y, Z, B and C axes was measured, respectively. Combined with the measurement results, a pulse compensation method was proposed to compensate the accuracy. The linkage...
Design Method of Cam Five-bar Paper Picking Mechanism of Packaging Machine Based on Position and Orientation Constraints
Ming-rui Xue, Jun Ye, Hong-qian Hu
Manufacturing Technology 2024, 24(2):315-323 | DOI: 10.21062/mft.2024.030
The work aims to present a design method of cam five-bar paper taking mechanism of packaging machine based on position and orientation constraints to better meet the position and orientation requirements of the end paper taking actuator in the high-speed paper picking process. At the first stage, according to the given ideal position and orientation requirements of the end paper taking actuator, the mathematical model of the five-bar mechanism satisfying the position and angle constraints is established by using the kinematic mapping theory, and two cams are used to constrain the two freedom of the five-bar mechanism to obtain the cam five-bar paper...
Research on Piston Avoidance Valve Pit Milling Method
Changlong Zhao, Hongnan Ma, Qinxiang Zhao, Xiaoyu Jia, Haifeng Zhang
Manufacturing Technology 2024, 24(2):324-331 | DOI: 10.21062/mft.2024.035
In order to improve the processing efficiency and surface quality of the piston avoidance pit, reduce labor costs, and make the processing of the piston avoidance pit meet the modern production re-quirements, it is realistic and feasible to combine Pro/E and Mastercam software to complete the processing of the piston avoidance pit. Two different kinds of piston pits are selected for machining, and the 3D model of the piston pits is established by Pro/E software, and the process preparation and parameter setting are realized by Mastercam software, and the NC machining simulation is con-verted into NC code to realize the machining of the piston pits;...