Manufacturing Technology Journal, 2024 (vol. 24), issue 6
Studies of Nanoscratching in the Aspect of Homogeneity of Adhesive Joints
Kamil Anasiewicz
Manufacturing Technology 2024, 24(6):856-864 | DOI: 10.21062/mft.2024.102 
This paper presents the results of nanoscratch tests conducted on adhesive bond thickness, analyzed in terms of material property heterogeneity within adhesive bonds. Nanoscratch tests were performed on adhesive layers made from rigid and elastic adhesives with thicknesses of 0.05 mm and 0.1 mm, under constant load conditions. Penetration depth and residual depth results were analyzed for potential varia-tions in hardness along the adhesive layer thickness. The findings clearly indicate some differences in the material properties of adhesive layers within bonded joints. These results can also be correlated with the phenomenon of apparent Young's modulus,...
Analysis of the Torsional Strength of Selected Photopolymers Additively Manufactured Using Polyjet Technology
Jacek Bernaczek, Mariusz Dębski, Małgorzata Gontarz-Kulisiewicz
Manufacturing Technology 2024, 24(6):865-870 | DOI: 10.21062/mft.2024.094
PolyJet technology, based on the printing and photopolymerization of model material, is currently, along with stereolithography or 3SP (Scan, Spin and Selectively Photocure), the most commonly used rapid prototyping method based on optically active resin. The article presents the results of torsional strength tests of samples made of optically active resins VeroDentPlus-MED690, VeroClear-RGD810, and Rigur-RGD450 by Stratasys in PolyJet technology. The samples were prepared in HQ (High Quality) mode with a layer height 0.016 [mm]. The tests included a static torsion test using a specialized research stand by the Department of Mechanical Engineering...
Structural Design of a Rotary Valve Manipulator of Bulk Materials – Strength Design of Connecting Elements of the Frame and Trolley
Miroslav Blatnický, Ján Dižo, Alyona Lovska, Vadym Ishchuk
Manufacturing Technology 2024, 24(6):871-878 | DOI: 10.21062/mft.2024.096
The paper is a further step in ongoing research on the incorporation of the proposed bulk material rotary valve assembly into an existing production line serving the food industry in bagging milk powder. The main objective of the present paper is the strength static analysis of the previously presented structural design of the trolley and attachment of the frame structure as a track for the travel. Moreover, analytical engineering calculations whose results provide boundary conditions for the numerical strength design of the assembly of the rotary valve for transporting of bulk materials are included in the paper. The pro-posed mechanism allows precise...
Advanced Manufacturing Techniques for Lightweight Muon Spectrometer Support Structures in the FCC Project
Jan Brajer, Martin Dub, František Lopot, Pavel Malý
Manufacturing Technology 2024, 24(6):879-885 | DOI: 10.21062/mft.2024.101
With the rising demand for efficient, lightweight support structures in high-energy physics experiments, advanced manufacturing techniques and material optimization are key to achieving high-performance designs. This study focuses on the application of generative design and topological optimization in the development of support structures for the FCC muon spectrometer. By leveraging these methods, we maximized material efficiency and minimized weight while ensuring structural integrity and meeting strict design constraints, including non-magnetic properties, minimal deformation, and high precision. A detailed evaluation was conducted with respect to...
Nonlinear Stochastic Dynamics Analysis of Vehicle Bodies Based on the Direct Probability Density Integral Method
Qiangqiang Chen, Jilei Zhou, Chunkai Mu
Manufacturing Technology 2024, 24(6):886-900 | DOI: 10.21062/mft.2024.104
Manufacturing inaccuracies in vehicle suspension systems inevitably lead to uncertainties in the parameters of their structural components. Simultaneously, the road excitation impacting nonlinear vehicle systems exhibits pronounced randomness and time-variant characteristics. Consequently, it is crucial to conduct a stochastic dynamics analysis on nonlinear suspension systems, taking into account these uncertain factors. In this paper, a seven-degree-of-freedom (7-DOF) nonlinear suspension system dynamics model has been established. The stochastic process of road irregularities is simulated using the harmonic superposition method. Moreover, based on...
Investigation of the Tool Wear Progression in Parting Technology
Martin Drbal, Stepan Kolomy, Josef Sedlak, Jan Zouhar, Jiri Vitek
Manufacturing Technology 2024, 24(6):901-913 | DOI: 10.21062/mft.2024.093
Parting-off stands as a fundamental method of turning, involving the cutting of the workpiece. The tool is most frequently a replaceable insert secured in a clamping bed. A pivotal set of observable metrics that ascertain the efficacy of a tool and its appropriateness for machining a specific material under defined cutting conditions is its durability. These durability parameters need to be determined for all new tools to ensure optimal performance and application in various machining scenarios. The primary objective of this research was analysis of the wear experienced by replaceable cutting inserts within the realm of parting technology. There were...
Effect of Heat Treatment and Corrosion Load on the Microstructure of the Ti6Al4V Alloy
Roman Horký, Sylvia Kuśmierczak, Nataša Náprstková, Iryna Kambarová
Manufacturing Technology 2024, 24(6):914-928 | DOI: 10.21062/mft.2024.097
Titanium and its alloys are an important structural material in all sectors of industry. Thanks to its mechanical properties. One of the most widely used titanium alloys is the Ti6Al4V alloy. If we heat alloys for a long time in an air atmosphere, TiO2 is formed on the surface of the parts. The Ti6Al4V alloy, also referred to as Ti64, is a two-phase alloy formed by α+β solid solutions from the point of view of microstructure, it is characterized by corrosion resistance and good biocompatibility. Through heat treatment, we can improve the mechanical properties of the alloy, improve the fracture toughness, influence and reduce the internal...
Enhancing Durability of Multi-Cavity Forging Tools through Process Automation
Artur Meller, Stanisław Legutko, Adrian Mróz, Mariusz Piechowski, Hubert Kędziora, Vit Cernohlavek
Manufacturing Technology 2024, 24(6):929-939 | DOI: 10.21062/mft.2024.105
The article highlights the promising potential of automating the forging process to enhance the durability of multi-cavity forging tools. Entrepreneurs aim to boost production efficiency by increasing output per unit of time and reducing the degradation of forging dies and punches. The high costs associated with specialized materials and complex manufacturing processes for these tools elevate the final product price. Automation offers a viable alternative, ensuring consistent process parameters and reducing the physical strain on workers. This consistency leads to extended tool durability, even without the use of special manufacturing techniques for...
Technological Considerations in WEDM of Carbon Fiber Reinforced Silicon Carbide Composites (Cf-SiC)
Dariusz Poroś, Hubert Skowronek
Manufacturing Technology 2024, 24(6):940-951 | DOI: 10.21062/mft.2024.103
Wire electrical discharge machining (WEDM) was employed to process thin-walled, multidirectional carbon fiber-reinforced silicon carbide (Cf-SiC) composites. This study investigates the effects of key WEDM parameters, including gap voltage (Vg), pulse on-time (Ton), pulse off-time (Toff), and wire electrode type on material removal rate (MRR) and surface roughness (SR). All experimental planning, data analysis, optimization, and result visualization were conducted using MATLAB software. Results indicate that using CuZn50-coated wire electrodes increases MRR by 11% compared to CuZn37 bare brass wire. Scanning electron microscopy (SEM) confirmed the...
Reconstruction of 3D Models of Fishing Boat Propellers Using Photogrammetry and Reverse Engineering Techniques
Tuong Nguyen Van, Natasa Naprstkova
Manufacturing Technology 2024, 24(6):952-959 | DOI: 10.21062/mft.2024.091
The conventional method for measuring propeller geometric parameters involves utilizing specialized equipment or 3D measuring devices. Currently, specific propeller geometry parameters can be as-sessed by employing virtual measurements performed on a virtual propeller model generated using reverse engineering methods. This paper introduces a novel approach to constructing 3D models of small fishing boat propellers using photogrammetry and reverse engineering techniques. In this method, the propeller is captured through photographs taken with a smartphone camera employing special techniques. Subsequently, these images are processed using Agisoft Metashape...
Statistical Analysis and Machine Learning-based Modelling of Kerf width in CO2 Laser Cutting of PMMA
Ema Vasileska, Ognen Tuteski, Boban Kusigerski, Aleksandar Argilovski, Mite Tomov, Valentina Gecevska
Manufacturing Technology 2024, 24(6):960-968 | DOI: 10.21062/mft.2024.095
Recently, engineering polymers like PMMA have increasingly replaced traditional materials in industry where feasible, with CO2 laser cutting gaining attention for its high quality and speed in processing these materials. Achieving precise cuts is crucial for product accuracy, with kerf width serving as a key quality attribute to ensure quality and functionality of the final product. This study focuses on the im-pact of three critical process variables: stand-off distance, laser power, and cutting speed, on the kerf width in CO2 laser cutting of PMMA. Through a full-factorial experiment, the process parameters are systematically varied to understand...
The Influence of the Crane Track Unevenness on the Load of the Supporting Crane Structure
Ján Vavro, Ján Vavro jr., Ľuboš Marček, Jana Kuricová, Miloš Taraba, Lukáš Klimek, Pavol Čerňava
Manufacturing Technology 2024, 24(6):969-976 | DOI: 10.21062/mft.2024.098
The paper presents the analysis of the gantry crane loading when driving along the crane track, using a 3D model, for which the analysis of the gantry crane frame loading was performed. The gantry crane is designed to remove dirt that is in front of the turbine under the water surface. For the gantry crane which moves along a track, the directional and vertical unevennesses were determined by experiment and are given in graphic and numerical form in (mm), relating to A track and B track with a total track length of 450 (m). Based on the knowledge of the unevenness of the rail track, the four random functional dependencies defining the irregularities...
Influence of Aluminium Waste Chips Content from the Machining Technology in the Batch on the Final Properties of the AlSi7Mg0.3 Alloy Casts
Tomáš Vlach, Jaromír Cais, Roman Horký
Manufacturing Technology 2024, 24(6):977-984 | DOI: 10.21062/mft.2024.092
The aim of the research was to assess the influence of additions of different proportions of alumini-um waste chips from the machining technology on the melt quality and final properties of AlSi7Mg0.3 alloy casts. All casts were created using by gravity casting technology into preheated metal mold. The first cast was a pure AlSi7Mg0.3 alloy, followed by other samples with contents of 10, 30, 50, 70 wt.% of aluminum waste chips in the batches. All the samples were subjected to the Brinnel hardness and Vickers microhardness of solid solution of α(Al). Also, Density index was measured. At the end of research, the microstructures of the samples were...
Structure Evolution of Multi-Alloyed Iron Aluminides during Two-Step Annealing
Vera Vodickova, Pavel Hanus, Petra Pazourkova Prokopcakova, Martin Svec
Manufacturing Technology 2024, 24(6):985-991 | DOI: 10.21062/mft.2024.099
The microstructure of single-phase (as-cast) and two-phase (after heat treatment processes) Fe3Al-based alloys doped with silicon, molybdenum, and vanadium/tungsten have been studied. The grain size and phase composition have been determined. The evolution of the secondary phase amount, morphology, and distribution during the heat treatment process has been investigated. Both alloys were heat treated at 1200°C/2 h and, subsequently, at 900 °C. For both alloys, the secondary phase formation started after heat treatment at 900°C /4h, and their amount depended on the annealing time. Vanadium atoms remain in the solid solution, while tungsten atoms partially...
Analysis of the Influencing Factors on the Oil Film Uniformity of Hydro-viscous Drive Clutch
Xiangping Liao, Langxin Sun, Shaopeng Kang, Kailei Liu, Xinyang Zhu, Ying Zhao
Manufacturing Technology 2024, 24(6):992-1000 | DOI: 10.21062/mft.2024.100
Hydro-viscous drive (HVD) clutch is a type of power transmission device by using shear stress of oil film. Whether the oil film between friction pair are uniformly distributed is the key factor that affecting the perfor-mance of HVD clutch. However, it is hard to make sure that the uniformity of oil film between friction pair are the same, which can lead to uneven wear problem for the frictional plates of HVD clutch. In order to study the uniformity of oil film of HVD clutch, the distribution regularity of oil films between friction pair of HVD clutch is researched by establishing the mathematics model. and a new HVD clutch with double-piston structure...