Manufacturing Technology Journal, 2025 (vol. 25), issue 1
Creating a 3D Model of a Hovercraft for Research into Structural Shape Optimization and Material Design of Structural Parts
Milan Chalupa, Adam Švásta, Zdeněk Krobot, Josef Veverka, Roman Knobloch, Antonín Svoboda, Martin Svoboda, Patrik Balcar, Jaroslav Cais, Jan Štěrba, Michal Lattner, Josef Ponikelský
Manufacturing Technology 2025, 25(1):2-13 | DOI: 10.21062/mft.2025.007 
The article describes the creation of a mathematical 3D model of the original hovercraft structure, which will be further used for research into modifying the shapes and materials of the structure to ensure better driving conditions. Proposals for new materials for individual parts of the hovercraft structure will be addressed in order to reduce the weight of the hovercraft and thereby ensure a higher possible speed of movement, reduce fuel consumption and ensure the necessary mechanical properties of individual segments. The mathematical model of the simplified hovercraft model was created in the Cradle and Adams simulation programs. The paper is...
Predictive Modelling of Surface Roughness in Grinding Operations Using Machine Learning Techniques
Maya M. Charde, Trupti P. Najan, Lenka Cepova, Ajinkya D. Jadhav, Namdeo S. Rash-inkard, S. P. Samal
Manufacturing Technology 2025, 25(1):14-23 | DOI: 10.21062/mft.2025.006
This paper details a systematic machine learning workflow designed for the prediction of surface roughness in grinding operations using key machining parameters. Those parameters are: Depth of Cut, Feed Rate, Work Speed, and Wheel Speed. The model was trained and validated on a data set which comprised experimental measurements of those parameters and their corresponding values of surface roughness. Three machine learning models, Random Forest, Gradient Boosting, and LightGBM, were developed and tested based on accuracy of prediction of the surface roughness. The validation of all three models was performed using performance metrics like Mean Squared...
Assessment of the Possibility of Using the Continuous Wavelet Transform and Fourier Transform to Analyse Geometric Structures Obtained on the Surface of Turned High-Molecular Polymers
Paweł Karolczak, Maciej Kowalski
Manufacturing Technology 2025, 25(1):24-36 | DOI: 10.21062/mft.2025.008
The article presents the possibilities of using wavelet transform and fast Fourier analysis (FFT) to evaluate the signal collected during roughness measurement. During the tests, high-density polyeth-ylene was turned using variable cutting parameters. During cutting, the tool feed was changed to ob-tain roughness structures of different types and with varying degrees of anisotropy. The measured roughness profiles were filtered with Daubechies 6 (db6), Morlet and "Mexican Hat" wavelets and examined using Fourier analysis. The research carried out shows how the machining conditions affect the surface condition and the stability of the cutting process...
Effect of DCSBD Plasma Treatment on the Mechanical Properties of Polymer Films
Marcel Kohutiar, Michal Krbata, Róbert Janík, Jozef Jaroslav Fekiač, Lucia Kakošová, Jana Escherová
Manufacturing Technology 2025, 25(1):37-44 | DOI: 10.21062/mft.2025.012
Polymers and their surface modifications are the subject of intensive research due to their wide industrial applications in the fields of food packaging, biomedicine and electronics. The most widely used polymer films include polyethylene (PE), polyethylene terephthalate (PET) and polypropylene (PP), whose surface and mechanical properties can be optimized through physicochemical modifications. Diffuse coplanar surface barrier discharge (DCSBD) represents an effective method for modifying the surface properties of polymers without significantly affecting their structural properties. This study focuses on analyzing the effect of DCSBD plasma discharge...
Comparison of Optical Scanners for Reverse Engineering Applications on Glossy Freeform Artifact Pharaoh
Michal Koptis, Jiri Resl, Jan Urban, Jan Simota, Jiri Kyncl, Petr Mikes, Libor Beranek
Manufacturing Technology 2025, 25(1):45-56 | DOI: 10.21062/mft.2025.015
Article deals with analysis on influence of post-process settings profiles in the Polyworks software and its influence on measuring bias (difference between average surface profile deviation and artifact reference value) and standard deviation of measured data. The comparison was evaluated on glossy artifacts with freeform surfaces. Setting with least bias and standard deviation was than used to evaluate repeatability and systematic measurement error and minimum tolerance bandwidth Tmin according to VDA 5 and MSA 4, respectively for three conceptions of laser scanning technologies available on today’s market. Cartesian CMM LK Altera S with laser...
Enhancement of Epoxy Composites with Benzoylated Fibres of Demostachya bipinnata (Darbha): Impact on Mechanical Properties
G. Sai Krishnan, M. Vanitha, Robert Čep, Achille Désiré Betené Omgba, G. Shanmugasundar, P. Selvaraju, K. Logesh
Manufacturing Technology 2025, 25(1):57-66 | DOI: 10.21062/mft.2025.002
Benzoylation treatment represents a promising strategy to enhance adhesion between plant fibres and polymer matrices. This study aims to improve the properties of epoxy composites using benzoylated fibres of Demostachya bipinnata (Darbha). The analysis focuses on the impact of chemical treatment on the physicochemical and mechanical characteristics of the fibres and resulting composites. After retting and alkaline pre-treatment of the fibres, benzoylation using 10 wt% concentrated benzyl chloride is applied to introduce benzene groups, thereby enhancing the density and chemical stability of the fibres. Results highlight increased density (1869 kg.m-3)...
Optimized for Silicon Wafer Dicing Blade Machining and Grinding Parameters of Structure
Dongya Li, Wangchao Jiang, Henan Qi
Manufacturing Technology 2025, 25(1):67-75 | DOI: 10.21062/mft.2025.009
When diamond scribing knives are used to grind silicon wafers at ultra-high speeds, slight changes in the structure of the diamond scribing knives and changes in the grinding parameters will have a large impact on the processing accuracy and appearance of the silicon wafers. In order to reduce the defective rate of silicon wafers, improve the service life of diamond scribing knives and grinding efficiency. To address this issue, the working mechanism of the scribing knife grinding is analysed in the paper, the influence of spindle speed and feed rate on the quality of the silicon wafer slit when the scribing knife is grinding is studied, and the chipping...
Investigation of the Wear Progression of Nozzle in Abrasive Waterjet Machining with Different Abrasive Material
Nuraini Lusi, Mebrahitom Gebremariam, Abdur-Rasheed Alao, Kushendarsyah Saptaji, Azmir Azhari
Manufacturing Technology 2025, 25(1):76-85 | DOI: 10.21062/mft.2025.011
Determining the productivity and quality of precision AWJ machining requires routine and careful inspection of nozzle condition. The degradation of the inner bore of the nozzle adversely impacts the mixing efficiency and uniformity of the water jet, thereby affecting its cutting performance. In this study, new nozzle was designed and manufactured using additive manufacturing and were made of 316 L stainless steel. The new nozzle consists of two combined parts with the peculiarity of being easy to install using a screw thread. The wear behavior of the new nozzle was examined using an accelerat-ed wear test. An accelerated wear test was conducted on...
Microscopic analysis of selected materials used for hot water heating using SEM
Ľuboš Marček, Ján Vavro, jr., Jan Vavro
Manufacturing Technology 2025, 25(1):86-94 | DOI: 10.21062/mft.2025.003
The introduced work deals with the microscopic analysis of metallographically prepared selected metal materials structures, using a scanning electron microscope (SEM). Prepared samples of seamless steel pipes were subjected to a thorough microscopic examination from the outer surface to the inner regions in order to interpret the spe-cific structure, including the change of the inner surfaces due to wear. The experiment showed that the micro-structure and character of the surfaces play a crucial role in the behavior of metallic materials under real condi-tions. Four types of pipes were monitored according to their use. The unused steel pipe (designated...
Optimization of Zero-Point Setting for Enhanced Measurement Accuracy
Miroslav Matuš, Mário Drbúl, Jaromír Markovič, Michal Šajgalík, Andrej Czán, Miroslav Cedzo, Richard Joch, Martin Novák, Jana Petru
Manufacturing Technology 2025, 25(1):95-102 | DOI: 10.21062/mft.2025.014
The precise setting of the zero point represents a critical factor in non-contact measurement of mechani-cal components, particularly in areas such as the engineering and automotive industries, where high accuracy is key to quality control. This study analyzes the impact of various alignment methods—specifically the best-fit method and the datum method (3–2–1)—on the measurement results of complex geometric shapes. Experimental measurements were conducted using a laser scanner and Polyworks 2015 software. The results indicate that the best-fit method achieves higher accuracy when measuring complex and freely oriented shapes,...
Optimization of Titanium Surface for Live Cells
Maxim Puchnin, Františka Pešlová, Jiří Kuchař
Manufacturing Technology 2025, 25(1):103-112 | DOI: 10.21062/mft.2025.010
The present paper is focused on the study of the characteristics of selected titanium alloys before and after heat treatment. The specimens were cooled both in water and liquid nitrogen from 900°C and 1000°C for pure titanium and from 1000°C and 1100°C for the Ti-6Al-4V alloy. Further, the paper deals with line MG63 live bone cells deposited on a titanium base substrate. Proliferation and differentiation are monitored of cells during 7-day in vitro cultivation portraying growth of cells on a biologically selected material.
Precise Shoe-Material Cutting Using Image-Based Die Cutter Calibration for Punching Machine Tools
Chia-Hsiang Su, Horng-Horng Lin
Manufacturing Technology 2025, 25(1):113-119 | DOI: 10.21062/mft.2025.004
This paper proposes a set of stable auxiliary positioning modules for die-cutting shoe material by means of image-based die-cut calibration. Used in combination with a self-developed polygonal-object packing system for shoe-material cutting, the punching machine tool can automatically cut accurately, stably, and efficiently with the highly integrated hardware and software. In particular, the packing of the shoe material is based on the contour of the die-cut mold vector, and the object-dilation method is used to maintain a fixed gap between the objects. Then, a search method is employed to calculate a compact packing of the die-cut contours. The center...
Implementation of Mechanization into the Welding Process
Miloš Taraba, Ján Vavro, jr., Jan Vavro
Manufacturing Technology 2025, 25(1):120-130 | DOI: 10.21062/mft.2025.001
The article is focused on the investigation of the impact of the implementation of mechanization into the welding workplace, for the production of cylinders from austenitic X5CrNi18 10 chromium nickel steel. The welds are assembled into a production line for the processing of puff pastry. In addition to the technical improvement of the process and the verification of the sufficient quality of the welds, calculations were used to prove that after the implementation of the change, there was a significant reduction in the production time. By introducing a higher level of mechanization and necessary technological changes, the production time was reduced...
Study on Trapped Oil and Cavitation of Jet Fuel Gear Pump
Wei Xu, Xianfeng Zhao, Hongyan Shi, Lijuan Huang
Manufacturing Technology 2025, 25(1):131-142 | DOI: 10.21062/mft.2025.005
In order to explore the causes of trapped oil and cavitation formation during the operation of aviation fuel gear pump to ensure the safe and reliable operation of the pump, dynamic grid technology and Realizable were adopted. The k-ε turbulence model and Schnerr-Sauer cavitation model were used to simulate the three-dimensional transient state of the jet fuel gear pump. The results show that: 1) the air bubbles are mainly distributed in the tooth cavity of the inlet end of the gear pump due to the low inlet pressure and the vortex. 2) Under the effect of high pressure and bubbles at the outlet, an approximately closed tooth cavity is formed near...
Investigation on the Effect of Nano-Cutting Liquid on the Cutting Quality of Large Diameter Silicon Wafer
Wei Zhang, Lixian Wang
Manufacturing Technology 2025, 25(1):143-151 | DOI: 10.21062/mft.2025.013
To enhance the effective penetration of cutting fluid into the depth of the cutting joint, a nano-cutting liquid atomization method has been proposed to improve the cutting quality of diamond wire sawing. A six-inch large diameter silicon wafer (150 mm diameter) diamond wire saw cutting experimental platform was constructed. The base liquid, nano SiO2, and nano SiC cutting liquid were utilized as the cutting fluids, and various cutting solutions were employed to compare the cutting quality of large diameter silicon wafers. The temperature field change, surface roughness of the silicon wafer, surface morphology, and warping of the silicon wafer were...