Grzegorz Krolczyk

Grzegorz Krolczyk
Opole University of Technology · Department of Manufacturing Engineering and Automation Products

Professor

About

292
Publications
109,278
Reads
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7,245
Citations
Citations since 2017
219 Research Items
6725 Citations
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201720182019202020212022202305001,0001,5002,000
201720182019202020212022202305001,0001,5002,000
201720182019202020212022202305001,0001,5002,000
Additional affiliations
November 2019 - September 2020
Opole University of Technology
Position
  • Vice Rector for Research and Development

Publications

Publications (292)
Article
The purpose of the study is to determine the coated carbides tool life and the tool point surface topography. The study determined the cutting conditions in the process of turning duplex stainless steel (DSS), and detailed identification of wear mechanisms occurring on the rake face and major flank. The results of wear occurring on both tool points...
Article
In this paper the surfaces of butt welded joints in steel tubes were analyzed using an optical 3D measurement system to determine the morphology and topographic parameters. It was established that pollution of the argon shield gas with oxygen did not influence the width of the heat-affected zone. However, the composition of the shield gas significa...
Article
This work concentrates on the modeling of cutter's displacements during ball end milling with various surface inclinations. The cutter's displacements (vibrations) model including: tool's geometry, cutting conditions, surface inclination angle, run out and tool's deflections (induced by the cutting forces) was proposed. Subsequently, this model was...
Article
In this paper the surfaces of high-strength steels were analyzed using an optical 3D measurement system to investigate into the surface morphology and parameters of surface topography. Analyzed surfaces were generated by the most commonly used in the production facilities of manufacturing processes. The study was conducted for 400 HB plates. It was...
Article
The machinability of nickel-based alloys is affected by the amount of friction and heat produced through machining. The usage of metalworking fluids raises concerns about the operator's health and environmental impact. Therefore, minimum quantity lubrication (MQL) is preferred as one of the cooling/lubrication alternatives to achieve enhanced machi...
Article
Structural health monitoring (SHM) has been recognized as a useful tool for safety management and risk reduction of offshore wind farms. In complex offshore environment, jacket structures of offshore wind turbines are prone to damages due to corrosion and fatigue. Effective SHM on jacket structures can substantially reduce their operation risk and...
Article
The paper presents an important issue concerning the size and concentration of copper nanoparticles in a nanofluid. The influence of nanoparticles on the stabilization of the nanofluid, tool vibrations during turning of 316L stainless steel and the machined surface topography were described. Four sizes of Cu nanoparticles were used: 22 nm, 35 nm, 6...
Article
The aerospace and automotive industries make extensive use of aluminium and its alloys. Contrarily, machining of aluminium (Al) alloys presents a number of difficulties, including, but not limited to, poor surface finishing, excessive tool wear, decreased productivity etc. Therefore, it's very important to measure the machining characteristics duri...
Article
Full-text available
The aerospace and automotive industries make extensive use of aluminium and its alloys. Contrarily, machining of aluminium (Al) alloys presents a number of difficulties, including, but not limited to, poor surface finishing, excessive tool wear, decreased productivity etc. Therefore, it’s very important to measure the machining characteristics duri...
Preprint
Full-text available
Surface defects of lithium batteries seriously affect the product quality and may lead to safety risks. In order to accurately identify the surface defects of lithium battery, a novel defect detection approach is proposed based on improved K-Nearest Neighbor (KNN) and Euclidean clustering segmentation. Firstly, an improved Voxel density strategy fo...
Article
The tobacco flavoring process is an important procedure in production stage. During the flavoring process, the cut tobacco is endowed with a unique flavor to stabilize the production quality. Most of the flavoring process in tobacco enterprises is finished in the drum, and the internal structure of the drum (including the number, angle and installa...
Article
A computational approach is developed for multi-physics modelling of Insulated Gate Bipolar Transistor (IGBT) module considering the electrical-thermal-mechanical coupling effect. In this approach, the tetrahedral elements are used to build the finite element domains of an efficient IGBT model. Then, the discretized system equations of the IGBT mod...
Article
Powerful belt conveyor is the crucial transportation equipment for coal mining. Keeping its stable operation is essential to ensure the coal mining efficiency. At present, damage detection systems based on machine vision are widely studied and deployed. Clear images are the foundation for successful damage detection. However, in the harsh environme...
Article
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Due to the relatively cheap price of diesel, most Marine engines use diesel as Marine fuel, but its emissions contain a lot of carbon. To reduce carbon emissions, International Maritime Organization (IMO) has established an Energy Efficiency Design Index (EEDI) and Energy Efficiency Existing-Ship Index (EEXI). Currently, a popular way is to reduce...
Article
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Rotating machine is a common class of machinery in most of the industry and the main root cause of machinery failure is a faulty bearing. Bearings are most widely used in various types of machine elements ranging from small to heavy machinery and the common cause of machinery failure is a fault in bearings. Bearing faults can be external or interna...
Article
There is the problem with a proper selection of areal parameters that describe a surface texture. Analysis of the linear correlation between parameters can be helpful in the selection of parameters. One hundred surface topographies after five machining treatments (grinding, polishing, vapour blasting, milling, and one-process honing) were measured...
Article
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In recent days, the utilization of lightweight alloys for various applications has been increased massively. Starting from the automobile industry, aerospace industry, and even in the biomedical field, there is a need for dissimilar precise joining of steel to other light alloys (magnesium alloy, aluminum alloy, titanium alloy). However, those allo...
Article
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“External magnetic-field (EMF)” has been proved as an additional process parameter like voltage and current affecting the weld arc form, molten metal-flow, microstructure, and characteristics of the weld joint. This article analyzed the research work that has been done to promote EMF application in welding and discussed the recent development trend...
Article
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This paper presents analysis and comparison into mechanical behaviour and microstructural attributes of postweld heat-treated AISI 1020 (0.21%-C) plates joined by the shielded metal arc welding (SMAW) process. The purpose of this work is to heat the welded samples uniformly so that a possible formation of austenite can be obtained, and hence, resid...
Article
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For several industries, the traditional manufacturing processes are time-consuming and uneconomical due to the absence of the right tool to produce the products. In a couple of years, machine learning (ML) algorithms have become more prevalent in manufacturing to develop items and products with reduced labor cost, time, and effort. Digitalization w...
Article
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This paper deals with the concerns of industrial demand for enhancing the machinability of Inconel 718. In this regard, sustainable cooling strategies, i.e., minimum quantity lubrication (MQL), electrostatic minimum quantity lubrication (EMQL), and liquid carbon dioxide (LCO 2), in combination with ultrasonic-assisted turning, are used to reduce th...
Article
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Selective Laser Melting (SLM) process has a great potential to create unique 3D components of AlSi10Mg with exceptional degrees of freedom for wide range of applications in industries. However, the presence of porosity and other defects influenced by process parameters can be harmful to fabricated components in some applications. Process parameters...
Article
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Aiming at the distributed flexible job shop scheduling problem under dual resource constraints considering the influence of workpiece transportation time between factories and machines, a distributed flexible job shop scheduling problem (DFJSP) model with the optimization goal of minimizing completion time is established, and an improved mayfly alg...
Article
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Due to the complexity of the production shop in discrete manufacturing industry, the traditional genetic algorithm (GA) cannot solve the production scheduling problem well. In order to enhance the GA-based method to solve the production scheduling problem effectively, the simulated annealing algorithm (SAA) is used to develop an improved hybrid gen...
Article
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This article describes the research carried out on six thin-walled groups of samples produced from the aluminum alloy 6060 T4 by a turning and milling operation. Additionally, the analysis of the surface topography was carried out, focusing on three-dimensional parameters, such as Sq, Ssk, Sku, Sp, Sv, Sz, Sa, Spd, and Spc. Moreover, the article co...
Article
The bottom pivot is a vital support device in the miter gate but often subject to poor lubrication and wear failures. Calculating the hydrodynamic lubrication characteristics of the bottom pivot is a complex three-dimensional (3D) problem, and most of existing models adopt simplified assumptions to reduce the calculation difficulty. To solve this i...
Article
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Milling is a high-performance method that allows an efficient machining of both flat and complexly shaped surfaces. During the milling process, the cutting tool (cutters), its cutting edges are constantly subjected to tool wear, which affects the accuracy and roughness of the processing. It is important to understand the current condition of the cu...
Article
Lattice structures are vital for biological applications because of its numerous benefits (for example, faster and stronger binding to bone tissue). Consequently, processing of lattice structure is a particularly popular area of study currently. In this study, additive manufacturing technologies utilized in several engineering disciplines were coll...
Article
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Stir-casting was employed to create Al-5.6Zn-2.2Mg-1.3Cu composites with particle sizes ranging from 30 to 90 μm and a weight fraction of 5–15 SiC articles. The mechanical and wear properties of the material have been assessed. The wear-behaviour of Al-5.6Zn-2.2Mg-1.3Cu composites was investigated using dry pin-on-disc wear testing. Various loads (...
Article
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A multi-case load spectrum compiling method is proposed in this study for dynamic modeling of a hydraulic excavator stick to simplify and accelerate the fatigue bench test. This new method includes a simplified criterion of small-load-omitting threshold based on the principle of invariable fatigue damage, an extreme value inference criterion based...
Article
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Hybrid bearing is a kind of bearing that uses ceramic materials instead of steel and other metal materials as rolling elements. It is often used to reduce (i.e., rolling or sliding) friction resistance. Although many published works have shown that hybrid bearings are more effective than ordinary bearings in reducing friction resistance, improving...
Article
The demand of accurate and real-time dynamics model has recently become critical for implementing effective vibration control in vehicles. The multibody dynamics method provides an appealing alternative for accurate modelling of closed-loop vehicles. In this work, vibration-suppression strategies for a vehicle traversing a bumpy road are proposed,...
Article
A Cross-linked microencapsulated phase change material (MEPCM) was prepared using butyl stearate as the core material and isophorone diisocyanate (IPDI) and triethanolamine (TEA) as the reaction monomers, while a Linear MEPCM was prepared using 2,4-toluene diisocyanate (TDI) and diethylenetriamine (DETA) as the reaction monomers. The thermal stabil...
Article
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Green Flow-drilling is eco-friendly and has benefits such as swift execution, clean drilling, chip-free machining and easy handling which attract manufacturers from aerospace and automotive industries in the recent years. Moreover, reinforcements in aluminium-matrix composites makes drilling more complicated in conventional drilling, because of the...
Article
Flywheel battery is an important device for energy storage in a hybrid energy system. The gearbox not only affects the efficiency of the flywheel battery, but also the quality of the output electrical energy. Carrying out effective and feasible research on fault diagnosis of the flywheel battery gearbox can improve operational reliability and reduc...
Article
In machining processes, there are contradictions between high efficiency and environmentally-friendly machining. This indicated that there is a major potential for sustainable machining to both increase efficiency and protect ecological balance. For this, the employment of effective methods has become imperative to reduce resource use. In this way,...
Article
Liquefied natural gas (LNG) as an alternative marine fuel is attracting interest from a variety of parties in its use for large and small ships due to the role in improving climate change. However, a broader range of ships including in particular ferries, cargo and offshore support ships is operating with dual-fuel LNG engines. Compared to the conv...
Article
Tool wear is an important parameter in the machining because the production, cost and performance is highly depend upon its performance. Therefore, the monitoring of cutting tool wear plays an important role in mechanical machining processes. With this aim, the present work deals with the application of novel ensemble deep learning model for cuttin...
Article
The underlying study propounds novel hyperbolic fuzzy entropy (HFE) and single valued neutrosophic entropy (NFE) based methodology for classifying the processing parameters employed for studying the wear-resistance of friction-stir-processing (FSP) of AA7075 aluminum, allow incorporated with B4C particles under different reinforcement conditions. F...
Article
The ship motion perception approaches mainly use maritime radar, Automatic Identification System (AIS) and cameras. However, using either of these approaches alone may result in information inconsistency and insufficient data accuracy. Therefore, a multi-sensor fusion perception system is proposed in this study to monitor ship motion in inland wate...
Article
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We propose an improved DNN modeling method based on two optimization algorithms, namely the linear decreasing weight particle swarm optimization (LDWPSO) algorithm and invasive weed optimization (IWO) algorithm, for predicting vehicle's longitudinal-lateral responses. The proposed improved method can restrain the solutions of weight matrices and bi...
Article
Hybrid lubri-cooling is a latest technology that provides synergistic cooling and lubrication effect in the machining area especially in the cutting of titanium and its alloys. In this current study, cryogenic-LN 2 , minimum quantity lubrication (MQL), and hybrid cryogenic LN 2-MQL are applied and compared against dry medium in perspective of in-de...
Article
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Unsupervised domain adaptation, which aims to alleviate the domain shift between source domain and target domain, has attracted extensive research interest; however, this is unlikely in practical application scenarios, which may be due to privacy issues and intellectual rights. In this paper, we discuss a more challenging and practical source-free...
Article
High energy consumption and exhaust emissions in the ocean have gradually come into view, and in the 21st century, most countries bordering the sea are gradually strengthening the construction of the ocean. Therefore, it is urgent to reform the energy structure of the ocean engineering platform, so as to increase the use of renewable energy in the...
Article
This paper investigates the coverage path planning issues and mapping platform construction for unmanned surface mapping vehicle (USMV). An improved BA∗ (IBA∗) algorithm is designed from the unit decomposition method and map update method to solve the problem of insufficient continuity and the high-precision environmental modeling. By means of task...
Article
Full-text available
On-line monitoring of the machining processes provides to detect the amount and type of tool wear which is critical for the determination of remaining useful lifetime of cutting tool. According to Industry 4.0 revolution, the machining performance in terms of cutting forces, surface roughness, power consumptions, tool wear, tool life, etc. needs to...
Article
This article aims at providing insights into various drilling operations relating to the production of holes of small diameter for film cooling, particularly inclined holes, in aero-engine turbine blades, made of Yttria-stabilized Zirconia (YSZ) coated superalloy. Drilling inclined holes on YSZ coated superalloys that find use in aerospace industri...
Article
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This work proposes a Kinect V2-based visual method to solve the human dependence on the yarn bobbin robot in the grabbing operation. In this new method, a Kinect V2 camera is used to produce three-dimensional (3D) yarn-bobbin point cloud data for the robot in a work scenario. After removing the noise point cloud through a proper filtering process,...
Article
Full-text available
When performing multiple target detection, it is difficult to detect small and occluded targets in complex traffic scenes. To this end, an improved YOLOv4 detection method is proposed in this work. Firstly, the network structure of the original YOLOv4 is adjusted, and the 4× down-sampling feature map of the backbone network is introduced into the n...
Article
Full-text available
The belt conveyor is an essential piece of equipment in coal mining for coal transportation, and its stable operation is key to efficient production. Belt surface of the conveyor is vulnerable to foreign bodies which can be extremely destructive. In the past decades, much research and numerous approaches to inspect belt status have been proposed, a...
Article
Full-text available
Through-feed centerless grinding is a high-productivity machining process widely used for mass production of cylindrical parts and rotationally symmetrical parts in automotive and bearing industries. Grinding process is strictly related to large amount of heat generated in the cutting zone, i.e., the interface between the workpiece and the abrasive...
Article
A hybrid flywheel-battery energy storage system is able to smooth the battery charging/discharging; harmful impact can be filtered by the flywheel to reduce battery damage and extend battery life. However, due to extremely high rotating speed of the flywheel, the hybrid storage system is often subject to mechanical failures in the flywheel transmis...
Article
Flywheel energy storage system (FESS) has been regarded as the most promising hybrid storage technique to manage the battery charging process of electric vehicles. Thanks to properly regulating with the FESS, the battery life can be significantly prolonged. In order to ensure the safety of the hybrid storage system, it is imperative to monitor the...
Article
Full-text available
The application of metalworking fluids (MWFs) are helpful in improving the tribological characteristics while machining difficult to cut materials like duplex stainless steel. However, the adverse effect of commonly used MWFs limits its application in the area of clean and sustainable manufacturing. The strict environmental concerns, policies and r...
Article
Full-text available
The flavoring process ensures the quality of cigarettes by endowing them with special tastes. In this process, the flavoring liquid is atomized into particles by a nozzle and mixed with the tobacco in a rotating drum. The particle size of the flavoring liquid has great influence on the atomization effect; however, limited research has addressed the...
Article
Full-text available
There are three motion stages for an industrial robot manipulator, including the acceleration stage, the constant velocity stage, and the deceleration stage. Aiming at reducing the residual vibration of the manipulator after the movement of the deceleration, a new method is proposed by configuring the movement parameters of the flexible manipulator...
Article
Full-text available
To solve the problem of low precision of pearl shape parameters’ measurement caused by the mutual contact of batches of pearls and the error of shape sorting, a method of contacting pearls’ segmentation based on the pit detection was proposed. Multiple pearl images were obtained by backlit imaging, the quality of the pearl images was improved throu...
Article
Full-text available
The belt conveyor is the most commonly used conveying equipment in the coal mining industry. As the core part of the conveyor, the belt is vulnerable to various failures, such as scratches, cracks, wear and tear. Inspection and defect detection is essential for conveyor belts, both in academic research and industrial applications. In this paper, we...
Article
In this work, a digital twin (DT)-driven approach is proposed to accurately predict structural fatigue life by establishing effective dual-information communication between a DT virtual model and a physical model of the structure of interest. The proposed DT virtual model consists of three modules (namely one crack tracking model, one high-precisio...
Article
This study investigates the impact of production scheduling decisions aims at improving productive and energy-efficient performances simultaneously in distributed blocking flowshops (EDBFSP). To reach a compromise between the conflicting objectives, a Pareto multi-objective optimization model based on the estimation of distribution algorithm (MOEDA...
Article
Being easily fabricated, welded, biocompatible, having a high strength-to-weight ratio, withstanding comparatively high temperatures up to 800 °C and low modulus of elasticity make grade titanium and its alloys an important choice for automotive , biomedical and aerospace industries. In contempt of the different pleasant assets of Ti-6Al-4V alloy,...
Article
Full-text available
Machinery will fail due to complex and tough working conditions. It is necessary to apply reliable monitoring technology to ensure their safe operation. Condition-based maintenance (CBM) has attracted significant interest from the research community in recent years. This paper provides a review on CBM of industrial machineries. Firstly, the develop...