Polymer Concrete Composite – Preparation of Testing Samples

Presented article is focused on manufacture of composite materials based on polymer concrete mixtures. Article describes the very essence of polymer concrete as well as the properties of its individual possible components. In the second part, the paper deals with specific materials, machines and utilities, which are used in the manufacture of composite. The third part of the article describes the manufacturing process itself and the individual stages of production. Conclusion includes the acquired knowledge of the production as well as other possible improvements of the process

Tensile properties of four types of ABS lattice structures—A comparative study

This article aims to compare the behaviour of four types of lattice structures named Cartesian, Rhomboid, Octagonal, and Starlit under tensile stress loading. The structures were made of Acrylonitrile Butadiene Styrene (ABS) material using the Fused Filament Fabrication (FFF) technique with three different specific volumes (24, 42, and 60%). Five samples of each type were produced, and a total of 60 samples were tested. Experimental testing was performed according to EN ISO 527-1:2012 and EN ISO 527-2:2012. The obtained data were statistically processed, while no outliers were identified. The experimental results pointed out that the specimens' topology, together with the specific volume, very significantly affected the resultant ABS properties of the tested samples made of the same material. The comparative study showed that in terms of ultimate strength, yield strength, and Young's modulus, the Cartesian structure appeared to be the most suitable for tensile stress, and the least suitable structure was the Rhomboid structure. On the other hand, the Rhomboid-type of the structure showed not only the highest amount of absorbed energy but also the highest toughness among the investigated lattice structures, so in the near future, its behaviour under an impact test should be studied.Ministerstvo školstva, vedy, výskumu a športu Slovenskej republiky, (APVV-19-0550); Kultúrna a Edukacná Grantová Agentúra MŠVVaŠ SR, KEGA, (005TUKE-4/2021, 032TUKE-4/2022)The authors would like to thank the Ministry of Education, Science, Research, and Sport of the Slovak Republic for the direct support of this research through the projects APVV-19-0550, KEGA 005TUKE-4/2021 and KEGA 032TUKE-4/2022. [APVV-19-0550, KEGA 005TUKE-4/2021]; Ministry of Education, Science, Research, and Sport of the Slovak Republic [032TUKE-4/2022]; KEG

Influence of focusing tube wear on vibrations and surface roughness

Rad se bavi ispitivanjem utjecaja istrošenosti fokusirajuće cijev na kvalitetu površine i vibracije koje proizvodi abrazivni vodeni mlaz, putem eksperimenata. Pokusi se bave procjenom utjecaja istrošenosti fokusirajuće cijevi na kvalitetu površine i parametre vibracija nastalih rezanjem abrazivnim vodenim mlazom. Glavni zadatak prvog eksperimenta bio je proučiti značaj četiri odabrana faktora nezavisnih varijabli (istrošenost fokusirajuće cijevi, brzina prijelaza, protok abrazivne mase i tlak) potpunom faktorijalnom analizom na dvije razine. Cilj drugog eksperimenta bio je istražiti utjecaj istrošenosti fokusirajuće cijevi na parametre vibracija. Uočeno je da istrošenost fokusirajuće cijevi ima značajan negativan utjecaj na kvalitetu površine i parametre vibracije.The paper deals with the study of the focusing tube wear influence on surface quality and vibrations produced by abrasive waterjet by means of experiments design. The experiments deal with evaluation of the influence of focusing tube wear on surface quality and parameters of vibration generated by abrasive waterjet cutting. The main task of the first experiment was to study the significance of four selected factors of independent variables (focusing tube wear, traverse rate, abrasive mass flow rate and pressure) by full factorial analysis at two levels. The aim of the second experiment was to study the influence of focusing tube wear on the vibration parameters. It has been observed that focusing tube wear has a significant negative influence on surface quality and parameters of vibration

Water jet technology using at orthopaedic surgery

Rad se bavi mogućnošću uporabe tehnologije vodenog mlaza i njegovom preinakom za rezanje koštanog tkiva i bio-materijala. Sažima sadašnje stanje znanja, definira probleme s tehnološke i kirurške točke gledišta, kako bi se povećala kvaliteta liječenih klijenata. Članak predstavlja pregled i prvi korak ka uporabi tehnike vodenog mlaza u ortopediji, tijekom rastavljanja međuspoja između kosti i bedrenog stabla.The paper deals with potential uses of water jet technology and its modification for cutting of bone tissue and bio-materials. It summarises the present state of the art, defines problems from the technological and surgical point of view in order to increase the quality of treated clients. The paper represents an overview and the first step towards using water jet technique in orthopaedic surgery, during dissintegration of interface between bone and femoral stem

Information system development for increased production process sustainability planning

The current era is characterized by rapid developing in all areas of society, but the most rapid expansion is in the field of science, knowledge, and technology. Galloping accessibility of the novel materials and technologies creates requirements of complex evaluation of their deployment to obtain economic and ecological sustainability. The authors of the paper present a proposal for a methodology enabling an effective decision-making process when choosing material and technological processes suitable for the manufacturing of products. This methodology was developed to enable the efficient evaluation of a wide range of materials, manufacturing technologies, including existing additive and hybrid and with focus on future and emerging technologies, too. The evaluation focuses on sustainability approach to minimize negative social and environmental impact while ensuring the required level of safety and profitability. © 2023 The Authors. Published by Elsevier B.V.Department of Production Engineering of Tomas Bata University in Zlin; Ministerstvo školstva, vedy, výskumu a športu Slovenskej republiky; Agentúra na Podporu Výskumu a Vývoja, APVV, (SK-CN-21-0046); Kultúrna a Edukacná Grantová Agentúra MŠVVaŠ SR, KEGA, (032TUKE-4/2022

TRIBODIAGNOSTIC INVESTIGATION ON OIL FILTRATION: RESULTS FROM A NOVEL APPARATUS

The paper deals with the analysis of tribodiagnostic parameters of oil filter device in order to investigate the possibility to launch a thorough treatment of non-invasive filtration of oil during the full operation of machinery and equipment. The monitored values show stabilization at levels in which the contamination cannot damage machinery and equipment and their individual components. It is shown that with this method the oil becomes a very important indicator and gives immediate representation of the internal condition of the tribosystems in the machine by using several tribotechnical analysis described in the paper. Filtration analysis during experiments was conducted with non-invasive method in four steps. As first filling of filtration system, measurement with a filtration after measurement comes scavenging of expansion vessel and in the end emptying system. The desired level of purity of the oil system becomes a standard value for the next period of operation, and any deviation of analyzed values can be almost immediately identified. Manuscript highlights: • Investigation on non-invasive filtration of oil during the full operation of machinery and equipment • Non-invasive filtration experimental analysis of used oil after filtration • Experimental effectiveness evaluation of the filtration • Purity of the oil system becomes the target value for the online monitorin

Possibilities of increasing production efficiency by implementing elements of augmented reality

The publication reflects the current situation concerning the possibilities of using augmented reality (AR) technology in the field of production technologies with the main intention of creating a tool to increase production efficiency. It is a set of individual steps that respond in a targeted manner to the possible need for assisted service intervention on a specific device. The publication chronologically describes the procedure required for the preparation and processing of a CAD model. For this preparatory process, the PTC software package is used which meets the requirements for each of the individual operations. The first step is the routine preparation of CAD models and assemblies. These are prepared based on real models located on the device, and their shape and dimensions correlate with the dimensions of the model on the device. The second phase is the creation and timing of the disassembly sequence. This will provide the model with complete vector data, which is then paired with the CAD models in AR. This phase is one of the most important. It determines the location of the model concerning its relative position on the device, provides information on the relocation of parts of the model after the sequence is started, and essentially serves as a template for the interactive part of the sequence. The last two phases are used to connect CAD models with vector data, determine their position for the position mark, and prepare the user interface displayed on the output device. The result of this procedure is a functional disassembly sequence, used for assisted service intervention of a worker in the spindle drive of the Emco Mill 55 device

Software Support of Modelling using Ergonomic Tools in Engineering

One of the preconditions for correct development of industrial production is continuous interconnecting of virtual reality and real world by computer software. Computer software are used for product modelling, creation of technical documentation, scheduling, management and optimization of manufacturing processes, and efficiency increase of human work in manufacturing plants. This article describes the frequent used ergonomic software which helping to increase of human work by error rate reducing, risks factors of working environment, injury in workplaces and elimination of arising occupational diseases. They are categorized in the field of micro ergonomics and they are applicable at the manufacturing level with flexible approach in solving of established problems

Mathematical Modeling of Temperature Characteristics of RFID Tags with their Subsequent Application in Engineering Production

Present-day and fast development of technologies and their use is unlimited in today´s time. An illustration is the ever-increasing expansion of RFID technology that can be applied to any materials or products in almost every industry. The engineering production is not exception within application in manufacturing. The substance of an RFID technology consists in ensuring early information about the unsuitable state of material, component etc. in engineering production. This article is focused on the issue from the field of radio-frequency identification. Applicability of RFID tags is dependent on conditions of environment in which the system is suggested. The basic characteristics of tags are generally informed by producer but in the case of its specific requirements, it is necessary to verify the application itself or it can be verified by direct experimental method. The aim of measurement is identification and evaluation of qualitative parameters for the RFID tag Confidex depending on temperature of environment. This article contains a description of using devices, selected method of measurement and realization of experiment

Using simulation software Witness in composites manufacturing industry

The aim of this paper is to describe the use of simulation software in the manufacturing industry. We used the simulation by the final separation of the fabric from waste tires. Waste tires are the main components in the manufacture of new composite material. Advantage of the simulation program Witness is in the field of possibility to choose the right technology process of final purification. Simulation of the final purification techniques and the material flow in the enterprises saves financial resources, and especially decreasing the work time required for pre-production stage for the manufacture of composite materials