Michal Sustr, Jaroslav Zacal, Peter Dostal, Oldrich Cerny, Miroslav Pristavka, David Dobrocky, Stefan Gaspar and Jan Pasko
The article deals with the use of acoustic emission to identify the formation of cracks during the mechanical loading in the corrosive attacked weldment S235JR+N. The experiment includes the methodology for continual record of emissive signals, data analysis and monitoring of material response to monitor mechanical stress effect in real time. There is possibility to observe response of corrosive degraded samples in real time during mechanical stress through the suitably designed methodology of detection, process and analysing of acoustic emission signals. It is possible to gain new information about processes rising inside the material by this way of data measurement. The signals of acoustic emission can be used as the way of identification for the micro cracks rising in the inner and also external structure of effortful materials.
The subject of this publication is to analyze the circumstances and causes of accidents at work in a selected industrial enterprise that provides services in the field of waterjet cutting and laser beam. The paper present the statutory definition of an accident at work and its basic categories (light, heavy, mortal and collective accident). It also discusses the most popular accident investigation method – the TOL method, which classifies the causes of accidents into three basic groups: material-technical, organizational and human. In the further part of the work the characteristics of the waterjet operator’s work station were made, including the scope of activities, possible occupational hazards and preventive actions. Next, the results of the analysis of the circumstances and causes of accidents at work were presented. In the period from 2013 to 2018 eight accidents were reported, resulting in minor injuries, such as cuts and cuts, fracture of the phalanx, overloading of the spine, leg twisting or knee injury.
The work identifies and analyzes fire hazards in a selected plant - the fuel base. On this basis, the risk of these risks was estimated and methods of their prevention were established using the PHA method.
Erika Škvareková, Marianna Tomašková, Gabriel Wittenberger and Štefan Zelenák
The purpose of this article is to determine the environmental impacts of underground gasification on the population and to analyze the risk of underground coal gasification (UCG) activities using selected risk assessment methods. Coal gas is a regular part of coal deposits and its extraction also allows the use of coal deposits that cannot be extracted by traditional methods. These technologies bring both positive and negative aspects. The paper points out the risk analysis, hazard identification and assessment during the operation of UCG technology using a risk graph and a risk matrix. Identified risks to workers that cannot be reduced should be taken into consideration and appropriate safeguard should be used. For each risk, it is necessary to inform employees about regular education and training. From worldwide experience with this technology, it is possible to analyze risks in Slovakia. Actual gasification produces polluting gases such as carbon dioxide, carbon monoxide, hydrogen sulphide, hydrogen sulphide, nitrogen oxides, tar and ash, and creates a risk that may occur on and under the surface of the site depending on the geological and hydrogeological structure of the deposits. Possible measures to mitigate the adverse effects are proposed for the implementation of this technology. Coal is still one of the main domestic primary energy sources. Currently, only 5 out of 19 deposits in the Slovak Republic are used. Underground gasification could increase the use of Slovak coal and brown coal deposits.
The paper presents a modification of the slitting pass system, which ensured a reduction in roll wear during three-strand rolling of ribbed bars with a diameter of 16 mm, and thus reduced the associated costs. The theoretical and experimental research on the rolling process of ribbed bars with a diameter of 16 mm rolled in three-strand technology was carried out on a D350 18-stand continuous bar rolling mill conditions. To determine the cost of slitting pass wear, the results of numerical calculations of the frictional force unit of work obtained using the Forge2011® computer program was used, as well as empirical calculations.
The review of definitions allows to state that knowledge management in enterprises is a complex, multi-aspect process requiring the implementation of a number of interrelated mechanisms and instruments. Sharing knowledge can increase employee productivity, team performance and the ability to transform diversity into creativity and organizational innovation. Sharing of knowledge in the enterprise should be implemented both in a formal and informal way and be supported by appropriate communication mechanisms, employee exchange programs, job rotation, mentoring relations, techniques Only a well-constructed, implemented and modified system can ensure achieving the intended goals related, among other things, to ensuring the proper functioning of quality assurance mechanisms. and tools for assessing teamwork, a z system promoting creativity and cooperation. The main purpose of the publication is to present the results of research conducted on a sample of 22 enterprises regarding the analysis of the extent of enterprises’ use of knowledge and human capital potential to improve the quality management. The research focused mainly on the impact of selected elements of management of knowledge and human capital on the level of employee awareness, as well as the number and type of non-compliance of products. The study used a questionnaire and statistical analysis of data from manufacturing processes.
The publication presents the results of research on the scope of practical use of available methods and tools of quality management by enterprises. The analysis was based on surveys conducted at the Production Management Institute of the Faculty of Production Engineering and Materials Technology of the Częstochowa University of Technology. The presented study applies only to the information collected so far as the research work commenced is still being continued. Currently, data (correctly completed questionnaires) has been collected from fifty one small, medium and large production companies located primarily in the Śląskie and Łódzkie region. Both the organizations surveyed for the needs of this project and the cases cited in the literature indicate that the group of the most commonly used tools and methods is quite limited and in a sense comes down to the most known. This situation may partly result from the specifics of the industry and the nature of production. In addition, providing questionnaire response suggestions (as examples, the most frequently used methods and techniques) may have influenced the choices made by the respondents. At the same time, in some cases, low awareness or insufficient substantive knowledge may have contributed to the belief among the respondents that the techniques are implemented in the enterprise while in reality these techniques have never been used. All remarks and observations noticed at this stage of the research will be taken into account in subsequent analyzes.
Michal Sikora, Petr Janík, Pavlína Pustějovská and Simona Jursová
The chapter deals with the use of traditional carbonaceous fuels in the production of agglomerates. An important part is focused primarily on the use of these carbonaceous fuels in the production of various types of agglomerate. Anthracite together with coke breeze was tested as a fuel to assess the substitution of coke dust by anthracite for technological and qualitative parameters of sintering.
The article deals with the assessment of production process capability in the serial production of plastic components. The plastic component was used for analysis. Component is used in the automotive industry in car suspension shock absorbers. Assessing the capability of the product’s manufacturing process is very important. The aim of the present paper is to measure the dimensional characteristics of a thermoplastic product as a monitored quality feature. The analyzed product is manufactured in an eightfold injection mold by injection technology. The products from each injection mold cavity were considered separately. Process capability was assessed using capability indices. Process variability and centering were evaluated. Based on the analysis we can say that the production process is in excellent condition.
Efficient functioning in the contemporary market is a fundamental need of every organization. In times of globalization and an intensive technological and engineering progress, attaining a proper position and retaining it is a big challenge in almost every branch of industry. This is especially difficult for the SME sector, as it requires financial expenditures on system solutions and the IT base, among other things. This is where “Cloud Computing” comes in. Cloud computing services consist in providing and making available IT resources (efficient, scalable and tailored to the customer’s needs) through the Web. Thanks to wide access to intensively developing mobile systems, the low costs of computer components and the associated increasingly common use of Internet of Things (IoT) in numerous devices connected to the Internet, data processing is being gradually moved onto the Web peripheries. The purpose of the study is to highlight advantages and possible threats associated with the use of Cloud Computing-based solutions for aiding the activity of enterprises at a varying organizational level following the 4th industrial revolution.