• MACHINES

    Example of the maintenance of a machine pero (D 2504-019) for cleaning metal parts in the working conditions of OEM company from the autotive industry

    Machines. Technologies. Materials., Vol. 17 (2023), Issue 7, pg(s) 255-258

    In this article, it will present a example of the maintenance of a machine PERO (D 2504-019) for cleaning metal parts in the working conditions of renowned OEM company in producing filters from automotive industry. The maintenance process is of particular importance in order to use production capacities to the maximum extent. Maintenance is an indispensable segment of any production system. It follows that maintenance should be adapted to these conditions, and be economical and efficient, so as not to slow down the progress of the production system. Various maintenance methods have developed alongside the development of technology, all with the aim of increasing efficiency and reducing costs. This entails the need for increasing knowledge and skills of the workers themselves in the maintenance system. Large sums of money are invested in modern industry, in order to prevent monetary losses caused by system failures. If the machine tools, devices, and accessories are not maintained on time and adequately, there will be a stoppage of production, which is extremely inconvenient for the company. When the machine stops, delivery is delayed, which leads to a psychological effect on the worker, who is then put under pressure to make up for lost time. In this article, the whole procedure of cleaning, mantenance and inspection of machine PERO (D 2504-019) through 13 steps has been studied. The indicators of the reliable operation of the analyzed machine through the analysis of the machine’s operation, the analysis of downtime, and the analysis of the occurrence of failures through the obtained values of MTTR (Mean Time to Repair) and MTBF (Mean Time Between Failures) are presented in details.

  • BUSINESS

    Contribution to general safety measures at the construction site in practice

    Science. Business. Society., Vol. 8 (2023), Issue 2, pg(s) 47-50

    In this paper, the author will point out the determinants of safety and security at work in the context of the requirements of the HSEQ (Health, Safety, Environment and Quality) standard with practical application on the construction site in the context of maintenance of technical systems. The key determinant in the occupational safety approach in the context of general safety and maintenance of technical systems is prevention. Prevention implies planned and undertaken safety measures in every work procedure at the employer, with the aim of preventing or reducing risks at work. When basic organizational safety measures, i.e. basic rules and equipment for work protection, cannot eliminate or sufficiently limit the risks to the safety and health of workers, the employer is obliged as part of specific security to provide additional appropriate protective equipment and additional work protection measures, and ensure the training of workers in order to use it in a prescribed and correct manner. In this paper, the author will give numerous examples of the practical application of specific safety in specific working conditions. In this paper, the author will give examples of the application of prevention and general work safety with risk assessment on the construction site in the specific case of a renowned company with extensive international experience.

  • TRANSPORT. SAFETY AND ECOLOGY. LOGISTICS AND MANAGEMENT

    Decade of road markings and traffic signs quality testing in Croatia

    Trans Motauto World, Vol. 7 (2022), Issue 1, pg(s) 25-29

    With more than 1.35 million fatalities worldwide each year, road crashes are among the world’s most significant public health and injury prevention problems. In the last decade, with the new technological breakthroughs, a significant effort has been devoted to improving different safety systems related to infrastructure and vehicles. Road marking and road signs represent main road elements whose main task is to provide timely and necessary information to the drivers related to the upcoming situation. In other words, they warn and inform drivers about the conditions and construction characteristics of the road, guide road users through the traffic network and regulate traffic in a safe way. Therefore, continuous monitoring and testing of their quality is of great importance for road safety in general. The a im of this paper is to present Croatian experience regarding the quality testing of road markings and signs in last decade. Overall, the analysis confirmed that systematic control of road markings and signs will positively affect their quality and optimize maintenance activities

  • Optimizing the periodicity of machine maintenance with respect to the underused resource

    Mechanization in agriculture & Conserving of the resources, Vol. 64 (2018), Issue 6, pg(s) 203-204

    The intensity of aging and wear of the components /aggregates and assemblies/ of the machines is different and hence the necessity of carrying out repair service interventions has different periodicity and volume.
    A model has been developed to optimize the periodicity of maintenance of machine components, taking into account the losses from the underuse of their resource.
    The influence of the parameters of the law and the economic indicators on the optimal periodicity of the maintenance was examined at the density of the distribution of work until failure to the Weibull distribution.

  • Optimization of the frequency of the technical service of machines with reliance of reliability

    Mechanization in agriculture & Conserving of the resources, Vol. 64 (2018), Issue 6, pg(s) 200-202

    A key element in the machinery management policy is its rational use by optimizing the periodicity of maintenance and repairs. The influence of the numerical characteristics and parameters of the reliability indicators distribution on the optimal periodicity of the maintenance has been investigated. Analytical dependencies for determining the complex reliability indicators of the objects at the optimal periodicity of the prophylactics are proposed.

  • Risk management in context of Industry 4.0

    Industry 4.0, Vol. 3 (2018), Issue 6, pg(s) 340-342

    Prevention 4.0 as part of the enterprise’s safety culture is developing HSE management system to address new challenges in prevention. Industry 4.0 anticipates new linkages between technology, man, and management systems to apply the most efficient IT systems to ensure the flexibility of the production process so that its output is a product that takes into consideration customer requirements. These changes include the existence of new types of risk due to the change of the position of man from the classical production centers to the area of superstructure activities, programmer, setter, maintainer, security technician for the digitization of production processes. Risk identification is based on defining the hazards and threats of a complex manufacturing system in the context of Safety and Security – Sa&Se, their formulation so that characteristic parameters can be efficiently digitized within the manufacturing process.

  • TECHNICAL FACILITIES FOR ENSURING SECURITY

    MAINTENANCE OF TECHNICAL SYSTEMS IN THE FUNCTION OF SAFETY AT WORK

    Security & Future, Vol. 2 (2018), Issue 1, pg(s) 51-54

    Safety engineering is consistently promoted and there is an evident need for improvement and development. The maintenance process is dependent on the method of editing and organizing the setup and execution of such kind commitments.
    Working with the maintenance system itself determines the manner of maintenance.
    Тhe contractor’s responsibility for providing a high level efficiency of system maintenance because the process involves detecting and reducing degradation and restoring the functions of the system in working order.
    The purpose of this paper is to overcome the shortage of updating data for occupational safety for maintenance, knowledge and to introduce new methods to protect workers and the working environment, as well as monitoring the current trends and standards.

  • TECHNOLOGICAL BASIS OF “INDUSTRY 4.0”

    PRODUCTION STATE IDENTIFICATION USING RAW ETHERNET DATA OF TOTAL POWER CONSUMPTION IN A CYBER-PHYSICAL FACTORY

    Industry 4.0, Vol. 2 (2017), Issue 6, pg(s) 245-248

    Complex production systems are increasingly using Industrial Ethernet for connecting MES, PLCs, Touch Control, and even sensors and actors within the industrial control network. While today’s production is still process driven under MES control, digitalization requires a data driven approach with cyber physical systems acting autonomously in a connected production world. Moving away from a centralized control architecture has the advantage of more flexibility but eliminates the implicit knowledge on global parameters such as the current condition or state of the overall machinery. This paper describes a methodology to retrieve these global parameters independently from any control system and fully transparent to the control network. A data sensor device is introduced that can listen to any Ethernet data traffic. Together with a specialized packet rules engine it is used to extract and combine information out of a raw Ethernet data stream to build up a virtual sensor device. A production state identification sensor is described as an example application of the virtual data sensor device.

  • TECHNICAL FACILITIES FOR ENSURING SECURITY

    COMPARATIVE ANALYSIS OF THE ARMAMENT AND EQUIPMENT SUPPORT MODULES IN THE FIELD OF COMMAND AND CONTROL INFORMATION SYSTEMS OF NATO ARMIES

    Security & Future, Vol. 1 (2017), Issue 4, pg(s) 163-167

    In the paper is made a comparative analysis of the armament and equipment support modules in the field of information systems for command and control of NATO armies and the main functions of each information system for maintenance of the logistical assurance.

    The classification of information systems is made depending on the integration capabilities with Microsoft products ,as well as depending on the capabilities of deploying emerging technologies such as remote monitoring, remote control, and more.

  • BUSINESS & “INDUSTRY 4.0”

    INTERACTIVE APPROACHES TO THE ORGANIZATION OF STAFF INTERACTION WITH AUTOMATED CONTROL SYSTEMS

    Industry 4.0, Vol. 2 (2017), Issue 2, pg(s) 91-94

    Until now, the majority of ergatic control systems in various technological areas are based on a functioning independent of the maintenance process. This approach reduces the efficiency of maintenance and the safety of the system. The report proposes an alternative model of the system’s behavior, based on interactive interaction with both operational and technical staff.

  • PROBLEMS RELATED TO MAINTENANCE OF AGRICULTURAL EQUIPMENT IN BULGARIA

    Mechanization in agriculture & Conserving of the resources, Vol. 61 (2015), Issue 12, pg(s) 25-27

    Maintenance of agricultural equipment is carried out by agricultural equipment dealer in Bulgaria. Their business interests forbid them to implement strategies that decrease maintenance costs, such as proactive maintenance or condition based maintenance. For this reason farmers incur unnecessary financial losses. This article shows the necessity and effectiveness of implementing early diagnosis in agricultural equipment maintenance.

  • USE OF FAULT TOLERANT CONTROL SYSTEMS IN AGRICULTURE MACHINERY

    Mechanization in agriculture & Conserving of the resources, Vol. 61 (2015), Issue 7, pg(s) 3-6

    The active fault-tolerant control approach relies heavily on the occurred faults. Higher performances and more rigorous security requirements have invoked an ever increasing demand to develop real time fault detection and isolation system. The problem of fault diagnosis using analytical redundancy (model-based) methods has received increasing attention during recent years due to the rapid growth in available computer power. The main objective is to design and maintenance a fault-tolerant control system which guarantees a high overall system reliability and dependability both in nominal operation and in the presence of faults. Such an objective is achieved by a control performance index, which is proposed based on system reliability analysis. The methods involve generation and evaluation of signals that are accentuated by faults that have actually occurred. The procedures for generating such signals, called residuals, are based on two main distinct approaches. Direct approach consists in the elimination of all the unknown variable , keeping input-output relations involving only observable variables. Indirect approach estimates states, outputs or parameters in order to generate discrepancy signals obtained by the difference between the actual variables and their estimates.