Key Engineering Materials Vol. 669

Abstract: The paper presents a complex of information aimed at automated production systems structures and simulation. For production systems intergrated structures formation it uses logistic principles for making the internal material flow among various logistic nodes more precise and effective, including respective information flow, here e. g. with use of integrable and compatibile handling and technological systems, as well.

Abstract: One of the basic means of improving the reliability of technical equipment is increasing their reliability through targeted maintenance. When designing any technical equipment should be chosen minimum necessary set of technical resources that are necessary to the achievement of the required scope and quality of its functions. By setting an appropriate preventive maintenance plan can be timely and effective interventions to prevent adverse consequences of failure. This paper describes the proposal of optimal plan of preventive maintenance of experimental equipment designed for 3D machining rotating parts with AWJ technology.

Abstract: The decision-making process in the stage of technical preparation, during the planning of logistic portfolio and production queries is marked by individual decisions that may be affected by errors causing in extreme cases the fatal consequences. The tools of computer simulation help to eliminate the negative effects of bad decision-making. This article describes the usage of computer simulation in process of optimization of material flow using an appropriate spatial deployment of production facilities. The triangular method was used for the optimization of the spatial deployment. The factors to create the triangular method were obtained from the final report of the simulation of the current production state in the assessed facility. Subsequently a simulation of the proposed optimization variants was conducted. Based on the selected criteria, the most suitable alternative was chosen for the enterprise.

Abstract: Presented article describes the methodology of material flows planning for bearings production in digital factory. Article analyses the production programme on example in a several steps. It decides about organization of production into the lines and optimizes suggestion of production sequences. In the end of article it presents the basic production parameters. The target of article was creation of complete procedure for suggestion of manufacturing system of bearings production.

Abstract: The goal of the paper was to analyse model applications of mechanical equipment for hydrothermal treatment. Alternative 1 was an alternative with a treatment output of 14 500 Mg of processed material, the annual electricity and heat total production of 4000 MWh respectively 3800 MWh, total capital expenditure of 40 000 000 CZK, unit capital expenditure of 2759 CZK per 1 Mg of processed biodegradable material and annual operating expenses of 19 371 000 CZK. The net present value (NPV) is 1 061 000 CZK, the internal rate or return (IRR) totals 4.9%, the simple payback time (Ts) is 12.6 years and the discounted payback time (Tsd) is 19.2 years. Alternative 2 employing the mechanical equipment proved a potential increase in the treatment output to 18 125 Mg, and an increase in the electricity and heat total production to 5000 MWh respectively 4800 MWh, thanks to the shortened intensification of the anaerobic fermentation process. At the same time, the total capital expenditure rose to 43 000 000 CZK, the operating expenses rose to CZK 24 213 000. The unit capital expenditure of alternative 2 amounts to 2372 CZK per 1 Mg of the of processed biodegradable material. The NPV totals 8 329 000 CZK, IRR is at 6.7%, the simple payback time (Ts) is 10.8 years and Tsd totals 15.3 years.

Abstract: The article deals with on-line monitoring of heat sources with application of predictive system equipped with computational intelligence. In particular, an emphasis is given especially on efficiency, optimization of operation, predictability, and synergistic effects. The operation effectiveness will be evaluated from several perspectives such as the thermal properties of the objects, characteristics and properties of resources, and internal air quality. The proposed system based on the analytical/static approaches (e.g. heat loss models of heated objects) and applying the techniques of computational intelligence (e.g. artificial neural networks) creates a dynamic environment that can predict the amount of heat delivered not only on the basis of the energy requirements for the thermal balance of the heated objects and the current weather forecast, but the use of the data base and universal approximators in the field of computational intelligence on the behavior of objects in different operating conditions.

Abstract: This article describes the evaluation methodology of flexibility production in real conditions. Individual steps analyse the manufacturing plant, form transport matrixes of shipping time between workplaces with conveyor and carriage. The second part of article evaluates short – term flexibility with the change of batch production quantity and the type of transport. The target of this article is pointing out the possibilities of handling systems optimization which is based on flexibility production.