Wyniki wyszukiwania - BazTech

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Research on the economic efficiency for technological equipment extending of the kinematic chains on the numerically controlled machines

Zdziarska Roksana, Biniek Agata, Grochała Daniel, Pajor Mirosław

Mechanik

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2019

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R. 92, nr 10

624--626

EN

The article describes the selection of machining holders included in the so called special machining fixture-tools. The equipment presented in the work is readily used by technologists as a solution extending the kinematic chain of the machine tool. It enables multi-axis machining (from many sides) using one item clamping. This paper presents the calculation of productivity and its growth through the use of special equipment. The research was carried out for medium-volume production, which is quite a difficult area in the design of technologies and the study of production costs. In the technical development of tooling and modeling of its usage costs, it was assumed to maintain the required level of dimensional and shape accuracy with a simultaneous significant reduction of operating costs. As part of the work, a model was also developed for determining the break-even point of investment in special machining tools that are used on triaxial milling machining centers.

PL

W artykule opisano sposób doboru uchwytów obróbkowych, wchodzących w skład tzw. specjalnych przyrządów obróbkowych. Zaprezentowane oprzyrządowanie jest chętnie wykorzystywane przez technologów jako rozwiązanie przedłużające łańcuch kinematyczny obrabiarki. Umożliwia ono prowadzenie obróbki wieloosiowej (z wielu stron) w jednym zamocowaniu przedmiotu. Omówiono metodykę obliczeń produktywności oraz jej wzrostu dzięki zastosowaniu specjalnego oprzyrządowania. Badania prowadzono dla produkcji średnioseryjnej, która jest dosyć trudnym obszarem w projektowaniu technologii oraz badaniu kosztów produkcji. W opracowaniu technicznym oprzyrządowania i modelowaniu kosztów jego użycia założono utrzymanie wymaganego poziomu dokładności wymiarowo-kształtowej z jednoczesną istotną redukcją kosztów operacyjnych. W ramach zrealizowanej pracy opracowano również model do określania progu rentowności inwestycji w specjalne przyrządy obróbkowe, które są stosowane na trójosiowych frezarskich centrach obróbkowych.

2

Sales Forecasting and Coal Mining Planning in the Context of Hard Coal Production Strategies

Rybak A., Manowska A.

Multidisciplinary Aspects of Production Engineering

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2018

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Vol. 1, Iss. 1

483--489

EN

Polish energy security is based mainly on a coal. Such dependency will be still maintained for several years. It is therefore necessary to improve the economic situation of polish mining companies. The mining companies in Poland are operating under tremendous uncertainty of turbulent environment. The article presents used by the authors methods to facilitate the creation and selection of optimal production strategy. These are scenario planning, forecasting and linear programming, which allow the simulation of company operations in the future. The authors suggest the most successful and optimal forecasting models for the Polish mining industry, as well as factors affecting the demand for hard coal in Poland. The manuscript presents also possible to apply coal production strategies and the method of evaluation and selection of optimal strategy in the difficult conditions of Polish mining companies environment. This makes it possible to take a decision burdened with minor errors and less risk.

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Selection of propulsion unit for a new class of transport hovercraft as a compromise between technical performance and purchase and exploitation costs

Szafran K., Pągowski Z.

Journal of KONES

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2016

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Vol. 23, No. 3

519--524

EN

In this paper, the authors presented some technical and economic relations to which a team designing a new means of transport should pay attention. In the first chapter briefly describes the hovercraft designed and built at the Institute of Aviation, as well as showing the certification documents obtained in the process of certification by the Polish Register of Shipping and Inland Navigation Office. The second chapter shows some parts of the production process. In the third chapter shows the drive unit and the characteristics of the selected motor. Problems of selecting a drive unit for a newly designed hovercraft aimed at transporting people and goods were described. The choice of propulsion engine, its quality and the kind of fuel affect the cost of purchase as well as the time and exploitation costs. A user planning a transport network pays particular attention to minimizing operating costs and the consequent reliability and safety. The authors presented regulations and standards, which need to be met by the transport unit designed for use in the public area. Attention was also paid to ecology, noise and pollution. An algorithm, which takes into account the rules of conduct, requirements of the ordering party and conditions of the manufacturer, was proposed. In conclusion, the generalized technical and economic guidelines are proposed which, in the authors’ opinion, may aid the development of a conceptual design of new modes of transport – not only the hovercraft.

4

Kierunki rozwoju rodzinnych gospodarstw rolnych

Szulc R.

Problemy Inżynierii Rolniczej

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2010

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R. 18, nr 1

19-27

PL

W pracy zaprezentowano metodę oraz wstępne wyniki badań rodzinnych gospodarstw rolnych, mających na celu wykazanie ich kondycji ekonomicznej, stanu technicznego sprzętu rolniczego, struktury zasiewów i wielkości stad oraz zmian w nich następujących. W porównaniu z latami ubiegłymi zaobserwowano zmiany w zakresie struktury upraw oraz obniżenie średniego wieku maszyn i zwiększenie liczby ciągników rolniczych.

EN

Paper presented the method and preliminary results of the survey carried out in three selected family farms. The study aimed at revealing economic conditions of the farms, technical condition of the farm equipment, cropping structure, the livestock density and the changes following among them. In comparison to the previous years some changes in the cropping structure were observed; the average age of farm machines was reduced at increasing number of agricultural tractors.