Temat: machine tool - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Innowacyjność polskich obrabiarek skrawających. Czynniki determinujące
Polish machine-tools innovativeness. Determining factors
Autorzy:: Matuszewski, M.
Styp-Rekowski, M.
Tematy:: machine tool
technical innovations
innovativeness; Pokaż więcej
Wydawca:: Wydawnictwo AWART
Powiązania:: https://bibliotekanauki.pl/articles/404437.pdf Link otwiera się w nowym oknie
Opis:: W artykule przedstawiono czynniki, które determinują wdrażanie innowacji w polskim przemyśle obrabiarkowym. Jako trzy najistotniejsze autorzy wymieniają: czynnik ludzki, efektywność transferu wiedzy oraz kwestie ekonomiczne. Niedostatki stwierdzone we wszystkich wymienionych sferach powodują, że innowacyjność polskich obrabiarek nie jest taka jakiej można oczekiwać, biorąc pod uwagę bogate tradycje w tym zakresie.
In the paper the factors that determine the implementation of innovations in the Polish machine tool industry were presented. As the three most important in authors mention there are: human factor, efficiency of knowledge transfer and economic aspects. Deficiencies found in all the above-mentioned areas make the innovativeness of Polish machine-tools not as expected, given the rich Polish traditions in this field.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Practical applicability of ident package to identification of parameters of dynamic models of machine tool supporting systems
Praktyczne możliwości wykorzystania pakietu IDENT do identyfikacji parametrów modeli dynamicznych układów nośnych obrabiarek
Autorzy:: Gutowski, P.
Berczyński, S.
Tematy:: identification
machine tool
dynamics
stiffness; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/281189.pdf Link otwiera się w nowym oknie
Opis:: In the paper a short description of the identification method of parameters of machine tool supporting system dynamic models, constructed according to the rigid finite element method convention is given. The identification is carried out on the basis of selected points of the experimentally determined amplitude-frequency characteristics of tested machine tool. It is possible to identify the parameters of spring-damping elements which model slideway joints, lead screws, turntables and rolling blocs as well as the parameters of the object foundation on springdamping vibration isolators. Principal mathematical relationships of the identification algorithm are given. An example of practical use of this method for identifying selected parameters of FWD-32J type milling machine model is presented and discussed.
W pracy przedstawiono krótki opis metody identyfikacji parametrów modeli dynamicznych układów nośnych obrabiarek budowanych w konwencji metody sztywnych elementów skończonych. Identyfikację prowadzi się na podstawie wybranych punktów z wyznaczonych doświadczalnie charakterystyk amplitudowo-częstotliwościowych badanej obrabiarki. Możliwe jest prowadzenie identyfikacji parametrów elementów sprężysto-tłumiących modelujących połączenia prowadnicowe, śruby pociągowe, obrotnice i belki toczne, a także parametrów elastycznego posadowienia obrabiarki na wibroizolatorach. Podano podstawowe zależności matematyczne algorytmu identyfikacji oraz podano i omówiono przykład praktycznego wykorzystania metody do identyfikacji wybranych parametrów modelu układu nośnego frezarki FWD-32J.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: A Comparative Analysis of the Impact of CNC Miller Programming on Machining Effects
Autorzy:: Kuczmaszewski, J.
Pieśko, P.
Zawada-Michałowska, M.
Tematy:: programming
CAM
CNC machine tool; Pokaż więcej
Wydawca:: STE GROUP
Powiązania:: https://bibliotekanauki.pl/articles/2064953.pdf Link otwiera się w nowym oknie
Opis:: This paper presents a comparison of the impact of the programming methods of a CNC miller on the machining effects. As a part of the study, the test samples were made of the EN AW-2024 aluminium alloy. The CNC machining programs compared were developed with two programming methods: by inputting the CNC machining program directly from the CNC miller's control panel (machine level programming) and in a CAM software environment (CAM programming). The machining effect indicators adopted included: machining time, surface quality, and dimensional deviation of specific geometrical features. A measurement of the machining times revealed than the CAM programming reduced the machining time up to 20% from the machining time of the machine level programming. A conclusion stands valid that CNC machining programs developed in the CAM software environment are more efficient than CNC programming directly with the CNC miller control panel, most likely due to the machining path optimisation in CAM. In addition, given the experimental test results, it was found that smaller machined errors were also obtained for CAM programming. To conclude, the comparative analysis revealed that CAM programming provided better machining results than the machine level programming.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Proposal of device for monitoring of educational machine tools
Autorzy:: Císar, M
Kuric, I.
Čuboňová, N.
Vlček, Š.
Tematy:: monitoring
prototype
machine tool
diagnostics; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/103244.pdf Link otwiera się w nowym oknie
Opis:: Maintaining machinery in conditions capable of production requires certain level of maintenance which should be planned in order to avoid unnecessary downtiqmes. Technical diagnostics and monitoring provides data necessary for effective targeting, planning, and optimizing maintenance actions. This article describes a proposal of a system designed for monitoring various parameters on educational machine tools of EMCO Concept series, which are widely used at schools and universities and therefore, relatively easily accessible for research without any issues regarding confidentiality, common in industrial applications. The article describes a situation for which the device was designed, measured parameters, sensors its implementation and testing.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Limiting Precision Distortions in Spindle Unit of HSC Machining Centre
Autorzy:: Jedrzejewski, J.
Kwasny, W.
Modrzycki, W.
Tematy:: HSC
machine tool
precision
distortion; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/971113.pdf Link otwiera się w nowym oknie
Opis:: The paper presents causes of excessive precision distortions, appearing in electrospindles of HSC machining centres. The influence of changing ambient temperature is shown, as well as the precision of its modelling. Phenomena, which appear in the electrospindle unit during large rotational speed changes, have been presented and the functioning of bearing loading sleeve has been shown, which has the task of compensating thermal expansions of a spindle. Conditions of proper functioning of the sleeve have been presented, which should assure minimal displacements of a spindle. Also, possibilities of increasing bearing life span have been pointed out.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Methods of machine tool error compensation
Autorzy:: Turek, P.
Jędrzejewski, J.
Modrzycki, W.
Tematy:: machine tool
errors compensation methods; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/99544.pdf Link otwiera się w nowym oknie
Opis:: The most important tendencies in the development of modern machine tools are pointed out, including the improvement of their design and development of error compensation methods. An overview of the most popular and useful error compensation methods for machine tools is presented. Based on examples, the effectiveness and limitations of each method are discussed. An integrated 5-axis machine tool behaviour model is presented, which assists in the elaboration of an error model required for the compensation purposes.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Lightweight machine enclosures for dynamic and efficient production processes
Autorzy:: Möhring, H.-Christian
Stehle, Thomas
Schneider, Matthias
Tematy:: machine tool
safety
acoustic emission; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/99419.pdf Link otwiera się w nowym oknie
Opis:: Usually machining centres for processing wood-based and composite materials have moving partial machine enclosures in the X-axis direction. Because the workpieces to be machined are often large (e.g. aircraft doors), these partial enclosures have prevailed on the market compared to voluminous complete enclosures. Owing to the general trend towards complete machining through process integration, an increasing number of additional units are integrated into machining centres in addition to the main spindle. This leads to an increase of the mass to be moved as well as a larger and thus heavier partial enclosure. This inevitable increase in mass leads to a deterioration of the dynamic properties of the machine. To counteract this increase in mass, the use of lightweight design materials for machine enclosures becomes in the focus of attention. The lightweight materials to be used must comply with the requirements of modern mechanical engineering and legislation: retention in the event of tool breakage, reduction in the noise exposure of the machine environment and cost-effective solutions compared to the materials used nowadays. The sheet steel used today as material for partial enclosures is therefore to be supplemented or replaced with suitable lightweight design materials. Different lightweight materials are qualified for suitability as machine enclosure. Apart from mass reduction, ecological as well as economic aspects of the used materials play an important role. For this purpose, the safety properties (impact resistance in case of tool breakage / collision) of these weight-reduced materials have to be determined. In addition, an improvement in the acoustic behaviour of the machine is achieved by the new lightweight materials since the machine enclosure shields the distinctive sound sources.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Increasing the elasticity of multitasking machining using tooling for tools and workpiece clamping in a CNC machine tool
Autorzy:: Mazurek, L.
Taranenko, V.
Świć, A.
Taranenko, G.
Tematy:: workpiece
tool
fastening
CNC machine tool
table; Pokaż więcej
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Powiązania:: https://bibliotekanauki.pl/articles/117657.pdf Link otwiera się w nowym oknie
Opis:: The article presents rules for designing a device for fastening tools and machined parts to a CNC machine tool. Suggested tooling was used on machine tools already working in machining industry. Those machine tools can be elements of Flexible Production Systems. Presented solutions facilitate the application of CNC machine tools in low-volume and piece production.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Recent advances in precision, sustainability and safety of machine tools
Autorzy:: Uhlmann, Eckart
Tematy:: machine tool
precision
safety
sustainability; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/24084721.pdf Link otwiera się w nowym oknie
Opis:: Machine tools are the main driver of economic, environmental and social sustainability in industrial production. The ongoing shift from mass production to highly individualized, small batch manufacturing requires machine tools to be more flexible to changing needs while maintaining at least the same level of productivity. However, flexibility and productivity are at odds with the necessity for resource and energy efficiency. At the same time, more sophisticated workpiece specifications are pushing the boundaries regarding precision and dynamics of machine tools. In such a high-performance context, machine safety plays a major role and is becoming increasingly challenging due to higher kinetic energies of moving components. This paper examines recent advances in machine tool precision, sustainability, and safety. Six comprehensive case studies are provided to illustrate how these improvements contribute to an increased productivity. Hardware and software solutions for pose-controlled robotic manufacturing and thermoelectrically tempered high-performance spindles will be presented. Modular machine tool frames based on building blocks and an adaptive cooling system with thermoelectric generators for linear direct drives demonstrate their major impact on resource and energy efficiency. Machine safety is addressed through an analysis of potential hazards as well as improved protective measures. Model-based predictions precisely identify critical process parameters that lead to unbalance-induced failure of slim tool extensions, while on the protection side, new statistical models are applied to assess the protective performance of safeguards much more accurately. The cutting-edge technologies for machine tools presented in this paper will help manufacturers to cope with current and future challenges in industrial production.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Study on reducing energy consumption in manufacturing systems
Autorzy:: Jędrzejewski, J.
Kwaśny, W.
Tematy:: machine tool
processes
energy consumption; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/99980.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the complexity and importance of energy saving in industry, manufacturing facilities, machine tools and machining processes. The increasing energy demand and the necessity of conscious energy use are highlighted. Problems relating to the reduction of energy consumption by machine tools and manufacturing facilities, the necessity of basing new energy-efficient designs on knowledge, the accurate modelling of power losses and the use of intelligent energy consumption control with special regard to the drives of controllable axes are discussed. of reducing energy consumption by machine tools and manufacturing processes is indicated.
Dostawca treści:: Biblioteka Nauki

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