Autor: Kwasny, W. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Structure, physical properties and fractal character of surface topography of CVD coatings
Autorzy:: Kwaśny, W.
Powiązania:: https://bibliotekanauki.pl/articles/100107.pdf
Data publikacji:: 2011
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: CVD coatings
fractal geometry
multifractal geometry
X-ray analysis
Opis:: The aim of the presented study is to establish a methodology elaboration, giving a possibility to predict properties of coatings reached in CVD process on tool materials, based on fractal quantities describing their surface. Coatings' topography and its structure which has an impact on a shape of analysed objects' surface were characterised in a comprehensive way. Influence of a type of process and conditions of deposition over structure and shape of topography as well as mechanical and operational properties of the acquired coatings were determined.
Źródło:: Journal of Machine Engineering; 2011, 11, No. 1-2; 134-151
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Discussion of Machine Tool Intelligence, Based on Selected Concepts and Research
Autorzy:: Jędrzejewski, J.
Kwaśny, W.
Powiązania:: https://bibliotekanauki.pl/articles/99824.pdf
Data publikacji:: 2015
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
intelligence
learning
intelligent avoiding
collisions
trajectories
real time
Opis:: This paper discusses the need to create intelligent machine tools, the expected properties of such machine tools and the benefits they will bring to business and the development of manufacturing. The basis for machine tool intelligence, and the evolution of machine tools towards the development of their intelligent functions, with a special emphasis on control, digitization and virtualization systems, the role of the STP-NC standard, and the prediction of machine tool operating properties, are presented. The arising concepts of the development of intelligent machine tool functions, which take into account the monitoring and planning of a collisionless tool path, are discussed. The approach to achieving real time and the intelligent machine tool is described for copy milling. Also the directions of implementing intelligent functions by machine tool manufacturers are presented using the MAZAK Corporation as an example.
Źródło:: Journal of Machine Engineering; 2015, 15, 4; 5-26
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Knowledge base and assumptions for holistic modelling aimed at reducing axial errors of complex machine tools
Autorzy:: Jędrzejewski, J.
Kwaśny, W.
Powiązania:: https://bibliotekanauki.pl/articles/99902.pdf
Data publikacji:: 2013
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: holistic model
machine tool
power losses
error
Opis:: The paper presents the idea and need for the holistic modelling of machine tools. The complexity of such modelling is illustrated for a 5-axis machining centre. The need to model errors in the controllable axes of machine tools with rotational and linear motion drives is indicated. The physical dependences having a bearing on the state of deformations produced by temperature and dynamic forces, as well as the assumptions and computational modelsof shift generation in the high-speed bearing sets of spindles, and models of the behaviour of the ball screw are presented. Moreover, the results of experimental studies of the thermal behaviour of linear motor sets and guideways with rolling blocks are reported.
Źródło:: Journal of Machine Engineering; 2013, 13, 2; 7-25
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Development of Machine Tool Operational Properties
Autorzy:: Jędrzejewski, J.
Kwaśny, W.
Powiązania:: https://bibliotekanauki.pl/articles/99436.pdf
Data publikacji:: 2015
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
intelligence
accuracy
holistic modelling
simulation
thermal properties
Opis:: This paper presents the main directions in the development of machine tools and the practical implementations of new technologies by machine tool producers, aimed at meeting the business requirements. The possibilities of applying intelligent functions in high-performance machine tools and the trends in the development of intelligent machine tools are discussed. The vital importance of the holistic modelling and numerical simulation of the operational properties of machine tools at all the stages of their creation and the necessity of integrating the machine tool with the control system and the process during simulation and virtualization are highlighted.
Źródło:: Journal of Machine Engineering; 2015, 15, 1; 5-24
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Development of High Performance Machine Tools
Autorzy:: Jędrzejewski, J.
Kwaśny, W.
Powiązania:: https://bibliotekanauki.pl/articles/971145.pdf
Data publikacji:: 2009
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
development
precision
performance
intelligence
Opis:: This paper presents a general characteristic of modern cutting machine tools and their role in achieving high machining performance. The determinants of machine tool development, stemming from the constant development of products and their complexity and from market demands, are discussed in detail. Special attention is devoted to the improvement of the machine tool structure and its variations created in response to the continuous and flexible increase in machining efficiency. The importance of developing multitask, hybrid and reconfigurable structures is discussed. The essence of the development of multi-spindle units as the modules having a decisive influence on machining performance, precision and costs is described. Moreover, trends in the development of feed units and distance measuring systems are presented.
Źródło:: Journal of Machine Engineering; 2009, 9, 2; 5-31
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Study on reducing energy consumption in manufacturing systems
Autorzy:: Jędrzejewski, J.
Kwaśny, W.
Powiązania:: https://bibliotekanauki.pl/articles/99980.pdf
Data publikacji:: 2011
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
processes
energy consumption
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.
Źródło:: Journal of Machine Engineering; 2011, 11, 3; 7-20
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Limiting Precision Distortions in Spindle Unit of HSC Machining Centre
Autorzy:: Jedrzejewski, J.
Kwasny, W.
Modrzycki, W.
Powiązania:: https://bibliotekanauki.pl/articles/971113.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: HSC
machine tool
precision
distortion
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.
Źródło:: Journal of Machine Engineering; 2008, 8, 1; 44-53
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Survey of machine tool error measuring methods
Autorzy:: Kwaśny, W.
Turek, P.
Jędrzejewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/100074.pdf
Data publikacji:: 2011
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
volumetric error
identification
method
Opis:: This paper presents the factors and needs which make it necessary to increase the accuracy of machine tools. Types of machine tool errors, their causes and ways of identifying, measuring, reducing and compensating them are described. The most effective methods of identifying machine tool errors are discussed and classified. The measuring methods and tools are compared with regard to their range of application, time consumption, cost, market availability and main limitations.
Źródło:: Journal of Machine Engineering; 2011, 11, 4; 7-38
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Mechatronic approach to the development of an intelligent fixturing device test-bed
Autorzy:: Bukowski, A.
Kwasny, W.
Jedrzejewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/1429310.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: mechatronic approach
active fixturing system
intelligent controller
Opis:: In order to improve the process of designing mechatronic devices, an approach, based on a mechatronic model, is proposed. The structure of such model is presented, consisting of partial models of single elements in a system. Methods of creating these models and integrating them into one mechatronic model are discussed. In order to illustrate the approach, a case study is shown, consisting of a mechatronic alignment and fixing device for high-precision machine tools. A test bed of such device is under construction, which will allow experimental verifying partial models of components, as well as the entire system's mechatronic model. An extended set of monitoring sensors will provide accurate system behaviour data useful for such process.
Źródło:: Journal of Machine Engineering; 2008, 8, 3; 66-76
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Zaawansowane metody identyfikacji błędów obrabiarek
Advanced methods for the identification of machine tool errors
Autorzy:: Turek, P.
Kwaśny, W.
Jędrzejewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/269775.pdf
Data publikacji:: 2010
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: obrabiarka
błąd przestrzenny
identyfikacja
metoda
machine tool
spatial error
identification
method
Opis:: Przedstawiono ogólne uwarunkowania i potrzeby zwiększania dokładności obrabiarek. Opisano rodzaje błędów obrabiarek, ich przyczyny i sposoby zmniejszania oraz kompensacji. Szczegółowo omówiono obecnie najbardziej użyteczne metody identyfikacji błędów, zwłaszcza geometrycznych. Dokonano klasyfikacji oraz porównania metod i narzędzi pomiarowych z uwzględnieniem ich ogólności, czasochłonności, kosztu, dostępności na rynku i głównych ograniczeń.
This paper shows the overall conditions and needs to increase the accuracy of machine tools. Types of machine tool errors, their causes, as well as ways to reduce and compensate them are presented. The most useful methods of identifying particular geometric errors are discussed in detail. The classification of methods and tools of measurement in terms of their generality, measuring time, cost, availability and main constraints are presented.
Źródło:: Inżynieria Maszyn; 2010, R. 15, z. 1/2; 7-37
1426-708X
Pojawia się w:: Inżynieria Maszyn
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Process - machine tool thermal interaction
Autorzy:: Jedrzejewski, J.
Grzesik, W.
Kwasny, W.
Modrzycki, W.
Powiązania:: https://bibliotekanauki.pl/articles/1429322.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
cutting process device
part
interaction
Opis:: Hereby paper shows the structure of mutually connected thermal interactions in a machine tool, a tool and a workpiece, which finally leave their traces on a machined workpiece in form of machining errors. Thermal interactions of a machine tool and the environment on own and workpiece errors were discussed. Thermal interaction cases were considered, connected with the varying environment and the main drive operation, as well as total influence of the varying environment, main drive and two drives of controllable axes. The interactions of the cutting process itself were discussed, assuming three basic mechanisms: thermal, physically-mechanical and tribological. On the example of turning it was proven that the character of changes in total influences between the tool and workpiece has the shape of a temperature curve.
Źródło:: Journal of Machine Engineering; 2008, 8, 3; 91-106
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Computer Simulation of the Relationship between Selected Properties of PVD Coatings
Autorzy:: Śliwa, A.
Kwaśny, W.
Sitek, W.
Bonek, M.
Powiązania:: https://bibliotekanauki.pl/articles/351597.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: numerical techniques
stresses
microhardness
computer simulation
finite element method
Opis:: The possibility to apply the Finite Element Method to calculate internal stresses which occur in Ti+TiN, Ti+Ti(C_xN_1-x) and Ti+TiC coatings obtained in the magnetron PVD process on the sintered high-speed steel of the PM HS6-5-3-8 type. For the purpose of computer simulation of internal stresses in coatings with the use of MES, the correct model of analyzed specimens was worked out and then it was experimentally verified by comparison of calculation results with the results of computer simulation. Accurate analysis of correlations indicated especially strong dependence between internal stresses and microhardness and between microhardness and erosion resistance what created conditions for establishing the dependence between internal stresses obtained in the result of computer simulation and erosion resistance as basic functional quality of coating. It has essential practical meaning because it allows to estimate predictable erosion resistance of coating exclusively on the base of the results of computer simulation for used parameters in the process of coating manufacturing.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2A; 481-484
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Precise model of HSC Machining Centre for aerospace parts machining
Autorzy:: Jedrzejewski, J.
Kwasny, W.
Kowal, Z.
Modrzycki, W.
Powiązania:: https://bibliotekanauki.pl/articles/1429344.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machining centre
model
aerospace
precision
Opis:: This article shows the aspects of precise modelling of precise High-speed Machining Centres for High-Speed Cutting (HSC) of parts used in the aerospace industry. The main focus was made on the thermal errors having a dominant influence on the precision of machining. Main assumptions for a hybrid thermal model of a centre thermal behaviour have been stated, taking into account the characteristics of heat sources. On the example of a 3-axis machining centre, measured runs of heating up and heat displacements have been shown, compared to these determined with the use of simulations of a behaviour in assumed working conditions. A special attention was drawn to the phenomena taking place in motorspindles, as well as to the displacements of a spindle face during high rotational speeds of spindles and step changes of rotational speeds. The significance and influence of the bearing preload and centrifugal forces on the spindle axial displacements was shown, which is decisive on the precision of part machining. Additionally, it was shown that the important component of a machining error is an error of spindle position identification by means of a linear encoder, resulting from the thermal deformation of a centre body, to which a quartz linear encoder is fixed.
Źródło:: Journal of Machine Engineering; 2008, 8, 3; 29-41
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Precise modelling of machine tool drives with ball screw thermal behavior
Autorzy:: Winiarski, Z.
Kowal, Z.
Jędrzejewski, J.
Kwaśny, W.
Powiązania:: https://bibliotekanauki.pl/articles/100072.pdf
Data publikacji:: 2017
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
feed drive
ball screw
moving heat sources
numerical simulation
Opis:: This paper briefly describes the current requirements which machine tool ball screws must meet and indicates the need for the modelling and numerical simulation of the latter. The structure of a holistic ball screw model and ways of modelling the properties of the ball screw in a turning centre, including the moving heat sources on the guides and in the screw-nut joint, are presented. The results of computing the heating up and displacements of a preloaded screw and the screw without preload are reported. The modelled changes in motion resistance and in displacements are shown to be in agreement with the results of measuring the current drawn by the drive’s motor. It is also shown that the models represent well the real physical phenomena occurring in the ball screw during the execution of repeatable work cycles by the drive.
Źródło:: Journal of Machine Engineering; 2017, 17, 1; 31-45
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Development of the modelling and numerical simulation of the thermal properties of machine tools
Autorzy:: Jędrzejewski, J.
Kwaśny, W.
Kowal, Z.
Winiarski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/99438.pdf
Data publikacji:: 2014
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
modelling
numerical analysis
thermal properties
Opis:: This paper highlights the need for the holistic modelling of the thermal properties of machine tools to provide a good basis for the effective aiding of machine tool design and optimization. A brief history of this modelling and the idea of accurate modelling and its experimental verification are presented. Examples of the holistic modelling of drive units both isolated from the machine tool and interconnected with its structure are provided.
Źródło:: Journal of Machine Engineering; 2014, 14, 3; 5-20
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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