PL
 |
EN
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Ograniczanie wyników
Czasopisma help
  1. 20 Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
  2. 5 Mechanik
  3. 4 Prace Naukowe Katedry Budowy Maszyn / Politechnika Śląska
  4. 4 Scientific Letters of Rzeszow University of Technology. Mechanics
  5. 4 Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
Więcej...
Lata help
  1. 2 2024
  2. 1 2023
  3. 1 2022
  4. 2 2021
  5. 2 2019
Więcej...
Autorzy help
  1. 9 Wilkowski J.
  2. 8 Czarniak P.
  3. 8 Gorski J.
  4. 7 Podziewski P.
  5. 6 Szymanowski K.
Więcej...
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 44

Liczba wyników na stronie
first rewind previous Strona / 3 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  machining process
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 3 next fast forward last
1
Content available Nanofluid assistance in machining processes – properties, mechanisms and applications: a review
100%
Grzesik W.
Journal of Machine Engineering
|
2021
|
tom Vol. 21, No. 2
75--90
EN
A special group of hybrid assisted processes termed media-assisted processes which apply liquid media with special additives in the form of nanoparticles supplied to the cutting zone is overviewed. Special attention is paid to minimum quantity lubrication (MQL) technique with the use of nanofluids. In this review paper some important thermal and tribological effects resulting from the applications of various nanoparticles are outlined and compared. The MQL-nano cutting fluid mechanisms (rolling and ploughing) are described. In particular, some important quantitative effects concerning thermal and tribological behaviour of the cutting process as well as surface quality are presented.
2
Content available Analysis and simulation of nonlinear self-excited vibrations in turning
100%
Zeleny J. , Repak T. , Fojtu P.
Journal of Machine Engineering
|
2008
|
tom Vol. 8, No. 4
68--79
EN
Commonly applied theories of self-excited vibrations in machine tools are prevailingly based on frequency domain analysis of linear models and are devoted in most cases only to evaluation of stability limits of strictly linear systems. In this way, the behaviour of more stable or more unstable systems cannot be studied and analyzed. Certain important nonlinear effects cannot be studied as well for limitations connected with classical representation of systems only in the frequency domain. Evaluation of stability by analysis of nonlinear systems in time domain has not been applied until now. The paper shows a new approach based on interpretation of the self-excited vibration systems as nonlinear servo-systems. With this approach, linear and nonlinear systems of any degree of stability can be studied by combination of frequency and time-domain methods. This can considerably contribute to better understanding of complex phenomena in various regimes and special situations.
3
Content available remote Dynamically stable milling tools with integrated cut splitting
88%
Emmer T. , Schmidt K. , Batt S. , Streubel A.
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
|
2002
|
tom z. 58 [193]
73-80
EN
The principle of the cut-splitting can guarantee an effective cutting even under the difficult conditions of stability. To divide the chip in two or more pieces, the geometric relations of the cutting area of every chip are changed. This change is caused by the cutting forces and therefore by the dynamic behaviors of the whole process. The advancement of the principle of cut-splitting obviously increases the dynamic behavior. In particular, under unstable conditions of machine processing in practice, these new milling tools outclass the ordinary milling heads because of their fewer vibrations and noise.
4
Content available Intelligent cyber-physical monitoring and control of I4.0 machining systems – an overview and future perspectives
88%
Hassan M. , Sadek A. , Attia M. H.
Journal of Machine Engineering
|
2022
|
tom Vol. 22, No. 1
5--24
EN
Rapid evolution in sensing, data analysis, and industrial internet of things technologies had enabled the manufacturing of advanced smart tooling. This has been fused with effective digital inter-connectivity and integrated process control intelligence to form the industry I4.0 platform. This keynote paper presents the recent advances in smart tooling and intelligent control techniques for machining processes. Self-powered wireless sensing nodes have been utilized for non-intrusive measurement of process-born phenomena near the cutting zone, as well as tool wear and tool failure, to increase confidence in the process and tool condition monitoring accuracy. Cyber-physical adaptive control approaches have been developed to optimize the cycle time and cost while eliminating machined part defects. Novel artificial intelligence AI-based signal processing and modeling approaches were developed to guarantee the generalization and practicality of these systems. The paper concludes with the outlook for future work needed for seamless implementation of these developments in industry.
5
Analyses of surface roughness in selected wood species after machining on a CNC woodworking centre
75%
Pinkowski G. , Szymanski W. , Nosowski T.
|
|
tom 79
6
Raw HDF machinability experimental test - quality of drilling process
75%
Podziewski P. , Gorski J. , Czarniak P. , Wilkowski J.
|
2013
|
tom 81
7
Content available remote Progress in modelling and simulation of the machining process - part II: Mesh-free modelling and simulation
75%
Grzesik W.
|
|
tom R. 97, nr 5-6
6--15
EN
In this paper some rules of mesh-free/meshless modelling and numerical simulations of fundamental physical phenomena associated with the machining process, including mechanisms of plastic deformation, chip formation and interfacial friction are overviewed. Some representative examples of the mesh-free modelling application to material removal processes at different scales, i.e.: machining processes, water jet-assisted processes, additive machining processes and simulation of micromachining processes using predominantly SPH (smoothed particle hydrodynamics) method are given.
PL
W artykule omówiono zasady bezsiatkowego modelowania i symulacji numerycznej podstawowych zjawisk fizycznych towarzyszących procesom obróbki, w tym mechanizmów odkształcania materiału, tworzenia wióra i tarcia. Podano przykłady zastosowania bezsiatkowego modelowania procesów obróbki ubytkowej, m.in.: obróbki skrawaniem, wysokociśnieniową strugą wody (WJM i AWJM) oraz obróbki i symulacji mikroobróbki z użyciem metody SPH (hydrodynamiki wygładzonych cząstek).
8
Content available remote Efektywność energetyczna procesu obróbki skrawaniem na przykładzie toczenia
75%
Terelak-Tymczyna A. , Miądlicki K. , Nowak M.
|
2016
|
tom R. 89, nr 10
1308--1309
PL
Efektywność energetyczna procesów produkcyjnych stała się w ostatnich latach jednym z priorytetowych działań organizacji. W referacie przedstawione zostały wyniki badań przeprowadzonych na tokarce w Instytucie Technologii Mechanicznej. Prezentowane wyniki przedstawiają rzeczywiste przebiegi procesu obróbki elementów produkowanych seryjnie.
EN
The energy efficiency of production processes has become in recent years one of the priority activities of the organization. The paper presents the results of studies conducted on a lathe at the Institute of Mechanical Technology. The results presented represent the actual waveforms process of machining of parts manufactured in series.
9
Analiza energochłonności procesu obróbki skrawaniem
75%
Nosol A.
|
|
tom z. 108
119--122
EN
The paper presents the information about the energy consumption in the machining process. It has been shown how looks the power consumption of the lathe, what factors impact on it. It was discussed the negative impact of reactive power in the electricity grid and the possibilities of its compensation. The analysis and comparison of the power consumption was made for a conventional and CNC lathe.
10
Content available remote Optimal tools setting of automatic multispindle lathes with CNC
75%
Marchuk V. , Szabajkowicz W.
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
|
2002
|
tom z. 58 [193]
247-251
EN
For execution of turning operations in requirements multi-product manufacture usage of multi-spindle turning automatic machines number controlled is expedient. The procedure of optimisation the technological solutions surveyed at definition structures of cluster adjustments turning automatic machines. The optimality of the factor multi-tools is considered from positions of reaching of an accuracy of job surfaces.
11
Content available remote Badania symulacyjne procesów obróbkowych w środowisku wirtualnym
75%
Iżykowski S. , Gąbka M. , Surmiński P.
|
2006
|
tom R. 48, nr 5-6
151-154
PL
Przedstawiono proces tworzenia wirtualnego środowiska wytwarzania w systemie NCSIMUL. Opisano metodykę postępowania prowadzącą do budowy wirtualnej obrabiarki, dla której przeprowadzono symulację obróbki wielogniazdowej formy obrotowej. Dokonanie optymalizacji tego procesu i analiz wymiarowych produktu w środowisku wirtualnym umożliwiło pozytywne wdrożenie jego obróbki na maszynie rzeczywistej.
EN
The paper introduces a process of creating a virtual environment of production in the NCSIMUL system. Described is a methodology leading to the creation of a virtual CVC machine tool, on which machining of a rotary, multi-cavity mould was simulated. Optimization of such process and dimensional analysis of the product in the virtual environment allowed for successful implementing the machining process on a real machine tool.
12
Content available Influence of sawing direction on edges quality in oriented wood-based materials
75%
Czarniak P. , Wilkowski J. , Gorski J.
|
|
tom 82
13
Content available Znachenie vibroakusticheskikh signalov takikh kak vibracija i shum v diagnostike iznosa instrumenta vo vremja sverlenija v drevesnostruzhechnojj laminirovannojj plite
75%
Jegorowa A. , Gorski J. , Morek R. , Podziewski P. , Szymanowski K. , Czarniak P.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2015
|
tom 92
14
Content available Modelling of the similar depth profiles of two different kinds of ions, implanted to WC-Co tools, used in wood-based material machining
75%
Barlak M. , Wilkowski J. , Werner Z.
|
|
tom 122
15
Content available Drilling accuracy of long elements from MDF on CNC machining centers
75%
Wilkowski J. , Boltralik K. , Borysiuk P. , Czarniak P. , Gorski J. , Podziewski P. , Rousek M. , Ruzinska E. , Szymanowski K.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2015
|
tom 90
16
Content available Tool life observed during milling as the indicator of MDF machinability
75%
Szymanowski K. , Gorski J. , Czarniak P. , Wilkowski J. , Podziewski P.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2014
|
tom 88
EN
Tool life observed during milling as the indicator of MDF machinability. The tool life in the wood industry is very different, depending on the cutting material and therefore tool life is one of the most important criteria for assessing the machinability. In the article this aspect of MDF machinability was tested and characterized. The results of experiments can be used in future for the comparing other materials to MDF in terms of machinability.
PL
Trwałość narzędzi tnących jako wskaźnik skrawalności MDF. Różnorodność stosowanych w przemyśle drzewnym materiałów obrabianych sprawia, że narzędzia mają różną trwałość i dlatego trwałość ta jest jednym z najważniejszych aspektów skrawalności. W artykule ten właśnie aspekt skrawalności MDF byl badany i charakteryzowany. Wyniki eksperymentów mogą być w przyszłości wykorzystywane do porównywania innych materiałów do MDF pod względem skrawalności.
17
Zastosowanie map zużycia do optymalizacji wiercenia stali austenitycznych
75%
Kostorz I.
Prace Naukowe Katedry Budowy Maszyn / Politechnika Śląska
|
1999
|
tom nr 2
123-136
PL
W artykule zaprezentowano analizę literaturową dotyczącą generowania map zużycia reprezentujących prędkość zużycia narzędzia w dwuwymiarowej przestrzeni definiowanej przez warunki skrawania metali. Celem tworzenia map zużycia jest optymalizacja procesu skrawania metodą selekcji najbardziej odpowiednich warunków skrawania, polegająca na badaniu tendencji zużywania się narzędzia.
EN
The paper presents the literature analysis approach to generate wear maps representing the rates of tool wear in a two - dimensional space defined by the machining condition in metal cutting. This approach aims to establish an optimal machining process by selecting the most suitable machining conditions and examine the trends of tool wear.
18
Content available Influence of parameters of milling process on the energy consumption of the machine tool
63%
Borkowski W. , Skoczyński W. , Piórkowski P. , Jankowski T. , Roszkowski A. , Foremniak M.
Advances in Science and Technology. Research Journal
|
2018
|
tom Vol. 12, no 3
24--31
EN
The article discusses the importance of energy consumption for the modern machine tool. The research was carried out to show the influence of various cutting factors and parameters on the power consumption values of the machine tool. A special algorithm was developed to determine the actual energy consumption of the machine tool during the cutting process. The results of the study were compared with the algorithms of tool companies to determine the machine’s power demand. The possibilities of using research conclusions to develop a more accurate method for assessing the energy demand of a machine tool in the cutting process were indicated.
19
Content available remote Symulacja procesu obróbki w oparciu o utworzony model obrabiarki w programie Unigraphics
63%
Monica Z. , Ociepka P. , Herbuś K.
|
2008
|
tom R. 49/2, nr 4-5
110-113
PL
W artykule opisano zastosowanie programu Unigraphics NX4 do tworzenia programów NC. Przedstawiono proces modelowania obrabiarki, proces tworzenia postprocesora i proces generowania ścieżek narzędzia do obróbki ubytkowej części maszyn Zaprezentowano praktyczny przykład obróbki elementu.
EN
This paper presents the application of the Unigraphics NX4 system for creating NC programs. It has been presented the process of machine tool modeling, post-processor creating and a tool-paths generating for machining machine parts. The practical example of an element machining is also included.
20
Content available Testing the tightness of a square joint between oak wood elements
63%
Dobrowolska E. , Karwat Z. , Kupiec D.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2019
|
tom 107
first rewind previous Strona / 3 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.