Autor: Wit. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Investigation of notch wear mechanisms in the machining of nickel-based Inconel 718 alloy
Autorzy:: Grzesik, Wit
Powiązania:: https://bibliotekanauki.pl/articles/1428916.pdf
Data publikacji:: 2021
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: tool wear
aerospace alloy
oxidation mechanism
diffusion couple method
Opis:: This paper highlights tool wear mechanisms in the machining of heat resistance alloys including nickel-based Inconel 718 alloy which is one of the most popular material in the aircraft industry. Special attention was paid to the notch wear which develops on the flank face due to high temperature oxidation of the cutting tool material at temperature of about 800°C. The experimental procedure includes the diffusion couple methods and tool wear tests which assess the degradation of the deposited coating. The obtained results were supported by SEM images of the flank face periphery and EDS analysis performed in the regions of intensive oxidation. Some conclusions and ongoing research on the investigation of the oxidation phenomenon of cutting tool materials are outlined.
Źródło:: Journal of Machine Engineering; 2021, 21, 1; 56-66
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Modelling of heat generation and transfer in metal cutting: a short review
Autorzy:: Grzesik, Wit
Powiązania:: https://bibliotekanauki.pl/articles/99786.pdf
Data publikacji:: 2020
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: metal cutting
heat
modelling
Opis:: This paper overviews thermal fundamentals in metal cutting process for the determination of the amount of heat in the cutting zone which represents the interfaces between the cutting tool, the chip and the workpiece materials. Different measuring and predicting techniques of the tool-chip contact temperature and corresponding heat flux based on the estimated heat partition are outlined. The main focus was on the differently coated cutting tools and their role in controlling thermal behaviour of the cutting process. The computed algorithms for analytical and numerical methods as well as their main advantages and disadvantages, and practical applications in machining are overviewed. A number of practical solutions obtained in the Department of Manufacturing Engineering, TU of Opole are presented.
Źródło:: Journal of Machine Engineering; 2020, 20, 1; 24-33
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Nanofluid assistance in machining processes – properties, mechanisms and applications: a review
Autorzy:: Grzesik, Wit
Powiązania:: https://bibliotekanauki.pl/articles/1429063.pdf
Data publikacji:: 2021
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: nanofluid
nanoparticle
machining process
minimum quantity lubrication
Opis:: 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.
Źródło:: Journal of Machine Engineering; 2021, 21, 2; 75-90
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of different machining processes on fatigue life performance of engineered surfaces: a short review
Autorzy:: Grzesik, Wit
Powiązania:: https://bibliotekanauki.pl/articles/2086274.pdf
Data publikacji:: 2022
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: engineered part
surface roughness
stress concentration
fatigue life
Opis:: In this paper fundamental information on the influence of the real machined surfaces generated by different machining processes on the fatigue life of machine parts are presented. In the first part the various approaches for the assessment of the stress concentration factor and the correction of a fatigue life limit are discussed. In the second part the results of standard fatigue tests are compared with computed data and predictions using FEM based simulations. The effect of surface discontinues (valleys) in the real surface profiles is related to engineered parts made of different materials including steels, aluminium alloys, aerospace alloys and composites.
Źródło:: Journal of Machine Engineering; 2022, 22, 2; 18--30
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 tribo-testers for predicting metal cutting friction
Autorzy:: Grzesik, Wit
Rech, Joel
Powiązania:: https://bibliotekanauki.pl/articles/99593.pdf
Data publikacji:: 2019
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: metal cutting
friction
tribometer
Opis:: This paper overviews some frequently used apparatus for determination of friction between the elements of tribo-pairs which represent the cutting tool and the workpiece materials. The three methods which utilize different measuring techniques are outlined and some construction details of tribotesters are presented. The main advantages and disadvantages of the closed and open tribosystems along with their practical applications in machining are highlighted.
Źródło:: Journal of Machine Engineering; 2019, 19, 1; 62-70
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: New trends in hybrid finishing processes of metallic additively fabricated parts – a short review
Autorzy:: Rech, Joel
Grzesik, Wit
Powiązania:: https://bibliotekanauki.pl/articles/2200261.pdf
Data publikacji:: 2023
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: additive machining
conventional finishing
hybrid finishing
surface quality
Opis:: This comprehensive survey highlights some important finishing processes used in fabricating additively manufactured parts, mainly using SLM (Selective Laser Melting). In practice, there are applied hybrid processes which integrate additive and subtractive componential processes (AM+SM type) or additional finishing processes, mainly based on the electrochemical polishing such as ECP (Electrochemical Cavitation Polishing) and PEMEC (Electrochemical-Mechanical Polishing) ones. On the other hand, AFM (Abrasive Flow Machining) is predominantly recommended for conformal cooling (CC) channels. Some conclusions and future trends in the implementation of special hybrid finishing processes are outlined.
Źródło:: Journal of Machine Engineering; 2023, 23, 1; 36--46
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Energy-based characterization of precision hard machining using partially worn CBN cutting tools
Autorzy:: Grzesik, Wit
Denkena, Berend
Zak, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/100133.pdf
Data publikacji:: 2019
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: hard machining
CBN tool
tool wear
specific energy
Opis:: This paper highlights the performance of precision hard turning with CBN cutting tools from energy point-of-view with additional tool wear effect. For this purpose several wear tests were performed during which the tool nose wear VB_C and the corresponding changes of component forces F_c, F_f and F_p were continuously measured. Based on the measured forces and geometrical characteristic of the uncut layer, specific cutting and ploughing energy were determined for several combinations of cutting parameters. Consequently, changes of energy consumption resulting from tool wear evolution for variable feed rate, depth of cut and tool nose radius were presented.
Źródło:: Journal of Machine Engineering; 2019, 19, 2; 54-62
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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