Autor: Powałka, B - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of application of special casting compound on dynamic characteristics of the guideway system
Autorzy:: Powałka, B.
Okulik, T.
Powiązania:: https://bibliotekanauki.pl/articles/99487.pdf
Data publikacji:: 2010
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: EPY resin
dynamics
ball rail system
guideways
Opis:: The work presents a new technology for the assembly of ball guideway systems which involves the use of a thin layer of special casting compound (EPY resin) used mainly for stable seating of machinery, especially on steel or concrete foundations. The paper presents results of simulation investigations. Simulation model was built using results of static tests. The results of simulation dynamic tests in the form of frequency response functions are shown. Experimentally supported simulation research presented in the work indicates that the use of EPY resin between the guide rail and the bed of the machine tool positively influences the dynamics of the system. The comparison of the new solution with the one used so far was performed on the basis of a guideway combination consisting of a body and a milling table. The dynamics was compared with the use of a frequency response function obtained using an impulse test. The proposed solutions are characterized by higher dynamic stiffness, which may directly influence the precision of the machined surfaces.
Źródło:: Journal of Machine Engineering; 2010, 10, 2; 71-81
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Stability analysis in milling based on operational modal data
Autorzy:: Powałka, B.
Chodźko, M.
Jemielniak, K.
Powiązania:: https://bibliotekanauki.pl/articles/99831.pdf
Data publikacji:: 2011
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: milling
chatter
operational modal analysis
Opis:: Prediction of process stability in milling is usually based on experimental frequency response functions of machine tool and cutting force model. Alternatively, operational modal analysis may be applied for the prediction of a stability diagram. It does not require modal impact test but uses vibration signal acquired during actual cutting to identify modal parameters. Such an approach considers boundary conditions that may be different during cutting. On the other hand synthesis of frequency response function is not feasible due to the lack of scaled modal residues. Thus, in this paper modal mass obtained by means of impact test is used to calculate frequency response functions. Estimation of modal damping and natural frequency is carried out using only acceleration signals measured during flexible workpiece machining.
Źródło:: Journal of Machine Engineering; 2011, 11, 4; 70-77
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Illumination for chatter mark detection using machine vision
Autorzy:: Szydłowski, M.
Powałka, B.
Berczyński, S.
Powiązania:: https://bibliotekanauki.pl/articles/100021.pdf
Data publikacji:: 2014
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: inspection
chatter detection
image processing
wavelet transform
Opis:: Authors of this research present a new method for image acquisition using special illumination for milled surfaces. The presented method uses special light and camera setup to reveal chatter marks on processed surfaces. After the acquisition the images are digitally processed using a method based on Continuous Wavelet Transform. A milling experiment has been preformed for validation of the methods. The biggest advantage of this method is that it doesn't have to be manually set like other image processing methods used in chatter detection.
Źródło:: Journal of Machine Engineering; 2014, 14, 2; 38-46
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Chatter stability investigation in micro-milling
Autorzy:: Matuszak, M.
Powałka, B.
Kochmański, P.
Powiązania:: https://bibliotekanauki.pl/articles/99632.pdf
Data publikacji:: 2013
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: micromilling
impact test
vibration
Opis:: The paper presents investigation under chatter stability in micromilling process. To determine the impact of micromilling machine dynamic properties, impulse test of micromilling tool was carried out. Due to high participation of ploughing in micromilling process the regenerative effect in comparison to conventional milling can be reduced or lead to frictional vibration. Series of cutting tests for variable cutting speed, feed per tooth and cutting depth were performed to verify these assumptions. During the tests cutting forces and accelerations, both on machine spindle and workpiece were measured. Performed milling tests show that the vibration occurs at highest depth of cut and at lowest feed rate. This leads to the conclusion that reason of vibration could be friction between tool and workpiece.
Źródło:: Journal of Machine Engineering; 2013, 13, 2; 36-45
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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