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1
Content available Comparison of various tool wear prediction methods during end milling of metal matrix composite
Wiciak M., Twardowski P., Wojciechowski S.
Archives of Mechanical Technology and Materials
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2018
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Vol. 38
1--7
EN
In this paper, the problem of tool wear prediction during milling of hard-to-cut metal matrix composite Duralcan™ was presented. The conducted research involved the measurements of acceleration of vibrations during milling with constant cutting conditions, and evaluation of the flank wear. Subsequently, the analysis of vibrations in time and frequency domain, as well as the correlation of the obtained measures with the tool wear values were conducted. The validation of tool wear diagnosis in relation to selected diagnostic measures was carried out with the use of one variable and two variables regression models, as well as with the application of artificial neural networks (ANN). The comparative analysis of the obtained results enabled the selection of the most effective tool wear prediction method.
2
Content available Wear analysis of cemented carbide during turning of cast iron considering economical machining speed
Znojkiewicz N., Korzeniewski D., Wiciak M.
Archives of Mechanical Technology and Materials
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2017
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Vol. 37
27--34
EN
The purpose of this paper is to find economical machining speed during turning of grooves for piston rings with various feeds. In the first part of the paper, literature analysis concerning durability of cutting tools is presented. Next, the wear of cemented carbide cutting tools during turning of cast iron is researched. The research has been done for seven cutting tools. During conducted turning trials, angular speed has been altered from n=530rev/min to n=710rev/min and feeds from f=0.007mm/rev to f=0.105mm/rev. On the basis of Taylor’s equation, which relates cutting speed to tool life, the economical cutting speed is established with the application of two various methods.
3
Content available remote Distribution-valued functions
Wiciak M.
Czasopismo Techniczne. Nauki Podstawowe
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2013
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R. 110, z. 1-NP
41--54
EN
We study continuity and differentiability of a distribution-valued function. It is understood in a strong sense due to inductive limit topology.
PL
W artykule przedstawiono zagadnienie ciągłości i różniczkowalności funkcji o wartościach dystrybucyjnych. Pojęcia te są rozumiane w sensie silnym dzięki zastosowaniu topologii induktywnej.
4
Content available Differential equation of transverse vibrations of a beam with a local stroke change of stiffness
Kasprzyk S., Wiciak M.
Opuscula Mathematica
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2007
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Vol. 27, no. 2
245-252
EN
The aim of this paper is to derive a differential equation of transverse vibrations of a beam with a local, stroke change of stiffness, and to solve it. The presented method is based on the theory of distributions.
5
Content available Distributional solution of a wave equation
Wiciak M.
Hydroacoustics
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2001
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Vol. 4
249--252
EN
The aim of this paper is to present the method of deriving the formula for a solution of the wave equation. We deal with the case when external forces are distribution-valued functions, which is e.g. the case of a quasi - point source. Also the solution is understood as a distribution-valued function.
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