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Application of Mineral Casting for Machine Tools Beds.
(Lodz University of Technology. Faculty of Mechanical Engineering. Department Division of Dynamics., 2013) Kępczak, Norbert; Pawłowski, Witold
The article provides state of the art and the latest development trends in the manufacturing of machine tool beds. The emphasis is placed on modern materials whose mechanical and dynamical properties may prove to be a breakthrough in the field of machine tool design.
Badania hybrydowego korpusu obrabiarki
(Wydawnictwo Politechnika Łódzka, 2018) Kępczak, Norbert; Urbaniak, Mirosław; Skoczyński, Wacław
Mechanical Properties of the Mineral Cast Material at the Macro and Micro Level.
(Lodz University of Technology. Faculty of Mechanical Engineering. Department Division of Dynamics., 2016) Kępczak, Norbert; Pawłowski, Witold; Klich, Marek; Kaczmarek, Łukasz
The paper presents the results of experimental examination of the mechanical properties at micro and macro scale of the mineral cast composites. Studies have been conducted to verify the literature data about the value of tensile strength, compressive strength and Young’s modulus. Additionally as a part of this research Poisson’s ratio was determined, which has not been encountered in the current literature as deeply as in this work. In the next step, a scanning electron microscopy (SEM) studies have been carried out to analyze fractures of the samples after tensile and compression tests. These results were correlated with mechanical properties such as tensile strength and compressive strength, respectively. During fracture investigations, the contact interface between concrete filler and polymer was studied. As a result of this research the mechanism of deformation was formulated.
Modal Identification of Dynamic Properties of the Cylindrical Grinder.
(Lodz University of Technology. Faculty of Mechanical Engineering. Department Division of Dynamics., 2017) Pawłowski, Witold; Kępczak, Norbert
In the paper the method of model identification of the cylindrical grinder dynamic properties by means of experimental modal test was described. The method application, hardware solution as well as the procedure of carrying out the identification modal test of the cylindrical grinder was presented. The experiment was performed in order to acquire the frequency response function (FRF) of the cylindrical grinder. Having obtained the experimental FRF, the mathematical model of the response function was created. That mathematical model of the machine tool dynamic behavior can be applied in grinder and grinding holistic model. The conclusions regarding the application aspects of experimental modal analysis in order to identify dynamic properties of the machine tool were drawn.
Wpływ ustalenia i mocowania korpusów przekładni technologicznie podobnych na kształt otworów pod łożyska.
(Stowarzyszenie Inżynierów i Techników Mechaników Polskich, 2014) Wójcik, Ryszard; Kępczak, Norbert