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Evaluation of the Optimum Machining Stability of a Milling Tool with Different Flutes and Overhangs

Lin Yung-Chih, Wu Kung-Da, Shih Wei-Cheng, Hung Jui-Pin

Advances in Science and Technology. Research Journal

2019

Vol. 13, no 2

56--64

In machining practice, the selection of the tooling condition of the cutters is an important task for milling operation with better surface quality and material remove rates. This study was therefore aimed at evaluating the influence of the tooling condition, such as the flutes and overhang length, on the machining efficiency of a milling machine by using the machining stability analysis method. Essentially, the machining stability was calculated based on the measured frequency response functions of the milling cutter, while it was also affected by the changing milling tooling path. Therefore, the machining stabilities in different feeding directions, referred to as polar stability boundary, were evaluated to show the strength and weakness of a specific cutter in contouring machining. The current results show that the overhang length greatly affects the dynamic characteristics and the limited cutting depths of the milling cutter. The stability boundaries of the machining conditions can be enhanced by appropriately adjusting the overhang of the milling cutter. Besides, the 2-flute cutter shows a larger cutting depth for surface contouring as compared to the 4-flute cutter, which is expected to increase the material remove rate under stable machining. As a whole, this study provides valuable references for enhancing the machining efficiency through the use of different tooling conditions.

Estimation of topography of cutting surface of grinding wheels in face grinding of small ceramic elements with use of AE signal.

Kacalak W., Bernat A.

Advances in Manufacturing Science and Technology

2004

Vol. 28, nr 2

17-27

In this article a method for interpretation of measurement data has been presented. The data obtained in a system, which measures signals of more than one quantity have been used in acoustic diagnosis of condition of cutting surface of grinding wheel. The method has been used in face grinding of small ceramic elements. Moreover, an influence system has been proposed. It provides estimation of grinding process parameters, based on measurements with sensors of distinct aims and of different mounting techniques in grinding machine.

W pracy zaproponowano pewną metodę interpretacji danych pomiarowych. Dane uzyskiwane w układzie, który mierzy sygnały więcej niż jednej wielkości, zostały wykorzystane w akustycznej diagnostyce stanu powierzchni czynnej ściernicy. Metodę tę wykorzystano w szlifowaniu czołowym małych elementów ceramicznych. Ponadto zaproponowano pewien układ diagnostyczny. Zapewnia on estymację parametrów charakteryzujących proces obróbki na podstawie pomiarów z wykorzystaniem czujników o odmiennym przeznaczeniu i sposobie montażu w układzie szlifierki.