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Monitoring of cutting process in end milling of hard and brittle materials

100%

Shimana K. , Kondo E. , Yoshidome A. , Yamashita S. , Kawano Y.

2014

tom Vol. 14, No. 4

55--64

Glass materials have been widely used in optical components in recent years. The purpose of this study was to develop an effective method for real-time detection of the state of cutting tools used in end milling of hard brittle materials. Cutting tests were performed to identify parameters that are useful in monitoring micro tool wear in glass milling. A specific component of the cutting force was found to be related to the progression of tool wear. Furthermore, using fast Fourier transform (FFT) analysis, the peak amplitudes of the cutting forces were found to occur at a specific frequency.

Tool wear characteristics in machining of hypereutectic Al-Si alloys by cemented carbide tool

100%

Kobaru Y. , Nagaoka R. , Shimana K. , Yoshimitsu S. , Kondo E.

tom Vol. 20, No. 2

94--103

During of hypereutectic Al-Si alloys, tool wear increases owing to the presence of silicon particles. Therefore, polycrystalline diamond tools are typically used, but they are very expensive. The purpose of this study is to examine the tool wear characteristics during the end milling of hypereutectic Al-Si alloy (A390–T6) by using comparatively inexpensive diamond-like carbon coated cemented carbide tools. Al-Si alloy was end-milled by changing the cutting speed. Our results revealed that the width of flank wear land increased monotonously with increasing of the cutting force regardless of the cutting speed. In addition, the experimental equation of the width of flank wear land was derived as a function of cutting speed and time, and it was clarified that width of flank wear land could be approximated.

Wpływ kąta pochylenia krawędzi skrawającej frezu na proces odprowadzania wiórów ze strefy skrawania

63%

Burek J. , Żyłka Ł. , Płodzień M. , Sułkowicz P. , Buk J.

2017

tom R. 90, nr 11

962--964

Przedstawiono wpływ kąta pochylenia krawędzi skrawającej frezu walcowo-czołowego na proces odprowadzania (kąt i prędkość) wiórów ze strefy skrawania podczas wysoko wydajnego frezowania stopu aluminium AlZn5.5MgCu.

The influence of the cutting edge helix angle of the end milling cutter on the chips removal process (angle and velocity) from the cutting zone during high-performance milling of AlZn5.5MgCu aluminum alloy is presented.