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Technical Briefs

Experimental Investigation of Microcutting Mechanisms in Granite Grinding

[+] Author and Article Information
Lj. Tanovic

Department of Production Engineering, Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, Belgrade 11120, Serbialtanovic@mas.bg.ac.rs

P. Bojanic

Department of Production Engineering, Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, Belgrade 11120, Serbiapbojanic@mas.bg.ac.rs

R. Puzovic

Department of Production Engineering, Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, Belgrade 11120, Serbiarpuzovic@mas.bg.ac.rs

M. Milutinovic

Department of Production Engineering, Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, Belgrade 11120, Serbiadmilutinovic@mas.bg.ac.rs

J. Manuf. Sci. Eng 133(2), 024501 (Mar 07, 2011) (5 pages) doi:10.1115/1.4003521 History: Received December 18, 2009; Revised January 19, 2011; Published March 07, 2011; Online March 07, 2011

This paper shows the results of investigations performed in the brittle materials microcutting at the Faculty of Mechanical Engineering, Belgrade University. The interactions between a single diamond grain and the machined granite are analyzed. The change in the normal cutting force as a function of grain penetration speed and depth was experimentally established in microcutting of two types of granite originating from Serbia. Based on the grain traces on granite and the generated cracks, the critical grain penetration depth for the formation of brittle fracturing was established. The experiments are intended to assist in the optimization of the grinding process as technology dominant in the granite finishing.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Indentation of brittle materials: formation of the large-strain zone

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Figure 2

Indentation fracture in brittle materials: transition from splitting penny-shaped cracks to median-vent cracks under sharp indenters

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Figure 3

Microcutting with diamond grain rotary motion: scheme 1 and axial motion-scheme 1

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Figure 4

Microcutting with diamond grain rotary and radial motion: scheme 2

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Figure 5

Experimental setup for measuring the normal component of the microcutting force

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Figure 6

Change of the normal force as a function of grain penetration depth in microcutting: (a) GJ granite and (b) GB granite

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Figure 7

Illustration of scratching mechanisms for granite

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Figure 8

Occurrences on the GJ granite microcutting, scheme 1 (a=0.05 mm,  Vs=7.85 m/s,×125)

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Figure 9

Trace of microcutting, scheme 2 (a=0.025 mm,  Vs=15.7 m/s,×100): (a) GJ granite and (b) GB granite

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