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Chip morphology study in high speed drilling of Al-Si alloy

Akhavan Farid, A. and Sharif, Safian and Idris, Mohd. Hasbullah (2011) Chip morphology study in high speed drilling of Al-Si alloy. International Journal of Advanced Manufacturing Technology, 57 (005-00). pp. 1-10. ISSN 0268-3768

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Official URL: http://dx.doi.org/10.1007/s00170-011-3325-3

Abstract

Chip formation during drilling operation is greatly influenced by the cutting parameters such as cutting speed, feed rate, and drill geometry. However, not many studies have focused on the direct observation of the chip formation during high speed drilling. This paper investigates the effect of cutting speed and feed rate on the chip morphology during high speed drilling of aluminum-silicon alloys using carbide drill. Observation on the multiview characterization of the chips was carried out which includes free surface, back surface, and cross-section of top surface. Structure and shape alterations of the free and back surfaces were analyzed using a scanning electron microscope. Finally, different geometrical parameters of chip cross-section were measured in order to study the effect of cutting parameters on chip compression ratio and thrust force. It was found that increase in cutting speed significantly affects the chip morphology especially on the structure of free surface and cross-section of the chips. Results also showed that built-up edge on the rake face of tool played an important role on the formation of irregular pattern on the chip back surface.

Item Type:Article
Uncontrolled Keywords:Al-Si alloy, back surface, chip, chip compression ratio, free surface, high speed drilling
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:28850
Deposited By: Liza Porijo
Deposited On:29 Nov 2012 07:37
Last Modified:29 Nov 2012 07:37

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