Journal
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
Volume 48, Issue -, Pages 9-17Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.precisioneng.2016.10.008
Keywords
Micro ball end mill; CAD based generation; Edge radius; Stereo microscope; Confocal microscope; Destructive measurement
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Funding
- DST [SR/S3/MERC-68/2004 dated 08-06-2007]
- IIT Madras [MEE/03-04/181/IDRP/OVKC]
- DST-FIST [SR/FST/ETII-059/2013]
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Cutting edge radius plays an important role in conventional micro machining process, as it is of the same order as uncut chip thickness. Therefore it is important to measure the edge radius accurately. There is no recommended methodology, as of now, to measure edge radius of a ball end mill. An attempt is made in this paper to study edge radius of ball end mill at normal and transverse planes on a virtual ball end mill generated using kinematic relations in CAD environment. In the present study, non-destructive methods using confocal microscope and stereo microscope are used to measure edge radius. These measurements capture the edge radius on the transverse plane. For confirmation, the tool sectioned in the transverse plane by a low speed diamond saw is examined under scanning electron microscope and the radius is assessed using suitable software. Among the non-contact approaches proposed in this work, confocal method appeared to be more reliable considering the reproducibility aspect. (C) 2016 Elsevier Inc. All rights reserved.
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