TY - JOUR
T1 - Investigations into the influence of tool helix angle during end milling of open straight and curved thin-wall parts
AU - Bolar, Gururaj
AU - Joshi, Shrikrishna N.
N1 - Funding Information:
This work was supported by the Science and Engineering Research Board (SERB), Department of Science and Technology, Government of India (Grant number: SR-S3-MERC-0115-2012).
Publisher Copyright:
Copyright © 2020 Inderscience Enterprises Ltd.
PY - 2020
Y1 - 2020
N2 - In this paper, the influence of cutting tool helix angle on performance parameters viz., milling force, part deflection, surface finish, chip morphology and micro-hardness considering open straight and curvilinear thin-walled parts is analysed. It was found that end mills with helix angle of 45ºand 55ºhelped in achieving good surface finish and form accuracy while machining thin-wall parts. During machining, parts having concave geometry due to its inherent rigidity, generated higher milling force. But the wall deflection and form error was relatively lower in comparison with the straight wall thereby resulting in better surface finish. Also, formation of built-up-edge (BUE) at the cutting edge of end mills having 35° helix was noted which aided in surface defects. Back surface of the chips machined using 35ºtools showed prominent lamella like structures but tools having higher helix angles were found to produce relatively lamella free surface.
AB - In this paper, the influence of cutting tool helix angle on performance parameters viz., milling force, part deflection, surface finish, chip morphology and micro-hardness considering open straight and curvilinear thin-walled parts is analysed. It was found that end mills with helix angle of 45ºand 55ºhelped in achieving good surface finish and form accuracy while machining thin-wall parts. During machining, parts having concave geometry due to its inherent rigidity, generated higher milling force. But the wall deflection and form error was relatively lower in comparison with the straight wall thereby resulting in better surface finish. Also, formation of built-up-edge (BUE) at the cutting edge of end mills having 35° helix was noted which aided in surface defects. Back surface of the chips machined using 35ºtools showed prominent lamella like structures but tools having higher helix angles were found to produce relatively lamella free surface.
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U2 - 10.1504/IJMMM.2020.107053
DO - 10.1504/IJMMM.2020.107053
M3 - Article
AN - SCOPUS:85084539220
SN - 1748-5711
VL - 22
SP - 212
EP - 232
JO - International Journal of Machining and Machinability of Materials
JF - International Journal of Machining and Machinability of Materials
IS - 3-4
ER -