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Influence of cutting speed and tool wear on vibrations and process stability when turning Inconel 718 with PCBN tools

Gutnichenko, Oleksandr LU ; Bushlya, Volodymyr LU ; Zhou, Jinming LU and Ståhl, Jan Eric LU (2014) In International Journal of Manufacturing Research 9(2). p.173-193
Abstract

Results of the study of cutting speed and tool wear influence on the vibrations and their nature during machining superalloy Inconel 718 with low cBN content (cBN-L) and binderless pcBN (bcBN) tools are presented. Cutting speed was varied from 2 to 14 m/sec while other cutting conditions were constant. The process evolution was studied with the wavelet transform of tool acceleration spectra. Behaviour of the dynamic system was found to vary with the cutting speed and the specifics of tool wear. It is shown that machining with bcBN tools was accompanied by appearance of significant vibration when cutting speed exceeded 5 m/sec, but the machining with cBN-L was characterised by the suppression of vibrations over the entire speed range.... (More)

Results of the study of cutting speed and tool wear influence on the vibrations and their nature during machining superalloy Inconel 718 with low cBN content (cBN-L) and binderless pcBN (bcBN) tools are presented. Cutting speed was varied from 2 to 14 m/sec while other cutting conditions were constant. The process evolution was studied with the wavelet transform of tool acceleration spectra. Behaviour of the dynamic system was found to vary with the cutting speed and the specifics of tool wear. It is shown that machining with bcBN tools was accompanied by appearance of significant vibration when cutting speed exceeded 5 m/sec, but the machining with cBN-L was characterised by the suppression of vibrations over the entire speed range. This was related to the difference of tool microgeometry development during the course of wear. The wear of bcBN tools, in contrast to cBN-L, was characterised by merger of crater and flank wear and formation of negative clearance angle. Such difference results in an increase of cutting forces 2-4 times as compared to cBN-L tools. Estimation of dynamic stability by 0-1 test confirmed the process instability when turning with bcBN tools at cutting speeds higher than 8 m/sec which concurs with chatter appearance.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dynamic stability, Inconel 718, PcBN, Tool wear, Turning, Vibrations
in
International Journal of Manufacturing Research
volume
9
issue
2
pages
21 pages
publisher
Inderscience Publishers
external identifiers
  • scopus:84902188780
ISSN
1750-0591
DOI
10.1504/IJMR.2014.062444
language
English
LU publication?
yes
id
05447579-a74e-4732-bc22-620ef310c7a3
date added to LUP
2019-01-15 14:12:19
date last changed
2021-06-23 06:16:18
@article{05447579-a74e-4732-bc22-620ef310c7a3,
  abstract     = {<p>Results of the study of cutting speed and tool wear influence on the vibrations and their nature during machining superalloy Inconel 718 with low cBN content (cBN-L) and binderless pcBN (bcBN) tools are presented. Cutting speed was varied from 2 to 14 m/sec while other cutting conditions were constant. The process evolution was studied with the wavelet transform of tool acceleration spectra. Behaviour of the dynamic system was found to vary with the cutting speed and the specifics of tool wear. It is shown that machining with bcBN tools was accompanied by appearance of significant vibration when cutting speed exceeded 5 m/sec, but the machining with cBN-L was characterised by the suppression of vibrations over the entire speed range. This was related to the difference of tool microgeometry development during the course of wear. The wear of bcBN tools, in contrast to cBN-L, was characterised by merger of crater and flank wear and formation of negative clearance angle. Such difference results in an increase of cutting forces 2-4 times as compared to cBN-L tools. Estimation of dynamic stability by 0-1 test confirmed the process instability when turning with bcBN tools at cutting speeds higher than 8 m/sec which concurs with chatter appearance.</p>},
  author       = {Gutnichenko, Oleksandr and Bushlya, Volodymyr and Zhou, Jinming and Ståhl, Jan Eric},
  issn         = {1750-0591},
  language     = {eng},
  month        = {01},
  number       = {2},
  pages        = {173--193},
  publisher    = {Inderscience Publishers},
  series       = {International Journal of Manufacturing Research},
  title        = {Influence of cutting speed and tool wear on vibrations and process stability when turning Inconel 718 with PCBN tools},
  url          = {http://dx.doi.org/10.1504/IJMR.2014.062444},
  doi          = {10.1504/IJMR.2014.062444},
  volume       = {9},
  year         = {2014},
}