Details
| Original language | English |
|---|---|
| Pages (from-to) | 8-19 |
| Number of pages | 12 |
| Journal | CIRP Journal of Manufacturing Science and Technology |
| Volume | 5 |
| Issue number | 1 |
| Publication status | Published - 28 Jan 2012 |
Abstract
High performance milling processes are limited by two dominating factors: the available spindle power and the dynamic stability of the process. When the cutting depth exceeds the stability limit, chatter vibrations arise. These vibrations lead to wavy surfaces, increase of the tool wear, acoustic noise and can even damage the spindle. Cutting edge chamfers are a possible means to avoid such vibrations. In this paper it is shown experimentally and theoretically how such chamfers affect the process damping effect and hence the stability limit. A cutting force model is presented, that takes into account the process damping effect and the geometry of the chamfered cutting edge. Theoretically predicted stability charts are compared to experimental data. The process damping coefficients are identified by a very simple wave-on-wave planing method. It is shown that due to cutting edge chamfers process damping is not restricted to the low speed cutting range anymore but also occurs at higher spindle speeds. It is demonstrated, that the key reason for the high speed process damping effect is a kind of mode interaction of the low frequency modes with the high frequency ones. Due to this effect stable as well as unstable islands can arise in the stability charts.
Keywords
- Chatter, Cutting edge chamfer, Milling, Process damping
ASJC Scopus subject areas
- Engineering(all)
- Industrial and Manufacturing Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: CIRP Journal of Manufacturing Science and Technology, Vol. 5, No. 1, 28.01.2012, p. 8-19.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High speed process damping in milling
AU - Sellmeier, V.
AU - Denkena, B.
PY - 2012/1/28
Y1 - 2012/1/28
N2 - High performance milling processes are limited by two dominating factors: the available spindle power and the dynamic stability of the process. When the cutting depth exceeds the stability limit, chatter vibrations arise. These vibrations lead to wavy surfaces, increase of the tool wear, acoustic noise and can even damage the spindle. Cutting edge chamfers are a possible means to avoid such vibrations. In this paper it is shown experimentally and theoretically how such chamfers affect the process damping effect and hence the stability limit. A cutting force model is presented, that takes into account the process damping effect and the geometry of the chamfered cutting edge. Theoretically predicted stability charts are compared to experimental data. The process damping coefficients are identified by a very simple wave-on-wave planing method. It is shown that due to cutting edge chamfers process damping is not restricted to the low speed cutting range anymore but also occurs at higher spindle speeds. It is demonstrated, that the key reason for the high speed process damping effect is a kind of mode interaction of the low frequency modes with the high frequency ones. Due to this effect stable as well as unstable islands can arise in the stability charts.
AB - High performance milling processes are limited by two dominating factors: the available spindle power and the dynamic stability of the process. When the cutting depth exceeds the stability limit, chatter vibrations arise. These vibrations lead to wavy surfaces, increase of the tool wear, acoustic noise and can even damage the spindle. Cutting edge chamfers are a possible means to avoid such vibrations. In this paper it is shown experimentally and theoretically how such chamfers affect the process damping effect and hence the stability limit. A cutting force model is presented, that takes into account the process damping effect and the geometry of the chamfered cutting edge. Theoretically predicted stability charts are compared to experimental data. The process damping coefficients are identified by a very simple wave-on-wave planing method. It is shown that due to cutting edge chamfers process damping is not restricted to the low speed cutting range anymore but also occurs at higher spindle speeds. It is demonstrated, that the key reason for the high speed process damping effect is a kind of mode interaction of the low frequency modes with the high frequency ones. Due to this effect stable as well as unstable islands can arise in the stability charts.
KW - Chatter
KW - Cutting edge chamfer
KW - Milling
KW - Process damping
UR - http://www.scopus.com/inward/record.url?scp=84856673554&partnerID=8YFLogxK
U2 - 10.1016/j.cirpj.2011.12.001
DO - 10.1016/j.cirpj.2011.12.001
M3 - Article
AN - SCOPUS:84856673554
VL - 5
SP - 8
EP - 19
JO - CIRP Journal of Manufacturing Science and Technology
JF - CIRP Journal of Manufacturing Science and Technology
SN - 1755-5817
IS - 1
ER -