Chatter stability analysis in Micro-milling with aerostatic spindle considering speed effect

2022 ◽  
Vol 169 ◽  
pp. 108620
Author(s):  
Jianghai Shi ◽  
Xiaoliang Jin ◽  
Hongrui Cao
Keyword(s):  
Stability Analysis ◽  
Micro Milling ◽  
Chatter Stability ◽  
Speed Effect ◽  
Aerostatic Spindle

Robust chatter stability in micro-milling operations

CIRP Annals ◽  
2010 ◽  
Vol 59 (1) ◽  
pp. 391-394 ◽  
Author(s):  
S.S. Park ◽  
R. Rahnama
Keyword(s):  
Micro Milling ◽  
Chatter Stability ◽  
Milling Operations

Chatter Stability Model of Micro-Milling With Process Damping

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Xiaoliang Jin ◽  
Yusuf Altintas
Keyword(s):  
Finite Element ◽  
Cutting Speed ◽  
Rake Angle ◽  
Micro Milling ◽  
Piezo Actuator ◽  
Chatter Stability ◽  
Line Field ◽  
Process Damping ◽  
Aisi 1045 Steel ◽  
1045 Steel

This paper presents the prediction of cutting forces and chatter stability of micro-milling operations from the material's constitutive flow stress and structural dynamics of the micro-end mill. The cutting force coefficients are identified either using previously presented slip-line field or finite element methods by considering the effects of chip size, cutting edge radius, rake angle and cutting speed. The process damping caused by the plowing of round edge is modeled by finite element method. The frequency response function of the fragile micro-mill is measured through specially devised piezo actuator mechanism. Dynamic model of micro-milling with the velocity dependent process damping mechanism is presented, and the chatter stability is predicted in frequency domain. The proposed models have been experimentally verified in micro-milling of AISI 1045 steel.

scholarly journals Chatter Stability Analysis of Milling Processes

PAMM ◽  
2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Roman Binder ◽  
Katrin Ellermann ◽  
Harald Sehrschön
Keyword(s):  
Stability Analysis ◽  
Chatter Stability

Stability analysis in milling of thin-walled workpieces with emphasis on the structural effect

2009 ◽  
Vol 224 (4) ◽  
pp. 589-608 ◽  
Author(s):  
X-J Zhang ◽  
C-H Xiong ◽  
Y Ding ◽  
X-M Zhang
Keyword(s):  
Stability Analysis ◽  
Great Influence ◽  
Structural Effect ◽  
Experimental Results ◽  
Machining Parameters ◽  
Chatter Stability ◽  
Milling Stability ◽  
Thin Walled ◽  
Five Axis ◽  
Milling Chatter

Regenerative chatter easily occurs in milling and has become the common limitation to achieve good surface quality and high productivity. For the purpose of chatter avoidance, the structural effect of the thin-walled part should be considered for the milling chatter stability analysis for the optimization of axial cutting depth and spindle speed pairs. The main objective of this paper is to examine the link between the structural modes (i.e. modal shapes) and the chatter stability limits in the case of finish milling thin-walled workpieces. In this paper, the dynamic stability of the milling process of thin-walled workpieces is investigated through a two-degree-of-freedom mechanical model. The mathematical relationship between the critical axial depth and the thin-walled part modal shapes is deduced and an optimal calculation process of milling stability lobes is presented. Peripheral milling of aluminium alloy (2A70 Al) plates is carried out on a computer numerically controlled (CNC) five-axis super high-speed machining centre to validate the method. The experimental results agree with the prediction by the presented method. Additionally, the experimental results show that the cutting stability is also influenced by the modal frequencies of the thin-walled part, which have a great influence on the milling stability analysis when the tool passing frequency (i.e. the inverse of the tooth passing period) harmonics are close to the modal frequencies of the part. The presented method is effective in the prediction of milling chatter limits in the thin-walled case for the optimization of machining parameters.

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