Simulation du comportement dynamique d'un système usinant : modélisation de l'interaction outil/matière en présence d'une pièce flexible

Lorong, Philippe; Coffignal, G.; Cohen-Assouline, Stéphanie

doi:10.1051/meca:2008015

Cited by 3 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This approach was later improved by considering the dynamic variation along the cutting depth of cut for both the cutter and workpiece [10,26]. The generalisation of 3D surface profile modelling, for complex thin-wall parts, requires a particularly improved geometrical model using Z-Buffer or Dexel [27]. For thinwall milling, the non-linear impact of the ploughing effect or edge force was also taken into account more recently [28].…”

Section: Introductionmentioning

confidence: 99%

Simulation of low rigidity part machining applied to thin-walled structures

Arnaud

Gonzalo

Seguy

et al. 2010

Int J Adv Manuf Technol

107

View full text Add to dashboard Cite

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.Simulation of low rigidity part machining applied to thin-walled structuresAbstract The aim of this study is to evaluate the modelling of machining vibrations of thin-walled aluminium workpieces at high productivity rate. The use of numerical simulation is generally aimed at giving optimal cutting conditions for the precision and the surface finish needed. The proposed modelling includes all the ingredients needed for real productive machining of thin-walled parts. It has been tested with a specially designed machining test with high cutting engagement and taking into account all the phenomena involved in the dynamics of cutting. The system has been modelled using several simulation techniques. On the one hand, the milling process was modelled using a dynamic mechanistic model, with time domain simulation. On the other hand, the dynamic parameters of the system were obtained step by step by finite element analysis; thus the variation due to metal removal and the cutting edge position has been accurately taken into account. The results of the simulations were compared to those of the experiments; the discussion is based on the analysis of the cutting forces, the amplitude and the frequency of the vibrations evaluating the presence of chatter. The specific difficulties to perfect simulation of thin-walled workpiece chatter have been finely analysed.

show abstract

Section: Introductionmentioning

confidence: 99%

Simulation of low rigidity part machining applied to thin-walled structures

Arnaud

Gonzalo

Seguy

et al. 2010

Int J Adv Manuf Technol

107

View full text Add to dashboard Cite

show abstract

“…Methods using finite elements to model the tool-part contact are promising but remain limited by the complexity of the mechanical models and by the long-time simulation for realistic machining operations. Currently, they still do not provide the expected comprehensive approach [10] and simplified model must be used. Thus, since the early 2000s, various approaches based on the analysis of the stability of models using DDE have been presented [11,12].…”

Section: Introductionmentioning

confidence: 99%

Chatter in interrupted turning with geometrical defects: an industrial case study

Seguy¹,

Arnaud²,

Insperger³

2014

Int J Adv Manuf Technol

View full text Add to dashboard Cite

In this paper, machine tool chatter arising in an interrupted turning process is investigated in a strong industrial context with a complex flexible part. A detailed analysis of the real cutting process is performed with special respect to the geometrical defects of the part in order to highlight the source of machine tool vibrations. The analysis is completed by simple models to estimate the forced vibrations in interrupted turning, the gyroscopic effect, and the mode coupling using a new simplified formulation. Then, a new dynamical model with interrupted cutting and geometrical inaccuracies-runout and orientation of eccentricity-is presented. Stability analysis of this model is performed by the semidiscretization method, an improved technique for analyzing delay-differential equations. The use of all these models on a given machining configuration allows comparing several vibration mechanisms. Thus, behavior's specificities are highlighted, especially the influence of eccentricity runout on stability. A sensitivity analysis shows the effect of the value and the orientation of the geometrical defects for low speed conditions. Then this result are extrapolated to high-speed conditions to look for possible new stable cutting conditions and shows a period doubling flip instability, never described before in turning operations. The main focus of this paper is developing and exploring a stability model for interrupted cutting in turning with geometrical defects. The complexity of the industrial context led to methodically compare different chatter and vibration mechanisms; this approach can be generalized to other industrial contexts.

show abstract

Control of Accuracy of Forming Elastic-Deformable Shafts with Low Rigidity

Świć

Gola

2017

Distributed Computing and Artificial Intelligence, 14th International Conference

View full text Add to dashboard Cite

Simulation du comportement dynamique d'un système usinant : modélisation de l'interaction outil/matière en présence d'une pièce flexible

Cited by 3 publications

References 4 publications

Simulation of low rigidity part machining applied to thin-walled structures

Simulation of low rigidity part machining applied to thin-walled structures

Chatter in interrupted turning with geometrical defects: an industrial case study

Control of Accuracy of Forming Elastic-Deformable Shafts with Low Rigidity

Contact Info

Product

Resources

About