The influence of thermal conductivity on segmented chip formation

Bäker, Martin; Rösler, Joachim; Siemers, Carsten

doi:10.1016/s0927-0256(02)00396-8

Cited by 38 publications

(24 citation statements)

References 9 publications

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“…Bäker et al [17] studied the influence of thermal conductivity on the chip segmentation process. Increase in thermal conductiv-ity leads to a decreasing degree of segmentation and increasing in the cutting force, showing the importance of heat localization in the formation of segmented chips.…”

Section: Introductionmentioning

confidence: 99%

Analysis of adiabatic shear banding in orthogonal cutting of Ti alloy

Miguélez¹,

Soldani²,

Molinari³

2013

International Journal of Mechanical Sciences

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This work is focused on the numerical analysis of adiabatic shear banding in orthogonal cutting of Ti6Al4V alloy. Segmented chip results from adiabatic shear banding, depending on the competition of thermal softening and strain and strain rate hardening. The influence of cutting velocity and feed in the chip segmentation is studied. Also the role of friction at the tool-chip interface and the effect of rheological parameters of the constitutive equation are analyzed. Experimental tests obtained from previous work of the authors [Molinari A, Musquar C, Sutter G, Adiabatic shear banding in high speed machining of Ti-6Al-4V experiments and modeling, Int J Plast, vol. 18, 2002, p. 443-459] and others were used as a reference to validate the models. Cutting forces and the mechanism of plastic flow localization are analyzed in terms of frequency of segmentation and shear band width and compared to experimental data.

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Section: Introductionmentioning

confidence: 99%

Analysis of adiabatic shear banding in orthogonal cutting of Ti alloy

Miguélez¹,

Soldani²,

Molinari³

2013

International Journal of Mechanical Sciences

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“…The fourth-order polynomial can also approximate Usui's and Iwata's models with good accuracy by setting the series coefficients accordingly. Finally, frictionless contact has also been assumed by several authors [11,33,43,69,71,72,80,81]. Despite the importance of friction in machining simulation, most authors agree that the existing models present limitations and further experimental-numerical efforts are still required to describe interaction between tool and workpiece.…”

Section: Friction Modelsmentioning

confidence: 99%

Modelling and Simulation of Machining Processes

Vaz

Owen

Kalhori

et al. 2007

Arch Computat Methods Eng

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The modelling of metal cutting has proved to be particularly complex due to the diversity of physical phenomena involved, including thermo-mechanical coupling, contact/friction and material failure. The present work outlines the wide range of complex physical phenomena involved in the chip formation in a descriptive manner. In order to improve and understand the process different numerical strategies have been used for simulation. Several of these numerical strategies are reviewed and a short discussion of their relative merits and drawbacks is presented. By means of several examples, where a combined experimental/numerical effort was undertaken, we try to illustrate what numerical techniques, models and pertinent parameters are needed for successful simulations.

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“…Concerning the first aspect, the simulations are focusing on the influence of simulation parameters such as the flow stress [94], the thermal conductivity [95], or influence of the hourglass treatment [89] on the chip morphology (curvature, thickness, segmentation).…”

Section: Typical Applications Of Numerical Simulation On Machiningmentioning

confidence: 99%

Contribution of computational mechanics in numerical simulation of machining and blanking: State-of-the-Art

Lorong

Yvonnet

Coffignal

et al. 2006

Arch Computat Methods Eng

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. SummaryBlanking and machining are commonly used in processes to obtain the shape of many mechanical pieces. Although considerable number of experimental results exist, certain essential aspects of cutting are still not well understood. This comes from the complexity of the thermomechanical phenomena induced by the material separation as well as from the complexity of the dynamical behaviour of the whole workpiece/tool/machine system. Numerical simulations make it possible to go further in the comprehension and the prediction of machining and cutting processes. In this work the state-of-the art is analysed and we present the most recent developments in the contribution of computational mechanics to numerical simulation of machining and blanking. This contribution is, on one hand, developed at a very global scale called macroscopic scale. At this scale a representation of the deformations of the piece is necessary, for example when thin walls are present, and when both predictions of the geometrical state of final surface and/or stability of the process are expected. On the other hand, the contribution is also located at a more local scale: the mesoscopic scale. At this scale, the aim is the determination of thermomechanical sollicitations applied to the tool, the simulation of chip formation, or the description of residual states (mechanical, chemical) inside the workpiece after machining.

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The influence of thermal conductivity on segmented chip formation

Cited by 38 publications

References 9 publications

Analysis of adiabatic shear banding in orthogonal cutting of Ti alloy

Analysis of adiabatic shear banding in orthogonal cutting of Ti alloy

Modelling and Simulation of Machining Processes

Contribution of computational mechanics in numerical simulation of machining and blanking: State-of-the-Art

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