A novel approach to determine the velocity dependency of the friction behavior during machining by means of digital particle image velocimetry (DPIV)

Denkena, Berend; Krödel, Alexander; Beblein, Sascha

doi:10.1016/j.cirpj.2020.11.007

Cited by 13 publications

(9 citation statements)

References 15 publications

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“…Furthermore, it becomes clear that the temperatures increase significantly with the increase of S α /S γ , especially for cutting edges with K < 1. The further validation of the simulated sliding velocity as well as the tool temperature in comparison to experimental results considering the adapted simulation model is presented in detail in the works of Breidenstein et al [29] and Denkena et al [30] For an accurate prediction of the resulting wear, a parameterization of the wear rate model has to be carried out for every workpiece/tool combination. Since these investigations are an absolute comparison of the wear behavior of different cutting edge microgeometries with the same workpiece/tool combination, this can be neglected.…”

Section: Simulation Resultsmentioning

confidence: 99%

FE-Simulation Based Design of Wear-Optimized Cutting Edge Roundings

Bergmann

Denkena

Beblein³

et al. 2021

JMMP

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The performance of cutting tools can be significantly enhanced by matching the cutting edge rounding to the process and material properties. However, the conventional cutting edge rounding design is characterized by a significant number of experimental machining studies, which involve considerable cost, time, and resources. In this study, a novel approach to cutting edge rounding design using FEM-based chip formation simulations is presented. Based on a parameterized simulation model, tool temperatures, stresses and relative velocities can be calculated as a function of tool microgeometry. It can be shown that the external tool loads can be simulated with high agreement. With the help of these loads and the use of wear models, the resulting tool wear and the optimum cutting edge rounding can be determined. The final experimental investigations show a qualitatively high agreement to the simulation, which will enable a reduced effort design of the cutting edge in the future.

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Section: Simulation Resultsmentioning

confidence: 99%

FE-Simulation Based Design of Wear-Optimized Cutting Edge Roundings

Bergmann

Denkena

Beblein³

et al. 2021

JMMP

Self Cite

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“…One of the drawbacks of these experiments is the slow cutting speed used in the cutting tests (0.5 mm/s). Recently, Denkena et al 95 analyzed the tribological mechanisms in machining via high‐speed chip formation recording. They found, for different tool coating and cutting speeds (50–150 m/min), a significant influence of the sliding speed at the tool–chip interface on the friction coefficient, as shown in Figure 15.…”

Section: Dynamics Of Chip Formationmentioning

confidence: 99%

Section: Dynamics Of Chip Formationmentioning

confidence: 99%

Dynamics of chip formation during the cutting process using imaging techniques: A review

Nie

Yang

Zhang

et al. 2022

Int Journal of Mech Sys Dyn

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Imaging techniques have been widely implemented to study the dynamics of chip formation. They can offer a direct method and a full field measurement of the cutting process, providing kinematic information of the chip formation process. In this article, the state of the art of the imaging techniques reported in the literature has been summarized and analyzed. The imaging techniques have been applied to study the chip formation mechanism, friction behavior, strain/strain rate, and stress fields. Furthermore, the study of surface integrity has been advanced by deriving the thermo‐mechanical loading, subsurface deformation, and material constitutive model from the imaging technique. Finally, achievements in the area of imaging techniques have been summarized, followed by future directions for their application in the study of surface integrity.

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“…For the investigations, a planing test rig previously used for dry cutting experiments [14,15] was extended to perform experiments with MWF. To achieve high dynamic MWF pressures without long response times, an accumulator systems is used (Fig.…”

Section: Planing Test Rigmentioning

confidence: 99%

Influence of metal working fluid on chip formation and mechanical loads in orthogonal cutting

Denkena

Krödel

Ellersiek

2021

Int J Adv Manuf Technol

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Metal working fluids are used in machining processes of many hard-to-cut materials to increase tool life and productivity. Thereby, the metal working fluids act on the thermal and on the mechanical loads of the tool. The changing mechanical loads can mostly be attributed to the changing friction between rake face and chip and changes in the chip formation, e.g., the contact length between rake face and chip. However, analyzing those effects is challenging, since a detailed look at the chip formation process is prevented by the metal working fluid. In this paper, a novel planing test rig is presented, which enables high-speed recordings of the machining process and process force measurements while using metal working fluids. Experiments reveal that process forces are reduced with increasing pressure of the metal working fluid. However, the average friction coefficient only changes slightly, which indicates that the reduced process forces are mainly the result of reduced contact lengths between rake face and chip.

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A novel approach to determine the velocity dependency of the friction behavior during machining by means of digital particle image velocimetry (DPIV)

Cited by 13 publications

References 15 publications

FE-Simulation Based Design of Wear-Optimized Cutting Edge Roundings

FE-Simulation Based Design of Wear-Optimized Cutting Edge Roundings

Dynamics of chip formation during the cutting process using imaging techniques: A review

Influence of metal working fluid on chip formation and mechanical loads in orthogonal cutting

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