The influence of tool wear particles scattering in the contact zone on the workpiece surface microprofile formation in polishing quartz

Filatov, Yu. D.; Filatov, A. Yu.; Syrota, O. O.; Yashchuk, Vasil P.; Monteil, Guy; Heisel, Uwe; Storchak, Michael

doi:10.3103/s1063457610060079

Cited by 25 publications

(7 citation statements)

References 3 publications

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“…The parameters of the constitutive equation were determined by repeated DOE (design of experiments) iterations; see, e.g., [61,66]. The first iteration results of determining the Johnson-Cook constitutive equation parameters for the studied three values of the tool rake angles are shown in Figure 4.…”

Section: Results and Discussion Of Contact Length Determination Using...mentioning

confidence: 99%

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Determination of the Tool–Chip Contact Length for the Cutting Processes

et al. 2022

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The thermomechanical interaction of the tool with the chip in the most loaded secondary cutting zone depends on the contact length of the tool rake face with the chip. Experimental studies of the dependency of the contact length on the cutting speed, the undeformed chip thickness, and the tool rake angle, performed by the optical method, are used for comparison with the contact length obtained by the FE modeling of the orthogonal cutting process. To determine the parameters of the constitutive Johnson–Cook equation, which serves as a material model of the FE cutting model that has a predominant influence on the contact length, a software-implemented algorithm was developed. This algorithm is based on determining the generalized parameters of the constitutive equation through finding the intersection of these parameter sets. The plurality intersection of the parameter sets of the constitutive equation is determined by means of the design of experiments and refined by subsequent multiple iterations. The comparison of the contact length values, obtained by simulating the cutting process using the generalized parameters of the constitutive equation as a material model with their experimental values, does not exceed 12% for a wide range of cutting speeds and depths of cut, as well as for the tool rake angle.

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Section: Results and Discussion Of Contact Length Determination Using...mentioning

confidence: 99%

“…Orthogonal cutting was performed on workpieces from AISI 1045 steel with a thickness of 3 mm, a length of 170 mm, and a height of 60 mm. To achieve the necessary geometric accuracy, the edges of the workpiece were pre-ground and polished [61,62]. To remove residual stresses, the workpiece was subjected to thermal annealing.…”

Section: Methodsmentioning

confidence: 99%

Determination of the Tool–Chip Contact Length for the Cutting Processes

et al. 2022

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“…The scheme of the deforming broaching process and the deforming broach used to perform this machining process are shown in Figure 4. Before the machining process, the working surfaces of the broach-deforming elements were polished using tools with bonded superhard materials [49,50]. The outer diameter of the workpiece (bush) was D = 55 mm, its initial inner diameter was d0 = 35 mm, and the length of the bush was H = 80 mm.…”

Section: Methodsmentioning

confidence: 99%

Plasticity Resource of Cast Iron at Deforming Broaching

Nemyrovskyi

Shepelenko

Storchak

2023

Metals

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The contact interaction mechanics of deformation broaching in low-plasticity materials is studied. Particular attention is paid to the study of the stress–strain state parameters and the plasticity margin in the deformation zone during the machining of gray cast iron EN-GJL-200. The stress–strain state was analyzed using a finite-element model of the deforming broaching process for each area of the deformation zone. The model parameters of the machined material were determined experimentally by compressing specimens of gray cast iron EN-GJL-200. The changes in the parameters of accumulated strain, stress tensor components, stress triaxiality ratio, hydrostatic stress, and plasticity margin at different deformation zones along the machined specimen depth are analyzed. It is shown that there is a zone of local plastic deformation in conditions of critical contact stresses. This leads to the appearance of tensile stresses that reduce the plasticity margin in the surface layer. The impact of tool geometry on the stress–strain state of the surface layer is also discussed, and recommendations for the optimal working angle of the deforming element are provided based on plasticity margin minimization.

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“…It is from this region that the tool wear particles start to move towards the workpiece surface, with a zero-angle scattering. The scattering behavior of the tool wear particles in the contact zone and the mechanism of formation of the workpiece surface microprofile in polishing quartz were described in [20]. The formation of a wearparticles deposit on the tool working surface in polishing flat components of optical glass was detailed in [21].…”

Section: Contact Zonementioning

confidence: 99%