Study on Surface Roughness of Gcr15 Machined by Micro-Texture PCBN Tools

Pan, Chen; Li, Qinghua; Hu, Kaixing; Jiao, Yuxin; Song, Yumei

doi:10.3390/machines6030042

Cited by 20 publications

(7 citation statements)

References 9 publications

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“…On the contrary, the flow density of fast argon atoms arriving at the reamer from the grid (Figure 3) is distributed on its surface quite homogeneously. Sputtering by the fast atoms results in removal from the cutting edge and neighboring surface [45,46] of a layer with uniform thickness, which should result in the tool sharpening [47]. Figure 5b demonstrates profiles of the reamer cutting edges, their width w, and height h being measured in µm, prior to the processing (on the left) as well as after sharpening and nitriding (in the middle).…”

Section: Resultsmentioning

confidence: 99%

Equipment and Technology for Combined Ion–Plasma Strengthening of Cutting Tools

et al. 2018

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Y.A.M.); m.volosova@stankin.ru (M.A.V.)Abstract: A combined strengthening of cutting tools for finishing has been carried out in glow discharge plasma filling a process vacuum chamber. At the first stage, reamers rotating around the axis distanced from the magnetron targets at 8 cm were bombarded by fast argon atoms produced due to charge exchange collisions of ions accelerated in space charge sheathes between the plasma and a negatively biased to 3 kV grid with a 25 cm radius of its concave surface curvature. The reamer bombardment by fast neutral atoms led to a reduction of its cutting-edge radius from~7 µm to~2 µm. At the second stage, the reamer surface was nitrided within 1 h at a temperature of 500 • C stabilized by regulation of the negative bias voltage accelerating the nitrogen ions. At the third stage, a 3 µm thick TiN coating has been synthesized on the reamer bombarded by pulsed beams of 3 keV neutral atoms at a 50 Hz repetition rate of 50 µs wide pulses. After the combined strengthening, the cutting edge radius of the coated reamer amounted to~5 µm and the roughness of the area machined by the reamer holes in blanks made of structural steel reduced by about 1.5 times.

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Section: Resultsmentioning

confidence: 99%

Equipment and Technology for Combined Ion–Plasma Strengthening of Cutting Tools

et al. 2018

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“…With the development of the manufacturing industry, the texturization of cutting tools has become a new research direction and hotspot in the field of machining. Numerous studies have demonstrated that machining microns or nanoarrays of various shapes, distributions and sizes on the rake (back) face of tools can decrease cutting force (Deng et al , 2014; Liu et al , 2019), cutting temperature (Qi et al , 2011), friction coefficient (Kim et al , 2016; Gajrani et al , 2016), tool life (Li et al , 2019a; Sasi et al , 2017) and surface quality (Pan et al , 2018; Zhang et al , 2020). In addition, some researchers have investigated the effect of microtexture tools on chip formation and have discovered that machining microtexture on the rake tool face can change the tool chip contact state, subsequently influencing chip formation.…”

Section: Introductionmentioning

confidence: 99%

The influence of microtexture tools on the geometric morphology of serrated chips based on stress triaxiality

Guo,

Fan,

et al. 2023

ILT

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Purpose This study aims to investigate the effect of microtextured tools on the geometric morphology of serrated chips, and further improve the cutting performance of polycrystalline cubic boron nitride (PCBN) tool and extend the tool life and the surface quality of the machined surface. Design/methodology/approach A three-dimensional finite element cutting model of hardened steel AISI D2 with microtextured PCBN tools were established using the finite element software Abaqus, and cutting tests were carried out. Furthermore, the stress distribution in the primary deformation zone was investigated based on the triaxiality of stress, and the influence of microtexture on the geometric morphology of serrated chips and crack development was researched. Findings The results show that compared with nontexture tools, elliptical pits and wavy grooves microtexture tools have lower serrated degree Gs, higher serrated frequency f per unit length and more miniature serrated step Pc. The serrated phenomenon is intensified because the tensile stress zone of chips generated by nontextured tools is longer than that of elliptic pits and wavy grooves microtexture tools. Simultaneously, the maximum value of triaxiality in the tensile stress zone achieved by nontexture tools is larger than that of the two microtexture tools, and chips obtained by nontextured tools are more susceptible to propagation fractures. Originality/value This paper mainly studies the effect of microtexture on chip microgeometry, which is relatively little studied at present. At the same time, this paper has a certain engineering significance for PCBN tool turning hardening steel. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2023-0149/

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“…Recently, some scholars observed and studied the surface morphology of earthworms [8], pangolins [9], snakes [10], fishes [11], snails [12], and other organisms, and found that these surface morphologies usually have good properties of desorption, anti-adhesion and wear resistance [13]. Inspired by the biological surface morphologies, the non-smooth surface has been successfully applied to multiple occasions with relative motion, e.g., bearings [14], cylinder liners [15], mechanical seals [16], and cutting tools [17], to improve the tribological properties [18].…”

Section: Introductionmentioning

confidence: 99%

Effects of Snake-Bioinspired Surface Texture on the Finger-Sealing Performance under Varied Working Conditions

et al. 2022

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The tribological performance of the friction pair between the rotor and finger feet is a crucial index affecting the service life of finger seals. In recent years, the surface texture has attracted a considerable number of researchers owing to its extraordinary potential in improving antifriction and wear resistance. This paper, inspired by snakeskins, introduces three texture forms (e.g., diamond, ellipse, and hexagon) into the rotor. The effects on finger-sealing performance are analyzed by considering finger seals’ varied working conditions. First, a numerical model of textured finger seals under hydrodynamic lubrication is established based on the Reynolds equation. Then, the sealing performance analysis of textured finger seals is performed considering varied working conditions given rotation speed, pressure difference, seal clearance, and working temperature. The numerical results show that: (1) the textured domain produces a noticeable hydrodynamic pressure effect and cavitation, which effectively improves the bearing capacity of the fluid film; (2) the higher the rotation speed or the lower the inlet/outlet pressure difference, the stronger the dynamic pressure effect of textured finger seals and the better the antifriction and wear resistance; (3) for good antifriction and wear resistance of a textured finger seal, the seal clearance should be as shallow as possible (≤10 μm), and the working temperature should be as low as possible (≤120 °C); and (4) the ellipse texture has a higher average dimensionless pressure and a lower friction coefficient, which is superior to diamond and hexagon ones in terms of friction and wear performance.

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Study on Surface Roughness of Gcr15 Machined by Micro-Texture PCBN Tools

Cited by 20 publications

References 9 publications

Equipment and Technology for Combined Ion–Plasma Strengthening of Cutting Tools

Equipment and Technology for Combined Ion–Plasma Strengthening of Cutting Tools

The influence of microtexture tools on the geometric morphology of serrated chips based on stress triaxiality

Effects of Snake-Bioinspired Surface Texture on the Finger-Sealing Performance under Varied Working Conditions

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