Technical diagnostics functioning machines and mechanisms

Kiselev, M. I.; Pronyakin, V. I.; Tulekbaeva, A K

doi:10.1088/1757-899x/312/1/012012

Cited by 18 publications

(1 citation statement)

References 5 publications

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“…Unfortunately, the processes of the nucleation (development) of the cracks, leading to the brittle fracture of the ceramic tool, occur rapidly in the process of cutting. The modern instrument base (vibroacoustic and acoustic-emissive sensors) makes it possible to adequately predict and identify the brittle fracturing process by collecting and processing the diagnostic information from the cutting zone [17][18][19]. However, visualization of the cutting zone is practically impossible due to the specific nature of metalworking, and all conclusions made are based mainly on the results of mathematical modeling [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

The Role of Thin-Film Vacuum-Plasma Coatings and Their Influence on the Efficiency of Ceramic Cutting Inserts

et al. 2018

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The main problem with ceramics used in cutting tools is related to the unpredictable failures caused by the brittle fracturing of ceramic inserts, which is critical for the intermittent milling of cyclic loading. A 125-mm-diameter eight-toothed end mill, with a mechanical fastening of ceramic inserts, was used as a cutting tool for milling hardened steel (102Cr6). For the experiments, square inserts of the Al2O3 + SiC ceramic were used and compared with the samples made of Al2O3 + TiC to confirm the obtained results. The samples were coated with diamond-like coating (DLC), TiZrN, and TiCrAlN coatings, and their bending strength and adhesion were investigated. Investigations into the friction coefficient of the samples and operational tests were also carried out. The effect of smoothing the microroughness and surface defects in comparison with uncoated inserts, which are characteristic of the abrasive processing of ceramics, was investigated and analyzed. The process developed by the authors of the coating process allows for the cleaning and activation of the surface of ceramic inserts using high-energy gas atoms. The impact of these particles on the cutting edge of the insert ensures its sharpening and reduces the radius of curvature of its cutting edges.

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