Evaluating Service Characteristics of Working Surfaces of Car Parts by Microgeometric Quality Parameters

Dzyura, Volodymyr; Maruschak, Pavlo; Slavov, Stoyan; Gurey, Volodymyr; Prentkovskis, Olegas

doi:10.3390/machines9120366

Cited by 5 publications

(6 citation statements)

References 19 publications

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“…In contrast to the above-mentioned methods that create a chaotic microrelief characterized by sufficiently sharp peaks of microirregularities and low ability to retain oil, the partially RMR provides for a high manufacturability of surfaces. When the partially RMR was formed on the test specimen surface (Figure 2b) (Dzyura et al 2021a(Dzyura et al , 2021b(Dzyura et al , 2021c, the surface roughness increased slightly.…”

Section: Analysis Of the Experimentally Obtained Results For The Regi...mentioning

confidence: 99%

“…The required toolpaths were elaborated by a novel algorithm, shown in Figure 1. As input parameters it uses X and Y coordinates of the toolpath characteristic points, calculated by the methodology (Dzyura et al 2021a(Dzyura et al , 2021b(Dzyura et al , 2021c. Factors are selected according to expert assessments and based on the analysis of scientific literature (Swirad, Pawlus 2021;Shnejder, Lebedinskij 1970;Bulatov et al 1997;Wos et al 2020).…”

Section: Methodsmentioning

confidence: 99%

“…As it is seen, the disk surface is covered with circular scratches (A) caused by shifting and setting of the material in these areas. Circular scratches border on less damaged areas of abrasions (B), indicating the localization of the disk wear in certain areas (Dzyura et al 2021a(Dzyura et al , 2021b(Dzyura et al , 2021c.…”

Section: Fractodiagnostics Of Cvtmentioning

confidence: 99%

“…Regardless of the fact that variable transmissions have already occupied a certain niche in car making, enhancing their reliability and manufacturability to extend their service life is an important task. There are a number of efforts for analysing the height-related roughness parameter R a (Wang et al 2010;Volchok et al 2002;Dzyura et al 2021aDzyura et al , 2021bDzyura et al , 2021c. The service characteristics of surfaces, in particular, the ability to retain oil, were investigated, using the group of R k parameters on the Abbott-Firestone diagram, based on surface profilograms of test specimens.…”

Section: Introductionmentioning

confidence: 99%

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Applying Regular Relief Onto Conical Surfaces of Continuously Variable Transmission to Enhance Its Wear Resistance

Dzyura,

Maruschak,

Slavov

et al. 2023

Transport

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While investigating the variator transmission of vehicles, the relationship between the technological and service parameters of the working surfaces of conical disks treated by technological methods was established. The service properties are proposed to be enhanced by Regular MicroReliefs (RMRs) created on such surfaces. The optimal technological processing conditions were found, which allow retaining the greatest amount of lubricant. The causes of surface defects, formed on the working surfaces of conical disks of the Continuously Variable Transmission (CVT), are systematized and classified. The wear resistance of such surfaces is proposed to be enhanced by technological methods, in particular, by forming partially RMRs on them. Their application facilitates relaxation processes on the material near to the surface, reduces shear stresses and strains, thus preventing the formation of burrs and extending the life of the conical disks of the CVT. A novel approach for obtaining the toolpaths of the deforming element, based on the so-called “Commis–Voyageur problem” algorithms, is employed in order to research the possibilities for involving that methods in toolpath generation. Dependences between the partial RMR’s formation conditions (deforming forces and feedrate) and microgeometric quality parameters are established. The latter include surface roughness, with a partially RMR applied onto the face surfaces of the test specimen (rotary body). It is found that these microreliefs enhance the ability of oil retaining in plastically deformed traces, formed over the operational surfaces, in comparison with those, that are processed by traditional cutting methods, as turning for example.

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Section: Analysis Of the Experimentally Obtained Results For The Regi...mentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Fractodiagnostics Of Cvtmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Applying Regular Relief Onto Conical Surfaces of Continuously Variable Transmission to Enhance Its Wear Resistance

Dzyura,

Maruschak,

Slavov

et al. 2023

Transport

Self Cite

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“…The use of Rk parameters to assess the surface condition to ensure lower wear and better durability of the pin-seal assembly was reported in refs. [5,6]. In ref.…”

Section: Introductionmentioning

confidence: 99%

Effect of Slide Diamond Burnishing on the Surface Layer of Valve Stems and the Durability of the Stem-Graphite Seal Friction Pair

2023

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This study analysed the condition of the surface layer of valve stems made of 317Ti steel after polishing and burnishing. Surface roughness, microhardness, and residual stress tests were carried out. The tests were carried out to determine the effect of the condition of the surface layer (especially non-standard parameters of surface roughness) of the stems on the durability of valves and to determine the possibility of obtaining a favourable state by means of sliding burnishing. Significant differences were observed in the values of the roughness parameters that determine the tribological properties of the surface, and higher surface microhardness and residual compressive stresses were obtained after burnishing. The durability of the stem-graphite seal in a reciprocating movement was tested, and the failure-free operation time of valves with burnished stems was approximately four times longer, which is the premise for recommending sliding diamond burnishing as a finishing treatment for valve stems.

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Machinability and pulse characteristics of Ti-16Al-14Nb (α/β) alloy in wire-electric discharge machining process: A surface integrity study

Veera Venkata Nagaraju,

Joseph Davidson,

Venkatesh

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part E:

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The goal of the present work is to produce the efficient cutting of Ti-16Al-14Nb (α/β) alloy through wire-electric discharge machining and contemplate the terminologies such as machining ability, surface integrity and material removing capability. For this, the experimentation has been designed by considering three process parameters, pulse-on time ( Ton), pulse-off time ( Toff) and peak current ( Ip) at three significant levels (low, high, intermediate) in L27 order designed from design of experiments. The effect of these process variables on pulse characteristics, surface roughness ( Ra), kerfwidth ( Kw) and material removal rate ( MRR) is analyzed and mathematically modeled with analysis of variance. The results state that the highest MRR (0.521, 0.51, 0.506 mm3/sec) and low surface roughness (8.91, 8.89, 8.68 µm) values are observed at the highest level (110 µs, 15 µs, 8 A). If the pulse duration is kept at low ( Ton = 40µs, Toff = 3µs), the increase in peak current from 3 A to 8 A leads to a 64.54% increase in MRR and a 52.9% increase in Ra values. ANOVA results stated that Ton has contributed 20.4%, 35.8% and 19.3%, and Ip has contributed 43.1%, 30.5% and 46.6% influence on MRR, Kw and Ra respectively. The voltage–current characteristics studies confirmed that the strong intense pulses at a higher peak current (8 A) resulted in the increased MRR (0.521 mm3/sec) and Ra (8.43 µm) leading to the formation of swages and ridges. The surface integrity analysis derived from Abbott–Firestone curve agreed that the lowest level has shown better skewness ( Rsk = −0.274) and at highest level showed a larger deviation in skewness ( Rsk = +2.672) signifies that higher asymmetry (poor) of the surface.

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Evaluating Service Characteristics of Working Surfaces of Car Parts by Microgeometric Quality Parameters

Cited by 5 publications

References 19 publications

Applying Regular Relief Onto Conical Surfaces of Continuously Variable Transmission to Enhance Its Wear Resistance

Applying Regular Relief Onto Conical Surfaces of Continuously Variable Transmission to Enhance Its Wear Resistance

Effect of Slide Diamond Burnishing on the Surface Layer of Valve Stems and the Durability of the Stem-Graphite Seal Friction Pair

Machinability and pulse characteristics of Ti-16Al-14Nb (α/β) alloy in wire-electric discharge machining process: A surface integrity study

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