Advances in burnishing technology

Slavov, Stoyan; Dimitrov, D. M.; Konsulova-Bakalova, Mariya

doi:10.1016/b978-0-12-817452-4.00002-6

Cited by 5 publications

(7 citation statements)

References 18 publications

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“…The deforming force was set to 700 N, the feed rate was set to 300 mm/min, and the bearing balls with diameters of 14 mm and 22 mm were used as deforming elements (see Figure 6a). The toolpaths were calculated and converted into NC code using the corresponding methodology for flat surfaces [5].…”

Section: Methodology For Testing the Developed Algorithmmentioning

confidence: 99%

“…Ball burnishing (BB) is a finishing process in which a hard ball of known diameter is pressed firmly against the machined surface, causing plastic deformation (when cold) to occur in the surface layer of the material [3]. When the deform tool follows a complex toolpath trajectory, which occurs as it moves during the BB-operation performed on a CNC lathe or milling machines [4,5], specific RR patterns are imprinted onto the burnished surface. As can be seen in Figure 1a, the areal topography of fully-RR BB-operation is a pattern of comparatively regularly spaced "dimples", which are created upon the crossing of the plastically deformed traces inscribed using the deform tool.…”

Section: Introductionmentioning

confidence: 99%

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An Approach for 3D Modeling of the Regular Relief Surface Topography Formed by a Ball Burnishing Process Using 2D Images and Measured Profilograms

Slavov,

Van,

Dimitrov

et al. 2023

Sensors

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Advanced in the present paper is an innovative approach for three-dimensional modeling of the regular relief topography formed via a ball burnishing process. The proposed methodology involves capturing a greyscale image of and profile measuring the surface topography in two perpendicular directions using a stylus method. A specially developed algorithm further identifies the best match between the measured profile segment and a row or column from the captured topography image by carrying out a signal correlation assessment based on an appropriate similarity metric. To ensure accurate scaling, the image pixel grey levels are scaled with a factor calculated as being the larger ratio between the ultimate heights of the measured profilograms and the more perfectly matched image row/column. Nine different similarity metrics were tested to determine the best performing model. The developed approach was evaluated for eight distinct types of fully and partially regular reliefs, and the results reveal that the best-scaled 3D topography models are produced for the fully regular reliefs with much greater heights. Following a thorough analysis of the results obtained, at the end of the paper, we draw some conclusions and discuss potential future work.

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Section: Methodology For Testing the Developed Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Approach for 3D Modeling of the Regular Relief Surface Topography Formed by a Ball Burnishing Process Using 2D Images and Measured Profilograms

Slavov,

Van,

Dimitrov

et al. 2023

Sensors

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“…Nowadays, similar complex toolpaths can be mathematically calculated by using CAD-CAM and appropriate algorithms [ 34 , 35 ]. Then, employing the ability of the contemporary CNC-machine tools to interpolate two (or more) driven axes, they can be performed without needing to use any enforced oscillations of the ball tool [ 36 ]. However, the increased length of the toolpaths when processing RMRs by using BB is considered as one of the drawbacks from an operation performance perspective.…”

Section: Introductionmentioning

confidence: 99%

Research of the Ball Burnishing Impact over Cold-Rolled Sheets of AISI 304 Steel Fatigue Life Considering Their Anisotropy

Slavov,

Dimitrov,

Konsulova-Bakalova

et al. 2023

Materials

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The present work focusses on the research of the plastic deformation accumulated effect obtained after two different plastic deformation treatments, over the fatigue life of AISI 304 austenitic stainless steel. The research is focused on ball burnishing as a finishing process to form specific, so-called “regular micro-reliefs” (RMRs) on a pre-rolled stainless-steel sheet. RMRs are formed using a CNC (Computerized Numerically Controlled) milling machine and toolpaths with the shortest unfolded length, generated by an improved algorithm, based on the Euclidean Distance calculation. The effect of the predominant tool trajectory direction during the ball burnishing process (which can be coinciding or transverse with the rolling direction), the magnitude of applied deforming force, and feed-rate is subjected to evaluation using Bayesian rule analyses of experimentally obtained results for the fatigue life of AISI 304 steel. The obtained results give us reason to conclude that the fatigue life of researched steel is increased when directions of pre-rolled plastic deformation and the tool movement during ball burnishing are coincident. It also been found that the magnitude of deforming force has a stronger impact over the fatigue life, than the feed-rate of the ball tool.

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“…To create RMRs using forced vibration-free technology, CNC milling machines can be used. In Slavov et al [13], technology basics are described in detail, and its application for different surfaces was demonstrated. Moreover, the methodology that allows for determining the influence of ball-burnishing regime parameters on the geometric parameters of the RMR elements formed on different surfaces types, such as flat, cylindrical, and shaped has been presented.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Some Functional Properties of Surfaces with Partially Regular Microreliefs Formed by Ball-Burnishing

Dzyura,

Maruschak,

Slavov

et al. 2023

Machines

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In the present work, functional properties of three different types of regular microreliefs, formed by ball burnishing process on flat surfaces are evaluated. For their estimation, heights and material ratio curve’s criteria were used, according to the international standard ISO 21920-2:2021. The influence of the regular relief’s type and ball burnishing process parameters on the surface functional properties were investigated using full factors experimental design. Based on the obtained results, statistical models were derived that describe the dependencies between the topography characteristics and the regular reliefs’ types and regime parameters of the ball burnishing process. Based on the obtained results, several conclusions have been formulated about the applicability of these standardized methods and criteria for evaluating the functional characteristics of the different types of regular reliefs at the end of the work.

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Advances in burnishing technology

Cited by 5 publications

References 18 publications

An Approach for 3D Modeling of the Regular Relief Surface Topography Formed by a Ball Burnishing Process Using 2D Images and Measured Profilograms

An Approach for 3D Modeling of the Regular Relief Surface Topography Formed by a Ball Burnishing Process Using 2D Images and Measured Profilograms

Research of the Ball Burnishing Impact over Cold-Rolled Sheets of AISI 304 Steel Fatigue Life Considering Their Anisotropy

Evaluating Some Functional Properties of Surfaces with Partially Regular Microreliefs Formed by Ball-Burnishing

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