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Shaping the Topography of the Active Surface of a Ceramic Grinding Wheel with a Stationary Multi-Point Diamond Dresser

Dębkowski Ryszard, Gołąbczak Marcin

Advances in Science and Technology. Research Journal

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2024

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Vol. 18, no 2

266--283

EN

The paper presents issues related to shaping the topography of the grinding wheel as a result of the impact of a stationary multipoint diamond dresser. The result of the dressing process with diamond multipoint dressers is influenced by the dressing feed, the effective width of the individual diamonds and the distance between the diamonds measured along the dressing feed direction. The paper presents simulation results the influence of these parameters on the multiplicity of contact between generatrix of the flat grinding wheel type 1 and the dressing diamonds. The results of the simulation showed that, depending on these parameters, areas with no contact with diamonds and areas with different multiplicity of contact may form on the surface of the grinding wheel. This means that the active surface roughness of the grinding wheel may not be uniform. Two indexes were proposed to enable supervision of the dressing process using stationary multi-point dressers. The first index (k1) characterizes the average multiplicity of contact between the diamonds and the grinding wheel along its generatrix, and the second (k2) the possibility of forming a spiral ridge on the grinding wheel surface due to the lack of contact between this part of the grinding wheel and the diamonds. The work analyzes the changes in the indexes values as a function of the dressing feed rate and the active width of diamonds for two basic types of diamond distribution on the working surface of the dresser, i.e. uniform and irregular spacing. The study presented the results of evaluating the topography of the flat aluminum oxide vitrified grinding wheel type 1 subjected to dressing with various values of indices k1 and k2. The assessment was carried out on the basis two-sample Kolmogorov-Smirnov test and statistical analysis of parameters for evaluating the microgeometry of the grinding wheel circumferential profile, i.e. the depth of active cutting edges and the undeformed chips thickness. The analysis confirmed the lack of homogeneity of the surface topography of the grinding wheel formed with a stationary multipoint dresser and the purposefulness of using the k1 and k2 indexes.

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Zastosowanie analizy map i motywów do oceny zużycia ziaren ściernych ściernicy jednowarstwowej

Bazan A., Kawalec A., Chmielik I.

Mechanik

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2018

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R. 91, nr 12

1120--1123

PL

W artykule przedstawiono możliwości wykorzystania programu MountainsMap Premium 7.4 do analizy ilościowej ścierniwa z cBN na czynnej powierzchni ściernicy jednowarstwowej na różnych etapach jej zużycia. Porównano dwie dostępne w tym oprogramowaniu metody rozpoznawania ziaren, tj. analizę wysp i analizę motywów.

EN

The article presents the possibilities of using the MountainsMap Premium 7.4 program in the context of quantitative analysis of cBN abrasive on the single-layer grinding wheel active surface at various stages of grinding wheel wear. Two methods of grain separation available in the above software, ie. island analysis and motif analysis, were compared.

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Metody wyodrębniania ziaren z topografii czynnej powierzchni ściernicy jednowarstwowej

Bazan A., Kawalec A.

Mechanik

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2018

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R. 91, nr 10

926--928

PL

Zaprezentowano wyniki badania metod rozpoznawania ziaren na podstawie zmierzonych danych, reprezentujących topografię jednowarstwowej ściernicy. Metody te uwzględniają informację dotyczącą wyznaczonego poziomu odcięcia (metoda Threshold) lub odnoszącą się do segmentacji wododziałowej. Ponadto zaproponowano sposób wyznaczania średniego poziomu spoiwa.

EN

The paper presents results of research concerning methods used for determining grain separation from measured data representing single-layer grinding wheel topography. The methods apply information concerning determined threshold level (Threshold method) or concerning watershed segmentation (Watershed method). A method for determining the average level of bond was also proposed.

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Ilościowy opis form zużycia jednowarstwowych ściernic z cBN, pracujących z różnymi prędkościami szlifowania

Kawalec A., Bazan A.

Mechanik

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2018

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R. 91, nr 10

803--805

PL

Zaprezentowano metodę ilościowego opisu zaobserwowanych form zużycia czynnej powierzchni ściernicy z cBN ze spoiwem nanoszonym metodą galwaniczną. Wyznaczono objętość ścierniwa, które w wyniku pracy ściernicy zostało wykruszone, wyrwane oraz zalepione. Badaniom poddano trzy ściernice pracujące z różnymi prędkościami szlifowania.

EN

The paper presents a method of quantifying the observed wear forms of electroplated cBN grinding wheel. The volume of fractured, pulled out or smeared abrasive was determined. Three grinding wheels working with different grinding speeds were tested.