Influence of Diamond Grit Concentration on Diamond Cutting Wheel Machining Efficiency

The mechanisms of contact interaction of diamond-containing composite materials (diamond cutting disk segments) during cutting of steel and concrete have been studied by electron scanning microscopy. It has been established that the increase in the cutting ability of the diamond cutting disc when the concentration of diamond grains in the diamond-containing composite material of the segments increases is associated not only with an increase in the number of diamond grains on the segment surface, but also with a change in the mechanism of contact interaction between the diamond-containing composition and the material being cut. It was found that the increase in the size of grains, even with a small change in the concentration (from 17.5 to 25 relative %) in the segment changes the cutting ability of the tool. Diamond grains reduce the contribution of frictional interaction between the bond and the processed material, and their higher concentration in the segment leads to a decrease in impact loads on the grain. When cutting a steel tube, an increase in the con-centration of diamond grains reduces the frictional component of the contact interaction of diamond-contain-ing composite material with steel, reducing the thermal effect of frictional interaction, and the increase in their size contributes to the increase in the strength of their fixation by the bond, leveling the influence of the thermal effect of frictional interaction of the bond with steel and the increase in its temperature in the zone of frictional contact.

1. Konstanty J. Powder Metallurgy Diamond Tools. — Oxford: Elsevier. — 2005

2. Aktualnye problemy prochnosti. Glava 30. Sov-remennoe sostoyanie teorii rezaniya betona i zhele-zobetona almaznym instrumentom // A.V. Alifanov [i dr.]; pod red. Rubanika. — Minsk: IVC Min-fina. — 2022, 380—390 (in Russian)

3. Loladze N.T., Cerodze M.P., Dzidzishvili Yu.G., Avalishvili Z.A. Issledovanie vzaimosvyazi proiz-voditelnosti i stojkosti almaznyh sverl ot razlichnyh faktorov // Porodorazrushayushij metalloobra-batyvayushij instrument – tehnika, tehnologiya ego izgotovleniya i primeneniya: XII mezhdunar. konf. (Krym, 18 sentyabrya – 24 sentyabrya 2011). — Kiev: Izd-vo ISM im. V.N. Bakulya NAN Ukrajny. — 2011, 537—541 (in Russian)

4. valishvili Z., Tserodze M., Loladze N. (Georgia) The influence of some physical and mechanical properties of metallic binder on the performance of the diamond tool // European research. — 2015, № 10(11), 46—53 (in Russian)

5. Babich V.E. Problemy sozdaniya specializi-rovan-nogo i universalnogo almazno-abrazivnogo instru-menta // Sovremennye metody i tehnologii soz-daniya i obrabotki materialov: sb. nauchnyh trudov. V 3 kn. Kn. 2. Tehnologii i oborudovanie mehanich-eskoj i fiziko-tehnicheskoj obrabotki / redkol.: V.G. Zalesskij (gl. red.) [i dr.]. — Minsk: FTI NAN Belarusi. — 2020, 6—15 (in Russian)

6. Instrumenty iz sverhtverdyh materialov v tehnologiyah abrazivnoj i fiziko-tehnicheskoj obrabotki: monografiya / V.I. Lavrinenko, V.Yu. Solod. — Kamenskoe: DGTU. — 2016 (in Russian)

7. Wang C.Y. and Clausen R. Marble Cutting with Single Point Cutting Tool and Diamond Segments // International Journal of Machine Tools and Manu-facture. — 2002 (42), no. 9, 1045—1054

8. Denkena B. und Tönshoff H.K. Spanen: Grundla-gen. 3., bearb. u. erw. Aufl. — Berlin Heidelberg: Springer-Verlag. — 2011

9. Ersoy A., Buyuksagis S., and Atici U. Wear Char-acteristics of Circular Diamond Saws in the Cutting of Different Hard and Abrasive Rocks // Wear. — 2005 (258), 1422—1436

10. Denkena B., Becker J.C., and Gierse A. Examina-tion of Basic Separation Mechanisms for Machining Concrete and Stone // Production Engineering. Re-search and Development. — 2004 (11), no. 2, 23—28