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1

Use of the theory of similarity in the study of cutting tool wear

Bezyazychny V. F., Szczerek M., Nepomiluev V. V., Kiselev Z. W.

Tribologia

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2018

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nr 1

7--10

EN

The paper highlights the methods to define wear intensity of cutting tools using the theory of similarity. The dimensionless numbers of the cutting procedures, which are necessary in calculating cutting tool wear intensity, are defined with regard to the cutting conditions, cutting tool geometry, and the physico-mechanical properties of the work stock and the tool materials.

PL

W artykule przedstawiono metody określania intensywności zużywania narzędzi skrawających z wykorzystaniem teorii podobieństwa. Bezwymiarowe liczby dotyczące procesu skrawania, które są konieczne do obliczenia intensywności zużycia narzędzia tnącego, są wyznaczane w odniesieniu do warunków skrawania, geometrii narzędzia skrawającego i właściwości fizykomechanicznych materiałów obrabianych oraz materiału narzędzia.

2

The method of similarity in the study of wear resistance of machine elements

Bezyazychny V. F., Szczerek M.

Tribologia

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2017

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nr 5

5--9

EN

The paper describes methods to estimate wear rate of the surfaces machined with an edge tool, using dimensionless numbers that characterize the cutting process and the quality of the machined surface, which allowed using the ideas of the theory of similarity.

PL

Przedstawiona została metoda określenia intensywności zużycia powierzchni obrobionej narzędziem skrawającym, za pomocą kompleksów bezwymiarowych, które charakteryzują proces skrawania i jakość obrabianej powierzchni, co pozwala korzystać z teorii podobieństwa.

3

Engineering support of performance characteristics of high-reliability products parts

Bezyazychny V. F., Kozhina T. D.

Scientific Problems of Machines Operation and Maintenance

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2012

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Vol. 47, nr 2

13--23

EN

The paper deal with the methods used to assign cutting technological conditions providing the set-up parameters of surface layer quality in the cutting operation and used in the calculation estimation of the indices of product performance characteristics based on certain parameters of surface layer quality and cutting conditions. There is the necessity for critical machine parts to provide the required performance characteristics determined both through the part precision parameters and through their surface layer quality (roughness, degree and depth of cold working, and the value and sign of residual stresses). In such cases, it is necessary to provide the complex parameters that characterize the surface layer along with the specified machining accuracy. For this propose, the methods and appropriate software have been developed that enables one to define the correlation between the machining conditions and the surface layer quality parameters, including cutting accuracy, properties of the cutter and work stock materials, technological system rigidity, the part`s dimensions.

4

Computational error estimation in an edge cutting operation

Bezyazychny V. F.

Scientific Problems of Machines Operation and Maintenance

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2012

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Vol. 47, nr 2

5--12

EN

The paper describes methods of computational error estimation in an edge cutting operation including the error components conditioned by the cutting process. The existing tables of economical accuracy for machining methods do not correspond properly with the precision attained on modern equipment, including the tools and cutters applied. For this purpose, the application of calculation methods is suggested to define the cutting accuracy, and dependences are considered between the surface layer parameters that characterize the properties of the tools and cut materials and between the equipment and the cutters and cutting conditions. Therefore, there is possibility to define the combination of cutting mode elements providing the complex surface layer quality parameters: roughness height, cold working depth, and the value of residual stresses in the surface layer. The advantage of these methods in calculating the machining accuracy and the cutting conditions consists in that the cutter and work stock material properties are taken into consideration, as well as the required surface layer parameters.