DEFLECTED MODE OF HARD-ALLOY CUTTING ELEMENTS AT DIAMOND SHARPENING


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Abstract

The paper shows the influence of the technology forming the cutting surfaces and blades of the tools on the cutting process and tool wear during operation, and the quality of the processed products. The importance of this problem is emphasized for sharpening tools made of composite materials when a brittle fracture of the tool material occurs under the influence of cutting forces. The authors communicate the necessity a detailed study of deflected mode of the cutting edge and surfaces near it during formation (sharpening) of a tool with a geometry specific for the processing of non-metallic composite materials. The paper considers the questions of shaping the quality cutting blade of a tool made of high-strength materials in diamond machining. Initial and boundary conditions for research are presented as well as methodology for creation of a computational model of deflected mode in the sharpened plate. To research the formation of the deflected mode in the sharpened plate made of hard alloy, there has been used a computational model developed with account for mechanics of the damaged environment. The computational model has been implemented on the example of carbide cutting elements of the brand VK6 (WC + Co) having a specific geometry typical for a tool used for processing the items made of non-metallic composite materials. Evaluation of the test parameters in various combinations of cutting force, velocity and temperature has been performed. Sharpening parameters and terms that ensure a satisfactory condition of the cutting tools blade with carbide cutting elements are determined. Such requirements can be met by combined methods of electro-diamond machining: diamond grinding with continuous electrochemical dressing of the diamond wheel surface; electrochemical diamond grinding; a mixed method which combines electrochemical diamond grinding with simultaneous electrochemical dressing of the diamond wheel surface.

About the authors

Dmitry Vladimirovich Lobanov

Bratsk State University, Bratsk

Author for correspondence.
Email: mf_nauka@brstu.ru

Doctor of Sciences (Engineering), Professor of Chair “Mechanical Engineering”

Россия

Alexsander Sergeevich Yanyushkin

Bratsk State University, Bratsk

Email: yanyushkin@brstu.ru

Doctor of Sciences (Engineering), Professor, Head of Chair “Mechanical Engineering”

Россия

Pavel Vladimirovich Arkhipov

Bratsk State University, Bratsk

Email: pavded@yandex.ru

Ph.D. (Engineering), assistant professor of Chair “Mechanical Engineering”

Россия

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