Model of the Ultimate Stress State of the Coated Tool Cutter Material

Aleksei Osinnii,Nataliya Kapustina,Anna Okun’Kova,Jury Bublikov,Anatoli Chigarev

doi:10.1051/epjconf/202124804009

Aleksei Osinnii, Nataliya Kapustina + Show 3 more

Open Access

https://doi.org/10.1051/epjconf/202124804009

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Abstract

The article proposes a model of the ultimate stress state of the material of the coated tool cutter. It is found that with an increase in the fracture toughness of a tool in connection with the material ductility the machining accuracy deteriorates due to arising elastic-plastic vibrations of the tool cutter. In case when no ultimate stress state is reached, that is, a tool operates in the elastic region, then an alternating stress distribution diagram is realized for the tool cutter at the beam approximation. Therefore, in addition to the frictional vibrations, arising from the interaction between the tool cutter and a workpiece, the elastic vibrations can arise, which affects the machining accuracy and the service life of the coated tool cutter. The use of coatings makes it possible not only to increase the wear resistance of cutting tools, but also to transform the stress distribution diagrams of the normal σN and tangential τγ contact stresses acting on the rake face of the cutting tool. In particular, it is possible to control the length of the total contact area between the chips and the tool rake face.

Highlights

The study of the ultimate stress state of a tool cutter is an important task aimed at predicting the service life of a coated tool cutter and its fracture pattern [1]
With an increase in the fracture toughness of a tool through the material ductility the machining accuracy deteriorates due to the arising elastic-plastic vibrations of the tool cutter
When no ultimate stress state is reached, that is, a cutting tool operates in the elastic region, according to Fig. 6, an alternating stress distribution diagram is realized for the tool cutter at the beam approximation

Summary

Introduction

The study of the ultimate stress state of a tool cutter is an important task aimed at predicting the service life of a coated tool cutter and its fracture pattern [1]. The deposition of wear-resistant coatings is one of the prevailing methods for improving the performance properties of cutting tools [2, 3]. The probabilistic methods that take into account the stochastic nature of the deposition process are often used to simulate the process of deposition of coatings on metal-cutting tools [25-31]. The wear-resistant coatings of new generation are able to change significantly the cutting conditions, and this fact should be taken into account during the modeling of the state of a tool cutter [48-70]. The aim of this study is to create a model of the ultimate stress state of the material of the coated tool cutter, taking into account the stochastic nature of loading during the cutting process and the effect of the multilayered wearresistant coatings of new generation

Objectives

Findings

Conclusion