Abstract
The results of the finite element modeling and analysis of thermomechanical phenomena arising from the of cutter self-excitation in perpendicular free cutting of metals are given. It is shown that the cause of self-excitation of self-oscillations is the nonlinear temperature dependence of the blank’s mechanical characteristics. Modeling detected the effects of self-excitation and the establishment of self-oscillations, revealed the conditions for the propensity to the occurrence of self-oscillations for various materials.
Highlights
A thermomechanical model of self-excitations during cutting was proposed in [1]. The basis of this model is the assumption that the occurrence of self-oscillations arises because the mechanical characteristics of the material, its elastic modulus, yield point, and strength, and the cutting force depend on the temperature
The thermomechanical model proposed in [1] gives a visual qualitative description and understanding of the phenomenon of the thermomechanical self-excitation
This paper presents the results of finite element modeling of thermomechanical self-oscillations for perpendicular free cutting
Summary
A thermomechanical model of self-excitations during cutting was proposed in [1]. The basis of this model is the assumption that the occurrence of self-oscillations arises because the mechanical characteristics of the material, its elastic modulus, yield point, and strength, and the cutting force depend on the temperature. This paper presents the results of finite element modeling of thermomechanical self-oscillations for perpendicular free cutting. Formation of a finite element model of a perpendicular free cutting process. AISI 1045 steel was chosen as the material for the blank The properties of this steel required for simulation depending on the temperature. The process of friction of the tool’s front surface with the chip and the friction of its rear surface with the blank is one of the insufficiently studied processes that accompany the cutting process
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