Abstract
In this article, the technique and research results on creation of surface layer mechanical conditions parameters at orthogonal cutting are presented. Stress tensor, strain rate tensor and general mechanical condition factors distribution along flow lines were obtained. Distributions of stresses, strain rates, mean normal stress and stress state index along flow lines consist of three steps of quasi-monotonous deformation. On every step there is a monotonous increasing or decreasing of these parameters. It is demonstrated that creation of surface layer mechanical condition parameters in metal cutting and surface plastic deformation methods follow common patterns. Experimental research results confirmed the validity of proposed analytical models for stressing programs in orthogonal metal cutting.
Highlights
Metal cutting is one of the most widely used processes in machine-building industry
It is evident that the distribution of stresses within the boundaries of deformation site (DS) is quite complex
Analysis of above relationships shows that maximum magnitude of stresses and strain rates occurs at the tool point area
Summary
Metal cutting is one of the most widely used processes in machine-building industry. Assigned cutting modes enable to provide specified dimensional accuracy and surface integrity of components. Metal undergoes severe plastic deformation with high strain rates in restricted areas. Orthogonal cutting is known to be the most commonly used model to make various geometric and boundary conditions more simple. Metal cutting processes feature complex stress distribution and strain accumulation on chip-tool boundary and in surface layer. A number of numerical simulations and research works have been carried out on the machining of metals
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