Abstract

The main goal of this article is to study the effects of tool nose radius on some performances in turning process. An analytical approach is developed and adapted for cutting with round inserts or when only the round edge was engaged in the metal. The uncut chip area is evaluated as function to tool nose radius and discretized into some elements which are defined by their average uncut chip thickness and elementary edge direction angle. Cutting edge radius is considered and minimum uncut chip thickness is evaluated for each element. Hence, two mechanisms are studied in relation to the minimum uncut chip thickness: cutting and plowing. Effects of tool nose and cutting edge radii on cutting force components, tool/chip interface temperature, specific cutting energy, tool/chip contact length and chip thickness are investigated. Good agreement was found between experiments and predictive cutting forces when turning stainless steel.

摘要

本文的主要目的是研究刀尖半径对车削过程中某些性能的影响。开发了一种分析方法，适用于用圆形刀片或仅将圆形边缘接合到金属中时进行切削。未切削切屑区域根据刀尖半径进行评估，并离散化为一些元素，这些元素由其平均未切削切屑厚度和基本边缘方向角定义。考虑切削刃半径，并评估每个元素的最小未切削切屑厚度。因此，针对最小未切屑厚度，研究了两种机理：切屑和刨削。研究了刀尖和切削刃半径对切削力分量，刀具/切屑界面温度，比切削能量，刀具/切屑接触长度和切屑厚度的影响。