Analysis of cutting force and vibration when milling hardened steel

Abstract

Micro milling is a widely used manufacturing method. The main purpose of this study is to analyze the cutting forces in corrosion-resistant, heat-resistant steel 14Kh17N2. Studies of the full factorial experiment on the processing of steel 14Kh17N2 were carried out using a micro end mill with AlTiN coating. New mathematical models of cutting force and axial force have been developed that are adequately able to predict and optimize the forces acting on the cutting tool. Graphs have been obtained for calculating the minimum required feed per tooth and depth of cut, at which maximum cutting forces and axial forces are provided, which makes it possible to increase the durability of the cutting tool during microfilming. The obtained mathematical models describe the obtained experimental data with 90% or more accuracy.