Experimental studies and FEM simulation of helical-shaped deep hole twist drills

Özkaya, E.1, a; Michel, S.1, b; Biermann, D.1, c

1)
Institut für Spanende Fertigung, Technische Universität Dortmund, Baroper Str. 303, 44227 Dortmund

a) oezkaya@isf.de; b) michel@isf.de; c) biermann@isf.de

Kurzfassung

This study investigates the chip formation in drilling of AISl 316L stainless steel using TiAIN coated helical-shaped deep hole twist drills. The aim of this research is to determine suitable cutting parameters with a focus on favourable chip formation, to achieve a better process stability. The experimental investigations were conducted with varying cutting speed, feed rate and cooling lubricant pressure, in stages that were based on the recommendations of the tool manufacturer. In addition to the experimental tests, the mechanical loads and chip formation were simulated with the aim of providing a basis for the simulative development of the tool shape and the cutting parameters. With mathematical methods, a geometrical kinematic imprint, in accordance to the axial feed force of the helical-shaped deep hole twist drill, was implemented into the three-dimensional workpiece model. Based on the experimental results, which show that the chip shape has a great dependence on the feed rate, which in turn strongly affects the feed force and the drilling torque suitable cutting parameters were chosen for the simulation. The simulation results were validated with the experimental data and show a good agreement.

Schlüsselwörter

3D FEM chip formation simulation, helical-shaped deep hole twist drills, AISl 316L

Veröffentlichung

Production Engineering Research and Development, (2018), S. 11-23, ISSN 0944-6524 , doi: 10.1007/s11740-017-0779-7