What is it about?
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.
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Why is it important?
With the simulation the chip formation during helical deep hole drilling of AlSI 316L can be described with high detail and accuracy for the first time. This opens up the possibility to simulate the effect of new cuttin edge geometries and to optimize cutting parameters.
Read the Original
This page is a summary of: Experimental studies and FEM simulation of helical-shaped deep hole twist drills, Production Engineering, December 2017, Springer Science + Business Media, DOI: 10.1007/s11740-017-0779-7.
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