Progressive Strategy of Milling by means of Tool Axis Inclination Angle

Authors: Sadílek M., Čep R.

Abstract:

This work deals with problems of tool axis inclination angles in ball-end milling. Tool axis inclination angle contributes to improvement of functional surface properties (surface integrity - surface roughness, residual stress, micro hardness, etc.), decreasing cutting forces and improving production. By milling with ball-end milling tool, using standard way of cutting, when work piece and cutting tool contain right angle, we have zero cutting speed on edge. At this point cutting tool only pushes material into the work piece. Here we can observe the following undesirable effects - chip contraction, increasing of cutting temperature, increasing vibrations or creation of built-up edge. These effects have negative results – low quality of surface and decreasing of tool life (in the worse case even it is pinching out). These effects can be eliminated with the tilt of cutting tool or tilt of work piece.

Keywords: CAD/CAM system, tool axis inclination angle, ballend milling, surface roughness, cutting forces.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1082915

References:

[1] Neslu┼ían, M., Cz├ín, A., Župrel, U. Analyse of Heat Distribution when Grinding of Titanium Alloy VT 9 and its Relation to Residual Stresses, STROJNI┼áKI VESTNIK Journal of Mechanical Engineering, ISSN 0039-2480, vol.48 2002 no.10, Ljubljana, Slovenija, p. 557-564.
[2] Pramet Tools. Tools for copy milling die & mould making tools, Catalog Pramet Tools, 2004.
[3] Sadílek, M. Increasing of the surface quality by means of the tilt of milling cutter in ball-end milling. Textbook of lectures of International Science Conference at 55th Anniversary Foundation of Faculty of Mechanical Engineering. - section no. 7, Engineering Technology - Machining. VŠB - TU Ostrava, 2005, pp. 29, ISBN 80-248-0895-1.
[4] Ochodek, Vl., Styskala, V. Introduction to micromagnetic technique. In. Transactions of the VŠB Technical University of Ostrava. Mechanical series. Vol. XLVI, 1/2000, pp.133-138.
[5] Neslu┼ían, M.; Turek, S.; Brychta, J.; ─îep, R.; Taba─ìek, M. Experiment├ílne met├│dy v trieskovom obr├íban├¡. Žilina: EDIS Žilina, 2007, ISBN 978-80-8070-711-8. , pp.343.
[6] Sadílek, M.; Čep R.; Otáhal, D. Tilt of milling cuter effect in Milling. Technical conference - Milling IV. Brno, University of Technology, Faculty of Mechanical Engineering, 2007, pp. 13 - 18. ISBN 80-214- 3239-X.
[7] Sadílek, M.; Nováková, J. Functional surface properties of free form surfaces milling. Scientific Bulletin 2008, North University of Maia Mare, Romania, 2008, ISSN 1224-3264.
[8] Otáhal, D. Progressive methods of milling and their influence over cutting process, Ostrava: Department of Machining and Assembly, Faculty of Mechanical Engineering, Technical University of Ostrava, 2007, p. 113.
[9] Hatala, M. Technological process simulation. Prešov: FVT TU, 2007. p. 85. ISBN 978-80-8073-756-6.
[10] Houdek, J.; Kouřil, K. New generation of cutting inserts. MM pr┼»myslové spektrum, 2000, no. 9, pp. 38 - 40.