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Comparative Study of Chip Formation in Orthogonal and Oblique Slow-Rate Machining of EN 16MnCr5 Steel

1
Faculty of manufacturing technologies with the seat in Presov, Technical University of Kosice, Sturova 31, 080 01 Presov, Slovakia
2
Faculty of Technology, UTB Tomas Bata University in Zlin, Vavreckova 275, 760 01 Zlin, Czech Republic
3
Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, 17. listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic
4
Faculty of Mechanical Engineering, West Bohemia University in Pilsen, Univerzitni 22, 301 00 Pilsen, Czech Republic
*
Author to whom correspondence should be addressed.
Metals 2019, 9(6), 698; https://doi.org/10.3390/met9060698
Received: 23 May 2019 / Revised: 15 June 2019 / Accepted: 18 June 2019 / Published: 20 June 2019
(This article belongs to the Special Issue Failure Mechanisms in Alloys)
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Abstract

In today’s unmanned productions systems, it is very important that the manufacturing processes are carried out efficiently and smoothly. Therefore, controlling chip formation becomes an essential issue to be dealt with. It can be said that the material removal from a workpiece using machining is based on the degradation of material cohesion made in a controlled manner. The aim of the study was to understand the chip formation mechanisms that can, during uncontrolled processes, result in the formation and propagation of microcracks on the machined surface and, as such, cause failure of a component during its operation. This article addresses some aspects of chip formation in the orthogonal and oblique slow-rate machining of EN 16MnCr5 steel. In order to avoid chip root deformation and its thermal influence on sample acquisition, that could cause the changes in the microstructure of material, a new reliable method for sample acquisition has been developed in this research. The results of the experiments have been statistically processed. The obtained dependencies have uncovered how the cutting tool geometry and cutting conditions influence a chip shape, temperature in cutting area, or microhardness according to Vickers in the area of shear angle. View Full-Text
Keywords: slow-rate machining; chip formation; shape; temperature; microhardness HV slow-rate machining; chip formation; shape; temperature; microhardness HV
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Monkova, K.; Monka, P.P.; Sekerakova, A.; Hruzik, L.; Burecek, A.; Urban, M. Comparative Study of Chip Formation in Orthogonal and Oblique Slow-Rate Machining of EN 16MnCr5 Steel. Metals 2019, 9, 698.

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