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Article

The Effect of Coatings on Cutting Force in Turning of C45 Steel

1
Department of Production Machines and Equipment, Faculty of Mechanical Engineering, Czech Technical University in Prague, 128 00 Prague, Czech Republic
2
Hofmeister, s.r.o., 301 00 Plzeň, Czech Republic
*
Author to whom correspondence should be addressed.
Academic Editor: Ahalapitiya H Jayatissa
Materials 2022, 15(2), 590; https://doi.org/10.3390/ma15020590
Received: 21 December 2021 / Revised: 6 January 2022 / Accepted: 8 January 2022 / Published: 13 January 2022
This article focuses on the development of a mathematical model of a cutting force that is applicable for coated and uncoated cutting tool inserts and aims to enable more accurate calculation of the cutting force. Two common PVD coatings, AlTiN and TiAlCrN, were used. Firstly, a mathematical model of the cutting force based on the specific cutting force and cutting area is proposed. This mathematical model considers the cutting speed and coating correction factor as well as the real cutting edge geometry, i.e., it includes both the straight and rounded parts of the cutting edge. For this proposed model, material constants for C45 steel, which was machined with uncoated inserts, were obtained. Before determining an equation for a coating correction factor and implementing it into the model, experimental cutting force data for coated and uncoated inserts were compared using a paired t-test. The result was that the difference between them was statistically significant. Their percentage difference was found to be up to 4%. The correction factor equation that was obtained and implemented into the mathematical model was applied to compare the calculated and experimental data of the coated inserts, also using a paired t-test. The result was that the difference between them was insignificant. Moreover, their percentage difference was found to be up to 0.6%. View Full-Text
Keywords: turning; coating; carbon steel; modelling; cutting force turning; coating; carbon steel; modelling; cutting force
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MDPI and ACS Style

Kovalčík, J.; Mašek, P.; Malý, J.; Kožmín, P.; Syrovátka, J. The Effect of Coatings on Cutting Force in Turning of C45 Steel. Materials 2022, 15, 590. https://doi.org/10.3390/ma15020590

AMA Style

Kovalčík J, Mašek P, Malý J, Kožmín P, Syrovátka J. The Effect of Coatings on Cutting Force in Turning of C45 Steel. Materials. 2022; 15(2):590. https://doi.org/10.3390/ma15020590

Chicago/Turabian Style

Kovalčík, Jaroslav, Petr Mašek, Jan Malý, Pavel Kožmín, and Jiří Syrovátka. 2022. "The Effect of Coatings on Cutting Force in Turning of C45 Steel" Materials 15, no. 2: 590. https://doi.org/10.3390/ma15020590

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