Research on Workability of Tool Cutters Working under Conditions of Shockless Loads and Friction

Abstract:

The paper deals with hard cutters of drill bits for drilling rocks. The research on geometry of hard alloy and steel cutters of bits that work either under conditions of shockless loads was carried out in this work. The rationale of tungsten carbide and cobalt composition according to their hardness and robustness is provided. Different alloys were suggested to be used for tools working either under conditions of shockless loads or under shock loads for drilling rocks of high hardness. The rock deformation process was identified to occur by cutting and shearing forces. The highest influence on the cutting process is exerted by the acuity angle and back rake angle. Peculiarities of work of cutters with positive, negative and neutral back rake angles were determined as part of the main research. The dependence of penetration depth on the back rake angle of the cutter was obtained. Indicators of wearing identified in the research are including the type and properties of interacting surfaces characterized by the roughness of cutting bit surface, the hardness of materials in contact zone, friction mode that depends on unit pressure, movement rate, the nature of load application, and the rate of interaction of working parts of bit.

• Periodical: Materials Science Forum (Volume 994)
• Pages: 19-27
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.994.19
• Online since: May 2020
• Authors: T.N. Ivanova*, Ivan Zajačko, Miroslav Císar, Aleksandr Ivanovich Korshunov
• Keywords: Back Rake Angle, Bit, Cutter, Hard Alloy, Lip Angle, Penetration Depth, Rock, Unit Power, Wear, Wear Rate

References

[1] А.N. Popov, A.I. Spivak, T.O. Akbulatov, et all. Under the general editorship of A.I. Spivak, Technology of drilling oil and gas wells / - M.: OOO Nedra-Business Center,, p.509.

[2] O.V. Zakharov, A.F. Balaev and A.V. Kochetkov, Modeling Optimal Path of Touch Sensor of Coordinate Measuring Machine Based on Traveling Salesman Problem Solution. Procedia Engineering. 2017. Vol. 206, Pp. 1458-1463.

DOI: 10.1016/j.proeng.2017.10.661

[3] T.N. Ivanova, Features of the use of carbide tools, working in conditions of unstressed loads // Scientific and Technical Bulletin of the Volga region. ą 8 2018 - Kazan: Volga Scientific and Technical Bulletin, 2018. p.18 – 21.

DOI: 10.24153/2079-5920-2018-8-3

[4] M.N. Baranov, P. Božek, V. Prajová , T.N. Ivanova , D.N. Novokshonov, A.I. Korshunov, Constructing and calculating of multistage sucker rod string according to reduced stress. Acta Montanistica Slovaca Volume 22 (2017), number 2, 107-115.

[5] T.N. Ivanova, A.I. Korshunov, P.M. Zavialov, Influence of process fluids properties on component surface convective heat emission MEACS 2017 IOP Publishing IOP Conf. Series: Materials Science and Engineering 327 (2018) 022051.

DOI: 10.1088/1757-899x/327/2/022051

[6] J. Jozwik, I. Kuric, Analysis of Milling Process of Sintered Carbide Workpieces. In: IEEE 6th International Conference on Industrial Engineering and Applications, ICIEA 2019, B.m.: Institute of Electrical and Electronics Engineers Inc., s. 91–97. ISBN 9781728108513.

DOI: 10.1109/iea.2019.8714808

[7] T. Dodok, N. Čuboňová, D. Wiecek, Optimization of machining processes preparation with usage of Strategy Manager. In: MATEC Web of Conferences. B.m.: EDP Sciences.

DOI: 10.1051/matecconf/201824402004

[8] J. Tlusty, Z. Masood, Chipping and breakage of carbide tools. Journal of Manufacturing Science and Engineering, Transactions of the ASME, ISSN 15288935.