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Название Effect of relief angle and strengthening chamfer on durability in ceramic thread cutters
DOI 10.17580/tsm.2018.12.13
Автор Yamnikov A. S., Yamnikova О. А., Chuprikov А. О., Kharkov A. I.
Информация об авторе

Tula State University, Tula, Russia:

A. S. Yamnikov, Professor, e-mail: Yamnikovas@mail.ru

A. I. Kharkov, Postgraduate Student


SPLAV Research & Production Association, Tula, Russia:
О. А. Yamnikova, Professor, Category I Expert


Tulsky Oruzheiny Zavod, Tula, Russia:
А. О. Chuprikov, Head of Department


Today’s manufacturers are ready to offer a wide selection of changeable multifaceted cutters made of hard metal ceramic alloys and designed for threading blanks made of high-strength alloys. The recent decades have seen an increasing scope of applications for changeable multi-faceted ceramic cutters, which are extremely hard and have high red hardness characteristics at high temperatures occurring in the cutting area. The application of ceramic cutters is limited due to their brittleness and insufficient bending strength. An experimental study was conducted to understand the effect of relief angles along the side and top blades; the size and the slope of the strengthening chamfer around the cutting blade on the wear resistance of the VOK 60 ceramic cutters operated as advised by the manufacturer and verified by field trials. A wear of 0.2 mm along the rear surface of the thread cutter was taken for the wear criterion. The face of the thread cutter (in particular, the width of the crater and the band between the cutting edge and the crater) was also monitored for wear. During the experiment, the relief angle on the top and side blades was increased from 2 to 10 degrees with a 2-degree step. The authors found that smaller relief angles ( α = 2 degrees) are associated with a higher wear intensity along the rear surface, while the relief angles bigger than 6 degrees can lead to cutting edge chipping. The recommendation is to use blades with relief angles in the range of 5 degrees ± 30'. The authors also looked at the relevance of practices employed by Sandvik Coromant who advise using a strengthening chamfer with a negative rake angle. Because the surfaces that need to be processed are quite large, the threading operation was substituted with a longitudinal turning operation, with the shape of shavings being very similar to that resultant from thread cutting. A 20-degree angle and a 0.2 mm wide chamfer should be considered an optimum combination in terms of achieving maximum durability.

Ключевые слова Threading hardened workpieces, ceramic cutters, durability, relief angles, strengthening chamfer, negative rake angle, chamfer width
Библиографический список

1. Bobrov V. F. Multi-pass cutting of fastener threads with a cutter. Moscow : Mashinostroenie, 1982. 104 p.
2. Ivanov V. V., Pryazhnikova A. A. Capabilities of new domestically made hard-alloy cutters in turning application. Izvestiya Tula State University. Tekhnicheskie nauki. 2017. Iss. 8. Part 1. pp. 49–57.
3. Ivanov V. V., Pryazhnikova A. A. Influence of the vertex angle of multifaceted hard-alloy plates on the speed in turning. Russian Engineering Research. 2013. Vol. 33. Iss. 1. pp. 46, 47.
4. Ivanov V. V., Sorokin E. V. Analysing the cutting properties of the H05 hard alloy produced by KZTS. Izvestiya Tula State University. Tekhnicheskie nauki. 2012. No. 1. pp. 371–373.
5. Yamnikov А. S., Chuprikov A. O., Kharkov A. I. Extending Tool Life in Buttress-Thread Cutting on High-Strength Blanks. Russian Engineering Research. 2015. Vol. 35. No. 12. pp. 953–956.
6. Rehorn A. G., Jin J., Orban P. E. State-of-the-art methods and results in tool condition monitoring : a review. International Journal of Advanced Manufacturing Technology. 2005. Vol. 26. pp. 693–710.
7. Byrne G., Dornfeld D., Inasaki I., Kettele G., Konig W., Teti R. Tool condition monitoring (TCM) — The status of research and industrial application. Annals of the CIRP. 1995. Vol. 44, Iss. 2. pp. 541–567.
8. Ivanov V. V., Pryazhnikova A. A. Wear patterns of changeable multi-faceted cutters with different vertex angles and a differently shaped face in fine turning. Izvestiya Tula State University. Tekhnicheskie nauki. 2012. No. 1. pp. 354–360.
9. Yeo S. H., Khoo L. P., Neo S. S. Tool condition monitoring using reflectance of chip surface and neural network. Journal of Intelligent Manufacturing. 2000. Vol. 11. pp. 507–514.
10. Astakhov V. P. The principle of applying the lowest fracture energy of plastic strain as a basis for understanding and optimizing the metal cutting processes. Izvestiya Tula State University. Tekhnicheskie nauki. 2016. No. 8. Part 1. pp. 197– 150.
11. Astakhov V. P. Machinability: existing and advanced concepts, chapter 1. Machinability of advanced materials. Ed. J. P. Davim. London : Waley, 2014. pp. 1–56.
12. Atkins A. G. Modelling metal cutting using modern ductile fracture mechanics: quantitative explanations for some longstanding problems. International Journal of Mechanical Science. 2003. Vol. 43. pp. 373–396.
13. Limido J., Espinosa C., Salaün M., Lacome J. L. SPH method applied to high speed cutting modeling. International Journal of Mechanical Sciences. 2007. Vol. 7. pp. 898–908.
14. Bagci E. 3-D numerical analysis of orthogonal cutting process via mesh-free method. International Journal of the Physical Sciences. 2011. Vol. 6. pp. 1267–1282.
15. Sandvik Coromant catalogue. Available at: http://www.sandvik.coromant.com (Accessed: 31.05.2018)
16. Vargus. Catalogue of thread turning tools. Available at: http://www.its77.ru/katalogi-proizvoditelej/vargus-instrument-rezbonareznoj/vargus.html (Accessed: 31.05.2018)
17. Zavod Tekhnicheskoy Keramiki. Available at: http://www.techceram.ru (Accessed: 31.05.2018)
18. Yamnikov A. S., Chuprikov A. O. Improving the efficiency of the use of cutting ceramics for high-strength material billets threading. Tsvetnye Metally. 2017. No. 12. pp. 85–89.
19. Yamnikov A. S., Chuprikov A. O., Kharkov A. I. Strengthening Chamfer at the Rear Surface of Ceramic Thread Cutters. Russian Engineering Research. 2018. Vol. 38. Iss. 1. pp. 40–43.

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