Journals →  Chernye Metally →  2022 →  #9 →  Back

Rolling and other metal forming processes
ArticleName Kinematics of die filling during upsetting of the head of a steel self-tapping screw
DOI 10.17580/chm.2022.09.03
ArticleAuthor Yu. N. Loginov, S. K. Grekhov

Ural Federal University named after the first President of Russia B. N. Yeltsin, Yekaterinburg, Russia1 ; M. N. Mikheev Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia2:
Yu. N. Loginov, Dr. Eng., Prof., Dept. of Metal Forming1, Leading Researcher2, e-mail:


Ural Federal University named after the first President of Russia B. N. Yeltsin, Yekaterinburg, Russia1 ; NLMK-Metiz, Berezovsky, Russia2:
S. K. Grekhov, Postgraduate Student, Dept. of Metal Forming1, Leading Process Engineer2, e-mail:


The aim of the work is to determine the kinematics of filling the die when upsetting the head of a steel self-tapping screw. It is noted that a significant part of the wire from ferrous metals is used for the manufacture of hardware products in the form of screws. For the analysis of the form change, a self-tapping screw made of 15Gps steel was selected. The process modeling was performed by the finite element method using the DEFORM software package. The distribution of the degree of deformation for the final position of the tool during the formation of the workpiece is presented. The contour of the center of forming and the accumulation of plastic deformations along the upsetting of the workpiece are given. The maximum strain up to a value of 2.70 is localized in the central part of the head with the spread of the zone of increased deformation in the transverse direction. A zone of increased deformations is identified in the area of the free surface and adjacent to it to the contact surface of the lower half-stamp. The distribution of the mean normal stress is shown. The highest values up to +504 MPa are observed in the zone of the free surface, not constrained by the action of the tool. Under real production conditions, the screw head profile was measured and recorded in coordinate form. For comparison, the calculated data obtained in solving the problem are given. Differences at small values of the current axial coordinate indicate a shift in the area of increased metal broadening in the calculated version closer to the upper half-stamp. The localization of tool wear in the real process is fixed. It is noted that the location of this zone corresponds to the position of the region where the highest level of plastic deformation is established by calculations, which corresponds to one of the variants of wear theories.

keywords Steel wire processing, hardware manufacturing, stresses, plastic deformation, finite element method, self-tapping screws

1. Filippov А. А., Pachurin G. V., Kuzmin N. А., Nuzhdina Т. V., Goncharova D. А. Experience in preparing high-quality structure and surface properties of rolled steel for cold heading. Metallovedenie i termicheskaya obrabotka metallov. 2019. No. 8. pp. 58–61.
2. Tzou G.-Y., Chen D.-C., Lin S.-H. Multi-stage forging on torx-pin screw with high torque. MATEC Web of Conferences. 2017. Vol. 119. p. 01048.
3. Ishimov А. S., Baryshnikova А. М., Stolyarov F. А. Investigation of the stress-strain state during hot forging of the VOSSLOH SS35 screw track-spike. Modelirovanie i razvitie protsessov obrabotki metallov davleniem. 2018. No. 26. pp. 25–31.
4. Burkin S. P., Loginov Yu. N. Analysis of the deformation during the heading of the railway spike head. Kuznechno-shtampovochnoe proizvodstvo. 1997. No. 8. pp. 15, 16.
5. Burkin S. P., Loginov Yu. N., Mironov G. V. New technology for production of railway spikes on the rolling-stamping line. Kuznechno-shtampovochnoe proizvodstvo. 1998. No. 8. pp. 32–34.
6. Belan A. K., Nekit V. A., Belan O. A. The simulation of cold volumetric stamping by the method of transverse extrusion. MATEC Web of Conferences. 2018 International Conference on Modern Trends in Manufacturing Technologies and Equipment, ICMTMTE 2018. 2018. No. 224. p. 01105.
7. Hsia S.-Y. Cold forming simulation of tapping screws with hexagon flange head using numerical method. Key Engineering Materials. 2020. Vol. 830. pp. 9–14.
8. Alcázar J., Abate G., Antunez N., Simoncelli A., Sánchez Egea A. J. et al. Reduction of die wear and structural defects of railway screw spike heads estimated by FEM. Metals. 2021. Vol. 11. p. 1834.
9. Galkin V. V., Bratukhin А. V., Gavrilov G. N., Ivanov S. V. On the issue of low resistance of punches when extruding a cross-shaped slot in screws with a countersunk head made of 14Kh17N2 steel. Zagotovitelnye proizvodstva v mashinostroenii. 2017. Vol. 15. No. 11. pp. 497–502.
10. Belan A. K., Nekit V. A., Platov S. I., Ogarkov N. N., Belan O. A. Determination of forces at the transverse extrusion. Journal for Technology of Plasticity. 2017. Vol. 42. Iss. 1. pp. 9–18.
11. Zhelezkov О. S., Galiakhmetov Т. Sh., Steblyanko V. L. Determination of energy-power parameters of the process of stamping heads of bolts with a face hole. Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta imeni G. I. Nosova. 2017. Vol. 15. No. 2. pp. 35–39.
12. Weroński W., Gontarz A., Pater Z. Some aspects of new forming process of screw spike. Key Engineering Materials. 2003. Vol. 233–236. pp. 407–412.
13. Nowotyńska I., Kut S., Osetek M. An impact of assembly interference on stresses in the Die tool system during bolt forging. Archives of Metallurgy and Materials. 2019. Vol. 64. pp. 1471–1478.
14. Kartunov А. D., Belan О. А., Belan А. К. The design of nails-screws and the technology for their production in the conditions of JSC MMK-METIZ. Kuznechno-shtampovochnoe proizvodstvo. Obrabotka metallov davleniem. 2018. No. 1. pp. 20–23.
15. Gontarz A., Pater Z., Weroñski W. Head forging aspects of new forming process of screw spike. Journal of Materials Processing Technology. 2004. Vol. 153. pp. 736–740.
16. Faria G. L. D., Godefroid L. B., Cândido L. C., Silotti T. O. Metallurgical characterization and computational simulation of a screw spike aiming to improve its performance in railways. Engineering Failure Analysis. 2016. Vol. 66. pp. 1–7.
17. TU 1640-015-55798700–2006. Self-tapping screws.
18. GOST 1050–2013. Metal products of non-alloyed structural high-quality and special steels. Intr. 01.01.2015.
19. Frérot L., Anciaux G., Molinari J.-F. Crack nucleation in the adhesive wear of an elastic-plastic half-space. Journal of the Mechanics and Physics of Solids. 2020. Vol. 145. p. 104100.
20. Loginov Yu. N., Shalaeva М. S., Demakov S. L., Illarionov А. G. Specifics of tool wear during mandrel drawing of capillary tubes. Trenie i iznos. 2014. Vol. 35. No. 4. pp. 461–469.

Language of full-text russian
Full content Buy