National University of Science and Technology “MISiS” (Moscow, Russia):

S. V. Samusev, Dr. Eng., Prof., Metal Forming Dept.
V. A. Fadeev, Post-graduate, Metal Forming Dept., e-mail: fdv-viktor@mail.ru

Experimental data for the process of continuous forming tube skelps (TS) have been presented. A physical experiment was carried out to determine the TS contact prints with a roll tool for the 50 mm diameter pipe with the 1.5 mm thick wall at the 30–50 electric pipe-welding unit (TESA). The 09G2S steel sheet blank was used as an experimental sample. TS was formed in the section of open stands (OS) with a rectilinear lower generating trajectory. A review of the method to determine the contact interaction showed that the boundaries of the contact of upper and lower rolls with the TS have a straightforward character. A schematic diagram of the experiment to determine the TS contact areas with the TESA forming rolls is presented. According to experimental data, the parameters of contact prints in the stands of the forming section were determined. It was established that the boundaries of contact prints are curved. The areas of backward and forward slips of the contact prints that affect the kinematic and energy parameters were determined. By areas, the ratios of pulling forces were determined. Comparison of the results of energy-power parameters obtained by calculation and experimental methods showed that the pulling force indices determined experimentally are by 10–15 % lower than the calculated ones.

1. Rymov V. А., Polukhin P. I., Potapov I. N. Improvement of welded tube production. Moscow: Metallurgiya, 1983. 286 p.
2. Matveev Yu. М., Vatkin Ya. L. Grooving tool of tube mills. 2^nd edition. Moscow: Metallurgiya, 1970. 480 p.
3. Zhukovsky B. D., Zilbershteyn L. I., Furmanov V. B. Tube production. Moscow: Metallurgiya, 1970. 106 p.
4. Samusev S. V., Aleshchenko А. S., Fadeev V. А. Modeling of the process for continuous forming of longitudinal welded tubes at the TESA 10-50 simulator basis. Izvestiya vysshikh uchebnykh zavedeny. Chernaya metallurgiya. 2018. Vol. 61. No. 5. pp. 378–384.
5. Samusev S. V., Zakharov D. V., Marshalkin Е. L., Borisevich V. G. Improvement of the technology for production of light-wall tubes and small-diameter shells. Izvestiya vysshikh uchebnykh zavedeny. Chernaya metallurgiya. 2007. No. 7. pp. 36–38.
6. Danchenko V. N., Kolikov А. P., Romantsev B. А. et. al. Tube production technologies. Moscow: Intermet inzhiniring, 2002. 638 p.
7. Samusev S. V., Zhigulev G. P., Skripalenko М. М., Fadeev V. А. Research of technological parameters of billet stepwise forming in production of large diameter tubes at tube electric pipe welded line TESA 1420. Chernye Metally. 2017. No. 9. pp. 73–77.
8. Yusupov V. S., Kolobov А. V., Akopyan К. E., Seleznev М. S., Sominin М. А. Improvement of the technology for production of longitudinally welded pipes. Report 1. Stal. 2015. No. 8. pp. 44–50.
9. Kolikov A. P., Taupek I. M. Simulation of Continuous Roll Forming Process for Producing Welded Pipes of Small and Medium Diameters. Metallurgist. 2018. Vol. 61. No 9–10. pp. 839–843.
10. Kasaei M. M., Naeini H. M., Tafti R. A., Tehrani M. S. Prediction of maximum initial strip width in the cage roll forming process of ERW pipes using edge buckling criterion. Journal of Materials Processing Technology. 2014. Vol. 214, Iss. 2. pp. 190–199.
11. Shinkin V. N. Calculation Of technological parameters of o-forming press for manufacture of large-diameter steel pipes. CIS Iron and Steel Review. 2017. Vol. 13. pp. 33–37.
12. Park Y., Lee C., Kim J., Kim D., Ahn H. et al. Parametric analysis for minimizing the edge waves in the roll forming. International Journal of Automotive and Mechanical Engineering. 2018. Vol. 15, Iss. 3. pp. 5480–5499.
13. Barabantsev G. Е., Tyulyapin А. N., Kolobov А. V., Yusupov V. S. Improvment of the technology for production of longitudinally welded pipes. Proizvodstvo prokata. 2005. No. 12. pp. 21–23.
14. Li Z. K. The detailed forming behavior of ERW tube- and pipemaking process. Iron and Steel Technology. 2018. Vol. 15, Iss. 8. pp. 150–159.
15. Lee J., Kim D., Quagliato L., Kang S., Kim N. Change of the yield stress in roll formed ERW pipes considering the Bauschinger effect. Journal of Materials Processing Technology. 2017. Vol. 244. pp. 304–313.
16. Alyushin Yu. А., Samusev S. V., Zhigulev G. P. Bending of sheet billets for longitudinal-welded tubes. Chernye Metally. 2016. No. 5. pp. 40–46.
17. Abeyrathna B., Rolfe B., Weiss M. The effect of process and geometric parameters on longitudinal edge strain and product defects in cold roll forming. International Journal of Advanced Manufacturing Technology. 2017. No. 92. pp. 743–754.
18. Abeyrathna B., Rolfe B., Hodgson P., Weiss M. Local deformation in roll forming. International Journal of Advanced Manufacturing Technology. 2017. Vol. 88, Iss. 9–12. pp. 2405–2415.
19. Qiu L., Zhang S., Wang Z., Hu X., Liu X. A robust optimization design method for sheet metal roll forming and its application in roll forming circular cross-section pipe. International Journal of Advanced Manufacturing Technology. 2019. Vol. 103. No. 5–8. pp. 2903–2916.
20. Paralikas J., Salonitis K., Chryssolouris G. Energy efficiency of cold roll forming process. International Journal of Advanced Manufacturing Technology. 2013. Vol. 66, Iss. 9–12. pp. 1271–1284.
21. Safdarian R., Moslemi Naeini H. The effects of forming parameters on the cold roll forming of channel section. Thin-Walled Structures. 2015. Vol. 92. pp. 130–136.