Ural Federal University, Ekaterinburg, Russia:

D. L. Schwarts, Dr. Eng., Associate Prof., Head of the Dept. of Metal Forming
A. M. Mikhailenko, Cand. Eng., Associate Prof.
E. I. Salikhyanova, Assistant, Postgraduate student, e-mail: ustinova1694@gmail.com

Optimization of roll grooving for channel rolling is carried out on the basis of the developed “Two-stage optimization concept”, according to which optimization takes place in two stages: the search for the optimal passes scheme and the search for the optimal reduction mode. Previously, the creation of the "Space of channel pass schemes" was considered. The next step in the search for the optimal pass scheme is the formation and structuring of the "Space of channel passes schemes", which is the space of the first optimization. It includes all channel grooves intended for production of a channel of a certain number and type. Filling the space is carried out with the help of the “channel passes scheme generator”, which enables to create all options for channel grooves, without losing any of the possible options. Four main types of channel passes schemes are distinguished: straight-flange, flared flange, by method of bending and combined one. Each type of passes schemes has its own subtypes. A universal block structure of channel grooves has been developed, according to which any groove, regardless of the type of the scheme, is divided into ordered blocks of grooves. In order to establish the possibility of a strip transition from one channel groove to another one, within the block and during the transition from the grooves of one block to the grooves of another one, three main groove graphs and five auxiliary graphs have been created.

The reported study was funded by RFBR, project No. 20-38-90246.

1. Shvarts D. L., Mikhailenko А. М., Ustinova Е. I. Optimization of roll calibrations for beam channel rolling. Part 1. General regulations. Chernye Metally. 2019. No. 9. pp. 4–8.
2. Shvarts D. L., Mikhailenko А. М., Salikhyanova Е. I. Optimization of roll calibrations for beam channel rolling. Part 2. Space of channel gauges. Chernye Metally. 2022. No. 4. pp. 27–33.
3. Mikhailenko А. М., Shvarts D. L. The concept of optimal grooving of section rolls. Message 3. The space of pass schemes. Izvestiya vysshikh uchebnykh zavedeniy. Chernaya metallurgiya. 2019. No. 1. pp. 15–24.
4. Ilyukovich B. М., Nekhaev N. Е., Merkuryev S. Е. Rolling and grooving. Vol. V. Dnepropetrovsk: Dnepro-VAL, 2002. 481 p.
5. Smirnov V. К., Shilov V. А., Inatovich Yu. V. Grooving of rolling rolls: textbook for universities - 2^nd edition, revised. and enlarged. Moscow: Teplotekhnik, 2010. 490 p.
6. Rudskoy А. I., Lunev V. А. Theory and technology of rolling production: textbook for universities. Izdatelstvo «Lan». 2020. 528 p.
7. GOST 8240–97. Hot-rolled steel channels. Assortment. Moscow: Standartinform, 2001. 10 p. Introduced: 01.01.2002.
8. Li S., Zhang L., Zhao J. Testing, modelling and design of hot-rolled stainless steel channel sections under combined compression and minor-axis bending moment. Thin-Walled Structures. 2022. Vol. 172. No. 108836.
9. Qadir S. J., Nguyen V. B., Hajirasouliha I. et al. Optimal design of cold roll formed steel channel sections under bending considering both geometry and cold work effects. Thin-Walled Structures. 2020. Vol. 157. No. 107020.
10. Raknes C. A., Ma J., Welo T., Paulsen F. A new mechanical calibration strategy for U-channel extrusions. International Journal of Advanced Manufacturing Technology. 2020. Vol. 110, Iss. 1–2. pp. 241–253.
11. Jin X., Xu D., Wang H. A method of channel calibration using periodic monitoring for phased array radar based on FPGA. IET Conference Publications. 2020. Vol. 779. pp. 144–149.
12. Wang F., Zhao O., Young B. Flexural behaviour and strengths of press-braked S960 ultra-high strength steel channel section beams. Engineering Structures. 2019. Vol. 200. 12 p.
13. Bergeman G. V. Mastering the production of a large-sized section of channel No. 30P in the conditions of a medium-section mill "550". Metally i lityo Ukrainy. 2016. No. 2. pp. 36–41.
14. Omelchenko А. V. Graph theory. Moscow: MTsNMO, 2018. 416 p.