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

Lisunets N. L., Dr. Eng., Associate Prof., Chair of Metal Forming, e-mail: lisunec@yandex.ru

The paper considers possibilities of improvement of preparation production facilities of the metal working enterprises using section and sheet rolled metal due to application of waste-free shift cutting in stamps and shears. Relevance of this work is stipulated by increase in cost of rolled metal and need of putting into practice the resource-saving technologies. Traditional approaches to development of the new processes based on physical simulation are described and significant time reduction for designing and technological preparation of production in its combination with computer simulation is revealed. The simplest process — cutting of section billet by a flat punch — is researched. The results of simulation of the cutting process for long sections on a crank press and on the computer in a finite-element medium are presented. Mathematical models in the form of regression equations were developed on the basis of the experimental results for determination of geometrical parameters of the process. The stress-strain state during cutting of rolled coiled steel on strip billets using multi-disc shears incorporated in the longitudinal cutting lines is analyzed. On the basis of passive production experiment and processing of its results by statistical methods, mathematical models of geometrical parameters — quality indicators — were developed. The stress-strain state in the process of coiled steel cutting to strip billets was determined. These results made it possible to optimize the process depending on the mechanical properties of rolled products and their thickness, as well as to improve surface quality of cut billets.

1. Solovtsov S. S. Waste-free cutting of rolled metal bars in stamps. Moscow: Mashinostroenie, 1985. p. 176.
2. Rybin Yu. I., Rudskoy A. I., Zolotov А. М. Mathematical modeling and design of technological processes at metal forming. St. Petersburg: Izdatelstvo SPbGPU, 2004. p. 644.
3. Lisunets N. L. Development and study of complex processes for production of pieces in stamps from rolled bars: thesis of inauguration of Dissertation ... of Candidate of Engineering Sciences: 05.03.05. Moscow: Mosstankin, 1990. p. 24.
4. Understandable introduction in actual analysis of data in Statistica system. Moscow: Goryachaya liniya — Telekom, 2016. p. 608.
5. http://www.qform3d.com/
6. http://www.deform3d.com/
7. Humel P., Strandell Р. Werzeung und Spanzeung heim Hochgeschwindigkeitstrennen von Rundprofilstangen. Maschinenmerkt. 1977. No. 73. pp. 1357–1359.
8. Telegin I. V., Volodin I. М. Analysis of metal consumption in processes of cutting and heating of round bars. Fundamentalnye issledovaniya. 2015. No. 7-4. pp. 722–726.
9. Lisunets N. L., Radyuk A. G., Fedotov E. S., Kolobov A. V., Vinogradov A. I. Simulation of slitting of coiled steel at multi-disk shears of coil slitting lines. CIS Iron and steel Review. 2012. No. 1. pp. 21–23.
10. Radyuk А. G., Lisunets N. L., Fedotov E. S. Multidisc shears of a steel coil slitting line. Development of a generalized technological model. Saarbrücken, Germany: Palmarium Academic Publishing, 2013. p. 69.
11. Quazi T. Z., Shaikh R. S. An Overview of Clearance Optimization in Sheet Metal Blanking Process. International Journal of Modern Engineering Research (IJMER). 2012. No. 2. pp. 4547–4558.
12. Petrov P. А. Shearing operation in rolling production and evaluation of their efficiency. Modern metallurgy of the new century: collection of scientific reports of International scientific and practical conference. 23–25 November 2016. Lipetsk: Izdatelstvo Lipetskogo gosudarstvennogo tekhnicheskogo universiteta, 2016. pp. 226–230.
13. Petrov P. A., Strichenko S. М., Boyko I. I., Sytnik А. А. Mathematical modeling of energy-power parameters of the cutting-to-length process for round bars. Metal forming processes: collection of scientific reports. Kramatorsk: DGMA, 2012. No. 1. pp. 227–232.
14. Borovik P. V. Analysis of using plasticity model influence on results of shear cutting simulation. Visnik NTU Ukraini KPI. 2012. No. 64. pp. 190–195.