Engineering, Energy, Transport AIC

Sergii Karnaukh – Ph.D., Associate Professor of the Department "Fundamentals of Machine Design"  of the Donbass State Engineering Academy (st. Akademicheskaya, 72, Kramatorsk, 84313, Ukraine, email: k_sergii@i.ua,  https://orcid.org/0000-0003-2878-4065).

The purpose of this work is to study the known method of division of pipes by introducing a figure knife and the development of promising designs of equipment for division of pipes into measured workpieces. Based on the analysis of the actuating crank-slider mechanisms used in the equipment for division of pipes into measured workpieces, promising schemes of short-connecting rod mechanisms have been discovered that provide a local pipe section along the perimeter. The developed design of the device for dividing pipes into dimensional workpieces by the eccentric twisting method, which contains a wedge-joint mechanism in combination with a compact circular actuator, also allows to reduce energy and power costs for separation, reduce the consequences of instantaneous unloading of equipment and ensure high quality workpieces. A mathematical model of the proposed equipment was developed and the modeling of the cutting process was carried out using the DEFORM-3D software package.
The analysis of the results obtained showed that in the extreme positions of the knives, jamming of the knives is possible. To eliminate jamming, it is necessary that the knives do not reach the extreme position. The adequacy of the mathematical model is confirmed by experimental studies. The error of the calculated and measured values of the torque on the cutting knife does not exceed 10%. This is due to the need for a more correct accounting of friction on the contact surfaces of the equipment. Cut tubular blanks have high geometric accuracy and high quality of the cut surface.

[1]    Song, JL., Li, YT., Liu, ZQ., Fu, JH., Ting, KL. (2009). Numerical simulation and experiments of precision bar cutting based on high speed and restrained state. Mater. Sci. Eng. A. 499 (1-2): 225–229. https://doi.org/10.1016/j.msea.2007.09.098. [in English].
[2]    Krinninger, M., Steinlehner, F., Opritescu, D., Golle, R., Volk, W. (2017). On the influence of different parameters on the characteristic cutting surface when shear cutting aluminum. Procedia CIRP 63: 230–235. https://doi.org/10.1016/j.procir.2017.03.156. [in English].
[3]    Gutknecht, F., Steinbach, F., Hammer, T., Clausmeyer, T., Volk, W., Tekkaya, AE. (2016). Analysis of shear cutting of dual phase steel by application of an advanced damage model. Procedia Struct. Integr. 2: 1700–1707. https://doi.org/10.1016/j.prostr.2016.06.215. [in English].
[4]    Solovczov, S. S. (1985). Bezotkhodnaya razrezka sortovogo prokata v shtampakh. M.: Mashinostroenie. [in Russian].
[5]    Polukhin, P.I., Gorelik, S.S., Voronczov, V.K. (1982). Fizicheskie osnovy` plasticheskoj deformaczii. M.: Metallurgiya. [in Russian].
[6]    Karnaukh, S. G. (2010). Sovershenstvovanie bezotkhodny`kh sposobov razdeleniya sortovogo prokata i oborudovaniya dlya polucheniya zagotovok vy`sokogo kachestva : monografiya. Donbasckaya gosudarstvennaya mashinostroitel`naya akademiya. Kramatorsk. [in Russian].
[7]    Karnaukh, S., Markov, O., Aliieva, L., Kukhar, V. (2020). Designing and researching of the equipment for cutting by breaking of rolled stock. The International Journal of Advanced Manufacturing Technology. т. 109.  Issue 9-12. 2457-2464. https://doi.org/10.1007/s00170-020-05824-7. [in English].
[8]    Karnaukh S.G., Karnaukh D.S. (2011). Research of the influence of deformation speed on energy and power adjectives of the process of three-point cold bend breaking and on alignment integrity of raw parts. Metallurgical and Mining Industry. Dnepropetrovsk. №3. Vol.3. P. 107–114. [in English].
[9]    Roganov, L.L., Karnaukh, S.G., Karnaukh, D.S. (2012). Modelling of process of reception of measured cut-to-length sections from rolled section steel of circular section according to the scheme of incompletely closed parting cut. 12th International conference «Research and development in mechanical industry». RaDMI. Vol. 2.  787–790. [in English].
[10]    Karnaukh, S.G. (2016). Development of the choice procedure for separation method of section iron complex criteria of materials destruction. Mechanics and Advanced Technologies. 2(80). 31–38. [in English].
[11]    Pristrij dlya podilu sortovogo prokatu na mirni zagotovki cposobom eksczentrichnogo zakruchuvannya: pat. 51501 Ukrayina, zayavl. 13.11.2009; opubl. 26.07.2010, Byul. №14 (kn.1). 120 s. [in Ukrainian].