Stamping a medium – sized cartridge blank from low – carbon steel
Keywords:cartridge blank; finite element method; semi-finished product; reverse extrusion; thinning drawing; crimping, force; normal stresses; deformation intensity.
The work is devoted to obtaining a medium – sized cartridge blank from low-carbon steel. The sequence of punching transitions includes a hot back- extrusion operation, two cold draw – thinning operations, and a cold crimp operation. Modeling using the finite element method established: efforts and specific forces during operations, thermal effect during shaping, shape and size of semi – finished products with distributions of strain intensity. An elastoplastic metal model was used, which made it possible to reveal the forces of extracting the tool from deformed semifinished products and the forces of removing semifinished products from the matrix. A hollow semifinished product with the required dimensions of a protrusion on the bottom part from the side of the cavity and a protrusion on the end for forming a flange is obtained by reverse extrusion. The possibility of carrying out the first drawing operation with thinning through three sequentially located matrixes is shown. After this operation, annealing of the semi-finished product is required to restore plasticity. In the second operation of drawing with thinning and additional stamping of the bottom part, the final dimensions of this part from the side of the cavity and the shaping of the flange on the lateral surface of the semi-finished product are provided with the creation of a macrostructure to ensure the required operational properties. The shape and dimensions of the wall of the semi-finished product after the second drawing, the distribution of the intensity of deformations in it are determined from the condition of reaching the final dimensions and mechanical properties of the cartridge blank at the last crimping operation. For this, the deformations obtained as a result of the second drawing are taken into account when modeling the crimp. The proposed technology for stamping a blank of a sleeve can be implemented on a universal press – forging equipment, has a high productivity and minimizes mechanical processing.
“Goryachaya ob'emnaya shtampovka”, in Kovka i shtampovka, Spravochnik, E.I. Semenov, Moscow, Russia: Mashino-stroenie, Vol. 4, T.2., 1986.
O.V Kalyuzhniy, V.L. Kalyuzhniy, Intensifikatsiya formoutvoryuyuchih protsesiv holodnogo listovogo shtampuvann-ya. Kyiv, Ukraine: TOV “Sik Grup Ukrayina”, 2015.
O.V. Kalyuzhniy, S.S. Sokolovska, “Viznachennya parametriv vityaguvannya z potonshennyam zprofilovanim pu-ansonom porozhnistih zagotovok pIslya vidavlyuvannya”, Seriya “Innovatsiyni tehnologiyi ta obladnannya obrobki materialiv u mashinobuduvanni ta metalurgiyi”, visnik NTU “HPI”, Harkiv: NTU “HPI”, No. 36 (1257), pp. 21–28, 2017.
V.L. Kalyuzhniy, O.S. Yarmolenko, “Intensifikatsiya protsesu holodnogo obtisku porozhnistih napIvfabrikativ dlya otrimannya virobiv zi zminnoyu tovschinoyu stinki”, Mechanics and Advanced Technologies, No. 1 (85), pp. 111–117, 2019. https://doi.org/10.20535/2521-1943.2019.85.164271
V.N. Danchenko, A.A. Milenin and V.I. Kuzmenko, Kompyuternoe modelirovanie protsessov obrabotki metallov davleniem. Chislennyie metodyi, Dnepropetrovsk, Ukraine: Sistemnyie tehnologii, 2008.
I.S. Aliev, O.E Markov and Ya.G. Zhbankov, Vliyanie operatsii vyivorota pokovki konicheskimi plitami na raspre-delenie deformatsiy. Obrabotka materialov davleniem, Kramatorsk: DGMA, No. 3(24), pp. 64–69, 2010.
S.A. Snitko, V.L. Kalyuzhnyiy, “Konechno-elementnoe modelirovanie mnogoperehodnogo formoizmeneniya pri pro-izvodstve zheleznodorozhnyih koles”, Vestnik NTUU “KPI”. Mashinostroenie. Kiev: NTUU “KPI”. No. 11, pp. 106–112, 2011.
I.S. Aliev, Ya.G Zhbankov and L.V Tagan, “Upravlenie napryazhenno-deformirovannyim sostoyaniem zagotovki v protsessah kovki krupnyih pokovok. Obrabotka materialov davleniem”. Kramatorsk: DGMA, No. 1 (34), pp. 50–59, 2013.
V. Kaliuzhnyi et al, “Simulation of Cold Extrusion of Hollow Parts”, Metallurgist, Vol. 61, No. 5–6, September, 2017, (Russian Original No. 5–6, May–June, 2017), pp. 359–365. https://doi.org/10.1007/s11015-017-0501-1
V.L. Kalyuzhnyiy et al., “Goryachaya ob'emnaya shtampovka polyih izdeliy iz vyisokoprochnogo alyuminievogo splava s zadannyimi mehanicheskimi svoystvami”, Zagotovitelnoe proizvodstvo, No. 12, pp. 18–25, 2018.
V.L. Kalyuzhniy, O.V. Kalyuzhniy and K.L. Marchuk, “Rozrahunok rozmiriv vihidnoyi porozhnistoyi zagotovki iz tonkoyu stinkoyu zminnoyi tovschini ta obtisk yiyi v matritsy z konusno-tsilindrichnoyu deformuyuchoyu pover-hneyu”, Mechanics and Advanced Technologies, No. 3 (90), pp. 106–112, 2020.
A.V Tretyakov, V.I Zyuzin, Mehanicheskie svoystva metallov i splavov pri obrabotke davleniem. Spravochnik. Izd. 2-e, pererab. i dop. M: Metallurgiya, 1973.
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