DOI: https://doi.org/10.20535/2521-1943.2020.88.204641

Application of a Special Profile Deforming Tool for Intensification of the Extrusion Process in Radial Matrixes

Volodymyr Kaliuzhnyi, Olexandr Yarmolenko

Abstract


Calculated analysis of the extraction of axisymmetric hollow products from low carbon steel using a special profile deforming tool were carried out by the Finite Element Method. An elastic-plastic model of the workpiece metal was used. Coulomb friction, hardening, deformation rate and thermal effect during cold forming are considered. A special profile of the tool is a wavy surface, which is formed by the intersection of tori with the same diameter of the section, located with a certain step. Special profile of the Matrix and the clamp provided a decrease in the effect of friction on the drawing force. The special profile punch creates a pulling force behind the wall of the deformed workpiece in the gap between the matrix and the punch due to the filling of cavities with metal on its side-surface. Unloading of the bottom of the workpiece occurs by the amount of pulling force. The smoothing of the protrusions on the inner surface of the deformed workpiece is carried out during the reverse movement of the punch of a special profile and removing the product. The use of a special profile tool has reduced the number of draw transitions for low-carbon steel products by half.  At the same time, it was possible to draw with thinning the wall, which provided a decrease in the wall thickness variations. Possibility of extraction by a punch with a radius of rounding, which is two times less in comparison with the extraction of a traditional tool. This eliminates the additional operation of calibrating products after drawing. For the considered options for drawing with different gaps between the die and the punch, the dependences of the drawing forces, the forces on the clamps and the forces of removing products from the punches are established. The stress-strain state of the workpieces and the temperature of the deformed metal were revealed. Particular attention is paid to axial tensile stresses, which are the main reason for the separation of the bottom of the product. The shape and dimensions of the products after drawing are determined.


Keywords


finite element method; drawing; sheet blank; low carbon steel; special profile tool; drawing force; pressing force; axial stress; strain rate; shape and dimensions of products.

References


Romanovskii, V.P. (1979), Spravochnik po kholodnoi shtampovke [Cold Stamping Handbook], 6 th ed., revised and supplemented, Mashinostroenie, Leningrad, Russia.

Matveeva A.D. (ed.) (1985–1987), Kovka i shtampovka: Spravochnik, Listovaya shtampovka [Forging and stamping: Reference: Sheet stamping], in Semenov E.I. (ed.) and dr., vol. 4, no.4, Mashinostroenie, Moscow, Russia.

Averkiev, Yu.A. and Averkiev, A.Yu. (1989), Kholodnaya shtampovka [Cold stamping], Mashinostroenie, Moscow, Russia.

Popov, E.A., Kovalev, V.G. and Shubin, I.N. (2000), Tekhnologiya i avtomatizatsiya listovoi shtampovki [Technology and automation of sheet stamping], MGTU im. N.E. Baumana, Moscow, Russia.

Krivoshein, V.A. (2014), “Sravnitel'nyi analiz teoreticheskikh i eksperimental'nykh dannykh pri issledovanii protsessa obzhima v matritse s kol'tsevymi kanavkami”, Izvestiya vuzov, Izvestiya vuzov: Mashinostroenie, no. 5, pp. 10–12.

Kalyuzhnyi, A.V. and Kalyuzhnyi, V.L. (2015), Intensifikatsiya formoobrazuyushchikh protsessov kholodnoi listovoi shtampovki [Intensification of forming processes of cold sheet stamping], TOV “Sik Grup Ukraina”, Kiev, Ukraine.

Kalyuzhnyi, V.L. and Red'ka, K.K. (2018), “Vliyanie radiusa zakrugleniya puansona spetsial'nogo profilya na vytyazhku osesimmetrichnykh izdelii s listovoi zagotovki iz nerzhaveyushchei stali”, Vestnik NTU “KhPI”, Seriya: Innovatsionnye tekhnologii i oborudovanie obrabotki materialov v mashinostroenii i metallurgii, Khar'kov, no. 31(1307), pp. 45–50. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41136


GOST Style Citations


  1. Романовский В.П. Справочник по холодной штамповке. – 6-е изд., пераб. и доп. / В.П. Романовский. – Л.: Машиностроение, 1979. – 520 с.
  2. Ковка и штамповка: Справочник: В 4 т.;т. 4. Листовая штамповка / Под ред. А.Д. Матвеева; Ред. совет: Е.И. Семенов (предс.) и др. – М.: Машиностроение, 1985-1987. – 544 с.
  3. Аверкиев Ю.А. Холодная штамповка / Ю. А. Аверкиев., А. Ю. Аверкиев. - М: Машиностроение, 1989. - 304 с
  4. Попов Е.А. Технология и автоматизация листовой штамповки / Е.А. Попов, В.Г. Ковалев, И.Н. Шубин. - М: Изд-во МГТУ им. Н.Э. Баумана, 2000. – 480 с.
  5. Кривошеин В.А. Сравнительный анализ теоретических и экспериментальных данных при исследовании процесса обжима в матрице с кольцевыми канавками / В.А. Кривошеин // Известия вузов: Машиностроение, 2014. - №5. – С. 10-12.
  6. Калюжный А.В. Интенсификация формообразующих процессов холодной листовой штамповки / А.В. Калюжный, В.Л. Калюжный. - К: ТОВ «Сик Груп Украина», 2015. – 292 с.
  7. Калюжный В.Л. Влияние радиуса закругления пуансона специального профиля на вытяжку осесимметричных изделий с листовой заготовки из нержавеющей стали / В.Л. Калюжный, К.К. Редька // Вестник НТУ «ХПИ», Серия: Инновационные технологии и оборудование обработки материалов в машиностроении и металлургии. – Харьков: НТУ «ХПИ», 2018. - №31(1307. – С. 45-50.




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