Siberian Federal University, Krasnoyarsk, Russia:

I. L. Konstantinov, Candidate of Technical Sciences, Associate Professor of Metal Forming Department, e-mail: ilcon@mail.ru
S. B. Sidelnikov, Doctor of Technical Sciences, Professor of Metal Forming Department, e-mail: sbs270359@yandex.ru
P. O. Yuryev, Head of the Laboratory of Low-Carbon Metallurgy and Energy, e-mail: pashka_urew@mail.ru
Yu. V. Baykovskiy, Post-Graduate Student of Metal Forming Department, e-mail: baykovskjy98@gmail.com

The study of the manufacturability of industrial sheets made of aluminum alloy 1580 for the shape-changing operations of sheet stamping by computer modeling in the DEFORM program with subsequent verification by physical experiment was carried out. Drawing and flanging coefficients, at which it is possible to carry out these operations without cracking, have been established. The results of the research will expand the range of applications of this alloy and will make it possible to obtain parts with rigidity elements from it, which will increase the efficiency of their use. Configurations of such parts can be developed by computer modeling, the reliability of the results of which in this work is confirmed by physical experiments. A study of the manufacturability of semi-finished sheet products made of aluminum alloy 1580 for sheet stamping was carried out. Industrial cold-rolled sheets with a thickness of 1 mm were used as the material. To evaluate the technological effectiveness, we chose such shape-changing operations of sheet stamping as drawing without thinning the wall of the “cup” part type and flanging of the blank in the form of a ring. The first stage was a computer simulation of these operations in the software package DEFORM, which allowed to determine the limiting values of drawing (K) and flanging (Co) coefficients, respectively 1.07 and 1.28, at which the values of the Cockroft-Latham criterion on the surface of virtual blanks did not reach a critical value equal to 1. Physical experiments have shown that drawing with a K coefficient greater than 1.07 leads to crack formation in the junction area of the part wall with its bottom. When flanging with a K0 coefficient of more than 1.28, cracks occurred at the edge of the inner bore of the blank. It was also shown by computer simulation and then confirmed by physical experiment that the use of lubricant during drawing extends the deformability range of the alloy for this operation to a value of K = 1.14. The results of the research will allow to expand the range of application of this alloy and make it possible to produce parts with rigidity elements from it, which will increase the efficiency of their use. Configurations of such parts can be developed by computer modeling, the reliability of the results of which in this work is confirmed by physical experiments.

The work was performed by the Laboratory of Low-Carbon Metallurgy and Energy under the state assignment of the FSAEI HE “Siberian Federal University”, a participating organization of the REC “Yenisei Siberia”, as part of the national project “Science and Universities”, project number FSRZ-2021-0010.

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