Hot stamping of steel hollow forgings with intensive plastic deformation walls and bottom

Authors

  • V. L. Kaliuzhniy National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" (NTUU "I. Sikorsky KPI"), Kyiv https://orcid.org/0000-0002-4904-8879
  • O. S. Yarmolenko National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" (NTUU "I. Sikorsky KPI"), Kyiv
  • K. V. Malii Donbass State Engineering Academy (DSEA), Kramatorsk https://orcid.org/0000-0002-9046-4268

DOI:

https://doi.org/10.37142/2076-2151/2020-1(50)98

Keywords:

hot stamping, hollow forging, reverse extrusion, drawing with thinning, finite element method, deformation intensity.

Abstract

Kaliuzhniy V. L., Yarmolenko O. S., Malii K. V. Hot stamping of steel hollow forgings with intensive plastic deformation walls and bottom. Material working by pressure. 2020. № 1 (50). С. 98-103.

The simulation results of the finite elements method of the process of hot stamping of hollow forgings made of low-carbon steel with intense processing steel plastic deformation of the wall and the bottom part to obtain the necessary mechanical properties are given. Stamping consists of two transitions that are implemented on one press. In the first transition, a hollow semi-finished product with protrusions on the bottom side of the cavity and the lower end of this part are obtained reverse extrusion. In the second transition of the drawing with thinning through two successively arranged matrices and the additional stamping of the bottom part, the final shape and the size of the product with the flange are obtained. The rate of deformation and heating of the deforming tool, which provided the temperature range of hot stamping throughout the execution of two transitions was determined. At each transition, was found the deformation force, the distribution of specific forces on the deforming tool for the selection of equipment and the design of stamping equipment. The study of the structure of the metal with plastic deformation is estimated by the magnitude of the intensity of deformations. The degrees of deformation are established to carry out the drawing with thinning without destruction in successively arranged matrices. The temperature distributions of the selected metal after extrusion, drawing in the first and second matrices are shown. The distribution of deformity intensity in a semi-finished product after extrusion, after performing the drawing in the first and second matrices, as well as in the product after the additional stamping of the bottom part. A more uniform distribution of the intensity of deformations in the width of the wall as a result of an exhaust with refinement is noted. The final form and dimensions of the product are found.

Author Biographies

V. L. Kaliuzhniy, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" (NTUU "I. Sikorsky KPI"), Kyiv

Doctor of Technical Sciences, Full Professor

O. S. Yarmolenko, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" (NTUU "I. Sikorsky KPI"), Kyiv

Graduate student

K. V. Malii, Donbass State Engineering Academy (DSEA), Kramatorsk

Сandidate of Тechnical Science, Senior Lecturer

Published

2020-03-31

How to Cite

Kaliuzhniy, V. L., Yarmolenko, O. S., & Malii, K. V. (2020). Hot stamping of steel hollow forgings with intensive plastic deformation walls and bottom. Materials Working by Pressure, (1(50), 98–103. https://doi.org/10.37142/2076-2151/2020-1(50)98

Issue

Section

SECTION II PRESSURE TREATMENT PROCESSES IN MECHANICAL ENGINEERING