Productivity increasing and metal costs decreasing at stamping process of large lengths brass shell cases

Authors
DOI:
https://doi.org/10.34169/2414-0651.2021.2(30).85-95
Keywords:
Array, Array, Array, Array, Array, Array, Array, Array, Array
Abstract

The results of modeling the operations of stamping a long brass shell case by the finite element method are shown. The sequence of punching operations consists of hot upsetting of a cylindrical billet, hot reverse extrusion of a hollow semi-finished product with a protrusion at the end of the bottom part, three transitions of cold drawing with thinning of semi-finished products, hot upsetting of a protrusion with the formation of a flange at the end of a semi-finished product and cold crimping of a semi-finished product to obtain the required final dimensions of the shell case. This sequence increases productivity and saves metal in the manufacture of the shell case. At each transition of stamping, the following were identified: the final shape and dimensions of semi-finished products, the deformation forces, the distribution of specific forces on the deforming tool for the selection of equipment and the design of stamping equipment. The processing of the metal structure by plastic deformation is estimated by the final value of the deformation intensity. The possibility of using a drawing with thinning in three transitions instead of rotary extrusion is shown. In this case, two transitions are performed by a punch of a special profile. At the third transition of the drawing, the shape and imensions of the semi-finished product were obtained, which at the last crimping operation ensure the required final dimensions of the shell case and the processing of the metal structure by plastic deformation to achieve the appropriate mechanical properties.

Author Biographies
  1. Vladymyr Kaliuzhnyi, National Technical University of Ukraine «Kyiv Polytechnic Institute named Igor Sikorsky»

    Doctor of Technical Sciences,
    Professor
    National Technical University of Ukraine «Kyiv Polytechnic
    Institute named Igor Sikorsky»,
    Kyiv, Ukraine

  2. Serhii Bisyk, Central Scientific Research Institute of Armament and Military Equipment of the Armed Forces of Ukraine

    Candidate of Technical Sciences,
    Senior Research Associate, doctoral student of the scientific and organizational department of Central  Scientifi c Research Institute of Armament and Military Equipment of the Armed Forces of Ukraine,
    Kyiv, Ukraine

  3. Alexander Kaliuzhnyi, IT Education academy

    Candidate of Technical Sciences,
    associate professor,
    Director IT Education academy,
    Kyiv, Ukraine

  4. Vadim Gornostay, «Kyiv Polytechnic Institute named Igor Sikorsky»

    Candidate of Technical Sciences,
    associate professor, «Kyiv Polytechnic Institute named Igor Sikorsky»,
    Kyiv, Ukraine

References

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Published
2022-02-08
Issue
Vol. 30 No. 2 (2021): Weapons and military equipment
Section
PRODUCTION, MODERNIZATION, MAINTENANCE
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How to Cite

Productivity increasing and metal costs decreasing at stamping process of large lengths brass shell cases. (2022). Weapons and Military Equipment, 30(2), 85-95. https://doi.org/10.34169/2414-0651.2021.2(30).85-95

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