MATHEMATICAL MODELING OF DIRECT EXTRUSION POWER PARAMETERS OF LOW-MELTING MATERIALS
DOI:
https://doi.org/10.14529/met200207Keywords:
wire extrussion, mathematical modeling, pressing force, solder, fluid-actuated pressAbstract
It is extremely important to determine the technological parameters of the process when extrusion low-melting materials. We developed a mathematical model of wire and rods direct extrusion from low-melting materials, which allows us to determine the energy-power process parameters. The mathematical model adequacy was checked during a laboratory experiment on a hydraulic press. The force and speed of extrusion were measured and recorded in laboratory conditions using the data collection system installed on press. The adequacy check was carried out by extrusion 8.00 and 15 mm rods and 2.00 mm wire. Result showed a high precision of calculations with experimental measurements. The error did not exceed 10 %. The obtained mathematical model was used for analytical studies of rods and wire direct extrusion technological modes of from POIn-521 alloy. Calculations showed that a decrease in the diameter of the finished bar (wire) from 16.00 to 2.00 mm while keeping a workpiece size of 30.00 mm leads to an increase in the extrusion force from 86 kN to 131 kN at the initial moment of extrusion, since it is significant from 4 up to 256 increases the drawing ratio. The force when extrusion a bar of 8.00 mm with an increase in the diameter of the workpiece from 12.0 to 40.0 mm increases from 25 to 171 kN. Conducting analytical studies on the model showed that it is possible not only to study the extrusion process in order to understand the mechanisms of formation of the mechanical and operational properties of the finished rod (wire), but also to design resource-saving extrusion modes for different final products, make an reasoned choice of the required equipment and tools.References
Medvedev A.M. [Lead-free mounting brazing technology. What awaits us?] Electronic components, 2004, no. 11.
Medvedev A.M. [Electronic components and installation sites]. Components and Technologies, 2006, no. 12.
Grigoriev V. [Lead-free technologies - the demand of the times or the whim of lawmakers from the environment?] Electronic components, 2001, no. 6.
Zenin V.V., Belyaev V.N., Segal Yu.E., Kolbenkov A.A. [Lead-free solders in the technology of production of microelectronics products] Microelectronics, 2003, vol. 32, no. 4.
Bleifreiloten: Silber und Kupfer statt Blei. Krempelsauer. Elektor (BRD), 2000, no. 5.
Shapiro L. [The use of lead-free technologies cannot be avoided] Bulletin of Electronics, 2007, no. 2.
Shapiro L. [Implementation of the European directive RoHS] Electronic components, 2006, no. 1.
Glebov LA, Radionova LV, Faizov S.S. [POIN-52 Solder: process research and development of small-scale wire production technology] Magnitogorsk Rolling Practice 2019: materials of the IV youth scientific-practical conference. A.G. Korchunov (Ed.). Magnitogorsk: Nosov Magnitogorsk State Technical University Publ., 2019. p. 54–56.
Radionova L.V. [Development of a methodology for designing wire production technologies] Proceedings of the XII Congress of distributors (Volume I). Collection of articles Spirin S.A., Dumcheva T.N. (Ed.), Moscow: Green Print, 2019. p. 76–79.
Kargin V.R. [Theory and technology of extrusion of aluminum alloys: textbook. Allowance] / V.R. Kargin, A.F. Grechnikova, Y.A. Erisov, Yu.S. Starostin. - Samara: Publishing House of SSAU, 2015. 80 p.
Loginov Y. N. [Pressing as a method of intense deformation of metals and alloys: a training manual], Yekaterinburg: UrFU, 2016, 156 p. – https://e.lanbook.com/book/99055.
Backofen W. Deformation processes. Moskow: Metallurgy Publ., 1977. 288 p.
Tselikov, A.I. [Rolling theory]. / A.I. Tselikov, A.D. Tomlenov, V.I. Zyuzin et al. – Moskow, Metallurgy Publ., 1982. 335 p.
Y.D. Zheleznov, Polukhin P.I. [Sheet rolling and roll service], Moskow, Metallurgy Publ., 1967. 388 p.
