Experimental Study of Upsetting and Die Forging with Controlled Impact

The results from experimental research of deformation
by upsetting and die forging of lead specimens wit controlled impact
are presented. Laboratory setup for conducting the investigations,
which uses cold rocket engine operated with compressed air, is
described. The results show that when using controlled impact is
achieving greater plastic deformation and consumes less impact
energy than at ordinary impact deformation process.

• T. Penchev
• D. Karastoyanov

• Rocket Engine
• Forging Hammer
• Sticking Impact
• Plastic Deformation.

[1] Degarmo E. P., Black J. T., Kohser R. A. (2003), Materials and
Processes in Manufacturing (9th ed.), Wiley.
[2] Altan T., G.Ngale, G.Shen, Cold and Hot Forging: Fundamentals and
Applications, 2005, ASM International.
[3] Bodurov P., Penchev T., Industrial Rocket Engine and its Application
for Proppeling of Forging Hammers, Journaj of Materials Processing
Technology, v.161, 3, 2005, 504-508.
[4]
. Penchev, P.Bodurov, D.Karastojanov, New Industrial Engine –
Priority and Field of Application, Proceedings of Manufacturing
Systems, Bucharest, 2012, v.7 (4), 241-244.
[5] T.Penchev, I.Altaparmakov, D.Karastojanov, Experimental study on the
possibilities to decrease the coefficient of restitution after impact,
International Journal "Applied Mechanics and Materials”, v.219, 2012,
1659-1662.
[6] T. Penchev, D.Karastojanov, I.Altaparmakov, Experimental Study on
"Controlled Impact” Effect in Plastic Deformation Processes,
"Advanced Materials Research”, v.772, 2013, pp 3-8
[7] P. Genova, K. Kostadinov, V. Kotev., Kinematic invariants with
infinitesimally close positions of mechanisms with two degrees of
freedom., Theoretical and Applied mechanics, 2-5 Sept. 2009, Borovets,
Bulgaria, 2009.
[8] P. Genova, K. Kostadinov, V. Kotev, M. Mihailova., Application of
methods of kinematic geometry in the synthesis of manipulating
systems., Mechanics of machines, vol. 91, pp: 79-82, 2010.