The Influence of Extrusion Ratio on Contact Stresses and Die Elastic Deformations in the Case of Cold Backward Extrusion

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PEPELNJAK, Tomaž ;MILUTINOVIĆ, Mladomir ;PLANČAK, Miroslav ;VILOTIĆ, Dragiša ;RANDJELOVIĆ, Saša ;MOVRIN, Dejan .
The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 62, n.1, p. 41-50, june 2018. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/the-influence-of-extrusion-ratio-on-contact-stresses-and-die-elastic-deformations-in-the-case-of-cold-backward-extrusion/>. Date accessed: 22 sep. 2021. 
doi:http://dx.doi.org/10.5545/sv-jme.2015.3051.
Pepelnjak, T., Milutinović, M., Plančak, M., Vilotić, D., Randjelović, S., & Movrin, D.
(2016).
The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion.
Strojniški vestnik - Journal of Mechanical Engineering, 62(1), 41-50.
doi:http://dx.doi.org/10.5545/sv-jme.2015.3051
@article{sv-jmesv-jme.2015.3051,
	author = {Tomaž  Pepelnjak and Mladomir  Milutinović and Miroslav  Plančak and Dragiša  Vilotić and Saša  Randjelović and Dejan  Movrin},
	title = {The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {62},
	number = {1},
	year = {2016},
	keywords = {backward extrusion; contact stresses; die elastic deformation; pin load cell; finite element method},
	abstract = {In this paper, the distribution of contact stresses along the die-workpiece interface as well as elastic deformation behavior of the die in the cold backward extrusion of steel billets have been investigated both experimentally and numerically. For the experiments, a special tooling set including a pin load cell measuring device was designed and made. Contact stresses were recorded at various points in time and at various locations during the extrusion process, i.e. for different punch strokes (part’s bottom thickness). The research focus was on determining the extrusion ratio’s influence on the distribution of the contact stresses and therefore the experiments were performed using five punches of different head diameters. In the next step, based on the measured contact stresses, radial displacements of the inner die wall were calculated by applying Lame’s equation. Furthermore, an extended finite element analysis of the investigated extrusion process was carried out using Simufact.forming software. The results of numerical simulations for the contact stresses were compared with experiments. The benefits and weaknesses of the pin load cell measuring technique and Lame’s formula when it is employed for determination of the die elastic deformation were also examined, as well as were the contribution of the die elastic deformation to dimensional errors of the extruded parts.},
	issn = {0039-2480},	pages = {41-50},	doi = {10.5545/sv-jme.2015.3051},
	url = {https://www.sv-jme.eu/article/the-influence-of-extrusion-ratio-on-contact-stresses-and-die-elastic-deformations-in-the-case-of-cold-backward-extrusion/}
}
Pepelnjak, T.,Milutinović, M.,Plančak, M.,Vilotić, D.,Randjelović, S.,Movrin, D.
2016 June 62. The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 62:1
%A Pepelnjak, Tomaž 
%A Milutinović, Mladomir 
%A Plančak, Miroslav 
%A Vilotić, Dragiša 
%A Randjelović, Saša 
%A Movrin, Dejan 
%D 2016
%T The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion
%B 2016
%9 backward extrusion; contact stresses; die elastic deformation; pin load cell; finite element method
%! The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion
%K backward extrusion; contact stresses; die elastic deformation; pin load cell; finite element method
%X In this paper, the distribution of contact stresses along the die-workpiece interface as well as elastic deformation behavior of the die in the cold backward extrusion of steel billets have been investigated both experimentally and numerically. For the experiments, a special tooling set including a pin load cell measuring device was designed and made. Contact stresses were recorded at various points in time and at various locations during the extrusion process, i.e. for different punch strokes (part’s bottom thickness). The research focus was on determining the extrusion ratio’s influence on the distribution of the contact stresses and therefore the experiments were performed using five punches of different head diameters. In the next step, based on the measured contact stresses, radial displacements of the inner die wall were calculated by applying Lame’s equation. Furthermore, an extended finite element analysis of the investigated extrusion process was carried out using Simufact.forming software. The results of numerical simulations for the contact stresses were compared with experiments. The benefits and weaknesses of the pin load cell measuring technique and Lame’s formula when it is employed for determination of the die elastic deformation were also examined, as well as were the contribution of the die elastic deformation to dimensional errors of the extruded parts.
%U https://www.sv-jme.eu/article/the-influence-of-extrusion-ratio-on-contact-stresses-and-die-elastic-deformations-in-the-case-of-cold-backward-extrusion/
%0 Journal Article
%R 10.5545/sv-jme.2015.3051
%& 41
%P 10
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 62
%N 1
%@ 0039-2480
%8 2018-06-27
%7 2018-06-27
Pepelnjak, Tomaž, Mladomir  Milutinović, Miroslav  Plančak, Dragiša  Vilotić, Saša  Randjelović, & Dejan  Movrin.
"The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion." Strojniški vestnik - Journal of Mechanical Engineering [Online], 62.1 (2016): 41-50. Web.  22 Sep. 2021
TY  - JOUR
AU  - Pepelnjak, Tomaž 
AU  - Milutinović, Mladomir 
AU  - Plančak, Miroslav 
AU  - Vilotić, Dragiša 
AU  - Randjelović, Saša 
AU  - Movrin, Dejan 
PY  - 2016
TI  - The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2015.3051
KW  - backward extrusion; contact stresses; die elastic deformation; pin load cell; finite element method
N2  - In this paper, the distribution of contact stresses along the die-workpiece interface as well as elastic deformation behavior of the die in the cold backward extrusion of steel billets have been investigated both experimentally and numerically. For the experiments, a special tooling set including a pin load cell measuring device was designed and made. Contact stresses were recorded at various points in time and at various locations during the extrusion process, i.e. for different punch strokes (part’s bottom thickness). The research focus was on determining the extrusion ratio’s influence on the distribution of the contact stresses and therefore the experiments were performed using five punches of different head diameters. In the next step, based on the measured contact stresses, radial displacements of the inner die wall were calculated by applying Lame’s equation. Furthermore, an extended finite element analysis of the investigated extrusion process was carried out using Simufact.forming software. The results of numerical simulations for the contact stresses were compared with experiments. The benefits and weaknesses of the pin load cell measuring technique and Lame’s formula when it is employed for determination of the die elastic deformation were also examined, as well as were the contribution of the die elastic deformation to dimensional errors of the extruded parts.
UR  - https://www.sv-jme.eu/article/the-influence-of-extrusion-ratio-on-contact-stresses-and-die-elastic-deformations-in-the-case-of-cold-backward-extrusion/
@article{{sv-jme}{sv-jme.2015.3051},
	author = {Pepelnjak, T., Milutinović, M., Plančak, M., Vilotić, D., Randjelović, S., Movrin, D.},
	title = {The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {62},
	number = {1},
	year = {2016},
	doi = {10.5545/sv-jme.2015.3051},
	url = {https://www.sv-jme.eu/article/the-influence-of-extrusion-ratio-on-contact-stresses-and-die-elastic-deformations-in-the-case-of-cold-backward-extrusion/}
}
TY  - JOUR
AU  - Pepelnjak, Tomaž 
AU  - Milutinović, Mladomir 
AU  - Plančak, Miroslav 
AU  - Vilotić, Dragiša 
AU  - Randjelović, Saša 
AU  - Movrin, Dejan 
PY  - 2018/06/27
TI  - The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 62, No 1 (2016): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2015.3051
KW  - backward extrusion, contact stresses, die elastic deformation, pin load cell, finite element method
N2  - In this paper, the distribution of contact stresses along the die-workpiece interface as well as elastic deformation behavior of the die in the cold backward extrusion of steel billets have been investigated both experimentally and numerically. For the experiments, a special tooling set including a pin load cell measuring device was designed and made. Contact stresses were recorded at various points in time and at various locations during the extrusion process, i.e. for different punch strokes (part’s bottom thickness). The research focus was on determining the extrusion ratio’s influence on the distribution of the contact stresses and therefore the experiments were performed using five punches of different head diameters. In the next step, based on the measured contact stresses, radial displacements of the inner die wall were calculated by applying Lame’s equation. Furthermore, an extended finite element analysis of the investigated extrusion process was carried out using Simufact.forming software. The results of numerical simulations for the contact stresses were compared with experiments. The benefits and weaknesses of the pin load cell measuring technique and Lame’s formula when it is employed for determination of the die elastic deformation were also examined, as well as were the contribution of the die elastic deformation to dimensional errors of the extruded parts.
UR  - https://www.sv-jme.eu/article/the-influence-of-extrusion-ratio-on-contact-stresses-and-die-elastic-deformations-in-the-case-of-cold-backward-extrusion/
Pepelnjak, Tomaž, Milutinović, Mladomir, Plančak, Miroslav, Vilotić, Dragiša, Randjelović, Saša, AND Movrin, Dejan.
"The Influence of Extrusion Ratio on Contact Stresses and  Die Elastic Deformations in the Case of Cold Backward Extrusion" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 62 Number 1 (27 June 2018)

Authors

Affiliations

  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia 1
  • Faculty of Technical Sciences, University of Novi Sad, Serbia 2
  • Mechanical Engineering Faculty, University of Niš, Serbia 3

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 62(2016)1, 41-50

https://doi.org/10.5545/sv-jme.2015.3051

In this paper, the distribution of contact stresses along the die-workpiece interface as well as elastic deformation behavior of the die in the cold backward extrusion of steel billets have been investigated both experimentally and numerically. For the experiments, a special tooling set including a pin load cell measuring device was designed and made. Contact stresses were recorded at various points in time and at various locations during the extrusion process, i.e. for different punch strokes (part’s bottom thickness). The research focus was on determining the extrusion ratio’s influence on the distribution of the contact stresses and therefore the experiments were performed using five punches of different head diameters. In the next step, based on the measured contact stresses, radial displacements of the inner die wall were calculated by applying Lame’s equation. Furthermore, an extended finite element analysis of the investigated extrusion process was carried out using Simufact.forming software. The results of numerical simulations for the contact stresses were compared with experiments. The benefits and weaknesses of the pin load cell measuring technique and Lame’s formula when it is employed for determination of the die elastic deformation were also examined, as well as were the contribution of the die elastic deformation to dimensional errors of the extruded parts.

backward extrusion; contact stresses; die elastic deformation; pin load cell; finite element method