• DOI:10.1115/1.4033996
• Corpus ID: 53443577

Temperature Increase in Forming of Advanced High-Strength Steels Effect of Ram Speed Using a Servodrive Press

@article{Fallahiarezoodar2016TemperatureII,
  title={Temperature Increase in Forming of Advanced High-Strength Steels Effect of Ram Speed Using a Servodrive Press},
  author={Ali Fallahiarezoodar and Ruzgar Peker and Taylan Altan},
  journal={Journal of Manufacturing Science and Engineering-transactions of The Asme},
  year={2016},
  volume={138},
  pages={094503}
}

• A. Fallahiarezoodar, Ruzgar Peker, T. Altan
• Published 1 September 2016
• Materials Science
• Journal of Manufacturing Science and Engineering-transactions of The Asme

In forming of AHSS the temperature increase at die/sheet interface affects the performance of lubricants and die wear. This study demonstrates that Finite Element (FE) analysis, using commercially available software, can be used to estimate temperature increase in single as well as in multiple stroke operations. To obtain a reliable numerical process design, the knowledge of the thermomechanical properties of the sheet as well as the tools is essential. Using U-channel drawing the FE model has been validated by comparing predictions with experimental results. The effect of ram speed and stroking rate (stroke per minutes) upon temperature increase in real production-like operation have been investigated. Deep drawing of CP800 and DP590 blanks in a servo drive press, using an industrial scale die, has been studied. Thinning distribution and temperatures in the drawn part have been investigated in single and multiple forming operations. It is found that temperatures may reach several hundreds degrees and affect the coefficient of friction (COF). The values of COF under production-like conditions were compared to that obtained from laboratory experiments. This study illustrates that in forming AHSS, a) the temperature increase at the die/ sheet interface is relatively high and should be considered in process design stage b) the lubricant performance is significantly affected by the ram speed and sheet/die interface temperature during deformation.