In forming of advanced high-strength steel (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 thermal and mechanical properties of the sheet as well as the tools is essential. Using U-channel drawing the thermomechanical FE model has been validated by comparing predictions with experimental results. The effect of ram speed and stroking rate (stroke per minute (SPM)) upon temperature increase in real productionlike operation have been investigated. Deep drawing of CP800 and DP590 sheets in a servodrive 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 100 deg and affect the coefficient of friction (COF). The values of COF under productionlike 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, and (b) the lubricant performance is significantly affected by the ram speed and sheet/die interface temperature during deformation.
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September 2016
Technical Briefs
Temperature Increase in Forming of Advanced High-Strength Steels Effect of Ram Speed Using a Servodrive Press
Ali Fallahiarezoodar,
Ali Fallahiarezoodar
Center for Precision Forming,
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: fallahiarezoodar.1@osu.edu
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: fallahiarezoodar.1@osu.edu
Search for other works by this author on:
Ruzgar Peker,
Ruzgar Peker
Center for Precision Forming,
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: peker.4@osu.edu
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: peker.4@osu.edu
Search for other works by this author on:
Taylan Altan
Taylan Altan
Center for Precision Forming,
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: altan.1@osu.edu
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: altan.1@osu.edu
Search for other works by this author on:
Ali Fallahiarezoodar
Center for Precision Forming,
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: fallahiarezoodar.1@osu.edu
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: fallahiarezoodar.1@osu.edu
Ruzgar Peker
Center for Precision Forming,
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: peker.4@osu.edu
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: peker.4@osu.edu
Taylan Altan
Center for Precision Forming,
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: altan.1@osu.edu
The Ohio State University,
339 Baker Systems,
9171 Neil Avenue,
Columbus, OH 43210
e-mail: altan.1@osu.edu
Manuscript received January 15, 2016; final manuscript received June 21, 2016; published online July 19, 2016. Assoc. Editor: Matteo Strano.
J. Manuf. Sci. Eng. Sep 2016, 138(9): 094503 (7 pages)
Published Online: July 19, 2016
Article history
Received:
January 15, 2016
Revised:
June 21, 2016
Citation
Fallahiarezoodar, A., Peker, R., and Altan, T. (July 19, 2016). "Temperature Increase in Forming of Advanced High-Strength Steels Effect of Ram Speed Using a Servodrive Press." ASME. J. Manuf. Sci. Eng. September 2016; 138(9): 094503. https://doi.org/10.1115/1.4033996
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