PAM-STAMP in the simulation of stamping process of an automotive component

Lubrication is one of the process variables that affect the quality of stamping sheet materials. Using a good lubricant can significantly reduce sciap rate and/or improve the quality of stamping. In this study, different types of lubricants were evaluated using strip draw test (SDT) and deep draw test (DDT) for stamping of galvannealed steel sheets. Einite element (EE) simulations were carried out to determine the coefficient of friction at tool-work piece interface during deep diawing under different lubrication conditions and blank holder forces. Elow stress data of materials under biaxial load which are used in EE simulations are obtained by viscous pressure bulge tests. SDT was used as a preliminary test to evaluate the relative performance of the lubricants. Lubricants that showed good performance in this test were tested using DDT. Dimensions of the formed strips and cups and the maximum applicable blank holder force to draw parts without fracturing were the criteria used for evaluation of lubricants in both tests. In general, it was possible to form cups with higher blank holder force when synthetic/water-based lubricants were applied to ¡he sheet. In conclusion, evaluated synthetic/water-based lubricants had better lubricity than petroleum-based lubricants.

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“…A similar effect has also been shown in Ref. [10], where PAM-STAMP simulations were conducted and the effect of COF on BHF was studied.…”

Section: Results Of Deep Drawsupporting

confidence: 75%

Evaluation of Stamping Lubricants in Forming Galvannealed Steels for Industrial Application

Subramonian

Kardes

Demiralp

et al. 2011

Journal of Manufacturing Science and Engineering

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“…As a result, the Hill 48 yield locus combined with the Krupkowski hardening law offered the lowest thickness deviation (2.4%) when values calculated from numerical simulations and the physical model were compared. The results comply with [24] and were also used for mild steel and drawing quality steel when the deep drawing process was numerically simulated [16,17,21,25]. The selection of a proper mathematical model for the yield locus and hardening law is even more important for metal sheets and processes, especially when new types of steel or springback phenomena are simulated [17,25,26].…”

Section: Discussionsupporting

confidence: 53%

“…Silva utilized Pam-Stamp software to re-evaluate the stamping process for a rear seat and a structural reinforcement when changing the blank thickness and conventional steel to high strength steel [16]. Choudhury optimized the die geometry and determined the safe limit of the blankholder forces for plain carbon steel, reinforced steel, and aluminum alloy [17]. Padmanabhan numerically simulated the deep drawing process of bottles for LPG (bottled gas) by using DD3IMP FE code.…”

Section: Introductionmentioning

confidence: 99%

Physical Modelling and Numerical Simulation of the Deep Drawing Process of a Box-Shaped Product Focused on Material Limits Determination

Tomáš

Evin

Kepič

et al. 2019

Metals

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Similitude theory helps engineers and scientists to accurately predict the behaviors of real systems through the application of scaling laws to the experimental results of a scale model related to the real system by similarity conditions. The theory was applied when studying the deep drawing process of a bathtub made from cold rolled low carbon aluminum-killed steel from the point of view of material limits. The bathtub model was created on the basis of geometric, physical, and mechanical similarity on a scale of 1:5. Thus, simulations and physical models were created. The simulation model was used to verify the combination yield locus/hardening law on the basis of comparing the thickness change. As a result, Hill 48/Krupkowski showed the minimal deviation by comparing data evaluated from numerical simulations and that measured on the physical model. Additionally, material anisotropy was modelled when virtual materials were defined from experimentally measured values of the plastic strain ratio. As an outcome, extra deep drawing quality steel with an average plastic strain ratio of rm ≥ 1.47 and an average strain hardening exponent of nm ≥ 0.23 must be used for the deep drawing of the bathtub.

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“…to lower tribological loads, however Choudhury et al (2006) have observed that, with the increase of friction coefficient the blank holder force decreases, Verma and Chandra (2006) concludes that the limiting drawing ratio (LDR) decreases with increase in the friction. On the other hand, Sutcliffe et al (2003) and Matuszak (2000) have shown that the lubrication regime is critical for formation of the transfer layer.…”

Section: Introductionmentioning

confidence: 99%

Experimental device for tribological measurement aspects in deep drawing process

Roizard¹,

Pothier²,

Hihn³

et al. 2009

Journal of Materials Processing Technology

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PAM-STAMP in the simulation of stamping process of an automotive component

Cited by 18 publications

References 14 publications

Evaluation of Stamping Lubricants in Forming Galvannealed Steels for Industrial Application

Evaluation of Stamping Lubricants in Forming Galvannealed Steels for Industrial Application

Physical Modelling and Numerical Simulation of the Deep Drawing Process of a Box-Shaped Product Focused on Material Limits Determination

Experimental device for tribological measurement aspects in deep drawing process

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