Evaluation of Stamping Lubricants in Forming Galvannealed Steels for Industrial Application

Subramonian, Soumya; Kardes, Nimet; Demiralp, Yurdaer; Jurich, Milan; Altan, Taylan

doi:10.1115/1.4003948

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…The drawbead friction test was also used by Figueiredo et al 66 to show the strong dependency of die surface roughness on μ variation. Ju et al 67 and Subramonian et al 68 used the cup deep drawing process as a simulative test to characterize the lubricants for stamping of aluminum alloy and steel grade sheets. They minimized the error between experimental and finite element simulation data to evaluate μ .…”

Section: Measurement Of Friction In Manufacturingmentioning

confidence: 99%

Friction in micromanufacturing

Dixit

Yadav

Narayanan

et al. 2018

Journal of Micromanufacturing

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Friction plays a vital role in several micromanufacturing processes. Since the eighteenth century, the phenomenon of friction has been widely investigated, but it is still one of the least understood subjects. In this article, a review of studies on friction in micromanufacturing is presented with a background of existing knowledge at the macro level. While there is a general recognition that force of friction is several times higher in micromanufacturing than that in conventional manufacturing, there is a dearth of robust and reliable models, especially suited for micromanufacturing. At present, a pocket model can be considered as the only friction model for micromanufacturing, which demonstrates how friction increases considerably with diminishing size under lubricated conditions. However, this model does not capture the physics of friction under dry conditions, which may be heavily dependent on the grain size as well. There are several contradictory results in the literature, particularly with regard to the roles of surface roughness and temperature. Thus, there is a need to carry out an in-depth investigation on the tribology of micromanufacturing processes.

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Section: Measurement Of Friction In Manufacturingmentioning

confidence: 99%

Friction in micromanufacturing

Dixit

Yadav

Narayanan

et al. 2018

Journal of Micromanufacturing

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“…In recent studies, dry film lubricants have been used in forming to avoid scratching and galling of the tools [4,5]. Regarding the evaluation of various lubricants, twist compression test [6], deep drawing test (including CDT [7], and strip drawing test [8]) are found to be most practical testing methods. Using inverse analysis and the measured data from CDT tests, the CoF can be estimated with FE simulation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Lubricants for Stamping of Al 5182-O Aluminum Sheet Using Cup Drawing Test

Mao

Malpica

et al. 2015

Journal of Manufacturing Science and Engineering

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Lubricants are necessary to avoid adhesion, galling, and scratching in aluminum stamping processes. In this study, various lubricants, including dry lubes and wet lubes, were evaluated using cup drawing test (CDT) for stamping of Al 5182-O aluminum sheets. The effects of surface texturing, with electro-discharge texturing (EDT) and mill finish (MF), on the friction behavior were also investigated. Furthermore, the methodology to evaluate the performance of lubricants was established based on (a) maximum applicable blank holder force (BHF) and (b) draw-in length in flange or flange perimeter of formed cups. Finite element (FE) simulations were carried out to determine the coefficient of friction (CoF) at tool–workpiece interface during deep drawing under different lubrication conditions. Flow stress data of Al 5182-O material were obtained using viscous pressure bulge (VPB) and tensile tests. In this study, it was confirmed that, in forming Al 5182-O, dry film lubricants have better lubricity than wet lubricants. A better lubrication condition was found with EDT surface texture.

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“…Deep-drawing is also regarded as a laboratory test that can be used to assess the lubricant performance [6][7][8][9]. According to [7] the lower is the punch force, the better is the lubricant.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of deep drawing force under different friction conditions

Lăzărescu

Banabic

2017

MATEC Web Conf.

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Abstract. The purpose of this study is to investigate the variation of the required punch load during the deep drawing process under different friction conditions. In this regards, several deep-drawing tests of cylindrical cups were conducted under four friction conditions at the toolblank interface. The first case was the dry deep-drawing, considered as a reference friction condition, while in the other three cases hydraulic oil, lithium-based grease and animal fat were used as lubricants. For each friction case, three levels of blank holding force were adopted, namely 10, 20 and 25 kN. The finite element simulation of the deep-drawing process was used to generate a set of calibration curves. By overlapping the experimental load-stroke curves on the calibration curves, the friction coefficient was estimated for each friction case.

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Evaluation of Stamping Lubricants in Forming Galvannealed Steels for Industrial Application

Cited by 5 publications

References 7 publications

Friction in micromanufacturing

Friction in micromanufacturing

Evaluation of Lubricants for Stamping of Al 5182-O Aluminum Sheet Using Cup Drawing Test

Evaluation of deep drawing force under different friction conditions

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