Evaluation of frictional conditions for various tool materials and lubricants using the injection-upsetting method

Nishimura, Takuya; Sato, Teisuke; Tada, Yasuhiro

doi:10.1016/0924-0136(94)01759-t

Cited by 11 publications

(3 citation statements)

References 3 publications

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“…Moreover, the buckling for large deformation limited the application of the ring compression test. For these reasons, as alternative to the ring compression test, backward extrusion test [4], spike forging [5] and injection upsetting [6] methods were proposed. But, these methods also required a non-linear calibration curve to determine the friction coefficient.…”

Section: Introductionmentioning

confidence: 99%

Practical determination of friction coefficient of Al 3003 for forming of backward extruded part using simple tip test and inverse finite element analysis

Bong¹,

Leem²,

Kim

et al. 2016

Met. Mater. Int.

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The friction coefficient for aluminum alloy 3003 was determined from a specially designed tip test and finite element (FE) simulations. Measured radial tip distance after the tip test was compared to the FE simulations by iteratively changing friction coefficient and the best fitting friction coefficient was determined. To consider strain rate effect on flow stress response during large plastic deformation, a new combined Hollomon-Voce hardening law was proposed. The friction under three different surface conditions was considered by the proposed inverse FE analysis. The results showed that there was obvious strain rate effect on the predicted punch load in the tip test. Moreover, the different friction coefficients were numerically determined for punch/workpiece and die/workpiece interfaces. Two possible causes of this difference were discussed by the analysis on contact normal pressure and slip velocity distributions of the two interfaces.

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Section: Introductionmentioning

confidence: 99%

Practical determination of friction coefficient of Al 3003 for forming of backward extruded part using simple tip test and inverse finite element analysis

Bong¹,

Leem²,

Kim

et al. 2016

Met. Mater. Int.

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show abstract

“…However, most of these methods such as spike forging test [4,5], bucket test [6], injection upsetting [7], and combined forward and backward extrusions [8][9][10][11][12] require nonlinear calibration curves and test equipments are rather complex in design and operation. Nakamura et al [13] proposed a friction testing method based on backward extrusion, but in this method, the dependency on forming load was too high.…”

Section: Introductionmentioning

confidence: 99%

Finite element simulation of tip test with an aluminum alloy

Im¹,

Kang²,

Cheon³

et al. 2004

Journal of Materials Processing Technology

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“…17 Investigations on friction behavior of WC/C-layers on a modified Amsler tribometer have shown a lifetime increase by a factor of 1000. 18 On the other hand, those lubricants have to be removed before further processing.…”

Section: State Of Researchmentioning

confidence: 99%

Dry metal forming: Definition, chances and challenges

Vollertsen

Schmidt

2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

109

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In metal forming, lubricants are still used to prevent corrosion, to reduce friction, wear and tool load as well as to protect the workpieces and intermediates. In economic and ecological points of view, the challenge is the avoidance of lubricant usage. Within this article we define the term of dry metal forming, a technology which contributes an approach to establish green technology in mass production. Regarding this, the benefits of this technology are shown. Three different approaches exist to achieve a dry forming process: ceramic tools, self-lubricating coating systems and hard material coatings. Concerning this matter, the state of research in dry metal forming is reviewed within this paper.

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Evaluation of frictional conditions for various tool materials and lubricants using the injection-upsetting method

Cited by 11 publications

References 3 publications

Practical determination of friction coefficient of Al 3003 for forming of backward extruded part using simple tip test and inverse finite element analysis

Practical determination of friction coefficient of Al 3003 for forming of backward extruded part using simple tip test and inverse finite element analysis

Finite element simulation of tip test with an aluminum alloy

Dry metal forming: Definition, chances and challenges

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