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Influence of friction parameters on springback and bend force in air bending of electrogalvanised steel sheet: an experimental study

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Abstract

This investigation analyses the effect of friction which is influenced by the parameters including type of lubricant, surface roughness of the sheet, die geometry and punch velocity on springback and bend force of electrogalvanised steel sheet in air-bending process experimentally. It is observed that the decrease in friction increases the springback and reduces the bend force. This effect is evident in case of high-viscosity lubricant, low surface roughness, larger die radius and higher punch velocity.

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Abbreviations

d p :

Punch travel, mm

E :

Young’s modulus, GPa

L s :

Length of the sheet, mm

R a :

Surface roughness, μm

R d :

Die radius, mm

R p :

Punch radius, mm

T :

Sheet thickness, mm

t c :

Coating thickness, μm

V p :

Punch velocity, mm/s

W d :

Die opening, mm

W s :

Width of the sheet, mm

σ y :

Yield strength, MPa

σ u :

Ultimate tensile strength, MPa

θ i :

Bend angle (during loading), °

θ f :

Bend angle (after unloading), °

∆θ:

Springback angle, °

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Authors and Affiliations

  1. Department of Mechanical Engineering, RVS College of Engineering and Technology, Dindigul, 625 005, Tamilnadu, India

    R. Srinivasan

  2. Department of Mechanical Engineering, PSNA College of Engineering and Technology, Dindigul, 624 622, Tamilnadu, India

    D. Vasudevan

  3. Department of Mechanical Engineering, VV College of Engineering, Tisaiyanvilai, 624 657, Tamilnadu, India

    P. Padmanabhan

Authors
  1. R. Srinivasan
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  2. D. Vasudevan
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  3. P. Padmanabhan
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Correspondence to R. Srinivasan.

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Technical Editor: Alexandre Abrão.

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Srinivasan, R., Vasudevan, D. & Padmanabhan, P. Influence of friction parameters on springback and bend force in air bending of electrogalvanised steel sheet: an experimental study. J Braz. Soc. Mech. Sci. Eng. 36, 371–376 (2014). https://doi.org/10.1007/s40430-013-0097-8

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  • DOI: https://doi.org/10.1007/s40430-013-0097-8

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