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

Srinivasan, R.; Vasudevan, D.; Padmanabhan, P.V.A.

doi:10.1007/s40430-013-0097-8

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…Their results suggest that the Fe content of the Zn-Fe coating should range from 7% to 12%. Srinivasan et al [ 29 ] studied the effects of friction on the springback of steel sheets in air bending. Their results suggest that a decrease in friction increases the springback and reduces the bending force.…”

Section: Introductionmentioning

confidence: 99%

Impact of Blank Holding Force and Friction on Springback and Its Prediction of a Hat-Shaped Part Made of Dual-Phase Steel

et al. 2023

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Formability and its prediction of high-strength steels is an important research subject for forming specialists and researchers in this field. Springback and its accurate prediction of high-strength steels are very common issues in metal forming processes. In this article, the impact of blank holding force and friction on the parts springback made of dual-phase steel was studied. Numerical predictions of the springback effect were conducted using nine combinations of yield criteria and hardening rules. Results from experiments were evaluated and compared with results from numerical simulations. The use of lower blank holding forces and PE foil can reduce springback by a significant amount. Numerical simulations where the Yoshida-Uemori hardening rule was applied produced more accurate springback prediction results compared to simulations that used Krupkowski and Hollomon’s isotropic hardening rules in number of cases.

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Section: Introductionmentioning

confidence: 99%

Impact of Blank Holding Force and Friction on Springback and Its Prediction of a Hat-Shaped Part Made of Dual-Phase Steel

et al. 2023

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“…The change in geometry of a stamped item must be compensated for, which raises the cost of manufacture [1]. After the tool is removed from the part, the component's dimensions change, and the stresses and strains in the material that underwent deformation change also [2]. The stamped portion is typically overbent to counteract this effect.…”

Section: Introductionmentioning

confidence: 99%

Determination of influential springback parameters in U-bending test

Dessie

Lukács

2023

Pollack

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U-bending tests are the most common method to predict springback and are influenced by the process and geometrical variables in addition to material behaviour. It needs a numerical study at a high level with many variables to reduce try-out time and loop. In this study, the U-bending test of DC01 steel has been researched numerically and experimentally to govern the influential parameters. The numerical analysis was conducted using AutoForm-Sigma code. The die radius has an excessive influence on the change of flange angle than the punch radius, but the punch radius has the greatest influence on the variation of the sidewall angle. The coefficient of friction played a great impact on both flange and sidewall angle deviation and its influence grows stronger as the blank holding force increases.

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“…Many researchers [11][12][13][14][15] discussed various analytical and semiinvestigative methods to predict the springback effect. Srinivasan et al 16 analyzed the effect of friction on springback and reported that springback reduces with a decrease in friction and decreasing the bending force. The friction depends on the type of lubricant used, die geometry, and punch velocity.…”

Section: Introductionmentioning

confidence: 99%

The experimental investigation of springback and roughness parameters in the three-point forming process using terpolymer punch

Arunkumar¹,

Ravichandran²,

Varatharajulu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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By the application of the three-point metal forming process, copious shapes can be formed. While doing the forming process, various unavoidable sheet metal defects will occur. This paper predominantly emphasizes springback and roughness defects and investigates the effects of these parameters with terpolymer Acrylonitrile Butadiene Styrene (ABS) fiber tool punch. Low-cost tooling and quality part development benefit from fiber tool punch over traditional steel tool punch. The springback and surface roughness are analyzed in the AA6061 sheet using steel and fiber punch in three-point U-bending operations, which are carried out as per ASTM standards. For this purpose, steel and fiber punch with nose diameters of 4, 8, and 12 mm and sheet metals of thicknesses 1 and 2 mm are used. The 8%–10% reduction in springback is achieved in fiber punch than steel punch. Also, the fiber punch offers 10%–47%better surface roughness than the steel punch. As the diameter of the punch increases, the roughness value also increases irrespective of the punch material. The fiber – reinforced ABS punch presents an attractive opportunity to reduce the springback effect and improve the surface quality of the finished product.

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

Cited by 9 publications

References 16 publications

Impact of Blank Holding Force and Friction on Springback and Its Prediction of a Hat-Shaped Part Made of Dual-Phase Steel

Impact of Blank Holding Force and Friction on Springback and Its Prediction of a Hat-Shaped Part Made of Dual-Phase Steel

Determination of influential springback parameters in U-bending test

The experimental investigation of springback and roughness parameters in the three-point forming process using terpolymer punch

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