Experimental Investigation of the Influence of Punch Velocity on the Springback Behavior and the Flat Length in Free Bending

Krinninger, Michael; Opritescu, Daniel; Golle, Roland; Volk, Wolfram

doi:10.1016/j.procir.2015.12.137

Cited by 21 publications

(12 citation statements)

References 2 publications

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“…Bu gerilemelerin dengede kalması durumunda da sac malzemedeki deformasyon tamamlanmaktadır. Bükme işleminde, kalıp açısının büyümesi ile birlikte bükme momenti artmakta [8] ve daha büyük bükme açısı daha büyük deformasyon alanına sebep olmaktadır [9]. Deformasyon alanı ve bükme momentinin artmasının sonucu olarak geri esneme açısının artmasına neden olan elastik enerji artmaktadır.…”

Section: Sonuçlarunclassified

Experimental investigation of effect of process parameters on springback in v bending process

Karaağaç¹,

Uluer²

2017

Pamukkale J Eng Sci

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Section: Sonuçlarunclassified

Experimental investigation of effect of process parameters on springback in v bending process

Karaağaç¹,

Uluer²

2017

Pamukkale J Eng Sci

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“…IOP Publishing doi:10.1088/1742-6596/2345/1/012018 2 Krinninger et al [3] studied the parameters that affect the free bending (L-shape bending). These included the bending angle, punch radius, workpiece width, rolling direction and punch speed.…”

Section: Introductionmentioning

confidence: 99%

Preforming strategies in correcting the spring-back from the U-shape bending

Lin¹,

Lin²

2022

J. Phys.: Conf. Ser.

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Bending accuracy is difficult to predict in multiple profile-rolling because of the complexity in the distribution of the residual stress. The adjustment of the individual rolls is usually time-consuming. Therefore, coining and embossing processes can be implemented as the preforming measures to correct the spring-back or spring-forward defect. In this work, U-shape bending preformed with coining and embossing was investigated for the validity of the correction of the bending accuracy. Both hot-dip galvanized steel SGC 340 and aluminium alloy AA 6016 plates, with a thickness of 1 mm, were tested. Preforming with coining or embossing was conducted on the inner or the outer corner of the plates. Both the FE simulation and experiment were carried out. The result shows that preforming with coining on the inner or outer corners can increase the amount of spring-back. Preforming with embossing on the inner corner can also increase the amount of spring-back. However, the amount of spring-back reduces or even spring-forward occurs in preforming with embossing on the outer corner. Attributed to the distribution of residual stress is discrete after U-shape bending, a steady trend of the correction for spring-back was not observed.

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“…Lower punch angle is creating higher springback as compared to higher punch angle and the residual stresses in pre bend strip showed more impact on springback as compared to flat strip [6]. The springback decreases with the increase in the punch velocity [7]. The springback is lower with an increase in the depth of compression and Young"s modulus and increasing thickness or decreasing the bending angle.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pre-Tension on the Springback Behavior of the Yellow Brass

Zabon¹,

Abed²

2020

ETJ

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Springback forecasting of sheet formation is constantly remarkable problem in the métier, due to their influence the great in the definitive shape of the product. Study presents effects of pretension in tow rolling direction (0, 45 degree) on the springback behavior of the (Brass 65-35) sheet under V-die bending by an experimental. The pretension ranges from five different pretensions levels starting from 11% to 55% from total strain in each rolling direction by increment of 11%. used in punching that was performed at a constant deformation velocity of (5 mm/min) then bent on a 90° V-shaped die for the springback evaluation. The results from experiment indicate that the springback increase with pretension ratio and the springback in 45 degree is higher in rolling direction.

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Experimental Investigation of the Influence of Punch Velocity on the Springback Behavior and the Flat Length in Free Bending

Cited by 21 publications

References 2 publications

Experimental investigation of effect of process parameters on springback in v bending process

Experimental investigation of effect of process parameters on springback in v bending process

Preforming strategies in correcting the spring-back from the U-shape bending

Effect of Pre-Tension on the Springback Behavior of the Yellow Brass

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