Springback is a critical issue in sheet metal forming, particularly in the V-bending process, where it affects the dimensional accuracy and product quality. The V-grooving technique, a method used for making housing and cover panels for consumer goods, allows for simpler and more accurate metal folding. This study investigates the effect of the V-grooving technique on springback behavior in SS304 stainless steel sheets. The experimental work was designed using the Taguchi method with an L18 orthogonal array, considering four process parameters: sheet thickness, rolling direction, nose radius of the grooving tool, and grooving depth. Analysis of variance (ANOVA) and signal-to-noise (SN) ratio analysis were conducted to identify significant factors influencing springback. The results reveal that the depth of the groove is the most influential parameter, and deeper grooves effectively reduce the springback by decreasing the stiffness of the material along the bend line. However, excessive grooving can lead to cracking, indicating a trade-off between springback reduction and structural integrity. Additionally, greater sheet thickness resulted in higher springback, while alignment with the rolling direction reduced it due to material anisotropy. The findings suggest that controlled V-grooving is a promising method for minimizing springback in precision sheet forming, though optimization is essential to prevent material failure.

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Effect of V-Grooving Technique on Springback Behavior of SS304 Sheet in V-Bending Process: An Experimental Study

  • Anh-Chuong Le,
  • Hoan Nguyen,
  • Anh-Son Tran,
  • Quoc-Nguyen Banh,
  • Minh-Tuan Ho

摘要

Springback is a critical issue in sheet metal forming, particularly in the V-bending process, where it affects the dimensional accuracy and product quality. The V-grooving technique, a method used for making housing and cover panels for consumer goods, allows for simpler and more accurate metal folding. This study investigates the effect of the V-grooving technique on springback behavior in SS304 stainless steel sheets. The experimental work was designed using the Taguchi method with an L18 orthogonal array, considering four process parameters: sheet thickness, rolling direction, nose radius of the grooving tool, and grooving depth. Analysis of variance (ANOVA) and signal-to-noise (SN) ratio analysis were conducted to identify significant factors influencing springback. The results reveal that the depth of the groove is the most influential parameter, and deeper grooves effectively reduce the springback by decreasing the stiffness of the material along the bend line. However, excessive grooving can lead to cracking, indicating a trade-off between springback reduction and structural integrity. Additionally, greater sheet thickness resulted in higher springback, while alignment with the rolling direction reduced it due to material anisotropy. The findings suggest that controlled V-grooving is a promising method for minimizing springback in precision sheet forming, though optimization is essential to prevent material failure.