Novel flexible cores in rotary draw bending forming: applied for the commercial vehicle anti-collision beam with rectangular ribbed (日-shaped) section

2021 ◽  
Author(s):  
Jicai Liang ◽  
Tian Liang ◽  
Yi Li ◽  
Ce Liang
Keyword(s):  
Commercial Vehicle ◽  
Rotary Draw Bending ◽  
Draw Bending ◽  
Shaped Section

Investigation of Neutral Axis Shifting in Rotary Draw Bending Processes for Tubes

2014 ◽  
Vol 85 (7) ◽  
pp. 1209-1214 ◽  
Author(s):  
Bernd Engel ◽  
Hassan Raheem Hassan
Keyword(s):  
Neutral Axis ◽  
Rotary Draw Bending ◽  
Draw Bending

Characteristics of Rotary Draw-Bent Tubes for the Hydroforming

2011 ◽  
Vol 213 ◽  
pp. 320-324
Author(s):  
Byeong Don Joo ◽  
Jeong Hwan Jang ◽  
Hyun Jong Lee ◽  
Young Hoon Moon
Keyword(s):  
Cross Section ◽  
Structural Strength ◽  
Dimensional Accuracy ◽  
Thickness Variation ◽  
Important Process ◽  
Rotary Draw Bending ◽  
Higher Dimensional ◽  
Bending Process ◽  
Geometric Size ◽  
Draw Bending

Hydroformed parts have higher dimensional accuracy, structural strength, and dimensional repeatability. The pre-bending process is an important process for the successful hydroforming in the case where the perimeter of the blank is nearly the same as that of final product. At initial pre-bending stage, the variations of wall thickness and cross-section have effects on the accuracy of final products and quality. Because of a relatively excellent productive velocity, geometric size precision and reliance of product qualities, rotary draw bending is widely used. This study shows the bendability such as cross-section ovality, springback ratio and thickness variation in the various conditions of materials.

Numerical Research on High-Strength Rectangular Section Steel Tube in Rotary-Draw Bending

2014 ◽  
Vol 620 ◽  
pp. 417-423 ◽  
Author(s):  
Zhong Wen Xing ◽  
Zhi Wei Xu ◽  
Hong Liang Yang ◽  
Cheng Xi Lei
Keyword(s):  
High Strength ◽  
Element Model ◽  
Steel Tube ◽  
Rotary Draw Bending ◽  
Rectangular Section ◽  
Control Variate ◽  
Fillet Radius ◽  
Bending Process ◽  
Bending Radius ◽  
Draw Bending

A finite element model of high-strength rectangular section steel tube in rotary-draw bending is established to study the stress and strain in the bending process. Based on control variate method, this paper analyzes the influence laws of three geometric parameters on rotary-draw bending. The results show that bending radius is the most important factor, forming property increases significantly with the increase of bending radius, the trends of cracking and wrinkling are all decreased. The thickness of wall has influence on the strain of inwall, thinner tube may cause crack and wrinkle. Fillet radius has no effect on ektexine, the strain of inwall decreases slightly with the increase of fillet radius.

scholarly journals 309 Study on wrinkles during rotary draw bending forming

2012 ◽  
Vol 2012.50 (0) ◽  
pp. 30901-30902
Author(s):  
Yoshitaka INOUE ◽  
Hirohumi IWASAKI ◽  
Keiji OGI ◽  
Xia ZHU ◽  
Nagatoshi OKABE
Keyword(s):  
Rotary Draw Bending ◽  
Draw Bending

scholarly journals Rotary-draw-bending using tools with reduced geometries

2018 ◽  
Vol 15 ◽  
pp. 804-811 ◽  
Author(s):  
Christopher Heftrich ◽  
Rainer Steinheimer ◽  
Bernd Engel
Keyword(s):  
Rotary Draw Bending ◽  
Draw Bending
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