scholarly journals Deformation of a cross section of 6063 alloy circular tube by rotary draw bending.

1994 ◽  
Vol 44 (9) ◽  
pp. 475-479 ◽  
Author(s):  
Minobu SUKIMOTO ◽  
Yuichi TAGUCHI ◽  
Masashi SAKAGUCHI ◽  
Hitoshi AKIYOSHI ◽  
Junichi ENDOU
Keyword(s):  
Cross Section ◽  
Circular Tube ◽  
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.

scholarly journals Reduction in Flatness Using Axial Compressive Forcein Rotary Draw Bending of Circular Tube

2008 ◽  
Vol 49 (572) ◽  
pp. 896-900 ◽  
Author(s):  
Kazuhito TAKAHASHI ◽  
Takashi WATANABE ◽  
Takashi KUBOKI ◽  
Makoto MURATA ◽  
Kazuhiko ONO ◽  
...  
Keyword(s):  
Circular Tube ◽  
Rotary Draw Bending ◽  
Draw Bending

Deformation Behaviors of Tube Rotary-Draw Bending Filled with Steel Balls

2011 ◽  
Vol 328-330 ◽  
pp. 1403-1407 ◽  
Author(s):  
Song Chao Shi ◽  
Lian Fa Yang ◽  
Chen Guo
Keyword(s):  
Cross Section ◽  
Wall Thickness ◽  
Rotary Draw Bending ◽  
Simulation Based ◽  
Bending Process ◽  
Deformation Behaviors ◽  
Draw Bending ◽  
Steel Balls ◽  
Internal Pressures

Wrinkling, wall thickness overthinning and cross-section distorting are main defects that seriously affect the forming quality of the tube in bending process. In this paper, numerical simulation based on PAM-STAMP 2G is conducted for the tube rotary-draw bending filled with steel balls as pressure transferring medium to analyze the deformation behaviors under various internal pressures. The results show that, tube bending filled with steel balls as pressure transferring medium can effectively restrain the defects of wrinkling and cross-section distorting. In addition, wrinkling and cross-section distorting of the bent tube decrease, the wall thickness thickening at the intrados of the bent tube decreases while the wall thickness thinning at the extrados increases with the internal pressure.

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