Prevention of defects by optimizing mandrel position and shape in rotary draw bending of copper tube with thin wall
TLDR
In this article, a series of experiments and a finite element analysis was carried out in order to investigate an optimum condition of a mandrel for preventing defects in a rotary draw bending of a copper tube with thin wall.About:
This article is published in Procedia Manufacturing.The article was published on 2018-01-01 and is currently open access. It has received 11 citations till now. The article focuses on the topics: Mandrel & Bend radius.read more
Citations
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Investigation on the influence of mandrel on the forming quality of thin-walled tube during free bending process
TL;DR: In this paper, the principle of free bending with mandrel was theoretically deduced, which was used to explain the mechanism of the supporting force provided by the mandrel on the deformation behavior of tube.
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Deformation Property and Suppression of Ultra-Thin-Walled Rectangular Tube in Rotary Draw Bending
TL;DR: In this article, an aluminum alloy rectangular tube with a height H 0 = 20 mm, width W 0 = 10 mm, wall thickness t 0 = 0.5 mm (H0/t0 = 40) was fabricated and investigated the deformation properties in the rotary draw bending.
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Introduction of a new method for bending of AISI 304L stainless steel micro-tubes with micro-wire mandrel
TL;DR: In this paper, a micro-wire mandrel was used to bend metal micro-tubes in a critical bending ratio, which allowed the micro-tube to bend at room temperature.
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Size effect mechanism of cross-section deformation and section hollow coefficient-bending degree of the thin-walled composite bending tube
TL;DR: In this article, a new method of measuring the size effect of composite tubes is established, based on two dimensionless variables of section hollow coefficient λ and bending degree w to describe the sectional dimensional characteristics.
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A Study on the Optimization of Joint Mandrel Shape for Manufacturing Long Type Elbow Using Push Bending Process
Yea-Jin Yang,Choon-Man Lee +1 more
TL;DR: In this paper, a joint type mandrel was added to a long-type elbow made of C1220 material for weight reduction, and the forming analysis software DEFORM was used to confirm the change of the wrinkle and the thickness of the bent pipe.
References
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Friction role in bending behaviors of thin-walled tube in rotary-draw-bending under small bending radii
TL;DR: For contact dominated rotary-draw-bending of thin-walled tube, friction role should be focused to achieve precision bending under small bending radii ratio (Rd/D) as discussed by the authors.
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Countermeasures against undesirable phenomena in the draw-bending process for extruded square tubes
Noah Utsumi,Syuji Sakaki +1 more
TL;DR: In this paper, the authors used the finite element method (FEM) to analyze the draw-bending process of extruded aluminum square tubes and achieved a bend degree of 0.42 without any defects.
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A new schedule-free mandrel-less bending method for straight/pre-shaped long tubes
TL;DR: In this article, a new schedule-free mandrel-less draw-bending method was proposed to achieve high cross-sectional precision for straight and pre-shaped long tube, for which conventional methods lacking innovation are useless.
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Bending Deformation Behavior of Aluminium Extruded Various Sections with Laminated Elastic Mandrel on Draw Bending
TL;DR: In this paper, the relationship between the behavior of undesirable deformation and cross-sectional shape of workpiece was clarified in the draw bending experiment using finite element analysis (FEA).