Springback and Longitudinal Bow in Chain-Die Forming U and Hat Channels

Published on Mar 22, 2021
· DOI :10.21203/RS.3.RS-188381/V1
Zhenye Liang1
Estimated H-index: 1
,
Liu Yang1
Estimated H-index: 1
+ 5 AuthorsYinghong Peng25
Estimated H-index: 25
(SJTU: Shanghai Jiao Tong University)
Source
Abstract
References28
Newest
#1Zhen Qian (UQ: University of Queensland)H-Index: 4
#2Yong Sun (UQ: University of Queensland)H-Index: 5
Last. Shichao Ding (UQ: University of Queensland)H-Index: 8
view all 7 authors...
Abstract The Chain-die forming process is a novel sheet metal forming technology which can be considered as a continuous stamping process. The approach aims to reduce or even eliminate the redundant deformation when manufacturing advanced high strength steel (AHSS) products by utilizing a virtual roll with sufficiently large radius. In previous researches, single-stand finite element models were employed to investigate the characteristics of the Chain-die forming process assuming no interaction ...
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#1Yaguang Li (SJTU: Shanghai Jiao Tong University)H-Index: 5
#2Zhenye Liang (SJTU: Shanghai Jiao Tong University)H-Index: 1
Last. Lei ShiH-Index: 4
view all 8 authors...
Chain-die forming is an emerging technique for manufacturing AHSS component as an alternative to roll forming. The pronounced springback of AHSS due to their high strength is a key factor in chain-die blocks design. In this paper, a modified Chaboche hardening model that assumes a Hollomon–Voce combined equation and incorporates variation of elastic modulus is established to better describe hardening behaviors of AHSS. An analytical method for rapid prediction of springback of a U-channel is dev...
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#1Ming Zhou (SJTU: Shanghai Jiao Tong University)H-Index: 1
#2Yonghao Li (SJTU: Shanghai Jiao Tong University)H-Index: 1
Last. Jun Chen (SJTU: Shanghai Jiao Tong University)H-Index: 151
view all 5 authors...
Abstract Advanced High Strength Steel (AHSS) sheet metals have been widely used in automotive structures due to its safety performance and lightweight potentials, and some AHSS materials have been found more sensitive to edge crack during the stamping process. The tensile property of the sheared edge has great influence on flangability for AHSS. In the present work, the effects of the blanking clearance and shear angle on the quality of the sheared edge and subsequent tensile property for QP980 ...
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#1Ranko Radonjic (University of Stuttgart)H-Index: 4
#2Mathias Liewald (University of Stuttgart)H-Index: 11
Abstract Ultra-high-strength steels (UHSS) offer exceptional opportunities in car body manufacturing regarding the improvement of passenger safety as well as the reduction of total vehicle weight. However, springback represents a serious problem when forming such sheet metal materials. In this context, a new approach that can be used for significant reduction of springback was developed at Institute for Metal Forming, University of Stuttgart (IFU). The uniqueness of this approach is the alternat...
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#1Aditya D. Deole (Deakin University)H-Index: 5
#2Matthew Barnett (Deakin University)H-Index: 64
Last. Matthias Weiss (Deakin University)H-Index: 20
view all 3 authors...
Abstract In this study, a ductile fracture model is used to generate a fracture locus for martensitic steel. Two sets of experiments are used to calibrate the model. The first method included a shear specimen, a specimen with a central hole and a notched specimen while in the second approach the notched specimen is replaced by a V-bend test to calibrate for plane strain conditions. The calibrated fracture model was integrated in a commercial FEA software and used to model fracture for a simple r...
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#1Ossama Mamdouh Badr (Deakin University)H-Index: 6
#2Bernard Rolfe (Deakin University)H-Index: 24
Last. Matthias Weiss (Deakin University)H-Index: 20
view all 3 authors...
Abstract High strength titanium alloy sheet, in particular Ti-6Al-4V, is used for structural applications; roll forming has been found to be an appropriate cold forming process for the manufacture of long components in Ti-6Al-4V. Roll forming Ti-6Al-4V at room temperature requires extensive FEA-assisted process development and optimisation to keep springback and part shape defects to a minimum. Currently the material behaviour of Ti-6Al-4V in the roll forming process is not well understood. Two ...
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#1Young Yun Woo (PNU: Pusan National University)H-Index: 6
#2Sang Wook Han (PNU: Pusan National University)H-Index: 8
Last. Young Hoon Moon (PNU: Pusan National University)H-Index: 28
view all 5 authors...
Abstract Flexible roll forming is an advanced sheet metal forming process that allows for the production of variable cross-section profiles. Longitudinal bow is one of the major shape defects found in roll-formed products. To characterize the degree of longitudinal bow during flexible roll forming, experiments were conducted on three different blank shapes: trapezoid, convex and concave. Symmetric U-sections with variable cross-sections were roll formed using the three sheet materials with diffe...
Source
#1Yaguang Li (SJTU: Shanghai Jiao Tong University)H-Index: 5
#2Yong Sun (UQ: University of Queensland)H-Index: 5
Last. Robert H. Wagoner (OSU: Ohio State University)H-Index: 58
view all 9 authors...
Advanced high strength steels (MISS) pose great challenges to sheet metal forming processes in vehicle components manufacturing with their increasing high strength and surface hardness. Chain-die forming is a recently proposed manufacturing method alternative to roll forming, aiming at reducing the redundant strain by enlarging the deformation length through a remarkably large rotation radius. In this work, the performance of AHSS in chain-die forming is investigated by experiment and simulation...
Source
#1S. K. Hazra (Warw.: University of Warwick)H-Index: 6
#2Panagiotis Efthymiadis (Warw.: University of Warwick)H-Index: 4
Last. Richard DashwoodH-Index: 30
view all 5 authors...
Ultra high strength steels (UHSS) have an ultimate tensile strength of greater than 1GPa. Typically, their ambient temperature elongation is less than 10% and as a result, they are rarely used in stamping applications. However, the continuous demand for the weight reduction of structures built for the transport sector means that such materials are attractive because they can be used for parts with thinner cross-sections while maintaining required in-service performance. One way to overcome the a...
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#1Tilman TraubH-Index: 4
#2Xin ChenH-Index: 1
Last. Peter GrocheH-Index: 24
view all 3 authors...
Roll forming is a widespread method for manufacturing cold rolled profiles. Increasing requirements regarding tolerances challenge existing procedures for designing roll forming processes. For instance, despite a large number of calculation methods, a reliable prediction of the initial sheet width has not been possible yet. The initial sheet width is crucial for the product quality since this dimension influences the lengths of the legs of the profile directly and thus the tolerances being achie...
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Cited By1
Newest
#1Zhenye Liang (SJTU: Shanghai Jiao Tong University)H-Index: 1
#2Liu Yang (SJTU: Shanghai Jiao Tong University)H-Index: 1
Last. Yinghong Peng (SJTU: Shanghai Jiao Tong University)H-Index: 25
view all 8 authors...
Abstract null null Chain-die forming can be used to manufacture Advanced High Strength Steels (AHSS) channel components. Flange wrinkling is one of typical defects for chain-die formed products. The purpose of this paper is to investigate the cause of flange wrinkling in chain-die forming of AHSS and to propose a potential method to suppress it. A hat channel product with a curved axis is formed as a benchmark to illustrate the mechanism of flange wrinkling in chain-die forming. When forming suc...
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