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NUMERICAL STUDY ON flanging AND SPRINGBACK OF STAMPED THICK METAL PLATE

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Acta Mechanica Solida Sinica 2001年第4期14卷 290-298页

作者： Hu Ping Liu Haipeng Liu Yuqi Jilin Univ Inst Automobile Panel Forming Tech Changchun 130025 Peoples R China

A quasi-three-dimensional shell element model, which can beeffectively used to simulate the flanging and spring-backdeformation, is introduced into the independently developed CAEsoftware, KMAS, In this model, a double surface contact algorithm,which allows the gap between punch and die to change, and a spring-back treatment scheme based on finite element meshing are *** then the flanging and spring-back deformations of the retractor'skickstand of a railcar made of stamped thick metal plate arenumerically simulated. The simulation results of flanging deformationare compared with those of international commercial software,PAM-STAMP, and experimental ones. Finally, a predicting scheme ofspring-back quantily for this problem is given.

关键词： quasi-three-dimensional shell element double surface contact algorithm flanging spring-back

Investigations on flanging of Aluminum Alloy Tube Under Pulsed Magnetic Force

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Journal of Iron and Steel Research International 2012年第S1期19卷 438-441页

作者： YU Hai-ping JIANG Hong-wei LI Chun-feng National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology

In this work,the magnetic pulse forming process was used to flange the AA 3003-O aluminum alloy tube to improve the flanging formability *** results show that there are critical discharge energy values for the flanging dies with varied slope *** mechanism of magnetic pulse flanging process is the bulging in contrast to the expanding of the quasi-static *** the flanging with 90 slope degree,the limited hoop strain at the outer fringe could be up to 0.54 without rapture,to which the limit of simple tension limit is improved by 85%in *** 180 degree flanging at tube end can be achieved by one time magnetic pulse forming.

关键词： magnetic pulse forming flanging forming limit aluminum alloy tube

Application of grey relational analysis in sheet metal forming for multi-response quality characteristics

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第5期8卷 805-811页

作者： XIE Yan-min YU Hu-ping CHEN Jun RUAN Xue-yu National Die ＆ Mold CAD Engineering Research Center Shanghai Jiao Tong University Shanghai 200030 China

The theory of grey systems is a new technique for performing prediction, relational analysis and decision making in many areas. In this paper, the use of grey relational analysis for optimizing the square hole flanging process parameters with considerations of the multiple response (the average flanging height, regular flanging and maximum strain) is introduced. Various flanging parameters, such as the blank inner radius rb, blank inner width B0, are considered. An orthogonal array is used for the experimental design. Multiple response values are obtained using finite element analysis (FEA). Optimal process parameters are determined by the grey relational grade obtained from the grey relational analysis for multi-performance characteristics (flanging height, regular flanging and maximum strain). Analysis of variance (ANOVA) for the grey relational grade is implemented. The results showed good agreement with the experiment result. Grey relational analysis can be applied in multiple response optimi-zation designs.

关键词： Grey relational analysis flanging Multiple response Optimization design

圆管大直径外翻边孔加工工艺设计与翻边力计算（英文）

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机床与液压 2015年第18期43卷 105-109页

作者：吴磊刘彬丁立刚中山火炬职业技术学院装备制造系广东中山528437 华南理工大学机械与汽车工程学院广州510641

针对现有圆管翻边工艺无法加工与圆管直径接近的外翻边孔的缺陷,提出了一种新的加工工艺方法。考虑新工艺的变形特点、加工硬化特性以及变形区的材料厚度的变化情况,推导出针对圆管翻边的翻边力计算公式。Abaqus仿真数据表明:相对于板... 详细信息

针对现有圆管翻边工艺无法加工与圆管直径接近的外翻边孔的缺陷,提出了一种新的加工工艺方法。考虑新工艺的变形特点、加工硬化特性以及变形区的材料厚度的变化情况,推导出针对圆管翻边的翻边力计算公式。Abaqus仿真数据表明:相对于板材翻边力计算公式,本文的翻边力计算公式更加精确。

关键词： Flange, flanging force, Work-hardening, FEM simulation