Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (5): 115-121.

• Mechanical Engineering • Previous Articles     Next Articles

Numerical Simulation of One-Path Neck·Spinning of Oblique Tubes

Xia Qin-xiang1  Liang Bai-xiang1  Cheng Xiu-quan2  Ruan Feng1   

  1. 1.College of Mechanical Engineering,South China Univ.of Tech.,Guangzhou 5 10640,Guangdong,China;2.Guangzhou Civil Aviation College,Guangzhou 510403,Guangdong,China
  • Received:2005-09-01 Online:2006-05-25 Published:2006-05-25
  • Contact: 夏琴香(1964-)，女，教授，主要从事塑性成形理论、工艺、模具及设备等方面的研究。 E-mail:meqxxia@scut.edu.cn
  • About author:夏琴香(1964-)，女，教授，主要从事塑性成形理论、工艺、模具及设备等方面的研究。
  • Supported by:

    国家自然科学基金资助项目(50275054)；广东省自然科学基金资助项目(020923)；广东省工业科技攻关计划项目(2003C102013)

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Abstract:

In order to investigate the mechanism of non-axisymmetric spinning and provide accordance for the corre-sponding parameter optimization and process design,a finite-element analytical(FEA)model is established based on the 3 D elastic·-plastic theory to numerically simulate the neck·-spinning process of oblique tubes by the FEA MSC.MARC software.The characteristics of metal flow and the distributions of the stress and the strain in the onepath spinning aye then obtained,and the potential defects and defect areas in the spinning are forecasted.Both the simulative and the experimental results show that the distributions of the deformed mesh,the stress,the strain and the thickness of the workpiece are all asymmetric due to the oblique spinning,that the distributions of the principal stresses and strains in the circumferential direction are sinusoidal or cosinoidal functions,and that,in the spinning,severe thinning occurs near the initial spinning area due to the leaning of workpiece towards the zero region,that is,the dangerous region where breaking may occur.

Key words: oblique tube, neck-spinning, stress, strain, numerical simulation, MSC．MARC software