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Spreading method of sheet metal parts with multi-referenced points

WU Jian-jun,XUE Xiao-ping(Northwestern Polytechnic University,School of Mechatronics,Key Lab.of Ministry of Contemporary Design and Integrated Manufacturing Technology,Xi'an 710072,China)  
To solve the problems of wrong developed direction and location as well as the overlap of developed zones in the radial spreading process of sheet metal components with curved feature,by considering the related bending deformation process,a new radial spreading approach based on multi-referenced points with the consideration of outside normal direction of bended parts is developed,which can describe the bending process effectively.The effectiveness of this approach especially in dealing with the above problems is validated by practical application.The obtained blank shape is reasonable,and it can provide a better initial guess value for the one-step quick analysis and optimization.
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