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《Forging & Stamping Technology》 2007-05
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Numerical simulation in the drawing of engine hood exterior panel

ZHAO Xia,LI Fei(Vocational and Technical College,Liaoning University of Petroleum & Chemical Technology,Fushun 113001,China)  
Based on the elastic-plasticity theory of sheet forming and Dynaform software,the drawing process of the BoraA5's engine hook exterior panel was studied,and the drawing parameters and mould parameters were designed by the use of orthogonal experiment method.The effects of binder force,stamping speed,draw-bead depth and the gap between punch and die on wrinkle and crack when the exterior panel was drawn were studied.The results show that in forming the exterior panel,the impact of binder force and the stamping speed on the minimum local thickness is greater and the impact of the gap between punch and die and draw-bead depth on the minimum local thickness is smaller.That is the greater the binder force,the smaller the minimum local thickness;the greater the stamping speed,the smaller the minimum local thickness.According to numerical simulation,the reasons for wrinkle and crack were comprehensively analyzed,and the corresponding solution of drawing quality was given.The drawing scheme was applied to the real technology design and die manufacture.The results show that the simulation result fits with the actual forming process very well.
【CateGory Index】: TG386.32
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