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Stamping process design of oil filler

WANG Yue-zhen1,2,ZHAO Zhen-duo1,LIU Jian-xin2,LI Bin2,LI Feng2(1.School of Materials Science and Engineering,Shandong University,Jinan 250061,China;2.Complete Set Plant,Weichai Power Co.,Ltd.,Weifang 261001,China)  
The determination and verification of the process planning about tube-shaped parts were introduced by comparing drawing and necking process of the parts.The forming character of necking process was explained.Adopting the principle of the volume of material constant in the deformation process,the billet height of the necking tube was calculated using integral calculus.The key technology problems existing in the design and manufacture of the die were also studied.Qualified parts were produced with simple necking die.The die can ensure the stability of process;increase the utilization ratio of material and production efficiency.Sometimes it is more economic for slender tubular parts to neck instead of drawing.
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