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Abstract：
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The sinking process with thin walled cylindrical is a new technology, which will be used to produce complicated automobile parts Compared with traditional method of whirling process, it can consumedly decrease investment for equipments and increase manufacturing efficiency and buckling at the top These defects are affected by the forming parameters such as material properties, the friction coefficient μ , the die semi cone angle α , the reduction ratio R f /R 0 Regarding back spring seat of car as example, this paper has analyzed the influence of aforementioned parameters on designing of the sinking process And optimizing the process design by using the FEM , a more practical process scheme is gained through FEM, which could shorten the process developed cycle, raise the productive efficiency and decrease the production cost
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AuthorIntro：
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Reference：
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1 FritzKlockeExamplesofFEMapplicationinmanufacturingtechnologyJournalofMaterialsprocessingTechnology,2002,200:450～457
2 Jong yopkimOptimumblankdesignofanautomobilesubframeJournalofMaterialsprocessingTechnology,2000,101:31～34
3 滕宏春,张凤兰传动轴管精密缩径上限解析北京:农业机械学报,2000,99:3
4 徐秉业塑性力学北京:高等教育出版社,1988
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