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通过对锥形缩口变形区缩口过程的力学分析，建立了反映变形区应力变化规律的数学模型和缩口计算公式；探讨了缩口成形中各因素的影响和制约关系。所建模型和公式可用于设计和生产。
Through the mechanical analysis of the process of shrinkage of the tapered neck, the mathematical model and shrinkage calculation formula are established to reflect the stress variation in the deformed zone. The influences and constraints of various factors in the neck forming process are discussed. The models and formulas can be used for design and production.