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通过建立钟形壳精密冷缩径的流动模式，采用上限法对冷缩径变形进行分析，导出冷缩径时的缩径力、变形能及作用于凹模壁单位压力的表达式，并获得了工艺参数对冷缩径力能参数影响的变化规律。
By establishing the flow pattern of bell-shaped shell precision shrinking diameter, the upper limit method is used to analyze the deformation of cold-shrinking diameter and the shrinking force, deformation energy and the expression of unit pressure acting on the wall of the die are derived and obtained The influence of process parameters on the parameters of cold shrinking capacity was studied.