The 32 inch high neck flange with large external diameter and high height,the material utilization rate was very low by using the traditional forging production process;Therefore,a new forming method of up-setting and extrusion was proposed for the first time by analysis the structure of 32 inch high neck flange,The deformation process of high neck flange was investigated by the finite element method and verified the possibility of new method;also we designed new molding and verified the new production process by actual production;the results showed that the new production process can greatly increase the material utilization ratio and decrease the manufacturing cost.
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