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    頂頭穿軋錐形狀對二次穿孔毛管壁厚不均的影響

    Effect of Cone Shape of Piercing Plug on Shell Wall Thickness Nonuniformity during Secondary Piercing Process

    • 摘要: 采用三種不同穿軋錐形狀的頂頭,通過二次穿孔試驗研究了毛管壁厚變化。結(jié)果表明:基于一定變形條件的公式所設(shè)計的頂頭穿軋錐具有較好的減小毛管壁厚不均的作用,這與穿軋區(qū)后半程內(nèi)穿軋管坯的單位壓下量和軸向延伸較小且均勻有關(guān)。

       

      Abstract: Tests are made with three different piercing plug cone shapes to identify shell gauge changes during secondary piercing process.The result shows that the plug cone shape design ed according to the formula related to specific deformation conditions acts well in reducing the shell wall thickness nonuniformity,which is in close connection with the fact that in the second section of the piercing zone,the unit screw-down a mount imposed on the shell being pierced and the shell axial elongation are smaller and more uniform.

       

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