李春庄,秦贤军,张霞,等.缩径挤压工艺及模具设计[J].精密成形工程,2012,4(5):80-81,88. LI Chun-zhuang,QIN Xian-jun,ZHANG Xia,et al.Necking and Extrusion Technology and Die Design[J].Journal of Netshape Forming Engineering,2012,4(5):80-81,88.
According to the forming characteristics the billet preparation before forming is analyzed and extrusion is taken as a procedure. The combined die of forward extrusion necking and backward extrusion is designed. The main points of die design, die structure, working principle and actual application effect are introduced.
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