用一般先冲孔后压型的方法成形端面螺纹工件，质量很难达到产品锁紧要求。
The part quality is hard to reach the product locking requirement when forming the end surface thread after piercing.
根据所确定的工艺方案对各工序模具进行设计，并介绍了成形模和修边侧冲孔模的模具结构以及关键零件的设计。
Moulds of each process is designed in light of the process optimized, and introducing the mould structure of the forming mould and side punch mould for trimming, and the design of key pieces.
针对带孔深锥形管件的成形特点进行了工艺分析，确定了成形方案，设计了锥形管挤压模和冲孔模。
The extrusion and piercing die was developed based on the technical analysis on the shaping characteristics of deep taper pipe with hole.
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