1·On the analysis of the forming process of the reinforcing plate, introduced the forming process and the 3d design of piercing die.
分析上支座加强板的成形工艺，并着重介绍成形工艺中的冲孔模的三维设计。
2·The extrusion and piercing die was developed based on the technical analysis on the shaping characteristics of deep taper pipe with hole.
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。
3·Piercing technology for oblique holes on conical surface was analyzed and a new piercing die structure for the conical part was introduced.
分析了锥面斜孔冲裁的工艺，介绍了一种新型的锥形件冲孔模结构。
4·Give an analysis about the features of a welding seam pipe's piercing, and introduce the design clew of the welding seam pipe's piercing die using an instance.
分析了焊缝管冲孔的特点，通过实例介绍了该焊缝管冲孔模设计思路。
5·The technical characteristics of no-female die piercing on pipe were analyzed and the key points in design of a practical no-female die piercing die were presented.
分析了管材无凹模冲孔的工艺特点，提出了该类模具设计的要点。
6·Sliver strip melt piercing die and manual feeding mechanism are introduced, the design and manufacture of die key parts are analyzed, as the result, working efficiency gets improved.
介绍了银带熔体冲孔模和手工送料机构，分析了模具关键零件的设计和制造，提高了生产效率。
7·Introduced the characteristics of the gear box case, and determinded the reasonable forming process, designed the drawing die, the trimming die, the piercing die and the flanging die.
结合实际，介绍了带内孔的薄板锻件的工艺难点，并就此工艺难点的解决介绍了锻件切边、冲孔模具的优化设计。
8·The technological process for stamping the decoration part inside the car was analyzed. And the structure of the pressing and piercing die for the decoration part was mainly introduced.
分析了车厢内装饰件的冲压工艺，着重介绍了车厢内装饰件压形切口模的结构。
9·Characteristics of end board of heat exchanger of air conditioner have been introduced with technology analysis of several products and introduction of structure features of piercing die.
介绍了空调机换热器端板的结构特点，对其几种产品进行了工艺分析，在此基础上设计了端板冲孔模。
10·Through the improvement of the piercing die for the wave-shaped cage, cage positioning became accurate, the position tolerances of rivet holes were ensured, and technical requirements were met.
通过对浪形保持架冲孔模的改进，保持架定位准确，保证了铆钉孔位置公差，达到了工艺要求。