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。
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。
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。
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。
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。
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。
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。
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。
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。
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。
Introduced a kind of compound triming die with connecting rods, it could finished the piercing and triming and sizing process in one press, the working efficiency is high, triming quality is good.
介绍了一种复合式连杆切边模，可在压力机一次行程过程中完成连杆的冲孔、切边和整形工序，该模具具有工作效率高、切边质量好等优点。
Piercing technology of the rear mudguard of motorcycle has been analysed and the die structure has been emphatically introduced.
分析了摩托车后挡泥板的冲孔工艺，着重介绍了摩托车后挡泥板冲孔模的结构。
According to the characteristics of the part, proposed piercing process with concave die. Introduced die structure and working process.
根据该零件特点，提出了采用有凹模冲孔加工，并介绍了模具结构及工作过程。
The wear of piercing punch is one of main die lose efficacy.
冲孔凸模磨损是模具失效的主要形式之一。
The production process and its features of piercing plug by precision hot-die-forging are detailed.
本文介绍了精密热模锻穿孔顶头的生产工艺及工艺特点。
And the importance of the die structure to the piercing precision and the die life was explained.
说明了模具结构对冲裁精度及模具使用寿命的重要性。
This paper developed the influence of die-rivet volume ratio on self-piercing riveting joints of Al-to-steel and steel-to-Al combinations separately.
研究了自冲铆接中模钉体积比对铝-钢以及钢-铝铆接接头的影响。
This paper developed the influence of die-rivet volume ratio on self-piercing riveting joints of Al-to-steel and steel-to-Al combinations separately.
研究了自冲铆接中模钉体积比对铝-钢以及钢-铝铆接接头的影响。
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